Consulta: subjectFacets:"Growth"
Registros recuperados: 919
Data/hora: 06/06/2024 03:43:26

Efeitos do cobre no desenvolvimento e produção de grãos de feijão-caupi em Latossolo Amarelo
Provedor de dados: 196
Autores: dos Santos de Lima, Silvia Kalini; Viégas, Ismael de Jesus Matos; Oliveira da Silva, Alasse; da Silva Conceição, Elane Cristina; Silva, Aline Oliveira da; Albuquerque Gomes, Jhonatah.
This study aimed to evaluate the effects of Cu doses on the development and yield of cowpea bean grains, cultivars BR3 Tracuateua and Canapu, in terms of fertility in a medium texture Oxisol in the eastern Amazon, Brazil. The experiment was carried out in a greenhouse at the Universidade Federal Rural (UFRA), on the Capanema Campus, Pará. The experimental design was a completely randomized arrangement of 5x2 factorial, with five repetitions, where the first factor is the use of five doses (0, 10, 20, 30 and 60 mg dm-3 of Cu) having copper sulfate as a source, while the second factor is the use of cultivars BR3 Tracuateua and Canapu. Cowpea bean cultivars have different behaviors in terms of Cu requirement and cultivar BR3 Tracuateua, in general, is more...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata (L.); Growth; Micronutriente; Grains; Vigna unguiculata (L.); Crescimento; Micronutriente; Grãos.
Ano: 2022
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6845

Efecto del vitafer en el comportamiento de ovinos en finalización en pastoreo suplementados con sacchapulido.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Díaz Quevedo, Víctor.
Con la finalidad de conocer el efecto del Vitafert en ovinos en finalización suplementados con Sacchapulido bajo un sistema semi-estabulado, se utilizaron 24 ovinos enteros híbridos (cruces entre los grupos raciales Pelibuey, Blackbelly y Dorper), los cuales se distribuyeron al  azar a uno de dos tratamientos, tratamiento 1: Pastoreo + Sacchapulido + Vitafert y tratamiento 2: Pastoreo + Sacchapulido (12 ovinos por tratamiento). Se utilizaron ovinos con una edad y peso vivo de 13.5±0.3 meses y 22±0.6 kg. El Sacchapulido y Vitafert se ofrecieron de 8:00 a 10:00 h en corrales individuales. El consumo total estimado de materia seca fue 453.4±11.5 g. Los tratamientos estudiados no tuvieron efecto (P&gt;0.05) sobre la GDP de los ovinos. En Sacchapulido más...
Palavras-chave: Ovinos de pelo; Crecimiento; Sacchapulido; Vitafert; Trópico húmedo; Hair sheep; Growth; Humid tropic; Maestría; Producción Agroalimentria en el Trópico.
Ano: 2010
URL: http://hdl.handle.net/10521/342

Crecimiento del cedro (Cedrela adorata L.) en etapa juvenil bajo riego, fertilización y aplicación de insecticida y su relación con la incidencia de Hypsipyla grandella Z
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Castillo Domínguez, Ernesto.
En el estado de Tabasco, localizado en el trópico de México, se tienen plantadas alrededor de 7,000 ha de cedro (Cedrela odorata L), como  una respuesta a los procesos de deforestación de la región y como una forma de suplir las necesidades de materia prima de la industria de la madera. La presente investigación tuvo como objetivo evaluar el crecimiento del cedro en etapa juvenil bajo riego, fertilización y aplicación de insecticida y su relación con la incidencia de Hypsipyla grandella Zeller. El estudio se desarrolló de abril a de septiembre de 2008 en una plantación de cedro de 10 meses de edad plantada en marco real de 3x3 m, con una densidad de 1100 plantas/ha, localizada en el municipio de Cárdenas, Tabasco (18°01´N, 93°03´ W). Las variables...
Tipo: Tesis
Palavras-chave: Cedrela odorata; Irrigación; Fertilización; Insecticida; Crecimiento; Maestría; Producción Agroalimentaria en el Trópico; Irrigation; Fertilization; Insecticide; Growth.
Ano: 2008
URL: http://hdl.handle.net/10521/1569

Establecimiento de Arachis pintoi Krap. &amp; Greg. Como cobertura de suelo en plátano macho en Cárdenas, Tabasco
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Ramos Hernández, Eder.
El experimento se realizó en Cárdenas, Tabasco en una plantación de plátano macho, en un suelo con textura franca, pH moderadamente ácido, contenido de materia orgánica y nitrógeno total bajo; con la finalidad de evaluar la repuesta al establecimiento de Arachis pintoi Krap. y Greg. como una cobertura viva, el cual se plantó a una distancia de 30 cm entre plantas y líneas. Se evaluaron tres porcentajes de sombra producida por la plantación de plátano macho (21, 45 y 50 %). Estadísticamente el nivel con menor porcentaje de sombra presentó los valores más altos en el índice de sobrevivencia de estolones de Arachis pintoi (ISE) a los 60 días después de la siembra (dds) y registró cobertura del suelo de 94.2 % y crecimiento lateral de estolones de 112.5 cm con...
Tipo: Tesis
Palavras-chave: Sombra; Sobrevivencia; Crecimiento; Altura; Efectividad; Materia seca; Shannon-Weaver; Similtud; Shade; Survival; Growth; Effectivenness; Dry matter; Shannon-Weaver; Similarity.
Ano: 2009
URL: http://hdl.handle.net/10521/1603

Desarrollo de fruto y calidad de semilla de cinco variedades de Physalis ixocarpa Brot. en el Valle del Fuerte, Sinaloa
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Rodríguez Burgos, Alejo.
El tomate de cáscara se explota en Sinaloa (México) desde hace 20 años y su importancia se incrementó en la última década. Existe muy poca información sistematizada del manejo y potencial productivo de diferentes variedades. Aquí se estudió el desarrollo de fruto y semilla, y la calidad de esta, en cinco variedades (Querétaro, Rendidora, Mahone, Orizaba, Carriceño) sembradas en dos fechas (FS1: 6 de septiembre y FS2: 16 de octubre de 2008). Las variedades Querétaro y Mahone tuvieron en promedio un fruto más largo (37 y 34 cm), ancho (43 y 40 cm) y pesado (38 y 34 g, respectivamente), lo que llevó a que Querétaro tuviera el rendimiento de fruto (RendF) más alto (53 t ha-1). El mejor desarrollo de cultivo se observó en FS1, debido a que en FS2 se presentó un...
Palavras-chave: Fechas de siembra; Calidad de semilla; Rendimiento; Crecimiento; Physalis ixocarpa Brot; Seeding date; Seed quality; Yield; Growth; Maestría; Producción de semillas.
Ano: 2010
URL: http://hdl.handle.net/10521/123

La deuda pública y el PIB, de las entidades federativas de México.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Domínguez Olán, Said Esteban.
Treinta y un Entidades Federativas de México se encuentran endeudadas con empréstitos de carácter público, en un rango que va desde 404.8 millones de pesos el más bajo, (Campeche), hasta 52,162.4 millones de pesos el más alto (Distrito Federal); el objetivo de este estudio fue evaluar la influencia de la deuda pública de los Estados y el Distrito Federal de México, sobre los indicadores macroeconómicos, consumo privado, formación bruta de capital (Activos Fijos) y el Producto Interno Bruto de las mismas entidades. Con un modelo de datos panel se obtiene que la tasa de crecimiento del PIB y de las otras variables de estudio por entidad federativa, es afectada negativamente por el aumento de deuda pública de la entidad, pero no de manera significativa...
Palavras-chave: Consumo privado; Formación bruta de capital; Producto interno bruto; Modelos de datos panel; Indicadores macroeconómicos; Crecimiento; Private consumption; Gross capital formation; GDP; Public debt; Panel data models; Macroeconomic indicators; Growth; Economía; Maestría; Empréstitos de carácter público.
Ano: 2013
URL: http://hdl.handle.net/10521/2118

Respuestas agronómicas y fisiológicas de pepino a diferentes concentraciones de cloruro de sodio
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: García Morales, Soledad.
La salinidad del suelo es una de las principales limitantes en la producción de  alimentos debido a que afecta negativamente muchos aspectos del metabolismo y  rendimiento de las plantas cultivadas. La respuesta de las plantas a la salinidad  consiste en numerosos procesos que funcionan coordinadamente para aliviar tanto el  estrés osmótico como la toxicidad y el desbalance nutrimental.   La presente investigación fue conducida bajo condiciones de invernadero durante el  período Otoño del 2006 en el Colegio de Postgraduados, Campus Montecillo. Se  evaluó el efecto de cinco concentraciones de cloruro de sodio (0, 47, 97, 150 y 205  mM de NaCl) suministradas en la solución nutritiva Steiner al 100 % empleada para  el riego, para analizar sus efectos en...
Tipo: Tesis
Palavras-chave: Salinidad; Crecimiento; Rendimiento; Calidad de frutos; Fisiología de plantas; Nutrición de plantas; Maestría; Edafología; Salinity; Growth; Yield; Fruit quality; Plant physiology; Plant nutrition.
Ano: 2007
URL: http://hdl.handle.net/10521/1315

Indicadores morfológicos y fisiológicos en Abies religiosa y su capacidad predictiva del desempeño en campo.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Navarro Sandoval, José Luis.
El tamaño y las características morfológicas de la planta son factores importantes para lograr un buen desempeño en las plantaciones de restauración ecológica; las prácticas de cultivo en vivero que promueven el crecimiento radical y un adecuado nivel nutrimental para mejorar el desempeño de la planta en campo son indispensables en este proceso. Con el propósito de evaluar el efecto de la fertilización, el daño por heladas y la categoría diamétrica en el crecimiento, la morfología, la asignación de biomasa y el estado nutrimental en vivero, y su relación con la supervivencia y crecimiento de las plantas en dos ambientes de plantación (S1 y S2), se estableció un experimento con cuatro niveles de fertilización (T-50, TBase, T+50 y T+100), dos condiciones del...
Palavras-chave: Fertilización; Biomasa; Morfología; Tolerancia a la deshidratación; Supervivencia; Crecimiento; Fertilization; Biomass; Seedling morphology; Dehydration tolerance; Survival; Growth; Forestal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2103

Mezclas de vermicompost y tezontle, diseñadas mediante un programa de optimización en SAS, para el cultivo de tomate bajo invernadero e hidroponía.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Cruz Crespo, Elia.
Uno de los aspectos más importantes para el manejo sustentable de los recursos productivos naturales es la incorporación de materia orgánica en el sistema de producción. En los sistemas hidropónicos se ha propuesto la sustitución de los medios de crecimiento no renovables, como turbas,  por el uso de compost y vermicompost de materiales diversos. En tomate se ha demostrado que las mezclas con vermicompost  influyen en el crecimiento, rendimiento y calidad de los cultivos; sin embargo, la evaluación de  las mezclas de sustratos en general, se han llevado a cabo mediante propuestas aisladas no sistematizadas. Por ello, los objetivos de la presente investigación fueron determinar  a través de un programa de optimización en SAS, mezclas de vermicompost con...
Palavras-chave: Crecimiento; Nutrimentos; Calidad; Solución de Steiner; Fertilización inorgánica; Growth; Nutriments; Quality; Steiner's nutrient solution; Inorganic fertilization; Doctorado; Edafología.
Ano: 2010
URL: http://hdl.handle.net/10521/293

Desarrollo de fruto y calidad de semilla de cinco variedades de Physalis ixocarpa Brot. en el Valle del Fuerte, Sinaloa
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Rodríguez Burgos, Alejo.
El tomate de cáscara se explota en Sinaloa (México) desde hace 20 años y su importancia se incrementó en la última década. Existe muy poca información sistematizada del manejo y potencial productivo de diferentes variedades. Aquí se estudió el desarrollo de fruto y semilla, y la calidad de esta, en cinco variedades (Querétaro, Rendidora, Mahone, Orizaba, Carriceño) sembradas en dos fechas (FS1: 6 de septiembre y FS2: 16 de octubre de 2008). Las variedades Querétaro y Mahone tuvieron en promedio un fruto más largo (37 y 34 cm), ancho (43 y 40 cm) y pesado (38 y 34 g, respectivamente), lo que llevó a que Querétaro tuviera el rendimiento de fruto (RendF) más alto (53 t ha-1). El mejor desarrollo de cultivo se observó en FS1, debido a que en FS2 se presentó un...
Palavras-chave: Fechas de siembra; Calidad de semilla; Rendimiento; Crecimiento; Physalis ixocarpa Brot; Seeding date; Seed quality; Yield; Growth; Maestría; Producción de semillas.
Ano: 2010
URL: http://hdl.handle.net/10521/123

Las microfinanzas en las condiciones de vida, ingreso y cultura financiera y empresarial. El caso de FINSOL Texcoco-Chimalhuacán, Estado de México
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Sampayo Paredes, Humberto.
En México, como en prácticamente todo el mundo, se experimenta un acelerado  crecimiento del sector de las microfinanzas de corte comercial, aun cuando se trata  de un sector relativamente nuevo; desde principios de la década los 90´s, para el  caso específico de México. Ello se debe a cuatro factores básicos: a) La enorme  demanda de servicios financieros por parte de millones de personas de bajos  ingresos; b) El diseño de una tecnología apropiada para acercar estos servicios a  esa población; c) La presencia de inversionistas dispuestos a invertir en esta  industria y; d) La difusión mundial que se le ha dado como instrumento de combate a  la pobreza (objetivos del milenio).   Lo anterior ha dado origen a múltiples estudios enfocados a evaluar los...
Tipo: Tesis
Palavras-chave: Microfinanzas; Crecimiento; Impactos; Pobreza; Bienestar; Maestría; Desarrollo Rural; Microfinance; Growth; Impact; Poverty; Welfare.
Ano: 2008
URL: http://hdl.handle.net/10521/1532

Caracterización fisiológica y productiva de dos variedades mexicanas de fresa (Fragaria x Ananassa) para el subtrópico.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Estrada Nolasco, Celia.
Se estudiaron parámetros fisiológicos y de rendimiento de cuatro distintas variedades de fresa (Fragaria x anannassa Duch.), dos variedades mexicanas CP Zamorana (CP 02-01) y CP Jacona (CP 02-04) y dos variedades comerciales extranjeras (Festival y Giant). La evaluación se llevó a cabo en el periodo de otoño 2009. Se midieron variables de crecimiento, de producción y variables fisiológicas El comportamiento de la transpiración (TT), conductancia estomática (CE) y la tasa de fotosíntesis neta (TF) varió durante el periodo de cosecha. Las variedades Zamorana y Jacona presentaron las mayores TF en comparación a las variedades introducidas. Así, las TF fueron mayores para la variedad Jacona, seguida de Zamorana, Festival y Giant. Las diferencias en TF entre...
Palavras-chave: Intercambio de gases; Crecimiento; Producción; Rendimiento; Fragaria x ananassa; Gas exchange; Growth; Yield; Strawberry; Maestría; Fruticultura.
Ano: 2011
URL: http://hdl.handle.net/10521/391

Características bioquímico-fisilógicas de la germinación y desarrollo de plantas jóvenes de maguey (Agave) y su relación con la especie, temperatura y potencial de agua del sustrato.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Ramírez Tobías, Hugo Magdaleno.
Los procesos fisiológicos como la germinación y el crecimiento de las especies de Agave son modificados por los factores ambientales en función de las características climáticas prevalecientes en las áreas de distribución de las especies. Para probar esta hipótesis se evaluó la germinación de las semillas de ocho especies de Agave en un gradiente de temperatura entre 10 y 40 °C y de potencial de agua (ψ) de -0.03 a -1.5 MPa en condiciones de laboratorio, y el efecto de la disminución del ψ del sustrato (desde -0.7 hasta -6.0 MPa, con un promedio de -3.5) en plantas jóvenes de las mismas especies durante 14 meses en condiciones de invernadero. La germinación acumulada (GA) máxima (90% o mayor) se registró alrededor de 25 °C y con -0.03 MPa entre 80 y 190 h,...
Palavras-chave: Agave; Germinación óptima; Crecimiento; Restricción de humedad; Tolerancia ambiental; Reacción fisiológica y morfológica; Optimum germination; Growth; Moisture restriction; Environmental tolerance; Physiological and morphological responses; Doctorado; Botánica.
Ano: 2010
URL: http://hdl.handle.net/10521/307

Establecimiento de Arachis pintoi Krap. &amp; Greg. como cobertura de suelo en plátano macho en Cárdenas, Tabasco
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Ramos Hernández, Eder.
El experimento se realizó en Cárdenas, Tabasco en una plantación de plátano macho,  en un suelo con textura franca, pH moderadamente ácido, contenido de materia  orgánica y nitrógeno total bajo; con la finalidad de evaluar la repuesta al  establecimiento de Arachis pintoi Krap. y Greg. como una cobertura viva, el cual se  plantó a una distancia de 30 cm entre plantas y líneas. Se evaluaron tres porcentajes  de sombra producida por la plantación de plátano macho (21, 45 y 50 %).  Estadísticamente el nivel con menor porcentaje de sombra presentó los valores más  altos en el índice de sobrevivencia de estolones de Arachis pintoi (ISE) a los 60 días  después de la siembra (dds) y registró cobertura del suelo de 94.2 % y crecimiento  lateral de estolones de...
Tipo: Tesis
Palavras-chave: Sombra; Sobrevivencia; Crecimiento; Altura; Efectividad; Materia seca; Shannon-Weaver; Similtud; Maestría; Producción Agroalimentaria en el Trópico; Shade; Survival; Growth; Effectivenness; Dry matter; Similarity.
Ano: 2009
URL: http://hdl.handle.net/10521/1276

Respuestas fisiológicas y bioquímicas de plántulas de pimiento morrón (Capsicum annuum L) a factores de estrés abiótico.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Hernández Bautista, Leonel.
En la presente investigación se realizaron dos experimentos con el objetivo de evaluar el efecto de cloruro de sodio (NaCl) y cadmio (Cd) en variables de crecimiento, fisiológicas y bioquímicas de plántulas de pimiento morrón variedad Yolo Wonder. Ambos experimentos fueron conducidos bajo condiciones de invernadero, en cultivo hidropónico en placas flotantes en contenedores de 3 L de capacidad, utilizando la solución nutritiva Steiner al 50%. En el primer experimento se trataron las plántulas de pimiento durante 30 días con diferentes concentraciones de NaCl (0, 25 y 50 mM), posteriormente se evaluaron parámetros de crecimiento, variables fisiológicas y acumulación de macro y micronutrimentos. La adición de 25 y 50 mM de NaCl disminuyen significativamente...
Palavras-chave: Yolo Wonder; Cloruro de sodio; Cadmio; Crecimiento; Biomasa; Variables fisiológicas; Sodium chloride; Cadmium; Growth; Biomass; Physiological variables; Fisiología Vegetal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2164

Navigating the adaptive cycle: an approach to managing the resilience of social systems
Provedor de dados: Ecology and Society
Autores: Fath, Brian D; Advanced Systems Analysis, International Institute for Applied Systems Analysis; Department of Biological Sciences, Towson University; bfath@towson.edu; Dean, Carly A; Advanced Systems Analysis, International Institute for Applied Systems Analysis; carly.ann.dean@gmail.com; Katzmair, Harald; FAS.research; harald.katzmair@fas.at.
The concept of resilience continues to crescendo since the 1990s, touching on multiple fields with multiple interpretations and uses. Here, we start from its origins in systems ecology, framing the resilience concept explicitly in the adaptive cycle with the observation that resilient systems are ones that successfully navigate all stages of growth, development, collapse, and reorientation of this cycle. The model is explored in terms of the traps and pathologies that hinder this successful navigation, particularly when applied to socioeconomic organizations and decision-management situations. For example, for continuous function over the adaptive life cycle, a system needs activation energy or resources to grow, followed by adequate structure and...
Tipo: Peer-Reviewed Insight
Palavras-chave: Adaptive cycle; Collapse; Development; Growth; Re-orientation; Resilience; Succession; Thresholds.
Ano: 2015

Improved growth model for two-stage continuous cultures of Lactobacillus helveticus
Provedor de dados: Electronic Journal of Biotechnology
Autores: Bouguettoucha,Abdallah; Balannec,Béatrice; Nacef,Saci; Amrane,Abdeltif.
An unstructured model for growth and lactic acid production during two-stage continuous cultures of Lactobacillus helveticus was previously developed. The Verlhust model was considered to describe growth kinetics. Production models was based on modified Luedeking-Piret expressions involving an inhibitory effect for the first stage (seed culture) and a nutritional limitation effect for the second stage (culture). To account for the decrease of the biomass concentration observed in the second stage, the dilution rate Dc was replaced by an exponential term of the dilution rate &lt;img border=0 width=84 height=36 src="http://fbpe/img/ejb/v13n5/a07/image002.gif" align=middle&gt;in the growth and product relations. Contrarily to the previous model, the important...
Tipo: Journal article
Palavras-chave: Continuous culture; Growth; Lactic acid fermentation; Substrate limitation; Unstructured models.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500007

Evaluating kinetic and physiological features of rCHO-K1 cells cultured on microcarriers for production of a recombinant metalloprotease/disintegrin
Provedor de dados: Electronic Journal of Biotechnology
Autores: Swiech,Kamilla; da Silva,Gracinda M.C; Zangirolami,Teresa C; Iemma,Mônica R.C; Selistre-de-Araújo,Heloísa S; Suazo,Cláudio A.T.
We present kinetic and physiological data regarding the culturing of rCHO-K1 cells on various microcarriers, to evaluate the potential of this culture strategy for mass production of these cells and expression of a recombinant disintegrin. Cultures were performed in 500 mL spinner flasks in DMEM culture medium with 10% v/v fetal calf serum, gently shaken at 37ºC, pH 7.4, in a 10% v/v CO2 atmosphere. The following values were obtained, respectively, for the adhesion time-constant Ka (h) and specific growth rate &amp;#956;max (d-1) on each microcarrier: Cytodex 1 (0.91, 0.45), Cultispher S (0.28, 0.34), Immobasil FS (0.85, 0.52) and Pronectin F (5.12, 0.67). Metabolic characteristics showed some variation among the cultures with the four microcarriers, the...
Tipo: Journal article
Palavras-chave: Adhesion; Animal cell; CHO-K1; Growth; Microcarrier; Recombinant disintegrin.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000200004

WATER RELATIONS AT THE INITIAL SUGARCANE GROWTH PHASE UNDER VARIABLE WATER DEFICIT
Provedor de dados: Engenharia Agrícola
Autores: Mauri,Robson; Coelho,Rubens D.; Fraga Junior,Eusímio F.; Barbosa,Fernando Da S.; Leal,Daniel P. V.
ABSTRACT This study aimed to quantify water deficit levels that compromise sugarcane initial growth exposed to different availability soil depths. The experiment was conducted in a greenhouse by using 100-liter capacity asbestos-cement boxes filled with different soil layers simulating depths of 10, 20, 30, and 40 cm. Water deficit levels were represented by accumulated reference evapotranspiration of 0, 40, 80, 120, 160, 200, 240, and 280 mm, which was considered from planting to irrigation return. Soil moisture at field capacity at planting time was sufficient to promote sprouting and emergence regardless the water deficit level that was subsequently exposed. For soil depths of 10 and 20 cm, a 160-mm water deficit level caused total plant death. On the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Irrigation; Sprouting; Saccharum spp.; Growth.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200268

Growth and carcass traits associated with GH1/Alu I and POU1F1/Hinf I gene polymorphisms in Zebu and crossbred beef cattle
Provedor de dados: Genetics and Molecular Biology
Autores: Curi,Rogério A.; Palmieri,Darío A.; Suguisawa,Liliane; Oliveira,Henrique N. de; Silveira,Antonio C.; Lopes,Catalina R.
The objectives of the present study were to estimate the allele and genotype frequencies of the GH1/Alu I and POU1F1/Hinf I polymorphisms in beef cattle belonging to different genetic groups and to determine the effects of these polymorphisms on growth and carcass traits in cattle submitted to feedlot management, an intensive production model. Genotyping was performed on 384 animals, including 79 Nellore, 30 Canchim (5/8 Charolais + 3/8 Zebu), 30 Simmental x Nellore crossbred and 245 Angus x Nellore crossbred cattle. Body weight, weight gain, dressing percentage, Longissimus dorsi area and backfat thickness were fitted using the General Linear Model (GLM) procedure of the SAS program and the least square means of the genotypes were compared using the F...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Polymorphisms; Candidate gene; Growth; Carcass.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100012

The association of CAPN1 316 marker genotypes with growth and meat quality traits of steers finished on pasture
Provedor de dados: Genetics and Molecular Biology
Autores: Miquel,María C.; Villarreal,Edgardo; Mezzadra,Carlos; Melucci,Lilia; Soria,Liliana; Corva,Pablo; Schor,Alejandro.
The objective of this paper was to determine the association of a SNP in the µ-calpain gene at position 316 with growth and quality of meat traits of steers grown on pasture. Fifty-nine Brangus and 20 Angus steers were genotyped for CAPN1 316. Warner Bratzler shear force was measured in l. lumborum samples after a 7-day aging period. A multivariate analysis of variance was performed, including shear force (WBSF), final weight (FW), average daily gain (ADG), backfat thickness (BFT), average monthly fat thickness gain (AMFTG), rib-eye area (REA), and beef rib-eye depth (RED) as dependent variables. The CAPN1 316 genotype was statistically significant. Univariate analyses were done with these variables. The marker genotype was statistically significant (p...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Tenderness; Growth; Molecular marker; Multivariate analysis.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300011

Genotype by environment interaction for 450-day weight of Nelore cattle analyzed by reaction norm models
Provedor de dados: Genetics and Molecular Biology
Autores: Pégolo,Newton T.; Oliveira,Henrique N.; Albuquerque,Lúcia G.; Bezerra,Luiz Antonio F.; Lôbo,Raysildo B.
Genotype by environment interactions (GEI) have attracted increasing attention in tropical breeding programs because of the variety of production systems involved. In this work, we assessed GEI in 450-day adjusted weight (W450) Nelore cattle from 366 Brazilian herds by comparing traditional univariate single-environment model analysis (UM) and random regression first order reaction norm models for six environmental variables: standard deviations of herd-year (RRMw) and herd-year-season-management (RRMw-m) groups for mean W450, standard deviations of herd-year (RRMg) and herd-year-season-management (RRMg-m) groups adjusted for 365-450 days weight gain (G450) averages, and two iterative algorithms using herd-year-season-management group solution estimates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Genotype by environment interaction; Plasticity; Random regression; Robustness.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200013

Effects of CSN3 and LGB gene polymorphisms on production traits in beef cattle
Provedor de dados: Genetics and Molecular Biology
Autores: Curi,Rogério A.; Oliveira,Henrique N. de; Gimenes,Marcos A.; Silveira,Antonio C.; Lopes,Catalina R.
The objective of the present study was to estimate the allele and genotype frequencies of the CSN3/HinfI and LGB/HaeIII gene polymorphisms in beef cattle belonging to different genetic groups, and to determine the effects of these polymorphisms on growth and carcass traits in these animals, which are submitted to an intensive production model. Genotyping was performed on 79 Nelore, 30 Canchim (5/8 Charolais + 3/8 Zebu) and 275 crossbred cattle originating from the crosses of Simmental (n = 30) and Angus (n = 245) sires with Nelore females. Body weight, weight gain, dressing percentage, longissimus dorsi area and backfat thickness were fitted using the GLM procedure, and least square means of the genotypes were compared by the F test. The results showed...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Beef cattle; Polymorphisms; Candidate gene; Growth; Carcass.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200015

Maternal effects on the genetic evaluation of Tabapuã beef cattle
Provedor de dados: Genetics and Molecular Biology
Autores: Campêlo,José Elivalto Guimarães; Lopes,Paulo Sávio; Torres,Robledo de Almeida; Silva,Luiz Otávio Campos da; Euclydes,Ricardo Frederico; Araújo,Cláudio Vieira de; Pereira,Carmen Silva.
The aim of this investigation was to study the influence of maternal effects on the genetic evaluation of sire production in Tabapuã beef cattle. Single and multiple trait analyses were done with adjusted animal weights at 120, 240 and 420 days of age. Antagonism was observed between additive direct and maternal genetic effects, with the maternal effect being higher until weaning. The inclusion of maternal effects in the models removed part of the additive variance only in single trait analyses and resulted in smaller means and standard deviations for the sire breeding values. The use of maternal effect associated with single or multiple traits may affect sire ranking. The contradictory results of the single and multiple trait analyses for additive direct...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Additive direct effects; Beef cattle; Genetic parameters; Growth; Maternal effects.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000400009

Growth, yield, nutrient accumulation and export and thermal sum of Italian zucchini
Provedor de dados: Horticultura Brasileira
Autores: Purquerio,Luis Felipe V; Mattar,Gabriel S; Duart,Adriana M; Moraes,Carolina C de; Araújo,Humberto S; Santos,Fabrício Franco dos.
ABSTRACT Studies on plant nutrition are essential for a correct fertilizer management, improving yield and quality of the product, and it also may contribute for an updating recommendation. The aim of this study was to evaluate growth, nutrient accumulation and export, thermal sum and yield of zucchini cultivar Corona F1. The experiment was carried out from August 8 to October 25, 2013, in Santo Antônio de Posse, São Paulo State. At the end of the research, 84 days after transplanting (DAT), we observed 95 cm average height with 36 leaves and 45.8 t ha-1 maximum yield. The nutrient accumulation, in g plant-1, was: N (14.2) &gt; K (9.3) &gt; Ca (8.0) &gt; Mg (2.5) &gt; S (1.2) &gt; P (0.9) and in mg plant-1, Mn (49.3) &gt; Fe (34.9) &gt; Zn (19.6) &gt; B...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbita pepo; Growth; Plant nutrition; Horticulture; Sustainability.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000200221

Initial development of lettuce in vermicompost at higher trichoderma doses
Provedor de dados: Horticultura Brasileira
Autores: Wiethan,Maria MS; Bortolin,Gabriel S; Pinto,Renata S; Silva,Antonio Carlos F.
ABSTRACT The study aimed to evaluate the initial development, as well as, the chemical characteristics of lettuce plants grown in substrate with high concentrations of bioagent (trichoderma). A completely randomized design with four replicates was used. The treatments, applied to a substrate composed of a blend of vermicompost and commercial substrate, were established by the following doses of the commercial product ICB Nutrissolo Trichoderma: T1) 0.0; T2) 1.0; T3) 2.0; T4) 4.0; T5) 8.0 and T6) 16.0x1011 conidia kg-1 of product. After inoculation, the substrate was placed in trays, where 50 lettuce seeds were sown on each replication. Plants were thinned after emergency stabilization, maintaining ten seedlings per tray. At 28 days after sowing, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Trichoderma spp.; Earthworm; Substrate; Emergence; Growth.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000100077

Morphological, physicochemical and sensory evaluation of celery harvested from early to late maturity
Provedor de dados: Horticultura Brasileira
Autores: Yommi,Alejandra Karina; Di Gerónimo,Natalia Marcela; Carrozzi,Liliana Esther; Quillehauquy,Victoria; Goñi,María Gabriela; Roura,Sara Inés.
The aim of this study was to determine quality changes in petioles of self-blanching celery (Apium graveolens), cv. Golden Boy, harvested at 80, 87, 94, 101, 108, 115, 122 and 129 days after-transplanting (DAT). Total weight (TW), total length (TL), number of leaves per plant (LN) and by plant zone (external, LNZ E; middle, LNZ M; internal, LNZ I), and petiole length (PL) were evaluated at each harvest time. Petioles quality of each zone in the plant were analyzed in terms of: color (hue angle), texture (cutting force), total soluble solids content (TSS) and titratable acidity (TA). The petioles also were sensorially evaluated by descriptive analysis considering visual characteristics (flexibility, hollowness), flavor (typical flavor and odor) and texture...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apium graveolens; Bolting; Growth; Maturity; Senescence; Texture.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000200010

In vitro growth of Brassocattleya orchid hybrid in different concentrations of KNO3, NH4NO3 and benzylaminopurine
Provedor de dados: Horticultura Brasileira
Autores: Cardoso,Jean C; Ono,Elizabeth O.
One of the most important applications of plant tissue culture is mass propagation of ornamental plants. This experiment evaluated the effect of different concentrations of NH4NO3 and KNO3 and BAP on the in vitro growth of orchid hybrid Brassocattleya 'Pastoral'. Seedlings of this orchid hybrid were used as explants and cultivated in medium with mineral salts and vitamins from the MS medium (Murashige &amp;amp; Skoog, 1962), with the macronutrients P, Ca and Mg reduced by half, and with an addition of 25 g L-1 of sucrose, 0.1 g L-1 of myo-inositol and 1.5 g L-1 of activated charcoal. Agar-agar was added (6.5 g L-1) and the pH was adjusted to 5.8. As treatments, four concentrations of the NH4NO3 and KNO3 (2x; 1x; ½ and ¼ MS medium) and three concentrations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tissue culture; Macronutrients; Cytokinins; Multiplication; Growth.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000300017

Adequate timing for heart-of-palm harvesting in King palm
Provedor de dados: Horticultura Brasileira
Autores: Bovi,Marilene L.A.; Saes,Luiz Alberto; Uzzo,Roberta Pierry; Spiering,Sandra H.
Heart-of-palm, palm heart, or "palmito" can be considered as a non-conventional vegetable, largely consumed in Brazil and exported to more than sixty countries. Timing of heart-of-palm harvesting is a critical issue in palmito agribusiness, since it affects yield, quality and costs. A three-year field experiment was utilized to identify the correct timing for king palm heart-of-palm harvesting, from the standpoint of maximizing yield and minimizing growing period. The experimental site was located at Pariqueraçu, Vale do Ribeira, a region where palmito agribusiness has increased recently, due to adequate climatic conditions, low costs and high industry demand. Crop was grown in 2 x 0.75 m spacing, utilizing six-month old seedlings. Growth was assessed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Archontophoenix alexandrae; Palmito; Growth; Yield; Quality.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362001000200008

Энергетический баланс и чистая эффективность роста плоской устрицы (Ostrea edulis L.)
Provedor de dados: IBSS Repository
Autores: Золотницкий, А. П.; Сытник, Н. А.
Исследованы энергетический баланс и чистая эффективность роста (коэффициент К2) плоской устрицы (Ostrea edulis L.) в онтогенезе. Выявлены общие тенденции изменений отдельных его компонентов в процессе роста и распределение энергетических трат на индивидуальную продукцию, энергетический обмен, ассимилированную и потреблённую пищу. Дана характеристика сезонных изменений чистой эффективности роста, связанных с температурой воды и массой тела, динамика которых описывается уравнением множественной регрессии. Показано, что максимальные значения К2 у исследованного вида могут составлять 0.63 – 0.67.
Tipo: Journal Contribution
Palavras-chave: Устрица; Энергетический баланс; Рост; Метаболизм; Ассимиляция; Рацион; Эффективность; Устриця; Енергетичний баланс; Зростання; Метаболізм; Асиміляція; Раціон; Ефективність; Oyster; Energy balance; Growth; Metabolism; Assimilation; Ration; Efficiency.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1919

Рост молоди пиленгаса (Liza haematocheilus) в Азово-Черноморском бассейне
Provedor de dados: IBSS Repository
Autores: Чесалин, М. В.; Чесалина , Т. Н.; Пустоварова, Н. И.
Прослежены  внутригодовые и межгодовые изменения  средних размеров сеголетков и двухлетков пиленгаса в северо-западной части  Азовского моря и в Чёрном море у побережья Севастополя. Интенсивный  рост рыб отмечен с мая по ноябрь. К началу зимы общая длина сеголетков из Азовского моря составила в среднем 8.9 см, масса – 9.15 г. Перезимовавшие годовики имели такую же длину, а их масса уменьшилась до 7.5 г. В Чёрном море поздней осенью сеголетки были длиной 7.7 см, массой – 6.9 г. Размеры двухгодовиков существенно варьировали в разные годы, составив в северо-западной части Азовского море в среднем 26.3 см и 197.4 г, в Чёрном море (возле Севастополя) – 22.9 см и 116.8 г.
Tipo: Journal Contribution
Palavras-chave: Пиленгас; Молодь; Рост; Азовское море; Чёрное море; Haarder; Juvenile fishes; Growth; Sea of Azov; Black Sea.
Ano: 2009
URL: http://repository.ibss.org.ua/dspace/handle/99011/1198

Влияние краткосрочной гипоксии на некоторые ростовые показатели черноморской мидии в условиях дефицита пищи
Provedor de dados: IBSS Repository
Autores: Щербань, С. А.; Вялова, О. Ю.
Исследованы особенности динамики содержания белка, суммарных РНК, ДНК и индекса РНК/ДНК в тканях мидий под влиянием 1- и 4-суточной гипоксии и голодания. Показано, что содержание белка и суммарной РНК в жабрах и гепатопанксреасе снижалось в среднем на 30 - 50 % от контрольного уровня. 4-суточная гипоксия приводила к увеличению в 15,5 раз концентрации аммонийного азота в воде.
Tipo: Journal Contribution
Palavras-chave: Hypoxia; Growth; Hypoxia; Growth; Http://aims.fao.org/aos/agrovoc/c_24472; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 2001
URL: http://repository.ibss.org.ua/dspace/handle/99011/566

Condition factor of Goniopsis cruentata (Crustacea, Brachyura, Grapsidae) from Mundaú/Manguaba estuarine complex, Alagoas, Brazil
Provedor de dados: Iheringia Série Zoologia
Autores: Lira,José J. P. R.; Calado,Tereza C. S.; Araújo,Marina S. L. C.
The condition factor is a parameter which acts as a general indicator of the "well-being" of a species, and it can be obtained through the analysis of width vs. weight relationships. The present work aims to investigate size vs. weight relationship and the condition factor of the crab Goniopsis cruentata (Latreille, 1803). The study area was the Mundaú/Manguaba estuarine complex, Maceió, state of Alagoas, Northeast Brazil. Samplings were monthly accomplished from August 2007 to July 2008. A total of 626 individuals were analyzed, being 309 males and 317 females. Males were larger and heavier than females, what is expected in many brachyuran. The growth was positive allometric to both males (b = 3.42) and females (b = 3.30), not obeying the "cube law". The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crab; Growth; Sexual dimorphism; Mangrove forest; Northeast Brazil.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000300006

Ciclo de vida pós-marsupial e crescimento de Metamysidopsis elongata atlantica (Crustacea, Mysidacea, Mysidae) em cultivo de laboratório
Provedor de dados: Iheringia Série Zoologia
Autores: Gama,Andréa Mara da Silva; Montú,Mônica Adelina; Gusmão,Luiz Felipe M. de.
Metamysidopsis elongata atlantica (Bacescu, 1968) was reared in the laboratory for 45 days at 20±1°C and salinity of 30ppt. Growth curves (von Bertalanffy model) were calculated for both sexes and for each sex. The daily rate of carapace growth was significantly different between females and males (F test, p &lt;0.05). Before the sexual maturity (14 days), the growth rate of females was higher than that of males (females, 0.0457 mm day-1; males, 0.0448 mm day-1). After the maturity (15 to 45 days), these rates decreased similarly for both sexes (females, 0.0203 mm day-1; males, 0.0174mm day-1). The average growth rate was 0.0207mm day-1 over the 45 days. Twelve molts were observed in a period of 60 days. The first five molts occurred up to 14 days old (age...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crustacea; Mysidae; Metamysidopsis; Growth; Molts.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212002000100006

Growth, molt and survival of Palaemonetes argentinus (Decapoda, Caridea) under different light-dark conditions
Provedor de dados: Iheringia Série Zoologia
Autores: Díaz,Ana Cristina; Sousa,Liliana G.; Cuartas,Elena I.; Petriella,Ana María.
Growth, survival and molting rate in Palaemonetes argentinus Nobili, 1901 were compared under different light-dark conditions. During 80 days, 150 immatures of both sexes (initial mean weight 0.09±0.002g), from Los Padres lagoon, Mar del Plata, Argentina, were maintained in aquaria at 19±0.4°C under three light conditions: 0:24, 10:14 and 13:11 (L-D). They were fed daily on an artificial diet (45% proteins, 17.2% lipids, 7% water, 7% ash). Good weight increment was obtained with the three treatments, finding a positive linear correlation between mean weight and time (0:24, r=0.97; 10:14, r=0.99; 13:11, r=0.98). There were no significant differences in the percentage increment in mean weight among the treatments (0:24, 19.3%; 10:14, 29.3% and 13:11, 26.5%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Molt; Photoperiod; Crustacea; Palaemonidae.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212003000300004

Effects of both ecdysone and the acclimation to low temperature, on growth and metabolic rate of juvenile freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae)
Provedor de dados: Iheringia Série Zoologia
Autores: Chaulet,Anouk; Vatnick,Itzick; Rodríguez,Enrique M.
Growth, metabolic rate, and energy reserves of Cherax quadricarinatus (von Martens, 1868) juveniles were evaluated in crayfish acclimated for 16 weeks to either 25ºC (temperature near optimum) or 20ºC (marginal for the species). Additionally, the modulating effect of ecdsyone on acclimation was studied. After 12 weeks of exposure, weight gain of both experimental groups acclimated to 25ºC (control: C25, and ecdysone treated: E25) was significantly higher than that of those groups acclimated to 20ºC (C20 and E20). A total compensation in metabolic rate was seen after acclimation from 25ºC to 20ºC; for both the control group and the group treated with ecdysone. A Q10value significantly higher was only observed in the group acclimated to 20ºC and treated with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy reserves; Growth; Metabolic rate; Q10.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212013000200009

Thermal biology, activity, and population parameters of Cnemidophorus vacariensis (Squamata, Teiidae), a lizard endemic to southern Brazil
Provedor de dados: Iheringia Série Zoologia
Autores: Caruccio,Rodrigo; Vieira,Renata Cardoso; Verrastro,Laura; Machado,Denise Mello.
We investigated the following aspects of the biology of a population of Cnemidophorus vacariensis Feltrim &amp;amp; Lema, 2000 during the four seasons: thermal biology, relationship with the thermal environment, daily and seasonal activity, population structure and growth rate. Cnemidophorus vacariensis is restricted to rocky outcrops of the "campos de cima da serra" grasslands on the Araucaria Plateau, southern Brazil, and is currently listed as regionally and nationally threatened with extinction. Data were collected from October 2004 through September 2007 in the state of Rio Grande do Sul. Sampling was conducted randomly from 08:00 a.m. to 6:00 p.m. The capture-mark-recapture method was employed. The lizards were captured by hand, and their cloacal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body temperature; Growth; Density-biomass; Temperate region; Tigmothermy.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000300002

Width-weight relationship and condition factor of Ucides cordatus (Crustacea, Decapoda, Ucididae) at tropical mangroves of Northeast Brazil
Provedor de dados: Iheringia Série Zoologia
Autores: Araújo,Marina S.L.C.; Castiglioni,Daniela S.; Coelho,Petrônio A.
The present contribution aims at evaluating the carapace width vs. humid weight relationship and the condition factor of Ucides cordatus (Linnaeus, 1763), in the mangrove forests of the Ariquindá and Mamucabas rivers, state of Pernambuco, Brazil. These two close areas present similar characteristics of vegetation and substrate, but exhibit different degrees of environmental conservation: the Ariquindá River is the preserved area, considered one of the last non-polluted of Pernambuco, while the Mamucabas River suffers impacts from damming, deforestation and deposition of waste. A total of 1,298 individuals of U. cordatus were collected. Males were larger and heavier than females, what is commonly observed in Brachyura. Ucides cordatus showed allometric...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric constant; Carapace width; Caranguejo-uçá; Growth; Humid weight.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000300005

Influencia da altitude no tamanho de sementes e no crescimento de mudas de Eucalyptus urophylla S.T. Blake.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: MOURA, V. P. G.
bitstream/item/83837/1/bolpd-17.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Tamanho da semente; Cuttings; Growth; Seed size.; Altitude; Crescimento; Eucalyptus Urophylla; Eucalipto; Muda.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549444

Avaliacao agronomica da mangabeira.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: GUERRA, A. F.; SALVIANO, A.; GOMES, A. C.
bitstream/CPAC-2009/24130/1/p2002_09.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: ECFLOR300; Fruta nativa; Fruit; Growth; Fertilization; Indigenous organisms; Brasil.; Adubação; Cerrado; Crescimento; Hancornia Speciosa; Mangaba.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567436

Influência de meios de cultura, pH e do regime luminoso no crescimento e esporulação de Colletotrichum corchorum Ikata &amp; Tana.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: DUARTE, M. de L. R.; NUNES, A. M. L.; ALBUQUERQUE, F. C. de.
bitstream/item/31916/1/CPATU-BP48.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cenoura-agar; Batata-sucrose-agar; Laboratorio de fitopatologia do CPATU; Belem; Pará; Brasil; Growth; Carrot root agar; Potato sucrose.; Colletotrichum Corchorum; Crescimento; Corchorus Capsularis; Esporulação; Juta.; Amazonia; Jute; Sporulation.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382300

Comportamento das espécies florestais estabelecidas nos Sistemas 2, 3 e 4.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: LIMA, R. M. B. de.
No campo experimental do CPAA foram plantadas algumas especies florestais como componentes dos sistemas: II- urucum x castanha-do-brasil x cupuacu x pupunha; III- parica x seringueira x coqueiro x citros; IV- seringueira x andiroba x mogno x parica, utilizando-se nas entrelinhas mandioca e pueraria como cobertura de solo (Sistema II); mandioca, milho, caupi e pueraria como cobertura (Sistema III), ambos sistemas recebendo adubacao recomendada e inoculacao com micorriza. Os tratamentos foram distribuidos em blocos ao acaso com cinco repeticoes. As plantas, nos diferentes sistemas, foram avaliadas a cada seis meses no primeiro ano, e, a partir do segundo ano, em intervalo de doze meses, quanto a altura total (m), diametro a altura do peito-DAP (cm) e...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Agrofloresta; Brasil; Amazonas; Agroforesty; Growth; Yield; Bertholletia Excelsa; Carapa Guianensis; Crescimento; Cultivo Multiplo; Essência Florestal; Hevea Brasiliensis; Performance; Schizolobium Amazonicum; Swietenia Macrophylla; Forest trees; Multiple cropping.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667455

Crescimento de mudas de Astronium flaxinifolium (goncalo-alves) em substratos com composto organico.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: PARRON, L. M.; CAUS, J. F.
Visando a producao de mudas de qualidade para recuperacao de Matas de Galeria do Cerrado, o objetivo deste trabalho foi avaliar o crescimento de mudas da especie nativa Astronium fraxinifolium (goncalo-alves), em diferentes substratos com composto organico. Um delineamento inteiramente casualizado, em esquema fatorial 8x2, foi conduzido com oito substratos:[1) composto; 2) composto + terra (1:1); 3) composto + terra (2:1); 4) composto + terra + vermiculita (2:1:1); 5) composto + terra + vermiculita + carvao (2:1:1:1) 6) composto + terra + carvao + areia (1:1:1:1); 7) composto + terra + vermiculita + carvao + areia+ casca (2:2:2:1:1:1); 8) composto + terra + casca (2:1:1)] e presenca e ausencia de adubacao com p205 e CaCO3, em viveiro com 12 plantas por...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Astronium flaxinifolium; Substrato; Cuttings; Growth; Riparian vegetation.; Composto Orgânico; Crescimento; Cerrado; Mata Ciliar; Muda.; Organic compounds.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546465

Inoculação de fungos endomicorrízicos em plântulas de acerola (Malpighia glabra L.).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: CHU, E. Y.
bitstream/item/32748/1/CPATU-BP149.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Absorção de nutriente; Colonização das raízes; Growth; Root colonization; Inoculation.; Acerola; Crescimento; Fungo; Inoculação; Malpighia Glabra; Micorriza.; Fungi; Nutrient uptake.; Mycorrhizae.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379043

Teste de espécies/procedências de pinus no planalto do Tapajós, Pará.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: VIANA, L. M.; YARED, J. A. G.; KANASHIRO, M.
bitstream/item/42018/1/Boletim-Pesquisa-105-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Adaptação; Produção volumetrica; Belterra; Pará; Brasil; Adaptation; Growth; Volumetric production.; Crescimento; Pinheiro.; Amazonia; Pinus.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381023

Efeito do rejeito de mineração de níquel na germinação e crescimento de stylosanthes guianensis (aubl.) Sw. (Leguminosae) (2009).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: FREIRE, I. de S.; AGEADO, J. C.; MORAES, A. S.; ARAGÃO, T. P.; MUNIZ, D. H. de F.; MALAQUIAS, J. V.; SILVA, J. C. S.; ANDRADE, L. R. M. de; OLIVEIRA-FILHO, E. C. de; AQUINO, F. de G.
bitstream/item/78160/1/p2009-048.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Recuperação ambiental; Forrageira; Forages; Nickel mining waste; Soil contamination; Growth; Environmental regeneration.; Environmental degradation; Germination.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/737091

Crescimento e composição química das gramíneas Brachiaria humidicola, Andropogon gayanus cv.Planaltina e Setaria sphacelata cv. Nandi em Porto Velho-RO.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: GONÇALVES, C. A.
Experimento conduzido em Porto Velho-RO, em Latossolo Amarelo, textura pesada e baixa fertilidade, com o objetivo de verificar a variacao estacional de producao de gramineas utilizadas em Rondonia. O delineamento foi em blocos casualizados com fatorial completo (3 x 6 x 4) e tres repeticoes, constituindo-se os trabalhos de: tres gramineas(Brachiaria humidicola, Andropogon gayanus cv Planaltina e Setaria sphacelata cv Nandi), seis crescimentos (I-abr./maio, II-jun./jul., III-ago./set., IV-out./nov., V-dez./jan., VI-fev./mar.), quatro idades (21, 35, 49 e 63 dias). As pastagens de Andropogon gayanus e Setaria apresentam boas condicoes de serem utilizadas na regiao com idade em torno de 49 dias, enquanto que, com a B. humidicola (Quicuio da Amazonia), o...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Brasil; Rondonia; Porto Velho; Growth; Chemistry composition.; Andropogon Gayanus; Brachiaria Humidicola; Composição Química; Crescimento; Gramínea; Setaria Sphacelata.; Brazil; Forage grasses.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697950

História e uso do silicato de sódio na agricultura.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: LIMA FILHO, O. F. de.
bitstream/item/125220/1/LIVRO-SILICATO-2009-online.pdf
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Agroecologia; Estresse; Growth; Nutrient; Plant; Fertilizer; Organic agriculture; Agro-ecology; Disease.; Adubação; Agricultura Orgânica; Crescimento; Doença; Fisiologia; Nutriente; Planta; Praga; Silício; Solo.; Physiology; Pests; Silicon; Soil.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/696871

Seringueira: crescimento em perímetro do caule.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: MORAES, V. H. de F.
Medidas em perimetro do caule e adubacao da seringueira.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Agrofloresta; Brasil; Amazonas; Rubber tree; Species; Growth; Fertilizers application; Adubação; Crescimento; Cultivo Multiplo; Espécie; Hevea; Seringueira; Agroforestry; Multiple cropping.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667460

Defasagem entre as produtividades real e potencial do algodoeiro herbáceo: limitações morfológicas, fisiológicas e ambientais.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: BELTRÃO, N. E. de M.; AZEVEDO, D. M. P. de.
Fatores limitantes relacionados com a morfologia, a organografia e arquiteture do algodoeiro herbaceo; fatores limitantes relacionados com -a fisiologia e a bioquimica da planta do algodoeiro herbaceo; fatores limitantes relacionados com as condicoes do ambiente; consideracoes holoticas envolvendo fatores da planta e do ambiente.
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Herbaceo; Taxas de Crescimento; Cultura; Fotorrespiracao; Trofofilos; Dossel; Balanco; Assimilado; Limitacao incontrolavel; Desenvolvimento; Brasil; Paraiba; Annual cotton; Production; Growth rate; Reespiration; Assimilation; Crop; Levll; Not controllable; Limitation; Growth; Deelopment.; Algodão; Bioquímica; Crescimento; Fotossíntese; Fisiologia Vegetal; Gossypium Hirsutum; Metabolismo; Respiração.; Produção; Biochemistry; Canopy; Leaves; Physiology.; Photosynthesis; Photorespiration; Metabolism.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/264934

Ensaios de procedências de Acacia mangium Willd., no planalto do Tapajós, Pará.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: YARED, J. A. G.; VIANA, L. M.; KANASHIRO, M.
bitstream/item/42022/1/Boletim-Pesquisa-107-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Especie florestal; Adaptação; Campo Experimental de Belterra; Brasil; Forest species; Growth; Adaptation.; Crescimento.; Acacia mangium; Amazonia.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381088

Características relativas ao crescimento em meio de cultura e a morfologia de colônias de "rizóbio".
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: MARTINS, L. M. V.; XAVIER, G. R.; NEVES, M. C. P.; RUMJANEK, N. G.
Caracterização morfológica dos isolados. Tempo de crescimento. Alteração no pH do meio de cultura. Diâmetro das colônias. Transparência e forma das colônias. Superfície das colônias. Produção, consistência e aparência do muco.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Morfologia; Growth; Morphology; Production.; Crescimento; Meio de Cultura; Produção; Rhizobium.; Culture media.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/623573

Predicao do crescimento volumetrico de Eucalyptus grandis.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: GUIMARAES, D. P.
bitstream/item/98710/1/bolpd-09.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Espirito Santo; Brasil; Minas Gerais; Growth; Volume tables.; Crescimento; Cerrado; Eucalyptus Grandis; Eucalipto; Volume.; Brazil.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549438

Colistina e zinco bacitracina como aditivos para leitoes em recria.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: PACHECO, C. R. V. M.; GOMES, P. C.; SOBESTIANSKY, J.; BRITO, J. R. F.; FORMIGA, D. das N.
bitstream/item/68044/1/DMeu-DiscoCNPSA-PESQ.-AND.-3-80CNPSA-PESQ.-AND.-3-80.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Colistina; Zinco bacitracina; Piglet; Ration; Growth; Zinc bacitracin.; Crescimento; Leitão; Nutrição; Ração.; Colistin; Nutrition.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/434786

Efeito da inoculação de fungos micorrízicos vesicular-arbusculares em urucuzeiro (Bixa orellana L.).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: CHU, E. Y.; KATO, O. R.
bitstream/item/32553/1/CPATU-BP128.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Urucu; Annatto; Mycorrhize; Growth; Inoculation; Plant.; Absorção de Nutrientes; Bixa Orellana; Crescimento; Inoculação; Micorriza; Planta.; Nutrient uptake.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381258

Manejo integrado de plantas daninhas.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: FONTES, J. R. A.; SHIRATSUCHI, L. S.; NEVES, J. L.; JÚLIO, L. de; SODRÉ FILHO, J.
ABSTRACT: Integrated weed management (IWM) is essential to sustainable agricultural production by reducing costs and nega tive environmental impact. Weeds are not necessarily undesirable and, in certain situations, they are more beneficial than harmful, contributing to integration of control methods. It has been demonstrated that crops coexist with weeds in certain growth phases of both without yield damage. This change of traditional approach, however, is not always easy to implement due to the concept that weeds need to be eliminated of the agricultural environment at any cost. A form to promote change in attitude is to deliver detailed, simple and objective information to farmers. Researchers have accumulated information be delivered by various means....
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Planta daninha; Growth; Reroduction.; Controle Biológico; Controle Químico; Crescimento; Reprodução.; Chemical control; Biological control; Weeds.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567569

Analise genetica de caracterisiticas de crescimento em rebanhos nelore da regiao centro-oeste do Brasil.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: DIAS, D. S. de O.; TONHATI, H.; MAGNABOSCO, C. de U.; FARIA, C. U. de; LOS REYES, A. de; LOBO, R. B.; DIAS, M. J.
bitstream/CPAC-2009/24353/1/p2002_07.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: PABOV400; Growth; Genetic parameters.; Crescimento; Gado de Corte; Genética Animal; Parâmetro Genético.; Beef cattle; Genetics.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567658

Efeito de microorganismos benéficos no crescimento e nutrição mineral de mudas de tomate.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: YING, E. C.; BENCHIMOL, R. L.; MAKI, H. J. O.
bitstream/item/57305/1/CPATU-PA192.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Absorção de nutriente; Microorganismo; Controle de doença; Susbtrato de cultura; Pará; Brasil; Tomatos; Seedling; Growth; Nutient uptake.; Tomate.; Amazonia; Culture media; Disease control; Microorganisms.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375199

Modelos matemáticos para o cálculo da área dos foliólos de guaranazeiro.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: REIS, G. G. dos; COSTA, M. P. da; REGAZZI, A. J.; MULLER, C. H.; CARVALHO, J. E. U. de; OLIVEIRA, R. P. de.
bitstream/item/197889/1/FL00665.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Paulinia cupana; Belém; Pará; Brasil; Growth; Plant; Mathematical model; Crescimento; Guaraná; Modelo Matemático; Pesquisa; Planta; Amazonia; Research.
Ano: 1977
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374641

Aspectos da fenologia de Cordia goeldiana Huber e suas relações com alguns parâmetros climáticos.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: MONTAGNER, L. H.; YARED, J. A. G.
bitstream/item/31921/1/CPATU-BP54.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Freijo; Periodicidade; Queda de Folha; Campo Experimental de Belterra; Santarem; Pará; Brasil; Brazilian walnut; Fenology; Growth; Frutification; Leaf fall.; Crescimento; Cordia Goeldiana; Fenologia; Frutificação.; Floração; Amazonia; Flow; Periodicity.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381165

Desempenho de clones de seringueira sob diferentes sistemas de sangria, em condicao de cerrado dos municipios de Barro Alto e Goianesia.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: PEREIRA, A. V.; PEREIRA, E. B. C.; BENESI, J. F. C.
bitstream/CPAC-2009/24144/1/p2002_25.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cultura perene Rubber yield; Tapping systems; Growth; Rubber crops.; Cerrado; Clone; Crescimento; Hevea Brasiliensis; Melhoramento Genético Vegetal; Planta Produtora de Borracha; Seringueira.; Sangria; Plant breeding.; Perennials.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567451

Freijó em sistemas agroflorestais.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: BRIENZA JUNIOR, S.
bitstream/item/35057/1/CircTec38.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Freijo; Sistema agroflorestal; Taungya; Codia alliodora; Brasil; Brazilian walnut; Plantation; Agroforestry system; Maize; Mahogany; Growth; Crab tree.; Banana; Andiroba; Arroz; Crescimento; Cordia Goeldiana; Mandioca; Milho; Mogno; Plantio; Swietenia Macrophylla.; Amazonia; Cassava; Rice.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381965

Curva de crescimento de frutos de coqueiro-anão (Cocos nucifera L. Var. nana).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: ARAGÃO, W. M.; CRUZ, E. M. de O.
bitstream/item/147651/1/Curva-de-crescimento0001.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Coqueiro anão; Tabuleiro costeiro; Brasil; Sergipe; Neopolis; Dwarf coconut; Growth; Coastal tablelands.; Coco; Cocos Nucifera; Crescimento.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/359847

Respostas de crescimento da seringueira a diferentes doses de fertilizantes.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: PEREIRA, A. V.; BUENO, N.; PEREIRA, E. B. C.
Avaliacao dos efeitos de diferentes doses de fertilizantes nitrogenados, fosfatados, potassicos e magnesianos sobre o desenvolvimento inicial de um seringal cultivado em Latossolo Amarelo textura muito argilosa, utilizando-se o clone Fx 3899.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brasil; Amazonas; Rubber tree; Growth; Fertilizers application.; Adubação; Crescimento; Hevea Brasiliensis; Npk; Seringueira; Solo.; Soil.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/665365

Estudo do mecanismo de hiperacumulação de níquel em plantas nativas do Cerrado (2009).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: PAES LEME, V. B.; CORDEIRO, M. C. R.; NAGATA, T.; OLIVEIRA-FILHO, E. C. de; AQUINO, F. de G.; MIRANDA, Z. de J. G.; FRAGOSO, R. da R.; SILVA, M. S.; BARROS, L. M. G.; ALMEIDA, J.; ANDRADE, L. R. M. de.
bitstream/item/78169/1/p2009-056.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Planta nativa; Indigenuous organisms; Nickel mining waste; Soil contamination; Growth; Environmental regeneration.; Cerrado; Metal Pesado; Níquel.; Environmental degradation.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/737103

Crescimento de freijó (Cordia goeldiana Huber) em plantios experimentais.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: CARPANEZZI, A. A.; YARED, J. A. G.
bitstream/item/30794/1/CPATU-BP26.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Freijo; Recru; Linha; Luz; Efeito; Floresta Nacional do Tapajos; Belterra; Santarém; Pará; Brasil; Brazilian walnut; Growth; Effect; Plantation; Line.; Crescimento; Cordia Goeldiana; Plantio; Química; Solo.; Amazonia; Chemistry; Light; Soil.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379784

Influência da inoculação com fungos micorrízicos e níveis crescentes de P no crescimento inicial de Taxi dos campos (Sclerolobium paniculatum Vogel).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: TELES, C. S.; SILVA, M. F. da; SOUZA, F. A. de; FRANCO, A. A.
bitstream/CNPAB-2010/27163/1/cot034.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Espécie florestal; P; Growth; Inoculation.; Crescimento; Essência Florestal; Fungo; Fósforo; Inoculação; Micorriza Vesicular Arbuscular; Sclerolobium Paniculatum; Taxi Branco.; Fungi; Phosphorus; Vesicular arbuscular mycorrhizae.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/623871

Uso do simulador DECI para predizer a associação entre o peso à maturidade e eficiência reprodutiva em um rebanho seleção da raça Nelore (2007).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: PAULA, E. J. H. de; MAGNABOSCO, C. de U.; SAUERESSIG, M. G.; VIU, M. A. de O.; LOPES, D. T.; FERRAZ, H. T.
bitstream/item/78052/1/p2007-01.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Growth; Simulation.; Crescimento; Gado de Corte; Simulação.; Beef cattle.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570891

Metodologia para avaliacao de forrageiras.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: COMASTRI FILHO, J. A.; POTT, A.
O presente "modus operandi" complementa a Ficha de Avaliacao de Germoplasma de Forrageiras, especialmente no que se refere a criterios subjetivos, para padronizacao das observacoes na UEPAE de Corumba/EMBRAPA. Na ficha de campo foram englobados todos os descritores minimos do CENARGEN/EMBRAPA, aprovados na reuniao dos Bancos Ativos de Germoplasma de Forrageiras em julho/1980. Os descritores abordados sao: habito de crescimento, posicao das gemas de rebrota, estabelecimento, altura de planta, rendimento, persistencia, tolerancia a seca e ao alagamento, tolerancia a pragas e molestias, capacidade de rebrota, florescimento e sementes.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Avaliacao; Forrageira; Descritores; Florescimento; Evaluation; Descriptors; Growth; Seed.; Crescimento; Germoplasma; Planta; Rebrota; Semente.; Forage; Flowering; Regrowth.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787805

Desempenho de clones de seringueira sob diferentes sistemas de sangria.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: PEREIRA, A. V.; PEREIRA, E. B. C.; BENESI, J. F. C.
Este trabalho teve como objetivo avaliar o crescimento e a producao da borracha de clones seringueira [Havea brasiliensis ( Wild. Ex Adr. De Juss.) Muell. Arg.] sob diferentes sistemas de sangria, em condição de Cerrado dos Municipios de Barro Alto Goianesia no Estado de Goais. O plantio foi feito em fevereiro de 1992, no espacamento de 8,0 x 2,5 m (500 plantas/ha), em talhoes de 8 a 10 hectares para cada um dos clones RRIM 600, GT 1, PB 217, PB 235, PR 107 e PR 255 os quais receberam as mesmas praticas de manejo. Aos oito anos de idade, foram feitas as seguintes avaliacoes: estande final; circunferencia do caule a 1,20 m do solo; porcentagens de plantas aptas a sangria; producao de borracha acumulada na caneca pesada mensalmente; incidencia de seca de...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Sandria; Growth; Tapping systems; Rubber yield; Cultura perene: Seringueira.; Clone; Cerrado; Crescimento; Hevea Brasiliensis; Planta Produtora de Borracha; Seringueira.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567087

Ensaio de espécies florestais sob duas diferentes condições ecológicas.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: BRIENZA JUNIOR, S.
bitstream/item/60548/1/CPATU-PA17.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Manejo de solo; Quaruba verdadeira; Growth; Survival; Plant soil relations.; Crescimento; Essência Florestal; Ipê; Mogno; Pinheiro; Pinus Caribaea; Relação Solo-Planta; Sobrevivência; Swietenia Macrophylla; Tabebuia Caraiba; Vochysia Maxima.; Forest trees; Soil management.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377570

Sementes de palma / dendê (Elaeis guineensis, Jacq.).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: BARCELOS, E.; SANTOS, J. A. dos.
Mercado de óleo de dendê. Pesquisas com dendê na Embrapa. Produção de sementes. Características agronômicas das sementes de dendê produzidas pela Embrapa. Produção de cachos e taxa de extração. Resistência a doenças.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Brasil; Amazonas; Manaus; Agronomic characters; Growth; Oil palms; Cacho; Características Agronômicas; Crescimento; Dendê; Elaeis Guineensis; Extração; Óleo Vegetal; Pesquisa; Semente; Research; Seeds.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/671351

Estabelecimento de progênies de jatobá (Hymenaea spp.) em plantio puro no Cerrado.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: SANO, S. M.; FONSECA, C. E. L. da.
RESUMO: O fruto de jatobá (Hymenaea spp.), colhido de maneira extrativista, é comercializado no Centro-Oeste do Brasil. O endocarpo farináceo é usado como alimento, a casca do fruto e a resina, retirada do caule, para tratamento de problemas respiratórios. Várias espécies compõem o gênero Hymenaea cujos frutos são de tamanho e de forma diferentes, coloração, aroma e saber de farinha também variáveis. Para avaliar o estabelecimento em condições de plantio puro, sementes de sete matrizes de jatobá foram coletadas no Município de Formosa, GO. As mudas obtidas separadamente, formando sete progênies, foram plantadas no campo. O desenho experimental foi em anéis hexagonais com as plantas espaçadas de 5 cm. Cada progênie foi mantida na posição fixa em um ponto do...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Fruta nativa; Indigenous organisms; Growth; Survival.; Altura; Cerrado; Crescimento; Hymenaea Courbaril; Jatobá; Leguminosae; Sobrevivência.; Height.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568944

Correlation between perkinsosis and growth in clams Ruditapes spp.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dang, Cecile; De Montaudouin, Xavier; Binias, Cindy; Salvo, Flora; Caill-milly, Nathalie; Bald, Juan; Soudant, Philippe.
Perkinsosis is one of the most widespread diseases affecting commercially important species of molluscs globally. We examined the impact of Perkinsus spp. on shell growth at the individual scale in 2 clam species: Ruditapes decussatus from Mundaka Estuary (Spain) and R. philippinarum from Arcachon Bay (France). At Arcachon, 2 contrasting sites in terms of environment and Perkinsus olseni presence were chosen: Arguin (disease-free) and Ile aux Oiseaux (infected site). We monitored the dynamics of perkinsosis over the course of the experiment at Mundaka and Ile aux Oiseaux. Prevalences were high (&gt;70%), and intensities were around 10(5) cells g(-1) wet gills at Ile aux Oiseaux, and 10(6) cells g(-1) at Mundaka. No significant differences in prevalence or...
Tipo: Text
Palavras-chave: Clams; Perkinsus spp.; Perkinsus olseni; Ruditapes philippinarum; Ruditapes decussatus; Growth.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00166/27733/25951.pdf

Mortalité estivale de l'huître creuse Crassostrea gigas dans le bassin de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Couty, Angélique.
The Japan oyster: Crassostrea gigas have been imported on the french coasts in the seventies and from this time it adapted to this environment. Since, it became the main oyster producted in France. But ,since twenty years C. gigas presents an anormaly and important mortality eah year in the period of summer. The syndrome known as summer mortality, appears particulary in mid-june. This mortality can affected 50% of the culture. Many studies have brought elements in the comprehension of the condition of apparition of this mortalilities. Temperature seems to play an important rule with reproductive maturation. But also, the deep ofwater could be associated to this mass mortality. The study began in march 2003 and characterize more precisely the summer...
Tipo: Text
Palavras-chave: Crassostrea gigas; Mortalité estivale; Croissance; Maturation; Environnement; Crassostrea gigas; Summer mortality; Growth; Maturation; Environment.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00306/41767/40980.pdf

Amelioration de la forme et de la qualite de l'huitre Crassostrea gigas Thunberg dans les claires de Marennes-Oleron.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deslous-paoli, Jean-marc; Zanette, Yvan; Heral, Maurice; Masse, Henri; Garnier, Jacqueline.
The breeding of Pacific oysters Crassostra gigas, in non tidal ponds, before commercialization, brings about an improvement of the shell and of the quantity and quality of the tissues. In fact, the Berthome's indice (1978) moves from 1.36 in June to 0.68 December, and the density of the shell increases in the same time from 1.79 to 1.98. On the other hand, the percentage of tissues in the oyster is 12.4% at the end of gametogenesis and more than 9% at the end of breeding. The dry tissues are composed of 10.3 of ash, 40.3% of proteins, 12.6% of lipids and 9% of carbohydrate. 95% of the carbohydrate are glycogen. The resulting energetic values are measured to 5.10 cal-mg super(-1) of dry tissues ash free.
Tipo: Text
Palavras-chave: Crassostrea gigas; Tissues; Biochemical composition; Shells; Growth; Oyster culture.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/publication-1892.pdf

The planktonic stages of the salmon louse ( Lepeophtheirus salmonis) are tolerant of end-of-century p CO2 concentrations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thompson, Cameron R.s.; Fields, David M.; Bjelland, Reidun M.; Chan, Vera Bin San; Durif, Caroline M.f.; Mount, Andrew; Runge, Jeffrey A.; Shema, Steven D.; Skiftesvik, Anne Berit; Browman, Howard I.
The copepod Lepeophtheirus salmonis is an obligate ectoparasite of salmonids. Salmon lice are major pests in salmon aquaculture and due to its economic impact Lepeoph- theirus salmonis is one of the most well studied species of marine parasite. However, there is limited understanding of how increased concentration of pCO2 associated with ocean acidification will impact host-parasite relationships. We investigated the effects of increased pCO2 on growth and metabolic rates in the planktonic stages, rearing L. salmonis from eggs to 12 days post hatch copepodids under three treatment levels: Control (416 matm), Mid (747 matm), and High (942 matm). The pCO2 treatment had a significant effect on oxygen consumption rate with the High treatment animals exhibiting...
Tipo: Text
Palavras-chave: Salmon lice; Copepod; Ocean acidification; Parasite; Energetics; Metabolism; Growth; Lipid; Lepeophtheirus salmonis; Aquaculture.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/69998/67911.pdf

Influence de l'azote et du phosphore sur la croissance et la toxicité de Prorocentrum lima (Ehrenberg) Dodge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morlaix, Martine; Lassus, Patrick.
Very few attempts have been made in order to investigate the role of nutrients on cellular growth and toxin production in dinoflagellates associated with DSP (Diarrhetic Shellfish Poison). Some preliminary results are presented here, aiming at a better knowledge of inorganic nitrogen and organic phosphorus effects upon division rate and toxin content of Prorocentrum lima (PL2V spanish strain). Nitrogen have a positive effect on growth rate, up to a threshold value of 880muM.l-1. Above this threshold the rate decreases. There is no effect on toxin content since okadaic acid and DTX1 cell contents remain low (4.8 +/- 0.5 pg.cell.-1) and steady. Phosphorus effect upon division rate follows a non-linear relationship, whereas cellular toxic content is inversely...
Tipo: Text
Palavras-chave: Croissance; Toxicité; Concentration chimique; Division cellulaire; Production; Espagne; Phosphore; Azote; Europe; Nutriment; Milieu marin; Zone côtière; Ecotoxicologie; Pyrrophycophyta; Algae; Thallophyta; Okadaïque acide; Prorocentrum lima; Growth; Toxicity; Chemical concentration; Cell division; Production; Spain; Phosphorus; Nitrogen; Europe; Nutrient; Marine environment; Coastal zone; Ecotoxicology; Pyrrophycophyta; Algae; Thallophyta.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00133/24469/22483.pdf

Contribution a l'etude de la biologie du crabe-tourteau Cancer pagurus sur les cotes de Bretagne sud.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Foll, Anne.
The study of the crab Cancer pagurus , along the Brittany coast, has revealed new information about its movements, growth and reproduction. The 1439 crab tagging has been effected either on land using the Edwards technique "suture-tag" or onboard using a similar technique to the Gundersen method of "toggle-tag". The results confirm that males are relatively sedentary, the females migrate more. To estimate growth, the author used the "capture-recapture" method and the results from crab rearing. It appeared that the molt increment is not constant and generally, so the molt frequency, it percentage decreases when the size increases.
Tipo: Text
Palavras-chave: Marine crustaceans; Sexual reproduction; Tagging; Growth; Migrations.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1785.pdf

Larval rearing and weaning of seabass, Lates calcarifer (Block), on experimental compounded diets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fuchs, Jacques; Nedelec, Georges.
Larval rearing trials of seabass larvae, either imported from Singapore or obtained from the captive broodstock of IFREMER/C.O.P. at Tahiti, were carried out since 1987, by testing different technologies originally used in South East Asia (green-water culture, sequential water changes) or developed by IFREMER for other species (clear water system, preys enrichment, continuous water renewal).
Tipo: Text
Palavras-chave: Lates calcarifer; Diets; Survival; Fish larvae; Brood stocks; Mortality; Pellet feeds; Artificial feeding; Swimming; Abnormalities; Swim bladder; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1433.pdf

Le déterminisme sexuel de l'huître crassostrea gigas : du phénotype aux facteurs moléculaires sous-jacents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Broquard, Coralie.
Knowledge about the mode of reproduction and the sex determination of the cupped oyster Crassostrea gigas remains limited. As a sequential hermaphroditic species, sex determination takes place several times during its lifetime. As part of this thesis, the sexual phenotypes of the first 6 years of life of oysters were identified in two cohorts. Thus, the sex ratio was biased towards females from the first sexual maturity, as well as for all subsequent years. After six years of sexing, 42%, 32%, 19%, 5%, 1% and 0.1% of oysters showed 0, 1, 2, 2, 3, 4 and 5 sex changes. The frequency of sex changes also decreased with age (34% between years 1-2 to 9% between years 5-6). This thesis work has also sought to determine the influence of sex and sex change on the...
Tipo: Text
Palavras-chave: Déterminisme sexuel; Facteurs moléculaires; Sex determination; Hermaphroditism; Growth; Molecular factors; C. gigas.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00692/80422/83558.pdf

Effets de l'apport de phytoplancton (Skeletonema costatum) sur la croissance et les variations de la composition biochimique de la palourde japonaise Ruditapes philippinarum cultivée en marais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baud, Jean-pierre; Haure, Joel; Garnier, Jacqueline.
A bulk production of phytoplankton (Skelelonema costatum) has been obtained in concrete tanks from saline groundwater. This was used in various concentrations to feed an intensive cultivation of the Manila clam (Ruditapes philippinarum) in ponds. No difference was observed in growth rates of molluscs, with food concentrations between 31 to 126 µg/l Chl a. However, the growth rates obtained from March to November with a food supplement were 1.5 times higher than those observed in the traditional, extensive cultivation. The biomass doubled and the increase in flesh dry weight was 2.5 times higher. The condition index reached a value of 100 in the intensive cultivation. During growth, the proximate composition analysis revealed that the lipid and carbohydrate...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Skeletonema costatum; Elevage intensif; Claire; Croissance; Composition biochimique; Ruditapes philippinarum; Skeletonema costatum; Intensive rearing; Pond; Growth; Biochemical changes.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00039/14980/12307.pdf

Unsuspected intraspecific variability in the toxin production, growth and morphology of the dinoflagellate Alexandrium pacificum R.W. Litaker (Group IV) blooming in a South Western Mediterranean marine ecosystem, Annaba Bay (Algeria)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hadjadji, Imen; Laabir, Mohamed; Frihi, Hocine; Collos, Yves; Shao, Zhao Jun; Berrebi, Patrick; Abadie, Eric; Amzil, Zouher; Chomérat, Nicolas; Rolland, Jean-luc; Rieuvilleneuve, Fabien; Masseret, Estelle.
Physiological plasticity gives HABs species the ability to respond to variations in the surrounding environment. The aim of this study was to examine morphological and physiological variability in Alexandrium pacificum R.W. Litaker (Group IV) (former Alexandrium catenella) blooming in Annaba bay, Algeria. Monoclonal cultures of up to 30 strains of this neurotoxic dinoflagellate were established by the germination of single resting cysts from the surface sediment of this southern Mediterranean marine ecosystem. Ribotyping confirmed formally for the first time that A. pacificum is developing in Eastern Algerian waters. Toxin analyses of A. pacificum strains revealed substantial intraspecific variability in both the profile and toxin amount. However, the...
Tipo: Text
Palavras-chave: Alexandrium pacificum; Mediterranean; Toxin profile; Growth; Intraspecific variability.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00624/73620/73598.pdf

Selective breeding to improve resistance against summer mortality in the Pacific oyster Crassostrea gigas : results after 3 generations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boudry, Pierre; Degremont, Lionel; Bedier, Edouard; Samain, Jean-francois.
Summer mortality of adults and juveniles has been reported in the Pacific oyster, Crassostrea gigas, for many years and in several countries. The French multidisciplinary program "Morest" aims to investigate the causes of the summer mortality in Crassostrea gigas. Within this program, we designed multi-site field experiments to assess to what extent genetic variability exists for summer mortality in French populations of C. gigas and to determine whether selective breeding could improve survival.
Tipo: Text
Palavras-chave: Growth; Resistance; Selective breeding; Genetic; Crassostrea gigas; Pacific oyster; Summer mortality.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-3448.pdf

Influence of food density and temperature on ingestion, growth and settlement of Pacific oyster larvae, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rico Villa, Benjamin; Pouvreau, Stephane; Robert, Rene.
Ingestion, growth and metamorphosis of Pacific oyster, Crassostrea gigas, larvae were studied under controlled conditions of food density and temperature using a combination of a flow-through rearing system and a hydrobiological monitoring device. In a first experiment larvae were exposed to three different phytoplankton densities (12, 20 and 40 cells &amp;#956;l-1) while in a second trial larvae were reared at five different temperatures (17, 22, 25, 27 and 32°C). Both food concentration and temperature significantly affected the larval physiology throughout the entire development from D-veliger to young spat. Larvae survived over a wide range of both environmental parameters with high survival at the end of experiments. The feeding functional response...
Tipo: Text
Palavras-chave: Temperature; Food; Growth; Ecophysiology; Bivalve larvae; Crassostrea gigas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2008/publication-4747.pdf

L'huître creuse Crassostrea gigas en Bretagne. Résultats du réseau de suivi de 1991
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Bec, Claude; Mazurie, Joseph.
The year 1991 is the third one of the regional network on growth assessment of Crassostrea gigas in Brittany, wearing on 9 sites and 3 stations per site. 2 bags of 210 oysters, 18 month old, were placed in each station. Comparatively to previous years, the 1991 growth was moderate, and condition index inferior. However, the survival rates were very high (above 91 %) and most of the slight mortalities occurred a short time after stocking (as revealed by the sizes of dead shells). An improvement was also observed in the infestation rate by the polychaete Polydora sp..Most of the growth differences between sites and stations are still present. An analytical study including environmental variables would be necessary for explanations and will be tempted in 1993.
Tipo: Text
Palavras-chave: Bretagne; Crassostrea gigas; Croissance; Mortalité; Indice de condition; Polydora; A.C.P.; Brittany; Crassostrea gigas; Growth; Mortality; Condition index; Polydora; Factorial analysis.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00102/21319/18939.pdf

Assessment and interpretation of temporal or spactial differences in shellfish productivity of typical French ecosystems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazurie, Joseph; Soletchnik, Patrick; Ropert, Michel; Fleury, Pierre-gildas; Auby, Isabelle; Maurer, Daniele; Bacher, Cedric.
Monitoring of Crassostrea gigas performances, from two year-classes, during 12 years, in various French shellfish farming areas have revealed great inter-annual and inter-sites differences in reproduction, growth, mortality or quality of oysters (meat content, Polydora infestation...). The presentation attempts to highlight how a comparative analysis of existing temporal or spatial data on molluscs, water quality, geography or meteorogoly may help to better understand and manage shellfish ecosystems. The range of hydrobiological conditions (food availability, turbidity, temperature...) recorded at national, pluriannual scale, in relation to shellfish performances, enlarges the base of such relationship. However, undirect causative factors, either natural...
Tipo: Text
Palavras-chave: Climatic modulation; Hydro geography; Reproduction; Growth; Spatial differences; Water quality; Mortality; Shellfish productivity.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3318.pdf

Growth of European hake (Merluccius merluccius) in the Gulf of Lions based on conventional tagging
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mellon-duval, Capucine; De Pontual, Helene; Metral, Luisa; Quemener, Loic.
Growth of European hake was estimated from the results of a conventional tagging study in the Gulf of Lions, the first tagging experiment to have been undertaken on the species in Mediterranean waters. In all, 4277 hake 15–40 cm long were tagged and released on the inshore fishing grounds during spring 2006. The overall recapture rate was 6.5% and times-at-liberty ranged from 1 to 717 d. Growth rate in hake varied with size and sex. The estimated growth parameter (von Bertalanffy k) was estimated as double previously published values based on size frequency distribution in the area. Compared with recent growth parameters derived from the tagging experiments in the Bay of Biscay, k was estimated to be slightly lower in the Gulf of Lions. With this faster...
Tipo: Text
Palavras-chave: Age estimation; European hake; Growth; Mediterranean; Tagging.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00000/11134/11532.pdf

Length based catch analysis for east Atlantic Mediterranean bluefin tuna
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kell, Laurence T; Bonhommeau, Sylvain; Fromentin, Jean-marc.
Although the bluefin assessment is based on catch-at-age data, ageing using hard parts is an expensive and d{fficult process. Therefore length data are converted into age for bluefin using a growth curve, i.e. age slicing. Where age is predicted from length using the inverse of the von Bertalanffy growth curve. Here we show how a simple method based on length data alone can be used to estimate population parameters such as total mortality (Z).
Tipo: Text
Palavras-chave: Bluefin; Catch curve analysis; Growth; Length; Mortality.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00191/30274/28734.pdf

Variablility of stable isotope signatures (delta C-13 and delta N-15) in two spider crab populations (Maja brachydactyla) in Western Europe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodin, Nathalie; Le Loch, Francois; Hily, Christian; Caisey, Xavier; Latrouite, Daniel; Le Guellec, Anne-marie.
The ontogenic variations of nitrogen and carbon stable isotopic signatures (delta N-15 and delta C-13) were investigated in two spider crab (Maja brachydactyla) populations inhabiting in different biotopes of Western Europe. The Iroise Sea population is localized in Western Brittany and characterized by a seasonal migration occurring on a large bathymetric and habitat gradient while the Seine Bay population, in the Eastern English Channel, remains in a more homogeneous environment during its migration. In the Iroise Sea population, delta C-13 Values increased significantly both with body size and age, revealing a shift towards "benthic-component" prey with spider crab growth. On the contrary, neither body size nor ageing gave rise to a significant trophic...
Tipo: Text
Palavras-chave: Migration; Marine decapod crustaceans; Growth; Feeding; Carbon and nitrogen stable isotopes.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2535.pdf

REMONOR : Résultats 2006. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ropert, Michel; Pien, S.; Mary, Charlotte; Bouchaud, B.
Le réseau régional de suivi REMONOR s'appuyant sur les acquis du réseau national REMORA de l'Ifremer, évalue chaque année la mortalité, la croissance et la qualité sur deux classes d'âges d'huîtres creuses (« adultes » = 2 ans et « juvéniles » = 1 an), réparties entre différentes stations dans les principaux secteurs ostréicoles Bas-Normands.  Ce réseau, mené en collaboration par le LERN (Laboratoire Environnement Ressources de Normandie) et le SMEL (Syndicat Mixte de L'Equipement du Littoral), intègre deux nouvelles stations en 2006 : Veules les Roses (VR01), dont le suivi, allégé l'an dernier, est aujourd'hui complet et Denneville (CO10) qui doit compléter les connaissances sur le nord de la Côte Ouest du Cotentin. Une station est à l'étude cette année...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-3468.pdf

Modeling trace metal accumulation in the mediterranean mussel, mytilus galloprovincialis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Casas, Stellio; Cossa, Daniel; Gonzalez, Jean-louis; Bacher, Cedric; Andral, Bruno.
Monitoring coastal contamination by trace metals pollution using mollusks bivalves as quantitative bioindicators is widely performed in many international biomonitoring programs. In this purpose, modeling metal dynamic in marine mussels is a reliable tool. It allows understanding the bioaccumulation process which results from the interactions between biological, chemical and environmental factors. To calibrate such a model, kinetic experiments on uptake and elimination were conducted on three Mediterranean sites chosen on the basis of their different nutritive and chemical characteristics.
Tipo: Text
Palavras-chave: Growth; Heavy metals; Bioaccumulation; Mytilus galloprovincialis; Bioindicator.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-370.pdf

Réseau de suivi de la croissance de l'huître creuse sur les côtes françaises. REMORA. Résultats des stations nationales. Année 1997
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Ruelle, Francois; Claude, Serge; Palvadeau, Hubert; Robert, Stephane; D'Amico, Florence; Vercelli, Catherine; Chabirand, Jean-michel.
1. Introduction: network organisation in 1997. The REMORA network - REseau MOIIusques du département Ressources Aquacoles de l'Ifremer - (Ifremer's Aquaculture Resources Department Mollusc Network) has been evaluating, since 1993, hollow oysters' growth (Crassostrea gigas) in major French oyster beds. In order to do so, it has followed up on a yearly basis the growth of a unique oyster batch shared among different stations in the main French raising areas. Releasing takes place in February and picking happens in November or December; intermediary sampling is done in June and September. All operations happen on the same dates for all stations. A national report is published each year. 'Regional' stations are sometimes added to the national network, but they...
Tipo: Text
Palavras-chave: France; Growth; Network of monitoring; Crassostrea gigas; Oyster culture.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/rapport-1765.pdf

Performances de croissance de l'huître creuse, Crassostrea gigas (Thunberg) dans le bassin d'élevage de Marennes-Oléron entre 1979 &amp; 1982
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthome, Jean-paul; Prou, Jean; Bodoy, Alain.
Growth of the japanese oyster, Crassostrea gigas was monitored during 4 years, by following the recruitment of the year 1978, held in rearing conditions. After three and half years, the average length was la cm and the average total weight was 80 g. Clear seasonal changes were observed on the growth in length and weight.  An  important loss in dry weight occured in July, during the release of gametes. Such losses constituted 29 %, 43 % and 60 % of the dry weight, respectively for individuals which were 2 years, 3 years and 4 years old. The higher instantaneous growth rates  (G) were observed during spring and at the beginning of summer. Growth model of Von Bertalanffy, gave the best estimate for the length growth of the species. During the 1979-1982...
Tipo: Text
Palavras-chave: Growth parameter; Growth model; Reardd stock; Crassostrea gigas; Oyster; Growth; Descripteurs de croissance; Modèle de croissance; Stock cultivé; Crassostrea gigas; Huître; Croissance.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2967.pdf

A brief review of nutritional studies for Penaeus monodon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Liao, I; Liu, F.
In order to develop effective formulated for Penaeus monodon , sufficient information is needed on its nutritional requirements. Unfortunately, research on this area has been very limited. This paper outlines the results of such research. Since data on the nutritional requirements of P. japonicus are relatively well established, some of these data are also reviewed in this paper and are used as a basis for assessing the nutritional requirements of P. monodon . Protein, lipid, carbohydrate, mineral and vitamin requirements are evaluated from the parameters of growth survival and feed efficiency. Studies on the effects of enzymes and the development of microparticulate diet for larvae are also summarized.
Tipo: Text
Palavras-chave: Penaeus monodon; Pond culture; Shrimp culture; Amino acids; Fatty acids; Marine crustaceans; Diets; Enzymes; Feed efficiency; Survival; Growth; Vitamins; Carbohydrates; Lipids; Proteins.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1471.pdf

Response to domestication and selection for growth in the European sea bass (Dicentrarchus labrax) in separate and mixed tanks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandeputte, Marc; Dupont Nivet, M; Haffray, P; Chavanne, H; Cenadelli, S; Parati, K; Vidal, Marie-odile; Vergnet, Alain; Chatain, Beatrice.
Selective breeding of European sea bass (Dicentrarchus labrax) receives a growing interest, as the estimated heritability of growth is medium to high. In this study, we compared the offspring of four groups of sea bass sires, mated with the same wild dams: wild (W), first generation of domestication (D), first generation of mass selection for length (M), first generation of PROSPER-like selection for length (P). The comparison was done both in replicated tanks (separate rearing) and in mixed tanks (mixed rearing) where sire origins were recovered by genotyping of eight microsatellite markers. Weight, length and growth rate were measured from day 238 post-fertilization (69 g mean weight) to day 611 post-fertilization (390 g mean weight). Both in mixed and...
Tipo: Text
Palavras-chave: Nephrocalcinosis; Competition; Microsatellites; Parentage assignment; Realized heritability; Selection response; Growth; Selective breeding; Dicentrarchus labrax; European sea bass.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-5303.pdf

Mathematical model and numerical simulations of the migration and growth of Biscay Bay anchovy early larval stages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boussouar, Ahmed; Le Bihan, Soizick; Arino, Ovide; Prouzet, Patrick.
The paper presents a mathematical model of the early larval stage, from spawn to the resorption of the yolk-sac, of the anchovy, Engraulis encrasicolus, of the Bay of Biscay. The model describes the temperature-dependent growth and drift of passive larvae by the currents and vertical turbulence. A numerical code has been built and numerous simulations, fed by both biological (egg surveys by AZTI-San Sebastian, Spain, and IFREMER, France) and physical (circulation model by IFREMER-Brest, France) data, were undertaken. Their main features are presented and discussed here, and some conclusions on the possible utilization of the results in improving estimates of anchovy stocks by the daily egg production method are drawn.
Tipo: Text
Palavras-chave: Passive stage; Numerical simulation; Migration; Growth; Anchovy; Stade passif; Simulation numérique; Migration; Croissance; Anchois.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-518.pdf

Etude expérimentale et modélisation des effets de la lumière et des sels nutritifs azotés sur la croissance d'une algue unicellulaire servant de fourrage en aquaculture intensive
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Frecon, Pierre.
INTRODUCTION For several years, intensive aquaculture has been aiming at experimentally building shortened food chain allowing commercial farming of one mollusk or fish specie. Therefore, CNEXO (IFREMER) developed several branches in its laboratories, each one starting with the growing of one or several unicellular algae which primary production was utilised to feed, either an intermediary herbivore crustacean, or directly larvae or juvenile mollusks (abalone, scallops...). A first step consisted in setting up then trivialize in vitro algal production. Now that we can benefit from routine farming, it seems interesting to move on to a second step, a more analytical one, in order to possibly optimize this type of production. The object of this DEA internship...
Tipo: Text
Palavras-chave: Nitrogenized nutritive salts; Light; Growth; Unicellular seaweed; Intensive aquiculture; Sels nutritifs azotés; Lumière; Croissance; Algue unicellulaire; Aquaculture intensive.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/rapport-1654.pdf

Nutriments et biomasse microalgale de l'interface eau-glace au large de Kuujjuarapik, Baie d'Hudson, Arctique Canadien
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maestrini, S; Rochet, M; Legendre, L; Demers, S.
Nutrient analyses were done in melted ice, frazil and sea water of the upper part of the water column, where as major constitutive elements of micro-algae were analysed. Measurements of nutrient uptake were carried out with frazil algae incubated at -1.5 degree C in a field incubator. Differential-enrichment bioassays and mean N/P ratio (5.9) demonstrated that actual growth of the cultures was nutrient-limited. Nitrogen governed the algal yield when illumination and grazing allowed the microalgae to grow. It concluded that the epontic dynamics is not only controlled from above, by the seasonal (climatic) changes in light intensity as generally assumed, but also from below, by the short-term (hydrodynamic) events of vertical mixing that replenish the...
Tipo: Text
Palavras-chave: Nutritive value; Growth; Food absorption; Algae; Ice water interface; Biomass; Nutrients (mineral).
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1533.pdf

Description mathématique de la croissance de Lesueurigobius friesii (Teleostei, Gobiidae). Essai de synthèse
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gros, Philippe.
A population of the burrowing goby Lesueurigobius friesii was studied from 1974 to 1979, at a sampling station located on a Nephrops ground in the northem Bay of Biscay, off the south coast ofBrittany; samples were collected close to a muddy bottom, at depths ranging from 80 to 100 m. Data on demographie structures were obtained by two independent exercises: examination of oto1iths and the analysis of length-frequency distributions. The fish attains a standard length of at !east 71 mm and an age of 6 years. Most growth takes place during the first three years of !ife, and proceeds very slowly thereafter. The state of gonad development was assessed qualitatively by visual inspection of the body cavity of females; spawning occurs in spring, and by July 61 of...
Tipo: Text
Palavras-chave: Croissance; Modèle de Von Bertalanffy; Comparaison de courbes de croissance; Téléostéens; Golfe de Gascogne; Growth; Von Bertalanffy's model; Comparison of growth curves; Teleostei; Bay of Biscay.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00122/23302/21129.pdf

Preliminary results on growth and movements of dogfish Scyliorhinus canicula (Linnaeus, 1758) in the Cantabrian Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodriguez-cabello, C; De La Gandara, F; Sanchez, F.
In this paper we present the first results on growth of dogfish (Scyliorhinus canicula L.) obtained from size frequency distributions collected during bottom trawl surveys and from 19 recaptures to date from 2 153 tagged individuals. The surveys belong to a series carried out in autumn in the Cantabrian Sea by the Institute Espanol de Oceanografia (1983-1995). The estimated parameters from the von Bertalanffy equation applying the Bhattacharya, Gulland and Holt and Ford-Walford methods were K of around 0.09-0.13, and a maximum length close to 89-98 cm. In addition, based on ten recoveries with reliable data of location we assume a priori that this species does not move long distances in the area of study
Tipo: Text
Palavras-chave: Roussette; Croissance; Répartition en taille; Recapture; Migration; Dogfish; Growth; Length-frequency; Recapture; Migration.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00326/43691/43119.pdf

Does dietary n-3 highly unsaturated fatty acids level influence the European sea bass (Dicentrachus labrax) capacity to adapt to a high temperature?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Person, Jeannine; Skalli, Ali; Dulau, Barbara; Le Bayon, Nicolas; Le Delliou, Herve; Robin, Jean.
Triplicate groups of European sea bass juveniles (60 g) were fed for 84 days two experimental diets containing either vegetable or marine oil (0.4 and 2.2% n-3 highly unsaturated fatty acid [n-3 HUFA] dry matter in LD and HD, respectively) and held at 22 or 29 degreesC (LD-22, LD-29, HD-22 and HD-29 groups). Significant differences in mass gain between the two diets and temperatures were, observed from day 28 onwards, and on day 84, weight was 18% higher in the HD-29 group than in the LD-22 group (the highest and lowest values. respectively). Over the 84-day period-SGR was significantly affected both by temperatures and diets (P=6x10(-4) and 2x10(-4) respectively), averaging 1.01 and 1.07 in the HD-22 and HD-29 groups compared to 0.92 and 1.0 in the LD-22...
Tipo: Text
Palavras-chave: Oxygen consumption; Fatty acid composition; Growth; Temperature; N 3 HUFA; European sea bass.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-502.pdf

A length-structured spatially explicit model for estimating hake growth and migration rates
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Drouineau, Hilaire; Mahevas, Stephanie; Bertignac, Michel; Duplisea, Daniel.
Drouineau, H., Mahevas, S., Bertignac, M., and Duplisea, D. 2010. A length-structured spatially explicit model for estimating hake growth and migration rates. - ICES Journal of Marine Science, 67: 1697-1709.
Tipo: Text
Palavras-chave: Growth; Length-structured model; Merluccius merluccius; Migration; Spatial model.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00016/12714/9767.pdf

Domestication and Temperature Modulate Gene Expression Signatures and Growth in the Australasian Snapper     Chrysophrys auratus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wellenreuther, Maren; Le Luyer, Jeremy; Cook, Denham; Ritchie, Peter A.; Bernatchez, Louis.
Identifying genes and pathways involved in domestication is critical to understand how species change in response to human-induced selection pressures, such as increased temperatures. Given the profound influence of temperature on fish metabolism and organismal performance, a comparison of how temperature affects wild and domestic strains of snapper is an important question to address. We experimentally manipulated temperature conditions for F1-hatchery and wild Australasian snapper (Chrysophrys auratus) for 18 days to mimic seasonal extremes and measured differences in growth, white muscle RNA transcription and hematological parameters. Over 2.2 Gb paired-end reads were assembled de novo for a total set of 33,017 transcripts (N50 = 2,804). We found...
Tipo: Text
Palavras-chave: Domestication; Temperature; Transcriptomics; Growth; Sparidae.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00476/58788/61321.pdf

Analyse des pratiques, contraintes et performances d'élevage de l'huître creuse Crassostrea gigas, en 2001, sur différentes concessions en eau profonde de la Baie de Quiberon : enquête auprès de 18 concessionnaires et plongées sur 18 semis d'huîtres de 2 ans, en juin et octobre 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazurie, Joseph; Foucart, Marie; Langlade, Aime; Bouget, Jean-francois; Fleury, Pierre-gildas; Joly, Jean-pierre; Martin, Anne-genevieve.
This study deals with rearing methods, growth and mortality performances, and problems encountered by the oyster farmers from Quiberon Bay (2800 ha of leases) : it relies on a survey achieved in july 2001, about 18 oyster farmers, and 2 diving campaigns (july and october 2001) on 2 years old oyster batches from the same farmers.  The analysed enterprises vary in particular by the location and depth of their concession inside the bay, but also by their rearing scheme : a majority favours seedings with 18 month old oysters or more, according to prices and availability of oysters supplies. The duration until marketable size and mean mortalities seem to have increased since a preceding inquiry in 1986.  The main constraint, affecting priorly the south border...
Tipo: Text
Palavras-chave: Rearing practices; Density; Predators; Mortality; Growth; Bay of Quiberon; Crassostrea gigas; Cupped oyster; Pratiques culturales; Densité; Algues; Prédateurs; Mortalité; Croissance; Baie de Quiberon; Crassostrea gigas; Huître creuse.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-6103.pdf

Substitution of fish meal with plant protein sources and energy budget for white shrimp Litopenaeus vannamei (Boone, 1931)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Suarez, J. A.; Gaxiola, G.; Mendoza, R.; Cadavid, S.; Garcia, G.; Alanis, G.; Suarez, A.; Faillace, J.; Cuzon, Gerard.
Fish meal (FM) has long been considered an essential ingredient for the formulation of shrimp feeds. Until recently, 12%FM was considered a minimum amount, below which weight gain would become reduced due to a reduction in feed intake. In order to test this perceived minimum value, an experiment was conducted on a long-term basis with 4 replicates. Four practical isonitrogenous and isoenergetic diets were formulated for Litopenaeus vannamei juveniles. Survival, weight gain, feed conversion ratio (FCR) and protein efficiency ratio were determined for 0, 6, 10 and 15% FM diets and a reference diet. Shrimp survival ranged from 84 to 86.5%. Shrimp fed a diet with 0% FM showed lower average weight and SGR compared to the other treatments (P&lt;0.05). FCR of...
Tipo: Text
Palavras-chave: Metabolism; Growth; Plant proteins; Substitution fish meal; L. vannamei.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6630.pdf

Effects of oil exposure and dispersant use upon environmental adaptation performance and fitness in the European sea bass, Dicentrarchus labrax
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Claireaux, Guy; Theron, Michael; Prineau, Michel; Dussauze, Matthieu; Merlin, Francois Xavier; Le Floch, Stephane.
The worldwide increasing recourse to chemical dispersants to deal with oil spills in marine coastal ecosystems is a controversial issue. Yet, there exists no adequate methodology that can provide reliable predictions of how oil and dispersant-treated oil can affect relevant organism or population-level performance. The primary objective of the present study was to examine and compare the effects of exposure to untreated oil (weathered Arabian light crude oil), chemically dispersed oil (Finasol, TOTAL-Fluides) or dispersant alone, upon the ability of fish for environmental adaptation. To reach that goal, we implemented high-throughput, non-lethal challenge tests to estimate individual hypoxia and heat tolerance as surrogate measures of their capacity to...
Tipo: Text
Palavras-chave: Oil-spill; Dispersant; Fish; Temperature; Hypoxia; Survival; Growth; Environmental adaptation ability; Darwinian fitness.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00137/24831/23045.pdf

Long-term changes in density, population structure and growth rate of Tellina tenuis from Dublin Bay, Ireland
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wilson, Jg.
Changes in the Tellina tenuis population in Dublin Bay, Ireland since 1977 are described. Population density at the monitoring site increased from 260 m(-2) (although a maximum density of 548 m(-2) was found nearby) in 1977 to a peak of 434 m(-2) in 1989. Densities recently have been the lowest recorded, around 170 m(-2). These changes do not seem to have been associated with any change in elevation of the site. The population structure has changed considerably, from one dominated by larger, older animals in 1977, when there did not seem to have been any significant recruitment for the previous two years, to one in which recruitment, if not in any great numbers, has at least been more or less regular, with the last two years (1993 and 1994) showing the...
Tipo: Text
Palavras-chave: Tellina tenuis; Long-term; Population; Growth; Ireland.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20396/18063.pdf

Status of red drum culture in the USA
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arnold, C.
An overview of the methods of producing red drum are discussed. Although red drum culture is new compared to the culture of other species there is much interest in the production both in earthen ponds and in recirculating intensive systems. Various strategies for both methods will be discussed. This includes stocking rates, optimum growth, temperature, salinity and growth rates of red drum (Sciaenops ocellatus).
Tipo: Text
Palavras-chave: Salinity tolerance; Temperature effects; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1480.pdf

Influence of turbulence and turbidity on growth and survival of laboratory-reared bivalve larvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Seaman, Matthias; His, Edouard; Keskin, Mehmet; Reins, Torsten.
Laboratory-reared larvae of mussels (Mytilus galloprovincialis ) were incubated with and without sediment in a novel turbulence-producing machine. The sediments used were fine silt from the Gironde Estuary and from the German Wadden Sea. Larvae incubated in turbulence without sediment, and in suspended sediment concentrations similar to in situ conditions had growth rates which did not vary significantly from those of the controls. The growth rates of larvae incubated in 5 to 20 g/l of sediment were reduced by 20 to 50%. Survival was lower in larvae incubated with sediments than in turbulent and non-turbulent controls, but it was not correlated with sediment concentration. The results indicate that the mechanical effects of turbulence and turbidity on...
Tipo: Text
Palavras-chave: Controlled conditions; Environmental factors; Growth; Mollusc culture; Rearing; Survival; Turbidity; Mytilus galloprovincialis.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00038/14902/12228.pdf

Ecologie bacterienne dans les bacs d'elevage larvaire de coquilles Saint-Jacques (Pecten maximus )
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jacq, E; Moal, Jeanne; Samain, Jean-francois; Corre, S; Daniel, J; Nicolas, Jean-louis; Cochard, Jean-claude; Fera, P.
Larval rearings were performed with seawater either freshly pumped or after storage in a pond. Concerning bacterial populations these waters were characterized by a high diversity, little sized bacteria whose few of them (1%) were cultivable on Zobell medium. In the tanks, the bacterial ecosystem was modified by the presence of antibiotics, larvae and algae: the diversity was lowered, the cellular volume was increased by a factor 2 to 5, 100% bacteria were cultivable and chloramphenicol resistant, and their metabolism changed. Taxonomic screening showed no differences among the two waters neither at the beginning nor at the end of the rearings. However, depending on the water (stored or not) differences were identified for bacterial physiology and...
Tipo: Text
Palavras-chave: Marine aquaculture; Pond culture; Scallop culture; Ecology; Antibiotics; Organic matter; Grazing; Carbohydrates; Mathematical models; Modelling; Growth; Bacterial diseases; Biological production; Culture tanks; Larvae; Rearing.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-914.pdf

La mytiliculture dans le "Pertuis Breton": synthèse des travaux réalises de 1980 a 1992
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dardignac, Marie-jose.
The studies carried out between 1980 and 1992 in the "Pertuis Breton" showed that mussels growth was systematically reduced near the coastline for an identical immersion time. No relationship was established between current pattern, stocking biomass and growth results. In contrast, poor growth was strongly correlated to seawater quality and especially to high seston load. The author suggests further studies which could confirm and complement these results: a better environment understanding through data acquisition, inclusion of additional parameters, studies on factors affecting shellfish quality. Furthermore, specific studies are proposed which are aimed at optimising mussel production in the Pertuis Breton. This includes a constant spat recruitment...
Tipo: Text
Palavras-chave: Bivalvia; Recruitment; Spat; Mussel culture; Growth; Bouchot; Mytilus edulis; Pertuis Breton; Moule; Growth; Bouchot; Mytilus edulis; Pertuis Breton.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-1911.pdf

Age and growth of the striped seabream, Lithognathus mormyrus (Actinopterygii: Perciformes: Sparidae), in the central coast of Algeria, Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boufersaoui, Samira; Kassar, Abderrahmane; Mokrane, Zakia; Elleboode, Romain; Mahe, Kelig.
Background. Striped seabream, Lithognathus mormyrus (Linnaeus, 1758), is a bony fish, which has a high economic value on the Algerian coast. Because of the increasing fishing pressure, however, a close monitoring is recommended. The information about the biology of this species, occurring in the south-western Mediterranean Sea and especially in the north African coast, is very limited. The presently reported study provides new estimated data on age and growth parameters of striped seabream in Algeria. Materials and methods. A total of 449 specimens of L. mormyrus were sampled for 2 years (January 2013 to December 2014) from the commercial fishery in the central part of the Algerian coast. The samples were collected monthly. The fish ranged in size from...
Tipo: Text
Palavras-chave: Lithognathus mormyrus; Otolith; Age; Growth; Algerian coast; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00473/58448/61028.pdf

Individual growth variation and its relationship with survival in juvenile Pacific oysters, Crassostrea gigas (Thunberg)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boudry, Pierre; Collet, B; Mccombie, Helen; Ernande, Bruno; Morand, B; Heurtebise, Serge; Gerard, Andre.
In order to study individual growth variability and its relationship with survival in juvenile Crassostrea gigas, parental oysters were sampled at four sites located along the French Atlantic coast and bred under controlled hatchery conditions. Four groups of larvae were obtained by crossing five males and five females from each of the four sites, and a fifth group by crossing these 20 males and 20 females together in a pool. Larvae were reared under conditions allowing the maintenance of a maximum variability of size and gave five experimental groups. Oysters were individually monitored for growth and survival from 3 to 10 months after fertilization. The individual growth performances were relatively stable over time and no noticeable compensation for...
Tipo: Text
Palavras-chave: Survival; Oysters; Growth; Crassostrea gigas; Aquaculture.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-467.pdf

Essai de culture de l'huître plate Ostrea edulis dans le bassin d'Arcachon. Résultats préliminaires
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Rene; Pichot, Yves; Comps, Michel.
From 1988 to 1989, a study has been conducted pertaining to the growth of the flat oyster Ostrea edulis, as well as Marteilia refringens and Bonamia ostreae outbreaks.  Commercial mono specific farming (flat oysters), with low density or mixed (flat and hollow oysters) along with higher density, has been taking place in the Arcachon basin oceanographic sectors, where main hydrobiological parameters were acquired simultaneously.   The excellent growth of the flat oyster was witnessed in mono specific farming. However this growth was average in mixed farming, probably due to higher total oyster density and interspecies competition. Regardless of the type of farming, Marteilia refringens infection was very quick and may have been related to climatic bay water...
Tipo: Text
Palavras-chave: Basin of Arcachon; Pathology; Bonamia ostreae; Marteilia refringens; Growth; Ostrea edulis; Bassin d'Arcachon; Pathologie; Bonamia ostreae; Marteilia refringens; Croissance; Ostrea edulis.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-1592.pdf

Determinism of Temporal Variability in Size at Maturation of Sardine Sardina pilchardus in the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Véron, Matthieu; Duhamel, Erwan; Bertignac, Michel; Pawlowski, Lionel; Huret, Martin; Baulier, Loic.
Age and size at maturation appear as key parameters governing the dynamics of a population as they affect growth rate, fecundity, and survival. The expression of such life history traits is determined by genetic make-up and modulated by environmental factors mainly through phenotypic plasticity. Moreover, fishing, besides decreasing population size and changing demographic composition can alter allelic frequencies through fisheries-induced evolution by selecting for some particular traits. In the Bay of Biscay, a decreasing trend in both sardine body condition and size-at-age has recently been pointed out at the population level. The Probabilistic Maturation Reaction Norm (PMRN) approach was applied to help disentangle phenotypic plasticity and genetic...
Tipo: Text
Palavras-chave: Fisheries-induced evolution; Body condition; Phenotypic plasticity; Maturation; Growth; Sardina pilchardus; Bay of biscay.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00660/77203/78637.pdf

Etude comparative des caractéristiques écophysiologiques et des performances de croissance de l'huître creuse Crassostrea gigas diploïde et triploïde en milieu contrôlé
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Haure, Joel; Fortin, Adeline; Dupuy, Beatrice; Nourry, Max; Palvadeau, Hubert; Papin, Mathias; Penisson, Christian; Martin, Jean-louis.
Introduction: Marine farming in France is currently very widely dominated by oyster farming. French oyster production totals 148,467 tons, for a turnover of close to 280 million euros, making France the leading European producer. The two main species concerned are the cup oyster, Crassostrea gigas (140,000 tons) and the flat oyster, Ostrea edulis (2,000 tons), the production of which has collapsed since 1970 following successive epizootics of Marteilia refringens and Bonamia ostreae. French oyster farming is thus in a situation of quasi single-crop farming, with more than 90% of tonnage pertaining to the cup oyster (FAO data from 1993).  This situation of quasi single-crop farming leads to the pessimistic observation that one hypothetical crisis in the...
Tipo: Text
Palavras-chave: Growth; Ecophysiology; Oyster; Crassostrea Gigas; Eeproduction; Milieu Controle; Croissance; Triploide; Diploide; Ostreidae; Huitre; Crassostrea Gigas; Ecophysiologie; Reproduction.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-1509.pdf

Performance of triploid Pacific oysters Crassostrea gigas (Thunberg) reared in high carrying capacity ecosystem : survival, growth and proximate biochemical composition
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goulletquer, Philippe; Joly, Jean-pierre; Gerard, Andre; Le Gagneur, Eric; Moriceau, Jacques; Peignon, Jean-marie; Heurtebise, Serge; Phelipot, Pascal.
Triploid oysters Crassllstrea gigas were: produced in 1990 by treating fertilized eggs with cytochalasin B (CS). Triploids, treated diploids, and controls were deployed early 1991 in a high carrying capacity ecosystem on the Eastern Coast of Normandy (France). A monthly monitoring in 1992 showed that triploids yielded significantly higher growth rate and biochemical composition. However, growth was more heterogeneous. No evidence was found for a length or weight bimodal frequency distribution within triploid groups after a 26 months rearing cycle. Triploids showed retardation of gametogenesis. Carbohydrates content in triploids remained almost constant (40%) from June to September. Their survival rates were significantly lower than controls. Moreover...
Tipo: Text
Palavras-chave: Biochemical compostion; Survival; Carrying capacity; Triploid; Growth; Oysters; Crassostrea gigas; Composition biochimique; Survie; Capacité trophque; Triploïdes; Croissance; Huîtres; Crassostrea gigas.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/publication-3088.pdf

Selection of finfish species for aquaculture development in Martinique (FWI).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thouard, Emmanuel; Soletchnik, Patrick; Marion, J.
Since 1981, in Martinique, a programme of selection of fishes suitable for aquaculture has been conducted. Zootechnical and socio-economical constraints have led to the choice of three species, endemic and exotic: the palometa (Trachinotus goodei ), the red drum (Sciaenops ocellata ) and the red florida hybrid (Oreochromis sp.).
Tipo: Text
Palavras-chave: Trachinotus goodei; Pisces; Brood stocks; Sea water; Fresh water; Recirculating systems; Survival; Eggs; Sexual maturity; Spawning; Environmental conditions; Tropical fish; Fingerlings; Rearing; Aquaculture development; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1492.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; résultats des stations NATIONALES ; Année 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Cornette, Florence; Claude, Serge; Palvadeau, Hubert; Robert, Stephane; D'Amico, Florence; Le Gall, Patrik; Vercelli, Catherine; Pien, S.
The monitoring network IFREMER /REMORA is assessing, on a yearly basis, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year old ; and "adults" = two-years old), distributed among various stations of the main French oyster areas. Samplings are carried out in March, June, September and December. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be considered as an accurate estimation of professional oyster ongrowings. In 2001, mortality mainly occured in Summer on "adults" in baie des Veys (Normandy) and on juveniles in Cancale and Pénerf (Brittany) and in Fouras and Marennes (Poitou-Charentes). With an average individual weigh of 59 g in December, 2001 has been a...
Tipo: Text
Palavras-chave: Polydora; Quality; Growth; Mortality; Crassostrea gigas; Cupped (gigas) oyster; France; REMORA; Polydora; Qualité; Croissance; Mortalité; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2438.pdf

Ajustement de modèles mathématiques de la croissance d'algues phytoplanctoniques en culture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Berre, Jerome.
Introduction: This document is the End of Second Year internship report for Rennes University 1's Senior Math and Computer Science Modelisation Professional diploma. This two month internship was completed at the Brest IFREMER center at the Coastal Ecology department.  IFREMER participates, in the course of its institutional missions, in observation and coastal sea surveillance, in order to improve on the knowledge, protection methods and restoration of the marine environment. Marine phytoplankton proliferation is an important study subject because of its potential cause for nuisance, for men, consumers of sea products as well as for the ecosystem.  During Spring and Summer, shellfish become invariably unsuitable for consumption due to toxins produced by...
Tipo: Text
Palavras-chave: Aquaculture; Growth; Phytoplanctonic algae; Mathematical models.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-1770.pdf

Total replacement of fish oil by soybean or linseed oil with a return to fish oil in turbot (Psetta maxima) - 1. Growth performance, flesh fatty acid profile, and lipid metabolism
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Regost, Christelle; Arzel, Jacqueline; Robin, Jean; Rosenlund, Grethe; Kaushik, Sadasivam.
The aim of the study was to investigate the replacement of fish oil by vegetable oils and the effects of a washout with a return to fish oil on growth performances and lipid metabolism. three experimental fish meal-based isonitrogenous (crude protein content: 57.5%) and isolipidic (crude lipid content: 16.5%) diets were formulated containing either 9% of added fish oil (170), soybean oil (SO), or linseed oil (LO). Each diet was distributed to triplicate groups of 25 marketable size turbot (initial body weight of 579 g) grown in seawater at water temperature of 17 T. Fish were fed once a day to visual satiety. At the end of the growth trial, which lasted 13 weeks, all groups of turbot were fed with FO diet for 8 weeks. The growth of turbot was high, but the...
Tipo: Text
Palavras-chave: Lipogenesis; Fatty acids; Liver; Muscle; Body composition; Growth; Vegetable oil; Fish oil; Psetta maxima.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-375.pdf

L'adaptation ecophysiologique et sanitaire de l'ecrevisse turque Astacus leptodactylus a des milieux saumatres: Contribution a l'astaciculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barbe, D; Lautier, J; Vernet, G; Vey, A.
This influence of salt media on different aspects of biological cycle and on most common pathogenic agents of Turkish freshwater crayfish Astacus leptodactylus is investigated survival and growing of juveniles O super(+) and intermediary individuals 1 super(+) are also studied. Total osmotic metabolism and reproduction, have been recorded. It appears that youngest individuals are particularly sensitive to low salinities (7 ppt.). Intermediary ones are more resistant nevertheless salinity does not improve neither survival nor growing. Copulation, laying and pleopod egg fixation are particularly affected by salt waters. The only promising application of salinity parameter on astaciculture could be whether prophylactic or curative treatment with concentrated...
Tipo: Text
Palavras-chave: Astacus leptodactylus; Malacostraca; Infectious diseases; Sexual reproduction; Growth; Mortality; Survival; Osmotic adaptations; Crayfish culture; Pathology; Metabolism; Salinity; Ecophysiology; Astaciculture; Régulation osmotique; Reproduction; Survie; Croissance; Pathologie; Ecophysiologie; Salinité; Astacus leptodactylus; Ecrevisse.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1185.pdf

Genetic basis of growth, survival and their plasticity in the Pacific oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ernande, Bruno; Boudry, Pierre; Heurtebise, Serge; Haure, Joel; Martin, Jean-louis.
Introduction : Growth and survival are the life-history traits of the most interest for oyster production since they determine biomass output (growth x survival). This study aimed to investigate whether there is genetic basis for growth, survival and their plasticity to know if a selection program is conceivable for these traits. Material and Methods : Nested half-sibs mating design was used to produce families of oysters: 5 males were each mated to three females producing 5 half-sibs families, each containing 3 full-sib families. At 15 months of age (May 1999), each full-sibs family was randomly split into five groups which were given different treatments. Two groups were placed in a constant environment: one with low food resources and another with high...
Tipo: Text
Palavras-chave: Genotyic; Plasticity; Survival; Growth; Genetic; Crassostrea gigas; Pacific oyster.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/acte-3498.pdf

Growth of an Inshore Antarctic ﬁsh, Trematomus newnesi (Nototheniidae), off Adelie Land
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig; Elleboode, Romain; Loots, Christophe; Koubbi, Philippe.
Dusky rockcod, Trematomus newnesi, is a widely distributed neritic circumpolar Antarctic fish species. We conducted a study on age and growth of Trematomus newnesi in coastal waters of Adélie Land in East Antarctica. A total of 289 specimens were collected in 2003, 2005, 2006 and 2009. They consisted of 122 females, 132 males and 35 immature specimens. Total length (TL) and total weight (W) of these fish ranged from 13.5 to 25 cm and 19.7 to 174 g respectively for females and from 12 to 20.9 cm and from 24.1 to 144.1 g for males. The TL/W relationship was described by the following parameters: a=7.2.10-3 and b=3.127, showing no significant difference between sex (ANCOVA, P&lt;0.05). Fish age was estimated by counting annual growth increments on polished...
Tipo: Text
Palavras-chave: Antarctic fish; Trematomus newnesi; Otoliths; Growth; Age; Adelie land.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44440/44156.pdf

Contribution of several nitrogen sources to growth of Alexandrium catenella during blooms in Thau lagoon, southern France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Collos, Y; Vaquer, A; Laabir, M; Abadie, Eric; Laugier, Thierry; Pastoureaud, Annie; Souchu, Philippe.
A monitoring program with a weekly sampling frequency over a 15-month period indicates that urea concentrations above a certain threshold level may trigger the blooms of Alexandrium catenella in Thau lagoon. However, urea concentrations were also sometimes related to ammonium and dissolved organic nitrogen concentrations, indicating that the role of urea may not be a direct one. An original approach is used to assess the relative contribution of several nitrogen sources (nitrate, nitrite, ammonium, urea) to growth of A. catenella by comparing nitrogen uptake rates to nitrogen-based growth rates estimated from dilution experiments during four blooms over a 4-year period (2001-2004) in Thau lagoon. Nitrate and nitrite contributed 0.1-14% and 0.1-5%...
Tipo: Text
Palavras-chave: Uptake kinetics; Ammonium; Urea; Growth; Nitrogen; HAB; Alexandrium catenella.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-6454.pdf

Estimation de la qualité biologique de l'eau sur le littoral atlantique du Sud-Ouest de la France à l'aide des tests de croissance des larves de Mytilus edulis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: His, Edouard; Quiniou, Francoise.
The quality of the seawater off the southwestern Atlantic coast of France was assessed by studying the effects of the water from three sites (Arcachon Bay, Mimizan and Capbreton) on larvae of the mussel (Mytilus edulis). Mussel larvae were raised in water samples taken at all three sites on March 12, 1991 and larval growth was monitored during 10 days. The results indicate that the water quality was best in the Bay of Arcachon, followed by Mimizan, whereas the water off Capbreton was possibly contaminated by pollutants.
Tipo: Text
Palavras-chave: Croissance; Qualité de l'eau; Développement larval; Pollution; Mytilus edulis; Growth; Water quality control; Larval development; Pollution; Mytilus edulis.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00038/14903/12229.pdf

Marine finfish pathology: Specific problems and research in the French West Indies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gallet Desaint Aurin, D; Raymond, J; Vianas, Viviane.
The finfish species reared in marine intensive conditions in the French Caribbean Islands are imported (European seabass, American red drum and Oreochromis hybrids) or local (Carangids and Lutjanids) species. The European seabass (Dicentrarchus labrax ) is susceptible, during its first year of life, to a contagious disease characterized by whirling and hyperexcitability, associated with severe lesions of the brain, viral particles being pointed out in the damaged nervous cells.
Tipo: Text
Palavras-chave: Growth; Hatcheries; Nutrient deficiency; Nutritional requirements; Pathology; Parasitic diseases; Fish culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1478.pdf

Effects of dietary tannin on growth, feed utilization and digestibility, and carcass composition in juvenile European seabass ( Dicentrarchus labrax L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Omnes, Marie-helene; Le Goasduff, Julien; Le Delliou, Herve; Le Bayon, Nicolas; Quazuguel, Patrick; Robin, Jean.
Plant-based products in fish diets are valuable protein alternatives to fishmeal for the aquafeed industry. Many plant feed ingredients contain polyphenolic compounds, including tannins, which can have beneficial or adverse effects. The tolerable threshold of ingested tannins is unknown for marine carnivorous fishes. We studied the effects of tannic acid (TA) supplementation to the diet of juvenile European seabass (Dicentrarchus labrax) by measuring growth, feed utilization and digestibility, and carcass composition. We randomly allocated groups of fish (initial mean body weight of 10.2 ± 0.7 g; n = 40 fish per tank) to 12 replicate cylindrical-conical tanks (three per treatment). The fish were assigned to one of four dietary treatments for five weeks:...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Polyphenolic tannin; Growth; Digestibility; Carcass composition.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00374/48478/48767.pdf

Impact of nine macroalgal diets on growth and initial reproductive investment in juvenile abalone Haliotis tuberculata
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roussel, Sabine; Caralp, Claire; Leblanc, Catherine; Le Grand, Fabienne; Stiger-pouvreau, Valerie; Coulombet, Céline; Le Goïc, Nelly; Huchette, Sylvain.
The commercial culture of Haliotis tuberculata has recently started in Europe. As abalone is herbivorous, the use of local collected algae as feed may appear advantageous. The nutritional value of eight monospecific seaweed diets was studied using Palmaria palmata (Rhodophyta), filamentous algae, mainly Gracilaria sp. (Rhodophyta), Enteromorpha sp. and Ulva lactuca (Chlorophyta), together with Saccharina latissima, Saccorhiza polyschides, Laminaria digitata and Laminaria hyperborea (Ochrophyta, Phaeophyceae) and a mixed macroalgal diet. An integrative approach consisted in monitoring the seasonal composition changes of these algae in terms of protein, lipid, soluble carbohydrate, fatty acid and amino-acid contents, and to relate it to seasonal growth and...
Tipo: Text
Palavras-chave: Abalone; Algae; Reproduction; Growth; Protein.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62066/66246.pdf

ReMoNor : Mise en place et premier bilan du Reseau Mollusque de NORmandie (1998-1999)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ropert, Michel; Blin, J.l.; Cornette, Florence; Pacary, S; Pien, S; Leganeur, E; Kopp, Joel; Richard, O.
Since 1998, a growth and quality monitoring study of reared molluscs has been developped as part of a close collaboration between the Shellfish Research Laboratory of Normandy (IFREMER Port-en-Bessin, Calvados) and the SMEL (Syndicat Mixte d'Expansion du Littoral) Experimental Centre (Blainville, Manche). REMONOR (REseau MOllusque de NORmandie) is based on the experience gained through the national monitoring network REMORA, which protocol has been entirely applied. Adults and spat of Pacific oysters Crassostrea gigas were placed in 13 stations all along the oysters rearing areas of Normandy. These oysters had the same origin and history (i.e. age and weight) until they were dispatched on the 13 stations. 4 essential criteria were used to monitor rearing...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Croissance qualité; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-2248.pdf

Effect of chronic ammonia exposure on growth of European seabass (Dicentrarchus labrax) juveniles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lemarie, Gilles; Dosdat, Antoine; Coves, Denis; Dutto, Gilbert; Gasset, Eric; Person, Jeannine.
Chronic effects of ammonia were studied in juvenile seabass, Dicentrarchus labrax (mean weight= 11 g), exposed for 63 days to eight stable ammonia concentrations, ranging from 0.24 to 0.90 mg l(-1) unionised ammonia nitrogen (UIA-N), respectively, from 6.1 to 22.3 mg l(-1) total ammonia nitrogen (TA-N). Temperature (21.8 degreesC), pH (8.0), salinity (37.0 ppt), and oxygen concentration (over 80% saturation at the outlet) were maintained constant. Fish were fed using a self-feeder device, and they were starved during the last 8 days. Mortality of 28.9 and 42.6% occur-red within the first 8 days at the two highest UIA-N concentrations, respectively, 0.90 and 0.88 mg l(-1). From days 0 to 55, a 1.8-fold increase in weight gain was observed under the 0.90-mg...
Tipo: Text
Palavras-chave: Plasma ammonia; Growth; Seabass; Chronic toxicity; Ammonia.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-628.pdf

Croissance de la coque (Cerastoderma edule) en baie de Somme : Morphométrie et Marquage
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bellamy, Elise; Lefebvre, Alain; Mahe, Kelig; De Rafelis, Marc.
The bay of Somme is the first French field of cockles (Cerastoderma edule) with a production amounting to 3000 tons per year on average. In order to improve the stock management, it is necessary to increase our knowledge of this species. This study is looking at the growth of the common cockle. First, was carried out a morphometric analysis of the two left and right valves, which has revealed a perfect symmetry of the shell and has allowed us to establish strong correlations among the morphometric parameters. Then, a chemical marking study has been realized with calcein and manganese in order to obtain the exact growth. Calcein marking has showed a fluorescent stria only for an half hour immersion time at 150 mg.L-1. Likewise, the manganese marking has...
Tipo: Text
Palavras-chave: Coque; Cerastoderma edule; Croissance; Baie de Somme; Marquage; Calcéine; Manganèse; Fluorescence; Cathodoluminescence; Cockle; Cerastoderma edule; Growth; Bay of Somme; Marker; Calcein; Manganese; Fluorescence; Cathodoluminescence.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00007/11815/8542.pdf

Optimization of growth and bacteriocin activity of the food bioprotective Carnobacterium divergens V41 in an animal origin protein free medium
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brillet-viel, Anne; Pilet, Marie-france; Courcoux, Philippe; Prevost, Hervé; Leroi, Francoise.
Optimization of Carnobacterium divergens V41 growth and bacteriocin activity in a culture medium deprived of animal protein, needs for food bioprotection, was performed by using a statistical approach. In a screening experiment, twelve factors (pH, temperature, carbohydrates, NaCl, yeast extract, soy peptone, sodium acetate, ammonium citrate, magnesium sulphate, manganese sulphate, ascorbic acid and thiamine) were tested for their influence on the maximal growth and bacteriocin activity using a two-level incomplete factorial design with 192 experiments performed in microtiter plate wells. Based on results, a basic medium was developed and three variables (pH, temperature and carbohydrates concentration) were selected for a scale-up study in bioreactor. A...
Tipo: Text
Palavras-chave: Optimization; Carnobacterium; Bacteriocin; Experimental design; Bioreactor; Growth; Cold-smoked salmon.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00345/45615/45236.pdf

Étude dynamique de la population de Nucula nucleus (bivalve, protobranche) du cap de Flamanville (Manche)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chardy, Pierre; Guillaumont, Brigitte; Hamon, Dominique.
Annual production and turnover rate of biomass are estimated on a population of the bivalve, Nucula nucleus, dominant on the sublittoral area of Cap de Flamanville (Manche). Investigations on reproductive cycle established on the gonads maturity index over one year indicate a single spawning period in autumn. Age is determined from a study of the ring pattern on the shells, in which annual signification is outlined. The Von Bertalanffy curve and the exponential function give an adequate description of growth and mortality. The studied population is considered as near a theoretical population with constant recruitment and mortality; this simplification is discussed through the comparison of the demographie structures obtained in the same station in 1978 and...
Tipo: Text
Palavras-chave: Croissance; Mortalité; Productivité; Inférence statistique; Growth; Mortality; Productivity; Statistical inference.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00113/22411/20108.pdf

REMONOR : Résultats 2002. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Simonne, Charlotte; Pien, S; Hugonnet, Virginie; Le Gagneur, Eric; Ropert, Michel; Kopp, Joel; Richard, O.
The national REMORA network is targeted on the studies of growth, flesh quality and mortality of a sample of cupped oyster Crassostrea gigasdistributed on 9 stations along the coast of Normandy. As a better precision is needed for regional purpose, 7 new stations have been added. A total number of 16 stations is now sampled from Chausey to Meuvaines. Weak rates of mortality have been noticed in 2002 on both adults (7%) and spat (6 %). These rates are the weakest ever seen. The mortality rates in the Baie des veys were less than 10 %. This rearing area shows usually a much higher mortality level. Growth rates were noticed weaker than usual. They slowly decline from 1999. From Mach to December, the growth rate of adults has been computed to 0,21 %/day (for a...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2247.pdf

Changements ontogéniques de la condition larvaire chez une espèce de poisson à reproduction hivernale, le hareng des Downs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Denis, Jeremy.
The larval condition of Downs herring during the critical period was investigated between 2008 and 2015 in the eastern English Channel and Southern Bight of North Sea from data collected during the International Bottom Trawl Survey (IBTS). First, the study of the feeding strategy from gut contents analysis using two complementary approaches (electronical microscopy and measure of fluorescence) revealed a shift in the feeding diet occurring at a larval size of 13 mm. Smaller larvae had an omnivorous and a more diversified diet composed of numerous protist and small zooplanktonic preys whereas bigger larvae had a less diversified diet composed mainly of bigger zooplanktonic prey. Along with the diet shift, combination of four condition indices (ingestion...
Tipo: Text
Palavras-chave: Hareng des Downs; Condition larvaire; Nutrition; Croissance; Période critique; Manche-mer du Nord.; Downs herring; Larval condition; Feeding strategy; Growth; Critical period; English Channel-North Sea.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00386/49701/50227.pdf

Age, growth and mortality of the striped seabream   Lithognathus mormyrus   (Linnaeus, 1758) in the Gulf of Tunis (Central Mediterranean Sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Khaldi, Asma; Chater, Ines; Elleboode, Romain; Mahé, Kelig; Chakroun-marzouk, Nadia.
Despite the high commercial value of the striped seabream Lithognathus mormyrus (Linnaeus, 1758) in the Gulf of Tunis, biological data on its age, growth and exploitation rate are lacking. With the aim of estimating growth parameters, 516 individuals, ranging from 6–27.5 cm total length and from 3.5–293.5 g total weight, were collected from the artisanal fishing fleet between February 2014 and July 2016. The somatic growth presented a positive allometry and was described by the equation TW = 6.54 10−3TL3.213. The monthly analysis of the marginal increment of the otoliths revealed that only one annulus was deposited per year. The estimated von Bertalanffy growth parameters were: L∞ = 30.18 cm, k = 0.303 year−1 and t0 = −1.42 years. Total and natural...
Tipo: Text
Palavras-chave: Age; Growth; Gulf of Tunis; Lithognathus mormyrus; Lopt; Mortality; Otolithometry; Sparidae; Weight–length relationship.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00676/78770/80945.pdf

Lipid requirements of shrimp
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abramo D', L.
A review of lipid requirements of shrimp and other crustacean species, when applicable, is presented. Qualitative requirements of crustaceans for cholesterol, fatty acids and phospholipids have been documented, but quantitative requirements generally remain undefined. Potential interrelationships between different classes of lipids that may influence requirements as well as differences due to age and species need to be investigated. A more accurate definition of lipid requirements can be achieved by supporting traditional evaluations based upon weight gain and survival with biochemical or histological evidence.
Tipo: Text
Palavras-chave: Malacostraca; Biochemical analysis; Nutrients (mineral); Growth; Survival; Cholesterol; Fatty acids; Lipids.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1470.pdf

The use of high rate algal ponds for the treatment of marine effluent from a recirculating fish rearing system
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pagand, Pascal; Blancheton, Jean-paul; Lemoalle, J; Casellas, C.
A high rate algal pond (HRAP) system was used to treat effluent from a recirculating sea water aquaculture system in southern France. Dicentrarchus labrax L. were farmed at a high density, with effluents containing an average of 10 mg L-1 dissolved inorganic nitrogen (DIN) and 1.3 mg L-1 reactive phosphorus (RP). On a yearly basis, the algal pond removed 59% of the dissolved nitrogen and 56% of the phosphorus input, which was converted into 3.3 kg DW m(-2) algae. Green macroalgae were dominant throughout the year and the algal biomass mirrored the seasonal changes in daily irradiance and temperature. This first year study supports the possibility of treating marine aquaculture wastes using HPAPs, although conditions will have to be found to mitigate the...
Tipo: Text
Palavras-chave: Nitrogen; Biofilters; Irradiance; Temperature; Photosynthesis; Growth; Culture; Chlorophyta; Nutrient Removal.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-515.pdf

Relationships between age, growth, diet and environmental parameters for anchovy (Engraulis encrasicolus L.) in the Bay of Benisaf (SW Mediterranean, west Algerian coast)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacha, Mahmoud; Moali, Aissa; Benmansour, Nasr-eddine; Brylinski, Jean-michel; Mahe, Kelig; Amara, Rachid.
Age, growth and diet of anchovy were studied for the first time from samples collected in the Bay of Benisaf (west Algerian coast) during summer (spawning period) and autumn (recruitment period) 2007. Age structure and growth parameters were determined by otolith (sagitta) analyses. The von Bertalanffy growth function fitted to age-length data showed that most of anchovy growth is achieved during the first year of life, suggesting that this stock is primarily supported by the smallest age groups and has a strong dependence on recruitment. There were no significant differences between males and females, and pooled mean parameters were: L infinity = 15.61 cm, k = 0.75 per year and to, -1.32 years. Whatever the age-class anchovy is strictly zooplanktivorous....
Tipo: Text
Palavras-chave: Engraulidae; Engraulis encrasicolus; MED; West Algeria; Anchovy; Growth; Age; Diet; Ontogenetic.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12212/9046.pdf

Calcein staining of calcified structures in pearl oyster Pinctada margaritifera and the effect of food resource level on shell growth
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Linard, Clementine; Gueguen, Yannick; Moriceau, Jacques; Soyez, Claude; Hui, Belinda; Raoux, Aurore; Cuif, Jean Pierre; Cochard, Jean-claude; Le Pennec, Marcel; Le Moullac, Gilles.
Marine mollusc shell growth has been widely measured using fluorochrome marking. In order to test the efficiency and reliability of calcein staining on P. margaritifera shells and pearls, the present study examined two administration methods, different concentrations and several immersion times.Immersion in a 150 mg.L-1 calcein solution for 12 h to 24 h appeared to be the best method for marking P. margaritifera shells. For pearl marking, injection of a 200 mg.L-1 calcein solution into the pearl pouch was the optimal method. Calcein marking was then used to measure the influence of food resource levels on the shell growth. Groups of 23-month-old P. margaritifera were fed at three trophic levels for two months. The two highest food levels tested (6 000...
Tipo: Text
Palavras-chave: Bivalvia; Pearl; Shell; Growth; Scanning electron microscope.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00028/13907/11195.pdf

Growth and mortality of the European oyster Ostrea edulis in the Bay of Arcachon (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, René; Borel, Michel; Pichot, Yves; Trut, Gilles.
A study of the growth and mortality of the European oyster Ostrea edulis , including the effects of Marteilia refringens and Bonamia ostreae , was carried out in three oceanic areas in the Bay of Arcachon from May 1989 to February 1991. One-year-old spat, free from disease were used for the trials. Six months after beginning the trials, Marteilia refringens had severely infested the cultures. Although Bonamia ostreae was found during the first year, the rate of infestation was low. In the second year bonamiasis increased and high mortality (&gt; 60%) occurred in Ostrea edulis populations. Although the growth of the oysters was good, their condition index was generally poor. Moreover, shell perforations by Polydora sp. were observed. The influence of...
Tipo: Text
Palavras-chave: Ostrea edulis; Pathologie; Mortalité; Croissance; Reproduction; Composition biochimique; Bassin Arcachon; Ostrea edulis; Pathology; Mortality; Growth; Reproduction; Gross biochemical composition; Bay of Arcachon.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00015/12600/9477.pdf

Pheopigment dynamics, zooplankton grazing rates and the autumnal ammonium peak in a Mediterranean lagoon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Collos, Yves; Husseini Ratrema, Julie; Bec, Béatrice; Vaquer, André; Hoai, Thong Lam; Rougier, Claude; Pons, Virginie; Souchu, Philippe.
The dilution technique was used to estimate chlorophyll and pheopigment, net and gross production as well as zooplankton grazing over a 12-month period in a coastal lagoon in Southern France. Chlorophyll a (Cha) based gross growth rates of phytoplankton ranged from undetectable in February to 2.6 day(-1) in June, corresponding to 3.8 divisions per day. Cha-based grazing rates ranged from undetectable in February to 1.1 d(-1) in June. The seasonal growth pattern of picoplankton was similar to that of the whole community, with a peak in July, corresponding to four divisions per day. Grazing processes represented from 20 to 150% of the phytoplankton daily growth, and the grazing pressure was stronger on small phytoplankton cells than on larger cells. Gross...
Tipo: Text
Palavras-chave: Zooplankton; Ammonium; Pheopigments; Degradation; Growth; Phytoplankton.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-727.pdf

Relationships between growth, survival, physiology and behaviour — A multi-criteria approach to Haliotis tuberculata phenotypic traits
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lachambre, Sebastien; Huchette, Sylvain; Day, Rob; Boudry, Pierre; Rio-cabello, Antoine; Fustec, Timothee; Roussel, Sabine.
Abalone growth rate is often identified among important traits to improve through selective breeding. However, the rapid success of some selective breeding plans has sometimes led to negative effects in some aquaculture species due to trade-offs. One of them is the loss of homeostasis of selected animals which results in the inability to resist the stress experienced during the rearing process. In this context, this study aimed to analyze the phenotypic relationships between growth, and physiological and behavioural traits in Haliotis tuberculata under stressful conditions. Eleven traits related to growth, immunity, reproduction and behaviour were recorded under laboratory conditions. A total of 120 adults from wild or farm origin were first monitored...
Tipo: Text
Palavras-chave: Haliotis tuberculata; Growth; Behaviour; Physiology; Multivariate analysis; Phenotyping.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00333/44434/44101.pdf

Trophic relationships between benthic or planktonic microphytes and infaunal bivalve molluscs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plantecuny, M; Bodoy, Alain.
In order to estimate energetic relationship, microphytic and benthic bivalve levels of a shallow (1.5 m), sandy ecosystem near Marseille (Gulf of Fos, Southern France) were sampled monthly during 1.5 year, in two sites differing by their wave exposure. In the sheltered area, the bivalve Ruditapes decussatus was the dominant species, while another bivalve, Donax trunculus , was found in the open, wave exposed site. Chlorophyll a and primary production of the phytoplankton and the microphytobenthos, as well as population dynamic, growth and biochemical composition of bivalves (lipids, proteins and carbohydrates) were monitored.
Tipo: Text
Palavras-chave: Ruditapes decussatus; Bivalvia; Periphyton; Phytoplankton; Biochemical composition; Growth; Marine molluscs; Hydrodynamics; Seasonal variations; Primary production; Trophic relationships.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1528.pdf

Shedding light on the river and sea lamprey in western European marine waters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Elliott, Sam; Deleys, Noemie; Rivot, E; Acou, A; Réveillac, E; Beaulaton, L.
Lampreys are ancestral jawless vertebrates with particularly complex life histories. Population declines resulting from increased anthropogenic pressure have been observed. For semelparous diadromous lampreys, the marine phase remains largely a black box, making targeted management and conservation measures difficult to implement. Here, we collated a database of 168904 hauls from both fisheries-dependent and fisheries-independent surveys between 1965 and 2019. Lampreys were observed in only 254 hauls (&lt;1% lamprey presence); 421 sea lamprey Petromyzon marinus and 300 European river lamprey Lampetra fluviatilis were identified. Sizes ranged from 13 to 92 cm and from 14 to 42 cm, respectively. The majority of lampreys (61%) were caught by mobile demersal...
Tipo: Text
Palavras-chave: Endangered species; Lamprey; Distribution; Ecology; Growth; Migration; Surveys.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00691/80277/83361.pdf

REMORA 94. Analyse des résultats de la seconde année du réseau de suivi de la croissance de l'huître creuse sur les côtes françaises
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goyard, Emmanuel.
The Aquaculture Resources department Mollusc Network (REMORA ) has been monitoring in 1994 like in 1993 the growth of homogeneous batches of Crassostrea gigas (initially 18 months old, same origin, same history, same size) in the main French production areas. The monitored parameters deal with growth, morphology, survival, composition and parasite infestations. The comparison between two rearing conditions (traditional bags versus wooden plate to which individuals were stuck) demonstrated like in 1993 improved growth rate (which could also be explained by the lower local density) and a tendency for the oysters to become wider on plates (which is probably related to the absence of shell erosion). Major regional characteristics are revealed by the analysis,...
Tipo: Text
Palavras-chave: Growth; Crassostrea gigas; Cupped oyster; Oyster culture; Monitoring network; Croissance; Crassostrea gigas; Huître creuse; Ostréiculture; Réseau.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/rapport-1650.pdf

Production of live prey for marine fish larvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kraul, S.
Tropical marine fish larvae vary in their requirements for live planktonic food. Selection of live prey species for culture depends on larval size and larval tolerance of water quality. This report describes some of the cultured prey species, and their uses and limits as effective food for fish larvae. Methods are presented for the culture of phytoplankton, rotifers, copepods, and other live feeds.
Tipo: Text
Palavras-chave: Brine shrimp culture; Diets; Prey selection; Food organisms; Feeding; Growth; Rearing; Nutritional requirements; Fish larvae; Marine fish; Tropical fish.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1443.pdf

The time course of fish oil wash-out follows a simple dilution model in gilthead sea bream (Sparus aurata L.) fed graded levels of vegetable oils
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benedito-palos, Laura; Navarro, Juan C.; Bermejo-nogales, Azucena; Saera-vila, Alfonso; Kaushik, Sadasivam; Perez-sanchez, Jaume.
The aim of the study was to determine whether changes in the tissue fatty acid (FA) profile follows a simple test dilution model after changing the dietary oil sources in gilthead sea bream. A 14-month trial was conducted with juvenile fish of 18 g initial body weight fed either a fish oil-based diet (FO diet) or vegetable oils replacing 33% (33VO) and 66% (66VO) of fish oil. The trial included 3 months feeding a fish oil finishing diet to follow the restoration of the FA profile with the FO diet. Fish oil replacement with/without a finishing phase of fish oil re-feeding did not affect growth and all groups reached 520-531 g body weight. Changes in body composition with weight gain did not modify the FA profile of fish continuously fed FO, 33VO or 66VO...
Tipo: Text
Palavras-chave: Plant proteins; Fatty acids; Flesh; Growth; Fish.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6318.pdf

What is the heritable component of spinal deformities in the European sea bass (Dicentrarchus labrax)?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bardon, Agnes; Vandeputte, Marc; Dupont-nivet, Mathilde; Chavanne, Herve; Haffray, Pierrick; Vergnet, Alain; Chatain, Beatrice.
Malformations in farmed fish are a prime research topic as it has a major impact on fish welfare and on the economical value of the product. In this study, the genetic component of spine deformities was estimated in European sea bass, a major species of Mediterranean aquaculture, with the use of a posteriori reconstruction of pedigree with microsatellites. Our population exhibited a very high malformation rate (81%),probably due to intense swimming of fish during pre-growing The heritability of global spine deformities was evaluated to be 0.21 +/- 0.04 on the underlying scale (033 +/- 0.06 for lordosis, 0.13 +/- 0.04 for scoliosis). Deformities scored by an internal or external examination turned out to be genetically the same trait (genetic...
Tipo: Text
Palavras-chave: Genetic correlations; Heritability; Growth; Deformities; Dicentrarchus labrax; European sea bass.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6768.pdf

Modélisation écologique des populations de palourdes roses (Paphia rhomboïdes) et d'amandes de mer (Glycymeris glycymeris) en Manche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Savina, Marie.
Diversity and abundance of the benthic fauna in the Channel Sea have favoured the development of fisheries, particularly those of shellfish (scallop, warty venus, common cockle, dog cockle, banded carpet shell, surf clam...) and also attracted the interest of scientists. Some large scientific programs were carried out in the seventies to study benthos distribution in this area. Among the main listed bivalves, the dog cockle (Glycymeris glycymeris) and the banded carpet shell (Paphia rhomboïdes) are particularly widespread in the Channel Sea and in the "Golfe Normand-Breton", where they are ones of the most abundant species in terms of biomass. In view of their halieutic interest and the existence of an important database describing their distribution,...
Tipo: Text
Palavras-chave: Shellfish fisheries; Growth; Ecophysiology; Distribution of benthic invertebrates; Numerical ecological space distributed deterministic modelling; Glycymeris glycymeris; Paphia rhomboïdes; Golfe Normand Breton; Channel Sea; Exploitation des bivalves sauvages; Croissance; Ecophysiologie; Répartition des invertébrés benthiques; Modélisation numérique écologique spatialisée déterministe; Glycymeris glycymeris; Paphia rhomboïdes; Golfe Normand Breton; Manche.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/2004/these-1.pdf

Croissance de l'huitre japonaise Crassostrea gigas en cylindre rotatif Stanway. Premiers resultats en France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Rene; Maurer, Daniele.
A new method of oyster cultivation, the Stanway oyster cylinder, has been experimented in the basin of Arcachon since the autumn of 1989. The first observations on three species of juvenile bivalves showed that this system could be successfully used with the Japanese oyster Crassostrea gigas . A comparative study of the growth of this last species, reared in cylinders and oyster bags, has been carried out since spring 1990. The first results showed that the growth of juveniles and 18 months old oysters in cylinders is not as good as in bags. On the other hand, mortality did not differ between both techniques: less than 3%. This new system seems to be less efficient than the traditional French way of rearing oysters. However, an improvement in the quality...
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalvia; Juveniles; Oyster culture; Growth; Rearing.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-917.pdf

Facteurs contrôlant la croissance de Ruditapes philippinarum dans 4 nurseries de production en Charente-Maritime (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Deslous-paoli, Jean-marc; Garnier, Jacqueline; Prioul, Daniel; Heurtebise, Serge; Razet, Daniel.
Different types of pregrowth of the Japanese palourde are compared on the some site. The method by upwelling which is the more common used, to have good growth, requires a compromise between the running and the raised biomass.  Two periods are critical, in the summer the growth of mollusks is stopped because of a decrease in the phytoplanktonic production ;  in the winter, a fall in temperature lessens filtration and stops growth. The results concern clams consummatation rates of particular food (chlorophyll, protids, lipids, glucids) as weIl as the way to supply the decreasing growth : increase of phytoplankyonic production in the summer by recycling waters from nurseries that are loaded with ammoniac and raise winter temperatures by using under-ground...
Tipo: Text
Palavras-chave: Nursery; Growth; Ruditapes philippinarum; Clams; Nurserie; Croissance; Ruditapes philippinarum; Palourdes.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/acte-2951.pdf

Etude et modélisation des mécanismes impliqués dans la croissance de l'huître perlière, Pinctada margaritifera, au sein de l'écosystème conchylicole du lagon de l'atoll de Takapoto (Polynésie Française)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pouvreau, Stephane.
L'huître perlière, Pinctada margaritifera (Linné, 1758) var. cumingi (Reeve), productrice de perles noires, fait l' objet d'une aquaculture florissante en Polynésie Française. Afin de pérenniser cette activité, un programme de recherche (le PGRN) a été lancé, en 1990, sur l' atoll de Takapoto. L' un des thèmes de ce programme réside dans l'étude de la capacité trophique d'un lagon soumis à une activité de perliculture. A cet égard, un modèle déterministe expliquant la croissance et la reproduction de P. margaritifera à partir des paramètres du milieu (notamment la nourriture disponible) a été mis au point. La construction de ce modèle a impliqué : ( 1) l'analyse de l'hydrobiologie du lagon; (2) l'étude de la physiologie de P. margaritifera; (3) le sui vi...
Tipo: Text
Palavras-chave: Bivalves; Huîtres perlières; Pinctada margaritifera; Physiologie; Croissance; Reproduction; Hydrobiologie; Atoll; Lagon; Écosystème; Réseau trophique; Modélisation; Capacité trophique; Polynésie française; Bivalves; Pearl oyster; Pinctada ma rgaritifera; Physiology; Growth; Reproduction; Hydrobiology; Atoll; Lagoon; Ecosystem; Trophic web; Modelling; Carrying capacity; French Polynesia.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00034/14558/11856.pdf

Les ages de Niphargus virei (crustace, stygobie)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Turouin-buffiere, M.
The life-span of Niphargus virei is estimated with the length histograms of annual summer samples; it fits in with the data of rare spring distributions and with the growth observed in the laboratory. Increase in body wet weight confirms the low growth rate of this species (maximum: 0.06 mg/day); the mean age of populations changes on account of rainfall, which determines the drift of part of the population out of its natural habitat.
Tipo: Text
Palavras-chave: Niphargus virei; Malacostraca; Mortality; Body size; Longevity; Growth.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1396.pdf

Salinity tolerance, ontogeny of osmoregulation and zootechnical improvement in the larval rearing of the Caledonian Blue Shrimp, Litopenaeus stylirostris (Decapoda, Penaeidae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pham, Dominique; Charmantier, Guy; Wabete, Nelly; Boulo, Viviane; Broutoi, Francis; Mailliez, Jean-rene; Peignon, Jean-marie; Charmantier-daures, Mireille.
The ontogeny of osmoregulationwas investigated in Litopenaeus stylirostris by studying salinity tolerance and osmoregulatory capacity. Shrimp at different larval and postlarval stages were exposed to various salinities and survival was monitored for 24 h. Survival rates exceeded 80% at salinity over 25 ppt (750 mOsm.kg(-1)) at all the stages. At salinities below to 25 ppt, salinity tolerance was higher in nauplii and zoeae than in mysis larvae. Postlarval stages were able to withstand lower salinities, e.g. 6.0 ppt (176 mOsm.kg(-1)) at PL9 stage, but they were more sensitive than larvae to salinities over 35 ppt (1035 mOsm.kg(-1)). Zoea and mysis larvae slightly hyper-regulated at all tested salinities. After metamorphosis, postlarvae progressively...
Tipo: Text
Palavras-chave: Penaeid; Litopenaeus stylirostris; Ontogeny; Osmoregulation; Growth.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00107/21843/20058.pdf

REMONOR : Résultats 2003. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Simonne, Charlotte; Pien, S.; Hugonnet, Virginie; Le Gagneur, Eric; Ropert, Michel; Kopp, Joel; Richard, O.
The network named REMONOR (REseau MOllusqueNORmandie) aims to assess mortality, growth and tissue quality of the Pacific oyster, Crassostrea gigas, cultivated in Normandy over an annual cycle. This local network relies on the same material and methods as the national one named REMORA (REseau Mollusques Ressources Aquacoles). The study was carried out in 17 sites, which were distributed in the four basins where oyster rearing occurs in Normandy (West and East coast of Cotentin, Baie des Veys and Meuvaines). In 2003, a new site was added, which was located in the area of Ver-Sur-Mer (Calvados). The results obtained in 2003 showed a low annual mortality for adults (8%) as well as for juveniles (10%). Growth was also low for the two age classes of oyster...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/rapport-2246.pdf

Modélisation de la résistance aux chocs de salinité des postlarves de Penaeus vannamei
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aquacop, Aquacop; Le Moullac, Gilles; Damez, D.
The notion of penaeid shrimp postlarvae quality, which implies a survival potential, is still a subjective parameter. The zootechnical criteria and the visual observations are not sufficient to evaluate the physiological condition of the hatchery reared postlarvae. The resistance of postlarvae to salinity shocks is a representative criteria of their condition. The goal of this study is to present a non-linear regression model at 2 variables (size, salinity) for the P. vannamei postlarvae resistance to salinity shocks. Between the second and the twentieth day after metamorphosis; 5 salinity shocks (20, 15, 10, 5 and 20/00) were tested daily, each one with 50 postlarvae. Survival rates were recorded after 2 hrs. Concurrently, the postlarvae growth in the...
Tipo: Text
Palavras-chave: Salinity; Resistance; Growth; Postlarvae; Penaeus vannamei; Salinité; Résistance; Croissance; Postlarve; Penaeus vannamei.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-4430.pdf

Immunoreactive human growth hormone like peptides in tropical Penaeids and the effect of dietary hGH on Penaeus vannamei larval development
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Toullec, J. Y.; Le Moullac, Gilles; Cuzon, Gerard; Van Wormhoudt, A.
Human growth hormone like peptides were present in Penaeus indicus as two molecular forms: one with a molecular weight about 25 kDa which is similar to that of the vertebrate growth hormone and a smaller form of 2 kDa. Quantitative variations of hGH-like peptides in different larval stages of three species of Penaeids (Penaeus vannamei, P. stylirostris, P. indicus) suggest a possible involvement of hGH-like peptides in the development. Human growth hormone (hGH) supplementation in the diet of Penaeus vannamei larvae seems to have a positive effect on the size and on the quality of the animals estimated by their resistance to salinity stress.
Tipo: Text
Palavras-chave: Growth hormone; Growth; P. indicus; P. stylirostris; P. vannamei; Penaeids; Hormone de croissance; Croissance; P. indicus; P. stylirostris; P. vannamei; Pénéides.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-4429.pdf

Genetic bases and variability of physiological traits involved in growth in Crassostrea gigas - Third Progress Report 1st January-31st December 1998 - Contract N°FAIR 95-421 Commission of the European Communities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerard, Andre; Boudry, Pierre; Bougrier, Serge; Buestel, Dominique; Samain, Jean-francois; Hawkins, A. J. S.; Wilins, N.; Zouros, Eleftherios; Bonhomme, Francois; Thiriot Quievreux, Catherine.
The EU project "GENEPHYS", initiated by the IFREMER laboratory GAP-La Tremblade (Génétique Aquaculture et Pathologie) and CREMA-l'Houmeau (Centre de Recherche en Ecologie Marine et Aquaculture), aims to establish the relationships between physiological traits involved in growth (oxygen consumption, absorption efficiency, scope for growth) and their genetic bases (determinism, variability within and among populations) in cupped oyster Crassostrea gigas. The main bjectives are : 1. To express the maximum variability of growth, both at the larval stage and at the adult stage, in a oyster population originating from parents of various origins. 2. To check the persistence over the time, of growth performance and related physiological functions. 3. To explain...
Tipo: Text
Palavras-chave: Genetic; Determinism; Variability; Physilogy; Oxygen consumption; Growth; Absorption efficiency; Oysters; Crassostrea gigas.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00050/16151/13634.pdf

Magnetic resonance imaging as a means to assess the body growth and the gonad development of the oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hatt, Philippe-jacques; Davenel, Armel; Eliat, Pierre-antoine; Quellec, Stephane.
To make a preliminary exploration of the possibilities and limits of magnetic resonance imaging (MRI) for assessing body growth and gonad development of the Pacific oyster, Crassostrea gigas, individual monitoring was conducted on diploid and triploid oysters in their second year, maintained from February to October in a pond on the French Atlantic coast. Magnetic resonance imaging was done on each oyster on five dates during the study period. From these images, variations in the volumes of the flesh, digestive gland-gonad and adductor muscle, and the surface of the gills were measured over time. Apart from the well known differences between diploids and triploids related to maturation of gametes, other original observations of assessing growth were made...
Tipo: Text
Palavras-chave: Crassostrea gigas; Oyster; Gonad development; Growth; Magnetic resonance imaging; MRI.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6872.pdf

REseau MOllusques des Rendements Aquacoles de l'huître creuse Crassostrea gigas sur les côtes françaises (REMORA). Résultats des stations nationales et régionales dans la lagune de Thau pour l'année 2002.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Gall, Patrik; Lagarde, Franck; Pichot, Yves; Grizel, Henri; Hamon, Pierre-yves; Vercelli, Catherine.
This report presents the main results for 2002 of the eight points in the Lagune de Thau, in accordance with the monitoring network REMORA: 3 national points and 5 regional added by the «Laboratoire Conchylicole de Méditerranée». Only adults batch is observed in the Mediterranean sea. This year the mortality ratio is low (&lt; 5 %), without significant differences between areas. Like for the whole national network, the average individual weight are less than previous years in Bouzigues and Marseillan area ; in opposite Mèze area has better results. Bouzigues area presents the best productivity rate (3.1) and the worst in the middle of the zone. The AFNOR index, calculed in December, allows to classify the oysters like "spéciales". The best values are...
Tipo: Text
Palavras-chave: REMORA; Méditerranée.; Huître creuse; Crassastrea gigas; Mortalité; Qualité; France; Lagune de Thau; Croissance; REMORA; France; Mediterranean Sea; Lagune de Thau; Crassos/rea gigas; Mortality; Growth; Quality; Polvdora sv.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00113/22385/20080.pdf

Détermination de l'âge et de la croissance de Buccinum undatum L. (Gasteropoda : Prosobranchia) à l'aide des isotopes stables de la coquille et de l'ornementation operculaire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Santarelli, Leonardo; Gros, Philippe.
This paper presents a simple method of individual age determination of the gastropod Buccinum undatum, based on the counting of operculum striae. The validation of this method is achieved by the use of several unrelated approaches. As a first step, oxygen stable isotopie analysis is used to check shell records of seasonal temperature fluctuations. We then establish a geometrie correspondence between simultaneously elaborated parts of the shell and the operculum, and show that the mean periodicity of operculum striae formation is annual. With the help of complementary data collected on the fishing grounds, and also of a biometrical study, it is further shown that the age criterion is marked during the warmer months of the year, between June and October....
Tipo: Text
Palavras-chave: Analyse isotopique; Buccin; Structures annuelles; Croissance; Inférence statistique; Isotopie analysis; Whelk; Annual increments; Growth; Statistical inference.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00112/22308/19982.pdf

Spatio-temporal changes in mortality, growth and condition of the pacific oyster, Crassostrea gigas, in Normandy (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Royer, J; Ropert, Michel; Costil, K.
Summer mortalities have been observed in French shellfish areas (including Normandy) since 1994, but origin of this syndrome remains unclear and is suspected to be caused by a combination of several interacting extrinsic (biotic and abiotic) and intrinsic (genetic, physiological, immunological) factors. The French research program, MOREST aimed to identify the origin of oyster summer mortality along the French coast, focusing on the interactions between oysters, their pathogens, and the environment. The present study analyzed spatio-temporal variation in growth, condition and mortality in spat, and half-grown and market-sized oysters reared from February 2000 to October 2003 at six stations within two different areas in the Bay of Veys, Normandy: Grandcamp...
Tipo: Text
Palavras-chave: France English Channel; Growth; Summer mortality; Crassostrea gigas; Oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-4733.pdf

Heritabilities and GxE interactions for growth in the European sea bass (Dicentrarchus labrax L.) using a marker-based pedigree
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dupont Nivet, M; Vandeputte, Marc; Vergnet, Alain; Merdy, O; Haffray, P; Chavanne, H; Chatain, Beatrice.
253 full-sib families from 33 males and 23 females of European seabass were produced in a partly factorial mating design. All fish were reared in the same tank during 14 months, then 7000 of them were dispatched in four farms to different locations (France, Israel, Italy, Portugal) representing a wide variety of environmental conditions. Around 400 g mean weight, 1177 to 1667 fish in each site were weighed and length was measured. Condition factor (K) was calculated. Pedigrees were redrawn a posteriori using microsatellites markers: parental origin could be retraced for 99.2% of fish. Due to a high incidence of deformities, the useful sample size was reduced to 491-670 fish per site.   Maternal effects were small. Using a simple animal model, heritability...
Tipo: Text
Palavras-chave: Microsatellites; GxE interactions; Heritability; Growth; Seabass; Dicentrarchus labrax.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4404.pdf

Geographic variability of sardine growth across the northeastern Atlantic and the Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Silva, A; Carrera, P; Masse, Jacques; Uriarte, A; Santos, M; Oliveira, P; Soares, E; Porteiro, C; Stratoudakis, Y.
This study describes broad-scale spatial variations in sardine growth across the northeastern Atlantic and Mediterranean waters using opportunistic samples collected in recent years. More detailed information on spatial, decadal and seasonal growth variations is provided for the Iberian-Biscay region using data collected in acoustic surveys since the mid-1980s. Growth curves are fitted to annual or monthly length-at-age data using a robust Von Bertalanffy model; parameters for recent samples are compared with literature information using an auximetric plot while differences between areas within the Iberian-Biscay region are tested by log-likelihood ratio tests. Sardine growth performance is generally lower in the Mediterranean and declines across the...
Tipo: Text
Palavras-chave: Iberian Biscay region; Spatio temporal variation; Growth; Sardina pilchardus.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4078.pdf

Toxicity of ammonia to turbot juveniles: I. effects oil survival, growth and food utilisation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Person-le Ruyet, Jeannine; Delbard, Christine; Chartois, Herve; Le Delliou, Herve.
Long-term effects of constant exogenous ammonia concentrations were investigated in two different batches of turbot juveniles (53 and 73 g) under controlled environmental and feeding conditions. Over the 84-day experiments, ambient un-ionized ammonia (UIA-N, NH3) concentrations were steady (coefficient of variation, 12-16 %) and water pH range was 7.88-7.99. Survival was maximum up to 0.33 mg.l(-1) UIA-N and at 0.73, 50 % mortalities were observed on day 52 (73 g) or day 77 (53 g). No-growth concentration was 0.73 mg.l(-1) UIA-N in the two groups and the 84-day lowest-observable-effect concentration range 0.14-0.33 mg.l(-1). In the most tolerant group (53 g), the 84-day no-observable-effect concentration was 0.14 mg.l(-1) UIA-N. The estimated 28-day...
Tipo: Text
Palavras-chave: Azote ammoniacal; Toxicité chronique; Taux de survie; Croissance; Alimentation; Ammonia; Chronic toxicity; Survival rate; Growth; Food efficiency; Psetta maxima.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00188/29882/28354.pdf

REMORA. Résultats de l'année 93
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Littaye-mariette, A.
What is REMORA? REMORA &amp;#8722;REseau MOllusques du département Ressources Aquacoles&amp;#8722; (Aquaculture Resources Department Mollusc Network) is a surveillance network dedicated to the growth of hollow oysters Crassostrea gigas. In the past and in most production areas, observations were made on a regular basis. In 1993, homogenising experimental protocols between the different laboratories involved was decided, as well as using a common initial oyster batch, therefore organizing a network covering all of the French coasts. This network aims at providing, each year, the production's basic characteristics found in main oyster beds (growth reference). It also better characterizes variations and shows potential tendencies.
Tipo: Text
Palavras-chave: France; Growth; Network of  monitoring; Crassostrea gigas.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/rapport-1754.pdf

Le développement de la mytiliculture sur filières en Bretagne. Bilan des travaux
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Omnes, Marie-helene.
Le bilan du suivi des élevages de moules sur filières montre l'évolution de cette nouvelle pratique culturale en Bretagne et met en évidence les difficultés qui demeurent un frein au développement et à l'extension de ce type d'élevage. Il s'agit en particulier de l'influence du milieu pour certains sites (contamination par le "Dinophysis"), de problèmes biologiques et surtout d'ordre pathologique, liés à de fortes infestations des moules par un vers parasite de la famille des trématodes et responsable de mortalités élevées pour les secteurs Sud-Bretagne. Le choix de l'espèce se précise : les producteurs se tournent vers l'élevage de la moule locale captée naturellement sur les installations. Celle-ci a une meilleure tenue sur les supports et à la...
Tipo: Text
Palavras-chave: Mytiliculture; Filières; Croissance; Trématodes; Développement; Mussel farming; Long-lines; Growth; Trematodes; Development.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00052/16310/13803.pdf

Données économiques maritimes françaises 2016
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kalaydjian, Regis; Girard, Sophie.
The "French Maritime Economic Data" report is periodically published by Ifremer since 1997. It presents an economic assessment of the French maritime activities, their position in the national economy and in the world competition, as well as the significance of non market public services. Maritime activities in the industrial sector are assessed using a standard metrics to facilitate the periodical update of the report: turnover, gross value added, employment, number of enterprises, exports. These indicators are expressed at national level. The public sector is described by annual budgets, number of staff and personnel costs, broken down into the different public policy functions. Regional indicators are provided on activities whenever relevant and...
Tipo: Text
Palavras-chave: Economie; Concurrence; Croissance; Emploi; Environnement; Europe; France; Industrie; Marin; Maritime; Valeur ajoutée; Secteur public; Services.; Economy; Competition; Employment; Environment; Europe; France; Growth; Industry; Marine; Maritime; Public sector; Value added; Services.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00388/49962/50614.pdf

Manual of Fish Sclerochronology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Panfili, Jacques; De Pontual, Helene; Troadec, Herve; Wrigh, Peter J.
Sclerochronology, the study of calcified structures to reconstruct the past history of living organisms, is central to fish biology and fisheries management. This manual aims to provide an overview of the current theoretical and practical aspects of sclerochronological studies. By providing information on the nature of calcified structures (otoliths, scales, skeleton), their uses in fish research and methods for preparation and examination, the manual constitutes a comprehensive guide for researchers, technicians and students either new to the field or interested in expanding their range of expertise. The enclosed multimedia version (DVD) is supplemented by videos illustrating the main technical procedures with an alternative navigation mode based on...
Tipo: Text
Palavras-chave: Age; Age determination; Biological aging; Chemistry; Growth; Otolith reading; Otoliths; Scale reading; Scales; Skeleton.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00017/12801/9742.pdf

Comparaison des performances d'élevage de moules en 4 sites mytilicoles de la baie de Vilaine, de février 2000 à février 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazurie, Joseph; Bouget, Jean-francois; Claude, Serge; Fleury, Pierre-gildas; Langlade, Aime.
Mussel samples have been placed in plastic-mesh bags hung on wood poles (« bouchots »), at 4 locations of a mussel culture area in the bay of Vilaine (South Brittany, France). They have been monitored for one year, from February 2000 to February 2001. The recorded growth have been rather fast (plus 1.2 g per month between April and September), and mortalities moderate (between 15% to 25%), with better results in southern stations, further from the estuary.  Among the physico-chemical parameters recorded, the most striking were very low salinities (below 10 g/l) recorded for days, after heavy rains. They provoqued a valve closure of mussels (recorded by a « valvometer »). Some physiological indicators being tested (muscle force and hermeticity) seemed to...
Tipo: Text
Palavras-chave: Valve movements; Hermeticity; Muscle strength; Mortality; Growth; South Brittany; Bay of Vilaine; Mytilus edulis; Mussel; Écartements valvaires; Herméticité; Force musculaire; Mortalité; Croissance; Bretagne sud; Baie de Vilaine; Mytilus edulis; Moule.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-6373.pdf

Aneuploidy and its relationship with growth in different populations of the Pacific oyster (Crassostrea gigas, Thunberg)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boudry, Pierre; Leitao, Alexandra; Mccombie, Helen; Thiriot-quievreux, Catherine.
Cytogenetic abnormalities arising both in mitosis and meiosis are known to be common in bivalves. Here we review result obtained from the observations of somatic aneuploidy in different populations of the commercially important Pacific oyster, Crassostrea gigas. The oysters studied were either (1) produced in IFREMER hatcheries between 1986 and 1999, (some of these were part of the EU funded programme GENEPHYS); or (2) collected from wild populations along the French Atlantic coast. Chromosome numbers were scored from 30 mitotic metaphases in gill tissue per  individual studied. Aneuploid cells (2n - X) were observed in all the 13 populations studied. A highly significant negative correlation was observed between the level of aneuploidy and growth, i.e....
Tipo: Text
Palavras-chave: Growth; Genetic; Aneuploidy; Crassostrea gigas; Pacific oysters.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/acte-3446.pdf

Modeling Japanese oyster physiological processes under natural tidal variation in suspended particulate matter
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barille, Laurent; Prou, Jean.
Feeding and growth of the Japanese oyster Crassostrea gigas is simulated by a deterministic model. However, physiological processes, estimated by statistical relationships, have not been tested under extreme environmental conditions such as high level of suspended particulate matter. Ecophysiological experiments were therefore conducted in situ in the Bay of Marennes-Oléron during a spring and neap tide cycle in May 1991, to get a better representation of 2 important components of the energy budget of the Japanese oyster: clearance rate and selection efficiency. The relationships previously established by Raillard et al. (1993) are re-evaluated by integrating the action of high seston load, typical of tidal effect within estuaries, on the physiological...
Tipo: Text
Palavras-chave: Tidal cycles; Oysters culture; Growth; Feeding; Energy budget; Ecophysiology.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/acte-3827.PDF

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; Résultats des stations nationales. Année 2000
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Cornette, Florence; Claude, Serge; Palvadeau, Hubert; Robert, Stéphane; D'Amico, Florence; Le Gall, Patrik; Vercelli, Catherine.
The monitoring network IFREMER /REMORA is assessing, on a yearly basis, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year old ; and "adults" = two-years old), distributed among various stations of the main French oyster areas. Samplings are carried out in March, June, September and December. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be considered as an accurate estimation of professional oyster ongrowings. With the exception of Spring mortalities due to poor initial quality of adult oysters and to difficulties in the counting of juveniles, the year 2000 appeared to be a year of low mortality. 2000 is a year of poor growth (61.5 g in average weight in...
Tipo: Text
Palavras-chave: Polydora; Quality; Growth; Mortality; Crassostrea gigas; Cupped (gigas) oyster; France; REMORA; Polydora; Qualité; Croissance; Mortality; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-1635.pdf

Croissance, engraissement et mortalité de l'huître creuse Crassostrea gigas en baie de Bourgneuf  : comparaison de quatre secteurs ostréicoles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Haure, Joel; Baud, Jean-pierre.
A study on mortalities, growth and fattening of the oyster Crassostrea gigas was carried out spring with the autumn 1987 in four sites of bay of Bourgneuf. Mortalities, more important in spring, prove to be higher in the sectors North compared to the Southern sectors of bay of Bourgneuf.  The performances of growth are rather weak when they are compared with other French oyster sectors. They however present a better production in the cattle-breeding areas located at the South of bay. The spring phase is marked by the formation of glucidic reserves, at the moment of the reheating of water, which is quickly transformed, in the majority of the sites, in lipids of reserves of the ovocytes, during the gamétogenèse.   The state of fattening of Crassostrea gigas...
Tipo: Text
Palavras-chave: Fattening; Oyster; Mortality; Growth; Bay of Bourgneuf; Crassostrea gigas; Engraissement; Huitre; Mortalité; Croissance; Baie de Bourgneuf; Crassostrea gigas.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-1646.pdf

Evidence of differential chromosome loss in aneuploid karyotypes of the Pacific oyster, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leitao, Alexandra; Boudry, Pierre; Thiriot Quievreux, Catherine.
The G-banding technique was performed on aneuploid karyotypes from gill tissue of the Pacific oyster, Crassostrea gigas, to assess whether chromosome losses could be explained by differential chromosomal susceptibility and to clarify the negative correlation between aneuploidy and growth rate previously reported in different populations of this oyster. The study of 95 G-banded aneuploid karyotypes showed that only 4 of the 10 chromosome pairs (viz. 1, 5, 9, and 10) of C. gigas were affected by the loss of one homologous chromosome. Pairs 1, 9, and 10, which were lost in 56, 33, and 44% of cases, respectively, may be considered to be differentially affected. Hypotheses on this differential chromosomal susceptibility are discussed.
Tipo: Text
Palavras-chave: Oyster; Karyotype; G banding; Growth; Aneuploidy; Huître; Caryotype; Bandes G; Croissance; Aneuploïdie.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-742.pdf

Influence du taux de proteines sur la croissance ponderale de Palaemon serratus (Pennant) elevee au laboratoire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Campillo, Albert; Luquet, P.
The quantitiative requirements for protein have been determined in P. serratus reared from the post-larval stage to the 4th month. It appears that the apparent optimum percentage of protein in the diet is a minimum of 60%. At the 8th month, the mean wt of prawn reared with the best artificial diet (diet IV) is only 49% of the wt of shrimp reared with the digestive gland of Patella as a diet. The prawns reared to 4th month on a low-protein diet then reared on a natural diet until the 8th month, show important compensatory growth. However, the prawns do not achieve the wt of the control population, their average wt representing only 16% of the controls.
Tipo: Text
Palavras-chave: Crangon crangon; Penaeus japonicus; Homarus vulgaris; Palaemon serratus; Nutritional requirements; Growth; Proteins; Artificial feeding; Crustacean culture; Laboratory culture; Rearing.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-2029.pdf

Toxicity of Epoxiconazole to the Marine Diatom Chaetoceros calcitrans: Influence of Growth Conditions and Algal Development Stage
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Amara, Anis; Quiniou, Francoise; Durand, Gael; El Bour, Monia; Boudabous, Abdellatif; Hourmant, Annick.
The triazole fungicide epoxiconazole is extensively used to control fungi on crops and may present some potential risk from runoff on coastal ecosystems located close to agricultural areas. Phytotoxicity assessments were conducted on the marine diatom Chaetoceros calcitrans using both the active ingredient and its formulated product (Opus). The 3-day EC50 using cell count was 2.31 mg/L for epoxiconazole active ingredient and 2.9 mu g/L for epoxiconazole-formulated. The fungicide produced an increase of cellular volume, pigment (chlorophylls a, c, and carotenoids) content, ATP synthesis, and rates of photosynthesis and respiration. Progressive algal cell recovery from epoxiconazole effects occurred after 3 days, with the increasing cell density. Differences...
Tipo: Text
Palavras-chave: Age cell; Chaetoceros calcitrans; Culture conditions; Epoxiconazole; Growth; Physiological parameters.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00130/24105/22491.pdf

Variation in life-history traits of European anchovy along a latitudinal gradient: a bioenergetics modelling approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huret, Martin; Tsiaras, K; Daewel, U; Skogen, Md; Gatti, Paul; Petitgas, Pierre; Somarakis, S.
Anchovy Engraulis encrasicolus distribution in European waters spans from the Mediterranean Sea to the North Sea, and is expected to expand further north with global warming. Observations from the eastern Mediterranean (North Aegean Sea), the Bay of Biscay and the North Sea reveal latitudinal differences in growth, maximum size, fecundity and timing of reproduction. We set up a mechanistic framework combining a bioenergetics model with regional physical-biogeochemical models providing temperature and zooplankton biomass to investigate the underlying mechanisms of variation in these traits. The bioenergetics model, based on the Dynamic Energy Budget theory and initially calibrated in the Bay of Biscay, was used to simulate growth and reproduction patterns....
Tipo: Text
Palavras-chave: Engraulis encrasicolus; Countergradient variation; Growth; Reproduction; Dynamic Energy Budget theory; Bay of Biscay; Aegean Sea; North Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00504/61564/65489.pdf

Le merlu du golfe de Gascogne et de la mer Celtique : Croissance, Répartition spatiale et bathymétrique, Ecologie alimentaire et Assemblages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kacher, Mohamed.
In the Bay of Biscay and Celtic Sea waters, hake is considered as genetically homogeneous and form a unique stock with identical meristic characteristics. The vertebral mean vary from 50,68 (vertebrae) during the first year of life to 51,11 (vertebrae) for adults. 0-group Merluccius display a rapid growth with significant interannual variability (0.71 mm.day-1 in 2001 versus 0.74 mm.day-1 in 2002). The spawning period occurs in April and the average length on the firth January following the hatching is of 17.3 cm (first seasonal check / increment on the sagittal otolith is located about 0.143 cm from the nucleus). At the end of the first year of life the average length is about 24 cm. The longevity of the species is important and growth parameters (L =...
Tipo: Text
Palavras-chave: Celtic sea; Bay of biscay; Ecologie; Juvéniles; Otolith; Growth; Assemblages; Hake; Mer celtique; Golfe de Gascogne; Ecologie; Juvéniles; Otolithe; Croissance; Assemblages; Merlu.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/these-1247.pdf

Mortalité et croissance de l'huître creuse C. gigas dans le bassin de Marennes Oléron. Résultats obtenus sur le site atelier de Ronce-Perquis en 1997-1999
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Razet, Daniel; Geairon, Philippe; Robert, Stephane; Goulletquer, Philippe; Taillade, Sylvie.
The 1999 monitoring of the C. gigas mortality rates showed a 32 to 40% loss for the on-bottom rearings located on the Ronce-Perquis oyster bank. In 1997, the averaged mortality rate varied between 23 and 29% without significant site effect. These mortality rates were ranging from 17 to 32% in 1998 with significant limited mortality rate on site 4 (17%). However, those rates were underestimated by 7 to 8%, based on our 1999 study, Actually, the spatial distribution for these rates on 2 experimental sites divided into 25 subunits demonstrated a large variability ranging from 17-37% and 22-56% for sites 1 and 2, respectively. In spite this large variability, the mortality rates results were larger on the muddy bottom site. In contrast to site 1, the oysters...
Tipo: Text
Palavras-chave: Bay of Marennes Oleron; Crassostrea gigas; Reproductive effort; Biochemical composition; Growth; Sampling strategy; Mortality rates; Bassin de Marennes Oléron; Crassostrea gigas; Effort de reproduction; Composition biochimique; Croissance; Méthodologie d'estimation; Taux de mortalité.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-1641.pdf

Un essai de grossissement en captivite de la tortue verte Chelonia mydas realise a Tahiti (Polynesie Francaise)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lebeau, Alain.
A small batch of green turtle hatchlings, Chelonia mydas , have been raised in captivity at the "Centre Oceanologique du Pacifique", in Tahiti from 1983 to 1984. Observations on growth and rearing conditions are reported. This experiment shows the technical feasibility of this type of aquaculture in French Polynesia. The economical aspect is considered. Forty-six young green turtles between one- and two-years-old have been tagged and released in the neighboring Mehetia Island (French Polynesia).
Tipo: Text
Palavras-chave: Chelonia mydas; Reptilia; Hatching; Rearing; Growth; Artificial feeding; Turtle culture.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1798.pdf

La mytiliculture dans la Manche. Biomasses en élevage et croissance de Mytilus edulis L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goulletquer, Philippe; Joly, Jean-pierre; Le Gagneur, Eric; Ruelle, Francois.
This report describes the mussel Mytilus edulis sampling stock strategy developed to carry out stock assesments along the French Normandy coastline between 1989 and 1993. The overall totalnetweight reached 13,992 metric tons in 1993 with 27% precision level. Simultaneously, a growth study was carried out on 36 experimental sites to estimate overall variability. Individual total weight varied from 6.6 to 12 g at rearing cycle completion. An empirical management model conceming the Western Cotentin rearing areas was proposed and explained 68% of total weight variance. Based on a stepwise multilinear relationship, the model linked overall growth performance to local stocking density, tidal distribution, and distance from the main runoffs inputs. It aims to...
Tipo: Text
Palavras-chave: Mytilus edulis; Manche; Stock; Croissance; Mytilus edulis; Manche; Stocking density; Growth.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00072/18360/15932.pdf

Etude des bases génétiques de la mortalité estivale et des relations avec la croissance chez les juvéniles de l'huître creuse Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Degremont, Lionel.
In order to study genetic variability for survival during summer mortality events in the oyster Crassostrea gigas, a first generation (G1) was bred in 2001. 17 G1 half-sib families (HSF) were obtained ; each HSF was reared in three sites along the French coast during the summer period. Significant differences in survival were observed among HSF indicating a genetic basis for survival. In 2002, several HSF were selected on their survival performances to constitute a divergent selection (G2) (outbreed and inbred). Significant differences in survival were found among these offspring of the 'high' and 'low' selected groups in several laboratory experiments and in all sites. Growth performance was not influenced by selection on survival. This confirms the...
Tipo: Text
Palavras-chave: Juvenile; Genetic; Growth; Summer mortality; Crassostrea gigas; Juvéniles; Héritabilité; Rendement; Croissance; Mortalités estivales; Crassostrea gigas.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/these-202.pdf

Étude biométrique de la croissance d'Eledone cirrhosa [LAM. 1978 (Cephalopoda, Octopoda)] du golfe du Lion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Moriyasu, M.
Tipo: Text
Palavras-chave: Sex ratio; Croissance; Modèle de Von Bertalanlfy; Céphalopodes; Méditerranée; Sex ratio; Growth; Von Benalanlfy's model; Cephalopoda; Mediterranean.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00120/23145/20990.pdf

Body size and temperature effects on standard metabolic rate for determining metabolic scope for activity of the polychaete     Hediste (Nereis) diversicolor
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lopes Galasso, Helena; Richard, Marion; Lefebvre, Sebastien; Aliaume, Catherine; Callier, Myriam.
Considering the ecological importance and potential value of Hediste diversicolor, a better understanding of its metabolic rate and potential growth rates is required. The aims of this study are: (i) to describe key biometric relationships; (ii) to test the effects of temperature and body size on standard metabolic rate (as measure by oxygen consumption) to determine critical parameters, namely Arrhenius temperature (TA), allometric coefficient (b) and reaction rate; and (iii) to determine the metabolic scope for activity (MSA) of H. diversicolor for further comparison with published specific growth rates. Individuals were collected in a Mediterranean lagoon (France). After 10 days of acclimatization, 7 days at a fixed temperature and 24 h of fasting,...
Tipo: Text
Palavras-chave: Annelida; Deposit-feeder; Oxygen consumption; Allometric coefficient; Arrhenius temperature; Aerobic scope; Growth.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00465/57682/59885.pdf

Une technique de lecture d'age des raies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Du Buit, M; Maheux, F.
Description of a technique for including and preparing small cross sections of ray vertebra. The observation of the rings growth is performed after staining with cobalt nitrate and safranine. This method is applied to the observation of the growth rings in the vertebra of Raja naevus.
Tipo: Text
Palavras-chave: Raja naevus; Staining; Growth; Vertebrae; Age determination.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1792.pdf

Review and current status of the aquaculture potential for the mahimahi, Coryphaena hippurus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kraul, S.
The mahimahi, Coryphaena hippurus , has excellent potential for aquaculture due to its fast growth (2 kg at 6 months, 9 kg at 1 year), good food conversion efficiency (30%, wet weight), high fecundity with natural captive spawns (200,000 eggs/female/2 days year round for a 1 year old female), and high price (US$ 9.00/kg wholesale in Hawaii).
Tipo: Text
Palavras-chave: Copepoda; Rotifera; Coryphaena hippurus; Coryphaenidae; Pisces; Artificial feeding; Diets; Spawning; Fingerlings; Females; Eggs; Food; Food conversion; Hatcheries; Nutritional requirements; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1473.pdf

Traitement par lagunage a haut rendement algal (LHRA) des effluents piscicoles marins recycles: évaluation chimique et écotoxicologique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deviller, Genevieve.
World aquaculture is a fast growing activity and the control of its waste becomes a key issue. Compared to traditional systems, recirculating systems allow to reduce replacement water and waste volumes. Nevertheless their effluents are more concentrated in dissolved nutrients (nitrate, phosphate). The high rate algae pond (HRAP) is one of the possible treatment technique to remove those nutrients. During this work, three rearing systems: one recycled, one recycled with HRAP and one open as a standard, were operated for one year to assess the impact of: (1) the reuse of treated effluent on survival, growth and nutrition of sea bass (2) the rearing system on fish health using multibiomarkers and trace metals accumulation responses and (3) best conditions for...
Tipo: Text
Palavras-chave: Aquaculture; Fish; Growth; Metals; Biomarker; Water treatment; Recirculating effluent; High rate algal pond; Aquaculture; Poisson; Croissance; Métaux; Biomarqueur; Epuration; Effluent recyclé; Lagunage à haut rendement algal.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2004/these-163.pdf

Multi-site evaluation of the rearing performances of 5 wild populations of European sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandeputte, Marc; Garouste, Romain; Dupont-nivet, Mathilde; Haffray, Pierrick; Vergnet, Alain; Chavanne, Herve; Laureau, Stanislas; Ron, Tetsuzan Benny; Pagelson, Glen; Mazorra, Carlos; Ricoux, Remi; Marques, Pedro; Gameiro, Marta; Chatain, Beatrice.
Sea bass is a major species in Mediterranean aquaculture, but has a distribution area ranging from North Atlantic to South Mediterranean, with a population structure previously revealed by population genetics. To test the farming performances of wild sea bass populations, we produced a partial diallel cross mating scheme, using sires originating from North Atlantic (NAT), South Atlantic (SAT), West Mediterranean (WEM), North-East Mediterranean (NEM) and South-East Mediterranean (SEM). Fifteen sires per origin were mated in a full-factorial design using artificial fertilization with 9 NAT dams and 17 WEM dams, producing 10 population crosses and 1950 potential full-sib families. All fish were reared together, then tagged at an average weight of 20 g and...
Tipo: Text
Palavras-chave: European sea bass; Dicentrarchus labrax; Selective breeding; Growth; Processing yields; Genotype by environment interaction.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28265/26514.pdf

ReMoNor : Résultats 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cornette, Florence; Blin, J.l.; Pien, S; Simonne, Charlotte; Kopp, Joel; Richard, O.
The regional network REMONOR showed 2001's characteristics of growth and quality of oysters (Crassostrea gigas) in the three rearing areas of Normandy. Compared to year 2000, two additional stations along the East Coast have been settled. The summer adults mortalities have been registered between 0 % and 25 %. The average for all the rearing areas reached 6 %. Highest rates have been noticed in the Baie des Veys and the East Coast. The juvenile's mortality occurred during the same season, in summer. This year 2001 is included in lower growth years in all Normandy. This year, the West Coast growth rate appeared to be quit unusual. For the first time growth rates were in the average in the northern area that usually shows very bad performance. We can...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-2249.pdf

Effects of O-2 supersaturation on metabolism and growth in juvenile turbot (Scophthalmus maximus L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Person, Jeannine; Pichavant, Karine; Vacher, Coralie; Le Bayon, Nicolas; Severe, Armelle; Boeuf, Gilles.
Effects of O-2 supersaturation on metabolism and growth were studied in juvenile turbot (Scophthalmus maximus L.). When fish were reared for 30 days in water containing O-2 at 147% or 223% air saturation, there were no significant differences in food intake, growth, food conversion or protein utilization compared to fish exposed to normoxia (100% air saturation in water outlet). Exposure to hyperoxia resulted in increased body fat deposition. Daily rates of O-2 consumption of resting fish were not affected by O-2-concentrations, and there were no significant differences in rates of nitrogenous excretion among fish exposed to the different O-2-concentrations. Turbot tolerated severe hyperoxia, 350% air saturation, for 10 days.There were changes in acid-base...
Tipo: Text
Palavras-chave: Ion regulation; Acid base; Metabolism; Growth; Hyperoxia; Turbot.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-627.pdf

Differential influence of life cycle on growth and toxin production of three   Pseudo-nitzschia   species (Bacillariophyceae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sauvey, Aurore; Claquin, Pascal; Le Roy, Bertrand; Le Gac, Mickael; Fauchot, Juliette.
We used a multi‐strain approach to study the intra‐ and interspecific variability of the growth rates of three Pseudo‐nitzschia species – P. australis, P. fraudulenta, and P. pungens – and of their domoic acid (DA) production. We carried out mating and batch experiments to investigate the respective effects of strain age and cell size, and thus the influence of their life cycle on the physiology of these species. The cell size ‐ life cycle relationship was characteristic of each species. The influence of age and cell size on the intraspecific variability of growth rates suggests that these characteristics should be considered cautiously for the strains used in physiological studies on Pseudo‐nitzschia species. The results from all three species do not...
Tipo: Text
Palavras-chave: Cell size; Domoic acid; Growth; Life cycle; Pseudo-nitzschia strains.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61679/65622.pdf

Application of a dynamic energy budget model to the Pacific oyster, Crassostrea gigas, reared under various environmental conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pouvreau, Stephane; Bourles, Yves; Lefebvre, Sebastien; Gangnery, Aline; Alunno-bruscia, Marianne.
The Dynamic Energy Budget (DEB) model (Kooijman, S.A.L.M., 1986. Energy budgets can explain body size relations. J. Theor. Biol. 121, 269¿282; Kooijman, S.A.L.M., 2000. Dynamic Energy and Mass Budgets in Biological Systems. Cambridge University Press, Cambridge, 424 pp.) has been adapted to describe the dynamics of growth and reproduction of the Pacific oyster (Crassostrea gigas) reared in different areas under conditions ranging from controlled to natural. The values of the model parameters were estimated from available physiological data and from published information. The sets of data used to validate the model came from three long-term growth experiments (&gt; 5 months) performed on Pacific oysters reared under different conditions of food and...
Tipo: Text
Palavras-chave: Reproductive effort; Reproduction; Growth; Ecophysiology; Dynamic energy budget; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1817.pdf

REMONOR : résultats 2005. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mary, Charlotte; Pien, S; Blin, J.l.; Ropert, Michel.
The regional monitoring network REMONOR, relying on the experience of IFREMER's REMORA national network, each year assesses the mortality, growth and quality for two age classes ("adults" = 2 years and "juveniles" = 1 year) of cup oysters, distributed among various farm sites in the main oyster farming sectors of Lower Normandy.  This network, led in collaboration by LERN (Environment Resources Laboratory) and SMEL (Coastline Installations Public-Private Entity), this year welcomes a new farm site in Veules les Roses, in Seine Maritime (76), bringing to 18 the total number of monitored sites. For operational reasons, a reduced monitoring protocol was conducted in 2005 on this last farm site, which will not take on the network's standardised protocol until...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2212.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; résultats des stations NATIONALES ; Année 2002
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Simonne, Charlotte; Claude, Serge; Palvadeau, Hubert; Guilpain, Patrice; D'Amico, Florence; Le Gall, Patrik; Vercelli, Catherine; Pien, S.
The monitoring network IFREMER /REMORA is assessing, on a yearly basis two oyster batches ("juveniles" = one-year old ; and "adults" = two-years old), distributed among various stations of the main French oyster areas. Samplings are carried out in March, June, September and December. In this way this network assess seasonal mortality, growth and quality of cupped oysters, in which it is a tool for trend estimations, and then for ecosystem management or scientific studies. However, it must not be considered as an accurate estimation of professional oyster ongrowings. 2002 has been a year of very few mortality (6% in average for "adults" and 11% for juveniles). Only 2 batches were over 15% mortality. The mortality is a bit higher in juveniles batches' with 5...
Tipo: Text
Palavras-chave: Polydora; Quality; Growth; Mortality; Crassostrea gigas; Cupped (gigas) oyster; France; REMORA; Polydora; Qualité; Croissance; Mortalité; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2439.pdf

Réseau national de suivi des performances de l'huître creuse (Crassostrea gigas). Synthèse des résultats des stations nationales REMORA. Année 2006
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bedier, Edouard; Claude, Serge; Simonne, Charlotte; D'Amico, Florence; Palvadeau, Hubert; Guilpain, Patrice; Le Gall, P; Pien, S.
En 2006, le cheptel d'origine d'huîtres adultes présentait un poids moyen individuel de 28,8g. La mise à l'eau s'est effectuée entre le 13 et le 17 mars 2006 sur les stations Manche et Atlantique et le 20 mars en Méditerranée. Au niveau national, la croissance observée en 2006 pour les adultes s'avère bonne, avec des valeurs supérieures à la moyenne en Normandie (+9,6%), en Bretagne Nord (+24,7%) et dans les Pays de la Loire (+11,7%). En revanche, les performances sont médiocres dans le bassin d'Arcachon (-13,3%). En Méditerranée, le poids atteint en décembre est plus faible que la normale (-8,5%), en raison des conditions de malaïgues qui ont prévalu sur l'étang de Thau. Sur les autres secteurs, les croissances sont moyennes. Les mortalités observées chez...
Tipo: Text
Palavras-chave: Remora; Qualité; Croissance; Mortalité; Basse Normandie; Remonor; Huître creuse; Crassostrea gigas; Remora; Quality; Growth; Mortality; Normandy; Remonor; Cupped (gigas) oyster; Crassostrea gigas.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-3642.pdf

Comparing growth in surface and cave morphs of the species Astyanax mexicanus: insights from scales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Simon, Victor; Elleboode, Romain; Mahe, Kelig; Legendre, Laurent; Ornelas-garcia, Patricia; Espinasa, Luis; Retaux, Sylvie.
Background Life in the darkness of caves is accompanied, throughout phyla, by striking phenotypic changes including the loss or severe reduction in eyes and pigmentation. On the other hand, cave animals have undergone constructive changes, thought to be adaptive, to survive in this extreme environment. The present study addresses the question of the evolution of growth in caves, taking advantage of the comparison between the river-dwelling and the cave-dwelling morphs of the Mexican tetra, Astyanax mexicanus. Results A sclerochronology approach was undertaken to document the growth of the species in these two very distinct habitats. Scales from 158 wild Astyanax mexicanus specimens were analyzed from three caves (Pachón, Tinaja and Subterráneo) and two...
Tipo: Text
Palavras-chave: Cave; Fish; Size; Age; Scales; Growth; Food; Comparative biology; Life history traits.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00412/52337/53124.pdf

Do protein hydrolysates improve survival and growth of newly-hatched spotted, wolffish (Anarhichas minor), a non-metamorphic aquaculture fish species?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Savoie, A; Le Francois, Nathalie; Cahu, Chantal; Blier, P; Andreassen, I.
Despite larval robustness characterized by the absence of metamorphosis and readiness for exogenous feeding based on commercial feed, the spotted wolffish (Anarhichas minor) displays highly variable survival at first-feeding. In this study, we investigated the use of three dietary concentrations of protein hydrolysates (PH, pre-digested proteins) (0, 10 and 20%) when newly hatched juvenile wolffish were held at three different rearing temperatures namely, 5, 8 and 12 degrees C to determine whether digestion of protein was a limiting factor for fish growth and survival. Final weights for fish at 5, 8,and 12 degrees C at day 60 were respectively 0.35, 1.19 and 2.02 g. Mean specific growth rates were 1.97, 4.01 and 4.88%/day and survival rates were 49.8, 53.4...
Tipo: Text
Palavras-chave: Survival; Growth; First feeding; Protein hydrolysates; Spotted wolffish; Anarhichas minor.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2141.pdf

Growth and survival rates of carpet shell clam (Tapes decussatus Linnaeus, 1758) using various culture methods in Sufa (Homa) Lagoon, Izmir, Turkey
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Serdar, Serpil; Lok, Aynur; Kose, Aysun; Yildiz, Harun; Acarli, Sefa; Goulletquer, Philippe.
The carpet shell clam (Tapes decussatus Linnaeus, 1758) is a candidate species for aquaculture development in Turkish waters. Our study aimed to assess the efficiency of three different methods (i.e., net, box and fenced ground) to maximize clam production. Two different net materials (hard plastic net and polyamide net) were tested in the net method trials. Conducted over 1 year between October 2001 and October 2002, an initial calibrated clam population, characterized by a 26.25 ± 0.035 mm shell length and 3.85 ± 0.06 g total wet weight was sampled on a monthly basis to carry out the experiments. By the end of the rearing cycle, clams reached 34.13 ± 0.38 mm and 9.09 ± 0.27 g in shell length and total wet weight, respectively. Significant differences in...
Tipo: Text
Palavras-chave: Survival rate; Growth; Culture method; Sufa lagoon; Clam; Tapes decussatus.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3111.pdf

L'aquaculture du Macrobrachium rosenbergii aux Antilles Francaises
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lacroix, Denis.
The aquaculture of Macrobrachium rosenbergii is launched in Martinigue by the regional council in 1976. A first "green water" type hatchery is built and provides juveniles to the first ponds. In 1978, CNEXO is asked to cooperate in scientific assistance. A new hatchery is built with COP "clear water" system and produces in 1980. The development of ponds (20 ha) needs the increase of the hatcheries capacity, which is now done with one single method and intensive larval first stage (7-8 millions PL. cap). In Guadeloupe, the first ponds started in 1978. Two cooperatives and 11 ha of ponds at this time have determined the construction of CNEXO in the construction of a regional hatchery. A small light one is already under production since July 83.
Tipo: Text
Palavras-chave: Macrobrachium rosenbergii; Malacostraca; Growth; Hatcheries; Aquaculture systems; Aquaculture development; Guadeloupe; Production Martinique; Grossissement; Écloserie; Macrobrachium.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1194.pdf

Comparative effects of long-term hypoxia on growth, feeding and oxygen consumption in juvenile turbot and European sea bass
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pichavant, Karine; Person, Jeannine; Le Bayon, Nicolas; Severe, Armelle; Le Roux, Annick; Boeuf, Gilles.
When juvenile turbot Scophthulmus maximus and sea bass Dicentrarchus labrax were fed to satiation, growth and food intake were depressed under hypoxia (3.2 +/- 0.3 and 4.5 +/- 0.2 mg O-2 l(-1)). However, no significant difference in growth was observed between fishes maintained in hypoxia and fed to satiation and fishes reared in normoxia (7.4 +/- 0.3 mg O-2 l(-1)) and fed restricted rations (same food intake of fishes at 3.2 mg O-2 l(-1)). Routine oxygen consumption of fishes fed to satiation was higher in normoxia than in hypoxia due to the decrease in food intake in the latter. Of the physiological parameters measured, no significant changes were observed in the two species maintained in hypoxia. This study confirms the significant interaction between...
Tipo: Text
Palavras-chave: Oxygen consumption; Growth; Hypoxia; Sea bass; Turbot.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-617.pdf

Etude de la croissance et de l'activité écophysiologique des huîtres creuses Crassostrea gigas, Crassostrea angulata et de leurs hybrides en système contrôlé
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Haure, Joel; Huvet, Arnaud; Palvadeau, Hubert; Nourry, Max; Martin, Jean-louis; Boudry, Pierre; Penisson, Christian.
A comparative study of the growth of the oysters Crassostrea gigas, Crassostrea angulata and their hybrids was carried out in 1999 in system controlled with contribution of the micro alga Skeletonema costatum. The results showed significant differences of the pondéral growth of the four studied progenies. The animals C. gigas had growth rates 1.4 times greater than C. angulata oysters. The hybrid progenies were shown more powerful than Portuguese oysters but are not different from the Japanese oysters. The ecophysiologic study showed that the averages of filtration and oxygen uptake, obtained by means of a three hours recording, cannot differentiate the four studied progenies. On the other hand, the calculation of the FTA (Feeding Time Activity) allowed to...
Tipo: Text
Palavras-chave: Skeletonema costatum; Hybrids; Crassostrea angulata; Crassostrea gigas; Ecophysiology; Growth; Skeletonema costatum; Hybrides; Crassostrea angulata; Crassostrea gigas; Ecophysiologie; Croissance.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-1636.pdf

Effects of dissolved mercury on embryogenesis, survival and growth of Mytilus galloprovincialis mussel larvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beiras, R; His, Edouard.
The effects of Hg concentrations ranging from 0 (control) to 1024 mu g l(-1) upon embryogenesis, survival and growth of Mytilus galloprovincialis mussel larvae were investigated. Embryogenesis was abnormal in 50% of the individuals at 10 mu g l(-1). The 48 h LC(50) for D-shaped, early umbonate, late umbonate and eyed larvae were 51, 164, 322 and 383 pg l(-1) respectively. The LC(50) was an allometric function of ash-free dry weight with exponent b = 0.60. Larval growth was significantly reduced after 6 d exposure to 4 mu g Hg l(-1) and after 10 d exposure to 2 mu g l(-1). No significant differences in lethal or sublethal sensitivity to Hg were found between M. galloprovincialis and previously studied Crassostrea gigas embryos and larvae. The implications...
Tipo: Text
Palavras-chave: Mercury; Mytilus; Mussel; Larva; Growth; Embryo; Bioassay; Ecotoxicology.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00258/36946/35665.pdf

Spatial variation in growth, maturation schedules and reproductive investment of female sole Solea solea in the Northeast Atlantic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mollet, Fabian M.; Engelhard, Georg; Vainikka, Anssi; Laugen, Ane; Rijnsdorp, Adriaan D.; Ernande, Bruno.
Latitudinal variation in life-history traits is often explained by phenotypically plastic responses or local adaptations to different thermal regimes. We compared growth, maturation schedules and reproductive investment of female sole Solea solea between 8 populations, covering much of the species' distribution in northern Europe, with respect to thermal gradients. An energy allocation model was fitted to size–age data, and probabilistic maturation reaction norms were estimated from size–age–maturity data. We found that northern populations from colder environments had higher rates of energy acquisition and reproductive investment, an intrinsic tendency to mature earlier, and had smaller asymptotic sizes than southern populations from warmer environments....
Tipo: Text
Palavras-chave: Countergradient variation; Phenotypic plasticity; Growth; Maturation reaction norm; Temperature; Mortality-induced evolution.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00124/23523/21360.pdf

Age precision and growth rate of Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red Sea, Egypt
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Osman, Yassein A. A.; Mehanna, Sahar F; El-mahdy, Samia M; Mohammad, Ashraf S; Mahe, Kelig.
The age and growth of the haffara seabream, Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red sea, Egypt, were investigated using a sample of 466 specimens. The fish length varied between 12.7 and 27.2 cm and the weight from 38.1 to 293.2 g. Samples were collected from the artisanal fisheries during the fishing season from August 2018 to July 2019. The relationship between the body lengths (total, fork and standard length in cm) and the body weight (g) was found to be significant (p &lt; 0.05). The relationship between the body length and weight regarding the sex effect was insignificant for all samples (log W- log TL, ANCOVA, p &gt; 0.05). The relationship between length and weight was estimated by a power regression function, with a...
Tipo: Text
Palavras-chave: Age precision; Growth; Rhabdosargus haffara; Hurghada; Red Sea; Egypt stock assessment.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00623/73484/72774.pdf

Effects of temperature on the growth of pollack (Pollachius pollachius) juveniles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Person, Jeannine; Buchet, Vincent; Vincent, Benoit; Le Delliou, Herve; Quemener, Loic.
Growth of juvenile pollack was assessed at five constant temperatures (9, 12, 15, 18 and 21 degrees C) in an 84-day trial. Duplicate groups of 75 fish (initial weight 143 +/- 2 g) were held in O-2 saturated water (102-103% saturation) and fed to apparent satiation. Growth increased as temperature increased from 9 degrees C up to a plateau at 12-15 degrees C (NS differences between 12 and 15 degrees C) followed by a decrease from 18 degrees C. No growth occurred at 21 degrees C. For the overall period, specific growth rates were 0.52% and 0.53% day(-1) at 12 and 15 degrees C compared to 0.40% day(-1) at 18 degrees C. Feed intake was maximum at 15-18 degrees C (0.68-0.69% day(-1)) and it was significantly lower at 21 degrees C (0.45% day(-1)). Apparent feed...
Tipo: Text
Palavras-chave: Feed efficiency; Growth; Temperature; Pollack.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1122.pdf

Comparison of brown trout (Salmo trutta) reared in fresh water and sea water to freshwater rainbow trout (Oncorhynchus mykiss) .1. Growth and nitrogen balance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dosdat, Antoine; Metailler, Robert; Desbruyeres, Elisabeth; Huelvan, Christine.
Brown trout and rainbow trout (average weight 100 g) were reared in fresh water at 12 degrees C under the same conditions before transfer of brown trout to sea water, in order to compare nitrogen utilisation in the two species. Apparent protein digestibility (ADC), nitrogen (ammonia and urea) excretion, protein productive value (PPV) and actual observed nitro en mass balance were determined. Rainbow trout raised in fresh water had a higher growth rate (1.1 vs 0.8%. d(-1)), better food conversion ratio (0.7 vs 1.0), better ADC (91 vs 85%) and PPV (45 vs 35%) and lower ammonia excretion rates than brown trout reared in fresh water. Transferring brown trout to sea water induced lower PPV (30%) and ammonia and urea excretion. Salinity did not modify metabolic...
Tipo: Text
Palavras-chave: Truite commune; Truite arc-en-ciel; Excrétion; Ammoniaque; Urée; Digestibilité; Croissance; Rétention protéique; Rainbow trout; Brown trout; Excretion; Ammonia; Urea; Digestibility; Growth; Protein productive value.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00188/29885/28342.pdf

Croissance des huîtres creuses, Crassostrea gigas, en baie du mont Saint-Michel, avant la restructuration de 2004
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bouget, Jean-francois; Mazurie, Joseph.
This study presents the main results of oyster growth obtained experimentally in 2002 and 2003, in the farming area of Cancale before the leases reorganization of 2004. According to the REMORA monitoring network from 1990 to 2004, the oyster growth in Cancale bay may be characterized by an average annual weight gain (around 30g per year), a rather weak meat content compared to other regional oyster sites, and an exceptional quality of shell (absence of blisters, few Poly do rd). Spatially, the oyster farming area of Cancale shows rather homogeneous performances of breeding, in spite of the muddy southern area. In addition an experimental trial in 2003 allowed to evaluate favourably the potential of the new oyster area of Saint-Benoît : in these...
Tipo: Text
Palavras-chave: Mont Saint Michel; Crassostrea gigas; Growth; Breeding; Oyster; Mont Saint Michel; Crassostrea gigas; Croissance; Ostréiculture; Huître.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-1637.pdf

In modelling effects of global warming, invalid assumptions lead to unrealistic projections
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lefevre, Sjannie; Mckenzie, David J.; Nilsson, Goeran E.
Tipo: Text
Palavras-chave: Climate change; Fish; Growth; Metabolism; Modelling; Oxygen uptake; Scaling; Warming.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00426/53762/54697.pdf

Influence of phytoplankton diet mixtures on microalgae consumption, larval development and settlement of the Pacific oyster Crassostrea gigas (Thunberg)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rico Villa, Benjamin; Le Coz, Jean-rene; Mingant, Christian; Robert, Rene.
Microalgae commonly used as feed for bivalves, Pavlova lutheri (P), Isochrisis affinis galbana (T) and Chaetoceros calcitrans forma pumilum (Cp), were fed to Pacific oyster Crassostrea gigas to assess their nutritional value for larval development and metamorphosis during two experiments. Monospecific, bispecific and trispecific diets were firstly evaluated during 3 weeks from D larvae to young postlarvae. Then bispecific diets, based on different T and Cp proportions, were assessed during a similar period. Concurrently, ingestion was studied through the whole larval and postlarval development for each diet and/or diet mixture. Because lipids are assumed to be a key nutrient for bivalves, biochemical analysis was undertaken on the second set of trials...
Tipo: Text
Palavras-chave: Lipids; Grazing; Metamorphosis; Growth; Larvae; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1707.pdf

Croissance et qualité de l'huître Crassostrea gigas Thunberg en élevage dans le bassin de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deslous-paoli, Jean-marc.
In 1979-1980, the main growth o oysters Crassostrea gigas, in the basin of Marennes-Oleron occured in June and July. The available amount of food and the energetic requirements for the reproduction are important factors determining growth. Tissue weight decreased after spawning until the end of the winter, and this decrease might be related to the high quantities of inorganic particles, in the seston, at that period of the year.
Tipo: Text
Palavras-chave: Marennes Oleron; Seston; Growth; Crassostrea gigas; Oysters; Marennes Oléron; Seston minéral; Croissance; Crassostrea gigas; Huîtres.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-2947.pdf

Aspects biométriques et biochimiques de la croissance de l'huître Crassostrea virginica en élevage suspendu à Solomons (Baie de Chesapeake)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goulletquer, Philippe; Prou, Jean; Heral, Maurice.
Growth and proximate biochemical composition of the American oyster Crassostrea virginica were studied in the Patuxent river (Maryland), located in the middle reach of the Chesapeake bay (U.S.A.). The effects of stocking densities and environmental variables (depth, temperature) were examined in 1989-1990 on oyster population by using off-bottom culture. No significant density effect was observed on the shell growth, which is described by using a seasonally oscillating function. In contrast, the meat growth and the proximate biochemical composition were bath affected by the stacking density and the depth location. The variability of the resulting effects was observed based on a seasonal trend. Different hypothesis mainly related tO environmental conditions...
Tipo: Text
Palavras-chave: USA; Chesapeake Bay; Oysters; Growth; Biochemical composition; Crassostrea virginica; Croissance; USA; Chesapeake Bay; Huîtres; Biochimie; Biométrie; Crassotrea virginica.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/publication-3076.pdf

Genetic bases and variability of physiological traits involved in growth in Crassostrea gigas - Second Progress Report 1st January-31st December 1997 - Contract n° FAIR 95-421 Commission of the European Communities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerard, Andre; Boudry, Pierre; Bougrier, Serge; Hawkins, A. J. S.; Thiriot Quievreux, Catherine; Wilkins, N. P.; Zouros, Eleftherios; Bonhomme, Francois; Buestel, Dominique; Samain, Jean-francois.
The UE project "GENEPHYS", initiated by the IFREMER laboratory GAP-La Tremblade (Génétique Aquaculture et Pathologie) and CREMA-L'Houmeau (Centre de Recherche en Ecologie marine et Aquaculture), aims to establish the relationships between physiological traits involved in growth (oxygen consumption, absorption efficiency, scope for growth) and their genetic bases (determinism, variability within and among populations) in cupped oyster Crassostrea gigas. The main objectives are : 1. To express the maximum variability of growth, both at the larval stage and at the adult stage, in a oyster population originating from parents of various origins. 2. To check the persistence over the time, of growth performance and related physiological functions. 3. To explain...
Tipo: Text
Palavras-chave: Genetic; Determinism; Variability; Physilogy; Oxygen consumption; Absorption efficiency; Growth; Oysters; Crassostrea gigas.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00050/16150/13633.pdf

Relationship between pre- and post-metamorphic growth in the Pacific oyster Crassostrea gigas (Thunberg)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Collet, Bertrand; Boudry, Pierre; Thebault, Anne; Heurtebise, Serge; Morand, Berenice; Gerard, Andre.
Twenty male and 20 female parental oysters, originating from four sites located along the French Atlantic coast, were crossed together. The 400 crosses were performed separately and then pooled to give a batch of larvae with a large genetic base. Successive sieving after 17 days at 23°C enabled the separation of the largest larvae from the batch. These larvae (i.e., sieving groups) were left to metamorphose and fix onto flat PVC collectors changed daily. Four groups of larvae representing distinctly different growth rates were successively separated during the attachment and metamorphosis of the whole population. This lasted 12 days, from the 17th day to the 29th after fertilisation. A part of each sieving group was settled separately as replicates on...
Tipo: Text
Palavras-chave: Settlement; Metamorphosis; Crassostrea gigas; Growth.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-468.pdf

Minimizing maternal effect in salmonid families mixed since eyed stages and a posteriori DNA-pedigreed
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Haffray, Pierrick; Vandeputte, Marc; Petit, V.; Pincent, Cedric; Chatain, Beatrice; Chapuis, H.; Meriaux, J. C.; Coudurier, B.; Quillet, E.; Dupont-nivet, M.
Application of DNA parentage assignment for commercial selection in aquaculture is still rare. An experiment was performed to quantify and to minimize maternal effects on growth in rainbow trout. Six hundred families were reared until 198 day post fertilization (dpf) according to two different procedures. In the first procedure (NORM), all families were pooled at eyed stage. In the second procedure (MIN), where maternal effects due to differences in egg size were expected to be minimal, the spawns were divided into sub-groups with similar mean egg weight at eyed stage. These sub-groups were then pooled when they achieved the same mean body length (147 dpf). Genetic parameters were estimated for body weight, body length and condition factor at 198 dpf, with...
Tipo: Text
Palavras-chave: Rainbow trout; Fingerprint; Maternal effect; Heritability; Growth; Triploid.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00115/22639/20395.pdf

Integrating the effects of salinity on the physiology of the eastern oyster, Crassostrea virginica, in the northern Gulf of Mexico through a Dynamic Energy Budget model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lavaud, Romain; La Peyre, Megan K.; Casas, Sandra M.; Bacher, Cedric; La Peyre, Jerome F.
We present a Dynamic Energy Budget (DEB) model for the eastern oyster, Crassostrea virginica, which enables the inclusion of salinity as a third environmental variable, on top of the standard foodr and temperature variables. Salinity changes have various effects on the physiology of oysters, potentially altering filtration and respiration rates, and ultimately impacting growth, reproduction and mortality. We tested different hypotheses as to how to include these effects in a DEB model for C. virginica. Specifically, we tested two potential mechanisms to explain changes in oyster shell growth (cm), tissue dry weight (g) and gonad dry weight (g) when salinity moves away from the ideal range: 1) a negative effect on filtration rate and 2) an additional...
Tipo: Text
Palavras-chave: DEB theory; Bioenergetics; Filtration; Maintenance; Growth; Estuary; Louisiana.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00400/51137/53773.pdf

Contribution à l'étude de la crevette rose Palaemon serratus (Pennant) : Exploitation, Biologie, Elevage, Epidémiologie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Campillo, Albert.
This these is the result of several years of investigations conducted on the common prawn Palaemon serratus in the Roscoff (northern Brittany) and Yeu (bay of Biscay) sectors of the French Atlantic coast.    Following a description of the fishery and fishing strategies, it deals with the species biological aspects, focusing on growth, lifespan, sex-ratio and breeding. Hypotheses on the reasons for apparent variations in interannual abundance are drawn up and compared with field observations.   The second part is devoted to production experiments in a controlled environment (hatchery), explaining how larvae are obtained and their development and survival with respect to food, density and physical parameters like salinity and temperature. The link between...
Tipo: Text
Palavras-chave: Shrimp farm; Larval development; Sex ratio; Breeding; Growth; Fishery; Palaemon serratus; Common prawn; Elevage; Développement larvaire; Sex ratio; Reproduction; Croissance; Pêche; Palaemon serratus; Crevette rose.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/these-1196.pdf

Phased oscillations in cell numbers and nitrate in batch cultures of Alexandrium tamarense (Dinophyceae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Collos, Yves; Hadjadji, Imene; Plisson, Benoit; Cecchi, Philippe; Laabir, Mohamed; Bechemin, Christian; Masseret, Estelle.
Alexandrium tamarense (M. Lebour) Balech strains isolated in spring 2007 from a single bloom in Thau lagoon have been grown in nonaxenic artificial media. For three strains showing large oscillations in biomass (crashes followed by recoveries) on a scale of several days, a significant relationship was observed between changes in cell densities (as in vivo fluorescence) and changes in nitrate concentrations. Increases in cell densities were accompanied by decreases in nitrate, while decreases in cell densities corresponded to increases in nitrate, presumably due to nitrification. Net increases in nitrate could reach up to 15 mu mol N . L(-1) . d(-1) indicating a very active nitrifying archaeal/bacterial population. However, following population crashes,...
Tipo: Text
Palavras-chave: Alexandrium tamarense; Archaea; Bacteria; Decay; Growth; Nitrate; Nitrification; Oscillations.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00049/16046/13585.pdf

Effect of dietary protein level on growth and energy utilization by Litopenaeus stylirostris under laboratory conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gauquelin, F; Cuzon, Gerard; Gaxiola, G; Rosas, C; Arena, L; Bureau, D; Cochard, Jean-claude.
A study was conducted using a bioenergetics approach to generate information on energy requirement and feed utilization of Litopenaeus stylirostris. Animals (initial mean weight 21 +/- 1 g were fed ad libitum six experimental diets, ranging from 25 to 58% crude protein (CP), for 50 days.   Weight gain increased from 21 to 30 g with increasing dietary protein level. Survival rates averaged 80%. Basal metabolism (HeE) and heat increment of feeding (HiE) were monitored using respirometry. HeE was on average I U shrimp(-1) day(-1) or 47 U kg live weight(-1) day (22 kJ/kg(0.8). d(-1)), slightly more than what is observed in fish. HiE averaged 0.2 W/sbrimp(-1) day(-1) or 10 W kg live weight(-1) day(-1) (4 kJ/kg(0.8) d(-1)). It represented 3 1 % and 12%...
Tipo: Text
Palavras-chave: Respiration; Excretion; Growth; Dietary protein; L. stylirostris.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-6263.pdf

Déclin de la taille-aux-âges des sardines (Sardina pilchardus) : diminution de la croissance et/ou disparition sélective des individus à croissance rapide
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gentil, Claire.
In many exploited species, we see a decrease of size-at-ages. Two main hypotheses have been proposed to explain this decline: a decline in growth and the selective mortality of the individuals with fast growth both being due to environmental changes or/and to fishing. The sardine Sardina pilchardus of the Bay of Biscay is a good model for the study of this phenomenon because of its high sensitivity to the environmental variations and it sustains two large French and Spanish fisheries. The aim of this study is to measure the changes in the growth of sardines, by the reading of otoliths, and to understand mechanisms involved in this process. The main stages of this study are described in this report: extraction of otoliths during PELGAS, otoliths...
Tipo: Text
Palavras-chave: Sardina pilchardus; Golfe de Gascogne; Otolithes; Croissance; Mortalité; Sélection; Sardina pilchardus; Bay of Biscay; Otoliths; Growth; Mortality; Selection.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00459/57038/58942.pdf

Summer mortality of hatchery-produced Pacific oyster spat (Crassostrea gigas). II. Response to selection for survival and its influence on growth and yield
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Degremont, Lionel; Bedier, Edouard; Boudry, Pierre.
Response to divergent selection for "high" and "low" survival during the summer period, from July to October, was investigated in juvenile (six-month-old) Pacific oysters, Crassostrea gigas, by producing two sets of progenies in 2002 (Generation 2) and three sets of progenies in 2003 (Generation 3). A strict between-family approach was used and resistance of these selected progenies to summer mortality was assessed in three sites along French coasts, to determine their response to selection and estimate realized heritability of the trait. A significant difference in survival was observed between the "high" and "low" selected groups at all sites for all sets of progenies, indicating a significant genetic component. High realized heritabilities for survival...
Tipo: Text
Palavras-chave: Crassostrea gigas; Heritability; Juveniles; Summer mortality; Survival; Growth.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/2009/publication-6950.pdf

Zooplankton production in the Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Greze, V.
An attempt is made to calculate the specific production of major zooplankton groups using a physiological method proposed by Winberg. The present report is based on material obtained from 50 stations in the Aegean and Adriatic Seas; Tunisian Strait and Algerian-Provencal basin. The algorithm of Zharov, used by the author, includes the data biomass, abundance, relation between metabolism at given temperature and organism, dependence of production upon metabolism, and the food utilization coefficient for growth.
Tipo: Text
Palavras-chave: MED; Body weight; Biomass; Growth; Food conversion; Temperature effects; Animal metabolism; Secondary production; Zooplankton.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1513.pdf

Effects of rapeseed meal-glucosinolates on thyroid metabolism and feed utilization in rainbow trout
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Burel, Christine; Boujard, Thierry; Kaushik, Sadasivam; Boeuf, Gilles; Mol, K; Van Der Geyten, S; Darras, V; Kuhn, E; Pradet Balade, B; Querat, B; Quinsac, A; Krouti, M; Ribaillier, D.
Two rapeseed meals (RM1 and RM2), containing glucosinolates at a concentration of 26 and 40 mumol/g, respectively, were incorporated at increasing levels (10, 20, and 30% for RM1 and 30 and 50% for RM2) in diets of juvenile rainbow trout. Disturbances in the thyroid axis appeared after 14 days of feeding (with a dietary incorporation level of 10%). The dietary supplementation with T-3 or iodine induced an increase in plasma T-3 levels, compared to that in fish fed the RM diets, and reduced the deleterious effect of RM on growth. When trout were reared in seawater, there was also a slight increase in thyroid hormone levels. TSH treatment had no effect on the thyroid hormone plasma levels. The incorporation of 30% of RM1, which induced a lower dietary...
Tipo: Text
Palavras-chave: Rainbow trout; Iodine; TSH; Deiodinase activity; Thyroid function; Growth; Glucosinolates; Rapeseed.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-677.pdf

Dinophysis acuminate (dinophyceae), une espèce à géométrie variable sur les côtes françaises
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Marcaillou-le Baut, Claire.
Tipo: Text
Palavras-chave: Morphologie; Variabilité; Ultrastructure; Croissance; France; Dinophysis acuminata; Europe; Milieu marin; Zone côtière; Phytoplancton; Pyrrophycophyta; Algae; Thallophyta; Morphology; Variability; Ultrastructure; Growth; France; Europe; Marine environment; Coastal zone; Phytoplankton; Pyrrophycophyta; Algae; Thallophyta.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00133/24468/22484.pdf

Evolution du phytoplancton dans des bassins de culture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nival, Paul; Malara, G.; Lelong, P.; Cellario, C.; Charra, R.; Riva, A.
The concentration of chlorophyll a in large out-door continuous cul­ture was analysed in spring 1977 and 1978, and autumn - winter 1977-1978. The growth of marine phytoplankton in springsl977 is analysed with more details and shows three phases : - first, the diatoms (especially Skeletonema costatum) grow rapidely (27/4 to 3/5). The growth rate estimated by the chlorophyll measurements is 1.36 day“1. - then (3/5 to.13/5) the concentration of chlorophyll remains more or less constant (23.611.2 mg/m3) as well as the concentration of particulate organic matter. - at the end of the experiment (13/5 to 20/5) the concentration of chlo­rophyll falls as soon as Skeletonema costatum decrease in number.The declin of the phytoplankton biomass is followed by an...
Tipo: Text
Palavras-chave: Phytoplancton; Culture; Croissance; Composition chimique; Espèces; Phytoplankton; Culture; Growth; Chemical composition; Species.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00305/41668/40877.pdf

Estimation of Genetic Parameters of Fatty Acids Composition in Flesh of Market Size Common Carp (Cyprinus carpio L.) and Their Relation to Performance Traits Revealed that Selective Breeding Can Indirectly Affect Flesh Quality
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prchal, Martin; Vandeputte, Marc; Gela, David; Dolezal, Marek; Blichtova, Hana; Rodina, Marek; Flaishans, Martin; Kocour, Martin.
Fish are a rich source of omega-3 polyunsaturated fatty acids (n-3 PUFAs) and thus, they should be an integral part of human diet at least twice a week. As a result, high attention has been devoted to the improvement of fatty acids (FA) content in the flesh of farmed fish through nutrition. Conversely, there are very few data on the potential of selective breeding to improve FA composition in fish. We estimated genetic parameters of fillet fatty acid content and performance traits in market size common carp cultured under semi-intensive pond conditions. The experimental stock arose through factorial mating of 7 dams and 36 sires. All families were reared communally. Pedigree was reconstructed with microsatellite markers, and 158 individuals were dressed...
Tipo: Text
Palavras-chave: Genetic correlations; Genetic improvement; Growth; Heritability; Slaughtering traits; Supplemental feeding.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00449/56043/57558.pdf

Populations, croissance et migration du germon Thunnus alalunga dans le nord-est atlantique. Essai de synthese
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aloncle, Henri; Delaporte, Francis.
As a result of 5 years of sampling the following results were reached: (1) so far as growth was concerned 3 size groups were recognised during June-July. The `classic' type measuring similar to 52-62 cm, a group ranging from 54-55 cm and a 3rd group measuring 64-65cm. By marking the fish and by studying the degree of distribution of the stomach parasite, H.fusca it was noted that the albacore entering the north east Atlantic during summer constitute a heterogenous population migrate along the same route upto the north west boundary of Cape Finisterre. Thereafter they diverge, one group forming a semi-circle along the Bay of Biscay, another moving northwards and on reaching the south of Ireland bends westward.
Tipo: Text
Palavras-chave: North east Atlantic; Growth; Polution dynamique; Migration; Thunnus alalunga.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-2227.pdf

Rapport d'activités 2003 de la station Ifremer de la Tremblade
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Shellfish research laboratory in Pertuis Charentais (France) present the main results concerning its activity during the year 2003. Water quality monitoring, growth, mortality and condition indices are performed on oysters ansd mussels all along the year. Shellfich stock assessment and its spatial distribution, summer mortalities events are the main research topics developped
Tipo: Text
Palavras-chave: Stock; Mortality; Growth; Hydrology; Mussel culture; Stock; Mortalité; Croissance Organisme; Hydrologie; Conchyliculture.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-333.pdf

Growth performances of juvenile sole Solea solea under environmental constraints of embayed nursery areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laffargue, Pascal; Lagardere, Francoise; Rijnsdorp, Adriaan D.; Fillon, Alain; Amara, Rachid.
Les baies du golfe de Gascogne (France) hébergent des habitats où la sole, Solea solea, est le plus abondant des poissons plats. Cette étude vise à évaluer le fonctionnement des habitats pour leur rôle de nourriceries, en analysant la croissance et la condition des juvéniles de sole pendant leur première année. Les données de deux séries, 1999 et 2000, de chalutages mensuels sont comparées à celles acquises lors d'une expérience de 6 mois en mésocosme impliquant l'élevage de poissons originaires de la même nourricerie. La croissance observée est comparée à la croissance potentielle, en utilisant un modèle expérimental décrivant la croissance en fonction de la température. Les soles du groupe d'âge 0 capturées dans la nourricerie atteignent une taille...
Tipo: Text
Palavras-chave: Solea solea; Flatfish; Mesocosm experiment; Condition factor; Growth; 0 group fish; Habitat quality; Coastal nursery.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2928.pdf

Effect of Nitrate, Ammonium and Urea on Growth and Pinnatoxin G Production of Vulcanodinium rugosum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abadie, Eric; Kaci, Lamia; Berteaux, Tom; Hess, Philipp; Sechet, Veronique; Masseret, Estelle; Rolland, Jean-luc; Laabir, Mohamed.
ulcanodinium rugosum, a recently described dinoflagellate species producing a potent neurotoxin (pinnatoxin G), has been identified in French Mediterranean lagoons and was responsible for recurrent episodes of shellfish toxicity detected by mouse bioassay. Until now, the biology and physiology of V. rugosum have not been fully investigated. We studied the growth characteristics and toxicity of a V. rugosum strain (IFR-VRU-01), isolated in the Ingril lagoon in June 2009 (North-Western French Mediterranean Sea). It was cultivated in Enriched Natural Sea Water (ENSW) with organic (urea) and inorganic (ammonium and nitrate) nitrogen, at a temperature of 25 °C and irradiance of 100 μmol/m2·s−1. Results showed that ammonium was assimilated by cells more rapidly...
Tipo: Text
Palavras-chave: Vulcanodinium rugosum; Pinnatoxin G; Ingril lagoon; Growth; Nitrogen source.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00276/38748/37290.pdf

Shrimp aquaculture in New Caledonia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Galinie, C.
In New Caledonia, there is no indigenous shrimp species for commercial aquaculture and it is necessary to control the complete cycle in captivity. Since 1973 and the creation of the Station d'Aquaculture de Saint-Vincent (S.A.S.V.), a joint project between IFREMER, France-Aquaculture and the territory of New Caledonia, nine species have been tested and for one of these, P. stylirostris , (introduced in 1980), we are now in a commercial scale production with the tenth generation obtained in captivity.
Tipo: Text
Palavras-chave: New Caledonia; Penaeus stylirostris; Rearing; Stocking density; Larvae; Growth; Pellet feeds; Intensive culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1496.pdf

Frequency demodulation on otolith numerical images for the automation of fish age estimation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Troadec, Herve.
A method to assist the reading of calcified structures with digital images is proposed. An a priori growth pattern is introduced in the image processing to take into account both the variability of the ring size and the non-linearity of their growth. The introduction of biological knowledge is performed within a demodulation processing using the reciprocal growth function. The ring number is estimated by spectral analysis. The constraints introduced by the growth model are weak since they are restricted to the definition of L0, in the case of an exponential model, or of L∞ in the case of a Von Bertalanffy model. When applied to larval Dover sole otoliths (Solea solea) results close to the expert's are obtained. In the case of saithe otoliths (Pollachius...
Tipo: Text
Palavras-chave: Otolithe; Image numérique; Âge; Croissance; Solea solea / Pollachius virens; Otolith; Digital image; Age; Growth; Solea solea / Pollachius virens.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00189/30072/28560.pdf

A continuous model of biomass size spectra governed by predation and the effects of fishing on them
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benoit, Eric; Rochet, Marie-joelle.
A new time-dependent continuous model of biomass size spectra is developed. In this model, predation is the single process governing the energy flow in the ecosystem, as it causes both growth and mortality. The ratio of predator to prey is assumed to be distributed: predators may feed on a range of prey sizes. Under these assumptions, it is shown that linear size spectra are stationary solutions of the model. Exploited fish communities are simulated by adding fishing mortality to the model: it is found that realistic fishing should affect the curvature and stability of the size spectrum rather than its slope.
Tipo: Text
Palavras-chave: Predation; Mortality; Growth; Biomass size spectrum; Allometry.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-665.pdf

Observations sur la croissance du tourteau Cancer pagurus en Manche et en golfe de Gascogne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Latrouite, Daniel; Morizur, Yvon.
La production française de tourteaux provient pour l'essentiel des captures réalisées en Manche et dans le Golfe de Gascogne ; l'appréhension des caractéristiques de croissance pour cette ressource est une contribution nécessaire à l'aménagement de l'exploitation des pêcheries concernées. Des expériences de marquage-recapture effectuées de 1981 à 1984 sur les populations des deux bassins permettent une approche de la croissance de Cancer pagurus pour les deux zones concernées.
Tipo: Text
Palavras-chave: Molt frequency; Increment; Edible crab; Growth; Aquiculture; Bay of Biscay; Channel; Cancer pagurus; Fréquence de mue; Accroissement; Croissance; Cancer pagurus; Tourteau.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/acte-1417.pdf

Biologie et pêche traditionnelle des crevettes pénéides dans l'embouchure d'un fleuve en milieur semi-aride (sud-ouest de Madagascar)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laroche, Jean; Benoely,; Siaviri, A.
Traditional fishing using beach seines was studied over a period of one year at the mouth of the Onilahy river. The catches/efforts were recorded on a daily basis, biological sampling and the measurement of hydrological parameters being carried out twice a month. The moderate variations of salinity and temperature (14 &lt; salinity &lt; 35; 25 degrees C &lt; temperature &lt; 30 degrees C) which were observed in the estuary can be explained by the semiarid climate of the area. Four species of penaeid shrimps are to be found on the Onilahy: Metapenaeus monoceros, Panaeus indicus, Penaeus monodon and Penaeus japonicus, which were mainly caught at the subadult/adult stage with a Carapace length between 10 and 50 mm. The presence of these important sizes at the...
Tipo: Text
Palavras-chave: Pêche; Estuaire; Dynamique population; Croissance; Taille corporelle; Cycle évolutif; Zone semi aride; Madagascar; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Metapenaeus monoceros; Rivière Onilahy; Afrique; Milieu saumâtre; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata; Fishing; Estuaries; Population dynamics; Growth; Body size; Life history; Semi arid zone; Malagasy Republic; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Africa; Brackish water environment; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00097/20828/42822.pdf

Evidence of underestimation of European hake growth in the Bay of Biscay, and its relationship with bias in the agreed method of age estimation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Pontual, Helene; Groison, Anne-laure; Pineiro, Carmen; Bertignac, Michel.
In 2002, a pilot experiment on hake tagging was carried out using methodology specifically developed to catch and handle fish in,good condition. By the end of 2005, 36 hake and five tags had been returned to the laboratory (a 3.1% return rate) with a maximum time at liberty of 1066 days. The somatic growth of the recoveries proved to be twofold higher than that expected from published von Bertalanffy growth functions for the species in the Bay of Biscay. The growth underestimation was related to age overestimation, as demonstrated by two independent analyses. The first was based on a blind interpretation of marked otoliths conducted independently by two European experts involved in the routine age estimation of hake. The result shows that the age estimates...
Tipo: Text
Palavras-chave: Tagging; Otolith; Merluccius merluccius; Growth; European hake; Age validation; Age estimation method; Age.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2221.pdf

Mineral requirement of Penaeids
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Piedad-pascual, F.
Marine shrimps absorb minerals from their aquatic environment aside from the minerals that come from the food they eat. Thus, the dietary requirement of shrimps for certain minerals will depend on the amounts and availability of these minerals in the aquatic environment. Dietary sources for growth may be necessary due to losses during moltings.
Tipo: Text
Palavras-chave: Penaeus californiensis; Penaeus monodon; Penaeus japonicus; Penaeidae; Malacostraca; Juveniles; Moulting; Feed efficiency; Survival; Growth; Phosphorus; Calcium; Diets; Shrimp culture; Nutritional requirements.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1454.pdf

Combined effects of water quality and stocking density on welfare and growth of rainbow trout (Oncorhynchus mykiss)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Person, Jeannine; Labbe, Laurent; Le Bayon, Nicolas; Severe, Armelle; Le Roux, Annick; Le Delliou, Herve; Quemener, Loic.
An 84-day experiment assessed the combined effects of two fresh water quality levels (H: 1.71 +/- 0.15 mg O(2)l(-1) and 0.28 +/- 0.01 mg l(-1) total ammonia nitrogen (T-AN), L: 5.15 +/- 0.07 mg O2l(-1) and 0.54 +/- 0.01 mg T- AN l(-1)) and 3 stabilized stocking densities: 24.8 +/- 0.2, 74.2 +/- 0.5 and 120.0 +/- 0.9 kg m(-3)) on rainbow trout. Fish were fed using demand feeders with rewards proportional to stocking density. Mass increase was significantly affected by water quality and stocking density, being highest in H water and the lowest at 120 kg m(-3). There was no significant difference in final weight between 25 and 74 kg m(-3), but at 120 kg m(-3) it was 27% and 19% lower in H and L water respectively than at 25 kg m(-3). Feed intake (FI) from day...
Tipo: Text
Palavras-chave: Growth; Welfare; Stocking density; Water quality; Rainbow trout.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4555.pdf

Croissance de jeunes palourdes (Venerupis semidecussata) en nurserie et en mer en fonction des conditions d'élevage
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lucas, Albert.
The japanese palourde Venerupis semidecussata was reared in the Bay of Brest, using hatchery reared spat. Experiments were performed with individuals of lenght 2 to 10 mm raised in a nursery, using raceways with slow running water enriched with unicellular algae, And also with individuals of lenght 8 to 20 mm raised at sea in suspended culture. It was observed that growth depends upon four groups of factors : (1) the functioning and equipment of the raceways, (2) the quantity and quality of the food, (3) the temperature and (4) various physico-chemical factors. When the equipment is satisfactory and when the physico-chemical fac­tors are normal for the species in question, the rate of growth depends essen­tially on the quantity of food, provided that the...
Tipo: Text
Palavras-chave: Palourde; Venerupis; Bivalves; Croissance; Nourriture; Température; Nurserie; Culture suspendue; Aquaculture; Clam; Venerupis; Bivalves; Growth; Food; Temperature; Nursery; Suspended culture; Aquaculture.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00305/41657/40866.pdf

Links between patterns of marine growth and survival of Atlantic salmon Salmo salar, L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peyronnet, Arnaud; Friedland, K; Maoileidigh, N. Ó; Manning, M; Poole, Marine Institute.
The hypothesis that marine survival of Atlantic salmon Salmo Salar is linked to marine growth was explored by using inter-circuli distances and total numbers of circuli existing on scales from a population monitored over nearly four decades. The results suggest that marine growth controls survival, particularly during the late summer and early winter of the first year at sea. Recruitment is strongly linked to growth, described as the total number of circuli, but not to inter-circuli distances. This highlights the potential of patterns of circuli number to be considered as proxies for growth. Indications that hatchery populations might be subject to other mortality events, in addition to those experienced by wild populations, are also presented. (C) 2007...
Tipo: Text
Palavras-chave: Survival; Post smolt; Growth; Circuli; Atlantic salmon.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3230.pdf

Metabolic and digestive activity profiles of newly hatched spotted wolffish (Anarhichas minor Olafsen): effect of temperature
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Savoie, A; Le Francois, N; Cahu, Chantal; Blier, P.
Three groups of newly hatched spotted wolffish (Anarhichas minor) were held at three different temperatures in order to determine relationships between metabolic, digestive and growth response in rapidly developing larvae. Growth rates were successfully modulated by temperature (5, 8 and 12 degrees C). Activity levels of trypsin and lactate dehydrogenase (LDH) were positively linked to specific growth rates at all temperatures. Trypsin showed a positive compensation (higher activity at lower temperature) whereas glycolytic enzymes (pyruvate kinase and Lactate dehydrogenase) and aspartate aminotransferase (AST) showed a negative compensation (lower activity at lower temperature). Citrate synthase was not affected by growth rate, indicating that the level of...
Tipo: Text
Palavras-chave: Anarhichas minor; Temperature; Growth; Energy metabolism; Digestive capacities.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3810.pdf

Le ceteau Dicologoglossa cunetata (Moreau), sa biologie et sa peche dans le sud du golfe de Gasgogne.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Forest, A.
This study deals with D.cuneata, a small soleid listed among the spp of NEAFC Recommendation 2 and exploited by the 'artisanal' trawlers in the South of the Bay of Biscay. The gonads/gutted fish wt ratio has been calculated throughout a yr, and shows that young Dicologoglossa are able to reproduce at age-group II. Spawning takes place during the 3rd quarter. Growth has been determined by otolith reading and length frequency analysis; Bertalanffy's and Gompertz's equations parameters have been studied, and attempts to estimate the instantaneous rate of total mortality have been made. The results are: male Z 3-5=0.74 and 0.83, female Z 3-5=0.96 and 1.35. Selectivity experiments carried out on board of R/V 'La Palagia' give a selection factor of 3.9. The...
Tipo: Text
Palavras-chave: Microchirus; Dicologoglossa cuneata; Population structure; Gear selectivity; Total mortality; Population characteristics; Fishing effort; Artisanal fishing; Reproductive organs; Growth; Fishery statistics.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-2003.pdf

Summer mortality of the Pacific cupped oyster Crassostrea gigas in the Bay of Marennes-Oleron (France). Spatial variability of environmental parameters, growth and production rates using a Geographical Information System (GIS)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soletchnik, Patrick; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Goulletquer, Philippe; Robert, Stephane.
The Marennes-Oleron Bay is the first rearing area in Europe for the cupped oyster, with 35 000 tons proudced on a yearly basis. This species has suffered several chronic summer mortalities for the last 10 years.
Tipo: Text
Palavras-chave: Marennes Oleron Bay; Geogaphical Information System; GIS; Production; Growth; Crassostrea gigas; Oysters; Summer mortality.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/acte-3376.pdf

Les risques conchylicoles en Baie de Quiberon. Troisième partie : le risque d’hypoxie pour l’huître creuse Crassostrea gigas. Rapport final du projet Risco 2010-2013
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stanisiere, Jean-yves; Mazurie, Joseph; Bouget, Jean-francois; Langlade, Aime; Gabellec, Raoul; Retho, Michael; Quinsat, Kevin; Leclerc, Emilie; Cugier, Philippe; Dussauze, Morgan; Menesguen, Alain; Dumas, Franck; Gohin, Francis; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Goubert, Evelyne; Dreano, Alain.
The project “Risco”, supported by the “Pôle Mer” and funded by the Regional Council of Brittany, deals with specific risks of mortality of oysters, Crassostrea gigas, cultivated on the bottom, in a subtidal bay of South Brittany : the bay of Quiberon (56, France). Massive mortalities of oysters were reported in summer 2006 in this bay, exclusively located in the deep muddy area with a positive gradient eastward. A validated biogeochemical model was applied in order to simulate the dissolved oxygen over 2000-2006 : it revealed several episodes of hypoxia, more or less intense according to years, but with the same spatial distribution. This approach proved 2006 to be the most hypoxic year since 2000. The hypoxia was due to a rare conjunction of 3 factors :...
Tipo: Text
Palavras-chave: Baie Quiberon; Crassostrea gigas; Huître; Mortalité; Croissance; Hypoxie; Oxygène; Modèle; Upwelling; Loire; Vilaine; Quiberon; Crassostrea gigas; Oyster; Mortality; Growth; Hypoxia; Oxygen; Model; DEB; Upwelling; Loire; Vilaine.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00180/29131/27535.pdf

Mise en place d'un plan de sélection génétique pour l'ormeau européen Haliotis tuberculata
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lachambre, Sébastien.
In the context of an increasing demand and a declining supply from fisheries, worldwide aquaculture production of abalone has greatly increased in the last decades. Selective breeding has been initiated to improve growth in major abalone species. In France, the abalone production was initiated 30 years ago and struggles to develop. This CIFRE PhD co-financed by France Haliotis, the only French hatchery in activity, was initiated to study early domestication process of farmed abalone population and to provide knowledge required to design a selective breeding program adapted to this company. Wild and farmed populations were compared, showing that, until 2013, farmed and wild abalone presented similar performances. However, lower physiological and behavioural...
Tipo: Text
Palavras-chave: Sélection génétique; Ormeaux; Croissance; Physiologie; Comportement; Selective Breeding; Abalone; Growth; Physiology; Behaviour.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00441/55231/56711.pdf

Growth, fatness and gross biochemical  composition of the japanese oyster Crassostrea gigas in stanway cylinders in the bay of Arcachon, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Rene; Trut, Gilles; Borel, Michel; Maurer, Daniele.
The Stanway cylinder was tested in the bay of Arcachon from September 1989 to August 1991. Trials were mainly performed on the Japanese oyster Crassostrea gigas in a wind-exposed area. The seed, spat, 18 month old oysters development and fattening of 2 year old oysters were studied. Compared to plastic bags the Stanway cylinder has high positive effects on survival and growth of Crassostrea gigas seed. It also has positive effects on commercial sized Crassostrea gigas fattening. Nevertheless, the cylinder has negative effects on the growth of Crassostrea gigas spat and 18 month old oysters, except for width. However, oyster quality is greatly improve : higher condition index, higher carbohydrate contents and higher shell densities were recorded. Because...
Tipo: Text
Palavras-chave: Bay of Arcachon; Culture methods; Growth; Crassostrea gigas; Bassin d'Arcachon; Technique d'élevage; Croissance; Crassostrea gigas.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/rapport-1644.pdf

Age and Growth of the lemon sole (Microstomus kitt) in the Celtic Sea and the North Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig; Elleboode, Romain; Persohn, Cecile; Dufour, Jean-louis.
Age and growth of lemon sole (Microstomus kitt) were determined from 115 specimens collected in the Celtic Sea and in the North Sea in 2006 and 2007. Total length is ranged from 11 to 44 cm, while total weight varied between 12 and 1040 g. Age estimation was based on otoliths readings. The oldest male and female were estimated to be 9 years old. The length–weight relationships parameters for lemon sole in the Celtic Sea and in the North Sea were W=0.0043*TL3.2860 and W=0.0062*TL3.1505 respectively. Weight including both sexes increased with positive allometric growth. The von Bertalanffy growth equation in the North Sea was fitted on the basis of mean length-at-age data resulting in parameters values of TL∞ = 36.44 cm (S.E. = 0.484), K = 0.187 /y (S.E. =...
Tipo: Text
Palavras-chave: Lemon sole; Growth; Von Bertalanffy; Celtic Sea; North Sea.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13024/10002.pdf

Physiological and biochemical indicators of mussel seed quality in relation to temperatures
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tremblay, Rejean; Landry, Thomas; Leblanc, Neil; Pernet, Fabrice; Barkhouse, Carla; Sevigny, Jean-marie.
The bivalve's aquaculture industry is an important component of the economy in Eastern Canada. Seed collection is an initial and critical activity in most bivalve aquaculture industries including mussel farming in Prince Edward Island, production is entirely dependent on natural spat collection. Although seed supply is not a concern from a quantitative standpoint, there are growing concerns about the quality of natural seed. The general objective of this study was to identify and assess mussel seed quality criteria on the basis of physiological and biochemical status under laboratory and field conditions. The performance, as estimated by metabolic measurements, lipid class composition, multi-locus heterozygosity (MLH) and survival to stressful environment...
Tipo: Text
Palavras-chave: Wild seed; Aquaculture; Physiological fitness; Growth; Survival; Multi-locus heterozygosity; Mytilus spp.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00051/16232/13754.pdf

Effets des caractéristiques physico-chimiques et biorhéologiques de l'eau sur la physiologie, les performances adaptatives et la sélection de l'habitat chez la sole commune Solea solea (Linnaeus, 1758)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Couturier, Christine.
Shellfish culture can lead to an accumulation of exopolysaccharides (EPS) over the surface of intertidal mudflats. EPS are rheologically active polymers that change water viscosity and water flow over the branchial basket of the juvenile flatfish that colonise intertidal mudflats. The aim of this study was to assess the impact of water EPS content on various aspects of the physiology and behaviour of the common sole Solea solea. Field studies revealed that water total EPS can be up to 15 mg l 1 in the field. In sole juveniles (aged class 0+) ventilatory distress was observed at concentrations above 4 mg l-1, and the intensity of the constraint decreased with fish size. Nonetheless, neither standard metabolic rate nor tolerance of hypoxia were influenced...
Tipo: Text
Palavras-chave: Flatfish; SDA; Growth; Habitat selection; Metabolism; Hypoxia; EPS; Viscosity; Common sole; Poissons plats; SDA; Croissance; Sélection d'habitat; Métabolisme; Hypoxie; EPS; Viscosité; Sole commune.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-3461.pdf

Dietary TAG source and level affect performance and lipase expression in larval sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morais, Sophia; Cahu, Chantal; Zambonino-infante, Jose-luis; Robin, Jean; Ronnestad, I; Dinis, M; Conceicao, L.
The influence of dietary TAG source (fish oil, triolein, and coconut oil) and level (7.5 and 15% of the diet) on growth, lipase activity, and mRNA level was studied in sea bass larvae, from mouth opening until day 24 and from day 37 to 52. Fish oil and triolein induced better growth in both experiments, this being significant at a higher dietary level. Coconut oil significantly decreased growth at the higher level, possibly as the result of an excessive supply of medium-chain TAG. Growth was not related to lipase specific activity, suggesting a production in excess to dietary needs. Body lipid content was positively related to dietary lipid level and was affected by lipid quality. In addition, larval FA composition generally reflected that of the diet. The...
Tipo: Text
Palavras-chave: Lipase activity; Dietary; Growth; Larvae; Sea bass; Fish culture.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/2004/publication-785.pdf

Estimates of heritability and genotype-environment interactions for body weight in sea bass (Dicentrarchus labrax L.) raised under communal rearing conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Saillant, Eric; Dupont Nivet, Mathilde; Haffray, Pierrick; Chatain, Beatrice.
Genetic parameters for somatic growth rate in sea bass were estimated in two experiments where 27 (year-class 1997) to 30 (year-class 1998) families of sea bass (3 dams mated with 9-10 sires according to a full factorial design) were raised mixed in the same tanks starting shortly before hatching (48 h post fertilization). Trials were performed under two temperature (experiment 1, 1997: group high temperature (HT) and group low temperature (LT)) and two density regimes (experiment 2, 1998: group high density (HD) and group low density (LD)) with a subset of the mating design (18 families) being reproduced in the two experiments. All the fish were genotyped at 3-6 microsatellite loci which allowed them to be assigned to the individual breeders used in the...
Tipo: Text
Palavras-chave: Genotype x environment interaction; Communal rearing; Microsatellites markers; Dicentrarchus labrax; Growth; Heritability.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1706.pdf

Review of grow-out techniques under tropical conditions: Experience of Thailand on seabass (Lates calcarifer ) and grouper (Epinephelus malabaricus)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tookwinas, S.
Seabass and grouper have been reared in cages in coastal waters in Thailand for 10 years. The fingerlings are nursed for a month in nylon nursing cages. Then, the juvenile fish are reared in culture cages which can be stationary or floating. The cage is usually 5 x 5 x 2 metres. The stocking density is around 500 to 2000 fish per cage. The survival rate is approximately 80%. The selling price at the culture site is 80 baht and 250 baht per kg for sea bass and grouper respectively. The culture method and economics of culture are explained.
Tipo: Text
Palavras-chave: Marketing; Diseases; Dissolved oxygen; Stocking density; Physicochemical properties; Water quality; Feeding; Feed; Survival; Juveniles; Nursery ponds; Floating cages; Rearing; Fish culture; Fingerlings; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1423.pdf

Side effects of sexual maturation on heritability estimates in rainbow trout (Oncorhynchus mykiss)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dupont-nivet, Mathilde; Chevassus, Bernard; Mauger, Stephane; Haffray, Pierrick; Vandeputte, Marc.
Tipo: Text
Palavras-chave: Fish; Genetic parameters; Sex effect; Growth.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00016/12690/9656.pdf

Genetic bases and variability of physiological traits involved in growth in Crassostrea gigas - First Progress Report 1st January-31st December 1996 - Contract n° FAIR 95-421 Commission of the European Communities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerard, Andre; Boudry, Pierre; Bougrier, Serge; Hawkins, A. J. S.; Thiriot Quievreux, Catherine; Wilkinns, N. P.; Zouros, Eleftherios; Bonhomme, Francois.
The EEC project "Genephys 1996-2000", initiated by the IFREMER laboratory GAP (Génetique, Aquaculture et Pathologie, La Tremblade and CREMA (Centre de Recherche en Ecologie Marine et Aquaculture, l'Houmeau), aims to establish the relationships between physiological traits involved in growth (oxygen consumption, absorption efficiency, scope for growth) and their genetic bases (determinism, variability within and among populations) in cupped oyster Crassostrea gigas. The main objectives are: 1- To express the maximum variability of growth, both at the larval stage and at the adult stage, in an oyster population originating from parents of various origins. 2- To check the persistence over the time, of growth performance and related physiological functions. 3-...
Tipo: Text
Palavras-chave: Genetic; Determinism; Variability; Physilogy; Oxygen consumption; Absorption efficiency; Growth; Oysters; Crassostrea gigas.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00050/16149/13632.pdf

Development of diets for Penaeus aztecus, Penaeus setiferus, Penaeus vannamei and Penaeus stylirostris juveniles and postlarvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zein-eldin, Z.
Laboratory Studies of penaeid feeding and nutrition were performed at the Galveston laboratory of NMFS between 1963 and 1985. Earliest studies used field-collected Penaeus aztecus postlarval and juvenile stages of both wild and laboratory-spawned P. aztecus and P. setiferus and laboratory-spawned P. vannamei and P. stylirostris were later included.
Tipo: Text
Palavras-chave: Penaeus stylirostris; Malacostraca; Dried products; Fish meal; Growth; Alginates; Spawning; Shrimp culture; Juveniles; Nutrition; Feeding.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1460.pdf

Protein requirements of Penaeid shrimp.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kanazawa, A.
Proteins are indispensable nutrients for growth and maintenance of live of all animals. The optimum protein levels in diets for shrimps are different among the various species. Squid meal is an effective protein source for many penaeids. The effects of dietary protein, lipid, and carbohydrate levels on the growth and survival of larvae of Penaeus japonicus were examined by feeding trials using purified diet with carrageenan as a binder. As a result, the effects of protein levels on growth and survival of P. japonicus larvae varied with dietary carbohydrate levels but not dietary lipid levels.
Tipo: Text
Palavras-chave: Penaeus japonicus; Malacostraca; Marine crustaceans; Amino acids; Larvae; Survival; Carbohydrates; Diets; Nutritional requirements; Proteins; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1485.pdf

The Manila clam population in Arcachon Bay (SW France): Can it be kept sustainable?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dang, Cecile; De Montaudouin, Xavier; Gam, Meriame; Paroissin, Christian; Bru, Noelle; Caill-milly, Nathalie.
The venerid clam Ruditapes philippinarum is the most prominent suspension-feeding bivalve inhabiting muddy intertidal seagrass beds in Arcachon Bay (SW France). It is exploited by fishermen, and Arcachon Bay ranks number one in France in terms of production and total biomass of this species. Previous studies revealed a decrease in the standing stock of R. philippinarum since 2003 and unbalanced length-frequency distributions with a lack of juveniles and of adults &gt;40 mm. Consequently, the population dynamics of this bivalve were studied at four intertidal sites and one oceanic site in Arcachon Bay. As clam size structure did not allow classical dynamics computations. field monitoring was coupled with field experiments (tagging-recapture) over two years....
Tipo: Text
Palavras-chave: Manila Clam; Ruditapes philippinarum; Growth; Mortality; Reproduction; Population Dynamic; Production; Productivity.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11292/7990.pdf

Interet du compteur de particules ZB-ZBI et de l'analyseur C1000 pour la numeration des algues unicellulaires de culture.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Rene.
Marine unicellular algae growth rates were studied with: a Coulter Counter in conjunction with a channelizer, and a hemacytometer. Compared to the hemacytometer a good precision of the culture density was observed when the Coulter Counter was used in conjunction with a channelizer. Nevertheless care had to be taken when determining the growth of the diatoms.
Tipo: Text
Palavras-chave: Laboratory equipment; Growth; Particle counters; Laboratory culture; Algal culture.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/publication-1777.pdf

La densite, un critere de qualite applicable en ecloserie aux embryos de Pecten maximus (mollusque bivalve)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faure, Catherine; Devauchelle, Nicole; Dorange, Germaine.
The quality of the scallop embryos is determined by the spawners characteristics as well as by the external factors they support during the maturation and the spawning phases. All these parameters are not still well controlled during the artificial conditioning in the hatcheries. As a consequence, the quality of the embryos is drastically variable and with them, the larvae performances in terms of survival and growth rates. It would be interesting to get a simple and quick test which would allow the estimation of the spawns quality. The embryos density, evaluated by isopycnic centrifugation of Percoll medium, is well adapted to this objective. Actually, a centrifugation of embryos two hours after fertilization separates them in 3 stratum with their density...
Tipo: Text
Palavras-chave: Pecten maximus; Bivalvia; Quality; Survival; Larvae; Growth; Sexual maturity; Spawning populations; Spawning; Embryos; Hatcheries.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-915.pdf

Evolution et estimation des mortalités estivales de naissain d'huître creuse (Crassostrea gigas) en baie de Quiberon, de mai à septembre 1998.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, Anne-genevieve; Fleury, Pierre-gildas; Tige, Gilbert; Hirata, Toshio; Le Coguic, Marie-jo; Langlade, Aime; Mazurie, Joseph; Ostréiculteurs de la baie de Quiberon.
La question des mortalités estivales de naissains d'huîtres creuses en baie de Quiberon a été abordée selon deux approches complémentaires, l'une plus temporelle, avec le suivi estival régulier de quelques semis, l'autre plus spatiale avec une estimation en plongée des survies en fin d'été d'un plus grand nombre de semis répartis à travers la baie. Le suivi de l'évolution des semis a permis de dater et de quantifier les mortalités estivales sur plusieurs périodes (juin et août essentiellement) ; mais il n'a pas permis d'en identifier les causes. Le rôle des pathogènes, notamment, n'est pas défini. Par ailleurs, l'estimation spatiale des mortalités en fin d'été met en évidence des mortalités nettement différenciées entre les semis (entre 6 et 48%). Parmi...
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea gigas; Naissain; Quiberon; Mortalité; Croissance; Vitalité; Pathologie; Herpès-virus; Pacifie cupped oyster; Crassostrea gigas; Spat; Quiberon (France); Mortality; Growth; Vitality; Pathology; Herpes-virus.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00102/21326/18949.pdf

Approche des relations entre  a croissance de l'huître Crassostrea  gigas et le milieu dans le bassin d'Arcachon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maurer, Daniele.
study of the experimental growth of the oyster Crassostrea gigas was undertaken of 1985 to 1988, parallel to a follow-up hydrobiologic of the medium, in three sites of the basin of Arcachon. - The characteristics of growth of the studied sites proved very stable during various years ; they are also very different from one site to another, the performances being able to vary the simple one with the double of the center of the basin towards the exit on the ocean. It is during the summer and of the autumn that the difference is established between the sectors, the spring growths being similar. The hierarchy observed is associated a more or less great precocity of the laying. - A gradient influences continental oceanic-influence is observed, resulting in more...
Tipo: Text
Palavras-chave: Ostreiculture; Oyster; Hydrobiology; Growth; Bay of Arcachon; Crassostrea gigas; Ostréiculture; Huître; Hydrobiologie; Croissance; Baie d'Arcachon; Crassostrea gigas.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/rapport-1645.pdf

Age, growth and mortality of Sciaena umbra (Sciaenidae) in the Gulf of Tunis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chater, Ines; Romdhani-dhahri, Ahlem; Dufour, Jean-louis; Mahe, Kelig; Chakroun-marzouk, Nadia.
The growth and mortality of the brown meagre, Sciaena umbra from the Gulf of Tunis, were investigated using a sample of 276 specimens, ranging from 15.3 to 49.2 cm total length and from 43 to 1565 g total weight. Specimens were collected from artisanal fisheries between October 2008 and September 2011. Otoliths were extracted, thin cross-sections were realized and radii were measured. The log-linear morphometric relationships between total length-total weight and total length-otolith radius were significant (p &lt; 0.05), showed positive allometry (b=3.15) and isometry (b=0.90), respectively. The marginal analysis suggested that only one growth increment was deposited per year. The maximum age of the brown meagre was 22 years for males and 31 years for...
Tipo: Text
Palavras-chave: Brown meagre; Thin otoliths; Growth; Mortality; Gulf of Tunis; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00424/53552/54415.pdf

Utilisation de critères fonctionnels (présence de spermatophore, maturation des ovaires) pour la détermination de la taille et de l'âge à maturité sexuelle des Nephrops norvegicus femelles de la région sud-Bretagne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morizur, Yvon.
The average length at which female Nephrops norvegicus attain their first maturity was determined during 1977 and 1978 by following the presence of spermatophores and development of the ovaries. During 1978, females were sexually mature at the age of 2 but in 1977 they did not mature before the age of 3. The cumulative maturity curves are sigmoid, due to an overlapping of Gaussian curves. A logistic equation was developed to calculate the percentage of mature females at each length. There is no evidence that the present fishing levels reduce the chances of a female with developing ovaries to be fertilized, since 90 to 100% of such females bear spermatophores.
Tipo: Text
Palavras-chave: Brittany; France; ANE; Crustacea; Nephrops norvegicus; Females; Growth; Sexual maturity.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-2349.pdf

Trade-off between thermal sensitivity, hypoxia tolerance and growth in fish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roze, Thomas; Christen, Felix; Amerand, Aline; Claireaux, Guy.
One outcome of contemporary climate trends is that the involvement of hypoxia and heat tolerance in determining individual fitness will increase in many fish populations. Large fish are believed to be more tolerant to hypoxia than small fish (Nilsson and Ostlund-Nilsson, 2008) whereas thermal sensitivity is thought to decrease with body size (Clark et al., 2008). To better understand the bases of inter-individual variation in environmental adaptation performance, the current study examined hypoxia and heat tolerance in a fast growing (FGS; 288.3 +/- 14.4 g, 26.04 +/- 0.49 cm) and a slow growing (SGS; 119.95 +/- 6.41 g; 20.98 +/- 0.41 cm) strain of 1-year old rainbow trout (Oncorhynchus mykiss). This examination was conducted using two standardized...
Tipo: Text
Palavras-chave: Fish; Hypoxia; Temperature; Trade-off; Growth; Body size.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00130/24104/22371.pdf

REMONOR : Résultats 2004. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mary, Charlotte; Pien, S.
Since 1998, a growth and quality monitoring study of reared molluscs has been developed between the Shellfish Research Laboratory of Normandy (IFREMER Port-en-Bessin, Calvados) and the SMEL (Syndicat Mixte d'Expansion du Littoral) Experimental Centre (Blainville, Manche). REMONOR (REseau MOllusque de NORmandie). This study is based on the experience gained through the national monitoring network REMORA, which protocol has been entirely applied. Adults and spat of Pacific oysters Crassostrea gigas were dispatched on 17 stations all along the four oysters rearing areas of Normandy (Meuvaines-Asnelles, the Baie des Veys, the East and West coasts of the Cotentin peninsula -including Chausey archipelago-). These molluscs had the same origin and history (i.e....
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-2245.pdf

Réseau de surveillance de la croissance et production de l'huître creuse Crassostrea gigas dans le bassin de Marennes-Oléron : bilan de 12 années de suivi (1986-1998)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Moine, Olivier; Geairon, Philippe; Soletchnik, Patrick; Faury, Nicole; Goulletquer, Philippe; Robert, Stephane; Razet, Daniel; Heurtebise, Serge.
Thiis report aims to study the oyster Crwsosrrea gigas growth and production over a 12 years time' s span in the bay of Marennes-DIeron. Results of 12 years of oyster growlh did not show any significant oyster biological productivity decrease, nor trend. ln contrast, annual growth showed a large variability, which will be correlated with environmental conditions. Moreover, annual growth variability was greater than the variability due to site location,. besides the Ronce experimental site. The later, located in the south west part of the bay of Marennes-Dleron, has been the leading oyster growth site since 1989. The annual shell growlh variabiliry was greater than oyster dry meat weight fluctuation . Both 1990 and 1991 years were characterized by the...
Tipo: Text
Palavras-chave: Réseau de surveillance; Croissance; Composition biochimique; Mortalité; Crassostrea gigas; Bassin de Marennes-Oléron; Charente-Maritime; Monitoring network; Growth; Biochemical composition; Mortality rate; Crassostrea gigas; Bay of Marennes Oleron; Charente-Maritime.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00031/14244/11520.pdf

La mytiliculture dans le Pertuis Breton - Rapport provisoire des travaux effectués de 1985 à 1987 par la station RA de l'Houmeau
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dardignac-corbeil, Marie-jose.
La Région Poitou-Charentes fournit près de 20% production mytilicole nationale. Cette participation monte à 30% si l'on y ajoute la partie nord du Pertuis Breton qui , administrativement, relève de la Région Pays de Loire mais dont la majeure partie est en fait exploitée par des charentais. Cependant, les rendements des élevages mytilicoles situés sur la côte atlantique sont médiocres. En effet, la moitié des bouchots fournit à peine plus du tiers de la production nationale. On peut alors se demander si les stocks de moules en culture ne sont pas trop importants, ce qui entraînerait un épuisement des capacités biotiques du milieu avec pour conséquence un ralentissement de la croissance. La réponse à cette question demande que soit connue la relation entre...
Tipo: Text
Palavras-chave: Pertuis Breton; Mytililus edulis; Bouchot; Croissance; Pertuis Breton; Mytilus edulis; Bouchot; Growth.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00045/15582/12986.pdf

Approche de la capacité trophique d'un écosystème conchylicole
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Deslous-paoli, Jean-marc; Prou, Jean.
After a short bibliographical study of the different approaches for determination of the trophic capacity of a bay for molluscs culture, the authors, with a global mode, show the relations between the growth performance of the oysters Crassostrea gigas in relation with the cultivated stocks. The volumes of consumed and assimilated food are calculated for the stocks in relation with the incoming volumes of water in the bay and the residence time for neap tide and spring tide. The authors find a decrease of growth rate in relation with the volume of consumed food. When it is above 60% and when the volume of assimilated food is above 20%, there is a large decrease of the growth of oysters.
Tipo: Text
Palavras-chave: Crassostrea gigas; Oysters; Stock assessment; Models; Food consumption; Growth; Biomass; Stock cultivé; Biomasse; Croissance; Modèle; Crassostrea gigas; Huîtres; Capacité trophique.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/acte-3834.PDF

Feet, heat and scallops: what is the cost of anthropogenic disturbance in bivalve aquaculture?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robson, Anthony A.; Halsey, Lewis G.; Chauvaud, Laurent.
The effects of unnatural disturbances on the behaviour and energetics of animals are an important issue for conservation and commercial animal production. Biologging enables estimation of the energy costs of these disturbances, but not specifically the effect these costs have on growth; a key outcome measure for animal farming enterprises. We looked at how natural and anthropogenically induced activity and energy expenditure of king scallops Pecten maximus varies with temperature. These data were then used to model growth time of king scallops reared in an aquaculture facility under different temperatures and anthropogenic disturbance levels. The scallops exhibited a typical total metabolic rate (MR)-temperature curve, with a peak reached at a middling...
Tipo: Text
Palavras-chave: Growth; Temperature; Anthropogenic disturbance; Activity; Metabolic rate; Energy expenditure.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00344/45561/72893.pdf

Effect of xanthan on the growth of sulphate-reduction bacteria in marine sediments.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Battersby, N; Stewart, D; Sharma, A.
Chemical additives are used extensively in the offshore oil industry. For secondary oil recovery, the biopolymer xanthan has been recommended as a viscosifying agent but its use may provoke microbial problems. The effect of adding xanthan to marine sediments on the growth and metabolic activity of sulphate-reducing bacteria (SRB) was studied. In all instances, its addition resulted in an increasing in SRB numbers of up to 250-fold. This was accompanied by a marked increase in the electron transport activity of the sediments when these were incubated under either aerobic or anaerobic conditions. The products formed as a result of the biodegradation of the polymer by indigenous heterotrophic bacteria in these sediments appear to have acted as suitable...
Tipo: Text
Palavras-chave: Bacteria; Growth; Additives; Pollution effects; Oil recovery; Biodegradation; Polymers; Sediment pollution; Sulfate reduction.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1015.pdf

Apport d'un programme de génétique à une filière de production aquacole : l'exemple de l'ostréiculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lapegue, Sylvie; Bedier, Edouard; Goyard, Emmanuel; Degremont, Lionel; Baud, Jean-pierre; Gerard, Andre; Goulletquer, Philippe; Boudry, Pierre.
Two oyster species are currently present along the French coasts : the indigenous European flat oyster (Ostrea edulis), and the Pacific cupped oyster (Crassostrea gigas), that has been introduced from Japan since the beginning of the 70ies. The flat oyster successively suffered from two protozoan diseases during the 60ies and its production decreased from 20 000 tons/year by that time to 1 500 tons/year nowadays. Consequently, the oyster production is principally (99%) based upon the Pacific oyster species with approximately 150 000 tons/year among which 90% are grown from the natural spat. However, the hatchery production of this species is developing and was estimated to 400 to 800 millions spat in 2002. Moreover, strengthened relationships between...
Tipo: Text
Palavras-chave: Growth; Selection; Genetic breeding; Genetic; Ostrea edulis; Crassostrea gigas; Oysters; Croissance; Sélection; Amélioration génétique; Génétique; Ostrea edulis; Crassostrea gigas; Huîtres.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2003/acte-3491.pdf

REMONOR. Résultats 2007. Evaluation de la mortalité, croissance et qualité des huîtres
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ropert, Michel; Pien, S; Mary, Charlotte; Bouchaud, B.
Each year, the regional network REMONOR assesses the mortality, growth and quality of cupped oysters in two age classes ("adults", 2 years old; "juveniles", 1 year old) at various stations in the main oyster farming areas in Normandy. We used the protocol established by the national network REMORA. REMONOR is implemented by the Normandy Environment Resources Laboratory (LERN) in conjunction with the Joint Association for Coastal Fisheries (SMEL). This year, a new station at Fermanville (NC01), in the north of the Manche "département», was integrated into the network. This is the first deep-water station of the regional network....
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-4325.pdf

Contribution a l'étude de l'étrille Necora puber dans le Mor-Braz : données halieutiques, biologiques et pathologiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wilhelm, Gwenaëlle.
The velvet swimming crab Necora puber, commonly found on the French coast was an important resource for inshore fishermen of the Mor-Braz sea in Southern Brittany before the production collapsed in 1985. Although there are still many uncertainties as to the reasons for this, we note that the collapse took place after a significant ecological imbalance which locally caused massive mortality of many marine organisms in 1982.  Without being obviously linked to the former point, mortality due to pathological causes was observed in velvet swimming crabs. Seeing the lack of general knowledge about these crabs, this study was designed to acquire data about its fishery and its biology. The first part focused on fleet, fishing effort and yield trends in the...
Tipo: Text
Palavras-chave: Parasitic dinoflagellate; Hematodinium; Northern Biscay; South Brittany; Pathology; Reproduction; Growth; Fishing; Necora puber; Velvet swimming crab; Dinoflagellé parasite; Hematodinium; Nord Gascogne; Bretagne sud; Pathologie; Reproduction; Croissance; Pêche; Necora puber; Etrille.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/these-1197.pdf

Capacité trophique du bassin de Marennes-Oléron : couplage d'un modèle de transport particulaire et d'un modèle de croissance de l'huître Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric.
The trophic relationship between a population of cultivated oysters and potential food was modeled in Marennes-Oleron Bay. Coupling the transport process of particulate matter with assimilation by a population of oysters was achieved through a box mode!. Transport between boxes was based on a mass conservation equation. Parameters were derived from volumes of the boxes, tidal movements and residual 110ws between boxes, and were computed from a numerical hydrodynamical model. Consumption, assimilation and respiration terms were put into an energetic budget equation which enabled simulation of growth. A result of the model was the variability of growth along an axis from North to South, which was related to the oysters' accumulated consumption of food....
Tipo: Text
Palavras-chave: Marennes Oleron Bay; Growth; Energetic budget; Crassostrea gigas; Trophic capacity; Box model; Marennes Oléron; Croissance; Bilan énergétique; Crassostrea gigas; Capacité trophique; Modèle en boîtes.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/publication-2882.pdf

Impact of temperature on larval development and evolution of physiological indices in Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ben Kheder, Rym; Moal, Jeanne; Robert, Rene.
The effect of four temperatures, ranging between 17 degrees C and 32 degrees C, was studied on development and lipid reserve management of Crassostrea gigas larvae. No effect of temperature was found on larval mortality, as high survival (&gt;90%) was recorded before competence at all temperatures studied. Temperature did, nonetheless, have a strong effect on growth and settlement success. At low temperature (17 degrees C), larvae competent to metamorphose were only observed from day 23 and only a low percentage finally achieved metamorphosis (12%). The opposite was seen at temperatures &gt;= 27 degrees C: larval competence appeared at day 18 and led to high rates of metamorphosis (60-90%). This difference at settlement seemed to be linked to larval...
Tipo: Text
Palavras-chave: Crassostrea gigas; Larvae; Growth; Metamorphosis; Temperature; Lipids; Physiological indices.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13046/10146.pdf

Performances d'élevage de la moule (Mytilus edulis) en Manche/Atlantique. Recensement et interprétation. 1 : Synthèse et rapport
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodriguez, Julien.
The objective of this study is to explain the decrease in mussel production, along the French coasts of Atlantic and the English Channel, through existing data and additional inquiries. This decrease in 2010 and 2011 had two components : a growth deficit and losses of mussels, due to detachment and mortality. Both inter-annual and geographic differences in rearing yields seem to be linked to phytoplankton abundance and turbidity. In 2011, severe droughts have impacted the level of rivers effluents to marine, limiting nutrients inputs. In 2010, frequent winds from east seem to have maintained the phytoplankton blooms away from the coasts. Detachment and mortalities of mussels might be due to physiological stress or weakening linked to poor environmental...
Tipo: Text
Palavras-chave: Mytiliculture; Bouchots; Moule; Mytilus edulis; Performances d’élevage; Bassins conchylicoles; Croissance; Décrochage; Mortalité; Byssus; Prédation; Réseaux; Sécheresse; Régimes de vents; Mussel farming; Bouchot; Mytilus edulis; Growth; Mortality; Byssus; Detachment; Meteorological conditions.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00142/25341/23422.pdf

La pêcherie du tourteau Cancer pagurus sur les cotes de Bretagne Sud : déplacements, croissance, reproduction
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Foll, Anne.
Targeted fishing of the edible crab Cancer pagurus has progressively replaced that of overfished lobster and spiny lobster stocks.  Over the past few years it has become a significant activity for small-scale fishing vessels from various harbours on the Channel and the Atlantic French coast. Official figures show that national landings amounted to 10,000 tonnes in 1980. In spite of this fishery being recent, drops in yield in some areas have brought about changes in the way it is exploited, with more distant fishing grounds and redeployments.  This doctoral thesis study was conducted in relation with the Scientific and Technical Institute of Maritime Fisheries (ISTPM), contributing to the implementation of a rational edible crab management policy....
Tipo: Text
Palavras-chave: Reproduction; Growth; Migration; South Brittany; Northern Biscay; Fishery; Cancer pagurus; Edible crab; Reproduction; Croissance; Migration; Bretagne sud; Nord Gascogne; Pêche; Cancer pagurus; Crabe tourteau.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/these-1204.pdf

Exploitation, éléments de croissance et de dynamique du stock de coquilles Saint-Jacques (Pecten maximus, L.) des Pertuis Charentais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchard, Fabian.
Tipo: Text
Palavras-chave: Bay of Biscay; Pecten maximus; Growth; Exploitation; Stock assesment.
Ano: 1995
URL: https://archimer.ifremer.fr/doc/1995/rapport-523.pdf

Croissance et qualité de l'huître ceuse Crassostrea gigas dans le bassin de Thau (Hérault) : Résultats d'une étude réalisée en 1990-1991
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pichot, Paul; Landrein, Sonia; Juge, Claude.
During years 1990-1991, a study was carried ouI in order to precise the relationship between sorne physiological features and the biochemical characteristics of dry flesh and hemolymf of oyster Crassostrea gigas, cultivated in the mediterranean lagoon of Thau. Growth rates and biochemical analysis for proteins, lipids and carbohydrates were estimated. The results of this study are given. They include many other data from a study on trophic relationships developed between 1985-1989.
Tipo: Text
Palavras-chave: Méditerranée; Etang de Thau; Crassostrea gigas; Croissance; Composition biochimique; Protides; Lipides; Glucides; Mediterranean; Lagoon of Thau; Crassostrea gigas; Growth; Biochemical composition; Proteins; Lipids; Carbohydrates.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00419/53031/53966.pdf

Growth and metal uptake of microalgae produced using salt groundwaters from the Bay of Bourgneuf
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gagneux Moreaux, Sindy; Cosson, Richard P.; Bustamante, Paco; Moreau, Christophe.
The Bay of Bourgneuf, France, is a main site of shellfish production. In the marshes along the bay, oyster intensive rearing and fattening need the mass production of microalgae. Salt groundwaters, available in this region, support a large part of this production for aquaculture. Studies carried out by local authorities have brought to the fore the accumulation of lead (Pb) in several samples of algal pastes derived from cultures using salt groundwater. The aim of this study was to compare growth, nutritional value and metal (Cd, Cu, Pb and Zn) uptake of four microalgae grown in two salt groundwaters or in enriched coastal seawater. Cultures of microalgae used in aquaculture (Haslea ostrearia, Phaeodactylum tricornutum, Skeletonema costatum and Tetraselmis...
Tipo: Text
Palavras-chave: Marine microalgae cultivation; Aquaculture; Metals; Growth; Prasinophycea; Bacillariophycea; Diatom; Bioaccumulation; Trace elements; Saline groundwater.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2135.pdf

Les Sars Deplodus sargus (Linne 1758) du Golfe du Lion: croissance et caracteristiques des debarquements aux criees de Sete et du Grau-du-Roi.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Man-wai, Rabenevanana; Quignard, Jean-pierre.
Age and growth of seabream D. sargus in the Gulf of Lions (Mediterranean Sea) were examined using scale reading. Growth was expressed by the von Bertalanffy's equation based on the estimation of total lengths at the time of annual ring formation. The growth in weight and the length-weight relationship were calculated for both sexes separately and combined during and after spawning periods. Preliminary investigations on the characteristics of commercial catches (from Sete and Grau-du-Roi commercial fishing grounds) were also carried out.
Tipo: Text
Palavras-chave: Diplodus sargus; Sparidae; Pisces; Fishing grounds; Spawning; Fishery biology; Age determination; Fish catch statistics; Length weight relationships; Scale reading; Growth.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1845.pdf

Assessing chronic fish health: An application to a case of an acute exposure to chemically treated crude oil
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mauduit, Florian; Domenici, P.; Farrell, A. P.; Lacroix, C.; Le Floch, S.; Lemaire, P.; Nicolas-kopec, A.; Whittington, M.; Zambonino-infante, Jose-luis; Claireaux, Guy.
Human alteration of marine ecosystems is substantial and growing. Yet, no adequate methodology exists that provides reliable predictions of how environmental degradation will affect these ecosystems at a relevant level of biological organization. The primary objective of this study was to develop a methodology to evaluate a fish’s capacity to face a well-established environmental challenge, an exposure to chemically dispersed oil, and characterize the long-term consequences. Therefore, we applied high-throughput, non-lethal challenge tests to assess hypoxia tolerance, temperature susceptibility and maximal swimming speed as proxies for a fish’s functional integrity. These whole animal challenge tests were implemented before (1 month) and after (1 month)...
Tipo: Text
Palavras-chave: Fish; Oil spill; Dispersant; Biomarkers; Physiological integrity; Ecological performance; Temperature; Hypoxia; Swimming; Growth.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00347/45828/45916.pdf

Factors affecting bacterial biomass and growth in the Duplin River estuary and coastal Atlantic Ocean.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fallon, R; Newell, S; Sherr, B; Sheer, E.
Bacterial numbers and growth rates were measured in coastal, planktonic systems of the Western Atlantic ocean. Seasonal responses in growth rates of the bacterial assemblage were present at some sites, but these may be related to seasonal changes in substrate supply rather than to changes in temperature. Bacterial growth rates tended to decline with increasing distance from shore. There was evidence for predator-prey population cycles in the bacteria and &lt; 17 mu m protozoa in the Duplin River Estuary which may indicate that the bacterial assemblage serves as prey for protozoan populations. In summer, a significant negative correlation between mu (instantaneous growth rate) and cell numbers in the bacterial assemblage indicated that substrate limitation...
Tipo: Text
Palavras-chave: Protozoa; Plankton; Bacteria; Predators; Grazing; Temperature effects; Seasonal variations; Limiting factors; Interspecific relationships; Nutrients (mineral); Growth.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-955.pdf

Réseau de suivi de la croissance de l'huître creuse en Bretagne. Synthèse des quatre années 1989 à 1992
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Littaye-mariette, Anne; Mazurie, Joseph.
Since 1989, an homogeneous Crassostrea gigas oyster stock has been distributed once a year on several rearing sites in Brittany (3 populations per site). The main quantitative and qualitative growth descriptors, which reflect water quality effects during the monitoring period, are estimated at the end of each year. The 1989-1992 analysis prompted us to describe various growth responses correlated to biotops: oyster production in open areas influenced by oceanic waters was fairly constant in quality, including size and Polydora sp. infestation. In contrast, oysters in estuarine areas, partly affected by eutrophication (e.g., Aber Benoît, Pen Bé), or with a low carrying capacity, were characterized by weight and Polydora sp. infestation heterogeneity. These...
Tipo: Text
Palavras-chave: Polydora; Condition Index; Mortality; Growth; Monitoring; Oyster; Crassostrea gigas; Brittany; Polydora; Indice de condition; Mortalité; Croissance; Réseau; Huître; Crassostrea gigas; Bretagne.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-1639.pdf

RESCO - Réseau d'observations Conchylicoles : Campagne 2013
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Elodie.
The French network RESCO was developed in 2009, following the widespread mortalities in French oysters stocks of Crassostrea gigas that killed a majority of young cultivated oysters in summer 2008. The main objective of this network was to develop a tool of estimation of the mortalities at national scale, through a standardized monitoring of sentinel oysters In 2013, similar batches of spat and 18 month old oysters from different origins were deployed in thirteen sites located all along the French coasts to measure the spatial and temporal evolution of the mortality and growth rates. At the same time, the program provides a high-frequency recording of environmental parameters and the detection of the main infectious agents associated to the oyster...
Tipo: Text
Palavras-chave: Crassostrea gigas; Huître creuse; Mortalité; Croissance; Température; Enregistrement haute fréquence; Herpes virus; Vibrio aesturianus; Agent pathogène; Crassostrea gigas; Pacific oyster; Mortality; Growth; Temperature; High frequency data acquisition; Herpes virus; Vibrio aestuarianus; Infectious agent.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00197/30851/29212.pdf

Effects of hypoxia on growth and metabolism of juvenile turbot
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pichavant, Karine; Person, Jeannine.
The effects of hypoxia on growth, feed efficiency, nitrogen excretion, oxygen consumption and metabolism of juvenile turbot (120 g) were studied in a 45-day experiment carried out in sea water at 17.0 +/- 0.5 degrees C and 34.5 ppt salinity. Fish were fed to satiation at O-2-concentrations of 3.5 +/- 0.3, 5.0 +/- 0.3 mg l(-1) (hypoxia) and 7.2 +/- 0.3 mg l(-1) (normoxia). Both feed intake (FI) and growth were significantly lower under hypoxia than under normoxia, with no significant differences being observed between 3.5 and 5.0 mg O-2 l(-1). During the first 2 weeks of the experiment, FI was halved under hypoxic conditions, and there were large differences among treatments in feed conversion ratio (FCR), i.e., it was 3.2, 1.5, and 0.9 in turbot exposed to...
Tipo: Text
Palavras-chave: Acid base status; Ion regulation; Nitrogen excretion; Oxygen consumption; Feed utilization; Growth; Hypoxia; Turbot.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-631.pdf

Caractérisation de l’adaptation comportementale des téléostéens en élevage : plasticité et effets de la domestication
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benhaim, David.
The farming of aquatic animals has started recently in comparison with that of terrestrial species which domestication started 10 500 years ago. Aquaculture is however the fastest growing animal food-production sector. This sector has now to face several challenges threatening its sustainability. Indeed, aquaculture future largely depends upon the reduction of the reliance on feeds based ingredients derived from wild fishery resources, upon a better knowledge of fish domestication process and of the adaptation mechanisms and related welfare potential. The present work aims at a better understanding of the adaptation to farming conditions through a behavioural approach based on the comparison between wild vs. domesticated populations of three species: a...
Tipo: Text
Palavras-chave: Adaptation; Plasticité; Domestication; Bien-être; Comportement alimentaire; Activité de nage; Personnalité; Aliment végétal; Labyrinthe; Statut physiologique; Croissance; Aquaculture; Repeuplement; Adaptation; Plasticity; Learning; Domestication; Welfare; Feeding behaviour; Swimming activity; Personality; Plant-based diet; Maze; Physiological status; Growth; Aquaculture; Restocking.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00078/18926/16515.pdf

Ecologie larvaire de l'huître perlière (Pinctada margaritifera, L.), croissance et dispersion dans un lagon d'atoll polynésien
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thomas, Yoann.
Understanding key factors determining the bentho-pelagic species larval growth and dispersal remains one of the challenges of marine ecology, notably to understand the adult population structure and dynamics. In the present study, we explore this determinism on the development and dispersal of the black-lip pearl oyster (Pinctada margaritifera var. cumingii, Linné 1758) larvae in a French Polynesian atoll lagoon (Ahe, Tuamotu archipelago). Rearing of the pearl oyster for the production of black pearls takes on a major social and economic place in French Polynesia. However, the supply of pearl oyster seed to the farms depends entirely on the natural collection of wild spat of the only one specie P. margaritifera, and spatial and temporal variability of spat...
Tipo: Text
Palavras-chave: Ecologie larvaire; Hétérogénéité environnementale; Modélisation; Croissance; Dispersion; Huître perlière à lèvres noires; Pinctada margaritifera; Lagon d’atoll; Polynésie française; Larval ecology; Environmental heterogeneity; Modeling; Growth; Dispersal; Black-lip pearl oyster; Pinctada margaritifera; Atoll lagoon; French Polynesia.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00003/11449/7999.pdf

REMORA. Résultats nationaux année 1994
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goyard, Emmanuel.
What is REMORA? REMORA &amp;#8722;REseau MOllusques du département Ressources Aquacoles&amp;#8722; (Aquaculture Resources Department Mollusc Network) is a surveillance network dedicated to the growth of hollow oysters Crassostrea gigas. In the past and in most production areas, observations were made on a regular basis. In 1993, homogenising experimental protocols between the different laboratories involved was decided, as well as using a common initial oyster batch, therefore organizing a network covering all of the French coasts. This network aims at providing, each year, the production's basic characteristics found in main oyster beds (growth reference). It also better characterizes variations and shows potential tendencies.
Tipo: Text
Palavras-chave: Mortality; France; Network of monitoring; Crassostrea gigas; Growth; Oyster culture.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/rapport-1755.pdf

Amylase polymorphism affects growth in the cupped oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huvet, Arnaud; Samain, Jean-francois; Boudry, Pierre; Bedier, Edouard; Ropert, Michel; Van Wormhoudt, A.
The better understanding of physiological and environmental factors that determine optimal food conversion efficiencies is of major interest for the cupped oyster Crassostrea gigas for which the strong increase of aquaculture has been correlated in France with a decrease in productivity due to competition between aquatic species for limited food supplies at grow-out sites. To investigate the non-neutrality of the polymorphism of amylase, a key enzyme for carbohydrate assimilation, in oyster physiology, we report in the present paper the growth and survival measurement of amylase genotypes within five bi-parental C. gigas families, bred to be polymorph at the two PCR-RFLP amylase markers, and reared over one year under standard culture conditions in two...
Tipo: Text
Palavras-chave: Amylase markers; Growth; Amylase Polymorphism; Genetic; Oysters; Crassostrea gigas.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3311.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; résultats des stations NATIONALES ; Année 2004
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Simonne, Charlotte; Claude, Serge; Palvadeau, Hubert; Guilpain, Patrice; D'Amico, Florence; Le Gall, Patrik; Vercelli, Catherine; Pien, C.
The network REMORA by IFREMER quarterly follows each year 2 batches of Pacific cupped oysters Crassostrea gigas ("juveniles"= 1 year old; and "adults" = 2 years old) on various sites among the main French oyster areas. The network monitored 46 sites in 2004, including the 7 new sites added in 2003. The network REMORA thus assess seasonal survival, growth and quality of cupped oysters. It is a tool for trend estimations, ecosystem management and a reference frame for scientific studies. Globally speaking, the year 2004 was a good year for oyster farming, with a low mortality and a fast growth. The rearing yield (survival x growth) reached 2.0 for adults instead of 1.8 usually. However, the meat index remained close to the average inter annual data....
Tipo: Text
Palavras-chave: Polydora; Quality; Growth; Mortality; Crassostrea gigas; Pacific Cupped oyster; France; REMORA; Polydora; Qualité; Croissance; Mortalité; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-2413.pdf

Caractérisation de marqueurs génétiques fonctionnels de la nutrition et/ou de l'adaptation (les amylases) chez l'huître creuse Crassostrea gigas : intérêts pour la sélection
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prudence, Marie.
Two amylase genes, A and B, from the oyster Crassostrea gigas were characterized. Using PCR-RFLP, 6 and 4 alleles, respectively, were described for the amylase genes A and B. The roles of A and B amylase genes were investigated experimentally. They are expressed during larval and adult stages, and A transcripts are more abundant than B. The A transcript increases significantly with temperature, in high trophic conditions. However, A and B transcript levels do not change when food quantity increases although amylase activity augments. The level of B is correlated with dietary starch quantities, whereas the amount of A appears to remain constant ; simultaneously amylase activity decreases and the KM increases. These results suggest that expression of B is...
Tipo: Text
Palavras-chave: Enzymatic analyse; Genetic polymorphism; Genes; Nutrition; Growth; Environmental effects; Oysters; Amylases; Amylases; Analyse enzymatique; Polymorphisme génétique; Gènes; Nutrition; Croissance; Effets de l'environnement; Huîtres; Amylases; Amylases.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-1700.pdf

Déterminisme de la croissance de l'huître creuse, Crassostrea gigas, en Bretagne : Méthodologie d'élaboration d'un modèle global.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dormoy, Jean-marc.
Based on a four years survey of Pacific Oyster Crassostrea gigas growth in the main shellfish farming areas of Brittany from 1989 to 1992, this report is a first attempt to explain the differences between sites and years. The determinist growth models do not suit to this objective, for methodological and practical reasons. Nevertheless, they provide the conceptual basis of a global model by identifying the reliable environmental parameters for a statistical explanation of growth results. The present study proposes a methodology for a global statistical model using the main stages of the ecological and biological processes of shellfish growth. These propositions are based on the analysis of the determinist model's constraints, and also on the identification...
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea gigas; Croissance; Environnement; Modèle I(lobal; REMORA; Cupped oyster; Crassostrea Gigas; Growth; Environment; Global model; REMORA.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00122/23346/21172.pdf

Variations des activites digestives en fonction des facteurs du milieu chez les crustaces
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Galgani, Francois; Benyamin, Y; Vanworhmoudt, A; Cecaldi, J.
Proteolytic enzymes of hepatopancreas of six species of peneids (Penaeus kerathurus, P. japonicus, P. monodon, P. stylirostris, P. merguiensis and P. vannamei ) have been studied. Some of their physiological variations have been characterised. Increase in acclimation temperature of crustaceans enhances increase of specific activities of proteases. Variations of salinity does not modify specific activities, nor quantities of trypsin, nor electrophoretic patterns of these different proteases.
Tipo: Text
Palavras-chave: Penaeus kerathurus; Penaeidae; Malacostraca; Diets; Growth; Larval development; Life cycle; Acclimation; Environmental effects; Digestive glands; Enzymatic activity; Salinity effects; Temperature effects; Enzymes; Endocrinology; Digestion; Développement larvaire; Croissance; Cycle d'intermue; Carboxypeptidase A and B; Leucine aminopeptidase; Chymotrypsin; Trypsine; Enzymes digestives; Homarus ganmarus; Palaemon serratus; P. vannamei; P. merguiensis; P. stylirostris; P. monodon; P. japonicus; Penaeus keratkurus.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1195.pdf

Le réseau REMORA de suivi de la croissance des huîtres creuses Crassostrea gigas ; analyse des premières tendances (1993-98) en Bretagne.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Goyard, Emmanuel; Mazurie, Joseph; Claude, Serge; Bouget, Jean-francois; Langlade, Aime; Le Coguic, Marie-jo.
The network IFREMER/REMORA has watched every year, since 1993, from February to December, mortality, growth and quality criteria of two oyster class-size ("juveniles" of the first-year c1ass and "adults" of the second year c1ass), distributed among various stations of the French oyster areas. This has provided a quite standard and simple annual assessment of the rearing results, generally tallied with professional observations. From year to year, data series have been obtained, from which mean values (references), chronological trends or spatial differences can be analysed. Results in Brittany, from 1993 to 1998, show that, in a "normal" year, 30 g oysters grow to 60-80 g at the end of the year, with a mortality rate of 10-15%. Mortality occures mainly in...
Tipo: Text
Palavras-chave: REMORA; Bretagne; Huître creuse; Crassostrea gigas; Mortalité; Croissance; Qualité; Polydora; REMORA; Brittany (France); Gigas oyster; Crassostrea gigas; Mortality; Growth; Quality; Polydora.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00113/22386/20081.pdf

Effect of fish meal replacement by plant protein sources on non-specific defence mechanisms and oxidative stress in gilthead sea bream (Sparus aurata)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sitja Bobadilla, A; Pena Llopis, S; Gomez Requeni, P; Medale, Francoise; Kaushik, Sadasivam; Perez Sanchez, J.
Partial or total replacement of fish meal by a mixture of plant protein (PP) sources (corn gluten, wheat gluten, extruded peas, rapeseed meal and sweet white lupin) balanced with indispensable amino acids was examined in juvenile gilthead sea bream over the course of a 6-month growth trial. A diet with fish meal (FM) as the sole protein source was compared to diets with 50%, 75% and 100% of replacement (PP50, PP75, and PP100). The possible influence of diets on growth performance, plasma metabolites, gut integrity, liver structure, anti-oxidant and immune status was evaluated. Final body weight was progressively decreased with PP inclusion, but in PP50 and PP75-fed fish, feed efficiency (FE) was significantly improved and specific growth rates remained...
Tipo: Text
Palavras-chave: Gilthead sea bream; Cholesterol; Glutathione; Histopathology; Myeloperoxidase; Complement; Lysozyme; Respiratory burst; Immune response; Growth; Plant proteins; Fish meal.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-3595.pdf

Utility of mixed effects models to inform the stock structure of whiting in the Northeast Atlantic Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barrios, Alexander; Ernande, Bruno; Mahe, Kelig; Trenkel, Verena; Rochet, Marie-joelle.
Stock structure of whiting (Merlangius merlangus) in the North East Atlantic is unclear. This study uses mixed effects models to analyse growth variability as a way to investigate stock identification. Growth trajectories for 634 individuals and length-at-age data for 78,686 individuals were analysed for spatial coherence and temporal synchrony in the parameters of the von Bertalanffy growth model. Growth was found to differ among most ICES divisions, and temporal fluctuations were poorly synchronized between areas. This study illustrates how growth analyses can contribute to stock identification, in addition to other data.
Tipo: Text
Palavras-chave: Growth; Whiting; North East Atlantic; Otolith; Von Bertalanffy growth model; Mixed effects models.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00373/48415/48810.pdf

Influence de la densite et de l'age des huitres japonaises (Crassostrea gigas ) sur la croissance et la composition biochimique en bassins de terre
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodoy, A; Geiaron, P; Garnier, Jacqueline; Heurtebise, S.
Two different biomasses (100 g multiplied by m super(-2) and 1 kg multiplied by m super(-2)) of oysters were put in identical sea-water ponds, thus leading to different trophic conditions, corresponding to rearing techniques. Changes in growth, biochemical composition and sexual maturation were recorded for two age groups. The first one included 9 month-old oysters and the second one 21 month-old oysters, at the beginning of the experiment. For both age groups, significant differences were observed in growth and biochemical composition. Lipids were accumulated faster for the lower biomass. However, the only difference concerning glycogen was observed on the older oysters. They showed a peak at the lowest biomass and a decrease at the larger biomass. Sexual...
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalvia; Sea water; Oyster culture; Glycogen; Age; Chemical composition; Lipids; Biochemistry; Sexual maturity; Rearing; Pond culture; Biomass; Growth; Density.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-916.pdf

Grow-out mariculture techniques in tropical waters: A case study of problems and solutions in Hong Kong.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wu, R; Lee, J.
Raft culture is practised and trash fish is being used as feed in Hong Kong. Culture space is limited and most of the culture sites are over-crowded. Food conversion ratio is poor (about 10-15), grow-out mortality is high (30-50%) and fish kills caused by oxygen depletions, algal blooms and red tides occur frequently. Disease and water pollution are also problems.
Tipo: Text
Palavras-chave: Sparidae; Pisces; Indicator species; Diseases; Water pollution; Cage culture; Artificial feeding; Food fish; Oxygen depletion; Mortality; Growth; Stocking density; Fish culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1427.pdf

Relative importance of family, site, and field placement timing on survival, growth, and yield of hatchery-produced Pacific oyster spat (Crassostrea gigas)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Degremont, Lionel; Bedier, Edouard; Soletchnik, Patrick; Ropert, Michel; Huvet, Arnaud; Moal, Jeanne; Samain, Jean-francois; Boudry, Pierre.
Summer mortality has been reported in the Pacific oyster, Crassostrea gigas, for many years in different parts of the world. The causes of this phenomenon are complex. The multidisciplinary program "MOREST", coordinated by IFREMER, was initiated to understand the causes of summer mortality of Crassostrea gigas juveniles in France and to reduce its impact on oyster production. Within this program, three successive groups of bi-parental families were bred in a hatchery in 2001 and placed in the field during summer in three sites (Ronce, Riviere d'Auray, and Baie des Veys). This paper reports the relative importance of family, site and field placement timing for three characters of major importance for oyster production: survival, growth, and yield. At the...
Tipo: Text
Palavras-chave: Juvenile; Crassostrea gigas; Oysters; Yield; Growth; Survival.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1693.pdf

Evaluation of microdiets versus live feeds on growth, survival and fatty acid composition of larval haddock (Melanogrammus aeglefinus)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blair, Tammy; Castell, Fisheries And Oceans Canada; Neil, Steven; D'Abramo, Louis; Cahu, Chantal; Harmon, Paul; Ogunmoye, Kehinde.
Until recently, it was considered impossible to feed newly hatched marine fish species with a compound diet. Substituting a compound diet for live prey was performed several weeks after hatching, depending on the species. Compound diets were well ingested at the early stage but larvae died with a gut full of food, suggesting that larvae were unable to digest the compound diet. The hypothesis was that younger larvae have insufficient digestive enzymes to thrive on compound diets, and that exogenous enzymes, provided from live prey, are necessary for early stages.  The organogenesis of marine fish larvae is not completely achieved at hatching and histological studies have revealed that the anatomy of the digestive tract undergoes developmental changes over...
Tipo: Text
Palavras-chave: Highly unsaturated fatty acids; Essential fatty acids; Survival; Growth; Artemia; Brachionus plicatilis; Microdiet; Haddock larvae.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/2003/publication-445.pdf

Développement et ajustement d'un modèle de dynamique des populations structuré en longueur et spatialisé appliqué au stock Nord de merlu (Merluccius merluccius)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Drouineau, Hilaire.
The biology of European hake has been largely studied, however some specific processes of its biology, especially growth and migration, are still poorly known. Those uncertainties have consequences on the quality of the stock assessments and on the stock management by limiting the possibility to assess the effect of spatial management measures. Therefore, we develop an integrated length-structured and spatialised model of population dynamics aiming at improving the estimation of unknown parameters of the population dynamic. The model relies on a state model describing the dynamics of the population and the fishing activity, and on an observation model describing the observation processes and providing a likelihood function.  A review of the literature...
Tipo: Text
Palavras-chave: Parameters estimation; Migration; Growth; Sensitivity analysis; Likelihood; Spatialised model; Stock assessment; Length structured model; Hake; Estimation de paramètres; Migration; Croissance; Analyse de sensibilité; Maximum de vraisemblance; Modèle spatialisé; Évaluation des stocks; Modèle structuré en longueur; Merlu.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-3710.pdf

The Paracentrotus lividus populations from the northern Moroccan Atlantic coast: growth, reproduction and health condition
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bayed, Abdellatif; Quiniou, Francoise; Benrha, Ali; Guillou, Monique.
The condition of three intertidal Paracentrotus lividus populations, which inhabit an area between Rabat and Casablanca (Morocco) known by its high wave energy and its substantial anthropogenic disturbances were described. The growth rate of the juvenile sea urchins in this intertidal zone was low compared with more sheltered populations. A sharp increase in the gonad index was observed between January and March at the beginning of a period of algal production, and was concomitant with increases in seawater temperature and food consumption rate. This gonad index increase was followed by a single spawning period occurring between March and June, probably triggered by the phytoplankton bloom induced by upwelling conditions. Larval development in all three...
Tipo: Text
Palavras-chave: Moroccan Atlantic; Growth; Population; Juvenile; Reproduction.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-602.pdf

Les besoins écophysiologiques des larves d'huitres creuse Crassostrea gigas en conditions contrôlees : effet de la température, de la nourriture et modélisation de la croissance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rico Villa, Benjamin.
Nowadays, spat production of Pacific oyster Crassostrea gigas relies on rearing techniques under controlled conditions in hatchery. In this context, an extensive research in aquaculture is necessary because larval development and metamorphosis are critical for hatchery management. Firstly, a diet consisted in a Haptophyceae: Isochrysis affinis galbana (clone T-ISO) and a Bacillariophyceae: Chaetoceros calcitrans forma pumilum demonstrated its efficiency to supply the nutritional needs throughout the whole larval rearing. Then, a flow-through rearing system was developed and coupled with a continuous hydrobiological data recorder to provide basic information for ecophysiology research through different trophic levels and/or temperature throughout larval...
Tipo: Text
Palavras-chave: Crassostrea gigas; Larve; Huître; Croissance; Ecophysiologie; Microalgues; Température; Système d’élevage; Modélisation; Crassostrea gigas; Larvae; Oyster; Growth; Ecophysiology; Microalgae; Temperature; Rearing System; Modelling.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00012/12308/9102.pdf

Réseau d'évaluation de la croissance de l'huître creuse sur les côtes françaises (REMORA) ; résultats des stations de BRETAGNE (Année 1999)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Claude, Serge; Bouget, Jean-francois; Langlade, Aime; Le Coguic, Yvette.
The network IFREMER/ REMORA watches every year, from February to December, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year class ; and "adults" = two-years class), distributed among various stations of the main French oyster areas. This network is a tool for trend estimations (geographic and chronological, on the national scale). With regard to the Breton stations of the network, the year 1999 showed a small increase of mortality rates, both in adults alter their transfer on the REMORA stations and in juveniles during the Summer season. this was particularly observed in Morlaix, Aber Benoît and Pen-Bé. Although it was better than 1998, the year 1999 was a poor year for growth, especially in North Brittany (62.5 g in...
Tipo: Text
Palavras-chave: REMORA; Bretagne; Huître creuse; Mortalité; Croissance; Qualité commerciale; Polydora; REMORA; Brittany; Gigas oyster; Mortality; Growth; Commercial quality; Polydora.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00113/22388/20083.pdf

Programme général de recherche sur la nacre. Écophysiologie de l'huître perlière, approche des relations entre  la croissance de l'huître Pinctada  margaritifera  et le milieu dans le lagon de Takapoto
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Buestel, Dominique; Pouvreau, Stephane; Tiapari, Jerome; Bougrier, Serge; Chabirand, Jean-michel; Geairon, Philippe; Fougerouse, A.
A study of pearl oysters Pinctada margaritifera growth and mortality was done on a monthly basis between June 1990 and September 1991 in Takapoto atoll (Tuamotu archipelago). Meanwhile, sampling parameters representative of bivalves food showed a remarquable spatial stability whithin the lagoon. The amplitude of temporal variability varied in the order of some days. Carrying capacity appears low : energetic content of particulate material in waters is about 2 joules/liter, ten times lower than in temperate areas. On the opposite, seasonal effect is reduced and particulate food is always available. Oysters rearing conditions were appropriate during the studied period with a low mortality rate and a regular growth in size (from 97 mm to 136 mm). Pearls...
Tipo: Text
Palavras-chave: Atoll; Pearl oyster; Carrying capacity; Growth; Pinctada margaritifera; Atoll; Huître perlière; Capacité Trophique; Croissance; Pinctada margaritifera.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/rapport-1642.pdf

Major changes in sardine growth and body condition in the Bay of Biscay between 2003 and 2016: Temporal trends and drivers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Veron, Matthieu; Duhamel, Erwan; Bertignac, Michel; Pawlowski, Lionel; Huret, Martin.
In the Bay of Biscay, mean body length and weight of sardines (Sardina pilchardus) have been decreasing since the early 2000s and could severely impact the fishing and seafood industry sector. These trends have no apparent link with fishing pressure, although the latter has been increasing since the late 2000s. As part of an effort to develop suitable assessment and management tools for this stock, we investigated the life-history traits of sardine and analyze its seasonal and inter-annual variations. Based on 14 years of morphometric data from both scientific surveys and professional samples, we analyzed the variability in sardine body condition and its responses to environmental changes. Generalized Additive Models revealed an age-sex specific decreasing...
Tipo: Text
Palavras-chave: Body condition; Growth; Decadal trends; Environmental effect; Life history traits; Sardina pilchardus; Bay of Biscay.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00604/71562/69989.pdf

Croissance et mortalite du petoncle noir Chlamys varia dans le bassin d'Arcachon, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Trut, Gilles; Robert, Rene; Laborde, Jean-louis.
Until 1960, the Black scallop Chlamys varia was relatively abundant along the French Atlantic coasts. Today most of these natural beds have disappeared. Because mollusc hatchery and nursery techniques have been mastered, the reintroduction of this species, under control, was carried out in several areas and particularly in the bay of Arcachon, from 1989 to 1992. Good results were obtained in hatchery and nursery but the development of the juveniles in the natural fields was poor. The growth of Chlamys varia was satisfactory but heavy mortalities were rapidly recorded which could not be related to the hydrobiological conditions. This species seems to be very sensitive to short emersion and removal operations which are incompatible with aquaculture processes.
Tipo: Text
Palavras-chave: Bassin d'Arcachon; Mortalité; Croissance; Chlamys varia; Mollusque; Bay of Arcachon; Mortality; Growth; Chlamys varia; Mollusc.
Ano: 1994
URL: https://archimer.ifremer.fr/doc/1994/rapport-1567.pdf

Comparison between the opercular bones, the scales and the otoliths to investigate the growth of the brilliant pomfret (Eumegistus illustris) off the coast of Reunion Island (SW Indian Ocean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig; Rabhi, Khalef; Bellamy, Elise; Elleboode, Romain; Aumond, Yoann; Huet, Jerome; Roos, David.
The brilliant pomfret (Eumegistus illustris) occurs in the western part of the Indian Ocean and the western and central Pacific Ocean. To date, the biology of E. illustris has never been documented. The aim of the present study was to investigate age and growth of E. illustris along the coasts of Reunion Island, based on calcified structures analysis. One hundred thirty five individuals were sampled in the landings of the French local artisanal fisheries from March 2014 to March 2015. The relationships between two types of body length (Total and Standard lengths, cm) and Total weight (g) were significant (P&lt;0.05). Total length-weight relationship was described by the following parameters: a=0.012 and b=3.015 without significant effect of sexual...
Tipo: Text
Palavras-chave: Eumegistus illustris; Growth; Scale; Otolith; Opercular bone; Indian Ocean; Reunion island.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00307/41861/41113.pdf

Consequences of bias in age estimation on assessment of the northern stock of European hake (Merluccius merluccius) and on management advice
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bertignac, Michel; De Pontual, Helene.
The results of a pilot tagging study on hake (Merluccius merluccius), conducted in the northern part of the Bay of Biscay in 2002, indicate that growth rates for this stock may be currently underestimated because of biased estimates of age. The impact that such a bias may have on the stock dynamics and the trends of the key population parameters, recruitment, spawning-stock biomass (SSB), and mortality are investigated. Assuming new growth parameters, a new age-length key is derived and used to produce and catch-at-age data and abundance indices, which are then used to assess the stock. Bias in estimating age affects the absolute levels of fishing mortality and stock biomass estimates, and also impacts the trend in SSB. However, trends in fishing mortality...
Tipo: Text
Palavras-chave: Tagging; Stock assessment; Simulation; Management; Growth; European hake; Age estimation.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2824.pdf

Aquaculture of red tilapia Oreochromis sp. in marine environments: State of the art.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Watanabe, W; Ernst, D; Olla, B; Wicklund, R.
The Caribbean Marine Research Centre is conducting research on the development of methods for intensive culture of euryhaline red tilapias in marine environments for application to Caribbean islands and similar regions with limited freshwater resources.
Tipo: Text
Palavras-chave: Survival; Growth; Eggs; Brood stocks; Incubation; Brackish water; Seed (aquaculture); Food conversion; Hatcheries; Controlled conditions; Diets; Floating cages; Sea water; Salinity tolerance; Intensive culture; Fingerlings.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1493.pdf

Models projecting the fate of fish populations under climate change need to be based on valid physiological mechanisms
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lefevre, Sjannie; Mckenzie, David J.; Nilsson, Goran E.
Some recent modelling papers projecting smaller fish sizes and catches in a warmer future are based on erroneous assumptions regarding (i) the scaling of gills with body mass and (ii) the energetic cost of 'maintenance'. Assumption (i) posits that insurmountable geometric constraints prevent respiratory surface areas from growing as fast as body volume. It is argued that these constraints explain allometric scaling of energy metabolism, whereby larger fishes have relatively lower mass-specific metabolic rates. Assumption (ii) concludes that when fishes reach a certain size, basal oxygen demands will not be met, because of assumption (i). We here demonstrate unequivocally, by applying accepted physiological principles with reference to the existing...
Tipo: Text
Palavras-chave: Aerobic scope; Gill surface area; Growth; Metabolism; Oxygen consumption; Respiration; Scaling.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00395/50621/51449.pdf

Responses of European anchovy vital rates and population growth to environmental fluctuations: An individual-based modeling approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pethybridge, Heidi; Roos, David; Loizeau, Veronique; Pecquerie, Laure; Bacher, Cedric.
A size-structured, bioenergetics model was implemented to examine the effects of short-term environmental changes on European anchovy, Engraulis encrasicolus, in the North-western Mediterranean Sea. The model approach was based on Dynamic Energy Budget (DEB) theory and details the acquisition and allocation of energy (J d(-1)) during an organisms' full life-cycle. Model calibration was achieved using biometric data collected from the Gulf of Lions between 2002 and 2011. Bioenergetics simulations successfully captured ontogenetic and seasonal growth patterns, including active growth in spring/summer, loss of mass in autumn/winter and the timing and amplitude of multi-batch spawning events. Scenario analysis determined that vital rates (growth and fecundity)...
Tipo: Text
Palavras-chave: Engraulis encrasicolus; NW Mediterranean Sea; Environmental variability; Dynamic Energy Budget theory; Growth; Fecundity.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00127/23822/22490.pdf

Growth and gonad development of the tropical black-lip pearl oyster, Pinctada margaritifera (L.), in the Gambier archipelago (French Polynesia)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Moullac, Gilles; Tiapari, Jerome; Teissier, Hinano; Martinez, Elodie; Cochard, Jean-claude.
The growth and reproductive cycle of cultured black-lipped pearl oysters, Pinctada margaritifera (L.), were studied in the Gambier Islands (134°52' W, 23°07' S) from September 2002 to August 2003. Temperatures were recorded throughout the year, revealing seasonal temperature variations between 22.3 °C and 27.8 °C. The mean annual chlorophyll a value, as computed from satellite data, was 0.188 ± 0.075 µg L-1. To study growth and reproduction, 720 two-year-old individuals were ear hung on longlines suspended at a depth of 7 m. Samples were taken twice a month to obtain the following measurements: shell height; wet weight of flesh and total oyster; dry weight of adductor muscle, mantle and visceral mass; and glycogen content. Gonad development was also...
Tipo: Text
Palavras-chave: Pearl oyster; Pinctada margaritifera; Growth; Reproduction; Temperature; Chlorophyll; Seasonality; Gambier archipelago.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00040/15099/13570.pdf

Teneur en ADN de la larve de Dicentrarchus labrax : évolution ontogénétique et effet de la privation de nourriture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bergeron, Jean-pierre; Person, Jeanine.
Sea bass Dicentrarchus labrax larvae were hatched and reared for 34 days in the laboratory to test a recent biochemical index (DNA/C) of larval fish nutritional condition. Variations in DNA/C ratio values were monitored during the whole larval ontogenesis of fed individuals and the effect of starvation was assessed at three developmental stages. Three main periods in the relative DNA content variations were determined in close connection with growth patterns during larval ontogenesis.
Tipo: Text
Palavras-chave: Dicentrarchus labrax; DNA/C; Nutritional condition; Starvation; Growth; Biochemical index.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00072/18300/15875.pdf

Feed demand behavior in sea bass juveniles: Effects on individual specific growth rate variation and health (inter-individual and inter-group variation)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Millot, Sandie; Begout, Marie-laure; Person, Jeannine; Breuil, Gilles; Di Poi, C; Fievet, Julie; Pineau, Philippe; Roue, M; Severe, Armelle.
Feeding motivation is one major indicator of fish welfare and an investigation on the link between feed demand, growth and physiological variables in sea bass juveniles was developed. A computerized on-demand feeding system coupled with a PIT tag monitoring device was used to continuously record for 219 days the triggering activity of 150 individuals (initial average body weight 131.6 +/- 1.80 g and coefficient of variation 16.8%). Each group was held in 400 1 tanks at 22.2 +/- 1.5 degrees C and light regime was 16:8 LD. In all the tanks, 89% of the fish actuated the trigger, but only two or three fish accounted for 45% of the total triggering activity. These few high-triggering individuals had a transient higher growth i.e. at the time an individual was...
Tipo: Text
Palavras-chave: Welfare; Social interaction; Growth; Feeding activity.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3738.pdf

Genotype by environment interactions for growth in European seabass (Dicentrarchus labrax) are large when growth rate rather than weight is considered
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dupont-nivet, Mathilde; Karahan-nomm, Bilge; Vergnet, Alain; Merdy, Olivier; Haffray, Pierrick; Chavanne, Herve; Chatain, Beatrice; Vandeputte, Marc.
Two hundred fifty three full-sib families from 33 males and 23 females of European seabass were produced in a partly factorial mating design. All fish were reared in the same tank for 14 months until reaching mean weight of 35 g. then 7000 of them were individually tagged and weighed, and dispatched to four farms in different locations (France, Israel, Italy and Portugal) representing a wide variety of environmental conditions. Around mean weight of 400 g. 1177 to 1667 fish at each site were weighed. Daily growth coefficient (DGC) was calculated. Pedigrees were successfully redrawn for 99.2% of fish using microsatellite markers. Genetic correlations between sites were high for body weight (&gt;0.80 in all cases but one, i.e., five cases over six), but only...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Seabass; Growth; Daily growth coefficient; Heritability; G x E interactions; Aquaculture.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12256/9227.pdf

Effect of trematode parasites on cockle Cerastoderma edule growth and condition index: a transplant experiment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Montaudouin, X.; Bazairi, H.; Culloty, S.
We quantified the effect of trematode parasites in cockles through a 303 d transplant experiment. Cockles were sampled in 3 different sites on the southwest coast of France characterized by 3 different trematode communities, i.e. Royan (RO): high Meiogymnophallus minutus abundance near cockle heart, South Arguin (SA): high Himasthla interrupta abundance in the mantle margin, and North Arguin (NA): almost free of trematodes. Sampled cockles were individually tagged and placed in different cages at Banc d'Arguin, Arcachon Bay. At the end of the experiment, RO cockles had lost their trematodes, highlighting the fact that trematode lifespan can be short, while SA cockles maintained their trematode load. When cockles were the second intermediate host, there was...
Tipo: Text
Palavras-chave: Cerastoderma edule; Parasitism; Growth; Mortality; Condition index; Transplant experiment.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00375/48640/49090.pdf

Chronic and severe hypoxic conditions in Paracas Bay, Pisco, Peru: Consequences on scallop growth, reproduction, and survival
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aguirre-velarde, Arturo; Thouzeau, Gerard; Jean, Frederic; Mendo, Jaime; Cueto-vega, Rosa; Kawazo-delgado, Midori; Vásquez-spencer, Jazmín; Herrera-sanchez, Diego; Vega-espinoza, Alex; Flye-sainte-marie, Jonathan.
The response of Argopecten purpuratus (Peruvian scallop) to environmental conditions was studied in the upwelling-influenced Bay of Paracas (Peru). Scallops growth and reproduction were monitored weekly over a 7-month period under two conditions (culture depths): on the bottom and 2 m above (suspended culture). At the same time, a high-frequency environmental monitoring was realized at the aforementioned depths. The results indicate that environmental conditions in the Bay are highly variable, especially during the summer: temperature fluctuations up to 8∘C were recorded in less than one day while oxic conditions ranged from oversaturation to anoxia. Milky-turquoise waters discoloration events (sulphide presence suspected) were simultaneously observed...
Tipo: Text
Palavras-chave: Argopecten purpuratus; High frequency monitoring; Coastal upwelling; Hypoxic/anoxic conditions; Growth; Reproduction; Aquaculture; Milky-turquoise water/aguas Blancas.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00504/61547/65430.pdf

Croissance de juvéniles de Nereis diversicolor nourris avec des détritus d'halophytes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Meziane, T; Retiere, C.
The comparative effect of the uptake of fresh and degraded detritus of halophytic plants, harvested from salt marches of the Mont Saint-Michel Bay (France), on the growth of a juvenile population of the annelid polychaete N. diversicolor (L.) was studied under experimental conditions in summer 1993. Fresh and degraded detritus of Spartina anglica, Halimione portulacoides and Salicornia europeae, as well as the green algae Enteromorpha sp. were distributed separately to homogenous set of juveniles for a 75 d period. The highest growth rate was obtained for worms fed with Enteromorpha sp. Administration of fresh detritus of a given halophyte species to N. diversicolor juveniles always leads to a significantly higher growth rate than did degraded detritus....
Tipo: Text
Palavras-chave: Nereis diversicolor; Croissance; Halophytes; Détritus; Nereis diversicolor; Growth; Halophytes; Detritus.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43312/42962.pdf

Définition d'un modèle d'élevage larvaire intensif pour la daurade Sparus auratus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ounais-guschemann, Nadia.
This study defines rearing parameters for mass products of 30-day old post larvae. Continuous lighting (600 lux) optimizes the predatory activity and suppresses the feeding rhythm. For 4-5 mm larvae (15 days), food ingestion slows down if the prey concentration in the tank is below 5 rotifers/ml, while there is no such threshold for 6-7 mm larvae (22 days). The rotifer Brachionus plicatilis , between 100 and 200 mu m, is an adequate initial prey, it can be replaced by Artemia salina for 7-8 mm larvae (30 days). It is observed that free amino acids and essential fatty acids contents have a prominent role in larvae growth; docosahexaenoic acid (C22:6n-3) content could be determined. Finally, the development of the swim bladder is facilitated by the renewal...
Tipo: Text
Palavras-chave: Sparus auratus; Pisces; Marine fish; Environmental diseases; Fatty acids; Amino acids; Controlled conditions; Juveniles; Culture tanks; Growth; Light effects; Nutritional requirements; Fish larvae; Syndrome de paroi; Nutrition; Alimentation; Lumière; Inflation primaire de la vessie natatoire; Sparus auratus; Elevage larvaire intensif; Poisson.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/these-1679.pdf

Etude et modélisation de la dynamique des populations de bivalves en élevage (Crassostrea gigas et Mytilus galloprovincialis) dans le bassin de Thau (Méditerranée, France) et des ascidies solitaires associées
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gangnery, Aline.
The total standing stock of bivalves cultured in Thau Lagoon (France) that is mainly constituted of the Pacific oyster, Crassostrea gigas, and the Mediterranean mussel, Mytilus galloprovincialis, vary between 14,000 and 20,000 tons within a year. These variations were attributed to the rearing cycle of molluscs in the lagoon but also to their growth performances. Oysters cultured in the Thau Lagoon presented the best growth rate ever reported whereas trophic conditions are low : mean concentrations in organic particulate matter and total chlorophyll a averaged 1 mg.l-1 and 1.2 µg.l-1, respectively. The development of a growth model shows that temporal pattern (i.e. seasonality) of bivalve growth is explained by water temperature and spatial pattern is...
Tipo: Text
Palavras-chave: Lagoon ecosystem; Resource management; Rearing strategies; Production; Standing stock; Hydrobiology; Growth; Shellfish culture; Ascidiella aspersa; Mussel; Oyster; Ecosystème lagunaire; Gestion des ressources; Stratégies d'élevage; Production; Stock; Hydrobiologie; Croissance; Conchyliculture; Ascidiella aspersa; Moule; Huître.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/these-102.pdf

Variability and controls of otolith growth in the anchovy of the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petitgas, Pierre; Grellier, Patrick; Duhamel, Erwan; Masse, Jacques; Doray, Mathieu.
Individual fish growth depends on internal population factors such as phenotypic variability as well as external factors such as past environmental conditions (temperature, food) and selective mortality (predation or fishing). In the anchovy, growth in the first year is key to population dynamics as it determines the potential energy allocated to reproduction as well as the capacity to occupy off-shore habitats. Further, in the recent past, the anchovy in the bay of Biscay has experienced collapse and recovery and the role played by growth in this history is unknown. Since 2001 with the spring acoustic survey series PelGas, we have monitored individual fish growth by measuring in the otolith the increments between annual rings, in addition to age...
Tipo: Text
Palavras-chave: Anchovy; Biscay; Otoliths; Growth; Metapopulation.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00114/22550/20236.pdf

Bases génétiques des caractères physiologiques impliqués dans la croissance chez l'huître creuse Crassostrea gigas (Thunberg)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Collet, Bertrand.
Growth is a very important trait in the oyster Crassoslrea gigas both from an economical and scientific point of view. Many questions remain unanswerable or are still discussed . From a hatchery-based population, the constancy in time of growth performances From larval to adult stage was studied. The influence of physiological parameters (energy acquisit ion and expenditure) and parentage on growth was estimated. ln the literature, the relationship between larval growth and post-Iarval growth is debated . Our study shows that the larval growth is positively correlated with the post-Iarval growth. This result validates the hatchery practices consisting in culling the small larvae. The growth performances are stable over the time and show no compensation....
Tipo: Text
Palavras-chave: Crassostrea gigas; Croissance; Physiologie; Analyse de parenté; Microsatellite DNA; Crassostrea gigas; Growth; Physiology; Parentage analysis; Microsatellite DNA.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00108/21939/19532.pdf

Alexandrium ostenfeldii growth and spirolide production in batch culture and photobioreactor
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Medhioub, Walid; Sechet, Veronique; Truquet, Philippe; Bardouil, Michele; Amzil, Zouher; Lassus, Patrick; Soudant, Philippe.
Growth and spirolide production of the toxic dinoflagellate Alexandrium ostenfeldii (Danish strain CCMP1773) were studied in batch culture and a photobioreactor (continuous cultures). First, batch cultures were grown in 450 mL flasks without aeration and under varying conditions of temperature (16 and 22 degrees C) and culture medium (L1, f/2 and L1 with addition of soil extract). Second, cultures were grown at 16 degrees C in 8 L aerated flat-bottomed vessels using L1 with soil extract as culture medium. Finally, continuous cultures in a photobioreactor were conducted at 18 degrees C in L1 with soil extract; pH was maintained at 8.5 and continuous stirring was applied. This study showed that A. ostenfeldii growth was significantly affected by temperature....
Tipo: Text
Palavras-chave: Alexandrium ostenfeldii; Batch; Growth; Photobioreactor; Spirolide production.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00049/16050/15784.pdf

Effect of size grading on sea bass (Dicentrarchus labrax) juvenile self- feeding behaviour, social structure and culture performance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benhaim, David; Pean, Samuel; Brisset, Blandine; Leguay, Didier; Begout, Marie-laure; Chatain, Beatrice.
This study aims to test the influence of size grading on self-feeding behaviour, social structure (measured by the percentage of triggering acts per individual), growth performances, and blood physiological variables of individually passive integrated transponder (PIT)-tagged sea bass juveniles, using a computerized on-demand feeding system coupled with a PIT tag monitoring device. Three consecutive periods of 27 days each were compared: a first period (P1) before grading (6 tanks of 100 fish; 40.2 +/- 8.9 g) followed by a second period (P2) after grading. The protocol applied aimed to create two groups of fish of similar mean weight but with either a low or a high coefficient of variation of weight (CV(w)) corresponding to an imposed difference in social...
Tipo: Text
Palavras-chave: Feeding behaviour; Self feeder; Triggering activity; Heterogeneity; Growth; Grading.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00057/16858/14340.pdf

Bilan des connaissances sur la cardine (Lepidorhombus whiffiagonis ). Etude du stock de Mer Celtique.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aubin-ottonheimer, G.
This study presents the biology of the species Lepidorhombus whiffiagonis (ecology, nutrition, sexuality, growth weight and length) and its exploitation with the balance of catches in North Atlantic and its fishing in Celtic Sea. Yield and fecundity per recruit related to the fishing effort are estimated. The influence of the mesh size modifications is analyzed. The impact of uncertainty on the values of the parameters modelling and individual variability within the growth is analyzed.
Tipo: Text
Palavras-chave: Growth; Stock assessment; Fishery management; Fishery biology; Synopsis.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/publication-1782.pdf

Etude de la croissance des baudroies, Lophius piscatorius et L.budegassa , de l'Atlantique nord-est obtenue a partir de l'illicium.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dupouy, Herve; Pajot, Régis; Kergoat, Bernard.
The growth in length of the two European anglerfishes (Lophius piscatorius and L. budegassa ) was studied from samples collected in ICES areas VII and VIII during 1984. Because of the difficulty on otoliths reading, a method based on illicium sections was developed. Moreover, morphological features of the sections can be useful in separating the two species. The location of winter rings was measured; length-frequency analysis and backcalculation was used as a first attempt to validate direct ageing.
Tipo: Text
Palavras-chave: Lophius budegassa; Lophius piscatorius; Length weight relationships; Age determination; Growth.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1794.pdf

Breeding and Domestication of Eastern Oyster (  Crassostrea virginica  ) Lines for Culture in the Mid-Atlantic, Usa: Line Development and Mass Selection for Disease Resistance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Frank-lawale, Anu; Allen, Standish K.; Degremont, Lionel.
A selective breeding program for Crassostrea virginica was established in 1997 as part of an initiative in Virginia to address declining oyster harvests caused by the two oyster pathogens Haplosporidium nelsoni (MSX) and Perkinsus marinus (Dermo). Housed in the Aquaculture Genetics and Breeding Technology Center (ABC), the objective of the program was to develop and disseminate disease-resistant lines that would enable an oyster culture industry. Today, culture of disease-resistant cultivars accounts formore than 90%of oyster production in the state, where 28.1 million half-shell oysters and 2 billion eyed larvae were sold in 2012. Results of our line development program as of 2006 are reported. Eight ABC lines from 3 genetic groups—East Coast (EC),...
Tipo: Text
Palavras-chave: Crassostrea gigas; Oysters; Selective breeding; Disease resistance; Chesapeake Bay; Growth; Genetic improvement; MSX; Dermo.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00188/29950/28395.pdf

Experimental evidence for a genetic basis to differences in aneuploidy in the Pacific oyster (Crassostrea gigas)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leitao, Alexandra; Boudry, Pierre; Mccombie, Helen; Gerard, Andre; Thiriot-quievreux, Catherine.
Aneuploidy has been previously reported in wild and cultivated Pacific oysters, Crassostrea gigas, and has been shown to be negatively correlated with growth. This is especially important since high variability of growth rate is one of the major problems in the aquacultural production of this species. The existence of a genetic basis for the observed differences in aneuploidy was first investigated through the comparative study of six full-sib families, with mean individual weights ranging from 0.59 to 1.49 g. The slowest growing family was found to have the highest level of aneuploidy. Significant differences in aneuploidy were also found among families when individuals with the same growth rate were sampled. This supports the hypothesis of the existence...
Tipo: Text
Palavras-chave: Oyster; Growth; Genetics; Full sib families; Crassostrea gigas; Aneuploidy; Huître; Croissance; Génétique; Famille de plein frères; Crassostrea gigas; Aneuploïdie.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/2001/publication-2700.pdf

Modeling the impact of hypoxia on the energy budget of Atlantic cod in two populations of the Gulf of Saint-Lawrence, Canada
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lavaud, Romain; Thomas, Yoann; Pecquerie, Laure; Benoit, Hugues P.; Guyondet, Thomas; Flye-sainte-marie, Jonathan; Chabot, Denis.
Like many marine species around the globe, several stocks of Atlantic cod (Gadus morhua) live in increasingly hypoxic waters. In the Gulf of Saint Lawrence (GSL) in Canada, the deep channels traversing the semi-enclosed sea exhibit year-round hypoxia, identified as one of the limiting factor for the recovery of GSL cod in its northern part. While many individuals in the northern GSL are known to venture in deeper, warmer, and more hypoxic waters of the Gulf channels, those in the southern GSL live in a shallower, colder, and more oxygenated environment. In this study, we use the modeling framework of the Dynamic Energy Budget (DEB) theory to disentangle the effects of hypoxia, temperature and food on the life-history traits of these two populations of cod...
Tipo: Text
Palavras-chave: Hypoxia; Dynamic energy budget; Atlantic cod; Growth; Temperature; Gulf of Saint-Lawrence.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00448/55966/57472.pdf

Modélisation de la croissance des poissons en élevage
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Muller-feuga, Arnaud.
After a literature overview of growth models applied to intensively cultured fishes, a new one is proposed for assistance in rearing operations, with following characteristics. A simple and integratable mathematic expression simulates growth while eliminating individual weight influence. It gives way to a specific growth general definition. Temperature action mode on growth speed is simulated by substraction of two exponential functions. An automatic calculation method of thermal parameters is proposed. The torpid action of low temperatures is considered. Feeding ration influences growth through simple rules which are explicitly taken in account by mean of a two parameters function. The other growth factors, more difficult to seize, are expressed through a...
Tipo: Text
Palavras-chave: Modèle; Croissance; Élevage poissons; Pisciculture; Model; Fish culture.; Growth.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00183/29428/27794.pdf

Genetic variation for growth at one and two summers of age in the common carp (Cyprinus carpio L.): Heritability estimates and response to selection
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandeputte, Marc; Kocour, M; Mauger, S; Rodina, M; Launay, A; Gela, D; Dupont Nivet, M; Hulak, M; Linhart, O.
We estimated the heritability of growth-related traits (weight and length at ages one summer, first spring and two summers) in a synthetic mirror carp strain (HSM) in the Czech Republic. The four generation pedigree was obtained from parentage assignment of three factorial mating designs with microsatellite markers, and included 195 fish without phenotypes (48 G0, 147 G1) and 1321 fish with phenotypes (674 G2, 647 G3). Animal model heritability estimates over generations were in the range 0.21-0.33 for length and in the range 0.31-0.44 for weight. The genetic correlation between length and weight was high (0.97). The correlations between growth measurements in the first and in the second summer of age were moderate to low (0.34-0.67). Divergent selection...
Tipo: Text
Palavras-chave: Quantitative genetics; Performance; Microsatellites; Parentage assignment; Realized heritability; Selection response; Selection; Growth; Heritability; Cyprinus carpio; Common carp.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4076.pdf

Influence des variations des facteurs environnementaux sur la croissance de poissons de l'Atlantique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barrios, Alexander.
The impact of biotic factors such as density-dependent processes, recruitment, total mortality, and abiotic factors such as upwelling intensity, temperature and chlorophyll a concentration on the variation of growth parameters of pelagic and demersal fish were studied during the periods 1990 - 2008 (pelagic) and 1971 - 2015 (demersal). Life history parameters vary according to the species and from one region to another and over time within a given area because of their plasticity and the high fishing pressure. Interspecies and inter-regional comparison were carried out. Non-linear mixed effects models were used on different fish species of the Atlantic Ocean in order to estimate the growth parameters at the individual and population levels. Variations in...
Tipo: Text
Palavras-chave: Croissance; Gadidés; Clupéidés; Atlantique; Otolithe; Modèle de von Bertalanffy; Modèles à effets mixtes.; Growth; Gadides; Clupeids; Atlantic; Otolith; Von Bertalanffy growth model; Mixed effects models.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00419/53026/53960.pdf

The role of astaxanthin in shrimp pigmentation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Latscha, T.
Carotenoids are exogenously derived isoprenoid compounds which are responsible for pigmentation in crustaceans. While implants and bacteria are able to synthesize these carotenoids de novo, shrimps like other animals entirely depend on their dietary supply. The major carotenoid found in most crustacean tissues and responsible, e.g. for the typical colour of penaeids is astaxanthin. With increasing industrialization in shrimp farming there is a growing demand for synthetic, nature-identical carotenoids, not only for pigmentation, but also for the maintenance of growth and fertility.
Tipo: Text
Palavras-chave: Metapenaeus monoceros; Penaeus japonicus; Penaeus monodon; Penaeidae; Marine crustaceans; Marine invertebrates; Diets; Fertility; Growth; Marine aquaculture; Shrimp culture; Colour.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1466.pdf

Élevage de la palourde japonaise Ruditapes philippinarum dans le bassin d'Arcachon. Bilan des dix dernières années et  perspectives de développement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Rene; Deltreil, Jean-pierre.
Farming of the Japanese clam Ruditapes philippinarum took place for the first time in 1980 in the Arcachon basin. After an experimentation period of about ten years, a farming strategy, taking into consideration the distinctive features found in the bay, was able to emerge. For example, in order to fight against clam predators, crabs such as Carcinus maenas, and balistes such as Balistes capriscus, vertical protection coupled with prior ground gravelling, and laying of nets over the beds during the summer months, have become necessary. The best raising technique seems to rest on early spring planting of middle size spats (T5), after checking that no brown rings are visible. If clam growth seems to be better in oceanic zones, it looks similar in other areas...
Tipo: Text
Palavras-chave: Basin of Arcachon; Culture methods; Growth; Predation; Balistes capriscus; Carcinus maenas; Ruditapes philippinarum; Bassin d'Arcachon; Stratégie d'élevage; Croissance; Prédation; Balistes capriscus; Carcinus maenas; Ruditapes philippinarum.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-1652.pdf

Growth, feeding and distribution of the solenette Buglossidium luteum with particular reference to its habitat preference
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Amara, Rachid; Mahe, K; Le Pape, Olivier; Desroy, N.
Growth, condition, diet and spatial distribution of the solenette Buglossidium luteum (Risso, 1810) were investigated along the coasts of the French Atlantic, eastern English Channel and Southern Bight of the North Sea. Distribution and habitat preferences of solenette were analysed in relation to physical and biological features presumed to influence fish distribution. B. luteum was patchily distributed and concentrated in shallow muddy and muddy-sand bottoms moderately influenced by estuarine waters (euhaline waters). In the studied area, solenette seemed to find habitats suitable for growth. Food availability was not assumed to be a limiting factor for solenette distribution in contrast to abiotic factors such as salinity.
Tipo: Text
Palavras-chave: Solenette; Habitat suitability; Distribution; Feeding; Growth.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-777.pdf

Effect of Bentazon on Growth and Physiological Responses of Marine Diatom: Chaetoceros gracilis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hourmant, Annick; Amara, Anis; Pouline, Patrick; Durand, Gael; Arzul, Genevieve; Quiniou, Francoise.
The herbicide bentazon (CASRN 25057-89-0) is extensively used in agriculture in Brittany (France) to replace atrazine. Bentazon is not readily adsorbed by soil and therefore it enters adjacent freshwater ecosystems, making its way to estuarine and marine waters areas. Information regarding its effects on marine ecosystems is scarce. Phytotoxicity assessments were conducted in the laboratory on the common diatom Chaetoceros gracilis using both the active ingredient and its formulated product (Basamais). The 3 day EC50 Using cell counts were, respectively, 150 mg/L and 60 mu g/L for bentazon active ingredient and for bentazon-formulated while cellular volume was increased. Although bentazon is known as a photosystem II inhibitor, it produced an increase of...
Tipo: Text
Palavras-chave: Photosynthesis; Marine diatom; Growth; Chlorophylls; Chaetoceros gracilis; Carotenoids; Bentazon; ATP.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6637.pdf

Strategie de repeuplement du mollusque gasteropode Concholepas concholepas (B) au sud du Chili
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Varelasantibanez, C.
The reproducers are kept in the laboratory throughout the year and the egg-carrying capsules can be stimulated during this entire period. The capsules are then transferred to the natural environment where hatching takes place. Moreover, juveniles taken in the natural environment can be farmed in suspended systems, at sea, where their growth is faster than in a controlled environment.
Tipo: Text
Palavras-chave: Chile; Concholepas concholepas; Gastropoda; Marine molluscs; Nutrition; Raft culture; Juveniles; Hatcheries; Growth; Laboratory culture; Sexual reproduction; Aquaculture; Rearing.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-927.pdf

Does the prevalence of Bonamia  and Marteilia diseases be reduced on flat oysters (Ostrea edulis) of Atlantic and Mediterranean origin, when they are reared together with the Japanese oyster (Crassostrea gigas) in tidal ponds?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodoy, Alain; Bougrier, Serge; Geairon, Philippe; Garnier, Jacqueline; Boulo, Viviane; Heurtebise, Serge.
The flat oyster Ostrea edulis was originally reared in several regions of the European waters. The tidal saline ponds on the Atlantic coasts of France were highly productive before being hit by two consecutive epizooties. Parasitic diseases were described on this species, both of them leading 10 economic losses, as heavy mortalities have usually been recorded before the oysters reach the commercial size. Repeated experiments showed that the two diseases, Marteilia refringens and Bonamia ostreae are still active in this environment. Recently, some evidences were given that haemocytoblasts of Crassostrea gigas had the ability to lyze the Bonamia cells. Therefore, in an experiment of contiguous culture of the two species of oysters, the growth, mortality and...
Tipo: Text
Palavras-chave: Molluscs; Mortalities; Growth; Pathology; Crassostra gigas; Ostrea edulis; Marteilia refringens; Bonamia ostreae.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-3049.pdf

Biologie et peche du capitaine Lethrinus enigmaticus (Smith) 1959 du banc de Saya de Malha (Ocean Indien)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lebeau, A; Cueff, J.-c.
I.S.T.P.M. lab of La Reunion (Indian Ocean) studies L. enigmaticus, its taxonomy, morphology, ecology, biology, feeding, reproduction and growth, and its fishing in the La Reunion and Mauritius Islands area.
Tipo: Text
Palavras-chave: Lethrinus; Lethrinus nebulosus; Lethrinus borbonicus; Lethrinus caeruleus; Lethrinella xanthocheilus; Lethrinella variegatus; Lethrinus enigmaticus; Fishing; Fishing effort; Growth; Reproduction; Feeding behaviour; Feeding; Organism morphology; Taxonomy; Marine ecology.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-2030.pdf

Assessing the impact of discretisation assumptions in a length-structured population growth model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Drouineau, Hilaire; Mahevas, Stephanie; Bertignac, Michel; Fertin, A.
Most of the traditional assessment models are age-structured. However, many biological and exploitation processes are more length-dependent than age-dependent, and the required length-age conversion of available data is often not reliable. Consequently, length-structured or age-length structured models have undergone considerable development in recent years. The growth transition matrix used to model the mean growth and growth variability of the population, is of primary importance in a length-structured matrix model. Building this growth transition matrix is not trivial and it is necessary to assess the impact that various assumptions may have to identify robust model structures. In this study, we assess the effects of (1) time and length discretisation,...
Tipo: Text
Palavras-chave: Sensitivity analysis; Discrete model; Growth; Length structured model.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4301.pdf

Biofouling development and its effect on growth and reproduction of the farmed pearl oyster Pinctada margaritifera
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lacoste, Elise; Le Moullac, Gilles; Levy, Peva; Gueguen, Yannick; Gaertner-mazouni, Nabila.
In bivalve aquaculture, dominant fouling organisms are filter feeders which can compete for food with reared bivalves, sometimes causing mortality or reducing their growth rate. This study investigated the effect of biofouling on the farmed pearl oyster Pinctada margaritifera in two lagoons of French Polynesia. Survival, growth and reproduction of 2 year-old pearl oysters were monitored with regular sampling schedules, from the initial stage of colonization up to 20 months of biofouling accumulation. Control groups of pearl oysters were kept free of biofouling as is the current practice in pearl farms. After more than a year of monitoring, no significant difference was recorded in shell growth rate between pearl oysters reared with epibionts and the...
Tipo: Text
Palavras-chave: Pearl oyster culture; Pinctada margaritifera; Biofouling; Growth; Reproduction.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00201/31188/29587.pdf

Modelisation of oyster shell growth at 3 stations in the Patuxent river (Chesapeake Bay)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prou, Jean; Goulletquer, Philippe; Bacher, Cedric.
In oyster production area the determination of the stock, estimation of mortality and growth rates are determinant for knowledge of the fishery. Growth models can be used to predict the time to reach marketable size (76 mm in Chesapeake Bay). They are also important in term of management, when they can predict the future value of the stock (Askew, 1978). Oyster growth models can be built by analysing growth of natural oysters but absolute age is orten unknown. Many authors report growth data in Chesapeake Bay for suspended oyster culture. Unfortunalely, modelisation of the growth was not developed. In that study oyster, shell growth models have been established at three stations in the Patuxent river. Seasonal eITects on growth were integrated in the model
Tipo: Text
Palavras-chave: Modelisation; Oysters; Crassostrea virginica; Growth; Chesapeake Bay.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00200/31109/29512.pdf

Intensive larval rearing trials of red drum (Sciaenops ocellata ) in Martinique (F.W.I.).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soletchnik, Patrick; Thouard, Emmanuel; Goyard, Emmanuel.
The red drum Sciaenops ocellata (Linneaus, 1766) was introduced in Martinique (F.W.I.) from the United States (Texas and Florida). Thirteen intensive larval rearing attempts, from 7 batches of imported eggs, have been conducted for two years.
Tipo: Text
Palavras-chave: Pisces; Growth; Larval development; Rearing; Hatching; Nutrition; Stocking density; Food conversion; Growth rate; Survival; Fingerlings; Fish; Eggs.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1434.pdf

Nutritional bioenergetics and estimation of waste production in non-salmonids
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kaushik, Sadasivam.
The general principles behind the bioenergetic approach for predicting growth, as well as for decreasing feed and nutrient losses, have been set forth for salmonids. Given the diversification of fish farming activities around the world and the ever increasing concern for water quality management, it becomes essential to verify whether an approach developed for salmonids is applicable to other species. Given this general background, an attempt is made here to check the theoretical assumptions and technical considerations behind the bioenergetic principles developed for rainbow trout with other freshwater or marine species. From a conceptual point of view, recent literature data do indicate that as far as nitrogen or energy balance is concerned, the general...
Tipo: Text
Palavras-chave: Nutrition; Croissance; Poissons d'eau douce; Poissons de mer; Nutrition; Growth; Freshwater fish; Marine fish.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/1998/publication-869.pdf

The combined effects of feeding time and dietary fat levels on feed intake, growth and body composition in rainbow trout
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gelineau, Anne; Bolliet, Valérie; Corrraze, Geneviève; Boujard, Thierry.
The combined effects of feeding time (morning and evening) and dietary fat concentration on feed intake, growth, body composition and lipid tissue distribution were examined in rainbow trout fed on demand. To that purpose, diets with low (LE, 6% lipid) or high energy concentrations (HE, 24% lipid) were used in four treatments that combined provision of the same (HE-HE or LE-LE) or different (HE-LE, LE-HE) diets at morning and evening meals. Digestible energy intakes of the LE-HE (229 U kg(-1) d(-1)) and HE-HE (269 U kg(-1) d(-1)) groups were significantly different. There was no significant difference in the amount of energy intake between the two meals of the day in any of the treatments. The main effect of dietary treatment was on lipid intake; fish in...
Tipo: Text
Palavras-chave: Oncorhynchus mykiss; Body composition; Feed intake; Growth; Lipid; Feeding time.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/2002/publication-1398.pdf

Effect of nutrition on Crassostrea gigas larval development and the evolution of physiological indices Part B: Effects of temporary food deprivation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ben Kheder, Rym; Quere, Claudie; Moal, Jeanne; Robert, Rene.
In the natural environment bivalve larvae are exposed to variable conditions and can therefore face periods of food shortage. To understand the resistance of early life stages of Pacific oyster (Crassostrea gigas), larvae were experimentally starved for 4 days at different periods of their development, and the resulting variations in their lipid reserves then analysed using image analysis and biochemical techniques. Faced with a temporary lack of food, the larvae halted their growth in size and weight and started to live off their lipid reserves; this effect was highly marked when the period of food deprivation was at the beginning of larval rearing, but was less marked when food deprivation was after day 14. The larvae conserved their developmental...
Tipo: Text
Palavras-chave: Crassostrea gigas; Larvae; Growth; Metamorphosis; Starvation; Lipids.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00018/12906/10145.pdf

The growth of the abalone Haliotis Tuberculata L. in Bay of Brest
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cochard, Jean-claude.
The growth of H. tuberculata L. was studied by analysing the distribution of the growth checks on the shell of 640 individuals. The average lengths of the seven first rings including the first one appear to fit weIl to the Von Bertalanffy model. The value of the growth parameter K = 0,33 is rather similar to those cited in Litterature for the same species but the average attainable size L%= 97,5 seems to be low in this area.
Tipo: Text
Palavras-chave: Growth rings; Growth; Abalone; Ormer; Haliotis tuberculata.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-6380.pdf

La mytiliculture dans le Pertuis Breton - Synthèse des travaux réalisés en 1980 à 1992
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dardignac-corbeil, Marie-jose.
The studies caITied out between 1980 and 1992 in the "Pertuis Breton" demonstrated that mussel growth was systematically reduced near the coastline for a similar emersion time. No relationship was established between current pattern, stocking biomass and growth results. In contrast, poor growth was strongly con'elated to seawater quality and high seston load. Based on these results, the author suggests further studies to adress the issues improved seawater monitoring, studies on factors affecting shellfish quality. Furthermore, specifie studies are proposed to optimize the management of the mussel production in the Pertuis Breton. These include consider how to improve mussel spat recruitment, growth rate, and to specify optimum stocking biomass with...
Tipo: Text
Palavras-chave: Pertuis Breton; Mytilus edulis; Bouchot; Croissance; Pertuis Breton; Mytilus edulis; Bouchot; Growth.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00045/15581/12985.pdf

Methane hydrate nucleation and growth from the bulk phase: Further insights into their mechanisms
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fandino, Olivia; Ruffine, Livio.
Methane hydrate nucleation and growth from a bulk phase has been investigated using a quiescent high-pressure view cell. Several hydrate formation/dissociation cycles have been performed at two different initial pressures (10 MPa and 19.5 MPa). Every experiment was performed with a maximum of five consecutive cycles of cooling/heating. For each cycle, the induction time of incipient hydrate formation has been determined. On one hand, results obtained from cycles using fresh water led to the conclusion that the hydrate formation process is rather stochastic, with induction times varying over a large scale. On the other hand, the whole dataset enabled us to investigate on the controversial memory effect of water which may have the ability to fasten the...
Tipo: Text
Palavras-chave: Methane hydrates; Nucleation; Growth; Quiescent reactor; Memory effect.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00159/27007/25260.pdf

Growth of the black-lip pearl oyster, Pinctada margaritifera, in suspended culture under hydrobiological conditions of Takapoto lagoon (French Polynesia)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pouvreau, Stephane; Tiapari, Jerome; Gangnery, Aline; Lagarde, Franck; Garnier, Matthieu; Teissier, Hinano; Haumani, G; Buestel, Dominique; Bodoy, Alain.
Growth of the black-lip pearl oyster, Pinctada margaritifera var. cumingi, was studied for an annual cycle, from March 1997 to April 1998, in the lagoon of Takapoto atoll (Tuamotu archipelago, French Polynesia). Growth in shell and in tissue were measured every 15 days on three successive age groups of cultivated pearl oysters. At the same time, hydrobiological parameters (temperature, salinity, oxygen concentration, suspended particulate matter), known to have influence on bivalve growth, were followed each week during culture. No seasonal trend was observed in hydrobiological parameters, except for temperature which varied between 26 degrees C and 31 degrees C. The potential food for pearl oysters (particulate organic matter, POM, mg l(-1)) was slightly...
Tipo: Text
Palavras-chave: Pearl culture; Matter in suspension; Biochemical composition; Length weight relations ship; Tropical lagoon; Growth; Pinctada margaritifera.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-381.pdf

An amylase gene polymorphism is associated with growth differences in the Pacific cupped oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prudence, Marie; Moal, Jeanne; Boudry, Pierre; Daniel, Jean-yves; Quere, Claudie; Jeffroy, Fanny; Mingant, Christian; Ropert, Michel; Bedier, Edouard; Van Wormhoudt, A; Samain, Jean-francois; Huvet, Arnaud.
This study investigated the non-neutrality of genetic polymorphism in two alpha-amylase genes (AMYA and AMYB) in the oyster Crassostrea gigas. Bi-parental oyster families, bred to be polymorphic for markers in these genes, were monitored for growth and survival for 1 year under standard culture conditions in two French production sites. Within-family genotype frequencies indicated that the two amylase genes were closely linked (c. 1.7 cM). Within two of three families, significant differences in growth were observed between genotypes at one of the two production sites, suggesting that this polymorphism is not neutral and might be under selection because of its role in digestive function. Estimated daily yields were different between amylase genotypes,...
Tipo: Text
Palavras-chave: Growth; Genotype; Digestive enzyme; Bivalve; Alpha amylase.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1691.pdf

Requirement of n-3 long chain polyunsaturated fatty acids for European sea bass (Dicentrarchus labrax) juveniles: growth and fatty acid composition
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Skalli, Ali; Robin, Jean.
European sea bass juveniles (14.4+/-0.1 g mean weight) were fed diets containing different levels of fish oil then of n-3 highly unsaturated fatty acids (n-3 HUFA) for 12 weeks. The fish performance as well as fatty acid (FA) composition of neutral and polar lipids from whole body after 7 and 12 weeks feeding were studied. The requirements of juvenile sea bass for n-3 highly unsaturated fatty acids (n-3 HUFA) were studied by feeding fish diets containing six different levels of n-3 HUFA ranging from 0.2% to 1.9% of the diet, with approximately the same DHA/EPA ratio (1.5:1).   The growth rate at the end of the trial showed significant differences. Fish fed low dietary n-3 HUFA (0.2% DM of the diet) showed significantly lower growth than the diet 3 (0.7%),...
Tipo: Text
Palavras-chave: N 3 HUFA; Growth; Fatty acid composition; European sea bass Dicentrarchus labrax.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-501.pdf

Selection of finfish species (seabass) as candidates for aquaculture in French Polynesia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fuchs, Jacques; Gasset, Eric; Nedelec, Georges.
Species with a very high potential for aquaculture, allowing development projects on a short terms basis: the seabass originating from S.E. Asia. Species, potentially interesting but presenting some drawbacks, as difficulties to perform larval rearing or presenting pathological problem. Species considered as difficult to rear and not retained like Siganus argenteus , Siganidae or Caranx ignobilis , Carangidae. The future development of finfish in Polynesia is emphasized and a project of sea bass netcage culture in Polynesian lagoon is presented.
Tipo: Text
Palavras-chave: Siganus argenteus; Oreochromis; Coryphaenidae; Epinephelus microdon; Serranidae; Lates calcarifer; Centropomidae; Pisces; Fry; Fish larvae; Lagoons; Cage culture; Pellet feeds; Sexual reproduction; Spawning; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1474.pdf

Effects of repeated hypoxic shocks on growth and metabolism of turbot juveniles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Person, Jeannine; Lacut, Anne-sophie; Le Bayon, Nicolas; Le Roux, Annick; Pichavant, Karine; Quemener, Loic.
Turbot juveniles (45 g) were exposed for 41 d (17 C, 34parts per thousand salinity) to constant normoxic (100-100% air saturation, 100-100) or moderate hypoxic (75-75% air saturation, 75-75) conditions and to repeated hypoxic shocks (20% saturation for 1 h, 5 d per week) from normoxic (100-20% air saturation. 100-20) or moderate hypoxic (75-20% air saturation, 75-20) conditions. A normoxic group was feed restricted (100-FR). Mass increase of 100-100 and 75-75 groups fed to satiation was not significantly different. In comparison, it was significantly lower in the 100-20 and 75-20 groups (NS between the two hypoxic shocks groups). Intermediate results were obtained in the 100-100-FR group. The lowest mass increase under hypoxic shocks was explained by a...
Tipo: Text
Palavras-chave: Turbot; Metabolism; Growth; Hypoxic shock.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-571.pdf

Temporal trends in age and size at maturation of four North Sea gadid species: cod, haddock, whiting and Norway pout
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marty, Lise; Rochet, Marie-joelle; Ernande, Bruno.
Younger ages and smaller sizes at maturation have been observed in commercial fish stocks over the last century. We establish that age and length at 50% proportion mature (i.e. the proportion of mature individuals in a population or the probability that an individual is mature) decreased from the 1970s to the 2000s in North Sea cod Gadus morhua, haddock Melanogrammus aeglefinus and whiting Merlangius merlangus, but not in Norway pout Trisopterus esmarkii. The potential contributions of demography, phenotypic plasticity and evolution to these trends were assessed. First, maturation trends were extricated from demographic effects and growth-dependent plasticity by estimating probabilistic maturation reaction norms (PMRNs). PMRN midpoints have significantly...
Tipo: Text
Palavras-chave: Probabilistic maturation reaction norm; Demography; Phenotypic plasticity; Fisheries-induced evolution; Life-history strategy; Maturity; Growth; Reproductive investment.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00180/29152/27559.pdf

Growth and survival rates of bearded horse mussel (Modiolus barbatus Linne, 1758) in Mersin Bay (Turkey)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lok, A; Acarli, S.; Serdar, S; Kose, A; Goulletquer, Philippe.
The growth and survival rates of four size classes (10, 15, 20, and 25 mm) of bearded horse mussels (Modiolus barbatus) grown in net bags in Mersin Bay, Izmir, were assessed from May 2001 to May 2002. Temperature ranged 14-23 degrees C, average chlorophyll a was 3.34 +/- 0.35 mu g/l, average total particulate matter 12.43 +/- 0.68 mg/l, and average particulate organic carbon 210.23 +/- 18.00 mu g/l. Shell lengths increased 23.05, 19.76, 19.40, and 12.09 mm in the four classes (from small to large) and live weights increased 13.21, 10.46, 10.06, and 4.96 g, respectively. Survival rates ranged from 25% in the smallest size class to 87.5% in the 20 mm class (p &lt; 0.05). Mussels grew significantly fastest in the smallest size class (p &lt; 0.05).
Tipo: Text
Palavras-chave: Turkey; Survival; Modiolus barbatus; Growth; Bearded horse mussel.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2143.pdf

Length - Weight relationship and condition factor of Phycis phycis (Linnaeus, 1766) and Phycis blennoides (Brünnich, 1768) [Actinopterygii, Gadiform, Phycidae] in the Gulf of Tunis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Romdhani, Ahlem; Ktari, M.h.; Mahe, Kelig.
In our study length-weight relationship are presented for 213 Phycis phycis and 270 Phycis blennoides caught between September 2007 and August 2008 and collected from trawler fishing in the Gulf of Tunis. The length-weight relationships and the condition factor were computed separately for sexes and for different seasons. The parameters of the length-weight relationship for the population as a whole are all well correlated (r²&gt; 0.92, p &lt;0.001). The type of growth is isometric for P. phycis while it is majorant allometry for P. blennoides The comparison of the regression of the weight according to the total length of males and females, of the two species, shows that the growth is therefore identical. The study of seasonal Variations indicates that the...
Tipo: Text
Palavras-chave: Phycis phycis; Phycis blennoides; Length- weight; Growth; Condition factor; Relation taille-poids; Croissance; Facteur de condition.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00280/39154/37717.pdf

A Dynamic Energy Budget (DEB) growth model for Pacific oyster larvae, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rico-villa, Benjamin; Bernard, Ismael; Robert, Rene; Pouvreau, Stephane.
Tipo: Text
Palavras-chave: Dynamic Energy Budget; Crassostrea gigas; Bivalve larvae; Ecophysiology; Growth.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00009/11996/9040.pdf

Ecophysiological deterministic model for Crassostrea gigas in an estuarine environment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barille, Laurent; Heral, Maurice; Barilleboyer, Al.
An ecophysiological deterministic model of growth, reproduction and interactions between the bivalve and its estuarine environ ment was established for the Japanese oyster Crassostrea gigas. The environmental variables used in the model are: total particulate matter, particulate organic matter, particulate inorganic matter, chlorophyll, phaeopigments, proteins, lipids and carbohydrates. Rates of clearance, filtration, ingestion, absorption and respiration along with efficiencies of retention, selection and absorption are modelled with endogenous (dry weight of the animal, energy allocation between growth and reproduction) and exogenous variables (temperature, food quality and quantity). The model simulate the temporal evolution of two compartments: somatic...
Tipo: Text
Palavras-chave: Crassoslrea gigas; Croissance; Écophysiologie; Modélisation; Turbidité; Crassostrea gigas; Ecophysiology; Growth; Modelling; Turbidity.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00038/14892/12219.pdf

Notes on the biology of the bigeye scad, Selar crumenophthalmus (Carangidae) around Reunion Island, southwest Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roos, David; Roux, Olivier; Conand, François.
The main characteristics of the biology of bigeye scad were studied from commercial fishery catches around Reunion Island. Biometric relationships were calculated. The monitoring of size distribution, aggregated by month, allowed us to estimate the theoretical growth equation using the ELEFAN software. The von Bertalanffy growth parameters were adjusted with a seasonal modulation: L8 = 265 mm; K = 1.64 year-1; c = 0.068; ? = 0.38. The growth of the cohort was quite high during the austral summer (November-April) and decreased during the austral winter (May-October). The arrival of a new cohort with homogeneous small sizes (65 to 90 mm) in the fishery in November coincided with the disappearance of large individuals. A feature of the reproductive biology...
Tipo: Text
Palavras-chave: Indian Ocean; Reunion Island; Growth; Reproduction; Selar crumenophthalmus; Carangidae.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2335.pdf

ReMoNor : Résultats 2000
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cornette, Florence; Blin, J.l.; Pacary, S; Pien, S; Le Gagneur, Eric; Kopp, Joel; Richard, O.
At the end of its third year, the regional network for monitoring REMONOR, confirms the particularities of oyster from Normandy in matter of growth and quality. Results from 2 000 are globally very close of those from 1998. Mortality of adults reached 14% and juvenile 6% which represent a low death rate. For this year the most blow area is the Baie des Veys with 31% death rate at Géfosse. Observed growth this year had been weaker than the past two years despite the spring and automnal growth. At spring, the higher recorded growth rate on the West coast with 0.42% (regional average : 0.29%). This seasonal trend seems more and more obvious every year. Regarding the classification of the special oysters, despite the change of the standard, the Baie des Veys...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-2251.pdf

Lethal and sub-lethal effects of Deepwater Horizon slick oil and dispersant on oyster (Crassostrea virginica) larvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vignier, J.; Soudant, P.; Chu, F. L. E.; Morris, J. M.; Carney, M. W.; Lay, C. R.; Krasnec, M. O.; Robert, Rene; Volety, A. K.
In April 2010, crude oil was spilled from the Deepwater Horizon (DWH) oil platform for 87 days, coincident with the spawning season and recruitment of the oyster, Crassostrea virginica, in the Gulf of Mexico. Impacts of acute exposures to surface-collected DWH oil (HEWAF), dispersed oil (CEWAF) and dispersant alone (Corexit 9500A®) on planktonic larval stages of C. virginica (veliger, umbo and pediveliger) were tested in the laboratory. Exposures to HEWAF, CEWAF and dispersant were toxic to larvae impairing growth, settlement success and ultimately survival. Larval growth and settlement were reduced at concentrations of tPAH50 ranging from 1.7 to 106 μg L−1 for HEWAF and 1.1–35 μg L−1 for CEWAF, concentrations well within the range of water sampled during...
Tipo: Text
Palavras-chave: Deepwater Horizon oil spill; Crassostrea virginica; Corexit 9500A (R); Larvae; Growth; Settlement; PAH.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00345/45572/45181.pdf

Evaluation du probiotique bactérien Pediococcus acidilactici MA18/5M chez la crevette pénéide Litopenaeus stylirostris en Nouvelle- Calédonie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Castex, Mathieu.
P. acidilactici MA 18/5M is a dietary probiotic (BACTOCELL®) which has shown its efficiency on several terrestrial and aquatic species. The present thesis aimed to investigate more fully the effects of this probiotic on cultured penaeid shrimps. For this study, we chose a global approach by replacing the problem studied in a model of interactions between three compartments: the shrimp, its intestinal microflora and the probiotic. Having first defined how the probiotic should be administrated, we studied its effects under controlled laboratory conditions at several levels of Litopenaeus stylirostris biology: (i) Nutritional status and growth, (ii) associated bacterial microflora, and (iii) health status with respect to oxidative stress. Then the probiotic...
Tipo: Text
Palavras-chave: Floating cages; Vibriosis; Oxidative stress; Intestinal microflora; Nutrition; Growth; Shrimp; Pediococcus acidilactici; Probiotic; Cages flottantes; Vibriose; Stress oxydant; Microflore intestinale; Nutrition; Croissance; Crevette; Pediococcus acidilactici; Probiotique.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-6814.pdf

Intensive rearing of juvenile oysters Crassostrea gigas in an upwelling system : optimization of biological production
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric; Baud, Jean-pierre.
Seasonal growth of juvenile oysters (Crassostrea gigas) kept in an intensive upwelling system was studied from 1984 to 1986 in 60 to 90-day growth experiments. Saline ground water was used to produce Skeletonema costatum which was injected as food into the water supplying the upwelling system. Oyster density, water flow, phytoplankton concentration, temperature and frequency of food addition were controlled. Oyster growth was analysed with multidimensional contingency tables and correspondence analysis. The factors, in order of decreasing influence on growth, were temperature, food concentration and oyster density. A rearing strategy was deduced from the growth analysis for summer and winter. In summer, the density of  120,000 oysters/m2, the flow rate of...
Tipo: Text
Palavras-chave: Nursery; Growth; Correspondence analysis; Multidimensional contingency table analysis; Economic efficiency; Skeletonema costatum; Crassotrea gigas; Nourriture; Croissance; Analyse des correspondances; Table de contingence multidimensionnelle; Rentabilité économique; Skeletonema costatum; Crassostrea gigas.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/publication-3061.pdf

Evaluation of different tags on survival, growth and stress response in the flatfish Senegalese sole
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carballo, Carlos; Berbel, Concha; Guerrero-cozar, Israel; Jimenez-fernandez, Eduardo; Cousin, Xavier; Begout, Marie-laure; Manchado, Manuel.
Internal electronic tagging is a major issue in flatfish species due to the small size of abdominal cavity. In this study, three tag types, referred to as Nonatec, nano and mini, were evaluated in three weight classes of Senegalese sole: small (0.3 g), middle (0.8 g) and large (2.0 g). Tags were injected from the blind side and fish were carefully handled to minimize sharp movements. Tag losses were 8% in the small size class, between 5.2 and 15.1% in the middle size class and 2–4% in the large size class. The mortality rates ranged between 2.0 and 15.0% with the lowest values in the large size class. No negative effects of tags on growth (tagged vs non-tagged fish using a middle size class) were found after 57 days of culture. Four additional trials using...
Tipo: Text
Palavras-chave: Flatfish; PIT-tags; Loss rates; Sex effect; Growth.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00439/55090/56532.pdf

Evaluation des Risques dus a l'emploi des Peintures Anti-Salissures Dansales Zones Conchylicoles.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alzieu, Claude; Thibaud, Yves; Heral, Maurice; Boutier, Bernard.
The boats cruising in the oyster growing areas are protected against biofouling by paints which release toxic compounds such as copper oxide and organotins into the water. After an estimation of the inputs of copper and organotins in the "Marennes-Oleron", Arcachon (Atlantic)    and Thau (Mediterranean Sea) areas, their influence on larval fixation is discussed, taking into account the tributyltin toxicity against D larvae of Crassostrea gigas. Laboratory experiments have demonstrated that tributyltin produces morphological abnormalities of the shell and increases tin levels in tissues, interfering with copper and zinc metabolism. The influence of yacht ports on oyster growth and shell morphology, has been demonstrated in the field. The use of...
Tipo: Text
Palavras-chave: Crassostrea gigas; Oyster culture; Abnormalities; Shells; Growth; Paints; Antifouling substances; Pollution effects.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1905.pdf

Biological and economic factors in the selection of cultured fish species and the development of a bio-economic model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wu, R.
The selection of candidate species for mariculture is determined by a number of biological factors, e.g. foraging efficiency, growth efficiency, mortality, grow-out period and susceptibility to environmental fluctuations, disease and crowding, as well as economic factors e.g. the supply and price of fry, grow-out cost and price of adult. A computer model incorporating these major factors is being developed, to determine and compare the potential of different culture species.
Tipo: Text
Palavras-chave: Lates calcarifer; Epinephelus tauvina; Mylio macrocephalus; Pisces; Marine fish; Tolerance; Biology; Modelling; Economic models; Diseases; Mortality; Growth; Cultured organisms.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1488.pdf

Changements adaptatifs induits par la pêche chez les populations halieutiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marty, Lise.
Fishing is an important source of mortality in harvested populations and therefore may induce adaptive responses. These responses affect life-history traits in particular, which have consequences for stocks’ dynamics, and thus can alter the demographic direct effect of fishing (i.e. the reduction in stock’s biomass). Fishing-induced adaptive changes depend, non-exclusively, on two processes: evolution and phenotypic plasticity. These two components are observed at the phenotypic level because functional genes coding for the traits undergoing adaptive changes have not yet been identified. These two origins are confounded in individual phenotypes, and the impact of adaptive changes in the long run remains therefore unclear: evolutionary changes are expected...
Tipo: Text
Palavras-chave: : Pêche; Évolution adaptative; Plasticité phénotypique; Norme de réaction; Dérive génétique; Érosion génétique; Age et taille à maturation; Croissance; Survie; Trade-offs; Densité-dépendance; Gadidées de mer du nord; Fishing; Adaptive evolution; Phenotypic plasticity; Reaction norm; Genetic drift; Genetic erosion; Age and size at maturation; Growth; Survival; Trade-offs; Density-dependence; North sea Gadoids.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00079/19013/16591.pdf

Réseau de suivi de la croissance de l'huître creuse sur les côtes françaises (REMORA) , résultats des stations de BRETAGNE (Année 1998)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Claude, Serge; Langlade, Aime; Le Coguic, Yvette.
The network IFREMER/ REMORA watches every year, from February to December, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year class ; and "adults" = two-years class), distributed among various stations of the main French oyster areas. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be regarded as an accurate estimation of professional oyster ongrowings. With regard to REMORA results, generally tallied with professional observations, 1998 on the whole was a second year of low mortality. But some areas remained affected by significant mortalities such as Pen-Bé in South Brittany. The year 1998 was overall a very poor year for growth : the mean oyster weight in...
Tipo: Text
Palavras-chave: REMORA; Bretagne; Huître creuse; Mortalité; Croissance; Qualité commerciale; Polydora; REMORA; Brittany; Gigas oyster; Mortality; Growth; Commercial quality; Polydora.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00113/22387/20082.pdf

Domestication, sélection et comportement du bar: variabilité des aptitudes comportementales et de la tolérance au stress de groupes génétiquement distincts de bar, Dicentrarchus labrax
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Millot, Sandie.
The culture of aquatic species has grown much more rapidly in recent years than that of terrestrial species. Consequently, aquatic livestock welfare is a growing concern for society. However, unlike the many studies of terrestrial animal welfare, few scientific data exist concerning fish welfare. It is generally recognized that the aquaculture environment exposes fish to many repeated stress factors which affect their health, growth, reproductive performance and feeding behaviour. Even if stress responses do not highlight all welfare disturbances, it is generally admitted that they reveal a poor welfare. Among the solutions investigated to reduce fish stress, domestication and selection appear to be the favoured approaches. However, selection has generally...
Tipo: Text
Palavras-chave: Personality; Physiological status; Growth; Swimming behaviour; Feeding behaviour; Stress tolerance; Adaptation; Welfare; Chronic stress; Acute stress; Selection; Domestication; Dicentrarchus labrax; Personnalité; Statut physiologique; Croissance; Comportement natatoire; Comportement alimentaire; Tolérance au stress; Adaptation; Bien être; Stress chronique; Stress aigu; Sélection; Domestication; Dicentrarchus labrax.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-6272.pdf

Toxicity and Growth Assessments of Three Thermophilic Benthic Dinoflagellates (Ostreopsis cf. ovata, Prorocentrum lima and Coolia monotis) Developing in the Southern Mediterranean Basin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ben-gharbia, Hela; Yahia, Ons Kefi-daly; Amzil, Zouher; Chomerat, Nicolas; Abadie, Eric; Masseret, Estelle; Sibat, Manoella; Triki, Habiba Zmerli; Nouri, Habiba; Laabir, Mohamed.
armful benthic dinoflagellates, usually developing in tropical areas, are expanding to temperate ecosystems facing water warming. Reports on harmful benthic species are particularly scarce in the Southern Mediterranean Sea. For the first time, three thermophilic benthic dinoflagellates (Ostreopsis cf. ovata, Prorocentrum lima and Coolia monotis) were isolated from Bizerte Bay (Tunisia, Mediterranean) and monoclonal cultures established. The ribotyping confirmed the morphological identification of the three species. Maximum growth rates were 0.59 ± 0.08 d−1 for O. cf. ovata, 0.35 ± 0.01 d−1 for C. monotis and 0.33 ± 0.04 d−1 for P. lima. Toxin analyses revealed the presence of ovatoxin-a and ovatoxin-b in O. cf. ovata cells. Okadaic acid and...
Tipo: Text
Palavras-chave: Ostreopsis cf. ovata; Prorocentrum lima; Coolia monotis; Southern Mediterranean Sea; Growth; Toxicity.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00355/46585/46393.pdf

Summer mortality of hatchery-produced Pacific oyster spat (Crassostrea gigas). I. Estimation of genetic parameters for survival and growth
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Degremont, Lionel; Ernande, Bruno; Bedier, Edouard; Boudry, Pierre.
The multidisciplinary project "MOREST" aims to improve our understanding of causes of summer mortality in Crassostrea gigas juveniles in France and to reduce its impact on oyster production. As pail of the MOREST project, 43 full-sib families nested within 17 half-sib families were produced, planted out and tested in 3 sites during summer 2001 to assess to what extent genetic variability exists for this trait. A strong genetic basis was found for survival as narrow-sense heritability estimates ranged from 0.47 to 1.08, with higher values in sites where summer mortality was higher. Genetic correlations across sites were positive and very high for survival, indicating no genotype by environment interaction. In contrast, lower genetic variation was observed...
Tipo: Text
Palavras-chave: Growth; Survival; Juveniles; Heritability; Crassostrea gigas.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2457.pdf

Establishment and population features of the non-native Atlantic rangia, Rangia cuneata (Mollusca: Bivalvia), in northwestern France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faillettaz, Robin; Roger, Christophe; Mathieu, Michel; Robin, Jean-paul; Costil, Katherine.
The presence of shells of the Atlantic rangia, Rangia cuneata, a brackish-water species native from the Gulf of Mexico also known as gulf wedge clam, was reported in 2017 on the French coasts of the English Channel, in the waterway that connects Caen to the sea. However, no information was available on whether a population of this alien species had successfully established in the region. Here, only empty shells—except for one live individual—were sampled in that waterway, and the sampling was shifted to the nearby marina of Ouistreham, where water is mesohaline (6.89 ± SD 0.06 PSU). In spring 2017, the mean density in the marina reached 110.45 ± 86.08 ind m-2, largely dominating the benthos community. The population was mostly composed of fairly large...
Tipo: Text
Palavras-chave: The Atlantic rangia; Alien species; Normandy (F); Brackish waters; Density; Growth; Reproduction.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00634/74623/74515.pdf

Etat des stocks conchylicoles normands en 2000
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kopp, Joel; Messiaen, Gregory; Le Gagneur, Eric; Cornette, Florence; Ropert, Michel.
Crassostrea gigas and Mytilus edulis are reared in four areas along the eastern coast of Cotentin (Normandy).  Every five years, a stock assessment survey, based on a stratified random sampling is carried out using aerial photographs. During September 2000, oysters bags and mussel banks random samplings have been weighed on leasing grounds and in random sampled farms in order to evaluate the overall total gross and net weights breeded (oysters 40 000 and mussels 17 000 metric tons, net weights). Age compositions of each stock in each rearing area have been computed.  This last stock assessment showed that cultural regulations are less and less observed in Normandy's breeding areas. A strong increase in bag densities has been noticed since 1995. As stock...
Tipo: Text
Palavras-chave: Ostréiculture; Mytiliculture; Estimation des stocks; Croissance; Rendements; Oysters culture; Mussels culture; Stock assessment; Growth; Yields.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00107/21786/19360.pdf

Effects of dissolved mercury on embryogenesis, survival, growth of Mytilus galloprovincialis mussel larvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beiras, Ricardo; His, Edouard.
The effects of Hg concentrations ranging from 0 (control) to 1024 µg 1-1 upon embryogenesis, survival and growth of Mytilus galloprovincialis mussel larvae were investigated . Embryogenesis was abnormal in 50 % of the individuals at 10µg 1-1. The 48 h LC50 for D-shaped, early umbonate, late umbonate and eyed larvae were 51, 164, 322 and 383 µg 1- 1 respectively. The LC50 was an allometric function of ash-free dry weight with exponent b = 0.60. Larval growth was significantly reduced alter 6 d exposure to 4 µg Hg 1-1 and alter 10 d exposure to 2 µg 1-1. No significant differences in lethal or sublethal sensitivity to Hg were found between M. galloprovincialis and previously studied Crassostrea gigas embryos and larvae. The implications of these findings for...
Tipo: Text
Palavras-chave: Mercury; Mytilus galloprovincialis; Mussel; Larvae; Growth; Embryonic development; Bioassay; Ecotoxicology.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00037/14868/12192.pdf

Influence of environmental parameters on Karenia selliformis toxin content in culture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Medhioub, Amel; Medhioub, Walid; Amzil, Zouher; Sibat, Manoella; Bardouil, Michele; Ben Neila, Idriss; Mezghani, Salah; Hamza, Asma; Lassus, Patrick.
Karenia selliformis strain GM94GAB was isolated in 1994 from the north of Sfax, Gabes gulf, Tunisia. This species, which produces gymnodimine (GYM) a cyclic imine, has since been responsible for chronic contamination of Tunisian clams. A study was made by culturing the microalgae oil enriched Gaillard f/2 medium. The influence of growing conditions oil toxin content was studied, examining the effects of (i) different culture Volumes (0.25 to 40 litre flasks), (ii) two temperature ranges (17-15 degrees C et 20-21 degrees C) and (iii) two salinities (36 and 44). Chemical analyses were made by mass spectrometry coupled with liquid chromatography (LC-MS/MS). Results showed that (i) the highest growth rate (0.34 +/- 0.14 div d(-1)) was obtained at 20 degrees C...
Tipo: Text
Palavras-chave: Mouse bioassay; Gymnodimine; Toxicity; Growth; Karenia selliformis.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7383.pdf

Problems related to the lack of functional swimbladder in intensive rearing of the seabass Dicentrarchus labrax and the sea bream Sparus auratus .
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chatain, Beatrice.
The primordial inflation of swimbladder normally occurs at a size of 4 to 5 mm in sea bream Sparus auratus and 5 to 6 mm in sea bass Dicentrarchus labrax . However, in intensive larval rearing conditions, lack of inflation is often observed and leads to the production of up to 80% of postlarvae whose swimbladder is not functional. They are, on the average, 20-30% smaller in weight than normal fry. Their survival rate can also be reduced by any kind of stress such as weaning, handling or hypoxic conditions. It is suggested that the selective mortality which affects the abnormal fish results both from a decrease in predatory efficiency and an increase in energetic needs.
Tipo: Text
Palavras-chave: Sparus aurata; Sparidae; Dicentrarchus labrax; Serranidae; Teleostei; Pisces; Genetic abnormalities; Hatching; Swim bladder; Growth; Larvae; Survival; Intensive culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1432.pdf

Cross breeding of different domesticated lines as a simple way for genetic improvement in small aquaculture industries: Heterosis and inbreeding effects on growth and survival rates of the Pacific blue shrimp Penaeus (Litopenaeus) stylirostris
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goyard, Emmanuel; Goarant, Cyrille; Ansquer, Dominique; Brun, Pierre; De Decker, Sophie; Dufour, Robert; Galinie, C; Peignon, Jean-marie; Pham, Dominique; Vourey, Elodie; Harache, Yves; Patrois, Jacques.
Two populations of the Latin American shrimp Penaeus (Litopenaeus)stylirostris domesticated in Hawaii and in New Caledonia were previously shown to be genetically differentiated and proven highly inbred. In New Caledonia, where different Vibriosis affect shrimp production and antibiotic use is banned in growing ponds, the Hawaiian population was introduced to increase the allelic variability available for local shrimp farmers and start a genetic improvement program. Growth and survival rates of the two pure populations and the two-way F-1-hybrids obtained by breeding Hawaiian animals with New Caledonian animals were assessed in several simple experiments (earthen ponds, floating cages and experimental infection challenges) during two years on two...
Tipo: Text
Palavras-chave: Vibriosis; Survival; Growth; Penaeus Litopenaeus stylirostris; Shrimp; Cross breeding; Genetic improvement.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4316.pdf

Modèle énergétique uniboite de la croissance des huîtres (Crassostrea gigas) dans le bassin de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric; Heral, Maurice; Deslous-paoli, Jean-marc; Razet, Daniel.
The growth of oysters (Crassostrea gigas) is modeled in order to study the trophic capacity of the Bay of Marennes Oléron. Total seston and amount of protids, lipids, and carbohydrates converted to energy are the environmental factors taken into account. Time series of these variables are derived during 2 yr with a daily time step from a linear regression including the tidal velocity, the height of the water column, and the wind velocity. A model of the energetic budget based on assimilation and respiration terms and depending on the previous time series is run to simulate the individual growth of an oyster. The knowledge of the number of oysters, the flow of water entering the bay, and the volume of the bay allows us then to estimate that 7% of the...
Tipo: Text
Palavras-chave: Marennes Oléron; Crassostrea gigas; Huîtres; Croissance; Modélisation; Marennes Oleron bay; Crassostrea gigas; Oysters; Growth; Modelisation.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-3051.pdf

Comparison of growth of mussel, Mytilus edulis, on longline, pole and bottom culture sites in the Pertuis Breton, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garen, Pierre; Robert, Stephane; Bougrier, Serge.
Growth of the mussel, Mytilus edulis, was compared for the first time under three culture regimes, longline located in open sea, pole and on-bottom both situated on an intertidal flat, in the Pertuis Breton, on the Atlantic coastline of France. Mussel sampling was performed on a monthly basis over 1 year while monitoring of hydrobiological parameters was conducted on a biweekly basis. Fluctuation of environmental parameters showed a similar pattern on both sea and shore locations with generally higher concentration levels for the intertidal area compared with the open sea, i.e. 4.07 and 3.17 mg 1(-1) for particulate organic matter, 3.16 and 2 mug 1(-1) for chlorophyll-a, 58.43 and 38.72 mg 1(-1) for inorganic-N, respectively. A clear seasonal growth...
Tipo: Text
Palavras-chave: Condition index; Emersion; Food resource; Water quality; Growth; Mytilus edulis.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-581.pdf

Tank wall colour and light level affect growth and survival of Eurasian perch larvae (Perca fluviatilis L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tamazouzt, Lakhdar; Chatain, Beatrice; Fontaine, Pascal.
The influence of interaction between light intensity and tank wall colours on survival and growth of perch larvae (Perca fluviatilis L.) was investigated for 15 days after hatching. Three light intensities (250, 400 and 800 Ix) and four wall colours (black, dark grey, light grey and white) were used. At the end of the experiment, survival rates ranged between 1% and 26%, and varied according to the different treatments (P = 0.0001; df = 11). A global effect of light intensity was detected(P = 0.0001; df = 2) and the highest survival rate was observed under 250 Ix. Survival was also influenced by the tank wall colour(P = 0.0001; df = 3): light grey showed the best result (17%). The greatest growth in weight and length was observed in tanks with light grey...
Tipo: Text
Palavras-chave: Growth; Survival; Light level; Tank colour; Larvae; Eurasian perch.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-505.pdf

An early-life hypoxia event has a long-term impact on protein digestion and growth in European sea bass juvenile.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zambonino, Jose-luis; Mazurais, David; Dubuc, Alexia; Queau, Pierre; Vanderplancke, Gwenaelle; Servili, Arianna; Cahu, Chantal; Le Bayon, Nicolas; Huelvan, Christine; Claireaux, Guy.
Ocean warming, eutrophication and consequent decrease in oxygen lead to smaller average fish size. Although such responses are well-known in an evolutionary context, involving multiple generations, it appears to be incompatible with current rapid environmental change. Rather, phenotypic plasticity could provide a means for marine fish to cope with rapid environmental changes. However, little is known about the mechanisms underlying plastic responses to environmental conditions that favour small phenotypes.  Our aim was to investigate how and why European sea bass that had experienced a short episode of moderate hypoxia during their larval stage subsequently exhibited a growth depression at the juvenile stage compared to the control group.  We examined...
Tipo: Text
Palavras-chave: Climate change; Digestive enzymes; Dicentrarchus labrax; Growth; Hypoxia; Respirometry.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00373/48407/48635.pdf

Croissance et spectre de tailles de six algues utilisees pour la nutrition de larves de bivalves en ecloserie, en culture non renouvelee
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Rene; His, Edouard.
The growth and the size-frequency distribution of six unicellular marine algae, Isochrysis aff. galbana "Tahiti" nom. prov., Pavlova lutheri (Droop) Green, Pseudoisochrysis paradoxa nom. prov., Tetraselmis tetrathele (G.S. West) Butcher, Chaetoceros calcitrans (Paulsen) Takano et Chaetoceros gracilis Schutt have been studied. Most of these species showed an increase in size during the stationary phase of growth. Because these data and anterior ones were achieved in similar experimental conditions, they were ranked by size and their growth performances discussed.
Tipo: Text
Palavras-chave: Molluscan larvae; Hatcheries; Nutrition; Growth; Algal culture.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/publication-1778.pdf

Are hake otolith macrostructures randomly deposited? Insights from an unsupervised statistical and quantitative approach applied to Mediterranean hake otoliths
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Courbin, Nicolas; Fablet, Ronan; Mellon-duval, Capucine; De Pontual, Helene.
Individual fish age data are crucial to fish stock assessment, so their accuracy and precision are vital. The acquisition of age data most often relies on interpreting fish otoliths, a complex task in which expert subjectivity increases with the complexity of the structural patterns of the otoliths. The question arises for certain fish species (e.g. hake, Merluccius merluccius) whether the deposition of otolith macrostructures is meaningful for age estimation. A quantitative method based on the evaluation of otolith similarity in terms of structural patterns is presented to investigate this issue. It relies on the determination of a typology of otolith macrostructures from an unsupervised statistical analysis of the distributions of their characteristics....
Tipo: Text
Palavras-chave: Quality control; Otolith; Merluccius merluccius; Growth; Age estimation method; Age.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2678.pdf

Effect of nutrition on Crassostrea gigas larval development and the evolution of physiological indices. Part A: Quantitative and qualitative diet effects
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ben Kheder, Rym; Quere, Claudie; Moal, Jeanne; Robert, Rene.
Tipo: Text
Palavras-chave: Crassostrea gigas; Larvae; Growth; Metamorphosis; Nutrition level and quality; Lipids; Condition indices.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00009/11997/9041.pdf

Effects of nutritional requirement of live food organisms on growth and survival of barramundi/seabass Lates calcarifer (Bloch) larvae.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rimmer, M; Reed, A.
Larvae of barramundi (Lates calcarifer ) reared intensively in some Australian hatcheries have suffered periodic high mortalities which have been ascribed to nutritional deficiencies in the live food organisms used, particularly deficiencies of polyunsaturated fatty acids. Barramundi larvae reared in an experimental system and fed on four diets, representing combinations of supplemented and unsupplemented rotifers (Brachionus plicatilis ) and supplemented and unsupplemented brine shrimp (Artemia salina ). Supplementation of rotifers and brine shrimp with a commercially available microencapsulated diet increased the levels of several polyunsaturated fatty acids in the food organisms.
Tipo: Text
Palavras-chave: Lates calcarifer; Brine shrimp culture; Growth; Intensive culture; Fatty acids; Feeding; Mortality; Hatcheries; Rearing; Food organisms; Nutritional requirements; Diets; Larvae; Survival.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1421.pdf

A polygenic hypothesis for sex determination in the European sea bass - Dicentrarchus labrax
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandeputte, Marc; Dupont Nivet, M; Chavanne, H; Chatain, Beatrice.
Polygenic sex determination, although suspected in several species, is thought to be evolutionarily unstable and has been proven in very few cases. In the European sea bass, temperature is known to influence the sex ratio. We set up a factorial mating, producing 5.893 individuals from 253 full-sib families, all reared in a single batch to avoid any between-families environmental effects. The proportion of females in the offspring was 18.3%, with a large variation between families. Interpreting sex as a threshold trait, the heritability estimate was 0.62 +/- 0.12. The observed distribution of family sex ratios was in accordance with a polygenic model or with a four-sex-factors system with environmental variance and could not be explained by any genetic...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Fish; Growth; Heritability; Sex ratio.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3526.pdf

Growth of the black-lip pearl oyster, Pinctada margaritifera, at nine culture sites of French Polynesia: synthesis of several sampling designs conducted between 1994 and 1999
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pouvreau, Stephane; Prasil, Vincent.
Between 1994 and 1999, several sampling designs were used to measure the growth of the black-lip pearl oyster, Pinctada margaritifera var. cumingi at different sites in French Polynesia. Using a common statistical method, growth data were analysed for nine sites and showed significant geographic variability. Parameters of the Von Bertalanffy model, fitted on the nine data sets, ranged from 147 to 186.5 mm for the H-infinity parameter and from 0.42 to 0.58 year(-1) for the k parameter. The phi parameter (combination of H-infinity and k) provided a ranking classification of growth in these nine sites: growth was low in closed atoll lagoons, such as Takapoto, whereas the island lagoons and ocean habitat supported a very promising shell growth. Calculated on...
Tipo: Text
Palavras-chave: Von Bertalanffy model; Tropical lagoon; Pinctada margaritifera; Pearl oyster; Growth; Modèle de Von Bertalanffy; Lagon tropical; Pinctada margaritifera; Huître perlière; Croissance.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-549.pdf

Affinage des huîtres creuses Crassostrea gigas en claires ostréicoles du Bassin de Marennes-Oléron : Etude des modifications de la Norme AFNOR-NF V 45 056
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Stephane; Goulletquer, Philippe; Soletchnik, Patrick; Geairon, Philippe; Le Moine, Olivier; Razet, Daniel; Faury, Nicole; Taillade, Sylvie.
Within its oyster quality project, the Marennes-Oleron Professional Organization (SRC) aims to improve the zootechnic rearing conditions in ponds for the Pacific cupped oyster C. gigas "fines de claires" and "speciales de claires", presently specified by the French norm AFNOR NF V45-056 (AFNOR, 1985). The proposed modifications concern a seasonal management of the oyster biomass per m2 , using 1 and 3kg/m2, during 2 weeks from April 1rst to October 31, and 3 weeks from November 1 to March 31, respectively. The Shellfish Aquaculture Laboratory of Poitou-Charentes (LCPC) carried out experiments to address the professional and decision-makers request for an assessment of those modifications on the final oyster quality compared to the current rearing...
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea gigas; Affinage; Claires ostréicoles; AFNOR NF V 45-056; Pacific Cupped oyster; Crassostrea gigas; Growth; Oyster ponds; AFNOR NF V 45-056.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00102/21325/18948.pdf

Marine diatoms sustain growth of bivalves in a Mediterranean lagoon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pernet, Fabrice; Malet, Nathalie; Pastoureaud, Annie; Vaquer, Andre; Quere, Claudie; Dubroca, Laurent.
Carbon stable isotopes and fatty acids were measured in the suspended particulate organic matter (POM) of the Thau lagoon to study its qualitative temporal changes in relation to environmental factors and to identify the food sources of bivalves over a one-yr-cycle in relation to their growth. Reciprocally, the impact of shellfish farming on POM was also studied. Oysters and mussels were sampled and measured for biometry, stable isotopes and fatty acid composition. Water samples were collected at two sites, both inside and outside of the shellfish farming area, to determine concentrations in POM, chlorophyll a (Chl a) and stable isotopes. Carbon isotopes and fatty acids in bivalves reflected seasonal changes in food sources, which varied consistently with...
Tipo: Text
Palavras-chave: Aquaculture; Bivalve; Competition; Feeding ecology; Growth; Trophic markers.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00075/18575/16177.pdf

SYstème de BIOmétrie Larvaire de bivalves par analyse d'images
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Pontual, Helene.
SYBIOL, SYstem of BIOmetry of Larvae by image analysis, has been designed for measuring larvae of bivalves in a semi automatic way. The main interest of this tool is to provide more information with the extraction of parameters such as area or equivalent diameter. Our purposes are to describe and evaluate the system which is now operational and used in routine in the mollusc hatchery of Argenton.
Tipo: Text
Palavras-chave: Croissance; Elevages larvaires; Mollusques; Analyse d'images; Growth; Larval rearing; Molluscs; Image analysis.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00451/56302/57890.pdf

NMR relaxometry as a potential non-invasive routine sensor for characterization of phenotype in Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Davenel, Armel; Pouvreau, Stephane; Cambert, Mireille; Suquet, Marc; Mariette, Francois.
MR imaging is the most appropriate non-invasive technique for quantifying the growth of somatic and gonad tissues and to determine sex in the Pacific oyster, Crassostrea gigas. However, this technique is too costly for field studies where oysters are used as bioindicators of environmental quality or to be applied routinely in hatcheries. We have tested the ability of low Nuclear Magnetic Resonance relaxometry, a much less expensive technique, to obtain phenotype parameters that can be used to monitor the physiological state of oysters. NMR measurements were carried out at three different periods using a low field spectrometer equipped with a 50 mm diameter probe to investigate 60 oysters in their first year of maturity, which were then dissected to measure...
Tipo: Text
Palavras-chave: Sex identification; Growth; NMR; Crassostrea gigas; Phenotype characterization.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6456.pdf

REMORA. Bilan national de la croissance de l'huître creuse de 1993 à 1995
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goyard, Emmanuel.
What is REMORA? REMORA &amp;#8722;REseau MOllusques du département Ressources Aquacoles&amp;#8722; (Aquaculture Resources Department Mollusc Network) is a surveillance network dedicated to the growth of hollow oysters Crassostrea gigas. In the past and in most production areas, observations were made on a regular basis. In 1993, homogenising experimental protocols between the different laboratories involved was decided, as well as using a common initial oyster batch, therefore organizing a network covering all of the French coasts.This network aims at providing, each year, the production's basic characteristics found in main oyster beds (growth reference). It also better characterizes variations and shows potential tendencies.
Tipo: Text
Palavras-chave: Crassostrea gigas; Growth; Network of monitoring; Oyster culture.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/rapport-1756.pdf

Alimentation et croissance de bivalves filtreurs en bassin aménagé
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Riva, A.; Lelong, P.
The lagoon of Brusc located on the Mediterranean coast (Var­France) is subjected to climatic and hydrologic particular condi­tions. The low values observed for nutrient into the sea water affect the evolution of phytoplankton. Thus chlorophyll concen­tration measured in the lagoon give an annual average of 0.42 mg. m-3 . The growth of two bivalves species : Cerastoderma glaucum and Venerupis semidecussata was compared between two stations where one population of each species are implanted. The culture of this molluscs is made in the lagoon and in outdoor pound dug on the old salt-pan near at hand. In the pound, subjected to natural climatic conditions, a great growth is noted for this two species. The growth rate appear better than the populations of the...
Tipo: Text
Palavras-chave: Lagune méditerranéenne; Production primaire; Bivalves; Croissance; Mediterranean Lagoon; Primary production; Bivalves; Growth.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00306/41674/40883.pdf

Exploitation, biologie et dynamique du stock de langouste rouge de Corse, Palinurus elephas Fabricius
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marin, Jean.
The European red spiny lobster (Palinurus elephas) is the main target species of the small-scale fishery in Corsica. This fishery was described, its trends from 1981 to 1964 were analysed, and the exploitation conditions of the spiny lobster stock (fishing grounds, strategy and gear ; fishing regulations) were explained. Furthermore, the fishing effort and the yields were estimated through an indirect survey, in 1983 and 1984 . The growth was studied through tagging experiments. Growth increment per moult, Von BERTALANFFY's equation parameters, and moulting frequency were estimated for both sexes. Bias risks associated to tag loss at moulting were also analysed. In addition, estimates of K and L&amp;#8734; variances were provided through "Jack-knife"...
Tipo: Text
Palavras-chave: Palinurus elephas; Fishery biology; Population dynamics; Fecundity; Recruitment; Sexual maturity; Growth; Stock assessment; Sensibilité; Fécondité par recrue; Rendement par recrue; Analyse des cohortes; Maturité sexuelle; Croissance; Pêcherie; Langouste.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/these-1036.pdf

Status and potential of Australian Lates calcarifer culture.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mackinnon, M.
Lates calcarifer is distributed widely in northern Australia and is important to both commercial and recreational fisheries. There is the research on hatchery production of the species in 1984 and this work is continuing. Hatchery reared fish have been stocked to reservoirs in northern Queensland and have been used in experimental grow-out trials. Fish weaned onto formulated diets by the age of 25 days were reared to marketable size (&gt; 500 g) in freshwater tanks. Despite suboptimal water temperatures the fish reached market size by the age of twelve months. Taste panel analysis showed that the pellet fed fish were of good quality. The sensitivity of growth rates to water temperature was demonstrated in both grow-out trials and reservoir stockings.
Tipo: Text
Palavras-chave: Lates calcarifer; Pisces; Fresh water; Fingerlings; Hatcheries; Cage culture; Water temperature; Food conversion; Pellet feeds; Culture tanks; Diets; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1429.pdf

Ecologie du système hôte - parasite, juvéniles G0 de sole (Solea solea) - métacercaires de Digènes : dynamique et effets de l'infestation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Durieux, Eric.
Coastal areas, such as shallow water bays and estuaries, serve as nurseries for juveniles of many marine fishes and especially flatfishes. Parasites play an important role in these marine ecosystems, but it remains poorly studied. Little attention has been paid to parasitism as a potential factor of variation in flatfish juveniles biological performances in these habitats. Sole juveniles, Solea solea (Pleuronectiformes, Soleidae), that is a species of primary importance for fisheries, are infected by digenean metacercariae. Thus, the aims of this PhD thesis were: i) to determine the spatio-temporal dynamics of the digenean metacercariae infection of 0-group sole juveniles at different scales; ii) to estimate the effects of this infection at different...
Tipo: Text
Palavras-chave: North East Atlantic; Mussel farming; Biological tags; Behaviour; Condition indices; Growth; Immunity; Parasitism; Flatfish; Nurseries; Atlantique Nord Est; Mytiliculture; Marqueurs biologiques; Comportement; Indices de condition; Croissance; Immunité; Parasitisme; Pleuronectiformes; Nourriceries.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-2933.pdf

REseau MOllusques des Rendements Aquacoles de l'huître creuse Crassostrea gigas sur les côtes françaises (REMORA). Résultats de la lagune de Thau pour l'année 2003.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Gall, Patrik; Lagarde, Franck; Pichot, Yves; Vercelli, Catherine.
The monitoring network IFREMER/REMORA in Thau lagoon is assessing, on a yearly basis, mortality, growth and quality criteria distributed among 6 stations. Samplings are carried out in March, June, September and December. 2003 is a year with a very important mortality in Mèze and Marseillan area due to an anoxy and an anormal mortality at Bouzigues Nord in december. The growth rate is always better than others French oysters areas. Afnor index is high (beetwen 13.7 and 16.5 in december), so the totality of the oysters are classifed in "Spéciales". Polydora sp. Index is important but the initial stock was first infected. The valve quality is good, with no gelatine, except on Bouzigues South.
Tipo: Text
Palavras-chave: REMORA; France; Lagune de Thau; Huître creuse; Crassostrea gigas; Mortalité; Croissance; Qualité; Polydora; REMORA; France; Thau lagoon; Cupped oyster; Crassostrea gigas; Mortality; Growth; Quality; Polydora.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00113/22384/20079.pdf

Modélisation biophysique pour la prévision du recrutement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Allain, Gwenhael.
Exploited fish populations are dependent on recruitment (i.e. size of the new year class) to sustain their abundance. Recruitment variations are related to hydroclimatic variations and may accentuate the detrimental effects of fishing. Recruitment prediction requires accurate fisheries oceanographic tools, which are expected to be more reliable than large-scale correlation analyses between fish abundance and climate variables.  Recruitment is the result of the integration over a season and large oceanic areas of processes affecting larval survival, which are dependent on small-scale mechanisms. Hydrodynamic models are a tool to perform this integration. This thesis aims at exploring and modelling physical-biological interaction mechanisms in order to...
Tipo: Text
Palavras-chave: Anchovy; Upwelling; Turbulence; Retention; Fisheries management; Population dynamics; Stock environment interaction; Stock recruitment relation; Scale integration; Individual based models; Survival; Growth; Otolith; Physical biological interactions; Prediction; Recruitment; Turbulence; Rétention; Méso échelle; Intégration des échelles; Modèle de survie; Modèle de ponte; Modèles individu centrés; Modèles de corrélation; Modèles stochastiques; Juvéniles; Larves; Otolithe; Modèle de croissance; Interactions physique biologie; Prévision; Recrutement.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/these-5.pdf

Response to divergent selection for resistance to summer mortality in Pacific oyster spat : genetic parameters and correlated responses with subsequent survival and growth
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boudry, Pierre; Bedier, Edouard; Ernande, Bruno; Degremont, Lionel.
The multidisciplinary program "MOREST" aims to improve our understanding of causes of summer mortality in Crassostrea gigas juveniles in France and to reduce its impact on oyster production. As part of this program, four successive generations of families were bred between 2001 and 2005 in our research hatchery in La Tremblade. Survival and growth were recorded in the field in three sites along the French coast (Ronce, Rivière d'Auray and Baie des Veys). The first generation (44 full-sib families nested within 17 half-sib families) was tested during summer 2001 to assess to what extent genetic variability exists for spat survival.  An important genetic basis was found (estimated narrow-sense heritability among sites = 0.83 ± 0.40). In contrast, lower...
Tipo: Text
Palavras-chave: Survival; Growth; Genetic parameters; Summer mortality; Selection; Genetic; Crassostrea gigas; Pacific oysters.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3458.pdf

Comparison of rearing performances and intermuscular bone number in the mirror and nude genotypes of common carp (Cyprinus carpio L.) in a controlled field test in Madagascar
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Andria-mananjara, Diana Edithe; Rasamoelina, Harena; Vandeputte, Marc.
Nude carps, a genotype of common carp which are devoid of scales, have been banned from farmed populations of carp in Europe due to both the lethal effect of the N (nude) gene when in homozygous state, and to the negative pleiotropic effects on growth and survival (especially in harsh conditions) of this same gene in the heterozygous state, which produces the nude phenotype. In Madagascar, where climatic variations are less extreme than in Eastern Europe, the nude phenotype is valued both by farmers and consumers, for its good growth and supposed low number of intermuscular bones. We performed an on-farm experiment using a “common garden” design to control environmental variation, in order to compare the growth and survival, as well as the number of...
Tipo: Text
Palavras-chave: Nude carp; Growth; Survival; Pleiotropy; Intermuscular bonesa.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00308/41952/41214.pdf

Starting with a handicap: phenotypic differences between early- and late-born king penguin chicks and their survival correlates
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stier, Antoine; Viblanc, Vincent A.; Massemin-challet, Sylvie; Handrich, Yves; Zahn, Sandrine; Rojas, Emilio R.; Saraux, Claire; Le Vaillant, Maryline; Prud'Homme, Onesime; Grosbellet, Edith; Robin, Jean-patrice; Bize, Pierre; Criscuolo, Francois.
1.  The exceptionally long (c. 11 months) growth period of king penguin chicks (Aptenodytes patagonicus) is interrupted by the Austral winter. As a consequence, penguin chicks born late in the breeding season have little time to build-up their energy reserves before the drastic energy bottleneck they experience during winter and face greater risks of mortality than early-born chicks.  2.  Whereas it is well known that breeding adults alternate between early- and late-breeding attempts, little is known on the phenotype of early- and late-chicks, and on the potential existence of specific adaptive phenotypic responses in late-born individuals.  3.  We investigated phenotypic differences between early- and late-chicks and tested their survival correlates both...
Tipo: Text
Palavras-chave: Early-life conditions; Phenotypic plasticity; Oxidative stress; Individual quality; Growth; Telomere; Corticosterone; Reproductive timing.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00170/28175/32107.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; Résultats des stations nationales. Année 1998
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Ruelle, Francois; Claude, Serge; Palvadeau, Hubert; Robert, Stephane; Vercelli, Catherine; Chabirand, Jean-michel; D'Amico, Florence.
The monitoring network IFREMER /REMORA is assessing on a yearly basis, from February to December, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year class ; and "adults" = two-years class), deployed among various stations of the main French oyster areas. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be considered as an accurate estimation of professional oyster ongrowings. Based on REMORA results, generally tallied with professional observations, 1998 on the whole was a second year of low mortality. However several areas remained affected by significant mortalities : the baie des Veys (in Normandy), Morlaix and Pen-Bé (in Brittany) and Marennes (in...
Tipo: Text
Palavras-chave: Polydora; Commercial quality; Growth; Mortality; Crassostrea gigas; Pacific cupped oyster; France; REMORA; Polydora; Qualité commerciale; Croissance; Mortalité; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-1638.pdf

Age, growth and mortality of the starry weever Trachinus radiatus Cuvier, 1829 in the Tunisian waters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hamed, Oussama; Dufour, Jean-louis; Chakroun-marzouk, Nadia; Mahe, Kelig.
Age, growth and mortality of the Starry weever Trachinus radiatus were studied for the first time from 214 individuals collected in the Gulf of Tunis between February 2014 and January 2016. The significant relationship between length-weight was observed for males (a = 0.011, b = 2.992, R2 = 0.981, n = 77) and females (a = 0.010, b = 3.036, R² =0.957, n = 109). Age was estimated by the observation of otoliths transverse thin sections. Age of individuals ranged from 1 to 15 years. The precision was measured by two age estimations from two experts and indicated a good agreement between them (PA = 85.6%, CV = 3.8% and IAPE = 4.1%). The growth parameters of the von Bertalanffy model were TL∞ = 38.41 cm, W∞ = 507.47 g, K = 0.3396 year-1, t0 = 0 year for males...
Tipo: Text
Palavras-chave: Growth; Age; Mortality; Trachinus radiatus; Starry weever; Gulf of Tunis; South-Central Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00477/58905/61467.pdf

Impacts of climatic anomalies on provisioning strategies of a Southern Ocean predator
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lea, Mary-anne; Guinet, Christophe; Cherel, Yves; Duhamel, Guy; Dubroca, Laurent; Pruvost, Patrice; Hindell, Mark.
The large temporal and spatial variability in marine productivity encountered by marine predators may negatively influence breeding success. The Antarctic fur seal Arctocephalus gazella (AFS), a marine predator in the Southern Ocean (SO) ecosystem with a circumpolar distribution, exhibits a short, 4 mo lactation coinciding with increased summer marine productivity. The diet of AFS, and the distance to significant and productive oceanographic features, such as the Antarctic Polar Frontal Zone (PFZ), varies considerably between populations. We studied the foraging activity, foraging efficiency and the pup provisioning strategies of lactating AFS at a key breeding site in the southern Indian Ocean, the Kerguelen Archipelago. Foraging parameters were examined...
Tipo: Text
Palavras-chave: Antarctic fur seal; Polar front; Pinniped; ENSO; Foraging; Growth; Diving; Seabird; Myctophid; Maternal care.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/00247/35847/34356.pdf

No efficiency of the lateral system on nocturnal feeding in the European sea bass (Dicentrarchus labrax L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faucher, Karine; Dutto, Gilbert; Coves, Denis; Aubert, Anne; Lagardere, Jean-paul.
In order to evaluate the effect and consequence of lateral system inactivation on fish nocturnal feeding, the differential growth of groups of European sea bass maintained in different rearing conditions were compared. Whereas some fish with intact lateral system (placebo fish) were placed under a photoperiod of 12-L: 12-D, other placebo fish were kept in the dark. In the same way, fish deprived of lateral system by section of their lateral system nerves and antibiotic treatment were placed under a photoperiod of 12-L: 12-D and the others in the dark. For each of these four rearing conditions, two sets of experiment were realized. Percent mortality, feed rhythm, averaged daily feed demand, specific growth rate and feed efficiency were compared among these...
Tipo: Text
Palavras-chave: Feed efficiency; Growth; Nocturnal feeding; Photoperiod; Lateral system; European sea bass.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2267.pdf

Differences in Bodily Growth Between Young Footballers and Basketball Players
Provedor de dados: International Journal of Morphology
Autores: Rexhepi,Agron; Brestovci,Behlul.
Human body growth means structural changes of human body, whereas development means its functional changes. The purpose of this study was to study the influence of different sports in bodily growth of the young athletes. In order to analyze the influence of different sports profiles on human physical growth, in this study, 3011 footballers and 393 basketball players were tested. Two groups of athletes, according to their ages have been separated in four groups (ages 13,14,15 and 16 years old). The evaluation of bodily growth of young athletes has been tested based on changes of nine morphometrical variables. The data obtained were analyzed in terms of basic statistical parameters, whilst the differences between independent groups were analyzed by T-test...
Tipo: Journal article
Palavras-chave: Growth; Footballers; Basketball players; Morphometrical variables; Discriminant canonical analyses.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000200014

Mandible Measurements and Dental Midline Deviation after Alveolar Nerve Transection in Growing Rabbits
Provedor de dados: International Journal of Morphology
Autores: Valdivia Gandur,Iván; Tallón Walton,Victoria; Carvalho Lobato,Patricia; Lozano de Luaces,Vicente; Manzanares Céspedes,María Cristina.
The relationship between sensitive innervation and normal mandibular bone development has been described in the literature. Therefore, neural damage is a potential cause of osseous deformities, particularly in growing subjects. The aim of this project is to present the mandible measurements obtained after the transection of the inferior alveolar nerve of growing rabbits. A specific surgical protocol was designed to carry out the unilateral nerve transection by avoiding musculoskeletal injuries. Twenty New Zealand White rabbits one week post-weaning were used, 12 as an experimental group and 8 as a control group (Sham operated). The animals were sacrificed 90 days postoperatory, and the mandibles carefully dissected. Dental midline deviation data were...
Tipo: Journal article
Palavras-chave: Mandible; Growth; Development; Anatomy; Dissection; Stomatognathic system.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000100008

Morphometric Analysis of Developing Maxillary Sinuses in Human Foetuses
Provedor de dados: International Journal of Morphology
Autores: Farah,Ghaus; Nafis,Ahmad Faruqi.
The development of the paranasal sinuses, in human race and in many mammals remained as much an enigma as it did nearly two millennia ago. Morphometric analysis of maxillary sinuses in human foetuses are not fully documented and also their morphological studies in Indian population are non-existent. So the present study was conducted to determine the different diameters, the pattern of growth, sexual dimorphism and bilateral variations in maxillary sinuses. 37 human foetuses of different age groups (16 - 34 wks of IUL) were divided into five groups on the basis of age. Maxillary sinuses were dissected out from the nasal aspects of maxillae and their various diameters were measured with the help of Vernier callipers. The percent growth of AP diameter was...
Tipo: Journal article
Palavras-chave: Maxillary sinus; Vernier calliper; Morphometry; Growth; Sexual dimorphism.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000400002

The Body Weight Changes and Gut Morphometry of Clarias gariepinus juveniles on Feeds Supplemented with Walnut (Tetracarpidium conophorum) Leaf and Onion (Allium cepa) Bulb Residues
Provedor de dados: International Journal of Morphology
Autores: Bello,O. S; Emikpe,B. O; Olaifa,F. E.
This experiment was conducted to evaluate the effects of walnut (T. conophorum) leaf and onion (A. cepa) bulb on the gut morphometry of Clarias gariepinus towards elucidating its mechanism of growth promotion. Twenty Clarias gariepinus juveniles (7.39±0.29g/ fish) were allocated to nine treatments, with three replicates each. Nine experimental diets were formulated at 40% crude protein representing different level of walnut leaf and onion bulb (0.5%, 1.0%, 1.5% and 2.0%) respectively and the control diet was free from walnut leaf and onion bulb and were fed twice daily at 3 % body weight for 12 weeks. Growth indices like Mean Weight Gain (MWG), Specific Growth Rate (SGR), Feed Intake (FI) and Feed Conversion Ratio (FCR) were measured. Gut morphormetry such...
Tipo: Journal article
Palavras-chave: Onion bulb; Walnut leaf; Clarias gariepinus; Growth; Morphometry.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000100045

Asymmetry of Human Skull Base During Growth
Provedor de dados: International Journal of Morphology
Autores: Russo,Priscilla Perez; Smith,Ricardo Luiz.
Knowledge about human skull asymmetry in normal dry specimens is useful as a parameter for medical and dentistry practice. Skull base was investigated with the objective to validate the method of indirect measurement with digital pictures and to evaluate the degree of asymmetry from human skull base in different ages. We analyzed 176 normal identified human skulls, divided by age in the following groups: Fetuses, newborn, children and adults. Measures were taken from a central point: pharyngeal tubercle and 4 lateral points: foramen ovale, foramen spinosum, carotid canal and stylomastoid foramen using digital biometry after a comparative validation with directed method performed with caliper. Results were presented as asymmetry indexes and data were...
Tipo: Journal article
Palavras-chave: Anatomy; Asymmetry; Growth; Skull.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300062

Age at Menarche and Related Factors in Girlsof Urban Areas of Markazi (Central) Province of Iran
Provedor de dados: International Journal of Morphology
Autores: Bayat,ParvinDokht; Ghanbari,Ali; Khazaei,Mozafar; Ghorbani,Rostam; Amiri,Sara.
The age at menarche is an indicator of racial, geographical and nutritional patterns of different societies. This cross-sectional study conducted on 1223 girls aged 14-20 in the Markazi (Central) Province, Iran in 2010. In this research, the age at menarche, as the main variable, was determined for each city and compared between different cities. The statistical analyses included c2 test for determining statistically significant differences, variance analysis for determining the difference between groups, and Pearson correlation coefficient for determining the relationship between variables. The average age of first menstruation was 13.21±1.33 years in the Markazi Province, with no significant difference among the cities of the province. This age is...
Tipo: Journal article
Palavras-chave: Fertility; Growth; Iran; Menarche.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000100002

Application of Principal Component Factor Analysis in Quantifying Size and Morphological Indices of Domestic Rabbits
Provedor de dados: International Journal of Morphology
Autores: Yakubu,A; Ayoade,J. A.
Body weight and four morphostructural traits namely body length, heart girth, thigh circumference and ear length of 103 New Zealand White x Chinchilla crossbred rabbits were measured. The investigation aimed at describing objectively the interdependence among conformation traits and to predict body weight from their independent factor scores using principal component analysis. Phenotypic correlations between body weight and body dimensions were highly significant (r=0.61 ­ 0.91; P&lt;0.01). Pairwise correlations of the body shape characters ranged from moderate to high values. From the factor analysis with varimax rotation of the intercorrelated traits, two principal components which accounted for 90.27% of the total variance were extracted. The first...
Tipo: Journal article
Palavras-chave: Body size; Growth; Rabbits.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400009

Anthropometrical Characteristics and Somatotype of Young Macedonian Soccer Players
Provedor de dados: International Journal of Morphology
Autores: Gontarev,Seryozha; Kalac,Ruzdija; Zivkovic,Vujica; Ameti,Vullnet; Redjepi,Agim.
The success in sport performance is closely related to the physical condition of the sportsman. In the assessment of the physical status except physiological and fitness parameters, significant influence have the anthropometric parameters. The aim of the study was dual: to assess the changes in the anthropometric characteristics and the somatotype of young soccer players at different ages and to compare these characteristics with the general population. The analyzed measurements of 486 young soccer players who play in teams of the First national league, with an average age 15.8±1.4. The soccer players were divided into five subgroups, at age difference of 1 year. In the sample height, weight, BMI index, diameters, volumes and skin folds were measured, also...
Tipo: Journal article
Palavras-chave: Soccer; Young; Anthropometry; Somatotype; Growth; Age.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100024

Maternal Malnutrition Diet During Lactation Period Leads to Incomplete Catch-Up Growth in Femur of the Pups at Adulthood
Provedor de dados: International Journal of Morphology
Autores: Babinski,Monique S. D; Ramos,Cristiane F; Fernandes,Rodrigo M. P; Cardoso,Gilberto P; Babinski,Marcio A.
The aim of this study was to evaluate the effects of maternal protein and energy restriction during lactation, analyzing on morphological dimensions whether there was catch-up growth through normative nutrition restored, as well as on mechanical axis of femur of the offspring at adulthood. At parturition, Wistar rat dams were randomly assigned to the following groups: 1) control group (C) - free access to a standard laboratory diet containing 23 % protein, 2) protein-energy restricted group (PER) - free access to an isoenergetic, protein-restricted diet containing 8 % protein, and 3) energy-restricted group (ER) ­ fed with restricted amounts of a standard laboratory diet. At weaning, all pups were separated of dams and received free access to a standard...
Tipo: Journal article
Palavras-chave: Rats; Femur; Undernutrition; Growth; Morphometry.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100011

Sodiomyces alkalinus, a new holomorphic alkaliphilic ascomycete within the Plectosphaerellaceae
Provedor de dados: Naturalis Digital Academic Repository
Autores: Grum-Grzhimaylo, A.A.; Debets, A.J.M.; Diepeningen, A.D. van; Georgieva, M.L.; Bilanenko, E.N.
In this study we reassess the taxonomic reference of the previously described holomorphic alkaliphilic fungus Heleococcum alkalinum isolated from soda soils in Russia, Mongolia and Tanzania. We show that it is not an actual member of the genus Heleococcum (order Hypocreales) as stated before and should, therefore, be excluded from it and renamed. Multi-locus gene phylogeny analyses (based on nuclear ITS, 5.8S rDNA, 28S rDNA, 18S rDNA, RPB2 and TEF1-alpha) have displayed this fungus as a new taxon at the genus level within the family Plectosphaerellaceae, Hypocreomycetidae, Ascomycota. The reference species of actual Heleococcum members showed clear divergence from the strongly supported Heleococcum alkalinum position within the Plectosphaerellaceae, sister...
Tipo: Article / Letter to the editor
Palavras-chave: Alkaliphilic fungi; Growth; Heleococcum alkalinum; Molecular phylogeny; Scanning electron microscopy; Taxonomy.
Ano: 2013
URL: http://www.repository.naturalis.nl/record/532154

Growth of the skull of the Harbour Porpoise, Phocoena Phocoena (Linnaeus, 1758), in the North Sea, after age determination based on dentinal growth layer groups
Provedor de dados: Naturalis Digital Academic Repository
Autores: Noldus, L.P.J.J.; Klerk, R.J.J. De.
This study of the Harbour Porpoise Phocoena phocoena (Linnaeus, 1758) has been undertaken in order to find out whether differences in size and growth rate between the skulls of males and females could be demonstrated. Stuart &amp; Morejohn (1980) have established this phenomenon in the population of the north-eastern Pacific. The material on which this study is based, consists of 76 skulls present in the collection of the Rijksmuseum van Natuurlijke Historie (RMNH), Leiden. They all belong to specimens stranded on the Dutch coast. In order to determine the age, of all these specimens the number of dentinal growth layer groups (GLG) in the teeth was counted. Thereupon 32 cranial characters were measured of each skull; these measurements were plotted against...
Tipo: Article / Letter to the editor
Palavras-chave: Mammalia; Cetacea; Phocoenidae; Phocoena phocoena; North Sea; Skull; Growth; Teeth; Age determination; 42.84.
Ano: 1984
URL: http://www.repository.naturalis.nl/record/319036

Ontogenetic trajectories and hind tibia geometric morphometrics of Holymenia clavigera (Herbst) and Anisoscelis foliacea marginella (Dallas) (Hemiptera: Coreidae)
Provedor de dados: Neotropical Entomology
Autores: Rodrigues,Daniela; Sanfelice,Daniela; Monteiro,Leandro R.; Moreira,Gilson R.P.
Holymenia clavigera (Herbst) and Anisoscelis foliacea marginella (Dallas) (Hemiptera: Coreidae) are distributed in southern Brazil and belong to the poorly studied tribe Anisoscelini. Preliminary observations indicate an ample coexistence of these species in terms of host-plant use. There is also a strong similarity regarding egg and nymph morphology. We characterized and compared their ontogenetic trajectories by means of growth curves and multivariate ontogenetic allometry, since the only apparent difference between these species is a remarkable growth in the hind tibia of A. foliacea marginella. Because their hind tibia is similar in the early instars, the shape variation of this structure was quantified by the thin plate splines function with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Anisoscelini; Growth; Immature stage; Shape analysis.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000500008

Freshwater temperature in the state of Rio Grande do Sul, Southern Brazil, and its implication for fish culture
Provedor de dados: Neotropical Ichthyology
Autores: Garcia,Luciano de Oliveira; Copatti,Carlos Eduardo; Wachholz,Flávio; Pereira Filho,Waterloo; Baldisserotto,Bernardo.
In this study we verified data of water temperatures collected by CORSAN-RS from 1996 to 2004 in several cities of the state of Rio Grande do Sul, southern Brazil, and analyzed the possibility of raising the most cultivated fish species in Brazil. The water temperature from 1996 to 2004 was 16 to 28ºC in summer, 17 to 23ºC in fall, 14 to 17ºC (down to 9ºC in the coldest months) in winter and 14 to 21ºC in spring. Native species of this state, such as silver catfish (Rhamdia quelen), traíra (Hoplias malabaricus), dorado (Salminus brasiliensis), pintado (Pimelodus maculatus), as well as carps (family Cyprinidae), are resistant to the low winter temperatures. These species have a lower growth rate in coldest months (winter/spring) but a good development in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish growth; Mortality; Growth; Freshwater fish; Water temperature.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200016

Life-history characteristics of Pseudoplatystoma metaense (Teleostei: Siluriformes: Pimelodidae) from the northwestern Orinoco River Basin
Provedor de dados: Neotropical Ichthyology
Autores: Pérez,Alfredo; Fabré,Nidia Noemí.
ABSTRACT The tiger shovelnose catfish (Pseudoplatystoma metaense) identified in literature prior to 2007 as P. tigrinum is the most important catfish species in the Orinoco River fishery, because of its abundance and high market price. The aim of this study was to obtain age, growth and population parameters of the of tiger shovelnose catfish. A total of 2,183 catfish, were sampled during 1996-2003 from the commercial fishery of the northwestern Orinoco River Basin in Venezuela, and were aged by examination of otoliths. Validation of otolith annuli was achieved with marginal increment analysis. Results suggest that, the opaque and translucent zones of otoliths were formed once per year. Length-weight relation and the von Bertalanffy growth model parameters...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Growth; Otoliths; Overfishing; Venezuela.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100209

Induced spawning and early ontogeny in hatchery-reared catfish Zungaro jahu (Siluriformes: Pimelodidae)
Provedor de dados: Neotropical Ichthyology
Autores: Nogueira,Lorena B.; Azevedo,Pedro G.; Canelhas,Mônica R.; Bedore,Alessandra G.; Lopes,João M.; Godinho,Hugo P.
Hatchery-kept catfish jahus Zungaro jahu (Ihering, 1898) were induced to spawn with carp pituitary extract. The telolecithal eggs were round (1.6 ± 0.1 mm in diameter), demersal, free, and covered with a 0.4 mm-thick jelly coat. The gonadosomatic index of 2.8 was comparable to that of other Pimelodidae. The number of eggs x g of ova-1 was 804 ± 144. Hatching occurred 14.5 h after fertilization, at a temperature of 27.3 ± 0.4º C. The newly-hatched embryos measured 3.9-4.3 mm of total length (TL). At 18 h post-hatching (HPH; 5.3 ± 0.1 mm TL), the retina was pigmented, the mouth opened and dorsoflexion of the notochord had initiated. At 36 HPH (6.4 ± 0.2 mm TL), fusiform chromatophores were vertically arranged in the primordial fin fold and the notochord was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Early ontogenesis; Growth; Morphological development; Neotropical catfish.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100009

Influence of spawning procedure on gametes fertilization success in Salminus hilarii Valenciennes, 1850 (Teleostei: Characidae): Implications for the conservation of this species
Provedor de dados: Neotropical Ichthyology
Autores: Honji,Renato M.; Mello,Paulo H.; Araújo,Bruno C.; Rodrigues-Filho,Jandyr A.; Hilsdorf,Alexandre W. S.; Moreira,Renata G.
Artificial reproduction and gamete fertilization were evaluated in Salminus hilarii wild and domesticated broodstocks. Wild and domesticated broodstocks were artificially induced to reproduction using a carp pituitary treatment. Four groups were considered: Group 1 (G1), fish caught in the wild maintained for three years in the same conditions as the domesticated broodstocks and spawned naturally; Group 2 (G2), broodstock born and raised in captivity and spawned naturally; Group 3 (G3), wild broodstocks, which were manually stripped for gamete collection and dry fertilization; and Group 4 (G4), domesticated males and females, also manually stripped. Oocytes, eggs, and larvae were sampled at different time intervals throughout embryonic development. Yolk...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Early development; Growth; Reproduction; Tabarana.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200014

Population dynamics of Prochilodus nigricans (Characiformes: Prochilodontidae) in the Putumayo River
Provedor de dados: Neotropical Ichthyology
Autores: Bonilla-Castillo,César A.; Córdoba,Edwin Agudelo; Gómez,Guber; Duponchelle,Fabrice.
ABSTRACT The black prochilodus (Prochilodus nigricans) is one of the most landed scaled fish species of the middle and upper parts of the Putumayo River, in the tri-national area between Colombia, Ecuador and Peru. Despite its importance, biological information about this species is too scant to guide fisheries management in this portion of the Colombian Amazon. In this study, 10884 individuals were sampled in the fish markets of Puerto Leguízamo between 2009 and 2017. This sampling was used to document reproductive patterns, but also growth and mortality parameters from length frequency distributions. The size at which all fish were mature was 22 cm Ls, which should be the established as the minimum size of capture to ensure that all fish have had a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Black prochilodus; Colombia; Growth; Mortality; Reproduction.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000200212

Effect of salinity on survival, growth and biochemical parameters in juvenile Lebranch mullet Mugil liza (Perciformes: Mugilidae)
Provedor de dados: Neotropical Ichthyology
Autores: Lisboa,Viviana; Barcarolli,Indianara Fernanda; Sampaio,Luís André; Bianchini,Adalto.
Teleost fish growth may be improved under isosmotic condition. Growth and metabolic performance of juvenile Mugil liza (isosmotic point: 12‰) were evaluated after 40 days in different salinities (0, 6, 12 and 24‰). Tests were performed in quadruplicate (30 fish/tank; 0.48 ± 0.1 g body weight; 3.27 ± 0.1 cm total length) under controlled water temperature (28.2 ± 0.1ºC) and oxygen content (&gt;90% saturation). Fish were fed on artificial diet (50% crude protein) four times a day until apparent satiation. Results showed that salinity influenced juvenile mullet growth. Fish reared at salinity 24‰ grew better than those maintained in freshwater (salinity 0‰). Gill Na+,K+-ATPase activity and whole body oxygen consumption showed an U-shape-type response over the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycogen; Growth; Metabolism; Na+; K+-ATPase.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000200447

Comparison of growth and exploratory behavior in mice fed an exclusively milk formula diet and mice fed a food-pellet diet post weaning
Provedor de dados: Obihiro University of Agriculture and Veterinary Medicine Academic Repository (OAK)
Autores: Ishii, Toshiaki; Ito, Takuya; Nishimura, Masakazu; 石井, 利明.
An exclusively milk formula diet stunted the growth of mice immediately following weaning. Milk-fed mice displayed a low-frequency profile of exploratory behavior, while pellet-fed mice showed high-frequency exploration. In contrast to exploratory behavior, feeding behavior did not differ significantly between milk- and pellet-fed mice. Despite showing low-frequency exploratory behavior, mice on an exclusively milk formula diet showed no difference in behavioral activities analyzed by an automatic hole-board apparatus compared to pellet-fed mice. These results suggest that the growth stunt caused by an exclusively milk formula diet retards the acquisition of active exploratory behavior without affecting the emotional state of mice.
Palavras-chave: Feeding; Exploratory behavior; Growth; Weaning; Milk formula.
Ano: 2005
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/741

生育中のナガイモの粘弾性の変化
Provedor de dados: Obihiro University of Agriculture and Veterinary Medicine Academic Repository (OAK)
Autores: Hironaka, Kazunori; Sawaeda, Kenji; Ishibashi, Kenichi; 弘中, 和憲; 澤枝, 健治; 石橋, 憲一.
The change in the viscoelasticity of the Chinese yam during growth was investigated from mid-August to late November, 1988 in the Tokachi district of Japan. The Chinese yam had peak viscoelasticity around October 24. Its viscosity was correlated with the insoluble solid content, whereas its rigidity was associated with the mucilage content. Viscosity and rigidity values of Chinese yam during maturation reached maximum when the soil temperature at 40 cm decreased to around 11 centigrade.
Palavras-chave: Chinese yam; Growth; Soil temperature; Soil temperature; ナガイモ; 生育; 粘弾性; 地温.
Ano: 1992
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1883

Estudio preliminar de la edad, el crecimiento, área de distribución y pesca de la corvina negra, Pogonias cromis, en el litoral de la provincia de Buenos Aires.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Urteaga, J.R.; Perrotta, R.G.
Argentine black drum distributes mainly in shallow waters associated to estuarine areas, particularly to  Samborombon Bay where it may be detected throughout the year. Nevertheless, it can also be spotted more southwards (40°S) and at deeper waters. During summer, catches of the species in Samborombon Bay are practically negligible, probably due to movements towards shallow waters out of reach of the inshore commercial  fleet. Landings increase in autumn and show peak values in winter, coinciding with the fishing season of whitemouth croaker, Micropogonias furnieri, whose geographical distribution within the bay overlaps that of  black drum. As of 1995, landings of black drum showed increasing trends both in Argentina and Uruguay. These increments coincide...
Tipo: Journal Contribution
Palavras-chave: Age determination; Growth; Landing statistics; Geographical distribution; Fishery management; Coastal fisheries; Growth; Age determination; Geographical distribution; Fishery management; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 2001
URL: http://hdl.handle.net/1834/2593

Growth, mortalities and yield per recruit of the shrimp fish scad Alepes djedaba (Forskal) (F. Carangidae), from Abu Qir Bay, Eastern Alexandria, Egypt
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: El-Sayed, H.Kh.A.
Growth and population dynamics parameters of Alepes djedaba as an exotic carangid fish species from Red Sea into the Levant Basin of the Mediterranean Sea, were investigated. Fish samples were obtained from purse-seiners operating during the day time from Jan. to Dec. 2003 in Abu Qir Bay, Eastern Alexandria. The results obtained show that back-calculated lengths (based upon otolith readings) for the first; second and third age groups were 10.38; 15.4 and 19.32 cm TL respectively, the estimated Bertalanffy growth parameters were L∞=33.29 cm, K=0.2473 and t0= -0.51. The Length-weight relationship was represented by the formula: Log W=-1.9245+2.9762 Log L. Total mortality (Z), natural mortality (M) and fishing mortality (F) were 1.85; 0.62 and 1.23...
Tipo: Journal Contribution
Palavras-chave: Mortality; Yield/recruit; Growth; Carangidae.
Ano: 2005
URL: http://hdl.handle.net/1834/4995

Estudio de la edad y crecimiento del recurso merluza común (Merluccius hubbsi) durante el período 1968-1970; determinación de las fluctuaciones del recurso
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Villarino, M.F.
La merluza común (Merluccius hubbsi) es uno de los más importantes recursos pesqueros del Mar Argentino. Constituye aproximadamente el 68 por ciento de las capturas desembarcadas, según lo indicado por las estadísticas oficiales (Boletín Oficial, Subsecretaría de Pesca, 1988). Su explotación ha mantenido una tendencia creciente a partir de 1974, como consecuencia del incremento de las capturas de Argentina y el plan de desarrollo pesquero implementado por Uruguay. Las capturas de 1978 y 1979 superaron ampliamente el valor del rendimiento máximo sostenible, estimado en 344.000 toneladas (Verazay y Otero, 1986), y se mantienen próximas al mismo a partir del último año mencionado.Como resultado de esta explotación el recurso pesquero se redujo aproximadamente...
Tipo: Theses and Dissertations
Palavras-chave: Age determination; Otoliths; Growth.
Ano: 1990
URL: http://hdl.handle.net/1834/5027

L’algue rouge "Gracilaria verrucosa" (hudson) papenfuss de la lagune de Bizerte (Tunisie septentrionale) : essai de culture en mode suspendu et composition biochimique
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mensi, F.; Ksouri, J.; Hammami, W.; Romdhane, M.S.
L'algue rouge, Gracilaria verrucosa, a été cultivée, durant le printemps 2009, en mode suspendu à différents emplacements et profondeurs  représentant les différences biogéochimiques de la lagune de Bizerte au Nord de la Tunisie. La concentration et la distribution des nutriments (ammonium, phosphate) dans l'eau, ainsi que la salinité, la température, l’oxygène et la transparence de l’eau ont été déterminées. Les méthodes analytiques internationales standardisées ont été appliquées. Les effets du  mode de culture, de l’emplacement et de la profondeur sur les rendements en poids, protéines, R-Phycoérythrine et sucres totaux  de l’algue ont été étudiés. La croissance de Gracilaria a été similaire dans les différents sites mais plus lente dans les profondeurs...
Tipo: Journal Contribution
Palavras-chave: Algal culture; Ammonium compounds; Biochemical composition; Biogeochemistry; Carbohydrates; Dissolved oxygen; Environmental conditions; Growth; Intensive culture; Lagoons; Off-bottom culture; Raw materials; Red algae; Biogeochemical cycle.
Ano: 2009
URL: http://hdl.handle.net/1834/4497

Estudio de edad y crecimiento de la raya hocicuda Dipturus chilensis (Guichenot,1848) en el Atlántico Sudoccidental (34º -55º LS y 52º -69º LW)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Zavatteri, A.
This paper deals with the age and growth parameters of the Southwest Atlantic beaked skate Dipturus chilensis, as well as with some reproductive features of the species. Samples of individuals inhabiting 34°-55°S and 52°- 69°W were analyzed. They were taken during surveys carried out by the National Institute for Fisheries Research and Development (INIDEP) research vessels, as well as by a landing sampling at Mar del Plata port. The fish age was determined by counting growth rings from thin sections of the vertebral centra of 414 fish ranging 24-110 cm (203 males) and 24-115 cm (211 females) total length. The vertebral sections were stained using cobalt  hloride. Both average per cent error (APE=5.94) and precision (D=5.89) indexes suggested that the...
Tipo: Theses and Dissertations
Palavras-chave: Age; Age determination; Growth; Length-weight relationships; Sexual maturity; Age determination; Growth; Age; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2010
URL: http://hdl.handle.net/1834/3585

Validation of length frequency analysis for boops boops (bogue) growth estimation
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: El-Haweet, A.; Hegazy, M.; Abu-Hatab, H.; Sabry, E.
Scales reading and length frequency distribution were used for age determination and growth estimation of Boops boops (Bogue) stock of Western Mediterranean Coast of Egypt. Age determination using scale was done and the time of annulus formation was detected by the marginal increment index. Bhattacharya’s method was used for length frequency analysis. Both methods showed 6 age groups. ANOVA test revealed insignificant differences between both estimates of length at age results. Growth parameters estimated using length-at-age data from both methods confirming the age determination results. Growth performance index indicated high similarity between the two estimates. The results revealed the compatibility of length frequency distribution to scale reading for...
Tipo: Journal Contribution
Palavras-chave: Growth; Scale reading; Stock assessment; Length; Growth; Length; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4260.
Ano: 2005
URL: http://hdl.handle.net/1834/1221

Crecimiento de Scenedesmus quadricauda en  efluentes cloacales de la ciudad de Trelew, Chubut, Argentina
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Méndez, L.; Albarracín, I.; Cravero, M.; Salomón, R.
La creciente problemática frente al tratamiento de aguas residuales y su posible reuso, ha planteado sistemas biológicos que remuevan los contaminantes manteniendo el ecosistema y disminuyendo costos. Este trabajo consiste en un ensayo de biorremediación, evaluando la tasa de crecimiento de Scenedesmus quadricauda cultivada en efluentes domiciliarios de la ciudad de Trelew, Chubut, Argentina. Diariamente se determina conductividad, pH y densidad celular. Al inicio y al final del ensayo se obtienen valores para fosfato, fósforo total, sulfuro, amoníaco, nitrito, nitrato, detergentes, DBO5, DQO y número más probable de coliformes totales y fecales. Se observa una disminución en amoníaco, fósforo, fósforo total, DBO5 y DQO, lo que confirma la efectividad en...
Tipo: Journal Contribution
Palavras-chave: Growth; Waste water; Water purification.
Ano: 2011
URL: http://hdl.handle.net/1834/4630

Análisis de la distribución y dinámica poblacional de lenguados de la Provincia de Buenos Aires (Pisces, Bothidae)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Fabré, N.N.
Los lenguados constituyen un importante recurso pesquero en el Mar Argentino. Más que en los volúmenes desembarcados (9 .731 t en 1991), esta importancia se centra en su elevado valor de comercialización debido a la alta calidad de su carne. Atendiendo a los desembarques totales realizados en el Mercado de Concentración Pesquera de Mar del Plata, los lenguados ocupan el octavo lugar. Estos desembarques están compuestos principalmente por especies de porte mediano a grande pertenecientes al género Paralichthys, y por ejemplares de tamaño mediano o pequeño de las especies Xystreuris rasile, y en menor proporción, Paralichthys isosceles. Este recurso es explotado, en el sector bonaerense, por las flotas de rada o ría y costera, mientras que la flota de altura...
Tipo: Theses and Dissertations
Palavras-chave: Geographical distribution; Population dynamics; Population structure; Growth; Reproduction; Mortality; Environmental effects; Ecosystems; Marine fish.
Ano: 1992
URL: http://hdl.handle.net/1834/5158

Grossissement des juveniles de palourdes "Ruditapes decussatus" (l., 1758), sur l’estran de Zarat (golfe de Gabès, Tunisie), dans des conditions expérimentales.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Zouari, M.; Hitonori, N.; Lymayem, Y.; M'Rabet, R.; Dhraief, M.N.; Missaoui, H.; Guergej, H.; Kraiem, M.M.
Le potentiel de grossissement de la palourde Ruditapes decussatus (L. 1758), élevée dans des poches de filet de 1 m2 de surface, a été évalué sur l’estran de Zarat (golfe de Gabès) pour la période de juillet 2006 à novembre 2007. Dans une première expérience, trois niveaux de la marée, représentant des chenaux de drainage de l’eau, existants entre la ligne de marée haute et celle de marée basse, ont été comparés sur une durée de 16 mois. Chacun des niveaux a été représenté par un triplicata de sacs de 150 individus. Dans une seconde expérience, trois densités de mise en charge différentes ont été comparées sur une durée de 17 mois. Pour cela, deux sacs de 100 individus chacun et deux autres de 200 individus chacun ont été alignés à l’expérience précédente,...
Tipo: Journal Contribution
Palavras-chave: Clam culture; Comparative studies; Environmental conditions; Estuaries; Experimental culture; Growth; Growth rate; Marine aquaculture; Marine molluscs; Population density; Rearing; Stocking density; Clams.
Ano: 2009
URL: http://hdl.handle.net/1834/4495

Effet du Benzo [a] pyrène sur la croissance et la production du bactérioplancton provenant du canal et de la lagune de Bizerte
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Meddeb, M.; Ben Othman, H.; Hadj Mabrouk, H.; Sakka Hlaili, A.
Cette étude s’est intéressée à déterminer l’effet du Benzo [a]pyrène, un contaminant organique de la famille des HAP, sur la communauté bactérienne planctonique, au niveau de la lagune (zone faiblement polluée par le B[a]py) et le canal (zone très polluée par le B[a]py) de Bizerte en été et automne 2009. Des communautés bactériennes, collectées des deux stations, ont été maintenues en culture pendant 6 jours sous trois différents traitements, un témoin (non contaminé) et deux contaminations avec 0,5 mg l-1 (B[a]py1) et 1 mg l-1 (B[a]py2) du B[a]py. Au cours de l’incubation, l’abondance, le taux de production et le taux de croissance du bactérioplancton ont été déterminés. En juillet, le bactérioplancton a présenté, dans le milieu naturel de la lagune, une...
Tipo: Journal Contribution
Palavras-chave: Nannoplankton; Accumulation; Biological production; Growth.
Ano: 2013
URL: http://hdl.handle.net/1834/5904

Biologie et exploitation du poulpe Octopus vulgaris (Cuvier, 1797) des côtes mauritaniennes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Dia, M.A.
L’étude porte sur l’exploitation, la biologie et la dynamique du poulpe (Octopus vulgaris, Cuvier) des eaux mauritaniennes. La répartition spatio-temporelle dans la région du Cap Blanc ne semble être liée ni à la taille, ni au sexe, mais varie au cours de l’année. L’analyse de l’état actuel de la pêcherie basée sur les congélateurs céphalopodiers met en évidence une augmentation de l’effort de pêche et la poursuite de chute des p.u.e. La composition des captures révèle une progression du pourcentage des individus de poids inférieur à 200 grammes (« poulpo »). L’étude biologique montre qu’il existe deux saisons de reproduction par an (mai-juillet et septembre-novembre) qui engendrent deux recrutements, l’un en mai et l’autre à partir de septembre. La...
Tipo: Theses and Dissertations
Palavras-chave: Reproduction; Common octopus; Population dynamics; Environnement; Dynamique de population; Exploitation; Environment; Poulpe; ZEE Mauritanienne; Distribution; Mauritanian EEZ; Biologie; Croissance; Growth; Octopus vulgaris; Biology; Octopus fisheries.
Ano: 1988
URL: http://hdl.handle.net/1834/675

Etude de l'age et de la croissance de deux especes de Dentes (Dentex dentex et de Dentex maroccanus) des cotes tunisiennes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Chammam-Abdelkader. B.; Kraiem. M.M.; El Abed. A.
The survey of age and growth of two Dentex species (Dentex dentex and Dentex maroccanus) from the Tunisian coasts shows a difference of the growth rate between the two species with a faster growth for Dentex dentex. Any difference of growth has been noticed within the same species. However females present superior maximal sizes comparing to the males for the two species. Concerning the weight growth, the males of Dentex dentex seemed heavier than the females, whereas for Dentex maroccanus the females show a weight growth superior to that of the males.Original Abstract: L'etude de l'age et de la croissance de deux especes de Dentes (Dentex dentex et Dentex maroccanus) des cotes tunisiennes nous a permis de degager une difference du taux de croissance entre...
Tipo: Journal Contribution
Palavras-chave: Dentex  Dentex dentex  Dentex maroccanus; Age; Comparative studies; Growth; Dentex; Dentex dentex; Dentex maroccanus; Http://aims.fao.org/aos/agrovoc/c_10333; Http://aims.fao.org/aos/agrovoc/c_43266; Http://aims.fao.org/aos/agrovoc/c_43269.
Ano: 2004
URL: http://hdl.handle.net/1834/4243

Fijación y crecimiento del ostión de mangle Ostrea columbiensis (Hanley) 1946 a nivel de cultivo
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Yoong, F.; Reinoso, B.
The present study was carried out in samples of Ostrea columbiensis (Hanley) taken from the estero ”Las Alforjas”, during de period between march-december of 1989. Three stations were selected in the estero, in order to observe the fixation, growth and survival of the larvae in special collectors designed by the authors. The percentage of fixation in the station 1 was 25,8%, in the station 2, 37,8% and in the station 3, 36,4%. The larvae oyster got fixed, preferably, by the external face of the collector (big valve) in a percentage of 64,3, while on the external face this percentage was 35,7%. The average height of the oysters during the whole period of study was 52 mm, with a monthly increment of 5,2 mm. The percentage of the oysters survival was 84,4%....
Tipo: Journal Contribution
Palavras-chave: Ostrea columbiensis; Mollusc culture; Growth; Larval development; Survival; Mollusc culture; Growth; Survival; Http://aims.fao.org/aos/agrovoc/c_4896; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 1993
URL: http://hdl.handle.net/1834/3053

Premiere approche de la croissance de la Squille Squilla mantis (l., 1758) dans les eaux Tunisiennes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mili, S.; Ennouri, R.; Jarboui, O.; Missawi, H.
Les distributions des tailles de la squille Squilla mantis (L., 1758) pêchée dans les eaux tunisiennes (golfes de Tunis, Hammamet et Gabès) ont été analysées par différentes méthodes pour étudier la croissance de ce crustacé. La décomposition modale des distributions de taille des captures de cette espèce a permis de calculer les paramètres de croissance L∞ (mm), K (an-1) et t0 de S. mantis en utilisant le modèle de Von Bertalanffy (1938). La fonction mathématique de Von Bertalanffy a permis de montrer que dans les trois golfes de la Tunisie, la croissance des femelles est inférieure à celle des mâles. Le taux de croissance est supérieur pour les squilles du golfe de Gabès par rapport à celui du golfe de Hammamet et du golfe de Tunis. La population totale...
Tipo: Journal Contribution
Palavras-chave: Shrimp culture; Length; Growth.
Ano: 2013
URL: http://hdl.handle.net/1834/5920

Wachstumsraten in Gefangenschaft gehaltener Meeresschildkröten.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Kaufmann, R.
Se informa sobre la cria y crecimiento de Tortugas marinas en estado juvenile. Caretta, Eretmochelys y también Chelonia crecieron mucho más rápido durante los primeros cinco meses que lo observado hasta ahora  en las regiones no tropicales. Se continua con las investigaciones y se examinan las posibilidades del establecimiento de criaderos en la costa atlántica colombiana.
Tipo: Journal Contribution
Palavras-chave: Growth; Breeding; Turtle culture; Growth; Turtle culture; Breeding; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_8022; Http://aims.fao.org/aos/agrovoc/c_49902.
Ano: 1967
URL: http://hdl.handle.net/1834/3285

Influencia del tiempo de conservación por liofilización en cepas del género penicillium de utilidad en la industria alimenticia
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Godínez, S.; Calderón, M.
Se realizó la evaluación de 10 cepas de hongos filamentosos pertenecientes a la especie Penicillium camemberti de utilidad en la elaboración de quesos Camembert y conservadas por liofilización entre 10 y 20 años en un banco de cepas. El estudio comprendió la determinación de porcentaje de retención de viabilidad, crecimiento en medio sólido, características macromorfológicas, características micromorfológicas, capacidad proteolítica y lipolítica. Los resultados mostraron que el empleo de este método aseguró una supervivencia de 100 % de las cepas, no detectándose alteraciones en sus características macromorfológicas y micromorfológicas. Los cultivos mantuvieron sus características de crecimiento y actividad enzimática.
Tipo: Journal Contribution
Palavras-chave: Growth; Growth; Enzyme activity; Viability.
Ano: 2008
URL: http://hdl.handle.net/1834/4842

Diferencias entre parámetros vitales de las poblaciones bonaerense y patagónica de anchoíta argentina.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Hansen, J.E.
Two pelagic cruises were carried out by R/V"Cap.Oca Balda" in the spring of 1988 and the following summer. Anchovy samples were taken in order to increase the knowledge on the differences between two main stocks of the species, inhabiting the Argentine Sea from 35°S southwards, with distributional boundary situated at about 41°S. Length-weight relationships were statistically different among populations. Weight-at-length values calculated for the summer cruise were higher tha sprin estimates, and they were also higher within Northern individuals. The differences were not statistically significant between stocks, but there are reasons to believe that if ages 1 and 6 of both stocks had been represented those differences would have been increased. Mortality...
Tipo: Journal Contribution
Palavras-chave: Length-weight relationships; Growth; Mortality; Size distribution; Growth; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1994
URL: http://hdl.handle.net/1834/1933

Crecimiento de Scenedesmus quadricauda en  efluentes cloacales de la ciudad de Trelew, Chubut, Argentina
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Albarracín, I.; Méndez, L.; Cravero, M.; Salomón, R.
La creciente problemática frente al tratamiento de aguas residuales y su posible reuso, ha planteado sistemas biológicos que remuevan los contaminantes manteniendo el ecosistema y disminuyendo costos. Este trabajo consiste en un ensayo de biorremediación, evaluando la tasa de crecimiento de Scenedesmus quadricauda cultivada en efluentes domiciliarios de la ciudad de Trelew, Chubut, Argentina. Diariamente se determina conductividad, pH y densidad celular. Al inicio y al final del ensayo se obtienen valores para fosfato, fósforo total, sulfuro, amoníaco, nitrito, nitrato, detergentes, DBO5, DQO y número más probable de coliformes totales y fecales. Se observa una disminución en amoníaco, fósforo, fósforo total, DBO5 y DQO, lo que confirma la efectividad en...
Tipo: Journal Contribution
Palavras-chave: Growth.
Ano: 2011
URL: http://hdl.handle.net/1834/4146

Comparación mediante el empleo de los caracteres merísticos y el crecimiento de caballas originarias de varias regiones geográficas (Cataluña, Islas Canarias y Sudamerica)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Perrotta, R.G.
Mackerel from SW Atlantic (22° -39°S) and the coast of Cataluña (42° 30'N) were compared by analizing both morphometric and meristic characters. A multivariate analysis, i.e. principal components was used. The growth curves corresponding to mackerels from different regions (Canarias, North of Chile, Mar del Plata and Rincón in Argentine) were also compared, as well as the mean length at ages 1 and 2 (Mar del Plata- Cataluña, Rincón- Cataluña). Significant differences in the growth were found between two groups. The first group was integrated by three SW Atlantic population (Brasil, Mar del Plata, Rincón), which possible conform a subspecies of Scomber japonicus. The second one was represented by the coastal mackerel off Cataluña.
Tipo: Journal Contribution
Palavras-chave: Morphometry; Meristic counts; Growth; Multivariate analysis; Growth; Multivariate analysis; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_28921.
Ano: 1993
URL: http://hdl.handle.net/1834/2570

Estimación de parámetros poblacionales del efectivo de sardina fueguina (Sprattus fuegensis) de la costa continental Argentina.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Hansen, J.E.
Patagonian sprat is probably the only pelagic fish species having a considerable biomass within the Argentine Seasouth of 45ºS. There are two populations, the first inhabiting mainly the coastal region around Malvinas Islands and the other close to the coast off Santa Cruz and Tierra del Fuego Provinces, including the fuegian channels. Some results of two seasonal (autumn and spring) patagonian sprat assessment surveys carried out during 1996 are shown. The autumn cruise covered the area between 50° and 55°S, from the continental coast up to 60 m depth, whereas the spring survey extended upto 90 m depth including Le Maire Strait and part of the Beagle Channel. During both seasons, in waters ranging 6.2 - 8.8°C temperature, the species distributed very...
Tipo: Journal Contribution
Palavras-chave: Fishery surveys; Length-weight relationships; Sexual maturity; Growth; Mortality; Growth; Sexual maturity; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999
URL: http://hdl.handle.net/1834/2530

La croissance du rouget rouge (Mullus surmuletus, l, 1758)  dans le golfe de Gabès
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Jabeur, Ch.; Missaoui, H.; Gharbi, H.; El Abed, A.
L’étude de la croissance du rouget de roche Mullus surmuletus dans le golfe de Gabès, basée sur la lecture de 478 otolithes d’individus provenant essentiellement de la pêche côtière et partiellement du chalutage benthique , a permis d’estimer les paramètres de croissance de cette espèce selon le modèle de Von Bertalanffy. La clé âge-longueur a été établie et les courbes de croissance en longueur et pondérale ont été tracées séparément pour les mâles, les femelles et sexes confondus. Sans différenciation de sexe, la longueur asymptotique est estimée à 223 mm, le coefficient K à 0.344 an -1 et l’âge théorique T0 à –0.79. Les relations Longueur-Poids ont été également établies séparément pour les mâles et les femelles. Dans la gamme des tailles étudiées, la...
Tipo: Journal Contribution
Palavras-chave: Otolith reading; Growth; Age determination; Mullet fisheries; Mullus surmuletus; Http://aims.fao.org/aos/agrovoc/c_43348.
Ano: 2000
URL: http://hdl.handle.net/1834/4295

Variación temporal de la abundancia de huevos y larvas de Engraulis anchoita en el litoral norpatagónico entre enero y abril de 2001. Crecimiento y mortalidad larval
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Brown, D.R.; Leonarduzzi, E.; Averbuj, A.; Livore, J.P.
Argentine anchovy (Engraulis anchoita) eggs and larvae abundance distribution patterns in the Argentine northpatagonian littoral during January-April 2001 were analyzed. As the season progressed, a process of decline in the reproductive activity was observed. Larval growth and mortality rates were established. Age determinations were performed analyzing otoliths daily increments. The 0.43 mm day-1 growth rate average did not show space-time differences, fact attributed to the homogeneity of the thermal field. The 0.32 d-1 January natural mortality rate was determined by exponential decline. Mortality rates, estimated with the mortality-aggregation model, were considered dependent on the larval size. The value ranges (d-1) were 0.07-0.49, 0.05-0.61 and...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Growth; Otoliths; Mortality.
Ano: 2013
URL: http://hdl.handle.net/1834/5500

Parámetros biológicos relevantes para las pesquerías de anchoíta argentina (Engraulis anchoita). Estimaciones resultantes de reunir datos de campañas de investigación (1993 a 2008) y de muestras de capturas comerciales (1986 a 2009)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Hansen, J.E.
The aim of this paper was to accurately estimate population parameters of northern (“bonaerensis”, latitude &lt; 41° S) and southern (“patagonic”, latitude 41° S) Argentine anchovy stocks and to describe some aspects of their behaviour. The research surveys allowed to obtain data on length, total weight, sex, maturity and age of 27,853 specimens of the northern and 12,787 of the southern stocks. Besides, 20,717 age determinations stemmed from commercial landing samplings of the northern stock were established. Sex proportion in the northern population was 0.50 : 0.50; the southern showed a slight predominance of males (0.52 : 0.48). Data derived from cruises and commercial landings showed statistical differences in the growth ratio of the northern stock...
Tipo: Journal Contribution
Palavras-chave: Pelagic fisheries; Stocks; Population characteristics; Growth; Natural mortality; Sexual maturity; Engraulis anchoita; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4884

Cultivo experimental de dos esponjas marinas en condiciones de laboratorio
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Sánchez-M., H.
Dos especies de esponjas, Desmapsamma anchorata (Cárter. 1882) y Aplysina fistularis insularis (Duch. y Mich., 1864) fueron observadas y recolectadas en la región de Santa Marta (Caribe colombiano). Dichas esponjas presentan características especiales como un rápido crecimiento de fijación en la primera y reproducción asexual por gemación en la segunda. Estos procesos fueron aprovechados para cultivarlas sobre portaobjetos y paralelamente observar su comportamiento en condiciones de laboratorio y a diferentes exposiciones de luz.
Tipo: Journal Contribution
Palavras-chave: Sponges; Growth; Asexual reproduction; Growth; Asexual reproduction; Sponges; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_664; Http://aims.fao.org/aos/agrovoc/c_7321.
Ano: 1984
URL: http://hdl.handle.net/1834/4030

Muestreo de desembarque de caballa (Scomber japonicus) en el puerto de Mar del Plata, período noviembre 2003-diciembre 2004 y resultados de la campaña de estimación de la biomasa de diciembre de 2004
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Perrotta, R.G.; Garciarena, A.D.; Madirolas, A.; Cabreira, A.
Chub mackerel (Scomber japonicus) landings corresponding to November 2003-January 2004 and November 2004-January 2005 fishing seasons were analyzed at the Mar del Plata port (Argentina, SW Atlantic). Fourty one samples were taken to measure total length exclusively and 4 sub-samples to record individual data (total length, weight, sex, sexual stage, age according to otoliths reading). Total length ranged 20-50 cm (1 and 8 years old). The most abundant sizes, between 32-37 cm, corresponded to ages 3 and 4, respectively. Most of the fish caught were adult (95%) and mature (85%) specimens. Length-weight, length-age relations were calculated and length-growth, weight-growth parameters estimated. The catch per unit of effort, of high variability (0-2,455 kg...
Tipo: Journal Contribution
Palavras-chave: Landing statistics; Biological sampling; Growth; Fishing effort; Echo surveys; Biomass; Growth; Biomass; Fishing effort; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24027.
Ano: 2009
URL: http://hdl.handle.net/1834/3455

Wachstumsraten in Gefangenschaft gehaltener Meeresschildkröten.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Kaufmann, R.
Se informa sobre la cria y crecimiento de Tortugas marinas en estado juvenile. Caretta, Eretmochelys y también Chelonia crecieron mucho más rápido durante los primeros cinco meses que lo observado hasta ahora  en las regiones no tropicales. Se continua con las investigaciones y se examinan las posibilidades del establecimiento de criaderos en la costa atlántica colombiana.
Tipo: Journal Contribution
Palavras-chave: Growth; Breeding; Turtle culture; Growth; Turtle culture; Breeding.
Ano: 1967
URL: http://hdl.handle.net/1834/3285

Crecimiento y desempeño general de juveniles silvestres de mero guasa Epinephelus itajara (Lichtenstein) Mantenidos en jaulas flotantes bajo diferentes condiciones de cultivo
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Botero, J.; Ospina, J.F.
An experimental culture trial of wild juveniles of jewfish Epinephelus itajara was conducted in two different places in the north coast of Colombia in order to evaluate the growth rate of the species and its tolerance to captivity conditions. Two different groups of fish were evaluated in each place, one fed on an artificial diet and the other on trash fish. All fish were held in floating cages for periods ranging from 63 to 89 days. Results showed excellent individual daily weight increase (6,83 and 12,4 g/day) and specific growth rate (1,4 y 0,96 %/day) for fish fed on trash fish in both places but conversion ratio was too high and inadequate (9,01 and 9,97). Trials with the artificial diet gave negative results because the fish didn’t accept the pellets...
Tipo: Journal Contribution
Palavras-chave: Experimental culture; Floating cages; Growth; Growth; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 2003
URL: http://hdl.handle.net/1834/3072

Influencia ambiental en la distribución espacial de las clases de edad de pez palo (Percophis brasiliensis) en el Sistema Costero del Atlántico Sudoccidental (34°-41° S)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Barretto, A.C.
The age-class distribution of the Brazilian flathead Percophis brasiliensis in relation to environmental variables in spring and winter, and the growth of both sexes, were studied in the SW Atlantic Coastal System (SACS)(34°S-31° S). Growth was studied from 1449 individuals (n=853, spring (1998 + 2000), n=596, winter (2004)) to which size (TL), sex, and age were determined. Age was determined considering that an opaque plus a hyaline band (present in the transverse section of the sagitta otolith) represented 1 year of life. The age-class distribution in spring and winter was established through hierarchical clustering and non-metric multi-dimensional scaling (nMDS analysis). This analysis grouped sampling stations (n=109, spring 1998; n=160, winter 2004)...
Tipo: Theses and Dissertations
Palavras-chave: Age groups; Age composition; Environmental factors; Geographical distribution; Population structure; Growth; Environmental effects; Coastal waters; Age composition; Environmental factors; Geographical distribution; Population structure; Growth; Age groups; Coastal waters; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_2594; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_28628; Http://aims.fao.org/aos/agrovoc/c_25205.
Ano: 2007
URL: http://hdl.handle.net/1834/3017

Crecimiento del abanico de mar Gorgonia ventalina (Linnaeus, 1758) (Cnidaria: Gorgoniidae) en el área de Santa Marta, Caribe colombiano
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Manrique Rodríguez, N.; Bejarano Chavarro, S.; Garzón Ferreira, J.
As a contribution to the biological knowledge about the sea fan Gorgonia ventalina and the use of this information as a tool to generate conservation and management strategies for this threatened species, a study about its annual growth rate, in different reef areas in Santa Marta and the National Natural Park Tayrona in the Colombian Caribbean took place. Manual measurements of 35 colonies were analyzed and images of 11 colonies were recorded in the beginning and in the end of the field stage. The annual growth rate varies among colonies and areas where measurements were taken. The average annual growth rate obtained with both of the methods was high and oscillated between 7.6 and 8.1 cm/year in height and between 6.9 and 8.3 cm/year wide. The total area...
Tipo: Journal Contribution
Palavras-chave: Growth; Population characteristics; Population structure; Growth; Population structure; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6115.
Ano: 2006
URL: http://hdl.handle.net/1834/1981

Evaluación del crecimiento de Pargo Canane Ocyurus chrysurus y Biajaiba Lutjanus synagris cultivadas en jaulas flotantes en la costa de Lerma, Campeche, México
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: García Torcuato, R.; Cervantes Trujano, M.; Ancona Ordaz, A.
Among the marine species more quoted in the coasts of Campeche in the Gulf of Mexico, we can found the pargo canane (Ocyurus chrysurus) and the biajaiba (Lutjanus synagris), that have a great demand in the national and regional market. In the installations of the Technological Institute of Lerma, has developed growing of O. chrysurus and L. synagris in floating cages, until this moment growing of these specie has been never carried out. In this work we carried out an evaluation of the growth of O. chrysurus and L. synagris at three different culture densities, in floating cages with volume of 1.5 m3. We conclude that O. chrysurus presents a greater growth rate for length and biomass (27.6 and 99.28%) with regard to L. synagris (18.99 and 76.81). The growth...
Tipo: Proceedings Paper
Palavras-chave: Marine aquaculture; Cage culture; Growth; Cage culture; Growth; Http://aims.fao.org/aos/agrovoc/c_25190; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 2006
URL: http://hdl.handle.net/1834/2074

Caractérisation et variation phénotypique et biologique des deux sexes du sandre "Sander lucioperca" (l., 1758) (teleosteen, percidae) dans la retenue de barrage de Nebhana (Tunisie Centrale).
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Turki, O.; M'Hetli, M.; Chriki, A.; Kraiem, M.M.
Dans le but de caractériser phénotypiquement et biologiquement la population de sandre (Sander lucioperca (L, 1758)), et de détecter une éventuelle variabilité entre les sexes, une étude des variables méristiques et morphométriques ainsi que la croissance, a concerné 133 mâles et 166 femelles issus de la retenue de barrage de Nebhana. Le choix des variables méristiques et morphométriques a été décelé à partir de travaux bibliographiques montrant un taux important de variabilité chez les poissons marins et d'eau douce. Ainsi 9 caractères méristiques et 23 variables morphométriques ont été retenus. Les résultats ont montré une invariance des caractères méristiques entre les mâles et les femelles. Quant aux rapports morphométriques, les mâles diffèrent des...
Tipo: Journal Contribution
Palavras-chave: Animal morphology; Biological data; Cell differentiation; Comparative studies; Freshwater fish; Growth; Meristic counts; Morphometry; Phenotypes; Phenotypic variations; Population structure; Water reservoirs; Sex; Sex characters; Marine fisheries; Pike perch.
Ano: 2009
URL: http://hdl.handle.net/1834/4748

Estudio de algunos aspectos del ciclo vital de la merluza de cola Macruronus magellanicus, Lonnberg, 1907.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Giussi, A.R.
Long tailed hake Macruronus magellanicus, is a demersal fish,distributed in the SW Atlantic Ocean, in Malvinas Current waters,from 36° and 55°S, mainly between 50m and 200m depth. The species is also distributed in Chilenian waters in the Pacific Ocean, being caught in the Magellan Strait and the Beagle Channel. Age determination was estimated with the sagittae otoliths, in which only one ring is formed during the year. Growth parameters were calculated directly and with back calculated methodology, no differences were observed between the results. Differences in growth sexes were evident from 3 years old. The oldest age observed was 13. Different distributional areas of adults through out the year could suggest a migratory movement in northern waters of...
Tipo: Theses and Dissertations
Palavras-chave: Life cycle; Growth; Otoliths; Age determination; Reproduction; Population dynamics; Mortality; Population structure; Fishery surveys; Fishing grounds; Geographical distribution; Back calculation; Growth; Otoliths; Age determination; Population structure; Geographical distribution; Life cycle; Reproduction; Population dynamics; Mortality; Fishing grounds; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_4317; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_6111; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_2947.
Ano: 1996
URL: http://hdl.handle.net/1834/1488

Ecología y conservación de los grandes tiburones costeros de Bahía Anegada, provincia de Buenos Aires, Argentina.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Lucifora, L.O.
Reproduction, age, growth, feeding habits and population dynamics of four large temperate sharks (sand tiger shark Carcharias taurus, school shark Galeorhinus galeus, copper shark Carcharhinus brachyurus, and broadnose sevengill shark Notorynchus cepedianus) were studied in Anegada Bay (between 39°50' and 40°40'S), Argentina. Data were gathered from 1089 individuals examined during a three-year study period. Age and growth were studied through examination of vertebral centra only in the first three species. Population dynamics was modeled through stage matrix population models. Most sand tiger sharks examined were adults and evidence indicates that they use the study area as a mating ground. Sand tiger males mature at 193 and females at 223 cm total length...
Tipo: Theses and Dissertations
Palavras-chave: Reproductive behaviour; Feeding behaviour; Age; Growth; Exploitation; Shark fisheries; Reproductive behaviour; Feeding behaviour; Growth; Age; Http://aims.fao.org/aos/agrovoc/c_37902; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 2003
URL: http://hdl.handle.net/1834/1441

Crecimiento de scenedesmus quadricauda en efluentes cloacales de la ciudad de Trelew, Chubut, Argentina
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Méndez Suaza, L.; Albarracín, I.; Cravero, M.; Salomón, R.
La creciente problemática frente al tratamiento de aguas residuales y su posible reuso ha planteado sistemas biológicos que remuevan los contaminantes manteniendo el ecosistema y disminuyendo costos. Este trabajo consiste en un ensayo de biorremediación evaluando la tasa de crecimiento de Scenedesmus quadricauda cultivada en efluentes domiciliarios de la ciudad de Trelew, Chubut, Argentina. Diariamente se determina conductividad, pH y densidad celular. Al inicio y al final de ensayo se obtienen valores para fosfato, fósforo total, sulfuro, amoníaco, nitrito, nitrato, detergentes, DBO5, DQO y número más probable de coliformes totales y fecales. Se observa una disminución en amoníaco, fósforo, fósforo total, DBO5 y DQO lo que confirma la efectividad en la...
Tipo: Preprint
Palavras-chave: Growth; Waste water; Water purification; Growth; Waste water; Water purification; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_24927; Http://aims.fao.org/aos/agrovoc/c_34145.
Ano: 2010
URL: http://hdl.handle.net/1834/3639

Variabilidad Temporal De Los Parámetros Poblacionales De La Langosta Espinosa Del Caribe [Panulirus argus] (Latreille, 1804) En Aguas De Cuba
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: de León González, María Estela.
ABSTRACT Temporal variability in the population parameters of the Caribbean spiny lobster Panulirus argus (Latreille, 1804) in Cuban waters Modifications in life-history traits are often concomitant with prolonged periods of exploitation or changes in the environment, producing changes in population abundance. . Both of them act as selective forces and could affect population parameters behaviour like growth rate, reproduction output, natural mortality rate and size at first maturity. Because of the economic importance of Caribbean spiny lobster (Panulirus argus) for Cuba and other countries of western central Atlantic, it is necessary to make a careful study in its life cycle processes and changes happened in temporal scale. Data used were obtained from...
Tipo: Theses and Dissertations
Palavras-chave: Growth; Natural mortality; Lobster culture; Growth; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 2005
URL: http://hdl.handle.net/1834/1564

Influencia del tiempo de conservación por liofilización en cepas del género penicillium de utilidad en la industria alimenticia
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Godínez, S.; Calderón, M.
Se realizó la evaluación de 10 cepas de hongos filamentosos pertenecientes a la especie Penicillium camemberti de utilidad en la elaboración de quesos Camembert y conservadas por liofilización entre 10 y 20 años en un banco de cepas. El estudio comprendió la determinación del porcentaje de retención de viabilidad, crecimiento en medio sólido, características macromorfológicas, características micromorfológicas, capacidad proteolítica y lipolítica. Los resultados mostraron que el empleo de este método aseguró una supervivencia de 100 % de las cepas, no detectándose alteraciones en sus características macromorfológicas y micromorfológicas. Los cultivos mantuvieron sus características de crecimiento y actividad enzimática.
Tipo: Journal Contribution
Palavras-chave: Growth; Enzyme activity.
Ano: 2008
URL: http://hdl.handle.net/1834/4725

Age et croîssance du chinchard à quelque jaune (trachurus méditerraneus) dans la région nord de la Tunisie
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Fezzani Serbaji, S.; Chemmam-A, B.; Ben Salem, M.
Le chinchard à queue jaune est un Carangidae qui fait l’objet d’une exploitation par les différents types de pêche le long des côtes tunisiennes. Dans le présent travail on se propose d’étudier l’âge et la croissance sur la base de la distribution des fréquences de taille dans la région Nord de la Tunisie. La décomposition de ces fréquences de taille est réalisée suivant la méthode de Battacharya (1967). Deux périodes sont considérées, la première correspond à l’année 1998 et la seconde s’étale entre Novembre -1999 et Décembre -2000. Pour la première période, 6 classes d’âges ont pu être identifiées alors que pour la seconde cette valeur est de 7. Les équations de croissance linéaire annuelle suivant le modèle Von Bertalanffy (1938) ont été établies.
Tipo: Journal Contribution
Palavras-chave: Trachurus mediterraneus; Age; Age composition; Frequency; Growth; Population structure; Size distribution; Horse mackerel fisheries; Age composition; Growth; Population structure; Age; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 2006
URL: http://hdl.handle.net/1834/4276

Length - weight relationship and condition factor of Phycis phycis (Linnaeus, 1766) and Phycis blennoides (Brünnich, 1768) [Actinopterygii, Gadiform, Phycidae] in the Gulf of Tunis
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Romdhani, A.; Ktari, M. H.; Mahé, K.
In our study length-weight relationship are presented for 213 Phycis phycis and 270 Phycis blennoides caught between September 2007 and August 2008 and collected from trawler fishing in the Gulf of Tunis. The lengthweight relationships and the condition factor were computed separately for sexes and for different seasons. The parameters of the length-weight relationship for the population as a whole are all well correlated (r2 &gt; 0.92, p &lt;0.001). The type of growth is isometric for P. phycis while it is majorant allometry for P. blennoides. The comparison of the regression of the weight according to the total length of males and females, of the two species, shows that the growth is therefore identical. The study of seasonal variations indicates that...
Tipo: Journal Contribution
Palavras-chave: Length-weight relationships; Growth; Condition factor.
Ano: 2013
URL: http://hdl.handle.net/1834/5919

Poliploidia en moluscos de importancia comercial (almeja catarina Argopecten ventricosus Sowerby ii, 1842; almeja mano de leon Nodipecten subnodosus Sowerby 1835; y abulón rojo Haliotis rufescens Swainson 1822)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Maldonado, R.
La poliploidía ha sido una de las biotecnologías más empleadas en la ultima década para el mejoramiento genético de moluscos bivalvos por ser una de las mejores alternativas a corto plazo para incrementar la producción. Los organismos triploides presentan tres juegos completos de cromosomas homólogos que afectan la sinapsis, lo cual da como resultado una esterilidad parcial o total, la cual teóricamente repercute favorablemente en el crecimiento. Sin embargo, la inducción a la triploidía presenta algunos problemas que podrían resolverse con la disponibilidad de tetraploides para producir triploides biológicos. En este trabajo se presentan los resultados del desarrollo de biotecnologías de poliploidía en tres especies de moluscos nativos al noroeste de...
Tipo: Theses and Dissertations
Palavras-chave: 968; Marine molluscs; Genetics; Growth; Genetics; Growth; Http://aims.fao.org/aos/agrovoc/c_3222; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 2003
URL: http://hdl.handle.net/1834/3431

Análisis del crecimiento y la mortalidad de Anisotremus interruptus (Gill) (Perciformes: Haemulidae) en la Costa de Colima, México
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Espino-Barr, E.; Gallardo-Cabello, M.; González-Orozco, F.
This paper deals with the growth and mortality analysis of the burrito grunt Anisotremus interruptus on the coast of Colima, México. The estimated growth parameters are: L ¥ = 50.59 cm; W ¥ = 5,051.04 g; k = 0.147 years-1; to = -0.916 years; A0.95 = 19.46 years. Most of the growth occurred during the first year of life, when the grunt grows 12.52 cm, the second year it grows 4.95 cm and the third, 4.60 cm. The highest value of the condition index took place between February and September. The total mortality rate (Z) was calculated as 0.53 years-1. These values are basic for the plan of administration of the fishery of this species.
Tipo: Journal Contribution
Palavras-chave: Growth; Mortality; Growth; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 2004
URL: http://hdl.handle.net/1834/3060

Estudio preliminar sobre la estructura de edades y el crecimiento de la pescadilla de red (Cynoscion guatucupa, Pisces, Sciaenidae) en el área sur de la provincia de Buenos Aires
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ruarte, C.O.; Sáez, M.B.
Otoliths reading of specimens derived from research cruises carried out in the south of the Province of Buenos Aires (39°S-41°S), Argentine Sea, in 1998 and 1999 allowed to determine stripped weakfish (Cynoscion guatucupa, Pisces, Sciaenidae) age and growth.
Tipo: Journal Contribution
Palavras-chave: Age determination; Growth; Otoliths; Age determination; Growth; Otoliths; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091.
Ano: 2008
URL: http://hdl.handle.net/1834/3144

Modeling laboratory culture of Gracilaria verrucosa (Hudson) Papenfuss according to nutrients concentrations and salinities levels
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mensi, F.; Ksouri, J.; Seale, E. G.; Romdhane, M.S.
L'exploitation des algues rouges appartenant au genre Gracilaria pour l'extraction de l'agar a considérablement augmenté au cours des dernières décennies. En Tunisie Gracilaria verrucosa (Hudson) Papenfuss 1950 (Rhodophyta), est candidate pour la culture dans la lagune de Bizerte (Nord de la Tunisie) où ne pousse que sur une courte période de l’année. Ainsi, le but de cette étude est de recueillir des informations de base sur sa croissance dans cette région. Les effets de la salinité des sources d’azote et du phosphore ainsi que leurs concentrations sur la croissance de cette algue ont été étudiés à l'échelle de laboratoire en utilisant la méthodologie de surface des réponses. Afin de déterminer les interactions entre les variables et les niveaux optimaux...
Tipo: Journal Contribution
Palavras-chave: Algae; Ammonium; Red algae; Salinity; Growth; Nitrates.
Ano: 2011
URL: http://hdl.handle.net/1834/4734

Requerimientos de proteína en subjuveniles de Tortuga Carey (Eretmochelys imbricata)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Pelegrín, E.; Álvarez, J.S.; Fraga, I.; Galindo, J.
Se evaluó el efecto de dietas isocalóricas e isolipídicas que contenían 45, 47, 49, 51, 53 y 55% de proteína sobre el crecimiento y supervivencia de subjuveniles de tortuga carey (Eretmochelys imbricata). Se desarrolló un diseño experimental completamente aleatorizado durante 68 días en condiciones controladas de laboratorio y se utilizaron ejemplares con peso promedio inicial de 76 g. Los mayores crecimientos en peso se obtuvieron con las dietas que contenían 49 y 51% de proteína, lográndose crecimientos diarios de 2.8 g. El factor de conversión del alimento varió entre 1.98 y 2.68 y los mayores valores de eficiencia proteica lo alcanzaron los ejemplares que obtuvieron los mayores crecimientos. Se recomienda el empleo de piensos que contengan 49-51% de...
Tipo: Journal Contribution
Palavras-chave: Proteins; Diets; Growth; Growth; Proteins; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6259.
Ano: 2003
URL: http://hdl.handle.net/1834/3710

Estudios sobre la edad y crecimiento de la Palma Calamus brachysomus (Lockington) (Pisces: Sparidae) en aguas ecuatorianas
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Martínez, J.
342 specimens of sparid Calamus brachysomus ”Palma”, collected during a demersal trawl survey by the R. V. Tohallí in April and May1983, were examined. The different techniques used to prepare scales and otoliths for ageing are described and analysed. The otoliths were determined to be the most reliable for ageing studies; 87% of otoliths were readable. The rings observed were assumed to be annual. The mean lengths at age were used to determine the parameters of the Von Bertalanffy growth formula, giving: Lt=50.13(1-e-0.1473(t+2.0704)). The growth curve obtained must be considered provisional due to possible biases in the interpretation of the otoliths, and also due to those arising from the selectivity of the fishing gear.
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Age; Growth; Growth curves; Otoliths; Otolith reading; Demersal fisheries; Growth; Otoliths; Age; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 1985
URL: http://hdl.handle.net/1834/3226

Growth And Moulting Of Captive Panulirus Homarus Homarus In Kenya, Western Indian Ocean.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mavuti, K.M.; Kulmiye, A.J.
Panulirus homarus homarus is the most widely distributed among the three P. homarus subspecies and is the second most important spiny lobster in the Kenyan lobster fishery after P. ornatus. Growth and moulting of lobsters, held in concrete tanks with a flow-through seawater supply and at ambient temperatures, were monitored for 18 months (October, 2001 - March, 2003). Both moult increment and moulting frequency were inversely correlated with size. Mean moult increment ranged from 4mm in the 36-45 mm CL size class to 0.6 mm in the 86-95 mm CL size class. Mean intermoult period increased from 49 days in the 46-55 mm CL size class to 81 days in the 86-95 mm CL size class. Growth rates were 19% and 46% higher for males and females, respectively during the...
Tipo: Conference Material
Palavras-chave: Panuliris homarus homarus; Injury; Growth; Moulting; Kenya; Lobster fisheries.
Ano: 2004
URL: http://hdl.handle.net/1834/723

Estimación de la edad, el crecimiento y la mortalidad natural de la merluza de cola (Macruronus magellanicus) en el océano Atlántico sudoccidental durante el verano de 2010
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Zavatteri, A.; Abachian, V.E.; Giussi, A.R.; Di Leva, I.V.
Estimate of age, growth and natural mortality of longtail hake (Macruronus magellanicus) in the Southwest Atlantic Ocean during summer 2010. Longtail hake (Macurornus magellanicus) total length (TL) and weight (W) growth parameters were estimated and age structure and natural instantaneous mortality coefficient (M) analyzed. Data were obtained within the framework of the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) “Observers on Board of Commercial Vessels” Subprogramme. The information, derived from the area comprised between 46° S-54° S, was collected during the February-April 2010 period. Sagittae otoliths reading of 5,034 individuals (2,429 males and 2,605 females) between 28-99 cm TL was performed. The maximum ages observed in...
Tipo: Journal Contribution
Palavras-chave: Age determination; Growth; Natural mortality.
Ano: 2013
URL: http://hdl.handle.net/1834/5504

Crecimiento y supervivencia de larvas de Argopecten nucleus alimentadas con diferentes dietas microalgales
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Acosta Ortiz, Ernesto; Carreño-Hernández, Yenia Katerine; Gómez León, Javier.
Se estudió la influencia que ejerce la dieta sobre el desarrollo larvario del pectínido Argopecten nucleus, probando seis dietas microalgales compuestas por dietas monoalgales y mezcla de las especies Isochrysis galbana, Chaetoceros calcitrans y Tetraselmis suecica en relación 1:1, manejando una concentración por mL equivalente al peso de 40000 células de I. galbana, midiendo la respuesta a través de las variables supervivencia, crecimiento, aparición de la mancha ocular y estado de condición (larvas llenas, semillenas y vacías). Las dietas que contenían I. galbana presentaron los mayores valores en cada una de las variables medidas, en comparación con aquellas que carecían de esta. Particularmente, la dieta mixta I. galbana + C. calcitrans presentó...
Tipo: Journal Contribution
Palavras-chave: Molluscan larvae; Feeding experiments; Marine molluscs; Growth; Survival.
Ano: 2012
URL: http://hdl.handle.net/1834/4434

Etude diagnostic de la pêcherie de mulets sur la grande côte du Sénégal
Provedor de dados: Ocean Docs: e-repository of  publications
Tipo: Book
Palavras-chave: Mullet fisheries; Reproduction; Growth; Migrations; Ecology; Stocks; Landing statistics; Inland fisheries; Fishing gear; Exploitation; Canoe fisheries; Marketing; Artisanal fishing; Fishing licenses; Mesh regulations; Protected areas; Reef fisheries; Fishing effort.
Ano: 2009
URL: http://hdl.handle.net/1834/4578

Preliminary study of age, growth and birthdates of juvenile sardine &lt;Sardina pilchardus&gt; (Walbaum, 1792) and European anchovy Engraulis encrasicolus (Linnaeus, 1758) in the east coast of Tunisia
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Khemiri, S.; Gaamour, A.
The microstructures of the otoliths of juvenile sardines (Sardina pilchardus) and anchovies (Engraulis encrasicolus), collected in the East coast of Tunisia, were analyzed in order to estimate age, daily growth and hatch date. The fork length of sardines varied from 48 to 103 mm and estimated age ranged from 105 to 297 days. For the anchovies, the estimated age ranged from 79 to 300 days and the fork length from 42 to 86 mm. The length-age data of both species were fitted to the laird-Gompertz model. The corresponding growth equations were [lt=10.8 exp(2.74(1-exp(-0.006t)))] for sardines and [lt=3.1 exp(3.2(1-exp(-0.02t)))] for anchovies. The instantaneous growth rates of the juvenile of both species in the East of Tunisia were in agreement with the data...
Tipo: Journal Contribution
Palavras-chave: Age determination; Daily; Growth; Hatching; Microstructure; Otoliths; Population structure; Age determination; Growth; Otoliths; Population structure; Hatching; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_3504.
Ano: 2005
URL: http://hdl.handle.net/1834/3797

Relation entre la densite des microstries et le rayon de l'otolithe compatible avec le modele de von Bertanlanffy: application a Lutjanus sebae (Cuvier, 1828) aux Seychelles
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Chauvelon, P.; Bach, P.
The age study of fishes using daily growth increments DGI observations is made from: 1- either the exhaustive determination of increments, 2- or the calculation of daily growth increments density for different otolith zones between the nucleus and the margin edge of otolith, the width of increments being presumed constant for each zone. To apply the first method, increments may be readable individually from the nucleus to the margin edge of otolith. This is a very time consuming operation. It can cause miscalculation of increments and errors of the age estimation. The second method, called "DGI density method" is based on the decrease of the increment width in relation to the slowing down of the growth phenomena. The more used approach according to this...
Tipo: Report
Palavras-chave: LUTJANUS SEBAE; Age determination; Growth; Methodology; Otolith reading; Age determination; Growth; Methodology; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_12522.
Ano: 1994
URL: http://hdl.handle.net/1834/1315

Biologie de l'anchois (&lt;Engraulis encrasicolus&gt;) en Mauritanie
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ba, I.S.
L’étude du cycle sexuel de l’Anchois montre que la principale période de reproduction s’étend d’avril à octobre. Celle-ci serait sous la dépendance principale de l’élévation de la température de surface. La croissance, abordée à l’aide des marques supposées journalières sur les otolithes, donne des résultats jugés satisfaisants jusqu’à 10 cm L.F. Par contre, ceux concernant les tailles supérieures devront être confirmés.
Tipo: Journal Contribution
Palavras-chave: Biology; Growth; Otoliths; Sexual maturity; Sexual reproduction; Growth; Otoliths; Biology; Sexual maturity; Sexual reproduction; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_925; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_26876.
Ano: 1989
URL: http://hdl.handle.net/1834/1146

Untersuchungen über Wachstum und Altersverteilung einer Population des Grünen Leguans Iguana iguana iguana L. (Reptilia: Iguanidae)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Müller, H.
Una población de Iguanas verdes (Iguana iguana iguana L., = Iguana tuberculata Laur.) fue observada durante un año y el crecimiento de los animales controlado. Dependiendo de la longitud desde la cabeza hasta la cavidad anal fueron clasificados en grupos de diferentes tamaños. Según el aumento de su peso fue deducida la distribución de edad dentro de la población y la edad máxima de vida.
Tipo: Journal Contribution
Palavras-chave: Growth; Aquatic reptiles; Growth; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 1968
URL: http://hdl.handle.net/1834/3252

Age et croissance de &lt;Pagrus caeruleostictus&gt; (Valenciennes,1830) des côtes de Nouakchott
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Dia, M.; Ghorbel, M.; Kone, Y.; Bouaîn, A.
L’étude de la croissance de Pagrus caeruleostictus des côtes de Nouakchott (Mauritanie) a été réalisée par scalimétrie. L’analyse des variations mensuelles de l’allongement marginal (A.M.) a permis de montrer que la période d’apparition des anneaux d’arrêt de croissance est située en février. Par rétro-calcul, nous avons déterminé la longueur à la fourche (LF) à l’apparition de chaque anneau d’arrêt de croissance en utilisant la relation liant la longueur du poisson au rayon de l’écaille. L’application du modèle de Von Bertalanffy sur ces longueurs, a permis d’obtenir les paramètres de la croissance moyenne en longueur et en masse de l’espèce pour les 2 sexes pris séparément. Ce modèle s’applique bien à la croissance de ce poisson du fait que les valeurs...
Tipo: Journal Contribution
Palavras-chave: Scalimétrie; Age; Growth; Growth; Age; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 2001
URL: http://hdl.handle.net/1834/3687

Relation entre la densité des microstries et le rayon de l'otolithe compatible avec le modèle de von Bertanlanffy: application à Lutjanus sebae (Cuvier, 1828) aux Seychelles
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Bach, P.; Chauvelon, P.
Daily growth increments (DGI) density - otolith radius relationship according to the von Bertanlanffy's growth model: application to Lutjanus sebae (Cuvier, 1828) in Seychelles. Often, age determination of fishes is conducted from several parts (scales and otoliths for teleost fishes, vertebrae, spine, opercular bones, ...) displaying seasonal marks (annuli) associated with growth checks, which can be used for the estimation of individual age. Since Panella's (1971, 1974) discovery of the daily growth increments (DGI) in the teleost otoliths, age determination with DGI method has been used more and more on larval stages of both temperate and tropical species and juvenile and adult individuals of, principally, snapper and grouper species. The age study of...
Tipo: Report
Palavras-chave: Otolith reading; Age determination; Methodology; Growth; Lutjanus sebae.
Ano: 1993
URL: http://hdl.handle.net/1834/5119

Regulación denso-dependiente del crecimiento individual de la almeja púrpura (Amiantis purpurata, Lamarck 1818)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Pappalardo, M.P.; Morsan, E.M.
In this study we analyze growth, mortality and estimated biomass trend of purple clam, Amiantis purpurata, population placed in Playa Villarino, (Northern San Matias gulf, Argentina) in the southern most boundary of its geographical distribution. Previously, the population structure was described composed by three consecutive cohorts settled among 1978-1980, and the individual growth rate showed high spatial variability. The hypothesis to test in this study is that growth rate is regulated by local biomass. We choice four sites with different densities, to assess growth rate, natural mortality and retrospective estimated biomass trend. During February 2003, densities and growth rate (using external growth bands measurements) were analyzed matching with a...
Tipo: Journal Contribution
Palavras-chave: Growth rate; Clam fisheries; Mortality; Growth curves; Density dependence; Biomass; Growth; Biomass.
Ano: 2005
URL: http://hdl.handle.net/1834/4385

Dinámica de la metapoblación de almeja panopea Panopea abbreviata en los golfos norpatagónicos
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Zaidman, P.C.
Panopea abbreviata es el molusco bivalvo infaunal de mayor tamaño del Mar Argentino. Se distribuye desde Río de Janeiro (Brasil) hasta la Patagonia Argentina. En los golfos San Matías (GSM) y San José (GSJ), conforma una metapoblación que presenta una distribución discontinua, formada por una serie de poblaciones ubicadas a lo largo de las costas.Es el bivalvo más longevo explotado en el Atlántico Sur. En el GSM su pesquería comenzó en el año 2000 y, si bien la misma es incipiente, debido a las características biológico-poblacionales de P. abbreviata es un recurso que requiere de un manejo precautorio. Excepto por estudios preliminares sobre el crecimiento y el ciclo reproductivo, no se contaba con la información básica para manejo. El objetivo general del...
Tipo: Theses and Dissertations
Palavras-chave: Fishery biology; Marine molluscs; Population dynamics; Sustainable management; Age; Growth; Mortality rate; Recruitment; Population structure; Spatial variations; Sex composition; Reproductive cycle; Histology; Environmental conditions.
Ano: 2013
URL: http://hdl.handle.net/1834/5236

Pulpos octopódidos (Cephalopoda, Octopodidae).
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Re, M.E.
Four species of the family Octopodidae were reported to occur along the Argentine coast Octopus tehuelchus, Eledone massyae, Enteroctopus megalocyathus and Robsonella fontaniana. The first two are distributed from Brazil to south of Rawson and San Jorge Gulf, respectively, in warm-temperate waters. E.megalocyathus and R.fontaniana are of Subantarctic origin, the first ranging from San Matias Gulf to Magellan Strait, the Beagle Channel and Malvinas Islands; R.fontaniana is distributed from San Matias Gulf southwards, with records in North Patagonian and San Jorge Gulfs, Chile and Peru. A synopsis of information about taxonomical status, patterns of geographic distribution and biological aspects of these four coastal octopodids is given.
Tipo: Book Section
Palavras-chave: Animal morphology; Feeding; Geographical distribution; Growth; Life cycle; Parasites; Reproduction; Feeding; Geographical distribution; Growth; Animal morphology; Life cycle; Parasites; Reproduction; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_421; Http://aims.fao.org/aos/agrovoc/c_4317; Http://aims.fao.org/aos/agrovoc/c_5574; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 1998
URL: http://hdl.handle.net/1834/2583

Etude préliminaire de l'âge et de la croissance de l'espadon &lt;Xiphias gladius&gt; des eaux tunisiennes.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Hattour, A.; Gaamour, A.; Ben Smida, M.A.
Une clé préliminaire âge taille et âge poids est présentée à partir d’un échantillonnage mené sur 212 espadon (Xiphias gladius L.) pêchés le long des côtes tunisiennes entre mars et septembre 2004. les tailles des poissons sont rangées de 60 cm à 173 cm, correspondant à des poids variant de 1,5 kg à 55 kg. L’analyse des coupes de la 2ème épine de la nageoire anale des espadons échantillonnés ont révélé que les âges sont rangés entre 0 et 5 années.
Tipo: Journal Contribution
Palavras-chave: Tuna fisheries; Age; Composition; Weight; Growth; Cosmopolite species; Population structure; Size distribution; Growth; Population structure; Age; Weight; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_8349.
Ano: 2005
URL: http://hdl.handle.net/1834/1535

Presencia de tubos Calcáreos biogénicos en la estructura del coral Madracis myriaster (Scleractinia: Pocilloporidae) de aguas profundas en el Caribe colombiano.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: López, N.; Santodomingo, N.; Reyes, J.
A large number of branches from the scleractinian coral Madracis myriaster, collected in deep waters of the Colombian Caribbean, showed both inside and around the skeleton calcareous structures constructed by tubiculous organisms. Here, based on the growth strategy of the coral and the physical conditions of deep-water areas, we describe the functional effect of the tube structures on deep coral frameworks formation and growth.
Tipo: Journal Contribution
Palavras-chave: Deep water; Growth; Growth; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 2008
URL: http://hdl.handle.net/1834/3513

Age et croissance de Pagellus bellottii (Sparidae) des cotes Mauritaniennes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ould Yarba, L.; Ghorbel, M.; Bouain, A.
The red Pandora Pagellus bellottii is one of the most important demersal species in the fisheries of Mauritanian coasts. Several gears and fleet traditionally exploit it. The studies concerning this fish and particularly those of its age and growth are rare and haven't used the adequate method, which uses hard pieces like scale and vertebra. The objective of the present work is to contribute to the knowledge of the growth parameters of the red Pandora using the scales method not yet used in the studied area. To determine the age and to study the growth of Pagellus bellottii in Mauritanian coasts, we have used the scales of 544 individuals. We have taken, 8 scales under the fin pectoral and we have read the age using a binocular magnifying glass provided...
Tipo: Journal Contribution
Palavras-chave: Pagellus bellottii  Sparidae; Age; Age determination; Growth; Scale reading; Pagellus bellottii; Sparidae; Http://aims.fao.org/aos/agrovoc/c_43241; Http://aims.fao.org/aos/agrovoc/c_43233.
Ano: 2004
URL: http://hdl.handle.net/1834/4245

Wachstumsraten in Gefangenschaft gehaltener Meeresschildkröten. II.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Kaufmann, R.
Se comunican observaciones sobre el crecimiento de las tortugas marinas Caretta (Caguamo), Eretmochelys (Carey) y Chelonia (Tortuga Blanca), hasta una edad de 2 años. Fuera del aumento en longitud y peso, se discuten los cocientes de longitud contra anchura del caparazón, y de la longitud del caparazón contra el peso del cuerpo, en parte en comparación con poblaciones adultas.
Tipo: Journal Contribution
Palavras-chave: Aquatic reptiles; Growth; Turtle culture; Growth; Turtle culture; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_8022.
Ano: 1972
URL: http://hdl.handle.net/1834/3300

Ecologie et biologie de l'émissole lisse Mustelus mustelus (Linné, 1758) sur les côtes de Mauritanie
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Khallahi, B.
RESUME:  Les eaux océaniques mauritaniennes sont au carrefour d'eaux froides et salées provenant du Nord, et d'autres chaudes et moins salées du Sud. L'interaction de ces eaux est à l'origine d'un régime hydrologique à 4 saisons: une saison froide de janvier à mai, une saison de transition froide-chaude de juin à juillet, une saison chaude d'août à octobre et enfin une saison de transition chaude – froide de novembre à décembre. La présente étude met en relation ces variations hydrologiques saisonnières, la distribution et la biologie de Mustelus mustelus. La distribution spatiale et temporelle de M. mustelus sur le plateau continental mauritanien a été suivie en analysant les données récoltées au cours de 20 campagnes de prospections scientifiques, 13...
Tipo: Theses and Dissertations
Palavras-chave: Mauritania; Croissance; Biologie; Biology; Physical environment; Mauritanie; Ecology; Fecondity; Growth; Emissole lisse; Alimentation; Smouthound shark; Mustelus mustelus; Fécondité; Reproduction; Milieu physique; Écologie; Distribution; Shark fisheries.
Ano: 2004
URL: http://hdl.handle.net/1834/677

Crecimiento de juveniles de pargo palmero Lutjanus analis (Cuvier) en jaulas flotantes en Islas del Rosario, Caribe colombiano
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Botero, J.; Ospina, J.F.
An experimental culture trial of juveniles of mutton snapper Lutjanus analis was conducted in order to evaluate the growth potential of the species and its adaptability to culture conditions. The juveniles (N = 127) with an initial weight ranging between 125 and 178 g were held at a stocking density of 15.9 fish/m3 in a floating cage and fed on a commercial artificial diet of 45% protein for a period of 1 to 8 days. Results showed an individual daily weight increase of 3.16 g/ day and a specific growth rate of t .06 %/ day. Although, the food conversion ratio obtained with the artificial diet was high and inadequate (TCA = 3.53). During the culture period all fish showed great tolerance to handling stress and to water quality conditions in the cage (O2 =...
Tipo: Journal Contribution
Palavras-chave: Aquaculture; Floating cages; Growth; Growth; Aquaculture; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_550.
Ano: 2002
URL: http://hdl.handle.net/1834/3189

Biology and toxicity of the pufferfish Lagocephalus sceleratus (GMELIN, 1789) from  the Gulf of Suez
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: El-Ganainy, A. A.; Sabrah, M. M.; Zaky, M. A.
Some biological aspects of the pufferfish Lagocephalus sceleratus were studied and correlated with the toxicity of the fish. A sample of 176 fish with total lengths ranging from 18.5 to 78.5 cm were collected from commercial catches at the Attaka fishing harbor between October 2002 and June 2003. Length weight regression parameters for males, females and all individuals were estimated. Modal progression analysis output indicates ten distinct age groups. The parameters of the von Bertalanffy's growth model were L∞ = 81.1 cm and K = 0.26 per year. The overall sex ratio of males to females was 1: 1.3. The spawning takes place during summer and the size at which 50% of fishes are mature is 42.1 cm for males and 43.3 cm for females. Analysis of the diet...
Tipo: Journal Contribution
Palavras-chave: Environmental Studies; Reproduction; Toxicity; Growth; Fish; Toxicity; Growth; Reproduction; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 2006
URL: http://hdl.handle.net/1834/1452

Calamares omastréfidos (Cephalopoda, Ommastrephidae).
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Brunetti, N.E.; Ivanovic, M.L.; Elena, B.
An update of the knowledge on the three most important ommastrephid species that inhabit the SW Atlantic: Illex argentinus, Martialia hyadesi and Ommastrephes bartramii, is presented. Up to the moment, only I.argentinus was intensively studied. Its distribution, population structure, reproduction, growth and paralarval development are analyzed, togheter with other aspects of its biology, such as feeding, predators and parasites. Also its utilization for human consmption is considered. Regarding M.hyadesi and O.bartrami, information on their distribution and biology is presented.
Tipo: Book Section
Palavras-chave: Animal morphology; Geographical distribution; Reproduction; Fecundity; Growth; Feeding; Predators; Parasites; Population structure; Geographical distribution; Growth; Feeding; Predators; Population structure; Animal morphology; Reproduction; Fecundity; Parasites; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_6163; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_421; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_5574.
Ano: 1998
URL: http://hdl.handle.net/1834/2576

Estructura y regeneración del bosque de la Ciénaga de Chololón, Isla Barú, Parque Nacional Natural Corales del Rosario y San Bernardo, Caribe Colombiano
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Osorno Arango, A. M.; Valle, A. G.; Gil Agudelo, D. L.
Los manglares son ecosistemas que representan un enlace relevante en el ambiente de transición entre los medios marino y terrestre; poseen gran importancia a nivel biológico y socio-económico, siendo un ecosistema marino estratégico. A lo largo de la costa Caribe colombiana hay varias ciénagas o lagunas costeras en cuyo borde se han establecido diversos bosques de manglar, algunos de los cuales hasta el momento no cuentan con suficiente información cienífica que los describa a nivel cualitativo  y que represente sus procesos biológicos y los caracterice en forma cuantitativa. El presente trabjao de investigación contribuye al conocimiento actual de la estructura, distribución, abundancia y capacidad de regeración del bosque de manglar que circunda la...
Tipo: Journal Contribution
Palavras-chave: Mangroves; Structures; Density; Growth.
Ano: 2011
URL: http://hdl.handle.net/1834/4408

Succesional patterns on fouling plates in the Bay of Santa Marta, Colombian Caribbean
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: García, C.B.; Salzwedel, H.
Successional progress was followed ¡n fouling communities, developing under tropical conditions. Primary succession was simulated by immersing asbestos plates. The plates represent small, discrete, isolated parts of habitat. According with expectations, a trend of increasing space dominancy by colonial forms was detected as succession progressed. High within-habitat diversity but global persistency was confirmed f or this tropical system. Several mechanisms of succession were found to operate simultaneously. In this Caribbean fouling system the strong self-replacement tendencies of solitary forms and the low recruitment and growth rates of the potential space dominants (colonial forms) were mostly responsible for the successional patterns observed.
Tipo: Journal Contribution
Palavras-chave: Ecology; Ecological succession; Species diversity; Recruitment; Growth; Dominant species; Growth; Dominant species; Ecology; Ecological succession; Species diversity; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_2362; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_2464; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 1995
URL: http://hdl.handle.net/1834/3812

A preliminary investigation of age and growth of Otolithes ruber from KwaZulu-Natal, South Africa
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Fennessy, S.T.; Brash, J.M.
This study investigated age and growth of Otolithes ruber, found in KwaZulu-Natal, South Africa. The specimens were collected from prawn trawlers that operate off the shallow water Tugela Bank and from a recreational boat fishery in Durban. Estimates of age and growth parameters were based on the examination of sectioned sagittal otoliths. There was difficulty in estimating growth parameters for separate sexes because the small fish were not sexed and the numbers of males was low. Periodicity of growth zone formation was assumed to be annual although periodicity of growth zone deposition could not be established by marginal zone analysis. The von Bertalanffy growth curve was used to describe the combined male and female growth of O. ruber: Lt = 419mm TL...
Tipo: Journal Contribution
Palavras-chave: SCIAENIDAE; Age; Growth; Type specimens; Growth; Age; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 2005
URL: http://hdl.handle.net/1834/1130

Amelioration des conditions de vie des crevettes penaeus monodon  en elevage  semi-intensif par l'application  du produit  epicin (cas de la société AQUAMEN EF Tsangajoly): Aquaculture et controle de qualite
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Valerie  Aristide, R.
Presque soixante quinze ans sont écoulés depuis le début de l’élevage moderne des crevettes Pénéides. Jusqu’à maintenant, l’homme ne maîtrise pas encore totalement la conduite de l’élevage. Ce dernier est dû au fait que, il est difficile de reproduire fidèlement le milieu naturel, car il existe des paramètres qu’on ne pourra pas créer ni maîtriser. Mais, pour faire face aux problèmes survenus durant l’élevage, les aquaculteurs tentent toujours de trouver une solution adéquate à chaque problème qu’il rencontre. Dernierèment, ils ont créé un produit issu du milieu naturel pour assurer le nettoyage et le traitement du bassin d’élevage. C’est le produit EPICIN. Ce dernier a été testé dans la ferme de l’AQUAMEN E.F Tsangajoly et les résultats obtenus sont...
Tipo: Theses and Dissertations
Palavras-chave: Growth; Survival; Conversion factors; Penaeus monodon.
Ano: 2007
URL: http://hdl.handle.net/1834/5018

Estimación de los parámetros de crecimiento y reproducción de la sardina (Sardinella aurita) del Sureste de la Isla de Margarita, Venezuela
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Tagliafico, A.; González, L.W.; Eslava, N.
En Venezuela, la sardina (Sardinella aurita) es considerada un recurso estratégico por representar una fuente protéica de bajo costo y sustentar la pesquería artesanal de mayor importancia socio-económica el país. Por tal razón, los objetivos del presente trabajo fueron estimar los parámetros de crecimiento y aspectos reproductivos para contribuir a la evaluación y manejo de la pesquería de la sardina. Se colectaron 3960 individuos mediante muestreos mensuales de las capturas realizadas con chinchorro sardinero en el sureste de la Isla de Margarita, entre enero y diciembre de 2003. La longitud asintótica (L∞=26 cm) y el coeficiente de crecimiento (K=1.1 año-1) fueron estimados usando la rutina ELEFAN I del paquete FiSAT, conduciendo a un valor de índice de...
Tipo: Journal Contribution
Palavras-chave: Growth; Reproduction; Growth; Reproduction; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 2008
URL: http://hdl.handle.net/1834/3483

Estudio de edad y crecimiento del besugo Pagrus pagrus del sector costero bonaerense
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Cotrina, C.P.; Raimondo, M.C.
The samples analyzed for growth parameters determination both in length and weight of the red porgy Pagrus pagrus corresponded to the years 1972 up to 1981 and to two areas of the Buenos Aires (Argentina)coastal shelf: a northern one (35°-36°S)and a southern one (39°-40°). Through age determination, based on the countdown of rings in scales, the parameters of the von Bertalanffy growth equation for the two mentioned areas were estimated as follows: 1)northern area:Lý=44.7;k=0.154;to=-2.96, and 2)southern area:Lý=49.9;k=0.153;to=-2.81. The results shown that the infinite length of the red porgy from the southern area was the greatest. The maximum likelihood method permitted to calculate, for each region,the three parameters and the respective confidence...
Tipo: Journal Contribution
Palavras-chave: Age determination; Growth; Length-weight relationships; Age determination; Growth; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 1997
URL: http://hdl.handle.net/1834/1937

Dinámica poblacional del coroncoro Micropogonias furnieri (Pisces: Sciaenidae) en la Ciénaga Grande de Santa Marta, Caribe colombiano
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Narváez-Barandinga, J.C.; Blanco Racedo, J.
The “Coroncoro” fish Micropogonias furnieri has been one of the most important traditional fish resources in CGSM and CP. In order to determine exploitation status of its stock, aspects related to its biology and population parameters have been assessed. Mean maturity size was estimated in 20.7 cm at total length; whereas sex ratio was 2.39 females per male. Ripe individuals occurred throughout the whole year, with a maturation and spawning peak in the rainy season (november). Length-weight relationship showed no difference between sexes and a common equation with allometric growth W = 0.0064LT3.2 was estimated. The estimated parameters of von Bertalanffy growth function were L∞ = 34.0 cm, K = 0.44 yr-1, t0 = 0.301 yr and C = 0.5; with a growth index...
Tipo: Journal Contribution
Palavras-chave: Population dynamics; Fishery management; Artisanal fishing; Growth; Fishery management; Growth; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2006
URL: http://hdl.handle.net/1834/1980

Muestreo de desembarque de caballa (Scomber japonicus) en el puerto de Mar del Plata (38° S) y determinación de niveles de captura en el área El Rincón; período 1989-2003
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Perrotta, R.G.; Garciarena, A.D.; Hernandez, D.R.
Chub mackerel caught by the commercial fleet in El Rincón (39°-41° 30’ S) and Mar del Plata (38° S) areas was analyzed. In 2001 and 2002 samples from El Rincón were obtained from landings or collected by scientific observers on board the commercial ships. Samples from Mar del Plata were acquired during the 2001-2002 and 2002-2003 fishing seasons, on board two vessels of the small purse-seine fleet. Landings were mostly adults and only a small fraction of juveniles was observed (&lt; 5%). Length growth parameters from El Rincón samples were estimated, and length-weight and length-age relationships were fitted by Least Squares. The results were as follows: L(mm) = 538.4; k (years-1) = 0.122; t0 (years) = -4.92; Pt = 4*10-7 * Lt 3.536. Natural mortality was...
Tipo: Journal Contribution
Palavras-chave: Landing statistics; Catch/effort; Growth; Commercial fishing; Length-weight relationships; Growth; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 2007
URL: http://hdl.handle.net/1834/2516

Occurrence and Distribution of Stony Corals (Anthozoa and Hydrozoa) in the vicinity of Santa Marta, Colombia
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Antonius, A.
Un reconocimiento en los alrededores de Santa Marta, Colombia, realizado en Enero y Febrero de 1971, resultó con 33 especies de corales Scleractinias. Se determinaron distribución y abundancia relativa de las especies a lo largo de transectos. En estos se recolectaron también los especímenes, en cada caso desde el límite inferior de la presencia de corales (Existencia más profunda en 30 ms) hasta el eulitoral. La ausencia de verdaderos arrecifes puede ser la consecuencia de afloramiento de aguas frías.
Tipo: Journal Contribution
Palavras-chave: Aquatic reptiles; Growth; Coral; Growth; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 1972
URL: http://hdl.handle.net/1834/3317

Crecimiento y mortalidad de la castañeta Cheilodactylus bergien la zona común de pesca Argentino-Uruguaya
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Wöhler, O.C.
Growth parameters based on age assignation, length-weight relationship and mortality rates of castañeta Cheilodactylus bergi were studied. Samples came from landings at Mar del Plata Port(Buenos Aires province, Argentina) during 1989, and from a research cruise carried out in the Argentine-Uruguayan Common Fishing Zone(CFZ) during 1991. Castañeta is a longeval demersal species. The growth parameters of von Bertalanffy special model were: 1) Lý 31.95,34.69, 32,30; 2) K 040, 033, 039; and 3) t0 0.00, -0.16, 0.03 corresponding to males, females and all fish respectively. The rates of total mortality (Z) were 0.18, 0.16 and 0.17 for males, females and all fish, respectively. Because of the low rate of exploitation during the study, this values can be used as...
Tipo: Journal Contribution
Palavras-chave: Growth; Mortality; Length-weight relationships.
Ano: 1997
URL: http://hdl.handle.net/1834/5792

Effets de l’incorporation de la farine de tomate dans l’alimentation du Tilapia du nil (oreochromis niloticus, l., 1758) en élevage  dans les eaux géothermales du sud Tunisien
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Azaza, M.S.; Mensi, F.; Imouri Toko, I.; Dhraief, M.N.; Abdelmouleh, A.; Brini, B.; Kraiem, M.M.
Afin de réduire le coût des aliments aquacoles, nous avons procédé à la substitution d’une matière première végétale importée: le tourteau de soja (TS) par un sous produit local : la farine de tomate (FT). L’expérience est menée sur des juvéniles de Tilapia (Oreochromis niloticus) monosexe mâle ayant un poids moyen initial de 20,54 ± 0,08 g. (poids moyen ± ES), et elle consiste à tester 4 régimes alimentaires isoprotéiques (27 % de protéines) et isoénergétiques (17 KJ/g) contenant différents taux de farine de tomate: 0 % (aliment témoin), 10 %, 20 % et 30 % noté respectivement A0, A10, A20 et A30. Ces aliments sont testés, durant 75 jours.  A la fin de l’expérience les poids moyens finaux ont atteint des valeurs comprises entre 98,62 g et 129,77 g selon...
Tipo: Journal Contribution
Palavras-chave: Diets; Digestibility; Feed efficiency; Feeding experiments; Fish culture; Growth; Marine aquaculture; Nutrition; Oreochromis niloticus; Http://aims.fao.org/aos/agrovoc/c_34687.
Ano: 2006
URL: http://hdl.handle.net/1834/4238

Essai d’acclimatation du tilapia du nil "Oreochromis niloticus"  dans la retenue du barrage Lebna (Cap bon, Tunisie)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Derouiche, E.; Azaza, M.S.; Kraiem, M.M.
Ce travail consiste à tester l’acclimatation d’une espèce thermophile, le tilapia du Nil Oreochromis niloticus dans la retenue du barrage Lebna (Cap Bon), moyennant un système extensif de grossissement. Les résultats montrent que le tilapia introduit directement en pleine retenue a pu se maintenir et supporter les mauvaises conditions hivernales en adoptant une stratégie d’hibernation. Par ailleurs, avec le retour des conditions favorables (T&gt;20°C), ce Cichlidé a montré une bonne condition, une meilleure croissance qu’en élevage dans les bassins et cette fraction de population a pu proliférer.
Tipo: Journal Contribution
Palavras-chave: Acclimatization; Brackishwater fish; Environmental conditions; Fish culture; Growth; Hibernation; Population dynamics; Rearing; Water reservoirs; Testing; Tilapia.
Ano: 2009
URL: http://hdl.handle.net/1834/4494

Edad, crecimiento y mortalidad de Lutjanus purpureus Poey, 1867 (Pisces: Lutjanidae) de la region de Guyanas
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: González, L.W.; Eslava, N.; Silva, C,.
Se determinó la edad y se estimaron los parámetros de crecimiento y mortalidad del pargo colorado, Lutjanus purpureus Poey, 1867 con base en la lectura de 152 urohiales de 1561 individuos capturados durante 1988 de la región de Guayanas, comprendida entre los 06º - 10º LN y 54º - 61º LW, mediante la pesca exploratoria del B/I "Dr. Fridtjof Nansen". El recuento de zonas anuales en urohiales permitió establecer siete grupos de edad. La curva teórica de crecimiento en longitud se ajustó de acuerdo con los valores de los parámetros de crecimiento de von Bertalanffy : L∞ = 91.99 cm; K = 0.245 por año; to = -0.499 año. La mortalidad natural obtenida a través de la ecuación de Taylor fue igual a 0.255 por año y la mortalidad total calculada mediante el método de...
Tipo: Journal Contribution
Palavras-chave: Age; Growth; Mortality; Fish; Growth; Fish; Age; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1998
URL: http://hdl.handle.net/1834/3269

Características ecológicas del pulpito Octopus Tehuelchus en tres ambientes del golfo San Matías
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Storero, L.P.
Coastal marine ecosystems are highly variable and the inherent biotic and abiotic factors of these environments can influence the bio-ecological characteristics of the living cephalopods. The presence of the small octopus “pulpito” Octopus tehuelchus in the coastal environments of San Matías Gulf has been exploited by artisanal fishermen for more than 60 years. The aim of this study is to evaluate the variations in the life cycle of the pulpito, and the factors that could account for these variations in three different coastal environments of San Matías Gulf, with differences in the physical, ecological and fisheries characteristics. This study was developed in San Antonio bay, El Fuerte and Islote Lobos. Monthly samplings (October 2005-2007) in the...
Tipo: Theses and Dissertations
Palavras-chave: Fishery biology; Cephalopod fisheries; Artisanal fishing; Coastal zone management; Coastal environment; Environmental conditions; Population dynamics; Sex composition; Spatial distribution; Morphology (animal); Life cycle; Feeding; Size-at-first-maturity; Age determination; Growth; Reproduction; Reproductive behaviour.
Ano: 2010
URL: http://hdl.handle.net/1834/5023

Efecto de la densidad de siembra sobre el crecimiento y supervivencia de Nodipecten nodosus (Bivalvia: Pectinidae) en un nuevo arte de cultivo
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: López-Navarro, Johann; Gómez-León, Javier; Castellanos-Romero, Claudia; Acosta-Ortíz, Ernesto.
Como un aporte para determinar la factibilidad biológica y tecnológica del cultivo de Nodipecten nodosus en el Caribe colombiano, entre abril y noviembre de 2007 se evaluó el efecto de dos densidades de cobertura (30 y 50 %) sobre su crecimiento y supervivencia. En jaulas suspendidas en el mar a 5 m de profundidad se colocaron juveniles entre 60 y 65 mm de longitud. Se realizaron mediciones quincenales de la longitud de la concha y de la supervivencia. De igual manera se registró la temperatura, salinidad, seston total y materia orgánica particulada para determinar la relación presentada con estos factores; N. nodosus alcanzó una longitud de 84.7 y 87.9 mm a 30 y 50 % de densidad, espectivamente. Los tratamientos (30 y 50 %) no difirieron en la...
Tipo: Journal Contribution
Palavras-chave: Growth; Survival; Density; Mollusc culture; Mollusc culture; Growth; Survival; Density; Http://aims.fao.org/aos/agrovoc/c_4896; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7538; Http://aims.fao.org/aos/agrovoc/c_2186.
Ano: 2010
URL: http://hdl.handle.net/1834/3775

¿Existen variaciones interanuales en el crecimiento larval de anchoíta bonaerense (Engraulis anchoita)?
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Barretto, A.C.; Chandler, D.E.; Gómez, M.I.
Se determinaron las tasas de crecimiento de larvas de la anchoíta argentina (Engraulis anchoíta) provenientes de la plataforma bonaerense, contando y midiendo incrementos diarios en sus otolitos sagitta. Las larvas se capturaron en diferentes años y durante diferentes épocas (otoño de 1999; invierno de 2000 y primavera de 2002, 2003 y 2004)a los fines de analizar diferencias interanuales en el crecimiento. Se observó que tanto el crecimiento de las larvas como el del otolito estaban acoplados. Las tasas de crecimiento se calcularon en forma individual (para cada larva) o a partir de modelos largo-edad. Dichos valores no resultaron significativamente distintos entre las primaveras y promediaron 0.44 mm/día. Tampoco hubo diferencias entre las temperaturas...
Tipo: Theses and Dissertations
Palavras-chave: Age; Growth; Hydrography; Annual variations; Fish larvae; Growth; Age; Hydrography; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2005
URL: http://hdl.handle.net/1834/2605

Growth of Argentine silverside (Odontesthes bonariensis) stocked at low densities in two oligohaline shallow lakes (Buenos Aires province, Argentina)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Espinach Ros, A.; Dománico, A.
Argentine silversides (Odontesthes bonariensis) stocked as fry (45 days old) at low densities in two oligohaline Pampasic shallow lakes (Buenos Aires province, Argentina) grew to legal harvest size (250 mm, total length) in one year, and averaged 403 mm in length and 500 g in weight after 25 months.
Tipo: Journal Contribution
Palavras-chave: Fish culture; Growth; Growth; Shallow water; Oligotrophic lakes; Fish culture; Growth; Growth; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 2006
URL: http://hdl.handle.net/1834/2513

Algunos resultados de las campañas primaverales de evaluación anual de anchoíta bonaerense efectuadas entre 1993 y 1996.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Hansen, J.E.; Madirolas, A.
Information resulting from four spring acoustic surveys carried out between 1993 - 1996 to assess bonaerensis anchovy (Engraulis anchoita) biomass (34°- 41°30´S) is presented. Annual estimates, successively higher, went from 1.5 to 5.3 millon tons and the respective coefficient of  variability that followed the same trend ranged between 7.4.  and 28.0. . In general terms, the largest abundances were those recorded within the coastal strata off the Río de la Plata followed by those of the most southern stratum. Nevertheless, during the 1996 survey, the latter showed very high biomass values and, consequently, the largest mean. The region corresponding to the main commercial anchovy fishing ground during the season  represented, in any case, relatively low...
Tipo: Journal Contribution
Palavras-chave: Echo surveys; Biomass; Sexual maturity; Growth; Mortality; Biomass; Growth; Sexual maturity; Mortality; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999
URL: http://hdl.handle.net/1834/2531

Características estructurales y funcionales del Manglar de Avicennia germinans en la Bahía de Chengue (Caribe colombiano)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Rodríguez-Ramírez, A.; Nivia-Ruíz, J.; Garzón-Ferreira, J.
Within the framework of the CARICOMP(Caribbean Coastal Marine Productivity) monitoring program, a study of the Avicennia germinans mangrove formation of Chengue bay (Tayrona Natural Park, Colombia) was performed between June 1995 and July 1996, based on the evaluation of structural and functional characteristics at three monitoring plots (10 x 10 m). The structure of the studied formation is coincident with that of fringing forests of the Caribbean region in having small trees (dbh=11.3 cm, total height=6.3 m) and high densities (16.3 trunks/0.01 ha). During the monitored period there was a low mortality rate (0.7 trees/year) and there were significant increases of the circumferences at breast height (as well as of the variables derived from this measure)....
Tipo: Journal Contribution
Palavras-chave: Population structure; Growth; Mangroves; Population structure; Growth; Mangroves; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_16190.
Ano: 2004
URL: http://hdl.handle.net/1834/3081

Le Rouget de roche (Mullus surmuletus l. 1758) des côtes nord tunisiennes : reproduction, sexualité et croissance
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: M’rabet, R; Gharbi, H; Missaoui, H; Cherif, M.; Jarboui, O.
L’objectif principal de ce travail, est la réactualisation des paramètres biologiques du rouget de roches des côtes Nord tunisiennes qui sont indispensables pour toute étude ultérieure d’évaluation de stock. Le suivi mensuel du rapport gonado-somatique a montré que la période de ponte de rouget de roche s’étale sur 3 mois d’avril à juillet. La taille pour laquelle 50% des individus sont matures a été estimée à une longueur totale de 16,43cm pour les femelles et de 16,02cm pour les mâles. L’étude de la sex-ratio en fonction des mois a montré que les femelles sont toujours plus nombreuses que les mâles. La répartition des sexes en fonction de la longueur totale montre que les femelles dominent dans la plupart des classes de taille. Les équations...
Tipo: Journal Contribution
Palavras-chave: Mullus surmuletus; Biological surveys; Growth; Length-weight relationships; Sex ratio; Sexual maturity; Size distribution; Spawning; Growth; Spawning; Sexual maturity; Sex ratio; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_7014.
Ano: 2007
URL: http://hdl.handle.net/1834/4151

Efectos de temperatura y salinidad sobre el crecimiento de juveniles de besugo Pagrus pagrus (Linné,1758)(Actinopterygii; Perciformes) en sistemas de recirculación cerrada
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Suárez, J.
The growth and survival of juvenile red porgy, Pagrus pagrus, reared in captivity (mean body weigth 81.0 not equal to 37.24g), exposed to two different temperatures (18 degree and 22 degree C)and three salinities (21, 27 and 33 psu)during a 30 day period, were studied. Final survival rate was 100. in all treatments. The highest growth rate was reached at 18 degree C/33 psu with a value of 1.07 /day. There was an inverse trend in the growth rate between the two temperatures. Food consumption increased with the increase of salinity and temperature. The highest food consumption rate was 1.17. (18 degree C/33 psu). The relationships between protein efficiency ration (PER)and salinity were positive at 18 degree C and negative at 22 degree C. The highest values...
Tipo: Theses and Dissertations
Palavras-chave: Environmental effects; Fish culture; Food consumption; Growth; Juveniles; Recirculating systems; Survival; Marine aquaculture; Fish culture; Food consumption; Growth; Juveniles; Survival; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_3016; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 2004
URL: http://hdl.handle.net/1834/2601

Aspectos biológicos del calamar Illex argentinus
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Leta, H.R.
La creciente importancia que los recursos de calamar han adquirido en 105 últimos 30 años, los sitúa actualmente entre los más importantes recursos pesqueros del mundo. En consecuencia, paises tradicionalmente no explotadores o consumidores de productos de calamar, han orientado sus esfuerzos hacia el logro de un mejor conocimiento de las especies de cefalópodos que habitan su ambiente marino. En este sentido el aporte de disciplinas tales como la biología ha sido decisivo para desarrollar en forma exitosa pesquerías de calamar, entre otras.El programa de investigaciones del Instituto Nacional de Pesca para 1980 incluyó el estudio integral de la explotación de los calamares como un primer paso hacia el desarrollo de una pesquería del recurso.  Este trabajo...
Tipo: Report
Palavras-chave: Biology; Environmental conditions; Population structure; Spawning; Spawning grounds; Sex ratio; Sexual maturity; Reproduction; Length; Behaviour; Migrations; Growth; Population structure; Spawning; Length; Growth; Biology; Environmental conditions; Spawning grounds; Sex ratio; Sexual maturity; Reproduction; Behaviour; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_4260; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_925; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_7277; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_868.
Ano: 1981
URL: http://hdl.handle.net/1834/2563

Etude préliminaire de l’age et de la croissance de l’espadon (&lt;Xiphias gladius&gt;) des eaux Tunisiennes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Hattour, A.; Gaamour, A.; Ben Smida, M.A.
Une clé préliminaire âge taille et âge poids est présentée à partir d’un échantillonnage mené sur 212 espadon (Xiphias gladius L.) pêchés le long des côtes tunisiennes entre mars et septembre 2004. les tailles des poissons sont rangées de 60 cm à 173 cm, correspondant à des poids variant de 1,5 kg à 55 kg. L’analyse des coupes de la 2ème épine de la nageoire anale des espadons échantillonnés ont révélé que les âges sont rangés entre 0 et 5 années.
Tipo: Journal Contribution
Palavras-chave: Age composition; Cosmopolite species; Growth; Length; Size distribution; Tuna fisheries; Weight; Population structure; Age composition; Growth; Length; Population structure; Weight; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4260; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_8349.
Ano: 2005
URL: http://hdl.handle.net/1834/3737

Contribution à l'étude de la croissance de la fougère aquatique Salvinia molesta (Mitchell), Salviniaceae
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Etien, N.; Sankaré, Y.; Kaba, N.
La croissance des formes primaire (forme colonisatrice) et tertiaire (forme en "tapis dense") de la fougère d'eau Salvinia molesta (Salviniaceae) a été suivie pendant 60 jours dans des récipients de surface de 0.06m2 et contenant de l'eau douce. La croissance en fonction du temps de cette espèce est exponentielle. Les deux formes d'expansion présentent des taux de croissance statistiquement identiques. L'accroissement journalier moyen, exprimé en nombre de feuilles, est égal à 6,40% par jour pour la forme colonisatrice et à 5,90% par jour pour la forme en "tapis dense" avec des temps de doublement moyens équivalents à 10,78+_ 1.08 jours et à 11.64+_ 0,15 jours.
Tipo: Journal Contribution
Palavras-chave: Aquatic plants; Growth.
Ano: 1991
URL: http://hdl.handle.net/1834/5162

Avances en métodos y tecnología aplicados a la investigación pesquera. Seminario final del Proyecto INIDEP-JICA sobre evaluación y monitoreo de recursos pesqueros 1994-1999
Provedor de dados: Ocean Docs: e-repository of  publications
The Seminar organized by the Japan International Cooperation Agency (JICA) and the National Institute for Fisheries Research and Development (INIDEP) of Argentina, was held at INIDEP, Mar del Plata from September 6-9, 1999. The publication comprises expanded abstracts of each presentation, in four Theme Sessions: Reproduction and Survival, Age and Growth, Stock Identifcation and Resource Management Techniques and Relation between Oceanographic and Fishing Conditions. Presentations focused mainly on the following marine resources: squids Illex argentinus and Loligo sanpaulensis; and fish species southern blue whiting Micromesistius australis, patagonian hoki Macruronus magellanicus, kingklip Genypterus blacodes,  patagonian toothfish Dissostichus...
Tipo: Book
Palavras-chave: International cooperation; Research programmes; Fishery resources; Reproduction; Survival; Growth; Age determination; Fishery management; Population structure; Stock identification; Mesh selectivity; Satellite sensing.
Ano: 1999
URL: http://hdl.handle.net/1834/5510

Biología, ecología y explotación de la raya platana Atlantoraja platana (Günther, 1880), (Chondrichthyes, Rajidae), del golfo San Matías
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Coller, N.M.
La “raya platana” (Atlantoraja platana), es una especie endémica del Atlántico Sudoccidental, habita desde los 22º S (Uruguay y sur de Brasil) hasta los 42º S, región del Golfo San Matías (Argentina). El área de estudio del presente trabajo fue el Golfo San Matías (41º- 42º S y 64º- 65º O). El material analizado (778 hembras y 709 machos) fue colectado durante muestreos mensuales de las capturas desembarcadas por los barcos pesqueros de la flota local (muestreos de desembarque); muestras extraídas a bordo de las embarcaciones pesqueras por el programa de observadores a bordo, durante los años 2004 y 2005 y los meses de marzo, abril y mayo de 2006; y durante la realización de campañas de investigación pesquera (primavera de 2004, 2005 y 2006). Se describió...
Tipo: Theses and Dissertations
Palavras-chave: Fishery biology; Ecology; Feeding behaviour; Age (biological); Growth; Coastal environment; Morphology (animal); Reproduction (biology); Spatial distribution; Population dynamics; Abundance.
Ano: 2012
URL: http://hdl.handle.net/1834/5235

Impact de l'érosion côtière et éléments d'étude de vulnérabilité : example du Togo (Golfe de Guinée)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Blivi, A.B.
La morphodynamique côtière permet d'analyser les séquences de plages réflexives et dissipatrices des côtes sablonneuses. Les ouvrages maritimes perturbent le mécanisme hydro-sédimentaire et déclenchent l'érosion côtière dont les impacts de recul sont généralement assez forts, notamment de 12 m/an sur le segment de 5 km de côte, à l'est du système d'infrastructures portuaires de Cotonou, au Bénin, et de 5 à 10 m/an sur environ 30 km de côte, au Togo. Cette caractérisation morphodynamique de plage, aussi bien à court qu'à long terme, est en réponse aux variations significatives du bilan sédimentaire dont les conséquences ' sont très importantes du fait de l'utilisation de l'espace pour des activités industrielles et urbaines très variées et de la forte...
Tipo: Journal Contribution
Palavras-chave: COASTAL EROSION; Coastal zone; Growth; Population dynamics; Population number; Growth; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2001
URL: http://hdl.handle.net/1834/1236

Aspectos de la biología de Portunus spinicarpus Stimpson 1871 (Decapoda: Portunidae) en el Golfo de Salamanca, Caribe colombiano
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: García, C.B.; Mendoza, N.
Some vital statistics of the population of Portunus spinicarpus inhabiting the Golfo de Salamanca, Colombian Caribbean, are presented for the first time. Condition factor was found stable the year round, Von Bertalanffy growth parameters were estimated as L∞=38.6 mm, K= 2.5 year-1, to= -0.0573 year. Natural mortality was estimated as 4.62 year-1. P. spinicarpus seem to prefer deep waters and sand-muddy bottoms.
Tipo: Journal Contribution
Palavras-chave: Marine crustaceans; Population number; Mortality; Growth; Growth; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 2006
URL: http://hdl.handle.net/1834/1984

Détermination de l'âge des chinchards (Trachurus trachurus et Trachurus trecae) de la ZEE mauritanienne par otolithométrie.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mylnikov, N.; Ba, I.S.
Résumé : Cette étude traite de la détermination de l’âge des chinchards Trachurus trachurus et Trachurus trecae pêchés dans la ZEE mauritanienne de juin 1987 à décembre 1988. La méthode utilisée est celle dite de lecture directe des otolithes selon l’hypothèse : « une marque = une année ». Les paramètres de croissance estimés sont dans la plupart des cas voisins de ceux déjà obtenus sur ces deux espèces dans la région, mais restent cependant tributaires de la période et de la périodicité de formation des marques. Abstract : This work studies the age determination of horse-mackerels Trachurus trachurus and Trachurus trecae fished in Mauritanian waters from June 1987 to December 1988, using the direct reading of otoliths with the hypothesis: « One mark = one...
Tipo: Journal Contribution
Palavras-chave: Otoliths; Mauritania; Trachurus trecae; Growth; Mauritanie; Horse-mackerels; Otolithes; Chinchards; Trachurus trachurus; Croissance; Horse mackerel fisheries.
Ano: 1990
URL: http://hdl.handle.net/1834/784

Relation entre la densite des microstries et le rayon de l'otolithe compatible avec le modele de von Bertanlanffy: application a Lutjanus sebae (Cuvier, 1828) aux Seychelles
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Bach, P.; Chauvelon, P.
The age study of fishes using daily growth increments DGI observations is made from: 1- either the exhaustive determination of increments, 2- or the calculation of daily growth increments density for different otolith zones between the nucleus and the margin edge of otolith, the width of increments being presumed constant for each zone. To apply the first method, increments may be readable individually from the nucleus to the margin edge of otolith. This is a very time consuming operation. It can cause miscalculation of increments and errors of the age estimation. The second method, called "DGI density method" is based on the decrease of the increment width in relation to the slowing down of the growth phenomena. The more used approach according to this...
Tipo: Report
Palavras-chave: LUTJANUS SEBAE; Age determination; Growth; Methodology; Otolith reading; Age determination; Growth; Methodology.
Ano: 1994
URL: http://hdl.handle.net/1834/1315

Efectos del desdoble sobre la biomasa cosechable de Mytilus platensis D'Orb en cultivo.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Zaixso, H.E.; Lizarralde, Z.I.
The effect of thinning on the harvestable biomass of mussel Mytilus platensis (d'Orb.) cultures was analyzed. Mussels were grown on ropes in sub-surface long-lines in Golfo Nuevo (Chubut, Argentina, 64° 59' W; 42°46' S) during a 15 month period (January 1987-April 1988). Ropes were seeded using the Spanish method with 2,000 individuals per rope meter. The thinning-out was performed three months later using the following thinning ratios (TR: number of half-grown ropes obtained from one seed rope):1,6 (900 individuals m super(-1)), 2,4 (600 individuals m super(-1)) and 3,2 (450 individuals m super(-1)). Growth rate (shell length and meat weight), survival and number of harvestable ropes increase with the thinning rate; the harvestable biomass being larger at...
Tipo: Journal Contribution
Palavras-chave: Mussel culture; Growth; Survival; Growth; Survival; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 2001
URL: http://hdl.handle.net/1834/1865

Variaciones estacionales en el crecimiento de larvas de anchoita (Engraulis anchoita).
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Leonarduzzi, E.
Age and growth rates of southern anchovy larvae (Engraulis anchoita)were estimated by analysis of daily increments in sagittal otoliths under light microscopy. Samples were collected during 2002 with a bongo net, in the Buenos Aires province, Argentine Sea (SW Atlantic). Otoliths corresponding to 251 larvae (size range 3.5 u 12.2 mm SL)were analyzed. Growth rate estimated as slopes by linear regression of length-age data were 0.50, 0.40, and 0.42 mm/day, and these values corresponded to larvae collected in spring, summer and autumn. Larval growth were significantly distinct between the year seasons (ANCOVA, p&lt;0.01). Recent larval growth expressed as mean growth rates during the last 4 days of the larvae was not correlated with surface temperature. The...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Growth; Otoliths; Seasonal variations; Daily variation; Growth; Otoliths; Fish larvae.
Ano: 2002
URL: http://hdl.handle.net/1834/1484

Edad, crecimiento e influencia del ambiente en la distribución de Paralichthys patagonicus en el Sistema Costero del Atlántico Sudoccidental ( 34º-41ºS)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Riestra, C.M.
La edad, el crecimiento y la influencia del ambiente en la distribución estacional (invierno y primavera) de las clases de edad de Paralichthys patagonicus  fueron estudiadas en el Sistema Costero del Atlántico Sudoccidental (SCAS) (34º-41ºS). Para determinar la edad se analizaron los otolitos sagittae provenientes de 1402 ejemplares colectados en otoño-invierno (n = 695) y en primavera-verano (n = 707) en campañas de investigación y desembarque comercial realizados entre el 2005 y 2009. En cada ejemplar se determinó largo total, peso, sexo. La validación de la formación de los anillos de crecimiento se realizó mediante el análisis mensual del borde del otolito. La precisión de las lecturas se evaluó a través del índice de precisión, coeficiente de...
Tipo: Theses and Dissertations
Palavras-chave: Age determination; Growth; Environmental conditions; Geographical distribution; Coastal waters; Geographical distribution; Age determination; Growth; Coastal waters; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_25205; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2010
URL: http://hdl.handle.net/1834/4065

International study on &lt;i&gt;Artemia&lt;/i&gt; : 48. The effect of temperature on cyst hatching larval survival and biomass production for different geographical strains of brine shrimp &lt;i&gt;Artemia&lt;/i&gt; spp.
Provedor de dados: Open Marine Archive
Autores: Vanhaecke, P.; Sorgeloos, P.
The effect of temperature on different geographical strains of &lt;i&gt;Artemia&lt;/i&gt; has been studied for the following criteria: the hatchability of the cysts, the resistance of the larvae to high temperature (34°C) and the biomass production of larvae cultured under standard conditions. Experimental temperatures ranged from 25° to 37°C for the hatching criteria and from 20° to 32.5°C for the biomass production.Both the hatching percentage and growth performance are affected by temperature. However, the relative and quantitative impact of temperature varies widely among &lt;i&gt;Artemia&lt;/i&gt; strains. This is also the case for the temperature resistance of the larvae. The impact of increasing temperatures on cyst hatching as well as the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture techniques; Biomass; Brine shrimp culture; Growth; Larvae; Survival; Temperature effects; Artemia.
Ano: 1989
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3194

Competition between the sibling species &lt;i&gt;Tisbe holothuriae&lt;/i&gt; and &lt;i&gt;T. battagliai&lt;/i&gt; (Harpacticoida)
Provedor de dados: Open Marine Archive
Autores: Bergmans, M.; Janssens, P.P.M.
The influence of the salinity on the performance of the sibling species &lt;i&gt;Tisbe holothuriae&lt;/i&gt; and &lt;i&gt;T. battagliai&lt;/i&gt; in pure and mixed cultures was studied, using laboratory stocks adapted to 32 pro mille for over 175 generations. Cohort studies show that &lt;i&gt;T. holothuriae&lt;/i&gt; has higher growth rates (R&lt;sub&gt;0&lt;/sub&gt; and r) at 32 pro mille, &lt;i&gt;T. battagliai&lt;/i&gt; at 20 pro mille. The latter's life cycle is much less affected by the difference in salinity. 'De Wit' replacement series were used to study competitive interactions. Without water renewal, &lt;i&gt;T. holothuriae&lt;/i&gt; eliminates its sibling species in less than 2 generations, apparently through chemical interference. With water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Competition; Growth; Marine crustaceans; Phenology; Salinity; Sexual reproduction; Sibling species; Harpacticoida; Tisbe battagliai; Tisbe holothuriae.
Ano: 1988
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3121

International study on &lt;i&gt;Artemia&lt;/i&gt;: 14. Growth and survival of &lt;i&gt;Artemia&lt;/i&gt; larvae of different geographical origin in a standard culture test
Provedor de dados: Open Marine Archive
Autores: Vanhaecke, P.; Sorgeloos, P.
For characterization of strains of the brine shrimp &lt;i&gt;Artemia&lt;/i&gt; of different geographical origin, a standard culture test has been developed in order to compare statistically growth and survival of larvae of different strains. 25 geographical strains have been studied so far -including, for 3 strains, analyses of cysts harvested at different times. Important differences in rates of growth and survival were observed between strains but not among batches of the same strain. Best performances were noted for strains from Bahia Salinas (Puerto Rico), Buenos Aires (Argentina), Chaplin Lake (Canada), Great Salt Lake (Utah, USA), Galera Zamba and Manaure (Colombia).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Growth; Larvae; Survival; Artemia.
Ano: 1980
URL: http://www.vliz.be/imisdocs/publications/261892.pdf

Growth and toxicity tests on the marine nanoplanktonic alga &lt;i&gt;Platymonas tetrathele&lt;/i&gt; G.S. West in the presence of crude oil and emulsifiers
Provedor de dados: Open Marine Archive
Autores: Mommaerts-Billiet, F.
Phytoplankton response to environmental pollution by oil and emulsifiers has been studied. The nanoplanktonic flagellate &lt;i&gt;Platymonas tetrathele&lt;/i&gt; has been assayed with increasing concentrations of crude oil, industrial non-ionic emulsifiers and mixtures of these products. Cultures poisoned with an emulsifier with an aromatic solvent exhibited a very long lag phase. Diminished growth rates were observed for all the products tested most of the time at concentrations above 50 ppm. The mixtures showed a toxicity close to that of the emulsifier component at its concentration in the mixture and lower than that of the crude oil alone. Fine structure modifications have been investigated and the possible ecological effects of such pollution have...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Marine pollution; Nannoplankton; Toxicity tests.
Ano: 1973
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3478

The effect of HUFA and vitamin C-enriched rotifers on larval growth and survival of grouper (&lt;i&gt;Epinephelus suillus&lt;/i&gt;)
Provedor de dados: Open Marine Archive
Autores: Chavez, D.R.; Estenor, D.G.; Merchie, G.; Lavens, P.
Newly-hatched grouper larvae were reared for 24 days at a density of 15 larvae.l&lt;sup&gt;-1&lt;/sup&gt; in 250-l capacity cylindro-conical tanks filled with 200l seawater. Starting day 2, the larvae were given: &lt;i&gt;Chlorella&lt;/i&gt;-fed rotifers (Chl-R) rotifers fed Culture Selco (INVE Aquaculture NV, Belgium) (CS-R), and rotifers fed Culture Selco and consequently enriched for 24h with 20% vitamin C (CSC-R). The rotifer density in the larval tanks was maintained at 15 rotifers.ml&lt;sup&gt;-1&lt;/sup&gt;. The rotifer diet was supplemented with egg yolk until day 5. Each treatment had five replicates. Preliminary results show no significant difference in the survival rate of grouper larvae given Chl-R (4.21±2.8%), CS-R (2.56±0.9%) and CSC-R...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fatty acids; Feeding experiments; Growth; Larvae; Survival; Vitamin C; Chlorella; Epinephelus suillus; Rotifera.
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2537

Growth and respiration of &lt;i&gt;Cyprideis torosa&lt;/i&gt; Jones 1850 (Crustacea Ostracoda)
Provedor de dados: Open Marine Archive
Autores: Herman, P.M.J.; Heip, C.H.R.
The ostracod &lt;i&gt;Cyprideis torosa&lt;/i&gt; Jones 1850 is a dominant species in brackish water habitats. To assess its importance, growth and respiration were measured. The shells form an increasing part of total weight as the animals grow but there is no correlation between shell weight and soft parts weight in the adults, indicating that tissue growth is a continuous process in these ostracods. Respiration was measured at 20 °C. The slope of the log-log regression of respiration on dry weight was 0.746, showing that &lt;i&gt;Cyprideis torosa&lt;/i&gt; follows the general rule for this relationship. The respiration rate per unit biomass was 0.246 nl O&lt;sub&gt;2&lt;/sub&gt; µg&lt;sup&gt;-1&lt;/sup&gt; h&lt;sup&gt;-1&lt;/sup&gt;, which is low but...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Respiration; Cyprideis torosa.
Ano: 1982
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3382

Caracterização e dinâmica da vegetação de uma Savana Estépica Parque, Barra do Quaraí, RS, Brasil
Provedor de dados: PFB - Pesquisa Florestal Brasileira
Autores: Watzlawick, Luciano Farinha; Longhi, Solon Jonas; Schneider, Paulo Renato; Finger, César Augusto Guimarães; Longhi, Regis Villanova.
O objetivo foi caracterizar a florística, estrutura fitossociológica e dinâmica em Savana Estépica Parque no Parque Estadual do Espinilho, Barra do Quaraí, RS. Em unidade amostral permanente de 1 ha, foram identificados e medidos os indivíduos com diâmetro à altura do peito (DAP) ≥ 10 cm. A florística constitui-se de Prosopis affinis, Prosopis nigra, Acacia caven e Scutia buxiflora, possuindo densidade de 141 e 145 indivíduos por hectare nos anos de 2001 e 2009. O incremento médio anual foi de 0,027 cm ha-1 ano-1, com taxas de ingresso e mortalidade de 0,36% ao ano. Pode-se concluir que a vegetação encontra-se estagnada.doi: 10.4336/2010.pfb.30.64.363
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Parque do Espinilho; Prosopis; Growth; Phytosociology Parque do espinilho; Prosopis; Crescimento; Fitossociologia.
Ano: 2010
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/107

Influência de diferentes doses de fósforo no crescimento de plantas de Peltophorum dubium (Sprengel) Taubert
Provedor de dados: PFB - Pesquisa Florestal Brasileira
Autores: Schumacher, Mauro Valdir; Ceconi, Denise Ester; Santana, Cedinara Arruda.
Este experimento foi realizado com o objetivo de estudar os efeitos de diferentes doses de fósforo no crescimento de plantas de Canafístula (Peltophorum dubium). O substrato utilizado foi do tipo Argissolo Vermelho-Amarelo coletado na camada superficial (0-20 cm), o qual foi destorroado, homogeneizado, seco ao ar, passado em peneira de 2 mm e, posteriormente, analisado quimicamente. Como adubação complementar foram adicionados 10 mg kg-1 de N e 12,5 kg-1 de K, as fontes foram (NH4)2SO4 e KCl. O delineamento experimental utilizado foi o inteiramente casualizado com 8 tratamentos e 8 repetições, totalizando 64 parcelas. Os tratamentos foram constituídos por: testemunha (solo sem adição de fósforo), 90, 180, 270, 360, 450, 540, 630 mg kg-1, de P (utilizando...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fósforo; Peltophorum dubium; Crescimento; Nutrição Phosphorus; Peltophorum dubium; Growth; Nutrition.
Ano: 2003
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1611

Sweet orange trees grafted on selected rootstocks fertilized with nitrogen, phosphorus and potassium
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Quaggio,José Antônio; Mattos Junior,Dirceu; Cantarella,Heitor; Stuchi,Eduardo Sanches; Sempionato,Otávio Ricardo.
The majority of citrus trees in Brazil are grafted on 'Rangpur lime' (Citrus limonia Osb.) rootstock. Despite its good horticultural performance, search for disease tolerant rootstock varieties to improve yield and longevity of citrus groves has increased. The objective of this work was to evaluate yield efficiency of sweet oranges on different rootstocks fertilized with N, P, and potassium. Tree growth was affected by rootstock varieties; trees on 'Swingle' citrumelo [Poncirus trifoliata (L.) Raf. × C. paradisi Macf.] presented the smallest canopy (13.3 m³ in the fifth year after tree planting) compared to those on 'Rangpur lime' and 'Cleopatra' mandarin [C. reshni (Hayata) hort. ex Tanaka] grown on the same grove. Although it was observed an overall...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Citrus; Growth; Yields; Canopy.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000100008

Growth, yield, water and effluent quality in ponds with different management during tambaqui juvenile production
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Silva,Ana Maria Dias da; Gomes,Levy de Carvalho; Roubach,Rodrigo.
The objective of this work was to evaluate the effect of pond management on fish feed, growth, yield, survival, and water and effluent quality, during tambaqui (Colossoma macropomum) juvenile production. Fish were distributed in nine 600 m² earthen ponds, at a density of 8 fish per m²; the rearing period was 60 days. Three different pond management were applied: limed and fertilized (LimFer), limed (Lim), and natural (Nat). Fish were fed with a commercial ration containing 34% crude protein three times daily. There were no significant differences in fish growth or yield. Three main items found in tambaqui stomach were insect, zooplankton and ration, without a significant difference among treatments in proportion. Alkalinity, hardness, and CO2 were greater...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colossoma macropomum; Growth; Yield; Diet; Environmental impact.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000500017

Potassium supply to cotton roots as affected by potassium fertilization and liming
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Rosolem,Ciro Antonio; Silva,Rosemeire Helena da; Esteves,José Antonio de Fátima.
Cotton (Gossypium hirsutum) is known to have a high requirement for K and to be very sensitive to low soil pH. Most of K reaches plant roots by diffusion in the soil. As K interacts with Ca and Mg, liming can interfere in K movement in the soil, affecting eventually the plant nutrition. The objective of this work was to study the effect of dolomitic lime and 0, 15, 30, 45 and 60 g kg-1 of K on the supply of K to cotton roots. Cotton plants were grown up to 40 days in 5 L pots containing a Dark Red Latosol (Typic Haplusthox) with 68% and 16% of sand and clay, respectively. There was an increase in dry matter yields and in K accumulation due to K fertilization. Root interception of soil K was also increased by K application, but was not affected by lime....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gossypium hirsutum; Mass; Diffusion; Liming materials; Roots; Growth; Plant nutrition.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000500012

Sensitivity of yellow passion fruit to ultraviolet-B radiation
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Cechin,Inês; Rocha,Valéria de Jesus; Fumis,Terezinha de Fátima.
The objective of this work was to evaluate the effects of UV-B radiation on the vegetative growth and on the gas exchange characteristics of passion fruit plants (Passiflora edulis) grown in greenhouse. The average unweighted UV-B radiation near the apex of the plants was 8 W m-2 for the UV-B treatment (high UV-B), and 0.8 W m-2 for the control plants (low UV-B). Plants were irradiated with UV-B for 7 hours per day, centered on solar noon, during 16 days. High UV-B radiation resulted in lower shoot dry matter accumulation per plant. The content of UV-B absorbing compounds and anthocyanins was increased in the plants exposed to high UV-B radiation, when compared with the control. UV-B radiation did not affect stomatal conductance or transpiration rate, but...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passiflora edulis; Anthocyanins; Growth; Phenolic compounds; Photosynthesis.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001000002

Nitrogen fertilization in consecutive cycles and its impact on high-density peach crops
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Ferreira,Letícia Vanni; Picolotto,Luciano; Pereira,Ivan dos Santos; Schmitz,Juliano Dutra; Antunes,Luis Eduardo Corrêa.
Abstract: The objective of this work was to evaluate the effect of nitrogen fertilization on the mineral composition of leaves, initial growth, and yield of peach (Prunus persica) tree advanced selections grown at a high-planting density. The experiment was carried out between 2012 and 2015 in a randomized complete block design, with a combination of advanced selections of the 'Cascata 1513' and 'Cascata 1067' peach trees and of N fertilization doses (0, 30, 60, and 120 kg ha-1 N). Green weight after pruning, diameter, and increase of trunk diameter, canopy volume, plant height, branch length, number of buds per centimeter of shoot, chlorophyll index, leaf area, rust incidence, average production, number of fruit, and mass of fruit were evaluated. Genotype...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prunus persica; Growth; Nitrogen; Nutrition; Planting density.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000200172

Effect of vermicompost on the growth and health of Impatiens wallerana
Provedor de dados: Phyton: Revista Internacional de Botánica Experimental
Autores: Asciutto,K; Rivera,MC; Wright,ER; Morisigue,D; López,MV.
Rhizoctonia solani damping-off and root rot diseases are frequent in impatiens crops in Buenos Aires. Their control is based in fungicide use. In a sustainable nursery production, beneficial microorganisms that develop in organic amendments may suppress diseases and promote plant growth. The aim of this work was to evaluate the effect of different proportions of vermicompost on the growth and health of patience-plant (Impatiens wallerana). The experiment was carried out in a polyethylene greenhouse. Treatments were defined as follows: infested substrate, substrate, sterilized substrate, vermicompost, and vermicompost mixed with infested substrate at 75, 50 and 25% by volume. Seeds of I. wallerana were sown in plugs containing the different substrates....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vermicompost; Growth; Damping-off; Impatiens wallerana.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572006000100012

Application of Wireless Power Transmission Led Lighting System in Propagation of Chrysanthemum and Strawberry
Provedor de dados: Planta Daninha
Autores: NAM,N.B.; HUY,N.P.; LUAN,V.Q.; TUNG,H.T.; NHUT,D.T.
ABSTRACT Wireless power transmission has been recently used to charge batteries in portable devices. This is the first study to combine this technology with light-emitting diodes (WPT-LP) for plant tissue culture application. We also present the comparison of the in vitro growth of chrysanthemum and strawberry plantlets under the new LED lighting system; LED - Uni-Pack (LP) system; LED tube and fluorescent light (FL). The results showed that fresh weight (1.42 g), dry weight (118.67 mg), plant height (5.68 cm), leaf area (3.59 cm2) and chlorophyll content (47.9 μg g-1) of chrysanthemum plantlets under the WPT-LP system were higher than those under FL and LED tube. Similar results were also recorded on the strawberry plantlets. Our results suggested that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chrysanthemum; Development; Growth; LEDs; Photosynthetic photon flux density; Wireless power transfer.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400617

Allelopathic Influence of Sorghum Aqueous Extracts and Sorghum Powder on Germination Indices and Seedling Vigor of Hybrid Corn and Jungle Rice
Provedor de dados: Planta Daninha
Autores: YAR,S.; KHAN,E.A.; HUSSAIN,I.; RAZA,B.; ABBAS,M.S.; MUNAZZA,Z.
ABSTRACT: Allelopathy has become a paramount tool for controlling weeds in crop plants without deteriorating the environment. Allelopathic effects of sorghum aqueous extracts and sorghum powder on a single cross maize (Zea mays L.) hybrid “HC-8080” and a summer weed, jungle rice (Echinochloa colona L.) were assessed in the research laboratory of Agronomy, Faculty of Agriculture, Gomal University, Dera Ismail Khan, KPK, Pakistan. The treatments included: T1: control (untreated check), T2: sorghum aqueous extract at a rate of 5 mL kg-1 soil, T3: sorghum aqueous extract at a rate of 10 mL kg-1 soil, T4: sorghum aqueous extract at a rate of 15 mL kg-1 soil, T5: sorghum powder at a rate of 5 g kg-1 soil, T6: sorghum powder at a rate of 10 g kg-1 soil and T7:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum allelopathy; Germination; Growth; Maize.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100205

Phytotoxic Effect of Aqueous Extracts of Different Plant Parts of Milkweed on Weeds and Growth and Yield of Wheat
Provedor de dados: Planta Daninha
Autores: SHAH,R.H.; BALOCH,M.S.; ZUBAIR,M.; KHAN,E.A.
ABSTRACT: The present research work was undertaken to find out the phytotoxic effects of different concentrations of aqueous extracts of leaves, stems and root of milkweed (Calotropis procera) in the Agronomic Research Area of Department of Agronomy, Faculty of Agriculture, Gomal University, Dera Ismail Khan, Khyber Pakhtunkhwa (KPK), Pakistan during 2013-14 and 2014-15. The treatments consisted of different concentrations of aqueous leaf, stem and root extracts (10, 20, 30 and 40%) of milkweed, which were compared with tap water (control). The results showed that the reduction of all studied parameters, including weeds, growth and yield of wheat was proportional to the concentration of aqueous extracts of milkweed in use. The level of inhibition was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytotoxicity; Calotropis procera; Aqueous extracts; Weed density; Growth; Yield; Wheat.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100279

Allelopathic Effects of Invasive Prosopis juliflora on Grass Species of Potohar Plateau, Pakistan
Provedor de dados: Planta Daninha
Autores: QAYYUM,A.; RAFIQ,M.K.; ZAHARA,K.; BIBI,Y.; SHER,A.; RAFIQ,M.T.; AZIZ,R.; MANAF,A.
ABSTRACT The present study was conducted to investigate the allelopathic effects of Prosopis juliflora (Sw.) DC. (Mesquite) on various growth parameters of three promising grass species (Cenchrus ciliaris, Panicum antidotale and Panicum maximum) on the Potohar Plateau, Pakistan, under nursery conditions. The experiment was carried out under a completely randomized design with two factors and three replicates. Different concentrations of the foliage aqueous extract of P. juliflora were prepared and their effect was studied on root length, shoot length, fresh and dry biomass of tested grass species. All grass species showed a concentration dependent inhibition. However, among all grasses, C. ciliaris was affected most severely whereas P. antidotale was the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Cenchrus ciliaris; Panicum antidotale; Panicum maximum; Growth.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100322

Response of Arabica Coffee Cultivars to Competition from Beggarticks
Provedor de dados: Planta Daninha
Autores: BORGES,L.G.M.; MIRANDA,F.R.; BORGES,A.M.; SILVA,J.R.O.; CAMPOS,A.A.V.; RONCHI,C.P.
ABSTRACT: The goal of this study was to analyze the response of Arabica coffee cultivars grown under three levels of Bidens pilosa (beggarticks) interference. At 30 days after transplanting (DAT) of 14 Arabica coffee cultivars into 11 L pots, beggarticks was seeded in the pots and soon after emergence, three levels of weed infestation were established: none, low (two plants per pot), and high (five plants per pot). Treatments were arranged in a 14 × 3 factorial scheme under a completely randomized design, with four replicates. Coffee plant growth was evaluated at both weed emergence and blossoming (90 DAT) when the experiment was completed. Regardless beggarticks infestation levels, significant effects of cultivars occurred on almost all the coffee growth...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bidens pilosa; Coffea arabica; Weed competition; Cultural control; Growth; Integrated weed management.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100159

Weeds under the canopies of tree species submitted to different planting densities and intercropping
Provedor de dados: Planta Daninha
Autores: Souza,A.D; Silva,P.S.L; Oliveira,O.F; Dantas,I.M; Morais,P.L.D.
Assessing the growth and floristic composition of species that grow under the canopy of trees is important for weed control (WC). The objective of this study was to assess two experiments (E1 and E2), when the trees were two years and one year of age, respectively. In E1, sabiá (S) and gliricidia (G) were submitted to planting densities from 400 to 1.200 plants ha-1. In E2, growing systems consisting of S, G, and neem (N) combinations were compared: SSS, GGG, NNN, GSG, NSN, SGS, NGN, SNS, and GNG (each letter represents a row of plants). A random block design was adopted, with three (E1) and four (E2) replicates. In E1, treatments were arranged as split-plots (species in plots). In E2, the degrees of freedom for treatments (8) were partitioned into growing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mimosa caesalpiinifolia; Gliricidia sepium; Azadirachta indica; Growth; Floristic composition; Understory.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000100004

Application of Plant Growth Regulators to Stipa krylovii in the Xilin Gol Grassland
Provedor de dados: Planta Daninha
Autores: JUN,L.V.; XUE-FENG,Z.; ANJUM,S.A.; JI-XUAN,S.; YAN,Z.; YU-FENG,D.; ZOHAIB,A.; ALI,I.; YU,XU; XIU-JUAN,H.; SAN-GEN,W.
ABSTRACT: Plant growth regulators are an immense group of substances that have the ability to alter growth pattern of plants and can be used for improving plant growth and productivity. A study was conducted in the Xilin Gol grassland of Inner Mongolia, China, to ascertain the growth and biomass production of Stipa krylovii in response to exogenous application of different growth regulators at various concentrations viz. naphthalene acetic acid (NAA), 6-benzylaminopurine (6-BA), brassinosteroid (BR), sodium nitrophenolate (SNP) and forchlorfenuron, and gibberellic acid (GA3). Application of growth regulators significantly enhanced the growth and biomass production of S. krylovii. The height of vegetative shoot was enhanced mostly by the application of 100...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Pastures; Biomass production.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100251

WHY IS AGRICULTURAL LABOUR PRODUCTIVITY HIGHER IN SOME COUNTRIES THAN OTHERS?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Gutierrez,   Luciano.
Agriculture productivity varies dramatically in different regions of the world. Using recent theories of economic growth and new data sets (Larson and al., 1999) as a guide, this study finds some empirical regularities between agricultural labour productivity growth, investment and education, as also for environmental factors, for 44 countries during the period 1980-1993. We find strong evidence that where agricultural investment and educated people rates are higher, agricultural labour productivity grows faster. Secondly, geographical factors as well as freer trade influence growth.  Finally, we find evidence of conditional convergence, which means that cross-country agricultural productivity does not converge to the same level of steady state but that...
Tipo: Conference Paper or Presentation
Palavras-chave: Growth; Labour productivity; Convergence; Labor and Human Capital; Productivity Analysis.
Ano: 2000
URL: http://purl.umn.edu/21741

Environmental Policy, Education and Growth: A Reappraisal when Lifetime Is Finite
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Pautrel,   Xavier.
This article demonstrates that when finite lifetime is introduced in a Lucas (1988) growth model, the environmental policy may enhance growth both in the short- and the long-run, while pollution does not influence educational activities, labor supply is not elastic and human capital does not enter the utility function. This is because finite lifetime and the appearance of newborns at each date creates a turnover of generations which disconnects the aggregate consumption growth to the interest rate. We show that the shorter is the horizon, the greater the effect of the environmental policy on growth, because the higher the “generational turnover effect”. We also demonstrate that when time is not the single production factor in education, the environmental...
Tipo: Working or Discussion Paper
Palavras-chave: Growth; Environment; Overlapping Generations; Human Capital; C; O.
Ano: 2008
URL: http://purl.umn.edu/42146

Potential Impacts of a Green Revolution in Africa – the Case of Ghana
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Breisinger,   Clemens; Diao,   Xinshen; Thurlow,   James; Al-Hassan,   Ramatu M.
Agricultural growth in Africa has accelerated, yet most of this growth has been driven by land expansion. Land expansion potential is reaching its limits, urging governments to shift towards a green revolution type of productivity-led growth. Given the huge public investments required, this paper aims to assess the potential impacts of a green revolution. Results from a CGE model for Ghana show that green revolution type growth is strongly pro-poor and provides substantial transfers to the rest of the economy, thus providing a powerful argument to raise public expenditure on agriculture to make a green revolution happen in Africa.
Tipo: Conference Paper or Presentation
Palavras-chave: Agriculture; Green Revolution; Growth; Poverty; Africa; Ghana; CGE; Agricultural and Food Policy; International Development; D58; O13; O55.
Ano: 2009
URL: http://purl.umn.edu/51086

Employment and Growth Effects of Tax Reforms
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Michaelis,   Jochen; Birk,   Angela.
This paper explores how revenue-neutral tax reforms impact employment and economic growth in a model of endogenous growth and search frictions on the labor market. We analyze how savings and the incentive to create new jobs are affected by tax swaps between wage income taxes, payroll taxes, capital income taxes and taxes levied on capital costs. In our framework, the payroll tax is found to be neutral. If this tax is used to finance a cut in the capital income tax, we will observe an increase in both growth and, via the capitalization effect, employment. Most other tax reforms, however, imply a trade-off between employment and growth.
Tipo: Working or Discussion Paper
Palavras-chave: Search unemployment; Growth; Tax reform; Public Economics; E6; H2; J6; O4.
Ano: 2004
URL: http://purl.umn.edu/26275

The Long Trace of Inequality: Evidence from Cundinamarca, Colombia
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Galan,   Juan Sebastian.
This paper uses historic data from Cundinamarca, Colombia to empirically assess the impact of land inequality persistence, inherited from the colonial rule, on economic development in the long run. Based on the Engerman &amp; Sokoloff hypothesis and the use of GIS, I use plausible exogenous variation in land endowments to design an instrumental variable strategy. In contrast to recent studies, I find that more unequal municipalities in the XIX and XX century are associated with better growth, human capital and public goods provision measures today. Political economy channels instead of agricultural productivity gains can explain these results. In municipalities where land was historically more concentrated, powerful landowners were more successful in...
Tipo: Working or Discussion Paper
Palavras-chave: Land inequality; Growth; Public goods; Political economy; Land Economics/Use; O13; D31; N36.
Ano: 2011
URL: http://purl.umn.edu/107398

DINÂMICA DA AGRICULTURA NO ESTADO DE SÃO PAULO ENTRE 1990-2005: Uma análise através do modelo “shift share”
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Felipe,   Fabio Isaias; Maximiano,   Maria Lucia.
Este trabalho tem o objetivo de determinar quais foram as fontes de crescimento da produção agrícola no Estado de São Paulo entre 1990 e 2005. Para essa análise utilizou-se o modelo econométrico denominado “shift-share”, também conhecido como estrutural-diferencial. A análise foi dividida em subperíodos, tendo como objetivo abordar o comportamento da produção agrícola em diversos momentos da economia brasileira. Os fatores que explicam a evolução da produção nos subperíodos determinados foram os efeitos área, rendimento e localização geográfica. As alterações na área cultivada por sua vez foram subdivididas em efeito escala e substituição. A mandioca foi a cultura que apresentou maior crescimento da produção agrícola entre 1990 e 1995, o que se deu em...
Tipo: Conference Paper or Presentation
Palavras-chave: São Paulo; Shift-share; Produção; Crescimento; Efeitos; Shift share; Production; Growth; Effects; Productivity Analysis.
Ano: 2008
URL: http://purl.umn.edu/108832

Factors Influencing Growth of Dairy Product Manufacturing in the United States
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Asiseh,   Fafanyo; Devadoss,   Stephen; Bolotova,   Yuliya; Foltz,   John C.; Haggerty,   Robert J.
www.ifama.org
Tipo: Journal Article
Palavras-chave: Dairy product manufacturing; Growth; United States; Farm Management; Livestock Production/Industries; Production Economics.
Ano: 2010
URL: http://purl.umn.edu/93347

Trends and Spatial Distribution of Public Agricultural Spending in Zambia: Implication for Agricultural Productivity Growth
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Govereh,   Jones; Malawo,   Emma; Lungu,   Tadeyo; Jayne,   Thomas S.; Chinyama,   Kasweka; Chilonda,   Pius.
This paper assesses the level and composition of the Zambia’s public expenditures in the agricultural sector from 2000 to 2008. By measuring the size of public agricultural expenditures, the study will answer whether the Government of Zambia met CAADP’s target of allocating 10% of national budget to agriculture in 2008. Furthermore, examining what the fund is being spent on will shed light on the extent to which spending contributes to agricultural growth. This review will also characterize the spatial patterns of expenditures across provincial boundaries. The results of this work will hopefully lay a foundation for future analysis of  the impacts of public agricultural spending on sector performance.
Tipo: Report
Palavras-chave: Food security; Policy; Zambia; Africa; Public finance; Growth; International Development; Research and Development/Tech Change/Emerging Technologies; Q18.
Ano: 2009
URL: http://purl.umn.edu/54497

Forces behind China's Surging Trade: Competitiveness or Policy Driven?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Somwaru,   Agapi; Tuan,   Francis C.; Gehlhar,   Mark J.; Diao,   Xinshen; Langley,   Suchada V.
This paper delves into China's differential growths in trade flows with high income countries by focusing on bilateral content of trade data over the time period 1962-2005.  Unlike other studies, we account for end use of traded goods ranging from primary, intermediate, and finished goods because China's policies impact all segments China's trade flows.  China's trade growth patterns with major high income countries clearly indicate that the adjacency-neighborhood partners alone is unlikely to explain its unprecedented growth in exports and imports.  China's outstanding performance in trade growth can be traced back to the 1970s with changes in its policies and increased involvement in the international segmentation of production processes and preferential...
Tipo: Conference Paper or Presentation
Palavras-chave: China; International trade; Growth; Policies; International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/9907

Bringing the Poor into a Growth Agenda: What Role for Africa’s Rural Nonfarm Economy?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Haggblade,   Steven.
Distributed as: Appendix 1. Background Paper for Agriculture and Lands. African Ministers Meeting, April 2009. Prepared under the Food Security III Cooperative Agreement (GDG-A- 00-02-00021-00) between the Department of Agricultural, Food, and Resource Economics, Michigan State University, and the United States Agency for International Development (USAID).
Tipo: Report
Palavras-chave: Agriculture; Growth; Poor; Food security; Food Security and Poverty; Q12.
Ano: 2009
URL: http://purl.umn.edu/57446

Agricultural Credit Interest Rate Equalization Policy: A Growth Subsidy?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Castro,   Eduardo Rodrigues de; Teixeira,   Erly Cardoso.
The Brazilian Interest Rate Equalization System (IRES) subsidizes farmers by providing them with credit at lower than market interest rates. The objective of this research is to evaluate the IRES by comparing its monetary cost with its benefits as measured by Brazilian GDP growth. Estimates are carried out using input-output matrix. The results suggest that each Brazilian real spent by IRES to assist Brazilian family farms increases Brazilian GDP by R$ 1.75 and that each real spent to assist commercial farms increases GDP by R$ 3.57. The IRES is a subsidy that generates economic growth greater than its cost to society.
Tipo: Conference Paper or Presentation
Palavras-chave: IRES subsidy; Growth; Input-output matrix; Agricultural Finance; Q18; C67; O40; H81.
Ano: 2006
URL: http://purl.umn.edu/25358

Recursive Sustainability: Intertemporal Efficiency and Equity
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Knapp,   Keith C.
PV-optimality in a capital-resource economy can imply decreasing utility over some portion of the time horizon. Various criteria have been proposed to maintain intergenerational equity defined as nondeclining utility, but these have some limitations and problems. This paper proposes a new welfare criteria incorporating present value to maintain efficiency, and an equity function with convex costs on declining utility. This criterion is economically efficient, time-consistent and recursive. An extension of dynamic programming to multiple value functions is developed to solve this problem. Increasing the equity weight increasingly eliminates declining portions of utility time paths. Sustainability implies increasing consumption in the early time periods and...
Tipo: Conference Paper or Presentation
Palavras-chave: Growth; Environment; Intergenerational equity; Dynamic programming; Research Methods/ Statistical Methods.
Ano: 2006
URL: http://purl.umn.edu/21472

SECURITY IS LIKE OXYGEN: EVIDENCE FROM UGANDA
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Zhang,   Xiaobo.
Since the early 1990s, Uganda has been one of Africa’s fastest growing countries. However, at the sub-national level, growth has been uneven due to civil conflict in the northern region. Using a panel of household and community level data, this paper examines the links between security and economic growth. It is found that security is a pre-condition for successful economic development and that there is in fact a threshold level of security below which public investments in infrastructure and education have little impact on growth. Only when security exceeds this threshold do public investments stimulate economic growth. Economists and policy advisors living in peaceful countries often prescribe economic policies that hinge on the assumption of good...
Tipo: Working or Discussion Paper
Palavras-chave: Security; Civil Strife; Growth; Poverty; Uganda; Africa; International Development; Political Economy.
Ano: 2004
URL: http://purl.umn.edu/16172

Total Factor Productivity Growth and the Environment: A Case for Green Growth Accounting
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Xepapadeas,   Anastasios; Tzouvelekas,   Vangelis; Vouvaki,   Dimitra.
We examine whether the use of the environment, proxied by CO2 emissions, as a factor of production contributes, in addition to conventional factors of production to output growth, and thus it should be accounted for in total factor productivity growth (TFPG) measurement and deducted from the .residual. A theoretical framework of growth accounting methodology with environment as a factor of production which is unpaid in the absence of environmental policy is developed. Using data from a panel of 23 OECD countries, we show that emissions. growth have a statistically significant contribution to the growth of output, that emission augmenting technical change is present along with labor augmenting technical change, and that part of output growth which is...
Tipo: Working or Discussion Paper
Palavras-chave: Solow Residual; Total Factor Productivity Growth; Growth; Environment; Green Growth Accounting; Environmental Economics and Policy; O47; Q2.
Ano: 2007
URL: http://purl.umn.edu/9319

Institutions and Development: A View from Below
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Pande,   Rohini; Udry,   Christopher R.
In this paper we argue the case for greater exploitation of synergies between research on specific institutions based on micro-data and the big questions posed by the institutions and growth literature. To date, the macroeconomic literature on institutions and growth has largely relied on cross-country regression evidence. This has provided compelling evidence for a causal link between a cluster of ‘good’ institutions and more rapid long run growth. However, an inability to disentangle the effects of specific institutional channels on growth or to understand the impact of institutional change on growth will limit further progress using a cross-country empirical strategy. We suggest two research programs based on micro-data that have significant potential....
Tipo: Working or Discussion Paper
Palavras-chave: Institutions; Growth; Cross-country regressions; Institutional and Behavioral Economics; International Development; O11; O12; O17; P51.
Ano: 2005
URL: http://purl.umn.edu/28468

A Dynamic CGE Model: An Application of R&amp;D- Based Endogenous Growth Model Theory
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Diao,   Xinshen; Elbasha,   Elamin H.; Roe,   Terry L.; Yeldan,   A. Erinc.
An R&amp;D based endogenous growth - applied general equilibrium model is developed from an underlying analytical model which combines Romer's capital variety with Grossman and Helpman's multi-sector open economy model. The transitional dynamics of the analytical model are derived. For numerical implementation, a time discrete empirical model, with an Armington structure, is fit to East Asian data of the social accounting matrix variety. Simulations of trade reform are performed and their static and dynamic effects compared. The transition paths of the state variables are found to have a half-life of five to six periods. A solution of the Social Planner's problem, and interventions which seek to obtain this outcome from the decentralized model are also...
Tipo: Working or Discussion Paper
Palavras-chave: Applied General Equilibrium; Trade; Growth; International Relations/Trade; F11; 031; 041.
Ano: 1996
URL: http://purl.umn.edu/7461

Brazilian Agricultural Credit Interest Rate Equalization Policy: A Growth Subsidy?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Castro,   Eduardo Rodrigues de; Teixeira,   Erly Cardoso.
The Brazilian Interest Rate Equalization System (IRES) subsidizes farmers by providing them with credit at lower than market interest rates. The objective of this research is to evaluate the IRES by comparing its monetary cost with its benefits as measured by Brazilian GDP growth. Estimates are carried out using input-output matrix. The results suggest that each Brazilian real spent by IRES to assist Brazilian family farms increases Brazilian GDP by R$ 1.75 and that each real spent to assist commercial farms increases GDP by R$ 3.57. The IRES is a subsidy that generates economic growth greater than its cost to society.
Tipo: Conference Paper or Presentation
Palavras-chave: IRES subsidy; Growth; Input-output; Agricultural and Food Policy; Q18; C67; O40; H81.
Ano: 2005
URL: http://purl.umn.edu/24694

CONVERGENCE IN U.S. TFP GROWTH FOR AGRICULTURE: IMPLICATIONS OF INTERSTATE RESEARCH SPILLOVERS FOR FUNDING AGRICULTURAL RESEARCH
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: McCunn,   Alan; Huffman,   Wallace E.
This paper examines state agricultural total factor productivity (TFP) data, 1950-1982, for evidence of convergence, i.e., TFP growth rates of the future are inversely related to the TFP level at the starting data.  After finding evidence of convergence, the paper examines the contributions of public and private R&amp;D to convergence and presents implications for a more efficient organization of public agricultural research.  For example, we find that increasing a states own investment in public agricultural research reduces the rate of TFP convergence but larger public investments in surrounding areas that potentially spillin increase the rate of convergence.  Also, the results imply that the average rate of convergence in our best fitting model is about...
Tipo: Working or Discussion Paper
Palavras-chave: Convergence; Total factor productivity; States; Spillins; Growth; Public research; Agriculture; Research and Development/Tech Change/Emerging Technologies.
Ano: 1998
URL: http://purl.umn.edu/18266

Trade, Technique and Composition Effects: What is Behind the Fall in World-Wide SO2 Emissions 1990-2000?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Grether,   Jean-Marie; Mathys,   Nicole A.; de Melo,   Jaime.
Replaced with revised version of paper 10/18/07.
Tipo: Working or Discussion Paper
Palavras-chave: Trade; Growth; Environment; Decomposition; Embodied Emissions in Trade; Transport; International Relations/Trade; F11; Q56.
Ano: 2007
URL: http://purl.umn.edu/7448

Fiscal Deficits, Inflation and Economic Growth in a Successful Open Developing Economy
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Tan,   Eu Chye.
This paper primarily seeks to establish whether long- and short-run relationships prevail between fiscal deficits on one hand and inflation and economic growth on the other in a developing economy such as Malaysia. The Malaysian economy has gained international acclaim as one of the successfully managed. Econometric methodology involving the Johansen cointegration and Granger causality techniques and annual data spanning generally from 1966 through 2003 have been mobilized for the purpose. The empirical results suggest that fiscal deficits could have an inflationary impact on the Malaysian economy as they are being monetized though no long run relationship exists amongst fiscal deficits, money supply and the price level. Fiscal deficits also appear to have...
Tipo: Journal Article
Palavras-chave: Deficits; Growth; Inflation; International Development; E60; H30; H61; H62.
Ano: 2006
URL: http://purl.umn.edu/50285

Firm Heterogeneity, Contract Enforcement, and the Industry Dynamics of Offshoring
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Naghavi,   Alireza; Ottaviano,   Gianmarco I.P.
We develop an endogenous growth model to study the long run consequences of offshoring with firm heterogeneity and incomplete contracts. In so doing, we model offshoring as the geographical fragmentation of a firm’s production chain between a home upstream division and a foreign downstream one. On the positive side, we show that, when contracts are incomplete, the possibility of offshoring has favorable implications for economic growth. Yet, offshoring induced by a higher bargaining power of the upstream division can hamper growth: while there is always a positive correlation between upstream bargaining weight and offshoring activities, there is a non-monotonic relationship between these and growth. Whether offshoring with incomplete contracts also...
Tipo: Working or Discussion Paper
Palavras-chave: Offshoring; Heterogeneous Firms; Incomplete Contracts; Growth; Industry Dynamics; Industrial Organization; D23; F23; L23; O31; O43.
Ano: 2009
URL: http://purl.umn.edu/52542

Inheritance Law and Investment in Family Firms
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Panunzi,   Fausto; Ellul,   Andrew; Pagano,   Marco.
Entrepreneurs may be constrained by the law to bequeath a minimal stake to non-controlling heirs. The size of this stake can reduce investment in family firms, by reducing the future income they can pledge to external financiers. Using a purpose-built indicator of the permissiveness of inheritance law and data for 10,245 firms from 32 countries over the 1990-2006 interval, we find that stricter inheritance law is associated with lower investment in family firms, while it leaves investment unaffected in non-family firms. Moreover, as predicted by the model, inheritance law affects investment only in family firms that experience a succession.
Tipo: Working or Discussion Paper
Palavras-chave: Succession; Family Firms; Inheritance Law; Growth; Investment; Financial Economics; G32.
Ano: 2009
URL: http://purl.umn.edu/50330

Options pour la croissance économique du Mali à travers l’application des sciences et technologies à l’agriculture
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Kelly,   Valerie A.; Carpenter,   Janet; Easterling,   Tom; Kone,   Moctar; McCornick,   Peter G.; McGahuey,   Mike.
Recognizing that science and technology research (S&amp;T) is one of many inputs into the broader development process, USAID/Mali, via its Initiative to End Hunger in Africa, requested an assessment of the current S&amp;T situation in Mali. USAID asked the assessment team to produce a comprehensive strategic options plan for a Malian S&amp;T agenda that would identify priority short-term actions to stimulate uptake of S&amp;T results likely to make significant contributions to the attainment of Mali’s broad development goals, while simultaneously developing a coherent longer-term action plan to maintain and improve the human, physical, and financial capital needed to generate future streams of S&amp;T results. The scope of work for the assessment team...
Tipo: Working or Discussion Paper
Palavras-chave: Mali; Growth; Technology; Food security; Agricultural and Food Policy; Food Security and Poverty; Research and Development/Tech Change/Emerging Technologies; Q16; Q18.
Ano: 2005
URL: http://purl.umn.edu/57069

The Impact of Life Expectancy in Human Capital Accumulation: AIDS
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Huang,   Rui; Fulginiti,   Lilyan E.; Peterson,   E. Wesley F.
A three period overlapping generations model is developed to investigate the impact of shorter life expectancy due to disease, on human capital investment decisions and income growth. This research is particularly relevant to Sub-Saharan Africa given the dramatic reduction in life expectancy due to HIV/AIDS and the potential lasting effects on growth. Our results indicate that as life expectancy shortens so does schooling inducing a lower growth rate of income.  These relationships are even more pronounced for the African continent than for the rest of the world.
Tipo: Conference Paper or Presentation
Palavras-chave: HIV/AIDS; Africa; Life expectancy; Growth; Overlapping generations.; Labor and Human Capital.
Ano: 2003
URL: http://purl.umn.edu/22126

Health and Growth: Causality through Education
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Huang,   Rui; Fulginiti,   Lilyan E.; Peterson,   E. Wesley F.
Replaced with revised version of paper 08/24/09.
Tipo: Conference Paper or Presentation
Palavras-chave: HIV/AIDS; Africa; Life expectancy; Growth; Overlapping generations; Health Economics and Policy; International Development; I18; I20; O15.
Ano: 2009
URL: http://purl.umn.edu/51735

Bioenergy production in Finland and its effects on regional growth and employment
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Simola,   Antti; Kinnunen,   Jouko; Torma,   Hannu; Kola,   Jukka.
Finnish national climate and energy strategy sets the share of renewables in energy use to 38%, and a significant amount of this should be covered by biomass based energy. In 2020 forestry is set to contribute 24 TWh and agriculture 4-5 TWh to energy production. In particular, bioenergy resources are considerable in the rural areas. However, the regional aspects have gone without investigation before this study.   This study is a general equilibrium analysis. We considered only the by-products and waste material from agriculture and forestry as the resources for bioenergy, and only heat and power production were considered as the potential end uses. A regional CGE-model (RegFinDynBio) was used to analyse the impact of increased use of bioenergy potential....
Tipo: Conference Paper or Presentation
Palavras-chave: Bioenergy; Agriculture and forestry; Regional economy; Growth; Employment; CGE-modelling; Agricultural and Food Policy; Institutional and Behavioral Economics; Political Economy.
Ano: 2010
URL: http://purl.umn.edu/90820

Demographic Change and Consumption -- A Long-term Simulation Analysis
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Stiller,   Silvia.
This study investigates the influence of the demographic ageing process in Germany on the long-term economic growth path. For this purpose a macroeconomic simulation model which combines demographic forecasts with a modified Ramsey growth model is applied. Special focus is put on the consumption effects of population ageing and the potential to counter those by rising fertility or permanent immigration. The simulation results illustrate that in the medium and in the long terms per capita consumption is among all demographic scenarios lower than without demographic changes. Permanent immigration can retard the consumption decrease. Rising fertility even reinforces the decline of consumption in the examined period of time. Das Diskussionpapier beschäftigt...
Tipo: Working or Discussion Paper
Palavras-chave: Population Ageing; Consumption; Growth; Labor and Human Capital; E17; E21; J 11.
Ano: 2000
URL: http://purl.umn.edu/26252

The Impact of CAFTA on Employment, Production and Poverty in Honduras
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Morley,   Samuel A.; Nakasone,   Eduardo; Pineiro,   Valeria.
In this paper we develop a dynamic CGE model to examine the impact of CAFTA on production, employment and poverty in Honduras. We model four aspects of the agreement: tariff reductions, quotas, changes in the rules of origin for maquila and more generous treatment of foreign investment. We first show that trade liberalization under CAFTA has a positive effect on growth, employment and poverty but the effect is small. What really matters for Honduras is the assembly (maquila) industry. CAFTA liberalized the rules of origin for imports into this industry. That raises the growth rate of output by 1.4% and reduces poverty by 11% in 2020 relative to what it would otherwise have been. Increasing capital formation through an increase in foreign investment in...
Tipo: Working or Discussion Paper
Palavras-chave: CAFTA; Honduras; Growth; Poverty; CGE model; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/42349

Regional Convergence in the European Union (1985-1999): A Spatial Dynamic Panel Analysis
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Badinger,   Harald; Muller,   Werner G.; Tondl,   Gabriele.
We estimate the speed of income convergence for a sample of 196 European NUTS 2 regions over the period 1985-1999. So far there is no direct estimator available for dynamic panels with strong spatial dependencies. We propose a two-step procedure, which involves first spatial filtering of the variables to remove the spatial correlation, and application of standard GMM estimators for dynamic panels in a second step. Our results show that ignorance of the spatial correlation leads to potentially misleading results. Applying a system GMM estimator on the filtered variables, we obtain a speed of convergence of 6.9 per cent and a capital elasticity of 0.43.
Tipo: Working or Discussion Paper
Palavras-chave: Growth; Convergence; Spatial dependence; Spatial filtering; Dynamic panels; GMM; Community/Rural/Urban Development; C23; O00; R11.
Ano: 2002
URL: http://purl.umn.edu/26329

Diversifikation und Wachstum landwirtschaftlicher Unternehmen
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Weiss,   Christoph R.; Thiele,   Holger D.
The liberalization of agricultural markets has increased the interest of farmers (as well as those working on policies concerned with their welfare) in agricultural diversification strategies. However, empirical research on diversification in European agricultural markets is very limited. This paper follows OUSTAPASSIDIS (1992) and investigates the relationship between different diversification strategies and farm performance (farm growth rates). The results of fixed– and random-effect models for approx. 3900 farms in Schleswig-Holstein for the period 1988/89–1997/98 show that diversification into related products increases growth rates whereas the opposite applies for diversification into unrelated products. Initial farm size has a significant and...
Tipo: Journal Article
Palavras-chave: Diversification; Growth; Farm size; Dynamic panel data analysis; Farm Management.
Ano: 2002
URL: http://purl.umn.edu/98120

Local Food Marketing: Factors for Growth of Small Agri‐food Businesses in the UK
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Hingley,   Martin; Boone,   Julie; Haley,   Simon.
This study aims to understand local food and explore the barriers to development for small innovative food businesses. Research was conducted through depth interviews and a survey in North‐West England. Results indicate that small business success can be subjective and performance dependent on business aims. Identified were issues concerning access to finance, burden of regulations and the need for support from industry networks and government. Lack of an official and recognised definition of the term “local food” had implications for marketing strategy. Small businesses recognise that customers are increasingly concerned with food provenance and traceability, but that they and their representative associations need to do more to make these links.
Tipo: Conference Paper or Presentation
Palavras-chave: Local; Food; Small‐business; Growth; UK; Agribusiness; Agricultural and Food Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Research Methods/ Statistical Methods.
Ano: 2010
URL: http://purl.umn.edu/100458

Biofuels, Poverty, and Growth: A Computable General Equilibrium Analysis of Mozambique
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Arndt,   Channing; Benfica,   Rui M.S.; Tarp,   Finn; Thurlow,   James; Uaiene,   Rafael N.
This paper assesses the implications of large-scale investments in biofuels for growth and income distribution. We find that biofuels investment enhances growth and poverty reduction despite some displacement of food crops by biofuels. Overall, the biofuel investment trajectory analyzed increases Mozambique’s annual economic growth by 0.6 percentage points and reduces the incidence of poverty by about six percentage points over a 12-year phase-in period. Benefits depend on production technology. An outgrower approach to producing biofuels is more pro-poor, due to the greater use of unskilled labor and accrual of land rents to smallholders, compared with the more capital-intensive plantation approach. Moreover, the benefits of outgrower schemes are enhanced...
Tipo: Working or Discussion Paper
Palavras-chave: Bio-fuels; Growth; Poverty; Mozambique; Africa; Agricultural and Food Policy; International Development; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/52004

Spatial Development
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Desmet,   Klaus; Rossi-Hansberg,   Esteban.
We present a theory of spatial development. A continuum of locations in a geographic area choose each period how much to innovate (if at all) in manufacturing and services. Locations can trade subject to transport costs and technology diffuses spatially across locations. The result is an endogenous growth theory that can shed light on the link between the evolution of economic activity over time and space. We apply the model to study the evolution of the U.S. economy in the last few decades and find that the model can generate the reduction in the employment share in manufacturing, the increase in service productivity in the second part of the 1990s, the increase in land rents in the same period, as well as several other spatial and temporal patterns.
Tipo: Working or Discussion Paper
Palavras-chave: Dynamic Spatial Models; Growth; Innovation; Land Rent Evolution; Structural Transformation; Technology Diffusion; Trade; Community/Rural/Urban Development; E32; O11; O18; O33; R12.
Ano: 2010
URL: http://purl.umn.edu/59852

Qualification-Mismatch and Long-Term Unemployment in a Growth-Matching Model
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Birk,   Angela.
How does technical progress affect long-term unemployment? The relationship between long-term unemployment and the rate of growth attributable to technical progress is evaluated in a growth-matching-model with heterogeneous jobless workers and with endogenously determined long-term unemployed resulting from skill-depreciation. For innovation economies characterized by high steady-state levels of capital intensities the model shows that, due to a capitalization effect and a qualification-mismatch effect, increasing technological progress has adverse implications for long-term unemployment. Furthermore, for imitation economies with low steady-state capital intensities increasing technological progress can be either favorable or less favorable for long-term...
Tipo: Working or Discussion Paper
Palavras-chave: Long-term unemployment; Mismatch; Growth; Search; Matching; Labor and Human Capital; E24; J41; O41.
Ano: 2001
URL: http://purl.umn.edu/26181

Sustainable growth rate in the strategic analysis of brewery industry
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Daszynska-Zygadlo,   Karolina; Slonski,   Tomasz.
An analysis of sustainable growth rate could considerably improve an assessment of Strategic Business Unit’s potential. The sustainable growth rate analysis enabled us to compare a possible growth rate within the brewery industry with a growth rate that firms had achieved. To demonstrate this in more depth, we presented a case study of the brewery industry in Poland and Czech Republic.
Tipo: Journal Article
Palavras-chave: Growth; Strategic analysis; Seer industry; Corporate growth; Research and Development/Tech Change/Emerging Technologies; GA; IN.
Ano: 2010
URL: http://purl.umn.edu/96858

Do Government Payments Influence Farm Size and Survival?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Key,   Nigel D.; Roberts,   Michael J.
Using farm-level data from the 1987, 1992, and 1997 Census of Agriculture, this study estimates what effect agricultural payments have had on the likelihood of farm business survival and on farm size. The unique panel data set permits conditioning current farm size on past farm size, which removes much of the individual heterogeneity of farms that could be spuriously correlated with payment levels. Results indicate that between consecutive censuses, past per acre payments have a significant positive effect on farm business survival and a small yet significant influence on the size of continuing farms.
Tipo: Journal Article
Palavras-chave: Agricultural payments; Exit rate; Farm size; Growth; Payment limits; Survival; Agricultural and Food Policy; Agricultural Finance; Farm Management.
Ano: 2007
URL: http://purl.umn.edu/8645

Does Corporate Social Responsibility Affect the Performance of Firms?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Poddi,   Laura; Vergalli,   Sergio.
Over the last two decades in OECD countries increasingly more firms are certifying as Socially Responsible (CSR is the acronym for Corporate Social Responsibility). This kind of certification is assigned by private companies that guarantee that a certain firm’s behaviour is environmentally and sociologically correct. Some papers (including Preston and O’Bannon, 1997; Waddock and Graves, 1997; McWilliams and Sieger, 2001; Ullman, 1985) tried to establish if there exists a link between Social Responsibility certification and the performance of firms. Their results were ambiguous and did not show any common connection. This ambiguity depends mainly on the static nature of their analyses and on the problem of whether performance is affected more by...
Tipo: Working or Discussion Paper
Palavras-chave: Corporate Social Responsibility; Growth; Institutional and Behavioral Economics; M14; C23; O10.
Ano: 2009
URL: http://purl.umn.edu/52531

Does Composition of Government Spending Matter to Economic Growth?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Yu,   Bingxin; Fan,   Shenggen; Saurkar,   Anuja.
This paper assesses the impact of the composition of government spending on economic growth in developing countries. We use a dynamic GMM model and a panel data set for 44 developing countries between 1980 and 2004. We find that the various types of government spending have different impact on economic growth. In Africa, human capital spending contributes to economic growth whereas in Asia, capital formation, agriculture and education has strong growth promoting effect. In Latin America, none of government spending items has significant impact on economic growth. Our results are robust regardless of model specifications and instruments chosen.
Tipo: Conference Paper or Presentation
Palavras-chave: Government expenditure; Growth; GMM; Agricultural and Food Policy; Financial Economics; International Development; H5; O1; C232.
Ano: 2009
URL: http://purl.umn.edu/51684

Explaining Growth in Dutch Agriculture: Prices, Public R&amp;D, and Technological Change
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Jongeneel,   Roelof A.; Ge,   Lan.
This paper analyzes the sources of growth of Dutch agriculture (arable, meat, and dairy sectors). Because the time series data (1950-1997) are non-stationary and not cointegrated, it is argued that a model estimated in first differences should be used. Estimated price elasticities turn out to be very inelastic, both in the short-run and the long-run. The direct distortionary effect of price support has therefore been rather limited. However, price support has an important indirect effect by improving the sectors investment possibilities and therewith the capital stock. Public R&amp;D expenditure mainly affected agriculture by contributing to yield improvement therewith favoring intensification of production.
Tipo: Conference Paper or Presentation
Palavras-chave: Growth; Technology; Cointegration; Non-stationarity; Agricultural policy; Agribusiness; Q18; O13.
Ano: 2005
URL: http://purl.umn.edu/24573

THE IMPACT OF ALTERNATIVE DEVELOPMENT STRATEGIES ON GROWTH AND DISTRIBUTION: SIMULATIONS WITH A DYNAMIC MODEL FOR EGYPT
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: El-Said,   Moataz; Lofgren,   Hans; Robinson,   Sherman.
Addressing longer-term issues of economic development in Egypt, the paper employs a dynamically recursive computable general equilibrium (CGE) model to assess the outcomes associated with two types of development approaches over the period 1998-2012. One is a targeted sector development approach, and the second is a more broad-based development approach. Under the first development approach technological advancement is separately targeted to three sectors: agriculture, food processing, and textiles. Each sectoral choice is intended to represent alternative development strategies which we label (i) agricultural-demand- led industrialization (ADLI); (ii) food-processing-based (FOOD); and (iii) textile-based industrialization (TEXTILE). Under the second...
Tipo: Working or Discussion Paper
Palavras-chave: Atkinson inequality index; CGE; Egypt; Growth; Income distribution; SAM; Theil index; International Development; C68; D31; D33; D58; O47; O53.
Ano: 2001
URL: http://purl.umn.edu/16311

Consumption Growth and Agricultural Shocks in Rural Madagascar
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Thomas,   A.-C.; Gubert,   F.; Frahan,   Bruno Henry de.
The aim of this paper is to evaluate the effect of rainfall and agricultural shocks on consumption growth in Madagascar. We are also interested in the impact of local endowments in infrastructures and social services on consumption growth. To achieve this goal, a micro model of household consumption growth is estimated thanks to household panel data collected by the Reseau des Observatoires Ruraux (ROR) between 1999 and 2004. Additional data sources include the 2001 communes census organized by the Ilo program of Cornell University. Altogether these different data sources make an unusually rich data set, at least when considered with developing country standards. We use panel data fixed effect estimation technique to remove unobserved household and...
Tipo: Conference Paper or Presentation
Palavras-chave: Risks; Growth; Poverty; Food Security and Poverty.
Ano: 2008
URL: http://purl.umn.edu/43610

The Impact of CAFTA on Poverty, Distribution, and Growth in El Salvador
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Morley,   Samuel A.; Nakasone,   Eduardo; Pineiro,   Valeria.
In this paper we develop a dynamic CGE model to examine the impact of CAFTA on production, employment and poverty in El Salvador. We model four aspects of the agreement: tariff reductions, quotas, changes in the rules of origin for maquila and more generous treatment of foreign investment. The model shows that CAFTA has a small positive effect on growth, employment and poverty. Tariff reduction under CAFTA adds about .2% to the growth rate of output up to 2020. Liberalizing the rules of origin for maquila has a bigger positive effect on growth and poverty mainly because it raises the demand for exportables produced by unskilled labor. We model the foreign investment effect by assuming that capital inflows go directly to capital formation. This raises the...
Tipo: Working or Discussion Paper
Palavras-chave: CAFTA; El Salvador; Growth; Poverty; CGE model; Food Security and Poverty; International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/42356

LABOR PRODUCTIVITY GROWTH AND CONVERGENCE IN THE KANSAS FARM SECTOR: A TRIPARTITE DECOMPOSITION USING THE DEA APPROACH
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Mugera,   Amin W.; Langemeier,   Michael R.
The objective of this paper is to analyze sources of labor productivity growth in the Kansas farm sector over the period 1993-2006 for a sample of 668 farms.  The nonparametric production frontier method is used to decompose labor productivity growth into three components: (1) technological catch-up, (2) technological change, and (3) capital deepening.  Kernel estimation methods are used to analyze the evolution of the entire distribution of labor productivity in the sample period.  We find that labor productivity is primarily driven by capital deepening.  On average, capital deepening is the main source of convergence in productivity and technical change is a source of divergence.  We find little evidence of technological catch-up. The impact of the three...
Tipo: Conference Paper or Presentation
Palavras-chave: Labor productivity; Growth; Technological catch-up; Technological change; Capital deepening; Labor and Human Capital.
Ano: 2008
URL: http://purl.umn.edu/6069

Divergence - Is it Geography?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Straubhaar,   Thomas; Suhrcke,   Marc; Urban,   Dieter.
This paper tests a geography and growth model using regional data for Europe, the US, and Japan. We set up a standard geography and growth model with a poverty trap and derive a log-linearized growth equation that corresponds directly to a threshold regression technique in econometrics. In particular, we test whether regions with high population density (centers) grow faster and have a permanently higher per capita income than regions with low population density (peripheries). We find geography driven divergence for US states and European regions after 1980. Population density is superior in explaining divergence compared to initial income which the most important official EU eligibility criterium for regional aid is built on. Divergence is stronger on...
Tipo: Working or Discussion Paper
Palavras-chave: Threshold estimation; New economic geography; Regional income; Growth; Poverty trap; Regime shifts; Bootstrap; International Development; O41; R11; F12.
Ano: 2002
URL: http://purl.umn.edu/26350

On the Growth Performance of Sub-Saharan African Countries
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Busse,   Matthias.
The article discusses some of the most important reasons for the poor growth performance of most countries in sub-Saharan Africa. While high protection levels in high-income countries in Europe and North America for agricultural trade have been cited as a major impediment for the development of African countries, they are unlikely to play a major role. Rather, a lack of integration into world markets and the relatively poor quality of African institutions are more likely to explain the low growth rates.
Tipo: Journal Article
Palavras-chave: Agriculture; Growth; Institutions; Sub-Saharan Africa; Trade; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Community/Rural/Urban Development; International Development; International Relations/Trade; Political Economy; N17; O43.
Ano: 2010
URL: http://purl.umn.edu/93797

Export Instability, Investment and Economic Growth in Asian Countries: A Time Series Analysis
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Sinha,   Dipendra.
In this study, we look at the relationship between export stability, investment and economic growth in nine Asian countries using time series data. The few previous time series studies in this area have not paid any attention to stationarity and cointegration issues. We find that in most cases, the variables are non-stationary in their levels and not cointegrated. These results raise serious doubts about the results of these studies. The results are not uniform across countries casting doubts about the validity of the numerous cross-section studies. For Japan, Malaysia, Philippines and Sri Lanka, we find a negative relationship between export instability and economic growth. For (South) Korea, Myanmar, Pakistan and Thailand, we find a positive relationship...
Tipo: Working or Discussion Paper
Palavras-chave: Export instability; Growth; Stationarity; Cointegration; Teaching/Communication/Extension/Profession; C22; F49; O11.
Ano: 1999
URL: http://purl.umn.edu/28466

Pollution and the Efficiency of Urban Growth
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Quaas,   Martin F.; Smulders,   Sjak.
We analyze the efficiency of urbanization patterns in a dynamic model of endogenous urban growth with two sectors of production. Production exhibits increasing returns to scale on aggregate. Urban environmental pollution, as a force that discourages agglomeration, is caused by domestic production. We show that cities are too large and too few in number in equilibrium, compared to the efficient urbanization path, if economic growth implies increasing aggregate emissions. If, on the other hand, production becomes cleaner over time (`quality growth') the urbanization path approximates the efficient outcome after finite time.
Tipo: Working or Discussion Paper
Palavras-chave: Cities; Urbanisation; Pollution; Growth; Migration; Sustainable Development; Environmental Economics and Policy; Community/Rural/Urban Development; Q56; R12; O18.
Ano: 2008
URL: http://purl.umn.edu/44225

GROWTH, POLICYMAKING, TRADE AND ECONOMIC DEVELOPMENT IN MALAYSIA
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Salih,   Thamir M.
For the period between 1957 and 1997, Malaysia’s development is analysed to determine the roles of inputs, planning, trade and government intervention in economic activity. Foreign investment is also analysed. During this period, by international standards, growth that Malaysia experienced was impressive. This growth was achieved through a policy framework that used government planning and investment in conjunction with incentives for the private sector. A unique feature of Malaysia’s planning was its call for social justice to advance the economic interest of its less economically privileged population. By adopting amalgam of development strategies and policies, policymakers were successful in improving the socio-economic status of the majority of the...
Tipo: Presentation
Palavras-chave: Economic Development; Export; Growth; Investment; Planning; Sustainability; Country Studies: Malaysia.; Agricultural and Food Policy; International Relations/Trade.
Ano: 2012
URL: http://purl.umn.edu/124437

The Effects of Trade Liberalization of the Environment: An Empirical Study
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: McCarney,   Geoffrey R.; Adamowicz,   Wiktor L.
We seek to contribute to the emerging economic theory on trade, the environment and development. Using panel data across countries, econometric models are estimated to predict the effects of openness on organic water pollutant (BOD) and carbon dioxide (CO2) emissions. Results indicate that freer trade significantly increases emissions of both pollutants, thus reducing environmental quality. Moreover, the panel nature of the data allows heterogeneity across countries to be controlled, so that comparisons can be made of how different national characteristics influence the environmental impact of freer trade. By testing the effects of democratic versus autocratic governance, it is found that while greater democracy can induce significant reductions in BOD...
Tipo: Conference Paper or Presentation
Palavras-chave: Trade; Environment; Growth; Pollution; Governance; Policy; Environmental Economics and Policy; International Relations/Trade; C23; Q53; Q56.
Ano: 2006
URL: http://purl.umn.edu/25297

Multivariate methods in aquaculture research: case studies of tilapias in experimental and commercial systems
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
This volume documents the usefulness of multivariate methods û notably multiple regression, path analysis and canonical correlation û in the context of aquaculture, which has to date tended to neglect such methods, and hence to underutilize available data. All examples used here stem from experimental and/or commercial tilapia culture systems, and hence this book also represents an advance in the understanding of such systems.
Tipo: Report
Palavras-chave: Aquaculture; Tilapia culture; Growth; Multivariate analysis; Farm Management.
Ano: 1993
URL: http://purl.umn.edu/44727

Interactions between National and Regional Development
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Davies,   Sara; Hallet,   Martin.
Williamson (1965) argued that catching up countries experiencing strong national growth tend also to see a widening in regional disparities, whereas in more developed economies strong national growth and falling regional disparities could go hand in hand. We find some evidence of a trade-off between national growth and regional dispersion in the EU's Cohesion countries, notably in Spain and Ireland. We also find some evidence of spread effects in some richer EU Member States, although no inevitable link between lower regional disparities and stronger national growth. The potential policy implications of this analysis are also examined.
Tipo: Working or Discussion Paper
Palavras-chave: Cohesion; Catching up; Growth; EU regions; Regional policy; Community/Rural/Urban Development; O18; R11; R58.
Ano: 2002
URL: http://purl.umn.edu/26187

Regional Income Inequality and Economic Growth: A Spatial Econometrics Analysis for Provinces in the Philippines
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Pede,   Valerien O.; Sparks,   Adam H.; McKinley,   Justin D.
This paper revisits the inequality-growth relationship using data at the sub-national (provincial) level in the Philippines over the period 1991- 2000. A conditional convergence growth model is considered where the growth of per capita income depends on inequality and other growth factors. The contribution of each province to the overall inequality obtained from the Theil index is considered. Results indicate that inequality has a positive and significant effect on per capita income growth. However, the magnitude of the inequality effect is not stable across regions. Geographically Weighted Regression estimates show that the magnitude of the inequality growth relationship varies over a range of 0.72 to 3.36. Other results are also noteworthy in this study....
Tipo: Presentation
Palavras-chave: Clusters; Growth; Inequality; Spatial econometrics; Community/Rural/Urban Development; Research Methods/ Statistical Methods; R11; R12; O15; C21.
Ano: 2012
URL: http://purl.umn.edu/124402

Developing Country Trade: Implications of China’s Changing Trade and Competitiveness in Intensive and Extensive Margin Goods
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Somwaru,   Agapi; Tuan,   Francis C.; Gehlhar,   Mark J.; Diao,   Xinshen; Hansen,   James M.
This paper delves into China’s differential growths in trade flows with high income and developing countries by focusing on bilateral content of trade data over the time period 1978-2005.  Unlike other studies, we account for end use of traded goods ranging from primary, intermediate, and finished goods because China’s policies impact all segments China’s trade flows. In the last 28 years, China has specialized in deficits in the upstream production segments (parts and components) and rapid diversification in consumption goods (extensive margin). While in the late 1970s China’s export and import growth on all goods with major high income countries is outstanding in the most recent years China’s trade growth with developing countries has taken the lead...
Tipo: Conference Paper or Presentation
Palavras-chave: China; International trade; Growth; Intensive; Extensive margins; Developing countries; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/6239

Environmental Policy, Education and Growth with Finite Lifetime: the Role of Abatement Technology
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Pautrel,   Xavier.
This note shows that the assumptions about the abatement technology modify the impact of the environmental taxation (both the size and the “direction”) on the long-run growth driven by human capital accumulation à la Lucas (1988), when the source of pollution is private consumption and lifetime is finite. When the human capital’s share in the abatement services production is higher (respectively lower) than in the final output production, a higher environmental tax reduces (resp. increases) the allocation of human capital in production sectors (abatement service and final output) and boostes (resp. decreases) the BGP rate of growth. When abatement services are produced with the final output, the environmental taxation does not influence growth.
Tipo: Working or Discussion Paper
Palavras-chave: Growth; Environment; Overlapping Generations; Human capital; Finite Lifetime; Abatement; Environmental Economics and Policy; Q5.
Ano: 2010
URL: http://purl.umn.edu/91003

Trade Induced Growth Impacts of Corporate Entry in the Food Sector: A Case Study of Fruits &amp; Vegetables Sub-Sector in the Punjab State of India
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Goel,   Veena.
Study indicated that the entry of corporate sector in the Punjab State is both in retail and wholesale trade of the fruits &amp; vegetables sub sector. At the organized retail stores these companies have provided its consumers a single window service for the various product assortments while within the fruits &amp; vegetables category (have minuscule scales) widened the product selection choices. Corporate entry in wholesale trade has linked several product specific production belts with medium to high income consumers through various market segments such as organized stores, traditional wholesale/retail markets and the food service. These companies have also provided product variety through imports while opportunities for crop diversification towards...
Tipo: Conference Paper or Presentation
Palavras-chave: Fruits &amp; vegetables trade; Corporate groups; Growth; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/115534

Remittances and economic growth in Latin America and the Caribbean: The Impact of the human capital development
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Garcia-Fuentes,   Pablo A.; Kennedy,   P. Lynn.
Remittances are one source of external financing for developing countries that have been increasing in both size and importance as of late. However, the issue about the impact on economic growth from remittances is still opened for discussion. This paper adds to this discussion by investigating the impact of remittances on growth through human capital using a panel data analysis for a sample of 14 Latin American and Caribbean (LAC) countries during the period 1975-2000. The results indicate that remittances have a positive impact on economic growth in the representative countries from the LAC region; however, the realization of this impact holds only when the remittance receiving country has a minimum threshold of human capital stock.
Tipo: Conference Paper or Presentation
Palavras-chave: Remittances; Human Capital; Growth; Latin America and the Caribbean; International Development; International Relations/Trade; Labor and Human Capital.
Ano: 2009
URL: http://purl.umn.edu/46751

Long-Term Unemployment and Subsidizing Vacancies in a Growth-Matching Model
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Birk,   Angela.
How can long-term unemployment be reduced by policy measures of the government? In this paper a growth-matching-model is developed, in which the unemployment pool consists of heterogeneous unemployed workers, short-term and long-term unemployed, and with an endogenous skill-depreciation of the long-term unemployed emerging as technical progress accelerates. For innovation countries characterized by rapid technical progress we show that through subsidizing vacancy creation which causes a substitution and an income effect long-term unemployment can be reduced. Since the positive substitution effect implied by subsidizing vacancy creation outweighs the negative income effect induced by taxing the household's income, a positive employment effect results...
Tipo: Working or Discussion Paper
Palavras-chave: Long-term unemployment; Growth; Search; Matching; Subsidies; Labor and Human Capital; E24; J41; O41.
Ano: 2001
URL: http://purl.umn.edu/26194

CORRUPTION AND OPENNESS
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Neeman,   Zvika; Paserman,   Daniele; Simhon,   Avi.
We consider a neoclassical growth model with endogenous corruption.  Corruption and wealth, which are co-determined in equilibrium, are shown to be negatively correlated.  Richer countries tend to be less corrupt, and corrupt economies tend to be poorer.  This observation gives rise to the following puzzle: If poorer countries do indeed experience higher levels of corruption, and if indeed as suggested by a number of empirical studies corruption hampers growth, then how did rich countries, who were poor once, become rich?  Our answer is simple.  In the past, economies were mostly "closed" in the sense that it was difficult to transfer illicit money outside of the economy.  In contrast, today's economies are mostly open.  In the relatively closed economies...
Tipo: Working or Discussion Paper
Palavras-chave: Corruption; Growth; Openness; International Development; F2; H0; O1; O4.
Ano: 2003
URL: http://purl.umn.edu/14977

Agricultural Trade Liberalisation and Economic Growth in Developing Countries: Analysis of Distributional Consequences
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Ali,   Ershad; Talukder,   Dayal.
The article analyses the impact of agricultural trade liberalisation on economic growth as well as on the welfare of rural livelihoods in developing countries through technological transformation in the agricultural sector. The article, based on existing literature, considers the background and reasons for the policy shift in developing economies away from agricultural protection and toward trade liberalisation. It attempts to shed light on the debate over the distributional consequences resulting from trade liberalisation. It also analyses how agricultural trade policy reforms affect poverty and inequality, since the majority of the population of developing countries is involved with agriculture, and these households are predominantly rural poor and...
Tipo: Journal Article
Palavras-chave: Agriculture; Developing countries; Growth; Inequality; Trade liberalisation; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Community/Rural/Urban Development; Crop Production/Industries; Farm Management; Institutional and Behavioral Economics; International Development; Labor and Human Capital; Land Economics/Use; Political Economy; Research and Development/Tech Change/Emerging Technologies.
Ano: 2010
URL: http://purl.umn.edu/93447

A Politico-Economic Model of Aging, Technology Adoption and Growth
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Lancia,   Francesco; Prarolo,   Giovanni.
Over the past century, all OECD countries have been characterized by a dramatic increase in economic conditions, life expectancy and educational attainment. This paper provides a positive theory that explains how an economy might evolve when the longevity of its citizens both influences and is influenced by the process of economic development. We propose a three periods OLG model where agents, during their lifetime, cover different economic roles characterized by different incentive schemes and time horizon. Agents’ decisions embrace two dimensions: the private choice about education and the public one upon innovation policy. The theory focuses on the crucial role played by heterogeneous interests in determining innovation policies, which are one of the...
Tipo: Working or Discussion Paper
Palavras-chave: Growth; Life Expectancy; Human Capital; Systemic Innovation; Majority Voting; International Development; Research and Development/Tech Change/Emerging Technologies; D70; J10; O14; O31; O43.
Ano: 2007
URL: http://purl.umn.edu/9552

Effects of Clean Water Act Regulations on Firm-Level Decisions in Agriculture
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Sneeringer,   Stacy E.; Key,   Nigel D.
U.S. environmental regulations often vary by the size of the operation, with larger operations facing more regulatory stringency.  When the size distribution of firms is heavily skewed, regulation size thresholds can reduce transaction costs for regulatory agencies while bringing most production within a regulatory framework.  However, size-based regulation may have unintended consequences if operations downsize, slow their growth, or enter at a smaller size in order to avoid regulation.  These unintended consequences from regulation may include less pollution abatement and diminished economic efficiency.  In this study we examine recently revised Clean Water Act (CWA) regulations targeting large-scale livestock operations to identify and quantify farm...
Tipo: Conference Paper or Presentation
Palavras-chave: Livestock; Clean Water Act; Growth; Regulation; Agricultural and Food Policy; Environmental Economics and Policy; Farm Management; Q5.
Ano: 2010
URL: http://purl.umn.edu/61461

Health-enhancing Activities and the Environment: How Competition for Resources makes the Environmental Policy Beneficial
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Pautrel,   Xavier.
In a two-period overlapping generations model, this paper demonstrates that the relationship between the environmental taxation and the economic activity (level- and growth-output) becomes inverted-U shaped, when the detrimental impact of pollution on health and the private decision of each working-age agent to improve her health are taken into account. Especially, a tighter environmental tax is more likely to promote (rather than to harm) output-level and –growth when health is very sensitive to pollution, the weight of health in preferences is high, the polluting capacity of the production technology is high and the rate of natural purification of pollutants is low. The inverted-U shaped relationship between the environmental tax and the economic...
Tipo: Working or Discussion Paper
Palavras-chave: Growth; Environment; Health; Overlapping Generations; Environmental Economics and Policy; Q5.
Ano: 2009
URL: http://purl.umn.edu/55832

The impact of smallholder commercialisation of organic crops on food consumption patterns, dietary diversity and consumption elasticities
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Hendriks,   Sheryl L.; Msaki,   Mark M.
The impact of smallholder commercialisation on food consumption patterns in a rural community of South Africa was investigated. The dietary diversity, nutrient intakes and consumption patterns of certified, partially certified and non-members of an organic farmers’ organisation were compared. Engagement in certified commercial organic farming promoted comparatively greater dietary diversity and improved nutrient intakes. While smallholder agriculture commercialisation has the potential to improve food consumption patterns and food quality through increased income and labour opportunities, caution should be exercised before claiming that such commercialisation can alleviate food insecurity and solve hunger in rural South Africa.
Tipo: Journal Article
Palavras-chave: Agriculture; Growth; Smallholder; Consumption; Nutrition; Food Security and Poverty.
Ano: 2009
URL: http://purl.umn.edu/53383

Promoting global agricultural growth and poverty reduction
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Ivanic,   Maros; Martin,   William J.
Constraints on resources, growth in demand, and a slowdown in agricultural productivity raise concerns that food prices may rise substantially over the next decades. The impacts of such higher prices on the poor and the required mitigating policy responses to this problem remain unclear. This paper uses a global general equilibrium model, projections of global growth and microeconomic household models, to project potential implications for incomes, food production and poverty. We find that higher agricultural productivity would generally lower poverty, with different impacts depending where the productivity growth occurs, while protection policies that reduce imports would generally raise poverty.
Tipo: Conference Paper or Presentation
Palavras-chave: Poverty; Growth; Projections; Agricultural and Food Policy; Farm Management; Land Economics/Use.
Ano: 2010
URL: http://purl.umn.edu/61098

Pollution, Health and Life Expectancy: How Environmental Policy Can Promote Growth
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Pautrel,   Xavier.
This article investigates the influence of environmental policy on growth assuming that the channel of transmission relies on the link between pollution, health and the survival probability, in an overlapping generations model à la Blanchard (1985) where growth is driven by a mechanism à la Romer (1986). We demonstrate that environmental policy has an ambiguous effect on growth in the steady-state when the detrimental impact of pollution on health and lifetime is taken into account: for low levels of taxation, environmental policy promotes growth while it is harmful to growth for high levels. Furthermore, we show that the environmental policy is more likely to promote growth (i.e. it stimulates growth for a wider range of environmental taxes) when public...
Tipo: Working or Discussion Paper
Palavras-chave: Growth; Environment; Overlapping generations; Environmental Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/7434

Microeconomic Approaches to Development: Schooling, Learning, and Growth
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Rosenzweig,   Mark R.
I illustrate the variety of approaches to development issues microeconomists employ, focusing on studies that illuminate and quantify the major mechanisms posited by growth theorists who highlight the role of education in fostering growth. I begin with a basic issue: what are the returns to schooling? I discuss microeconomic studies that estimate schooling returns  using alternative approaches to estimating wage equations, which require assumptions that are unlikely to be met in low-income countries, looking at inferences based on how education interacts with policy and technological changes in the labor and marriage markets. I then review research addressing whether schooling facilitates learning, or merely imparts knowledge, and whether there is social...
Tipo: Working or Discussion Paper
Palavras-chave: Schooling; Development; Growth; International Development; Labor and Human Capital; O11; O15; O33; J24.
Ano: 2010
URL: http://purl.umn.edu/59442

Household Income and Assets in Rural Mozambique, 2002-2005: Can Pro-Poor Growth Be Sustained?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Mather,   David; Cunguara,   Benedito; Boughton,   Duncan.
Ministry of Agriculture and Rural Development, Directorate of Economics, Republic of Mozambique
Tipo: Working or Discussion Paper
Palavras-chave: Africa; Agriculture; Mozambique; Income; Growth; Food Security and Poverty; Q18.
Ano: 2008
URL: http://purl.umn.edu/56072

Employment and Growth Effects of Tax Reforms in a Growth-Matching Model
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Birk,   Angela; Michaelis,   Jochen.
This paper explores how revenue-neutral tax reforms impact employment and economic growth in models of exogenous and endogenous growth and search frictions on the labor market. We show that (i) a cut in the payroll tax financed by an increase in the wage tax lowers both equilibrium employment and the equilibrium growth rate, that (ii) a higher energy tax combined with a cut in wage taxes boosts employment but has an ambiguous effect on growth, and that (iii) a higher energy tax combined with a cut in payroll taxes enhances employment but mitigates economic growth.
Tipo: Working or Discussion Paper
Palavras-chave: Search unemployment; Growth; Tax reform; Labor and Human Capital; Public Economics; E6; H2; J6; O4.
Ano: 2002
URL: http://purl.umn.edu/26324

STIMULATING GROWTH AND MINIMIZING RISK IN AGRICULTURAL LENDING UNDER THE AGRICULTURAL CREDIT GUARANTEE SCHEME FUND (ACGSF) IN BAUCHI STATE, NIGERIA
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Nasiru,   M.; Jibril,   S.A.; Sani,   R.M.; Sabo,   A.M.
This study examined the impact of ACGSF in stimulating growth and minimizing of risk in Agricultural lending in Bauchi State. Forty three (43) farmers were randomly sampled and data collected through the use of structured questionnaire. Data were analyzed using descriptive statistics, correlation and multiple regression analysis. The results showed that farmers farm size increased considerably (P&gt;0. 001) after taking the loan and the farm in come also increased (P&lt;0. 001) after taking the loan for an average of two seasons. The results also showed that the educational level of the farmers does not affect loan amount directly even though there is strong positive correlation between the level of farmers’ education and their ability to meaningfully...
Tipo: Report
Palavras-chave: Growth; Risk; Agriculture; Credit; Agricultural Finance.
Ano: 2005
URL: http://purl.umn.edu/54391

Macroeconomic Policy and Sustainability
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Harris,   Jonathan M.
The trend in mainstream economic thought about macroeconomic policy has been towards minimalism. In the optimistic Keynesian phase of the 1960's, it was assumed that both fiscal and monetary policy were effective tools for macroeconomic management. But the influence of monetarist and New Classical critiques has led to a gradual erosion of theoretical support for activist government policy. First fiscal policy fell by the wayside, perceived as too slow and possibly counterproductive in its impacts. Then New Classical and rational expectations critiques suggested that even monetary policy was ineffective. Thus the role of government policy has been reduced to a cautious effort not to make things worse - in effect a return to an economics of laissez-faire. In...
Tipo: Working or Discussion Paper
Palavras-chave: Macroeconomics; Growth; Equity; Sustainable development; Agribusiness.
Ano: 2001
URL: http://purl.umn.edu/15573

Finance and Cluster-Based Industrial Development in China
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Ruan,   Jianqing; Zhang,   Xiaobo.
The traditional literature emphasizes the causal role of finance in promoting industrial growth. China’s rapid industrialization over the past several decades, which has occurred in the absence of well-functioning financial markets, seems to defy the conventional wisdom. By studying a cashmere sweater cluster in China, this paper argues that rural industrial clustering, as a new business model, lowers the entry barriers of initial capital investment through the division of labor. Within these clusters, enterprises can often acquire trade credits from upstream or downstream firms and obtain informal financing from friends and relatives, and use these funds to mitigate constraints of working capital. These findings help explain China’s rapid...
Tipo: Working or Discussion Paper
Palavras-chave: Industrialization; Cluster; Finance; China; Growth; Financial Economics; International Development.
Ano: 2008
URL: http://purl.umn.edu/42322

Political Persistence, Connections and Economic Growth
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Bellettini,   Giorgio; Berti Ceroni,   Carlotta; Prarolo,   Giovanni.
Using data on a panel of 56 democratic countries in the period 1975-2004, we find evidence of a negative association between political stability and economic growth which is stronger and empirically more robust in countries with high bureaucratic costs. Motivated by these results, which contrast with previous contributions, we develop a model of growth with quality improvements where political connections with long-term politicians can be exploited by low-quality producers to defend their monopoly position and prevent innovation and entry of high-quality competitors. This requires that the incumbent politician remains in office and that the red-tape cost advantage granted by political connections is large relative to the quality upgrade related to...
Tipo: Working or Discussion Paper
Palavras-chave: Political Persistence; Growth; Innovation; International Development; O43.
Ano: 2009
URL: http://purl.umn.edu/55828

Abatement Technology and the Environment-Growth Nexus with Education
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Pautrel,   Xavier.
This article challenges the conventional result that a tighter environmental tax has no long-run effect on human capital accumulation in the presence of pollution arising from final output production. It demonstrates that the technology used in the abatement sector determines the existence and the direction of the growth-effect. A tighter environmental tax rises (respectively reduces) human capital accumulation in the presence of pollution arising from final production, if the abatement sector is relatively more intensive in human (resp. physical) capital than final sector. That result always holds for finite lifetime but for infinite lifetime it only holds when labor supply is endogenous. The transitional impact of a tighter environmental policy is also...
Tipo: Working or Discussion Paper
Palavras-chave: Growth; Environment; Overlapping Generations; Human Capital; Abatement; Research and Development/Tech Change/Emerging Technologies; Q5; Q58.
Ano: 2011
URL: http://purl.umn.edu/101379

The Sophistication and Diversification of the African Agricultural Sector: A Product Space Approach
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Badibanga,   Thaddee Mutumba; Ulimwengu,   John M.
We use the concept of the product space to analyze the key features of the transformation process in Africa with a focus on the agricultural sector. Between 1962 and 2008, we find that both specialization and diversification occur for the overall economy and across sectors. Our findings also confirm that the transformation of the African economy is driven primarily by the increasing specialization of nonagricultural exports. However, the transformation process is still moving more slowly than that of an emerging economy such as Brazil. The index of specialization of agricultural exports grew at a modest annual rate of 2.1 percent between 1962 and 2008, compared to 5.0 percent for nonagricultural exports and 4.1 percent for the overall economy. Although...
Tipo: Working Paper
Palavras-chave: Structural transformation; Diversification; Sophistication; Growth; Export; Africa; Agricultural and Food Policy; Crop Production/Industries; International Development; International Relations/Trade; Production Economics; Research and Development/Tech Change/Emerging Technologies; F19; O14; O33; O40.
Ano: 2012
URL: http://purl.umn.edu/124498

Has Economic Growth in Mozambique Been Pro-Poor?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: James,   Robert C.; Arndt,   Channing; Simler,   Kenneth R.
Using 1996–97 and 2002–03 nationally representative household surveys, we examine the extent to which growth in Mozambique has been pro-poor. While all sections of society enjoyed a rapid annual increase in consumption between the sample periods, the rate of growth in consumption was slightly higher for richer households. This has led to a moderate increase in inequality at the national level, as demonstrated by the rise in the Gini coefficient from 0.40 to 0.42. However, this slight increase in inequality is not statistically significant, and its impact on poverty reduction efforts is small: the poverty headcount would have been 53.0 percent in 2002–03 if all sections of society had enjoyed the mean growth rate in consumption, compared with the 54.1...
Tipo: Working or Discussion Paper
Palavras-chave: Inequality; Poverty; Growth; Mozambique; Food Security and Poverty; International Development.
Ano: 2005
URL: http://purl.umn.edu/59288

Crescimento in vitro de linhagens de coloração vermelha e verde clara de Gracilaria birdiae (Gracilariales, Rhodophyta) em dois meios de cultura: análise de diferentes estádios reprodutivos
Provedor de dados: Revista Brasileira de Botânica
Autores: URSI,SUZANA; PLASTINO,ESTELA MARIA.
Gracilaria sp. é uma das principais macroalgas marinhas atualmente coletadas para produção de ágar no Brasil. Este trabalho objetivou comparar o crescimento in vitro de diferentes estádios reprodutivos tanto de linhagens selvagens (vermelhas), quanto de uma variante cromática (verde clara) de Gracilaria sp., em dois meios de cultura: Von Stosch e Provasoli. Seis linhagens foram selecionadas: gametófitos femininos (F) e masculinos (M), vermelhos (vm) e verde claros (vc); tetrasporófitos vermelhos, porém derivados de cruzamentos distintos, Fvm x Mvm e Fvc x Mvm. As taxas de crescimento avaliadas por 28 dias, foram calculadas a partir de medidas de massa fresca (TCm) e comprimento (TCc). A variante cromática apresentou TCm e TCc inferiores às verificadas para...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gracilaria; Growth; Color strain; Reproductive stage; Culture medium.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000500014

Growth of red and green strains of the tropical agarophyte Gracilaria cornea J. Agardh (Gracilariales, Rhodophyta) in laboratory
Provedor de dados: Revista Brasileira de Botânica
Autores: Ferreira,Luciana B.; Barufi,José B.; Plastino,Estela M.
Gracilaria cornea J. Agardh is an important agarophyte occurring in the western Atlantic Ocean. Green colour individuals of G. cornea were found in a natural population, growing next to red individuals, which were more common. Due to the importance of colour strains in genetic and intraspecific variability studies, this work aimed to characterize the red and green strains evaluating different nutritional and light conditions. Red and green gametophytes were cultivated at 14:10 light: dark cycle, with alternating aeration periods of 30 min. Two different enriched solutions were tested: von Stosch (VSS) at concentrations reduced to 12.5% and 25%; and Provasoli (PES) at concentrations reduced to 25% and 50%, and 100%. Red and green gametophytes were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agarophyte; Colour strain; Gracilaria cornea; Growth; Light.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042006000100017

Effects of iron-ore particles on propagule release, growth and photosynthetic performance of Sargassum vulgare C. Agardh (Phaeophyta, Fucales)
Provedor de dados: Revista Brasileira de Botânica
Autores: NASSAR,CRISTINA A.G.; LAVRADO,HELENA P.; YONESHIGUE-VALENTIN,YOCIE.
The effect of iron-ore particles on the propagule release and growth of Sargassum vulgare C. Agardh was tested under treatments with different concentrations of iron-ore particles: 0.1, 1.0, 10.0 g.L-1 and a solution of 10.0 g.L-1 of filtered iron-ore. Filtered seawater was used as control. Photosynthesis vs. irradiance (P-I) curves were calculated for S. vulgare in the presence of iron-ore and in seawater. There was no significant difference in the number of propagules released by the receptacles or in the percentage of zygote formation among the treatments. The released propagules acted like aggregation centers for the particles, those more heavily coated with iron (10.0 g.L-1) exhibiting the highest sinking velocity (32.6 ± 9.8 mm.s-1). No difference in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Iron-ore; Macroalgae; Net photosynthesis; Sargassum vulgare.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000010

Structure and dynamics of a woody plant community of a tropical semi-deciduous seasonal forest in the "Estação Ecológica do Panga", municipality of Uberlândia, Minas Gerais, Brazil
Provedor de dados: Revista Brasileira de Botânica
Autores: Paiva,Luciana Vieira de; Araújo,Glein Monteiro de; Pedron,Fernando.
Studies of plant community dynamics are essential in understanding the demographic patterns of species since changes in demographic rates can affect the floristic composition and future structure. The purpose of the present study was to analyze the changes in the community structure and floristic composition of woody plants in a tropical semi-deciduous forest in Uberlândia in central Brazil, during a 10-years period. The data were collected in 1989 and in 2000 in 50 quadrats (10 m x 10 m) where all trees with a minimum circumference at breast height of 10 cm were sampled. In 1989, 93 species and 1103 individuals were registered. Over a period of 10 years, seven new species were added to the community, although eight disappeared. The main change that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Mortality; Recruitment; Tropical forest.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000300003

Juvenile dynamics of the endemic and rare Enterolobium glaziovii Benth. (Mimosaceae) around reproductive trees in the Atlantic forest, Brazil
Provedor de dados: Revista Brasileira de Botânica
Autores: Ramos,Flavio N.; Silvia-Matos,Dalva M.; Santos,Flavio A. Maës dos.
Studies on the regeneration and seedling mortality of rare tree species are important, but scarce. The aim of this study was to investigate the annual variation in recruitment, growth and mortality of juveniles of Enterolobium glaziovii Benth., a rare tree species from the Brazilian Atlantic Rain Forest. All seedlings and juveniles around four reproductive trees were labeled and their fate was followed from 1996 to 1999. There were no annual differences in juveniles' recruitment below and beyond the parental crown, but juveniles' survival and growth were lower below than beyond of the parental tree crowns. Small individuals (&lt; 15 cm tall) showed the greatest mortality and the lowest growth, followed by medium (from 15 to 50 cm tall) and large ones (&gt;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conspecific influence; Distance-dependent mortality; Growth; Shade tolerance; Size-dependent mortality.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000400011

Estudo de desenvolvimento de Viguiera robusta Gardn., uma Asteraceae do cerrado
Provedor de dados: Revista Brasileira de Botânica
Autores: Ruggiero,Patricia G. C.; Zaidan,Lilian B. P.
RESUMO - (Estudos de desenvolvimento de Viguiera robusta Gardn., uma Asteraceae do cerrado). Com o objetivo de se conhecer alguns aspectos da fisiologia de plantas do componente herbáceo da vegetação de cerrado, foram estudados aspectos do desenvolvimento de Viguiera robusta. As plantas, obtidas a partir de sementes (aquênios), foram mantidas sob condições fotoperiódicas controladas, acompanhando-se seu crescimento vegetativo e floração, no subseqüente período de crescimento. Os aquênios germinaram melhor sob luz constantes e às temperaturas de 30ºC e 20/30ºC permanecendo viáveis após 12 meses de armazenamento a 5ºC em frascos de vidro fechados. Sob fotoperíodo de 8 h houve menor crescimento vegetativo. A floração ocorre inicialmente nos fotoperíodos mais...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flowering; Growth; Photoperiodism; Cerrado; Viguiera robusta.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041997000100001

Flooding effects in seedlings of Cytharexyllum myrianthum Cham. and Genipa americana L.: responses of two neotropical lowland tree species
Provedor de dados: Revista Brasileira de Botânica
Autores: ANDRADE,ANTÔNIO CARLOS SILVA DE; RAMOS,FLAVIO NUNES; SOUZA,ALEXANDRE FADIGAS DE; LOUREIRO,MARTA BRUNO; BASTOS,RODRIGO.
Six-month-old seedlings of Cytharexyllum myrianthum and Genipa americana, two common tree species in different flood-prone areas in Brazil, were flooded for up to 90 days to compare their survival and growth responses under these conditions. Seedlings of both species were found to be relatively tolerant to flooding but growth responses changed according to treatment and plant species. Growth of G. americana was reduced by flooding, showing a decrease in root and leaf dry mass, root/shoot ratio and height, without showing any adaptive morphological changes. On the other hand, growth of C. myrianthum seedlings was stimulated under flooding conditions, showing an increase in root dry mass, root/shoot ratio, height, stem diameter and some morphological changes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobiosis; Environmental stress; Growth; Hypoxia; Submergence.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500009

Growth and leaf demography of two Cecropia species
Provedor de dados: Revista Brasileira de Botânica
Autores: SANTOS,FLAVIO A.M.
Allometry, growth and leaf demography of two Cecropia species, one with ant mutualist (C. glazioui) and another without it (C. hololeuca), were studied in an Atlantic Rain Forest area in the State of Rio de Janeiro, SE Brazil. Stem diameter was allometrically related to height in both species. Cecropia glazioui showed higher annual growth rates and longer internodes than C. hololeuca. Leaf phenology showed a seasonal pattern in both species, but the number of leaves on each plant was more variable along the year in C. hololeuca than in C. glazioui. Survivorship curves for leaves were intermediate between Deevey's Type I and Type II curves, with young leaves of C. glazioui showing a greater survival rate and life expectancy than those of C. hololeuca. Low...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Atlantic Rain Forest; Cecropia; Growth; Leaf demography.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000200003

In vitro culture at low temperature and ex vitro acclimatization of Vriesea inflata an ornamental bromeliad
Provedor de dados: Revista Brasileira de Botânica
Autores: Pedroso,Andrea Nunes Vaz; Lazarini,Rosmari Aparecida de Morais; Tamaki,Vívian; Nievola,Catarina Carvalho.
(In vitro culture at low temperature and ex vitro acclimatization of Vriesea inflata an ornamental bromeliad). In vitro culture by seeds is a technique for preservation of threatened species because it may provide a large number of plants with genetic diversity. The bromeliad Vriesea inflata (Wawra) Wawra, an ornamental bromeliad, is extensively and illegally collected from the nature and must be preserved. It is possible to form plant threatened collections in vitro by reducing the temperature of culture, while occupying little space, with the consequent reduction of maintenance costs. This work evaluated the influence of temperature on in vitro growth and morphology of plants of V. inflata, with the aim of establishing a slow growth-rate and analyzing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Bromeliaceae; Conservation; Growth; Photosynthetic pigments.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000300004

Effect of nitrate and ammonium on the growth and protein concentration of Microcystis viridis Lemmermann (Cyanobacteria)
Provedor de dados: Revista Brasileira de Botânica
Autores: Rückert,Gabriela Von; Giani,Alessandra.
Cyanobacteria are a very important group in aquatic systems, particularly in eutrophic waters. Therefore studies about their success in the environment are essential. Many hypotheses have tried to explain the dominance of Cyanobacteria, and several emphasized the importance of various nitrogen sources for the success of the group. In this study, we measured the effect of ammonium and nitrate on the growth and protein concentration of Microcystis viridis (Cyanobacteria). This species is well-known because bloom formation in eutrophic waters. The study was carried out, in experimental batch cultures, using the WC medium with different nitrogen sources: ammonium, nitrate, ammonium + nitrate (50% ammonium + 50% nitrate) and ammonium at different concentrations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammonium; Cyanobacteria; Eutrophication; Growth; Nitrate; Protein concentration.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000200011

Crescimento inicial de Euterpe edulis Mart. em diferentes regimes de luz
Provedor de dados: Revista Brasileira de Botânica
Autores: NAKAZONO,ERIKA MATSUNO; COSTA,MARIA CLARA DA; FUTATSUGI,KAORI; PAULILO,MARIA TEREZINHA SILVEIRA.
Plantas sob forte sombreamento (2% ou 6% da luz solar direta) apresentaram, em relação às plantas sob maior nível de luz, menor biomassa, menores taxas de crescimento, menor razão raiz/parte aérea, menor massa foliar específica (MFE), menor razão clorofila a/b e maior razão de área foliar (RAF). Com o aumento da irradiância as plantas apresentaram três tipos de comportamento, dependendo da quantidade de luz dada: 1) até cerca de 20% da luz solar direta as plantas apresentaram, com aumento da luz, aumento de biomassa, das taxas de crescimento relativo (TCR) e de assimilação líquida (TAL), maior alocação de biomassa para a raiz, maior número de folhas, maior MFE, maior razão clorofila a/b e menor razão de peso foliar (RPF) e RAF; 2) entre 20% e 70% de luz as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Light acclimation; Euterpe edulis; Growth.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000200007

Hawthorn (Crataegus Oxyacantha) Extract in the Drinking Water of Broilers on Growth and Incidence of Pulmonary Hypertension Syndrome (PHS)
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Ahmadipour,B; Kalantar,M; Hosseini,SM; Yang,LG; Kalantar,MH; Raza,SHA; Schreurs,NM.
ABSTRACT Hawthorn extract has been used for ameliorating cardiac disorders and pulmonary hypertension. Flavonoids and oligomeric proanthocyanidins are considered to be responsible for the positive health effects of hawthorn extract. The effect of Hawthorn extract in the water supply on feed intake, growth, carcass traits, internal organ weight, cardiac indices, the concentration of serum proteins and the incidence of pulmonary hypertension syndrome was evaluated in broiler chickens. At one day-of-age, 225 chickens were assigned to one of three experimental groups where 0, 0.1 and 0.2 ML of hawthorn extract was added per one liter of drinking water. Feed intake, live weight gain and carcass weight increased when hawthorn extract was included in the drinking...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chicken; Growth; Hawthorn; Pulmonary hypertension; Ascites.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400639

The role of poultry industry in indian economy
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Vetrivel,SC; Chandrakumarmangalam,S.
Poultry farming in India, in spite of several constraints, has progressed considerably during the last decade. The present study has been undertaken to examine various aspects related to the growth and development of poultry production in the country. Poultry production in India was confined to backyards till recently. Local breed of birds were reared for the supply of eggs and meat. The increasing demand for poultry products necessitates augmenting the supply by importing improved breeds of poultry. In 1961, the proportion of hybrid populations in the total population of poultry was about 2 percent. Within a couple of decades, these birds have dominated the market sidelining the indigenous birds. The technological advances have revolutionized the role and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eggs; Supply; Production; Technology; Growth; Population.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400001

Effects of Dietary L-Glutamine or L-Glutamine Plus L-Glutamic Acid Supplementation Programs on the Performance and Breast Meat Yield Uniformity of 42-d-Old Broilers
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Ribeiro Jr,V; Albino,LFT; Rostagno,HS; Hannas,MI; Ribeiro,CLN; Vieira,RA; Araújo,WAG de; Pessoa,GBS; Messias,RKG; Silva,DL da.
ABSTRACT This study aimed at evaluating four dietary L-Glutamine (L-Gln) or L-Gln plus L-Glutamate (L-Glu) supplementation programs on the performance, breast yield, and uniformity of broilers. A total of 2,112 one-d-old male Cobb 500(r) broilers were distributed according to a randomized block design in a 2 × 4 factorial arrangement (L-Gln or L-Gln plus L-Glu × 4 supplementation programs), totaling eight treatments with 12 replicates of 22 broilers each. The supplementation programs consisted of the dietary inclusion or not of 0.4% of L-Gln or L-Gln plus L-Glu for four different periods: 0 days (negative control), 9d, 21d, and 42d. Feed intake (FI, g), body weight gain (BWG, g), feed conversion ratio (FCR, kg/kg), coefficient of variation of body weight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breast; Growth; Non-essential amino acids; Uniformity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015001000093

Body Morphometry and Development of the Digestive System of Grey Partridge (Perdix Perdix) Depending on Age and Gender
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Kokoszyński,D; Biegniewska,M; Wilkanowska,A; Saleh,M; Bernacki,Z; Stęczny,K; Kmiecik,M.
ABSTRACT The experiment used 100 grey partridges (Perdix perdix L.), which were reared first in confinement and later in aviaries. Partridges were lighter and had greater body dimensions at 36 weeks compared to 12 weeks except for trunk length. Older birds showed greater values (p&gt;0.05) of compactness and lower values of massiveness and long-leggedness. Significant differences were found for keel length in females. At 36 weeks, male and female partridges had significantly greater total intestinal length, males had significantly longer small intestine and rectum, and females were characterized by significantly longer caeca and greater (p&lt;0.05) intestine to body length ratio. Older birds had significantly greater gizzard weight and percentage and heart...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body dimensions; Gender; Grey partridge; Growth; Intestine.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400695

Effects of Non-phytate Phosphorus and 1a-Hydroxycholecalciferol on Growth Performance, Bone Mineralization, and Carcass Traits of Broiler Chickens
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Han,JC; Ma,K; Wang,JG; Chen,GH; Zhang,JL; Qu,HX; Yan,YF; Cheng,YH.
ABSTRACT This study evaluated the effects of dietary non-phytate phosphorus (NPP) and 1a-hydroxycholecalciferol (1a-OH-D3) on the growth performance, bone mineralization, and carcass traits of 1- to 21-day-old broiler chickens. On the day of hatch, 600 male Ross 308 chicks were weighed and randomly assigned to 12 treatments, with five cages of 10 birds each. A 6 × 2 factorial arrangement was applied, consisting of 0.20%, 0.25%, 0.30%, 0.35%, 0.40%, or 0.45% NPP and 0 or 5 μg/kg of 1a-OH-D3. The basal diet contained 0.52% calcium (Ca) and was not supplemented with vitamin D3. Dietary NPP levels significantly affected growth performance and tibia mineralization (except width) of broilers; by contrast, meat yield and organ relative weight were not influenced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Non-phytate phosphorus; 1a-hydroxycholecalciferol; Growth; Bone; Broiler chicken.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400503

Influence of Thermally Oxidized Vegetable Oil and Animal Fats on Growth Performance, Nutrient Digestibility, Carcass Parameters and Meat Quality of Broilers
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Kamran,J; Mehmood,S; Mahmud,A; Saima,.
ABSTRACT The current study was planned to investigate the influence of soy oil, oxidized soy oil, poultry oil single refined and poultry oil double refined on the performance of broilers chicken. A total of two hundred and forty, day-old broiler chicks were divided into 4 treatments in such a way that each treatment had six replicates and each replicate had ten chicks. The experimental treatments were separated with the usage of single refined poultry oil, double refined poultry oil, oxidized soy oil and soy oil in the diet of broilers. In both starter and overall periods average body weight was higher (p&lt;0.05) for birds which were on a basal diet containing soy oil as compared to other diets. Similarly, feed intake was higher (p&lt;0.05) for birds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oxidized soy oil; Fresh soy oil; Poultry refined oil; Growth; Digestibility; Broilers.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000200318

Effects of Dietary Zinc Levels on the Growth Performance, Organ Zinc Content, and Zinc Retention in Broiler Chickens
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Zhang,TY; Liu,JL; Zhang,JL; Zhang,N; Yang,X; Qu,HX; Xi,L; Han,JC.
ABSTRACT The objective of this study was to investigate the optimal zinc (Zn) requirement of broiler chickens based on Zn retention. On the day of hatch, 350 male Ross 308 broilers were randomly assigned to seven treatments with five replicates of ten birds each. Zinc was supplemented as ZnSO4·7H2O at 0, 20, 40, 60, 80, 100, or 120 mg/kg in the starter diet (fed from 1 to 21 d of age) and at 0, 16, 32, 48, 64, 80, or 96 mg/kg in the grower diet (fed from 22 to 42 d of age). The analyzed Zn levels were 34.98 and 27.57 mg/kg in the basal starter and grower diets, respectively. Supplemental Zn levels did not influence body weight gain, feed intake, feed conversion ratio, or liver Zn content of broilers at 21 and 42 d of age (p&gt;0.05). Tibia ash Zn content...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler chickens; Growth; Requirement; Retention; Zinc.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100127

Growth and body nutrient deposition of two broiler commercial genetic lines
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Marcato,SM; Sakomura,NK; Munari,DP; Fernandes,JBK; Kawauchi,ÍM; Bonato,MA.
The objective of this work was to study growth and body nutrient deposition profiles of male and female Cobb and Ross broilers using Gompertz equations. A total number of 1,920 one- to 56-day-old broilers were used. A randomized experimental design in a factorial arrangement (2 strains x 2 sex), with 4 replicates of 120 birds each, was applied. Diets were formulated to supply the nutrient requirements recommended by the genetic companies. A sample of birds was weekly weighed and sacrificed after 24 hours fasting. Carcasses were de-feathered and weighed again. The parameters of the Gompertz equation for body weight and its components (water, ashes, protein, and fat) were estimated. An interaction (p&lt;0.05) between sex and breed was observed for mature...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body composition; Broilers; Growth; Gompertz curves.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000200007

A Novel Polymorphism of VLDLR Signal Peptide Coding Region and Its Association with Growth and Abdominal Fat Traits of Gaoyou Domestic Ducks
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Ming-liang,C; Cong,W; Xuan,D; Lu,L; Tang-jie,Z.
ABSTRACT The VLDLR gene plays important roles in the growth and adiposity in humans and mice. The purpose of this study was to investigate the relationship between VLDLR gene genetic polymorphisms and growth and abdominal fat traits of the Gaoyou domestic duck. A total of 267 Gaoyou ducks were employed for testing. A 18bp deletion was identified in VLDLR signal peptide coding region. The results of c2 test suggested that the genotype frequencies of VLDLR signal peptide coding region were not in Hardy-Weinberg equilibrium. Least squares analysis showed that body weight (BW) of -18bp/-18bp genotype ducks was significantly higher than those of other genotypes from six (BW6) (p&lt;0.05) to ten weeks of age (BW10) (p&lt;0.01). The association analysis was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polymorphism; VLDLR; Abdominal fat trait; Growth; Duck.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400577

Effects of Light Intensity on Growth, Anti-Stress Ability and Immune Function in Yellow Feathered Broilers
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Guo,YL; Ma,SM; Du,JJ; Chen,JL.
ABSTRACT An experiment was conducted to investigate the effects of light intensity on growth, anti-stress ability, and immune function of yellow feathered broilers. A total of 480 one-day-old male Lingnan yellow feathered broilers were randomly allocated to 4 treatments based on light intensity (1, 5, 20 and 80 lx) with 8 replicates of 15 chicks each. The experiment lasted for 63 days. Compared with those under high light intensity, broilers exposed to low light intensity had higher (p&lt;0.05) total antioxidant capacity (T-AOC), glutathione peroxidase (GSH-Px), a-Naphthylacetate esterase (ANAE+), antibody titer, but lower (p&lt;0.05) malonaldehyde (MDA) levels and heterophil/lymphocyte ratio (H/L). There was a linear effect for T-AOC(p=0.002),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anti-stress ability; Growth; Immune function; Light intensity; Yellow feathered broilers.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100079

Effect of Egg Weight and Patio Strategies on Hatching Traits and Subsequent Performance of the Broilers
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Yameen,RMK; Hussain,J; Mahmud,A; Saima,.
ABSTRACT Objectives of the present study were to assess the hatchery based interventions and their impact on hatching traits and subsequent performance of broilers. In total, 3000 eggs of Hubbard broiler breeders were equally divided into Small (50-55 g), Medium (56-61 g) and Large (62-70 g) eggs. The eggs from each category were distributed into 20 trays each containing 50 eggs. Each tray was considered as a replicate. At the end of the 18th day of incubation, the eggs of each weight category were divided into four different patio strategies i.e. P0, P3, P5 and P7 where feed and water were provided to the chicks for 0, 3, 5 and 7 days in the hatcher followed by conventional rearing. Data were collected for hatch window, hatching traits, growth, physical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg weight; Patio; Hatch window; Growth; Welfare; Blood biochemistry.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2021000100304

Differential Behavior of Young Eucalyptus Clones in Response to Nitrogen Supply
Provedor de dados: Revista Brasileira de Ciência do Solo
Autores: Ferreira,Eric Victor de Oliveira; Novais,Roberto Ferreira; Pereira,Greice Leal; Barros,Nairam Félix de; Silva,Ivo Ribeiro da.
Eucalyptus requires large amounts of nitrogen (N); however, it responds in diverse manners to the application of this nutrient. The aim of this study was to evaluate the differential performance in growth, mineral nutrition, and gas exchanges of N-fertilized Eucalyptus clones. The treatments consisted of two Eucalyptus clones (VM-01 and I-144) and six N application rates (0, 0.74, 2.93, 4.39, 5.85, and 8 mmol L-1 NH4NO3) arranged in a randomized complete block design with five replications. VM-01 had greater plant height and greater height/collar diameter ratio, as well as higher leaf concentrations of all macronutrients and of Cu, Fe, Mo, and Zn. In terms of total and root dry matter production, root/shoot ratio, and collar diameter, as well as stomatal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gas exchange; Growth; Nutrient solution; Nutritional efficiency.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000300809

Leaf senescence of common bean plants as affected by soil phosphorus supply
Provedor de dados: Revista Brasileira de Ciência do Solo
Autores: Araújo,Adelson Paulo; Kubota,Flavio Yuudi; Teixeira,Marcelo Grandi.
Responses of leaf senescence to P supply could constitute adaptive mechanisms for plant growth under P-limiting conditions. The aim of this study was to evaluate the effects of soil P supply on leaf senescence of common bean (Phaseolus vulgaris L.). Eight P levels, ranging from 5 to 640 mg kg-1 P, were applied to pots containing four bean plants of cultivar Carioca in 10 kg of an Oxic Haplustult soil. Attached leaves were counted weekly, abscised leaves were collected every other day, and seeds were harvested at maturity. The number of live leaves increased until 48 days after emergence (DAE) and decreased afterwards, irrespective of applied P levels. At lower applied P levels, the initial increase and the final decrease of leaf number was weak, whereas at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Harvest index; Ontogeny; Phaseolus vulgaris.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000300010

Nutritional Efficiency of Eucalyptus Clones Under Water Stress
Provedor de dados: Revista Brasileira de Ciência do Solo
Autores: Müller,Caroline; Hodecker,Bárbara Elias Reis; Merchant,Andrew; Barros,Nairam Félix de.
Abstract Plant health and nutrition are strongly influenced by the availability of water. The objective of this study was to evaluate the different patterns of initial growth and nutritional efficiency of ten drought-stressed Eucalyptus clones. Water stress conditions were induced by osmotic stress, by gradual addition of polyethylene glycol 6000 over a 20-day period. Drought stress significantly reduced the dry matter of leaves, roots, and the whole plant as well as the nutritional efficiency of most clones. Clone PL040 was the least efficient in nutrient uptake and use and the most sensitive to drought stress. Interestingly, under drought stress, the drought-tolerant clones generally had high AE (absorption efficiency), but low nutrient UE (use...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tree; Growth; Nutrient use efficiency; Drought stress.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100531

Controlling factors of ‘Caatinga’ and sugarcane evapotranspiration in the Sub-middle São Francisco Valley
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Carvalho,Herica F. de S.; Moura,Magna S. B. de; Silva,Thieres G. F. da; Rodrigues,Carlos T. A.
ABSTRACT In the Sub-middle São Francisco Valley, the main controlling factors of ‘Caatinga’ and irrigated sugarcane ETr were investigated in this study. Between 2015 and 2016, environmental variables were measured by sensors coupled to two micrometeorological towers, one in the preserved ‘Caatinga’ and the other in an irrigated sugarcane crop. Soil moisture and vegetation cover index were also evaluated and biometric data were obtained only in the sugarcane. Actual evapotranspiration was determined based on the latent heat flux, by the energy balance method. Therefore, the ratio between actual and reference evapotranspiration was calculated. Response variables were formed by the actual evapotranspiration and by its ratio with the reference...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Correlation; Micrometeorological variables; Growth.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000400225

Morphological and physiological responses of açaí seedlings subjected to different watering regimes
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Silvestre,Walter V. D.; Pinheiro,Hugo A.; Souza,Rodrigo O. R. de M.; Palheta,Lenilson F.
ABSTRACT Seedlings of açaí obtained from plant material native to floodplains (from Laranjeira and Muaná) and adapted to upland areas (cv. BRS-Pará and ecotype Hideo) were cultivated between March and October 2013 in a greenhouse, to test the hypothesis that water requirement for seedling production varies according to the origin of plant material. The seedlings were subjected to watering regimes corresponding to 40, 70, 100 and 130% of field capacity. Regardless of plant material, the production of vigorous seedlings was feasible only under irrigation of 100 and 130% of field capacity. The seedlings produced under 130% of field capacity showed higher plant height, stem diameter, number of leaves, total leaf area, leaf and root biomass, total plant biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Waterlogging; Growth; Water déficit; Euterpe oleracea.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000400364

Tolerance of castor bean cultivars under salt stress
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Sá,Francisco V. da S.; Paiva,Emanoela P. de; Mesquita,Evandro F. de; Bertino,Antonio M. P.; Barbosa,Marcelo A.; Souto,Lauter S.
ABSTRACT This study aimed to evaluate the tolerance of castor bean cultivars under salt stress during the initial growth stage. The experiment was set in randomized blocks, in a 5 x 4 factorial scheme, resulting in 20 treatments, 5 salinity levels (0.6-control, 1.2, 1.8, 2.4 and 3.0 dS m-1) and 4 castor bean cultivars (BRS Energy, LA Guarani, BRS Gabriela and IAC 028)] with 3 replicates. At 30 days after sowing, plants were evaluated for growth, dry matter accumulation and salt tolerance. Increased salinity levels in the water used for irrigation reduced the growth of all the studied cultivars. The salt tolerance of the studied castor bean cultivars follows the following order: BRS Energia &gt; BRS Gabriela = IAC 028 &gt; LA Guarani.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ricinus communis L.; Growth; Selection germoplasm; Water quality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000600557

Cultivation of cherry tomato under irrigation with saline water and nitrogen fertilization
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Vieira,Ianne G. S.; Nobre,Reginaldo G.; Dias,Adaan S.; Pinheiro,Francisco W. A.
ABSTRACT The study was carried out from August 2013 to January 2014 to evaluate growth and production of cherry tomato cultivated under irrigation with water of different salinity levels and fertilized with different nitrogen (N) doses, in experiment conducted in drainage lysimeters under greenhouse conditions, at the Center for Agrifood Science and Technology of the Federal University of Campina Grande. The statistical design was randomized blocks in a 5 x 4 factorial scheme, with three replicates, and the treatments consisted of five levels of electrical conductivity of water (0.3, 1.5, 2.5, 3.5 and 4.5 dS m-1) and four N doses (60, 100, 140 and 180 mg kg-1). Growth and production variables of cherry tomato decrease linearly from the irrigation water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentum Mill.; Salt stress; Mineral nutrition; Growth.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100055

Mineral fertilization with macronutrients in castor bean, lineage UFRB 222
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Cavalcante,Antonio R.; Lima,Washington B. de; Chaves,Lucia H. G.; Fernandes,Josely D.; Souza,Felipe G. de; Silva,Simone A.
ABSTRACT The study was conducted to evaluate the effect of mineral fertilization on the growth and production of seeds and oil of castor bean (Ricinus communis L.) lineage UFRB 222. The experiment was carried out in a greenhouse of the Centro de Tecnologia e Recursos Naturais at the Universidade Federal de Campina Grande, PB, Brazil. A randomized block design with three repetitions and 14 treatments originated from a Baconian matrix was adopted. Reference doses were 50:300:150 kg ha-1 of N, P2O5 and K2O. At the end of the study, plant height, stem diameter, number of leaves, leaf area, total seed number, total seed weight, total fruit number and oil production per plant were evaluated. On average, the nitrogen dose of 150 kg ha-1 led to adequate values of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ricinus communis L.; Growth; Production; Plant nutrition.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000200106

Application of brassinosteroid to Tabebuia alba (Bignoniaceae) plants
Provedor de dados: Revista Brasileira de Fisiologia Vegetal
Autores: ONO,ELIZABETH ORIKA; NAKAMURA,TERUKO; MACHADO,SÍLVIA RODRIGUES; RODRIGUES,JOÃO DOMINGOS.
The objective of this study was to observe the effects of brassinosteroid, gibberelin, and auxin application on the development and foliar anatomy of Tabebuia alba (Cham.) Sandw. seedlings. T. alba seedlings were grown in plastic bags with fertilized soil and treated with the following: 1- water (control); 2- brassinolide (BR1) 0.104 mM; 3- BR1 0.208 mM; 4- 3-indoleacetic acid (IAA) 0.2854 mM; 5- IAA 0.5708 mM; 6- GA3 (gibberellin A3) 0.1443 mM; 7- GA3 0.2887 mM; 8- GA3 0.072 mM + IAA 0.1427 mM; 9- GA3 0.1443 mM + IAA 0.2854 mM; 10- GA3 0.072 mM + BR1 0.052 mM; and 11- GA3 0.1443 mM + BR1 0.104 mM. Plant height and petiole length were measured before the treatments and 21 days after application of the growth regulators. These data allowed the calculation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tabebuia alba L.; Brassinosteroids; GA3; Auxin; Growth.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312000000300002

Characterization of nutrient deficiency in Hancornia speciosa Gomes seedlings by omitting micronutrients from the nutrient solution
Provedor de dados: Revista Brasileira de Fruticultura
Autores: Bessa,Layara Alexandre; Silva,Fabiano Guimarães; Moreira,Marialva Alvarenga; Teodoro,João Paulo Ribeiro; Soares,Frederico Antônio Loureiro.
Hancornia speciosa Gomes (Mangaba tree) is a fruit tree belonging to the Apocynaceae family and is native to Brazil. The production of seedlings of this species is limited by a lack of technical and nutritional expertise. To address this deficiency, this study aimed to characterize the visual symptoms of micronutrient deficiency and to assess growth and leaf nutrient accumulation in H. speciosa seedlings supplied with nutrient solutions that lack individual micronutrients. H. speciosa plants were grown in nutrient solution in a greenhouse according to a randomized block design, with four replicates. The treatments consisted of a group receiving complete nutrient solution and groups treated with a nutrient solution lacking one of the following...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hancornia speciosa Gomes; Mineral nutrition; Symptoms; Growth.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000200034

HEAVY METALS IN VINEYARDS AND ORCHARD SOILS
Provedor de dados: Revista Brasileira de Fruticultura
Autores: BRUNETTO,GUSTAVO; FERREIRA,PAULO ADEMAR AVELAR; MELO,GEORGE WELLINGTON; CERETTA,CARLOS ALBERTO; TOSELLI,MORENO.
ABSTRACT  The application of foliar fungicides in vineyards and orchards can increase soil concentration of heavy metals such as copper (Cu) and zinc (Zn), up to the toxicity threshold for fruit trees and cover crops. However, some agronomic practices, such as liming, addition of organic fertilizers, cultivation of soil cover crops and inoculation of young plants with arbuscular mycorrhizal fungi can decrease the availability and the potential of heavy metal toxicity to fruit trees. This review aims to compile and present information about the effects of increasing concentrations of heavy metals, especially Cu and Zn, on soils cultivated with fruit trees and provides some agronomic practices of remediation. Information about the sources of heavy metals...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace element; Phytotoxicity; Growth; Fruit trees.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000203001

THE DEVELOPMENT OF CUSTARD APPLE FLOWER BUD UNDER NITROGEN AND POTASSIUM NUTRITION
Provedor de dados: Revista Brasileira de Fruticultura
Autores: SOUZA,IVAN VILAS BÔAS; JOSÉ,ABEL REBOUÇAS SÃO; SILVA,JOSÉ CARLSON GUSMÃO DA; BOMFIM,MARINÊS PEREIRA; JESUS,JECILENE SILVA DE.
ABSTRACT  The custard apple tree (Annona squamosa L.), has increased in cultivation due to good prices in the national market. However, there are few studies regarding the fruit’s nutrition. The aim of this study was to verify the influence of N and K levels in developing the flower buds in two growing cycles, corresponding to the time of high temperatures (spring-summer) and another milder season (autumn-winter). The experiment was conducted in a rural property located in the municipality of Anagé, Bahia, installed in a randomised complete block design with 3 blocks, arranged in a factorial 4 x 4, obtained by the combination of the following levels of N (0, 16.875, 33.750 and 67.500 g plant-1) in the form of urea and K (0, 22.5, 45.0 and 90.0 g plant-1)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annona squamosa L.; Annonaceae; Growth; Nutrition; Floral quality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000202001

Pineapple yield and fruit quality effected by NPK fertilization in a tropical soil
Provedor de dados: Revista Brasileira de Fruticultura
Autores: Spironello,Ademar; Quaggio,José Antonio; Teixeira,Luiz Antonio Junqueira; Furlani,Pedro Roberto; Sigrist,José Maria Monteiro.
There is a lack of information about fertilization of pineapple grown in the State of São Paulo, Brazil. So a field experiment with pineapple 'Smooth Cayenne' was carried out to study the effects of NPK rates on yield and fruit quality. The trial was located on an Alfisol in the central part of the State of São Paulo (Agudos county). The experimental design was an incomplete NPK factorial, with 32 treatments set up in two blocks. The P was applied only at planting, at the rates of 0; 80; 160 and 320 kg/ha of P2 0(5), as superphosphate. The N and K2O rates were 0; 175; 350, and 700 kg/ha, applied as urea and potassium chloride, respectively, divided in four applications during the growth period. Response functions were adjusted to yield or to fruit...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ananas comosus (L.) Merrill; Mineral nutrition; Growth; Soil fertility; Tropics.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452004000100041

Length-weight relationships and prediction equations of body composition of farm raised Astyanax aff. Fasciatus (Actinopterygii: Characiformes: Characidae)
Provedor de dados: Revista Brasileira de Zoologia
Autores: Furuya,Valéria R.B.; Michelato,Mariana; Cruz,Thais P. da; Furuya,Wilson M.
This study ascertains the length-weight relationship and predicts body composition equations in cultivated Astyanax aff. fasciatus. A total of 300 fish were distributed in five groups according to body weight: 1.19 ± 0.18, 3.7 ± 0.70, 7.55 ± 0.97, 12.28 ± 2.32 and 22.16 ± 2.64 g. The length-weight relationship was elaborated using linear (y i = b0 + b1x i) or second-order (y i = b0 + b1x i + b1x i²) regression analysis. The value of the b slope in the length-weight relationship was 3.6971 and the intercept was 0.0031. The prediction equations obtained for body moisture, crude protein, crude lipid and ash were, y = 71.680 - 0.404BW, y = 17.140 - 0.095BW, y = 8.432 +0.364BW and y = 3.720 - 0.032BW, respectively, where BW is the body weight of fish (g). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Fish; Growth; Mathematical modeling; Regression analysis.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000600001

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil
Provedor de dados: Revista Brasileira de Zoologia
Autores: Abrahão,Jolnnye R.; Cardoso,Ricardo S.; Yokoyama,Leonardo Q.; Amaral,A. Cecilia Z.
The population biology and production of the stout razor clam Tagelus plebeius Lightfoot, 1786 were investigated on an intertidal sandflat on the southeast coast of Brazil (Enseada Beach, São Sebastião, state of São Paulo) between April 1997 and April 1998. Two rectangular sites of 50 X 10 m parallel to the waterline were established, site A (upper intertidal level) and site B (middle intertidal level), where the samples were taken in an 0.5 x 0.5 m quadrat. High abundances were recorded in winter and spring, with no significant differences between the sites. The high bivalve abundances were related to the presence of very fine homogeneous sediment with low salinities. Tagelus plebeius had negative allometric growth, characteristic of deep burrowers for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Growth; Intertidal zone; Mortality.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100009

Spatial and temporal variation in population structure of Hemigrammus marginatus (Characiformes: Characidae) in streams of the Ivinhema River Basin, Brazil
Provedor de dados: Revista Brasileira de Zoologia
Autores: Lourenço,Luzia da Silva; Fernandes,Izaias Médice; Súarez,Yzel Rondon.
The present study has assessed spatial and temporal variations in the length structure of Hemigrammus marginatus Ellis, 1911 and estimated growth parameters for the species. Sampling was carried out in five streams in the Vitória and Piravevê sub-basins of the Ivinhema River from January to December 2002. A total of 933 specimens of H. marginatus were caught (97 in the Vitória sub-basin and 836 in the Piravevê sub-basin). Mean length of the individuals caught in the Piravevê sub-basin was shorter (21.58 mm, SD = 4.67) than that of individuals caught in the Vitória sub-basin (29.24 mm, SD = 4.42). Analysis of condition factor calculated from the weight/length relationship revealed that the values were constant both spatially (between sub-basins) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Growth; Mortality; Recruitment; Weight-length relationship.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000400003

Dinâmica populacional da matrinxã Brycon amazonicus (Characidae) na Amazônia Central
Provedor de dados: Revista Brasileira de Zoologia
Autores: Santos Filho,Leocy C. dos; Batista,Vandick da S.
The matrinxã, Brycon amazonicus (Spix &amp;amp; Agassiz, 1829) is one of the most important fishery resources of the Amazonas state. Its population dynamics in Central Amazon was analyzed based on total landing and biometry data registered in the main landing port of Manaus, between 1994 and 2002. Growth and mortality rates were estimated separately for the rivers Purus, Madeira and Solimões. Differences in size structure and growth curves suggest that different population units exist among these rivers, requiring individualized evaluation and fisheries management strategies. The analysis of the yield per recruit does not indicate overexploitation. However, the highest relative exploitation rate was observed in the Madeira river. The suggested management...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fisheries; Growth; Mortality; Stock.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000200001

Redescription of megalopa and juvenile development of Pachygrapsus gracilis (Decapoda: Grapsidae) from the Amazon region, reared in the laboratory
Provedor de dados: Revista Brasileira de Zoologia
Autores: Arruda,Danielle C. B; Abrunhosa,Fernando A.
This present study re-describes the megalopa stage and provides detailed morphological descriptions and main growth changes observed in stages I through VII of the juvenile instars of the dark shore crab Pachygrapsus gracilis (Saussure, 1858), from the Amazon region. The specimens in this study were reared in the laboratory and the megalopae were collected at Ajuruteua beach in northeastern Pará, Brazil. Previous studies had described the megalopa of P. gracilis from Mexican waters, as well as those of Pachygrapsus transversus (Gibbes, 1850) and Pachygrapsus marmoratus (Fabricius, 1787). A comparison between the Mexican and Amazonian populations of P. gracilis revealed significant morphological differences. The main difference is the presence of 3...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Description; Growth; Morphology; Transitory stage.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400008

Great unexpected differences between two populations of the intertidal crab Neohelice granulata inhabiting close but contrasting habitats (Crustacea: Decapoda: Brachyura)
Provedor de dados: Revista Brasileira de Zoologia
Autores: Spivak,Eduardo D.; Bas,Claudia C.; Luppi,Tomás A.
ABSTRACT Two populations of the Southwestern Atlantic burrowing crab, Neohelice granulata (Dana, 1851), are separated by only 190 km. They inhabit bays that drain into a Patagonian gulf in the southernmost limit of the geographical distribution of the species: San Antonio Bay (SAO) and San José Gulf (RSJ). The population from SAO has been extensively studied, whereas that of RSJ has not. The main goal of this study is to compare the ecological and habitat characteristics of the two populations, based on samples collected on successive days during the middle of the reproductive season of the crab. The substrate of SAO is composed of a high proportion of gravel and scarce organic matter, whereas the substrate of RSJ presents twice as much silt and clay, and...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Argentine; Estuaries; Crab; Fecundity; Feeding; Growth; Maturity; Sediment.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000604001

Nursery performance of the pink shrimp Farfantepenaeus paulensis (Crustacea: Decapoda: Penaeidae) postlarvae in different salinities
Provedor de dados: Revista Brasileira de Zoologia
Autores: Costa,Rafael F.; Yasumaru,Fanny A.; Lemos,Daniel.
Nursery performance, development, and RNA:DNA ratio were investigated in Farfantepenaeus paulensis (Pérez-Farfante, 1967) postlarvae acclimated from a salinity of 30‰ to higher (35‰) or lower (16, 22 and 29‰) salinities and reared for 20 days. Overall, higher final weight, yield and growth rate were observed at a salinity of 29‰. RNA:DNA ratio indicated reduced growth potential at a salinity of 35‰. Low salinities resulted in more developed individuals. Thus, early postlarval F. paulensis should not be stocked in salinities higher than that of the original hatchery, otherwise in lower salinities postlarvae should be older and/or have an extended nursery phase. Results may assist in the development of nursery rearing protocols for F. paulensis, an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Crustacean; Development; Growth.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300001

Early weaning and concentrate supplementation on the performance and metabolic profile of grazing lambs
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Fernandes,Sergio Rodrigo; Monteiro,Alda Lúcia Gomes; Dittrich,Rosangela Locatelli; Salgado,Jordana Andrioli; Silva,Cláudio José Araújo da; Silva,Marina Gabriela Berchiol da; Beltrame,Olair Carlos; Pinto,Pedro Henrique Nicolau.
This study was designed to investigate the effect of early weaning and concentrate supplementation on performance and metabolic profile of lambs in four production systems on pasture: suckling lambs not supplemented until slaughter; suckling lambs supplemented with concentrate in creep feeding until slaughter; early weaned lambs not supplemented until slaughter; early weaned lambs supplemented with concentrate until slaughter. Performance was assessed by average daily gain (ADG) and body condition score (BCS) measurements. Metabolic profile was delineated by measuring serum albumin, urea, creatinine, cholesterol, glucose and aspartate aminotransferase. Weaning reduced ADG by 92 g/d and the ADG for weaned and suckling lambs were 113 g/d and 205 g/d,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Average daily gain; Concentrate feed; Energy; Growth; Protein; Suckling.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500029

Phytase in diets for Nile tilapia in the growth period
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Bock,Claudio Luiz; Pezzato,Luiz Edivaldo; Cantelmo,Osmar Angelo; Barros,Margarida Maria.
This research was carried out to compare the effect of phytase on performance, in the incorporation and excretion phosphorus in Nile tilápia. Four diets were used: one standard (contol), composed by 3,200 DE kcal ED/kg of ration and 30.0% CP and supplemented with phosphorus (4.0% of dicalcium phosphate), considering the treatment control, and others three, without phosphorus supplementation, with different phytase levels (1,000, 1,500, and 2,000 uf/kg), with four replication, per a period of 82 days. Circular tanks of fiber glass, with constant flow and aeration were used. The results demonstrated that the use of phytase in diets for fish production can reduce the levels of inorganic phosphorus in the diets and minimizing the impacts caused by phosphorus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Excretion; Fish; Growth; Oreochromis niloticus; Phosphorus; Pollution.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982007000700001

Intake, performance, digestibility, microbial efficiency and carcass characteristics of growing Nellore heifers fed two concentrate levels
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Gionbelli,Mateus Pies; Valadares Filho,Sebastião de Campos; Detmann,Edenio; Paulino,Pedro Veiga Rodrigues; Valadares,Rilene Ferreira Diniz; Santos,Tathyane Ramalho; Silva,Luiz Fernando Costa e; Magalhães,Felipe Antunes.
The objective of this study was to evaluate nutrients and dry matter intake, average daily gain, feed efficiency and digestibility of diets, microbial efficiency, cold carcass yield and basic cuts yields of young Nellore heifers receiving two concentrate levels. Nineteen heifers with initial average weight of 165.6±29.8 kg were used. Three animals were used in a trial to determine the digestibility and microbial efficiency of the two levels of concentrate (225 and 450 g/kgDM) and a treatment with a restricted intake maintenance level. The remaining 16 heifers were confined for 168 days for evaluation of performance and intake, divided into two levels of concentrate. Every 42 days, four animals, two from each concentrate level, were slaughtered to determine...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef heifers; Concentrate level; Feedlot; Growth; Maturity; Weight gain.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500023

Dietary phosphorus requirement of pejerrey fingerlings (Odontesthes bonariensis)
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Rocha,Cleber Bastos; Portelinha,Mauro Kaster; Fernandes,João Morato; Britto,Aline Conceição Pfaff de; Piedras,Sérgio Renato Noguez; Pouey,Juvêncio Luís Osório Fernandes.
To determine the available phosphorus requirement of pejerrey fish, four semi-purified diets were formulated to contain increasing available phosphorus levels (0.90, 2.7, 5.7 and 8.3 g/kg). Each diet was assigned to groups of 10 fish with average weight of 1.26±0.17 g, distributed into a completely randomized design with four treatments and four replications. Fish were fed at a rate of 10% total biomass four times a day for 60 days. The parameters productive performance, body chemical composition and mineral composition of bones and scales were evaluated. The best productive performance of fingerlings was obtained with the diet containing 4.3 g/kg available phosphorus. The average level of 6.3 g/kg available phosphorus promotes better mineralization of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bone; Fish; Food; Growth; Mineral; Nutrition.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000200001

Replacement of fish meal by protein soybean concentrate in practical diets for Pacific white shrimp
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Soares,Mariana; Fracalossi,Débora Machado; Freitas,Luiz Eduardo Lima de; Rodrigues,Marysol Santos; Redig,Joselle Cursino; Mouriño,José Luiz Pedreira; Seiffert,Walter Quadros; Vieira,Felipe do Nascimento.
ABSTRACTThe objective of this work was to evaluate the performance of Litopenaeus vannameifed different levels (0, 25, 50, 75, and 100%) of soybean protein concentrate (63.07% crude protein, CP) to replace fish meal-by product (61.24% CP). The study was conducted in clear water in fifteen 800 L tanks equipped with aeration systems, constant heating (29 ºC), and daily water exchange (30%). Each tank was stocked with 37.5 shrimp/m3 (3.03±0.14 g). Feed was supplied four times a day, at 6% of the initial biomass, adjusted daily. After 42 days, the weight gain of shrimp fed diets with 0 and 25% protein replacement was higher than that observed in shrimp fed 100% replacement, and there were no differences among those fed the other diets. Feed efficiency and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Growth; Litopenaeus vannamei; Nutrition; Protein replacement.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015001000343

Effect of stock density of cultured Amazon Apple Snail Pomacea dolioides (Gastropoda: Ampullariidae) in Brazil
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Pires-Júnior,Amilcar Nogueira; Hattori,Gustavo Yomar; Sant'Anna,Bruno Sampaio.
ABSTRACT This study evaluated the biomass gain, specific growth rate, absolute weight gain, and survival rate of the gastropod Pomacea dolioides cultivated in different stocking densities. To perform the experiment, samples were collected in March and June 2015. A total of 40 adult specimens were collected in the Jauary neighborhood (03°08′19.9"S, 58°27′32.5"W), municipality of Itacoatiara, AM, Brazil. They were kept in the laboratory for breeding to obtain the young P. dolioides, which were distributed into tanks containing 4 L of water and an aeration system, in three densities: 2.5 animals/L, 5 animals/L, and 10 animals/L, and were fed fish ration (34% gross protein). The specimens were measured for shell length and weight every fifteen days. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Growth; Mollusk; Stock enhancement.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100153

Requirement for maintenance and gain of crude protein for two genotypes of growing quails
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Jordão Filho,José; Silva,José Humberto Vilar da; Costa,Fernando Guilherme Perazzo; Albino,Luiz Fernando Teixeira; Melo,Thiago de Sousa; Lacerda,Patrícia Barbosa de; Dantas,Gabriela Mafra; Soares,Rejane Pontes.
The objective of this study was to estimate the requirements for maintenance and gain of crude protein in Japanese and European quails aged 16-36 days. To determine the maintenance requirements, one experiment was conducted in a completely randomized design with four decreasing feeding levels (100, 75, 50 and 25%) and four replicates per treatment. The method of comparative slaughter was used, through a feeding assay. A total of 352 quails from each strain were housed by supply level in 16 pens measuring 1.0 × 1.5 m, totaling 22 birds per cage under ambient temperature conditions (26±0.5 ºC). To estimate the requirement gains, one experiment was conducted with five groups of quails fed ad libitum and housed under controlled temperature of 18 ºC. All...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Modeling; Protein; Quail genotypes.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900012

Dietary protein and energy requirements of juvenile freshwater angelfish
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Zuanon,Jener Alexandre Sampaio; Salaro,Ana Lúcia; Moraes,Sofia Simões Silveira; Alves,Leandro Moreno de Oliveira; Balbino,Eric Márcio; Araújo,Erick Siqueira.
Dietary protein and energy requirements of juvenile freshwater angelfish (Pterophyllum scalare) were evaluated. A 3 × 2 factorial design was used, with three dietary crude protein levels being tested (26, 30, and 34% of CP) combined with two digestible energy levels (3,100 and 3,300 kcal DE/kg of diet) in three replicates. Juveniles averaging 2.33 ± 0.26 g were reared in a 25L-aquarium with controlled temperature (26 ± 1ºC), biological filter and stocking density of six fish/aquarium. Fish were fed ad libitum at 09:00 a.m., 2:00 p.m. and 4:30 p.m. The following performance parameters were evaluated: final weight, final length, weight gain, feed intake, feed conversion ratio, specific growth rate, protein efficiency ratio and condition factor. Fish fed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Ornamental fish; Productive performance; Protein/energy ratio; Pterophyllum scalare.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000600003

Biometric parameters of adult and growing Pêga donkeys
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Moreira,Camilla Garcia; Menezes,Madalena Lima; Nunes,Tamires Romão; Mota,Thais Pagotti; Balieiro,Júlio Cesar de Carvalho; Oliveira,Chiara Albano de Araujo; Brandi,Roberta Ariboni.
ABSTRACT This study aimed at establishing the morphological characteristics and morphometric indexes of Pêga donkeys, utilizing 47 animals, of which 22 were adults and 25 were growing donkeys. Prior to taking their measurements, the animals were restrained and made to stand squarely. The morphological data were measured, and the following morphometric indexes were determined: body index (BI), meloscopic index (MI), dactylothoracic index (DTI), weight in cannon index (WCI), conformation index (CFI), and real live weight (RLW). The experimental design was subdivided into plots and repeated in time, in which the animals represented the plot and the data collection times were the subplots. No sex effect was noted for the morphological measurements and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Equidae; Growth; Morphometry; Morphology.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100517

Estimation of the total efficiency of metabolizable energy utilization for maintenance and growth by cattle in tropical conditions
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Henrique,Douglas Sampaio; Vieira,Ricardo Augusto Mendonça; Malafaia,Pedro Antônio Muniz; Mancini,Maurício Cordeiro; Gonçalves,André Luigi.
Data of 320 animals were obtained from eight comparative slaughter studies performed under tropical conditions and used to estimate the total efficiency of utilization of the metabolizable energy intake (MEI), which varied from 77 to 419 kcal kg-0.75d-1. The provided data also contained direct measures of the recovered energy (RE), which allowed calculating the heat production (HE) by difference. The RE was regressed on MEI and deviations from linearity were evaluated by using the F-test. The respective estimates of the fasting heat production and the intercept and the slope that composes the relationship between RE and MEI were 73 kcal kg-0.75d-1, 42 kcal kg-0.75d-1 and 0.37. Hence, the total efficiency was estimated by dividing the net energy for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergetics; Growth; Net energy; Ruminants.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982005000300034

Linking dietary energy and skeletal development in the horse
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Staniar,William Burton.
Athletic production is what is sought from the horse. As mammary development is important to the dairy cow, skeletal development is important to horses meeting their production goals. As any integrative physiologist will appreciate, the variables that come together to result in optimal skeletal development are complex. Nutrition is one of these, and it contains two broad variables; the supply of dietary nutrients and energy. This presentation will focus on dietary energy and its links with skeletal development. I propose that it is not simply the amount of dietary energy, but the way and from that that energy is supplied that impacts skeletal development. Through an understanding of how dietary energy impact skeletal development, more precise feeding...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cartilage; Equine; Glucose; Growth; Insulin; Somatotropic axis.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300016

Effect of restricted feeding and realimentation on feed performance and carcass characteristics of growing lambs
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Abouheif,Mohamed; Al-Owaimer,Abdullah; Kraidees,Mansour; Metwally,Hassan; Shafey,Tarek.
Forty Najdi ram lambs weighing 26.6±0.3 kg were utilized in this experiment to determine the effects of feed restriction followed by realimentation and body weight at the onset of feed restriction (30 and 36 kg body weights) on performance and carcass characteristics; feeding and restriction levels were ad libitum, 0.75 and 0.60 of the ad libitum intake. All lambs were slaughtered after 14 weeks of experimentation. The results showed that, during the feed restriction phase, average daily gain (ADG) and feed efficiency decreased as the level of restriction increased. During the realimentation phase, the 30 kg lambs gained weights and consumed dry matter (DM) similarly to the ad libitum group, whereas the ADG for the 36 kg lambs of both 0.75 and 0.60 ad...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Compensation; Growth; Limited feeding; Refeeding; Sheep.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000200003

Growth curve of buffalo grazing on a grass pasture
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Alves,Teresa Cristina; Franzolin,Raul.
ABSTRACTThe objective of this study was to evaluate the performance of 17 buffaloes (Mediterranean), from birth to slaughter age (720 days) with monthly measures of weight, thoracic perimeter, body length, and height at withers. At the end of experimental period, the animals were separated into two different groups for statistical analysis according to slaughter weight: light body weight (LBW, mean 517 kg) and heavy body weight (HBW, mean 568 kg). Buffalo growth occurs in the same way up to weaning age, and after that, two distinct groups grow in different forms in the same conditions of management and feeding. Body weight can be estimated according to age, thoracic perimeter, height, and length, showing high correlations. Buffaloes show growth in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body weight; Growth; Performance.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000900321

The effect of non-genetic factors on the early body weights of Tunisian local goats
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Mabrouk,Ouni; Sghaier,Najari; Costa,Roberto Germano; Amor,Gaddour; Amel,Ammar Elgaaied; Delgado,Juan Vicente.
It was evaluated in this study the environmental effects on body weights of goat kids from birth to 150 days of age of Tunisian local goat population, on the basis of 1,656 records obtained from the Arid Areas Institute of Médenine, Tunisia, during 2001-2005. Except for birth weight, individual records were adjusted for standard ages (30, 60, 90, 120 and 150 days) using either extrapolation or interpolation on field data. Data were analyzed by GLM procedure and SNK (α = 0.05) means comparison test. The kidding year (2001-2005), kidding month (December, January, February, and March), birth type (single and twins), sex (male and female), coat colour of kid and age of dam (2-10 years) were definied as non-genetic factors. Results showed that mean values and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arid zone; Birth type; Environmental; Growth; Kids.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000500023

Energy and protein nutritional requirements for Nellore bulls
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Silva,Luiz Fernando Costa e; Valadares Filho,Sebastião de Campos; Zanetti,Diego; Rotta,Polyana Pizzi; Marcondes,Marcos Inácio; Prados,Laura Franco; Paulino,Mário Fonseca; Azevedo,Henrique de Oliveira.
The objective of this study was to determine the nutritional requirements of energy and protein and estimate the efficiencies of metabolizable energy utilization for fat and protein deposition, as well as for maintenance (k m) and growth (k g). An experiment of comparative slaughter was carried out with thirty-seven 14-month-old (±1 month) Nellore bulls with 259±24.9 kg. Animals were divided as follows: five to reference, four to maintenance level and twenty-eight bulls feeding ad libitum. Bulls were also grouped in 4 different feedlot periods (42, 84, 126 and 168 days) for slaughter. The diet was composed of corn silage and concentrate, at a 55:45 ratio. After the slaughter, the left half carcasses were totally dissected for determination of body...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deposition; Efficiency; Growth; Maintenance; Metabolizable energy.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600028

Carcass quality, parts and tissue development of lambs finished in three systems
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Hashimoto,Juliano Hideo; Osório,José Carlos da Silveira; Osório,Maria Teresa Moreira; Bonacina,Marlice Salete; Lehmen,Rosilene Inês; Pedroso,Carlos Eduardo da Silva.
The objective of this study was to evaluate the effect of finishing systems on natural pasture and gender on the carcass quality, parts and tissue development of lambs. Forty-five non-castrated males and forty-five females were distributed in a completely randomized design into three treatments: lamb with mother kept on pasture; weaned lamb kept on pasture and weaned lamb kept on pasture with supplementation (soybean hulls at 1% of body weight). The criteria for slaughter was body condition score (2.0 - 3.0). The carcass characteristics and parts composition were influenced by the sex. The finishing system with supplementation promoted greater carcass yield and longer leg length. The tissue composition was different only for the sex, with the males...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Growth; Leg; Sheep; Shoulder; Tissue composition.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200029

Dynamics of forage accumulation in Elephant grass subjected to rotational grazing intensities
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Sousa,Braulio Maia de Lana; Nascimento Júnior,Domicio do; Monteiro,Hélida Christhine de Freitas; Silva,Sila Carneiro da; Vilela,Hélio Henrique; Silveira,Márcia Cristina Teixeira da; Rodrigues,Carlindo Santos; Sbrissia,André Fischer.
We assessed the accumulation dynamics of forage and its components in Elephant grass cv. Napier (Pennisetum purpureum Schum.) that were subjected to three post-grazing height treatments (30, 50, and 70 cm) from February through May 2009 (experiment one) and December 2009 through May 2010 (experiment two). In experiment one, the grazing events started when the light interception by the canopy reached 95%. The same was adopted for experiment two, except for the first grazing event, which was based on the height of the apical meristems of basal tillers. The experimental design for both experiments was a randomized complete block with three replications. The pastures that were managed at a post-grazing height of 30 cm exhibited lower rates of leaf and stem...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing management; Growth; Light interception; Pennisetum purpureum; Senescence; Tiller categories.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000900004

Residual feed intake in beef cattle
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Arthur,J P.F.; Herd,R.M.
Providing feed is a major input cost in beef production, hence improvements in the efficiency of feed utilisation will reduce the cost of production. Residual feed intake (RFI) is a measure of feed efficiency, and is defined as the difference between an animal's actual feed intake and its expected feed intake based on its size and growth. It is independent of the level of production, and the lower the value the more efficient the animal is. This paper examines the current state of knowledge on RFI. Available information indicates that postweaning RFI is moderately heritable, and that selection for low RFI will result in progeny that consume less feed for the same level of production as progeny of high RFI cattle. Under ad libitum feeding, RFI is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Feed efficiency; Growth; Residual feed intake.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008001300031

Chemical composition and photosynthetically active radiation of forage grasses under irrigation
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Silva,Edilane Aparecida da; Silva,Wilson Jesus da; Barreto,Antônio Carlos; Oliveira Junior,Antonio Barbosa de; Paes,José Mauro Valente; Ruas,José Reinaldo Mendes; Queiroz,Domingos Sávio.
The present study aimed to estimate the photosynthetically active radiation of tropical forage grasses in ten cutting dates, under irrigation. The following treatments were used: Brachiaria decumbens grass (Brachiaria decumbens cultivar Basilisk), Marandu grass (Brachiaria brizantha cultivar Marandu), Xaraes grass (Brachiaria brizantha, cultivar Xaraes), Mombaça grass (Panicum maximum cultivar Mombaça), Tanzania grass (Panicum maximum, cultivar Tanzania) and Tifton 85 grass (Cynodon spp cultivar Tifton 85). The weather parameters were collected by an automatic meteorological station installed in the location and used for irrigation management. The experiment was arranged in a split-plot completely randomized block design, considering the grasses as plots...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage production; Growth; Seasonality; Vegetation dynamics; Weather.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300015

Morphometrical development of tambaqui (Colossoma macropomum, Cuvier, 1818) under different photoperiods
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Mendonça,Pedro Pierro; Vidal Junior,Manuel Vazquez; Polese,Marcelo Fanttini; Santos,Monique Virães Barbosa dos; Rezende,Fabrício Pereira; Andrade,Dalcio Ricardo de.
The experiment was performed with 160 tambaqui (Colossoma macropomum) with average weight 11.01±2.08 g and total length 7.8±0.18 cm. Fishes were kept in sixteen aquariums with 56 L of water at 29.1±0.4 ºC of temperature, initial stocking density 1.97 g/L and constant aeration. The objective of this study was to assess the influence of photoperiod on fish performance. Treatments consisted of four photoperiods: T1 = 6 hours; T2 = 12 hours; T3 = 18 hours and T4 = 24 hours, with four replicates each. Fishes were fed twice a day with commercial extruded feed (28% of crude protein). The experiment was developed in closed circulation system, with volume of water renewal for each experimental unit equivalent to 40 times daily. Fish biometry was performed at the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioclimatology; Growth; Native fish.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600003

Growth hormone-insuline-like growth factor-I system in pejerrey Odontesthes bonariensis (Atheriniformes)
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Arranz,S.E.; Sciara,A. A.; Botta,P.; Cerutti,P.; Tobin,M.; Somoza,G.M.
Using biotechnology to increase the growth rates of fish is likely to reduce production costs per unit of food. Among vertebrates, fish appear to occupy a unique position, when growth patterns are considered. With few exceptions, fish species tend to grow indeterminately, implying that size is never fixed. Both hyperplasia and hypertrophy contribute to post-larval muscle growth in fish. Growth hormone (GH) - Insulin-like Growth Factor I (IGF-I) is the most important growth axis in fish. Our experimental model, the pejerrey, Odontesthes bonariensis (Ateriniformes) is a South American inland water fish considered to be a promising species for intensive aquaculture. However, one major drawback to achieve this goal is its slow growth in captivity. In order to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Growth hormone; Muscle hypertrophy; Oral administration; Recombinant protein.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008001300001

Available phosphorus in diets for 15 to 30 kg pigs genetically selected for meat deposition
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Arouca,Cláudio Luiz Corrêa; Silva,Francisco Carlos de Oliveira; Fontes,Dalton de Oliveira; Saraiva,Alysson; Donzele,Juarez Lopes; Silva,Martinho de Almeida e; Paula,Eriane de.
With the objective to evaluate the effect of dietary available phosphorus levels (aP) on the performance, blood and bone parameters of castrated male and female pigs, genetically selected for meat deposition, 60 commercial hybrids pigs with initial weight of 15.54±0.68 kg were allotted in a completely randomized block design, with six treatments (0.103, 0.210, 0.317, 0.424, 0.531, and 0.638% aP), five replicates, and two animals per experimental unit. Pigs were fed ad libitum and water was provided until the end of the experimental period (21 days), when animals reached 31.31±2.94 kg. Daily weight gain and daily feed intake increased, while the feed conversion improved quadratically up to 0.534, 0.487, and 0.574% aP maximum responses, respectively. The aP...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcass; Growth; Minerals; Nutrition; Performance.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100010

Growth performance and metabolic response of Nile tilapia fed rations supplemented with autolized yeast and zinc
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Signor,Altevir; Pezzato,Luiz Edivaldo; Padilha,Pedro de Magalhães; Padovani,Carlos Roberto; Barros,Margarida Maria.
This research evaluated the influence of yeast and zinc on growth performance and metabolic responses of Nile tilapia. Diets were formulated to contain 32.0% digestible protein and 3,240 kcal DE/kg diet and the following autolized yeast (%):zinc (mg/kg)relationships: 0.0:0.0; 0.0:79.5; 2.0:0.0; 0.795:79.5; 2.0:200; 4.0:400; 6.0:600; 12.0:1,200 and 14.0:1,400. It was used 135 fingerlings (7.27 ± 0.19 g), distributed in a complete random design in 27 50-L aquaria and they were fed ad libitum four times a day for 128 days. It was evaluated growth performance and metabolic responses, weight gain, apparent feed conversion; protein efficiency and survival rate; percentage of protein, ether extract, dry weight and ashes in the muscle and in the bones; ammonia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fingerlings; Growth; Metabolism; Metabolites; Minerals.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001200002

Productive performance, composition and carcass yield of lambs treated with zeranol
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Castillo,Javier G. Cantón; Romero,Alberto Alcaraz; Franco,Jorge Quintal.
Twenty weaned male hair lambs with average body live weight of 19.20 kg±2.18 kg (SD) were used to evaluate the effect of zeranol on growth, composition and carcass yield. The animals were distributed into a completely randomized design with two treatments: no anabolics (control); and treatment with zeranol, using a subcutaneous dose of 10 mg/50 kg body live weight. Lambs received a diet with 15 g/100 g of crude protein and 2.8 Mcal of metabolizable energy/kg dry matter for 84 days. At the end of experiment all animals were harvested and entire carcass and its parts (neck, shoulder, loin-rib, loin-skirt and leg) were weighed to determine the composition of muscle and bone. Control animals had higher dry matter intake (1.01 vs 0.88 kg/d), average daily gain...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcass composition; Growth; Sheep.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000600310

Forage accumulation in brachiaria grass under continuous grazing with single or variable height during the seasons of the year
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Santos,Manoel Eduardo Rozalino; Fonseca,Dilermando Miranda da; Gomes,Virgílio Mesquita.
The objective of this study was to evaluate grazing management strategies of Brachiaria decumbens cv. Basilisk managed with different heights under continuous grazing with cattle. Two grazing management strategies were evaluated: maintenance of pasture with an average height of 25 cm throughout the experimental period and maintenance of pasture on the average of 15 cm in height during winter, up to 25 cm from the beginning of spring. The split-plot scheme and the randomized block design with four replications were adopted. The grazing management strategies corresponded to the primary factor, while the seasons (winter, spring and summer) corresponded to secondary factor. The reduction of the average sward height to 15 cm in the winter resulted, when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria decumbens; Grazing management; Growth; Senescence.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000500002

Digestible lysine requirement of Nile tilapia fingerlings fed arginine-tolysine-balanced diets
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Furuya,Wilson Massamitu; Graciano,Themis Sakaguti; Vidal,Luiz Vítor Oliveira; Xavier,Tadeu Orlandi; Gongora,Leonardo Dantas; Righetti,José Sérgio; Furuya,Valéria Rossetto Barriviera.
This study was conducted to determine the digestible lysine requirements of Nile tilapia fingerlings. Fish (n = 300; average initial weight = 1.44 g) were distributed 15 300-L aquariums, in a completely randomized design with five treatments and three replicates, and fed extruded diets containing 11.3, 13.7, 16.1, 18.4 or 20.8 g/kg of digestible lysine. The arginine:lysine ratio was maintained at 1.3:1. All fish were fed diets containing 281 g/kg of digestible protein and 3,372 kcal digestible energy/kg, hand-fed until apparent satiation. There was no effect of the dietary lysine levels on survival rate, or protein and ash body rates. With increasing levels of lysine in the diet, a quadratic effect on weight gain, feed conversion, protein efficiency ratio,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Fish; Growth; Protein deposition.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300003

Evaluation of carcass traits, non-carcass components and 12th rib analysis of hair sheep supplemented with phosphorus
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Louvandini,Helder; McManus,Concepta; Dallago,Bruno Steffano; Machado,Bruno de Oliveira; Antunes,Dalton Araujo.
The aim of this study was to evaluate the performance of sheep supplemented with phosphorus (P) using carcass traits and analysis of 12th rib. Twenty male lambs weighing 13.88 ± 2.51 kg and grazing Andropogon gayanus pasture were divided in two treatments of 10 animals each. In group P, animals were supplemented with 3 g phosphorus/animal/day, while in group NP no P supplementation was given. After 82 days the animals were slaughtered and carcass measurements were taken. The 12th rib was also removed for analysis. No significant differences in body weight, carcass yield, or commercial cut weights were found between both treatments, except for liver and kidneys that were heavier in the supplemented group (p=0.0954). The 12th rib analysis showed that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lambs; Deficiency; Growth; Mineral; Santa Inês.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982006000200030

Effect of litter treatment on growth performance, intestinal development, and selected cecum microbiota in broiler chickens
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Taherparvar,Gilaneh; Seidavi,Alireza; Asadpour,Leila; Payan-Carreira,Rita; Laudadio,Vito; Tufarelli,Vincenzo.
ABSTRACT The objective of this study was to determine whether the type of bedding materials (sand, wood shavings, and paper) and of two chemical amendments (lime and bentonite) could interfere with litter quality (moisture, pH, and total bacterial counts), thereby influencing also the growth performance and the development of intestinal traits and cecum microbiota of chickens. Two hundred and seventy male Ross 308 broiler chickens were randomly assigned into nine treatment groups with three replicates per treatment. Broiler productive parameters, relative weight of different intestinal segments, content of cecal total bacterial counts (total aerobic bacteria, Lactobacilli, and coliforms), as well as litter moisture, pH, and total aerobic bacteria and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bedding material; Broilers; Growth; Litter quality; Microbiota.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000500257

Growth models fitted to Dipturus chilensis length-at-age-data support a two phase growth
Provedor de dados: Revista Chilena de Historia Natural
Autores: AVERSA,MARINA I; DANS,SILVANA L; GARCÍA,NÉSTOR A; CRESPO,ENRIQUE A.
Age and growth for the beaked skate was estimated from bands in the vertebral centra of 689 individuals obtained from incidental catches of the Argentine hake (Merluccius hubbsi) fishery. Age bias plots and indices of precision indicated that ageing method was precise and unbiased (% CV = 3 % PA = 82.09 %). Edge and marginal increment analysis of the vertebrae support the hypothesis of annual band pair deposition. Three growth models were fitted to length-at-age and the two-phase growth model produced the best fit. This feature has never been described before for D. chilensis and can be related to changes in energy allocation and the shift from juvenile to adult phase. The unrealistic biological estimates of the von Bertalanffy growth model illustrates the...
Tipo: Journal article
Palavras-chave: Beaked skate; Dipturus chilensis; Growth; Two-phase growth.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000100003

Relationships between leaf anatomy, morphology, and water use efficiency in Aloe vera (L) Burm f. as a function of water availability
Provedor de dados: Revista Chilena de Historia Natural
Autores: Silva,Herman; Sagardia,Susana; Ortiz,Mauricio; Franck,Nicolás; Opazo,Marcela; Quiroz,Madeleine; Baginsky,Cecilia; Tapia,Cristián.
The effects of water availability were evaluated on the photosynthetic tissue anatomy in Aloe vera(L) Burm f. and its relationship with morphological, physiological parameters, and water use efficiency as a function of aerial biomass and gel production. Plants were subjected to four levels of water availability equivalent to 20% (T1), 15% (T2), 10% (T3), and 5% (T4) of the atmospheric evaporative demand. The plants exhibited anatomical, morphological, and physiological responses to the different watering treatments. The extreme treatments produced negative responses due to excess water in T1 and water deficit in T4. Treatments T2 and T3 elicited positive responses in cell characteristics and productivity. Anatomical and structural characteristics were...
Tipo: Journal article
Palavras-chave: Anatomical adaptations; Biomass production; Growth; Stomata.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100012

Banks of microscopic forms and survival to darkness of propagules and microscopic stages of macroalgae
Provedor de dados: Revista Chilena de Historia Natural
Autores: SANTELICES,BERNABÉ; AEDO,DIEGO; HOFFMANN,ALICIA.
Previous studies have found that the number of species conforming a bank of microscopic forms in tide pools in central Chile accounted only for half the number of species present in the macroscopic vegetation around the pools. An elemental condition for survival in these banks is the ability of microscopic forms to tolerate darkness or very low irradiances for extended periods. To test this ability, spores of 17 green, brown and red algal species, present and absent from the bank, were incubated at different combinations of irradiances and day lengths. Propagules of 47 % of the species tested (eight species) germinated in total darkness while the propagules of the other nine species germinated under conditions of very low irradiance (2-10 µmol m-2 s-1). In...
Tipo: Journal article
Palavras-chave: Benthic algae; Dark tolerance; Germination; Growth; Microscopic forms.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000300006

Ecophysiological strategies in response to UV-B radiation stress in cultures of temperate microalgae isolated from the Pacific coast of South America
Provedor de dados: Revista Chilena de Historia Natural
Autores: MONTECINO,VIVIAN; MOLINA,XIMENA; MARTÏNEZ,GINGER; OLMEDO,M. ISABEL; RETAMAL,LEIRA; HANNACH,GABRIELA; ORELLANA,MÓNICA V.
Marine microalgae exposed to ultraviolet radiation (UV) have complex adaptive responses provided by a series of protection and repair mechanisms. Interspecific differences in UV sensibility could result in differential selection of the more tolerant species, having consequences for the structure of phytoplankton assemblages. The relative importance of protection and photorepair mechanisms of microalgal cells exposed to potential UV-B stress was studied in monocultures with different taxonomic, ecological and size characteristics obtained from the Chilean coast. Differences in photosynthesis and growth rates were predicted, since the ability to effectively acclimate to UV is not universal between microalgal species. The dinoflagellate Alexandrium catenella...
Tipo: Journal article
Palavras-chave: Photosynthesis; Absorbance; Photoreactivation; Growth; UV response.
Ano: 2001
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000200007

Morpho-physiological and productive biometry in semi-erect cultivars of the cowpea under different plant populations
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Bezerra,Antônio Aécio de Carvalho; Neves,Adão Cabral das; Rocha,Maurisrael de Moura; Brito,Lucélia de Cássia Rodrigues de.
ABSTRACT The aim of this study was to evaluate morpho-physiological and productive characteristics in four semi-erect cultivars of the cowpea under five plant populations. The experiment was conducted in the experimental area of Embrapa Meio-Norte in Teresina in the State of Piauí, Brazil (PI). The experimental design was of randomised complete blocks with four replications, in a 4 x 5 factorial scheme, for evaluating four cultivars (BRS Guariba, BRS Novaera, BRS Potengi and BRS Tumucumaque) and five plant populations (105, 2x105, 3x105, 4x105 and 5x105 plants ha-1). There were significant differences between cultivars for primary branch length (PBL), number of lateral branches (NLB), 100-grain weight (HGW), and dry-grain yield (GY). The maximum PBL of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Growth; Production; Plant density.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000400625

Growth, gas exchange and yield of peanut in frequency of irrigation
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Sousa,Geocleber Gomes de; Azevedo,Benito Moreira de; Fernandes,Carlos Newdmar Vieira; Viana,Thales Vinicius de Araújo; Silva,Maria Lilian Santos.
This study was conducted to evaluate the effect of different irrigation frequencies on growth, gas exchange and yield of the peanut (Arachis ypogea L). The experiment was conducted in the field using the experimental design of randomized blocks with five treatments, five replications with four plants per plot. The treatments were composed: F2 = (irrigation every 2 days), F4 = (irrigation every 4 days), F6 = (irrigation every 6 days), F8 = (irrigation every 2 days) and F10 = (irrigation every 10 days). At 60 days after sowing (DAS), the gas exchange variables (photosynthesis, stomatal conductance and transpiration) and growth variables (plant height, leaf number, stem diameter and shoot dry matter) were evaluated. The highest irrigation frequency tested...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arachis ypogea L.; Growth; Agricultural Irrigation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100004

Water allocations and mulching in castor bean crops in a semiarid Fluvic Neossol
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Silva,Júlio José do Nascimento; Montenegro,Abelardo Antônio Assunção; Pedrosa,Elvira Maria Régis; Beltrão,Napoleão Esberard de Macedo; Henrique,Hugo Manoel.
The influence of different irrigation levels, both with and without mulching, was evaluated for the growth variables of productivity, production components and water use efficiency, in a castor bean crop (Ricinus Comunnis) cv. BRS Energia, in a Fluvic Neossol of the semiarid in the Brazilian state of Pernambuco. The experimental design used was completely randomised in a factorial of 4 (irrigation levels) × 2 (with and without mulch), with four replications. The irrigation levels were based on the evapotranspiration of the crop (ETc), with L1 = 60% ETc, L2 = 80% ETc, L3 = 100% ETc and L4 = 120% ETc. All growth variables showed significant differences to the mulch at 120 days after germination. The number of racemes per plant, percentage of bark, and water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Irrigation; Growth; Production components.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000300003

ZINC IN THE NUTRITION AND YIELD OF GRASS-MEGATHYRSUS CULTIVATED IN OXISOL DYSTROPHIC
Provedor de dados: Revista Scientia Agraria Paranaensis
Autores: Vale, Diego wyllyam do; Prado, Renato de Mello; Santana, Jaiciclênia da Silva; Avalhães, Cíntia Carla; Fonseca, Ivana Machado.
The zinc (Zn) application of adequate form favors the growth of the plants, however, in high rates can diminish the yield of the pasture. Thus, it was objectified to evaluate the effect of the Zn application in the nutrition, growth and production of grass Panicum maximum cv. Megathyrsus, was realized  an experiment in conditions of house of vegetation with six rates of Zn: 0; 15; 30; 60; 120 and 360 mg dm-3, made use in fully randomized, with four repetitions. To the 45 and 75 days after the emergency of plants evaluated it height, the number of leaf, the number of tillers, the mass of dry substance of aerial part, the concentration of Zn in the soil, the content and accumulation of Zn in the plant. The zinc application increased its concentration in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Panicum maximum; Pasture; Grassy; Toxicity; Growth.
Ano: 2012
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/4739

Ultrasonography as a predicting tool for carcass traits of young bulls
Provedor de dados: Scientia Agricola
Autores: Suguisawa,Liliane; Mattos,Wilson Roberto Soares; Oliveira,Henrique Nunes de; Silveira,Antônio Carlos; Arrigoni,Mário de Beni; Haddad,Cláudio Maluf; Chardulo,Luis Artur Loyola; Martins,Cyntia Ludovico.
Considerable resources have been allocated to support research in the development of non-invasive and non-destructive techniques for carcass composition and quality evaluation. Ultrasonography is a reliable and relatively low-cost technique that can be used. In the present study, real-time ultrasonography was used to predict ribeye area (REA) and subcutaneous fat thickness (FT) in live animals as compared to carcass measurements. Animals used were 115 yearling bull calves (initial body weight, 329 kg), kept under feedlot conditions, of four genetic groups (30, ½ Angus x Nellore; 30, ½ Canchim x Nellore; 30, ½ Simmental x Nellore, and 25 Nellore), and two finishing frame sizes (small and large). Four ultrasonographic measurements were taken every 28 days...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Ribeye area; Fat thickness; Growth; Cross breeds.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400026

Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens
Provedor de dados: Scientia Agricola
Autores: Gomes,Marcelo Pedrosa; Marques,Teresa Cristina Lara Lanza de Sá e Melo; Nogueira,Mariana de Oliveira Gonçalves; Castro,Evaristo Mauro de; Soares,Ângela Maria.
The growth and developmental characteristics of grasses and their high biodiversity make such plants suitable for remediation of areas contaminated by heavy metals. Nevertheless, heavy metal toxic effect on the plants may cause alteration in their metabolic pathways, such as photosynthesis, respiration, and growth, modifying plant anatomy. This work aimed to evaluate the effect of levels of soil contamination (0, 7.5 % and 15 % m³ m-3) on biomass production, on photosynthetic characteristics and on anatomical changes in roots and leaves of brachiaria (Brachiaria decumbens Stapf.). After seeds were planted, seedlings were uprooted and replanted in vases containing soil at different contamination levels, being left to rest for 120 days. At the end of that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contaminated soil; Chlorophyll; Growth; Potencial photosynthesis.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500009

Risk of field cultivation of pickling cucumber caused by unfavorable sunshine duration conditions
Provedor de dados: Scientia Agricola
Autores: Kalbarczyk,Robert.
Solar energy, accessible to plants during sunshine from the sunrise to the sunset is of key importance in productivity of agrocenoses. The aim of the work was to determine risk of pickling cucumber cultivation caused by an unfavorable course of sunshine duration in Poland on the basis of a 40-year research period 1966-2005. The research into the subject was undertaken due to frequent occurrence of sunshine deficiency in Poland and its high temporal and spatial variability. Effect of solar conditions described by sunshine duration in the five development stages on the quantity of the total and marketable yield of cucumber with consideration of a linear trend of an independent variable was determined by means of multiple regression analysis. The accuracy of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Development; Growth; Reduction in yield; Solar conditions.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300009

Macronutrient accumulation and partioning in fertigated sweet pepper plants
Provedor de dados: Scientia Agricola
Autores: Marcussi,Francisco Fernando Noronha; Villas Bôas,Roberto Lyra; Godoy,Leandro José Grava de; Goto,Rumy.
Information on nutrient demand during each growth stage is essential for efficient application of nutrients. A pot experiment was carried out with a Typic Hapludox under greenhouse conditions in Botucatu, SP, Brazil, aiming was to determine nutrient uptake and partition of sweet pepper plants, cultivar Elisa in randomized block design with four replications. The fertigation was simulated through 2-L PET bottles (neck down with a tube and a flow regulator at the end, simulating a drip irrigation system). Four plants per replication were collected at eight growth stages (0, 20, 40, 60, 80, 100, 120 and 140 days after the seedling transplant - DAT). The period of largest extraction of nutrients for the plant occurred from 120 to 140 DAT, which coincides with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum L.; Irrigation; Greenhouse; Growth.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100011

Field performance of "marsh seedless" grapefruit on trifoliate orange inoculated with viroids in Brazil
Provedor de dados: Scientia Agricola
Autores: Stuchi,Eduardo Sanches; Silva,Simone Rodrigues da; Donadio,Luiz Carlos; Sempionato,Otávio Ricardo; Reiff,Eduardo Toller.
Some viroids reduce citrus tree growth and may be used for tree size control aiming the establishment of orchards with close tree spacing that may provide higher productivity than conventional ones. To study the effects of citrus viroids inoculation on vegetative growth, yield and fruit quality of 'Marsh Seedless' grapefruit (Citrus paradisi Macf.) grafted on trifoliate orange [Poncirus trifoliata (L.) Raf.], an experiment was set up in January 1991, in Bebedouro, São Paulo State, Brazil. The experimental design was randomized blocks with four treatments with two plants per plot: viroid isolates Citrus Exocortis Viroid (CEVd) + Hop stunt viroid (HSVd - CVd-II, a non cachexia variant) + Citrus III viroid (CVd-III) and Hop stunt viroid (HSVd - CVd-II, a non...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Yield; Fruit quality; Exocortis; Dwarfing.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000600004

Optimization of banana plantlets acclimatization by hydroponic cultivation
Provedor de dados: Scientia Agricola
Autores: Toyosumi,Iumi da Silva; Silva,Tibério Santos Martins da; Melo,Diego Magalhães; Azevedo Neto,André Dias de; Soares,Tales Miler; Coelho Filho,Maurício Antonio.
ABSTRACT: Acclimatization is the final phase of banana plantlet production by micropropagation. In this phase, the plantlets are grown in a protected environment with high demand for water, fertilizer and labor, until reaching the standard size and quality required for marketing. The aim of this study was to evaluate the possibility of reducing these costs and the duration of the acclimatization phase, using the hydroponic cultivation technique as compared to the conventional system. ‘Prata–Anã’ banana plantlet performance was measured for both systems under both tropical summer and winter conditions, based upon water and nutrient use efficiency and growing time of the plantlets. In both seasons, the plantlets produced hydroponically presented faster...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Musa spp.; Soil-less cultivation; Water use efficiency; Growth.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000700101

Winery distillery waste compost effect on the performance of melon crop under field conditions
Provedor de dados: Scientia Agricola
Autores: Villena,Raquel; Castellanos,María Teresa; Cartagena,María Carmen; Ribas,Francisco; Arce,Augusto; Cabello,María Jesús; Requejo,María Isabel.
ABSTRACT: The substantial generation of organic waste together with increasing interest in developing sustainable agriculture heralds an opportunity for mobilizing the recycling of these materials as a source of organic matter and nutrients into a viable management strategy option. A field experiment was conducted to evaluate the use of compost derived from waste produced by the winery and distillery industries in a drip-irrigated melon crop traditionally grown in the area where these wastes are generated. A randomized complete block design was used with four treatments consisting of three different dose levels of compost: 7 (D1), 13 (D2) and 20 (D3) t ha−1 and a control (D0) without the application of compost. The effects of these treatments on plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis melo; Growth; Yield; Nitrogen; Phosphorus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000600494

Decoquinate, lasalocid and monensin for starter feeds and the performance of holstein calves to 20 weeks of age
Provedor de dados: Scientia Agricola
Autores: Nussio,Carla Maris Bittar; Huber,John Tal; Nussio,Luiz Gustavo.
The large utilization of coccidiostats in dairy herds has raised the question regards the best product to use, based on better animal performance. Sixty-four Holstein calves were randomly assigned to four treatments at 10 (±4) d of age to evaluate calf performance when fed approved coccidiostats available on the market in Arizona, USA. Calves received a dry calf starter without (control) or with one of the following coccidiostats: lasalocid, 30 mg kg-1; decoquinate, 19 mg kg-1; and monensin, 30 mg kg-1. Calves received 3.6 kg d-1 of a commercial 22% CP:20% fat milk replacer until 6 wk of age. Calves were offered starter "ad libitum" up to 2 kg d-1, and calves had free access to water throughout the trial. Alfalfa hay was offered "ad libitum" after weaning....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coccidiostats; Feed efficiency; Growth; Ionophore; Weight gain.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300002

Estimation of jundiá (Rhamdia quelen) dietary amino acid requirements based on muscle amino acid composition
Provedor de dados: Scientia Agricola
Autores: Meyer,Gustavo; Fracalossi,Débora Machado.
Jundiá, Rhamdia quelen (Quoy &amp;amp; Gaimard, 1824), is a catfish native to Central and South America. The species has a number of excellent farming features, such as easy handling, low temperature resistance, efficient feed conversion, flavorsome meat and absence of intramuscular bones, and has been increasingly raised in Southern Brazil. However, most of its nutritional requirements have not yet been determined, including the essential amino acid (EAA) requirements. The objective of the present study was to estimate such requirements through the determination of muscle tissue amino acid composition for four groups of jundiá. Two groups were wild caught and allocated in two categories: from 1 to 100 g and from 101 to 200 g. The other two groups,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrition; Catfish; Siluriformes; Growth; Weigth gain.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000400015

Chemical and physical fertility indicators of a weakly-structured Ultisol after liming and mulching
Provedor de dados: Scientia Agricola
Autores: Moura,Emanoel Gomes de; Coelho,Kátia Pereira; Freitas,Idelfonso Colares de; Aguiar,Alana das Chagas Ferreira.
In the humid tropic, chemical and physical soil properties that decrease soil's nutrient availability and increase oxygen deficiency are important as restrictions to crop growth. The objective of this study was to evaluate the relations between plant growth and chemical and physical fertility indicators of an Ultisol developed from sediments of the Itapecuru Formation in Central-Northern state of Maranhão, Brazil. An experiment was established with randomized block design, four replicates, and six treatments: 6.0 Mg ha-1 mulch with or without liming; 3.0 Mg ha-1 mulch with or without liming; bare soil with or without liming. Determinations in the plants included leaf area index, net assimilation rate, and the yield parameters: mean number and weight of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Growth; Yield; Effective porosity.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600012

Salicylic acid ameliorates the adverse effect of salt stress on strawberry
Provedor de dados: Scientia Agricola
Autores: Karlidag,Huseyin; Yildirim,Ertan; Turan,Metin.
Strawberry is considered as a salinity sensitive species and is adversely affected in response to the salt stress in terms of growth and yield. Pot experiments were conducted to determine the effect of exogenous salicylic acid (SA) application on physiology, growth, chlorophyll and mineral content of strawberry grown under salt stress and greenhouse conditions. Strawberry plants were treated with SA at different concentrations (0.0, 0.25, 0.50 and 1.00 mM). Salinity treatments were established by adding 0 and 35 mM of NaCl to a base complete nutrient solution. Salt stress negatively affected the growth, chlorophyll content and mineral uptake of strawberry plants. However, plants treated with SA often had greater shoot fresh weight, shoot dry weight, root...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Growth; Mineral content.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200006

Variants in GH, IGF1, and LEP genes associated with body traits in Santa Inês sheep
Provedor de dados: Scientia Agricola
Autores: Machado,Alessandro Lima; Meira,Ariana Nascimento; Jucá,Adriana de Farias; Azevedo,Hymerson Costa; Muniz,Evandro Neves; Coutinho,Luiz Lehmann; Mourão,Gerson Barreto; Pedrosa,Victor Breno; Pinto,Luís Fernando Batista.
ABSTRACT: Growth hormone (GH), insulin-like growth factor 1 (IGF1), and leptin (LEP) can be candidate genes for association studies because they play vital roles in the metabolism process. Thus, this study aimed to identify variants in these genes associated with body traits in Santa Inês sheep. The following were recorded: body weight at 100 (BW100) and 240 days (BW240), average daily gain (ADG), withers (WH) and croup (CH) heights, body length (BL), thoracic (TG) and leg (LG) girths, thoracic (TW) and croup (CW) widths, body depth (BD), rib eye area (REA), fat thickness (FT), and carcass finishing score (CFS). Single-locus association analysis was performed with 11 variants in IGF1, 18 in LEP, and 16 in GH. Moreover, two haplotypes in IGF1 and one...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hormone; Carcass; Growth; Haplotype; Ovine.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000300401

Effect of endomycorrhiza on growth and nutrient absorption ability of corn
Provedor de dados: Thai Agricultural Research Repository
Autores: Omsub Nopamornbodi.
6 tables
Palavras-chave: Corn; Maize; Endomycorrhiza; Growth; Nutrient absorption; ข้าวโพด; เอนโดไมคอร์ไรซา; การเจริญเติบโต; การดูดซึมธาตุอาหาร.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3983

Research on corn production aspects during 1983
Provedor de dados: Thai Agricultural Research Repository
Autores: Supot Faungfupong; Pipat Weerathaworn; Somchai Piyapantavanon; Sudarath Sakunkhu; Porn Rungchang.
9 tables
Palavras-chave: Corn; Maize; Hybrids; Variety trials; Planting systems; Planting methods; Tillage systems; Zero tillage; Growth; Yields; Agronomic characters; ข้าวโพด; พันธุ์ลูกผสม; การทดสอบพันธุ์; ระบบการปลูกพืช; การปลูกโดยไม่ไถพรวน.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4137

การเจริญเติบโตและผลผลิตของสตรอเบอรี่ในสภาพพื้นที่ปลูกที่มีความสูงต่างๆ กัน
Provedor de dados: Thai Agricultural Research Repository
Autores: Prapatsorn Riyaphan.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Strawberry; Fragaria ananassa; Tioga variety; Tochiotome variety; Cropping systems; Cultivars; Elevation; Daughter plant; Length runner; Growth; Yield; Chiangmai province; สตรอเบอรี่; พันธุ์ไทโอกา; พันธุ์โทชิโอโตเมะ; การปลูกพืช; สภาพพื้นที่ปลูก; ระดับความสูง; การเจริญเติบโต; ต้นไหล; ความยาวเส้นไหล; คุณภาพผลผลิต; จ.เชียงใหม่.
Ano: 2005
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5506

Effects of compost on corn charcoal stalk rot disease and its causal organism, Macrophomina phaseolina
Provedor de dados: Thai Agricultural Research Repository
Autores: Vanlada Sunanthapongsuk; Pitayakon Limtong; Siangjeaw Piriyaprin; Prachaya Thunyadee; Prachum Jutawantana; Udom Pupipat.
7 ill.
Palavras-chave: Corn; Maize; Diseases; Charcoal stalk rot; Fungi; Composts; Macrophomina phaseolina; Growth; Yields; ข้าวโพด; ปุ๋ยหมัก; โรคลำต้นเน่า; คุณสมบัติทางเคมีและกายภาพของดิน; การเจริญเติบโต; ผลผลิต.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4260

Physiological studies in corn and sorghum
Provedor de dados: Thai Agricultural Research Repository
Autores: Pismai Srisukphrasert; Atcharee Rakla; Prakob Jan-aram; Teerasak Manupeerapan; Prasop Depyasuvarn.
5 ill., 8 tables
Palavras-chave: Corn; Maize; Sorghum; Harvesting date; Seed yield; Spacing; Weeding methods; Weed control; Detasseling; Ear; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; สรีรวิทยา; การเก็บเกี่ยว; ระยะระหว่างแถว; การกำจัดวัชพืช; ข้าวโพดฝักอ่อน.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4139

Response to plant spacing of KU hybrid 2301 corn grown at different soil fertility levels
Provedor de dados: Thai Agricultural Research Repository
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sukum Chotechuangmanirat.
1 ill., 2 tables
Palavras-chave: Corn; Maize; Hybrids; Plant spacing; Soil fertility; Growth; Yields; ข้าวโพด; ลูกผสม; ระยะปลูก; ระดับปุ๋ย.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4595

บทบาทของเชื้อแบคทีเรียในทางเดินอาหารของแมลงวันผลไม้ (Diptera: Tephritidae)
Provedor de dados: Thai Agricultural Research Repository
Autores: Narit Thaochan.
Tipo: PhysicalObject
Palavras-chave: Fruit flies; Diptera; Tephritidae; Bactrocera dorsalis; Enterobacteriaceae; Symbiosis; Parasitism; Gut bacteria; Biodiversity; Behaviour; Growth; แมลงวันผลไม้; เชื้อแบคทีเรีย; ภาวะแบบพึ่งพาอาศัยกัน; ภาวะที่เป็นโทษต่อกัน; ทางเดินอาหาร; ความหลากหลายทางชนิด; กระบวนการเจริญเติบโต; การแสดงพฤติกรรม; การควบคุมประชากร; การควบคุมแมลงวันผลไม้.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5765

Sorghum breeding
Provedor de dados: Thai Agricultural Research Repository
Autores: Krisda Samphantharak; Suranee Koonphol.
4 tables
Palavras-chave: Sorghum; Plant breeding; Selection; Variety trials; Growth; Yields; Pest resistance; Disease resistance; Genetic improvement; Hybrid program; Hybridization; Yield trials; ข้าวฟ่าง; อายุเก็บเกี่ยวสั้น; การต้านทานต่อศัตรูพืช; การปรับปรุงประชากร; โครงการพัฒนาลูกผสม; วิธีการคัดเลือก; การทดสอบผลผลิต.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3819

Studies on mycorrhiza in corn
Provedor de dados: Thai Agricultural Research Repository
Autores: Poonpilai Suwanarit; Yanee Tretanuchai; Charan Chettanachitara; Amara Chantanao.
4 tables
Palavras-chave: Corn; Maize; Mycorrhiza; Roots; Root culture; Growth; ข้าวโพด; ไมคอร์ไรซา; การเพาะเลี้ยงเนื้อเยื่อราก.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4069

การศึกษาเปรียบเทียบความสามารถในการปรับตัวของลินินพันธุ์ต่าง ๆ ที่ระดับความสูงของพื้นที่ 3 ระดับ ในจังหวัดเชียงใหม่
Provedor de dados: Thai Agricultural Research Repository
Autores: Parinya Vilairatana.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Linseed; Linum usitatissimum; Adaptability; Varieties; Growth; Harvesting time; Yield; Elevations; Royal Agricultural Station Angkhang; Royal Agricultural Station Pangda; Maejo Institute of Agricultural Technology; Chiang Mai province; ลินิน; พันธุ์; ความสามารถในการปรับตัว; การเจริญเติบโต; ระยะเก็บเกี่ยว; ผลผลิต; ระดับความสูง; สถานีเกษตรหลวงอ่างขาง; สถานีเกษตรหลวงปางดะ; สถาบันเทคโนโลยีการเกษตรแม่โจ้; จ.เชียงใหม่.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5513

Mycotoxin in mold corn, detoxification and utilization of mold corn in chick rations
Provedor de dados: Thai Agricultural Research Repository
Autores: Prateap Rachapaetayakom; Ankana Hanbranchong; Suporn Sukhupanyaraxa.
4 tables
Palavras-chave: Corn; Maize; Chickens; Mycotoxin; Mold corn; Detoxification; Rations; Ingredients; Feeds; Growth; ข้าวโพด; สารพิษจากเชื้อรา; การทำลายสารพิษ; สูตรอาหาร; ลูกไก่.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3943

ผลของสารสกัดหยาบจากข่าต่อการงอกและการเจริญเติบโต ของพืชปลูกและวัชพืชบางชนิด
Provedor de dados: Thai Agricultural Research Repository
Autores: Supatra Khamriang; Wantana Sinsiri; Naris Sinsiri; Waranyu Kaewduangta.
In this study, crude extract of Alpinia galangal (Linn.) Swartz was separated into 2 fractions by column chromatography. The seeds of 6 species of crops and weeds (Oryza sativa, Zea mays L., Arachis hypogaea, Brassica iboglabra, Praxellis clematidea and Echinachola colonum) were placed in media containing either fraction A or B at various concentrations of 1%, 3% and 5%. The percentages of germination and growth of each species were measured. Fraction A at 5% resulted in the highest inhibition of germination for Oryza sativa, Zea mays L., Arachis hypogaea and Brassica iboglabra. In contrast, the germination of Praxellis clematidea and Echinachola colonum was most inhibited on media containing fraction B at 5%. The growth of the leaf width and stem length...
Tipo: Collection
Palavras-chave: Alpinia galangal (Linn.) Swartz; Crude extract; Growth; Plant pest; Weed; Brassica iboglabra; Praxellis clematidea; Oryza sativa; Zea mays L; Arachis hypogaea; Praxellis clematidea; Echinachola colonum; Weed control; ข่า; สารสกัดหยาบ; การเจริญเติบโต; วัชพืช; การกำจัดวัชพืช; การควบคุม; หญ้าสาบนก; หญ้าสาบม่วง; ข้าว; ข้าวโพด; ถั่วลิสง; คะน้า; การยับยั้งการงอก.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5838

ผลของปุ๋ยเคมีและปุ๋ยมูลไก่ ต่อการเจริญเติบโตและผลผลิตของข้าวโพดหวานที่ปลูกอย่างต่อเนื่องในดินชุดโคราช จังหวัดขอนแก่น
Provedor de dados: Thai Agricultural Research Repository
9 tables
Palavras-chave: Corn; Maize; Sweet corn; Chemical fertilizers; Chicken manure; Growth; Yields; Korat soil; ข้าวโพดหวาน; ปุ๋ยเคมี; ปุ๋ยมูลไก่; การเจริญเติบโต; ผลผลิต; ดินชุดโคราช.
Ano: 1984
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4476

Nutrition tests with corn and sorghum
Provedor de dados: Thai Agricultural Research Repository
14 tables
Palavras-chave: Broiler chickens; Layer chickens; Swine; Corn; Maize; Sorghum; Rations; Ingredients; Nutrition tests; Nutrition value; Protein quality; Opaque-2; Growth; Feed conversion efficiency; ข้าวโพด; ข้าวฟ่าง; คุณค่าทางอาหาร; การวิเคราะห์.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3807

Comparative studies among some soil management practices on growth and yield of corn
Provedor de dados: Thai Agricultural Research Repository
Autores: Prasop Virakornphanich; Samnao Phetchawee.
Palavras-chave: Corn; Maize; Soil management; Fertilizers; Growth; Yields; ข้าวโพด; การจัดการดิน; อัตราการเจริญเติบโต; การเพาะปลูก.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4060

อิทธิพลของสารพาโคลบิวทราโซลที่มีต่อการเจริญเติบโต การเกิดดอกและผลผลิตของบ๊วย
Provedor de dados: Thai Agricultural Research Repository
Autores: Jaturaporn Rakngan.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Prunus mume; Japanese apricot; Paclobutrazol; Flowering; Fruiting; Growth; Branching; Yield; บ๊วย; สารพาโคลบิวทราโซล; การเกิดดอก; การออกผล; การเจริญเติบโต; การแตกกิ่ง; ผลผลิตบ๊วย.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5486

Response of nitrogen and phosphorus on the growth of corn at Farm Suwan
Provedor de dados: Thai Agricultural Research Repository
Autores: Dad, Chaudhry Allah.
1 table
Palavras-chave: Corn; Maize; Phosphorus fertilizers; Nitrogen fertilizers; Growth; Yields; Farm Suwan; ข้าวโพด; ปุ๋ยฟอสฟอรัส; ปุ๋ยไนโตรเจน.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3780

การงอกและการเจริญเติบโตของเอมบริโอพืชในสกุล Prunus ที่ยังพัฒนาไม่เต็มที่โดยวิธีการเพาะเลี้ยงเอมบริโอ
Provedor de dados: Thai Agricultural Research Repository
Autores: Nonglak Jeengool.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Peach; Prunus persica; Nectarine; Plum; Prunus domestica; Plant; Genus Prunus; Embryo; Germination; Growth; Embryo culture technique; Culture media; Woody plant medium; WPM; Brooks and Hough; BH; พีช; เนคทารีน; พลัม; พืช; เอมบริโอ; การงอก; การเจริญเติบโต; การเพาะเลี้ยงเอมบริโอ; อาหารเพาะเลี้ยง; สูตรอาหาร.
Ano: 2003
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5477

International training programs
Provedor de dados: Thai Agricultural Research Repository
Autores: Smeltzer, Dale G.
13 tables
Palavras-chave: Corn; Maize; Training programs; Variety trials; Fertilizer trials; Population density trials; Mixed cropping; Crop management; Soil management; Pest control; Plant breeding; Growth; Yields; ข้าวโพด; โครงการฝึกอบรม.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3847

การคัดเลือก Ecorace ไหมอีรี่เพื่อการปรับปรุงพันธุ์
Provedor de dados: Thai Agricultural Research Repository
Autores: Duenpen Wongsorn; Siviali Sirimungkararat; Weerasak Saksirirat.
The selection of eri silkworm ecorace with high yield and distinct in morphological character is necessary for variety improvement. Five eri silkworm ecoraces, SaKKU1, SaKKU2, SaKKU3, SaKKU4 and SaKKU5 were surveyed and derived in country or from academic cooperation in international level. All ecoraces were cultured using castor leaves of TCO101 variety as food plant at 25±2 °C, 80±5%R.H. Based on morphological characters, there were similar except body of the 5th instar larva of SaKKU1 was covered with white powder and ripe larva showing shiny dominant yellow color. Life cycles were also similar durations, 46-53 days (SaKKU1), 42-53 days (SaKKU2), 42-52 days (SaKKU3), 40-56 days (SaKKU4) and 41-52 days (SaKKU5). SaKKU1 had highest survival rate at larval...
Tipo: PhysicalObject
Palavras-chave: Ecorace eri; Samiaricini; Silkworm; Variety improvement; Screening; Morphological; Growth; Yields; ไหมอีรี่; แมลง; การปรับปรุงพันธุ์; การคัดเลือก; ลักษณะทางสัณฐานวิทยา; การเจริญเติบโต; ความแข็งแรง; ผลผลิต; การอยู่รอด.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5771

Sorghum in irrigated cropping systems in the north
Provedor de dados: Thai Agricultural Research Repository
Autores: Paisan Laohajirapan; Kanok Rerkasem; Somchai Ongprasert.
6 ill., 1 table
Palavras-chave: Sorghum; Cropping systems; Irrigation; Water use; Growth; Soil moisture content; Yields; ข้าวฟ่าง; ระบบการปลูกพืช; การให้น้ำชลประทาน; ประสิทธิภาพการใช้น้ำ; การเจริญเติบโต.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4068

Stimulating effects of foliar K-Fertilizer applied at appropriate stage of development of corn: Second field confirmation
Provedor de dados: Thai Agricultural Research Repository
Autores: Amnat Suwanarit; Sodsai Changsaluk.
2 tables
Palavras-chave: Corn; Maize; Foliar K-fertilizer application; Growth; Development; ข้าวโพด; การให้ปุ๋ยทางใบ; ปุ๋ยไนโตรเจน; ระยะการเจริญเติบโต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4352

Soil studies
Provedor de dados: Thai Agricultural Research Repository
4 ill., 14 tables
Palavras-chave: Corn; Maize; Sorghum; Varieties; Nitrogen fertilizers; Phosphate fertilizers; Soil physics; Soil moisture regime; Soil chemicophysical properties; Soil mineralogy; Soil types; Soil surveys; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; ความอุดมสมบูรณ์ของดิน; ลักษณะทางกายภาพ; การสำรวจดิน; ชุดดิน.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3762

Effects of some soil managements on soil moisture retention and on the growth of corn and mungbeans
Provedor de dados: Thai Agricultural Research Repository
Autores: Kubota, Toru; Prateep Verapattananirund; Thirapong Piyasiranond; Pongpit Piyapongse.
Palavras-chave: Corn; Maize; Mungbeans; Mulching; Tillage; Soil moisture content; Soil management; Growth; Yields; ข้าวโพด; ถั่วเขียว; ความชื้นในดิน; การจัดการดิน.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3929

อิทธิพลของสารพาโคลบิวทราโซลที่มีต่อการเจริญเติบโต การออกดอก การติดผล ผลผลิต และคุณภาพของผลแอปเปิลพันธุ์ Anna และ Ein Shemer
Provedor de dados: Thai Agricultural Research Repository
Autores: Phichit Sripinta.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Apple; Malus domestica; Anna; Ein Shemer; Paclobutrozol; Growth; Flowering; Fruit setting; Yield; Fruit quality; Royal Ang Khang Station; Chiang Mai province; แอปเปิล; พันธุ์; สารพาโคลบิวทราโซล; สารชะลอการเจิรญเติบโต; การเจริญเติบโต; การออกดอก; การติดผล; ผลผลิต; คุณภาพผล; สถานีเกษตรหลวงอ่างขาง; จ.เชียงใหม่.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5512

Agronomy
Provedor de dados: Thai Agricultural Research Repository
9 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizers; Varieties; Growth; Yields; Chainat paddy field; ข้าวโพด; ข้าวฟ่าง; การเพาะปลูก; การเขตกรรม.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3796

Fertilizer trial on corn and sorghum
Provedor de dados: Thai Agricultural Research Repository
Autores: Ring Meesawat; Dumri Thawornmas; Tianchai Suvanvej; Pradit Boonampol; Mongkol Panichkul.
7 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizer trials; Nitrogen fertilizers; Rock phosphate; Livestock manures; Soil chemicophysical properties; Nitrogen uptake; Soil types; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบปุ๋ย.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3926

Regional testing
Provedor de dados: Thai Agricultural Research Repository
1 ill., 23 tables
Palavras-chave: Corn; Maize; Sorghum; Variety testing; Regional testing; Varieties; Variety trials; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; การทดสอบพันธุ์ในหลายท้องที่.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3797

การพัฒนาสายพันธุ์เรณูเป็นหมันโดยวิธีการผสมกลับ
Provedor de dados: Thai Agricultural Research Repository
Autores: Bang-on Thammasamisorn.
Development of new CMS lines by backcrossing was conducted at Suphan Buri Rice Research Center during 2005-2011. The objective was to develop Thai elite breeding lines to be better varieties of CMS lines adapted to the environment in Thailand. The new CMS lines will be used for research project on hybrid rice production. CMS lines from IRRI were used as donor in repeated backcrossing of 6-7 generations to the recurrent parent, Thai elite breeding line. After seven generations of repeated backcrossing two new CMS lines, SPR06186A (IR58025A/7*SPR98015-59-1-2-2-2) and SPR06189A (IR73328A/7*SPR98015-59-1-2-2-2), were developed. These two lines have one hundred percent of pollen sterility and similar agronomic traits to the recurrent parent. SPR06186A has a...
Tipo: PhysicalObject
Palavras-chave: Cytoplasmic male sterile; CMS line; Hybrid rice; Backcross; Genetic stability; Varieties; Plant breeding; Growth; Seeds quality; Seed set; Pollen sterility; สายพันธุ์เรณูเป็นหมัน; การผสมกลับ; ข้าวลูกผสม; การผสมพันธุ์ข้าว; การปรับปรุงพันธุ์; ลักษณะประจำพันธุ์; การทดสอบพันธุ์; ระยะเวลาออกดอก; เปอร์เซ็นต์การติดเมล็ด; คุณภาพเมล็ดพันธุ์.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5703

ผลของจิบเบอเรลลินที่มีต่อการผลิตไหลและการเจริญเติบโตของสตรอเบอรี่พันธุ์ Tioga
Provedor de dados: Thai Agricultural Research Repository
Autores: Nopawan Thongrod.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Fragaria ananassa; Strawberry; Tioga; Gibberellin; Growth; Runner production; GA; สตรอเบอรี่; พันธุ์ไทโอกา; จิบเบอเรลลิน; การเจริญเติบโต; การผลิตไหล; ส่วนขยายพันธุ์.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5505

ผลผลิตและสารสำคัญของปัญจขันธ์ 3 พันธุ์ ที่ปลูกในพื้นที่สูงจังหวัดเลย
Provedor de dados: Thai Agricultural Research Repository
Autores: Witchaya Srisook.
The study was to examine yield and active constituent on three varieties of Gynostemma pentaphyllum; such as Angkhang, Sibsong punna and Local variety for selecting a good variety which were grow at amphur Phurua Loei province with attitude approximately 900 matre from sea level. The transfered seedling from cutting one month old and 50% light shading. G. pentaphyllum was harvested at the age of 4 months (Apr - Jul 2011), dried with hot air oven at 60-65 ºc for 6 hours and determine total saponin content. It was found that fresh weight and dry weight were significant difference (p &lt; 0.01) between the varieties. Fresh weight of Angkhang, Sibsong punna and Local variety were 387.9, 272.9 and 126.1 kg./rai, respectively, and dry weight were 45.8, 40.4 and...
Tipo: PhysicalObject
Palavras-chave: Gynostemma pentaphyllum; Cucurbitaceae; Angkhang variety; Sibsong punna variety; Local variety; Variety selection; Growth; Total saponin; Flavour; Loei province; ปัญจขันธ์; ชาสตูล; เบญจขันธ์; เจียวกู่หลาน; เซียนเฉ่า; อมาชาซูรู; พันธุ์อ่างขาง; พันธุ์สิบสองปันนา; พันธุ์พื้นเมือง; การคัดเลือก; การเจริญเติบโต; ปริมาณซาโปนิน; คุณภาพผลผลิต; รสชาติ; จ.เลย.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5778

ข้าวนาน้ำฝนสายพันธุ์ดีเด่น PSL97060-17-CNT-1-2-1
Provedor de dados: Thai Agricultural Research Repository
Autores: Anakkapon Boonchuay; Somphong Choeyphan; Apichat Noenplab; Jaturong Pipatpiriyanon; Pongsa Sukserm; Acharaporn Na Lampang Noenplab; Nalinee Chiengwattana; Supattra Suwanthada; Chutiwat Wannasai; Sa-ang Chairinte; Duang-orn Ariyapruek; Kawaporn Puumchoey; Sumaree Sangprem; Jet Kotcharoek; Pamorn Pattawatang; Duangkamon Boonchuay; Chairat Channoo; Duangporn Withoonjit; Phremkamon Munninta; Wiphawadee Chamnan; Nayakorn Sa-nguankaew; Wantana Sriratanasak.
In wet season, the rainfed area in the Lower North of Thailand region has abundance soil and water. It’s suitable for grow the rice variety which high yield potential. However, the favorite rice varieties have often had low yield and highly susceptible to rice pests. The rice breeding for high yield and resistance to rice insect pests and rice diseases but has maintained favorite good qualities for eating. It’s the importance alternative of farmer for change variety to good qualities, increase yield and adequate to consumption. The promising lines designated PSL97060-17-CNT-1-2-1 was obtained the three way cross between KLG88028-22-1-2-2 and F1 of SPR88096-17-3-2-2 and IR60 at Phitsanulok Rice Research Center. After that Chai Nat Rice Research Center has...
Tipo: PhysicalObject
Palavras-chave: Rice; Rice production; Non-glutinous rice; Photoperiod sensitive; Early maturity; Varieties; Plant breeding; Growth; Yields; Seeds quality; Cooking quality; Rainfed; Lower north; ข้าวเจ้า; การผลิตข้าว; นาน้ำฝน; ข้าวไวต่อช่วงแสง; ข้าวอายุเบา; พันธุ์; การปรับปรุงพันธุ์พืช; การเติบโต; ผลผลิต; คุณภาพเมล็ดพันธุ์; คุณภาพหุงต้ม; ภาคเหนือตอนล่าง.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5701

การศึกษาเปรียบเทียบผลของเชื้อรา วีเอ ไมคอไรซา 4 ชนิด ต่อการเจริญของข้าวโพด
Provedor de dados: Thai Agricultural Research Repository
Palavras-chave: Corn; Maize; Growth; Va mycorrhiza; ข้าวโพด; การเจริญเติบโต; วีเอไมคอร์ไรซา.
Ano: 1984
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4490

วิกฤติโลกร้อนกับการวิจัยและพัฒนาพันธุ์ข้าวสาลี
Provedor de dados: Thai Agricultural Research Repository
Autores: Nongnuch Pradit.
Crisis of Global Warming resulting in climate change seriously and have an impact on the production of cereals, especially wheat, a crop that requires low temperatures for growth. The growth arrest and lower productivity. Meteorological data of Thailand to global warming as well. The temperature rise and the overall decrease in rainfall. Effects of climate change has extended to include wheat varieties research and development in Rice research in the Upper North and the Northeast in Thailand, the region has the potential to grow wheat and research and development of such a long time. We found that wheat has been the impact of climate change with temperature higher than the optimum temperature for growth. It halts wheat growth, acceleration of growth and...
Tipo: PhysicalObject
Palavras-chave: Wheat; Global warming; Climate change; Growth; Productivity; ข้าวสาลี; ภาวะโลกร้อน; การเปลี่ยนแปลงสภาพภูมิอากาศ; การพัฒนาพันธุ์; การเจริญเติบโต; ผลผลิต.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5620

Large scale demonstrations at Farm Suwan : I. Report on field operation
Provedor de dados: Thai Agricultural Research Repository
Autores: Aschan Sukthumrong.
1 table
Palavras-chave: Corn; Maize; Sorghum; Planting; Demonstration plot; Field operation; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; การปลูก; การเจริญเติบโต; ผลผลิต; แปลงสาธิต; การจัดการแปลงปลูกพืช.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3769

Regional sorghum variety test
Provedor de dados: Thai Agricultural Research Repository
Autores: Chalaw Chawanapong; Chawana Boonreung; Somrak Noradechanon; Prakob Jan-aram.
4 tables
Palavras-chave: Sorghum; Regional test; Variety test; Growth; Yields; ข้าวฟ่าง; การทดสอบพันธุ์ในหลายท้องที่; การทดสอบสายพันธุ์.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3833

ผลของการเปลี่ยนแปลงสภาพภูมิอากาศต่อการเจริญเติบโตและผลผลิตของข้าว
Provedor de dados: Thai Agricultural Research Repository
Autores: Piyapan Srikoom; Nittaya Reunsuk.
The effect of climate change on rice growth and yield had been studied during December, 2010 through March, 2012 at Chiang Rai Rice Research Center, Chiang Rai Province. Experimental design was split plot with three replications. Main plots were planting dates which designed to plant at monthly interval. Sub plots were rice varieties, consisting of Suphan Buri 1 (SPR1), and Suphan Buri 2 (SPR2). Planting method was pre-germinated seed broadcasting with seed rate of 15 kg/rai. The research found that planting in July was appropriate for both SPR1 and SPR2 variety in term of growth, growth duration and yield. Averaged plant heights were 136.4 and 122.3 cm with of SPR1 and SPR2 variety, respectively. The average yields were 827, and 678 kg/rai for SPR1 and...
Tipo: PhysicalObject
Palavras-chave: Global Warming; Climatic change; Growth; Yield; ภาวะโลกร้อน; การเปลี่ยนแปลงสภาพภูมิอากาศ; วันปลูก; ผลผลิต; การเจริญเติบโต.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5591

Corn breeding and genetics
Provedor de dados: Thai Agricultural Research Repository
Autores: Ampol Senanarong.
28 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Variety trials; Selection; Downy mildew; Disease resistance; Growth; Yields; Quality; ข้าวโพด; การปรับปรุงพันธุ์.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3825

Utilization of grain sorghum in broiler rations
Provedor de dados: Thai Agricultural Research Repository
Autores: Khajarern, J.M.; Sarote Khajarern; Winai Pralumkarm; Tawee Keokong.
3 tables
Palavras-chave: Broiler chickens; Sorghum; Rations; Feeding value; Feeding; Feeds; Ingredients; Growth; Carcass quality; ข้าวฟ่าง; คุณค่าทางอาหารสัตว์; สูตรอาหาร; ไก่กระทง.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3880

Nutritive value of Suwan1 and hyhrid 2301 corn and KU257 and DA 80 sorghum in normal and sub-normal protein level broiler rations
Provedor de dados: Thai Agricultural Research Repository
Autores: Prateap Rachapaetayakom; Supaporn Isariyodom.
4 tables
Palavras-chave: Broiler chickens; Rations; Proteins; Corn; Maize; Sorghum; Nutritive value; Suwan 1; Hybrid 2301; KU 257; DA 80; Feeds; Ingredients; Feeding; Growth; Feed conversion efficiency; Feed intake; ข้าวโพด; ข้าวฟ่าง; คุณค่าทางอาหาร; พันธุ์สุวรรณ 1; พันธุ์ลูกผสม; พันธุ์สุวรรณ 2301; พันธุ์เคยู 257; พันธุ์ดีเอ 80; ระดับของโปรตีน; สูตรอาหาร; ไก่กระทง.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4118

Integrated research program on soil and fertilizer, requirement for increasing yields of corn and sorghum
Provedor de dados: Thai Agricultural Research Repository
Autores: Amnat Suwanarit; Aschan Sukthumrong; Jongruk Chanchareonsook; Kanchana Laosrichareonsakul; Sakkasem Soonthornphat; Nuntarat Supakamnerd; Lawal Powpaichit; Sorasith Vacharotayan.
2 ill., 23 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizers; Nitrogen fertilizers; Phosphate fertilizers; Rock phosphate; Mixed fertilizers; Intercropping; Cropping systems; Soil types; Nutrient uptake; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบปุ๋ย; ความอุดมสมบูรณ์ของดิน; การเพาะปลูก; การจัดการดิน.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3927

Physiological studies of corn and sorghum production
Provedor de dados: Thai Agricultural Research Repository
Autores: Pismai Srisukphrasert; Teerasak Manupeerapan; Atcharee Rakla; Nipa Kaewborisutsakul.
7 tables
Palavras-chave: Corn; Maize; Sorghum; Physiology; Growth; Maturity; Spacing; Population densities; Varieties; Downy mildew; Disease resistance; Yields; Dry weight; Quality; ข้าวโพด; ข้าวฟ่าง; ระยะระหว่างแถว; ความหนาแน่นของประชากร; โรคราน้ำค้าง.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4064

การวิจัยการผลิตข้าวโพดเลี้ยงสัตว์หลังนา
Provedor de dados: Thai Agricultural Research Repository
Autores: Somchai Boonpradub; Sanayh Kraokaw; Wanchai Thanomsub.
Palavras-chave: Corn; Maize; Post-rice condition; No tillage; Growth; Grain yield; Production; ข้าวโพด; ข้าวโพดเลี้ยงสัตว์; ข้าวโพดหลังนา; การปลูก.
Ano: 2003
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4536

ผลของการตัดขยายระยะต่อการเติบโต การใช้น้ำ และคุณสมบัติของดินบางประการของสวนป่าไม้ต่างถิ่นในที่สูง
Provedor de dados: Thai Agricultural Research Repository
Autores: Kritsanakorn Phankham.
Thesis (M.Sc. in Forestry)
Tipo: PhysicalObject
Palavras-chave: Exotic tree plantation; Thinning; Growth; Water use; Soil properties; High land; ไม้กระถินดอย; สวนป่าไม้ต่างถิ่น; การเติบโต; การใช้น้ำ; คุณสมบัติของดิน; การตัดขยายระยะ; ผลผลิต.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5463

Sweet corn breeding
Provedor de dados: Thai Agricultural Research Repository
Autores: Tavat Lavapauraya.
3 tables
Palavras-chave: Corn; Maize; Sweet corn; Plant breeding; Selection; Variety trials; Growth; Yields; ข้าวโพด; ข้าวโพดหวาน; การปรับปรุงพันธุ์; โรคราน้ำค้าง; รสชาติ; ผลผลิตฝักสด.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3824

การใช้ข้าวโพดไร่สีม่วงในอาหารนกกระทาญี่ปุ่น
Provedor de dados: Thai Agricultural Research Repository
Autores: Phunrapee Amnueysit; Komsan Amnueysit; Nuanchan Paraksa; Saksom Attamangkune; Wisittiporn Suksombat.
2 tables
Palavras-chave: Corn; Maize; Purple corn; Rations; Japanese quails; Feeds; Growth; Feed conversion efficiency; ข้าวโพดไร่สีม่วง; อาหารสัตว์; นกกระทาญี่ปุ่น; สูตรอาหาร; การเจริญเติบโต; ผลผลิตไข่; สมรรถภาพการผลิต; สีไข่แดง.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4234

Studies on the effect of nitrogen and phosphate fertilizer on growth and yield of irrigated IS 8719 sorghum variety grown on Roi-Et soils
Provedor de dados: Thai Agricultural Research Repository
Autores: Mongkol Panichkul; Pradit Boonampol.
1 table
Palavras-chave: Sorghum; Nitrogen fertilizers; Phosphate fertilizers; IS 8719; Irrigation; Growth; Yields; Roi-et soil; ข้าวฟ่าง; ปุ๋ยไนโตรเจน; ปุ๋ยฟอสเฟต; การให้น้ำชลประทาน.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3868

Influences of soil properties and stem density on the growth and inner bark biomass of paper mulberry (Broussonetia papyrifera) in natural stands
Provedor de dados: Thai Agricultural Research Repository
Autores: Tanasombat, M.; Sakurai, K.; Thammincha, S.; Thaiutsa, B.
Palavras-chave: Growth; Bark; Biomass; Paper; Mulberry.
Ano: 2005
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4976

Animal nutrition studies
Provedor de dados: Thai Agricultural Research Repository
Autores: Prateap Rachapaetayakom.
20 tables
Palavras-chave: Chickens; Chicks; Corn; Maize; Opaque-2; Protein diet; Rations; Nutritive value; Varieties; Mycotoxin; Feed contamination; Growth; Animal performance; ข้าวโพด; ยีนโอเพค 2; โปรตีน; สูตรอาหาร; ลูกไก่; ไก่กระทง.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3767

International training
Provedor de dados: Thai Agricultural Research Repository
Autores: Smeltzer, Dale G.
9 tables
Palavras-chave: Corn; Maize; Mungbeans; Training programs; Variety trials; Mixed cropping; Nitrogen fertilizers; Growth; Yields; ข้าวโพด; โครงการฝึกอบรม.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3885

Agronomic studies of corn and sorghum during 1977
Provedor de dados: Thai Agricultural Research Repository
Autores: Supot Faungfupong; Wasana Wongyai; Kittima Montranon; Surapol Chowchong.
12 tables
Palavras-chave: Corn; Maize; Sorghum; Growth; Nitrate reductase; Agronomic characters; Dry weight; Nitrogen fertilizers; Weed control; Yields; ข้าวโพด; ข้าวฟ่าง; การเจริญเติบโต; การแข่งขันกับวัชพืช.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3921

Sorghum variety improvement
Provedor de dados: Thai Agricultural Research Repository
Autores: Jinda Jan-orn; Teerasak Manupeerapan; Chawana Boonreung; Prakob Jan-aram; Pratuan Sawangsri; Somchai Piyawarn; Julee Tippayaruk; Sirichai Unsrisong; Pontip Chungmanoch.
9 tables
Palavras-chave: Sorghum; Variety improvement; Population improvement; Feed quality; Sorghum hybrids; Variety trials; Growth; Yields; ข้าวฟ่าง; การปรับปรุงประชากร; คุณค่าทางอาหารสัตว์; ข้าวฟ่างลูกผสม.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3820

Endomycorrhizal effects on phosphorus uptake and yield increasing in corn
Provedor de dados: Thai Agricultural Research Repository
Autores: Omsub Nopamornbodi; Yenchai Vasuvat.
4 tables
Palavras-chave: Corn; Maize; Endomycorrhiza; Phosphate fertilizers; Phosphorus uptake; Growth; ข้าวโพด; เอนโดไมคอร์ไรซา; การเจริญเติบโต; การดูดใช้ฟอสฟอรัส.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4020

International training
Provedor de dados: Thai Agricultural Research Repository
Autores: Smeltzer, Dale G.
8 tables
Palavras-chave: Corn; Maize; Training programs; Varietal trials; Varieties; Fertilizer trials; Population density trials; Soil management trials; Crop management; Weed control; Plant breeding; Downy mildew; Growth; Yields; ข้าวโพด; โครงการฝึกอบรม.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3813

Suwan 2 corn, KU257, KU300 and DA80 sorghum in broiler ration
Provedor de dados: Thai Agricultural Research Repository
Autores: Prateap Rachapaetayakom; Supaporn Isariyodom.
5 tables
Palavras-chave: Broiler chickens; Corn; Maize; Sorghum; Suwan 2; KU 257; KU 300; DA 80; Rations; Feeds; Ingredients; Growth; Feed conversion efficiency; ข้าวโพด; ข้าวฟ่าง; พันธุ์สุวรรณ 2; พันธุ์เคยู 257; พันธุ์เคยู 300; พันธุ์ดีเอ 80; สูตรอาหาร; ไก่กระทง.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4082

Studies on the influences of nitrogen fertilizer on growth and yield of three irrigated sorghum varieties in dry season
Provedor de dados: Thai Agricultural Research Repository
Autores: Unkasem, B.; Thawonmas, D.
1 table
Palavras-chave: Sorghum; Nitrogen fertilizers; Varieties; Growth; Yields; ข้าวฟ่าง; ปุ๋ยไนโตรเจน; การให้น้ำชลประทาน; การทดสอบผลผลิต.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3867

Sorghum breeding
Provedor de dados: Thai Agricultural Research Repository
Autores: Aran Patanothai; Hasachai Boonjoong; Sutiporn Anansuchatkul; Kamol Lertrat.
16 tables
Palavras-chave: Sorghum; Plant breeding; Yield trials; Lines; Growth; Yields; ข้าวฟ่าง; การทดสอบผลผลิต; การประเมินสายพันธุ์.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3821

Growth and water use of corn as affected by tillage practices and irrigation frequencies
Provedor de dados: Thai Agricultural Research Repository
Autores: Tawatchai Na Nagara; Chakranopakhun Tongyai; Paiboon Rattanaprateep.
2 ill., 2 tables
Palavras-chave: Corn; Maize; Tillage; Irrigation; Growth; Yields; Water use; Soil water content; ข้าวโพด; การไถพรวน; การใช้น้ำชลประทาน; อัตราการเจริญเติบโต.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4135

Preliminary studies of physiology in corn production
Provedor de dados: Thai Agricultural Research Repository
Autores: Pismai Srisukphrasert; Acharee Prasarn.
5 tables
Palavras-chave: Corn; Maize; Physiology; Growth; Varieties; Downy mildew; Disease resistance; Yields; ข้าวโพด; การผลิต; สรีรวิทยา; โรคราน้ำค้าง; ระยะปลูก; ความหนาแน่นของประชากร; การเจริญเติบโต; การพัฒนาของพืช.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3922

Cumulative effects of urea and ammonium sulfate on corn grown in second year on reddish brown lateritic soil
Provedor de dados: Thai Agricultural Research Repository
Autores: Amnat Suwanarit; Sodsai Changsaluk.
2 ill.
Palavras-chave: Corn; Maize; Growth; Urea; Ammonium sulphate; Reddish brown lateritic soil; ข้าวโพด; การเจริญเติบโต; ปุ๋ยยูเรีย; อะลูมิเนียมซัลเฟต; ดินชุดปากช่องสีแดง.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4249

ผลของการให้น้ำที่มีต่อการเจริญเติบโตและผลผลิตของต้นสตรอเบอรี่
Provedor de dados: Thai Agricultural Research Repository
Autores: Chusak Sajjapongse.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Fragaria ananassa; Strawberries; Irrigation; Growth; Yield; สตรอเบอรี่; การให้น้ำ; การเจริญเติบโต; ผลผลิต; คุณภาพ.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5500

Characterization of Factors involved in the tissue culture growth recovery and the sustainability of thr GUS activity in Hevea Brasiliensis friable calli transformed by Agrobacterium Tumefaciens
Provedor de dados: Thai Agricultural Research Repository
Autores: Rattana, W.; Teinseree, N.; Tadakittisarn, S.; Pujade-Renaud, V.; Mongkolsook, Y.; Montoro, P.
Palavras-chave: Tissue; Culture; Growth; Recovery.
Ano: 2001
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4988

การเข้ากันได้และการเจริญเติบโตในระยะแรกของพลับพันธุ์ Fuyu บนต้นตอเพาะเมล็ดชนิดต่าง ๆ
Provedor de dados: Thai Agricultural Research Repository
Autores: Watcharaphon Satheinkhot.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Diospyros kaki; Grafting; Fuyu persimmon; Seedling rootstocks; Species; Scions; Growth; Compatibility; พลับ; การขยายพันธุ์; การต่อกิ่ง; ต้นตอเพาะเมล็ด; พันธุ์เต้าซื่อ; พันธุ์ Fuyu; ชนิด; กิ่งพันธุ์; การเจริญเติบโต; การเข้ากันได้.
Ano: 2005
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5496

ความสัมพันธ์ของความแตกต่างทางพันธุกรรมของยีน Insulin-like growth factor II (IGF-II) ต่อลักษณะการเจริญเติบโตและขนาดร่างกายในประชากรสุกรเชิงการค้าแห่งหนึ่ง
Provedor de dados: Thai Agricultural Research Repository
Autores: Praew Thengpimol; Thanathip Suwanasopee; Supamit Mekchay; Skorn Koonawootrittriron.
Tipo: Collection
Palavras-chave: Swine; Insulin-like growth factor II; Growth; Body length; Shoulder width; Hip width; Backfat depth; Loin dept; Percent lean; Body conformation; IGF-II gene; สุกร; หมู; ประชากรสุกร; ความแตกต่างทางพันธุกรรม; ยีน Insulin-like growth factor II; ยีน IGF-II; จีโนไทป์; อัลลีล; การเจริญเติบโต; ขนาดร่างกาย; ความยาวลำตัว; ความกว้างไหล่; ความกว้างสะโพก; ความลึกไขมันสันหลัง; ความลึกเนื้อสัน; เปอร์เซ็นต์เนื้อแดง; การใช้ประโยชน์; การคัดเลือกพันธุ์.
Ano: 2009
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5846

การศึกษาขนาดของเมล็ดพันธุ์ข้าวโพดหวานอินทรี 2 ที่มีผลต่อการเจริญเติบโตและคุณภาพของฝักสดในฤดูปลูกที่แตกต่างกัน
Provedor de dados: Thai Agricultural Research Repository
Autores: Thomya Thongluang; Supranee Ngamprasitthi; Thamrongsilpa Pothisoong; Surapol Chowchong; Sangkhae Nawanich.
4 tables
Palavras-chave: Corn; Maize; Seed size; Hybrids; Insee 2; Growth; Quality; Fresh ear yield; ข้าวโพด; ข้าวโพดหวาน; ขนาดเมล็ดพันธุ์; การเจริญเติบโต; ผลผลิต; คุณภาพ; ฤดูปลูก; ชุดดินปากช่อง.
Ano: 2003
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4556

Effects of preplant herbicides applied for control of purple nutsedge (Cyperus rotundus) on growth and yield of corn (Zea mays)
Provedor de dados: Thai Agricultural Research Repository
Autores: Umporn Suwunnamek; Suthep Thongma.
10 tables
Palavras-chave: Corn; Maize; Weeds; Pre-plant herbicides; Yields; Growth; Purple nutsedge; Cyperus rotundus; ข้าวโพด; แห้วหมู; การเจริญเติบโต; สารกำจัดวัชพืชแบบก่อนปลูก.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4299

Effect of rate and time of application of phosphorus and nitrogen on corn
Provedor de dados: Thai Agricultural Research Repository
Autores: Sibawihi.
1 table
Palavras-chave: Corn; Maize; Phosphorus fertilizers; Nitrogen fertilizers; Application rates; Timing; Growth; Yields; ข้าวโพด; ปุ๋ยฟอสฟอรัส; ปุ๋ยไนโตรเจน.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3779

Feeding value of hard endosperm Opaque-2 corn, high lysine sorghum and various varieties of low tannin sorghum for broiler
Provedor de dados: Thai Agricultural Research Repository
Autores: Prateap Rachapaetayakom; Ankana Hanbranchong; Suporn Sukhupanyaraxa.
9 tables
Palavras-chave: Broiler chickens; Corn; Maize; Sorghum; Opaque-2; Hard endosperm; Feeding value; Lysine; Tannin; Rations; Feeding; Feeds; Ingredients; Growth; ข้าวโพด; ข้าวฟ่าง; โอเพค 2; แป้งแข็ง; คุณค่าทางอาหารสัตว์; ไลซีน; แทนนิน; สูตรอาหาร; ไก่กระทง.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3879

ผลการเปลี่ยนแปลงสภาพแวดล้อมต่อการเจริญเติบโตและให้ผลผลิตข้าว
Provedor de dados: Thai Agricultural Research Repository
Autores: Khemporn Petcharaporn; Nittaya Ruensuk.
Investigation was made of growth and yield rice in response to different environments of irrigated rice varieties in paddy field at Klong Luang Rice Research Center during 2012 to 2013.  The objective of this research was to correlate the effect of climate change on growth and rice yield.  Five non-photoperiod sensitive rice varieties (Suphanburi 1, Suphanburi 2,  Pathumtani 1, RD 29 and RD 43)  were varied planting date. The results showed that 1) Increasing of the mean temperature, rain, humidity, wind speedy and the cumulative of sunshine per day will tend increasing height and number tiller of rice  during  sowing date to tillering stage.  2) Low temperature and lese of the cumulative amount of sunshine per day effect to the ripening stage was shorter...
Tipo: PhysicalObject
Palavras-chave: Rice; Climate change; Growth; Yield; Global warming; ข้าว; สภาพภูมิอากาศ; การเจริญเติบโต; ผลผลิต; พันธุ์.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5623

ผลของการตัดสางขยายระยะต่อปริมาณการสูญเสียดินและน้ำในสวนป่าไม้ต่างถิ่น สถานีเกษตรหลวงอ่างขาง จังหวัดเชียงใหม่
Provedor de dados: Thai Agricultural Research Repository
Autores: Sitthisak Moukomla.
Thesis (M.Sc. in Forestry)
Tipo: PhysicalObject
Palavras-chave: Exotic tree plantation; Thinning; Growth; Water losses; Royal Angkhang Agricultural Station; Aleurities montana; Zelkova serrata; Liquidambar formosana; ป่าไม้; สวนป่าไม้ต่างถิ่น; การตัดสางขยายระยะ; การสูญเสียดิน; การสูญเสียน้ำ; สถานีเกษตรหลวงอ่างขาง; จ.เชียงใหม่.
Ano: 2002
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5464

Varietal comparison of some sorghum grains for broiler feed
Provedor de dados: Thai Agricultural Research Repository
Autores: Khajarern, J.M.; Khajarern, S.; Laosuwan, K.; Bunsiddhi, D.
1 ill., 3 tables
Palavras-chave: Broiler chickens; Sorghum; Feeds; Ingredients; Chemical composition; Varieties; Growth; Feed utilization; ข้าวฟ่าง; อาหารสัตว์; ไก่กระทง; โปรตีนหยาบ; แทนนิน; กรดอะมิโน; สูตรอาหาร.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3942

การจัดการฟางข้าวในพื้นที่ทำนาอย่างต่อเนื่อง
Provedor de dados: Thai Agricultural Research Repository
Autores: Nittaya Ruensuk; Pranom Mongkonbunjong; Chalermchat Leuchikam; Wassana Inthalaeng.
Straw management by incorporation into the soils is an alternative method to avoid straw burning before land preparation.The experiment was conducted at Pathum Thani Rice Research Center and Suphan Buri Rice Research Center during 2006-2007. It was comprised of 3 trials, i.e., effect of amount of straw incorporated into soils to rice growth and yield, effect of straw management methods to rice growth and yield, and effect of straw incorporation period to rice growth and yield. The results showed that straw incorporation rate of 0-800 kg/rai did not affect early growth stage (number of plants/m2 at 15 days after planting) and yield. Number of plants/m2 at 15 days after planting was decreased by straw incorporation at the rate of 1,200-1,600 kg/rai whereas...
Tipo: Collection
Palavras-chave: Rice; Straw management; Straw incorporation period; Growth; Yield; ข้าว; การจัดการฟางข้าว; การไถกลบ; ระยะเวลาการหมัก; การเจริญเติบโต; ผลผลิต.
Ano: 2008
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5100

KU 257 sorghum and Thai opaque corn in broiler and growing pig rations
Provedor de dados: Thai Agricultural Research Repository
Autores: Prateap Rachapaetayakom; Narm Sirisatern; Supaporn Isariyodom.
7 tables
Palavras-chave: Broiler chickens; Pigs; Rations; Corn; Maize; Sorghum; KU 257; Opaque-2; Feeding; Feeds; Ingredients; Growth; Carcass quality; Feed conversion efficiency; Costs; ข้าวโพด; ข้าวฟ่าง; พันธุ์เคยู 257; โอเพค 2; สูตรอาหาร; ไก่กระทง; สุกร.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3990

Age and growth of Hypophthalmus edentatus (Spix), (Siluriformes, Hypophthalmidae) in the Itaipu Reservoir, Paraná, Brazil
Provedor de dados: Zoologia
Autores: Ambrósio,Ângela Maria; Gomes,Luiz Carlos; Agostinho,Ângelo Antônio.
Age and growth of Hypophthalmus edentatus (Spix, 1829) (Siluriformes, Hypophthalmidae) was determined. Data were collected from December 1983 to November 1984 and from April 1997 to March 1998 in the Itaipu Reservoir. To evaluate reading consistency, it was analyzed the coefficient of variation of the total length for each annulus observed in the otoliths. Through marginal increment analysis, it was determined that the annuli formed annually (April) indicating that otoliths may be used in the study of age and growth of the species. Food supply was considered the main factor affecting growth and annuli formation in both periods. Back-calculated data were used to assess if the Rosa Lee phenomenon, commom in selective samples like commercial fishing, occured....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Growth; Hypophthalmus edentatus; Itaipu Reservoir; Otoliths.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200002

Crescimento de Aegla platensis Schmitt em ambiente natural (Crustacea, Decapoda, Aeglidae)
Provedor de dados: Zoologia
Autores: Bueno,Alessandra Angélica de Pádua; Bond-Buckup,Georgina; Buckup,Ludwig.
The crustaceans of the genus Aegla Leach, 1820 are found in streams, rivers and lakes from Franca, São Paulo, Brazil (20º60'S, 47º40'W), to Ilha Madre de Dios, Chile (50º01'10"S, 75º18'45"W) in South America. The growth and cheliped asymmetry of Aegla platensis Schmitt, 1942 were analyzed. The animals were collected from July 1997 to September 1998 at Arroio do Mineiro, Taquara, Rio Grande do Sul, Brazil (29º46'S, 50º53"W). The sex, length, width of the carapace and the total weight of the crab were registered. And after that, the animals were returned to the stream. In the statistical analysis von Bertalanffy's model was used. The growth curves in length (mm) of males and females are described, respectively, by the following equations: L1 = 17.39 [1 - e...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crustacea; Decapoda; Aegla platensis; Growth.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000100006

Estudo do crescimento e da reprodução de Bradybaena similaris (Férussac) (Mollusca, Xanthonychidae) em laboratório
Provedor de dados: Zoologia
Autores: Almeida,Marcelo Nocelle de; Bessa,Elisabeth Cristina de Almeida.
Biological aspects of Bradybaena similaris (Férussac, 1821) were studied, such as: onset of sexual maturity, occurrence of self-fertilization, oviposition, incubation period, eclosion rate and shell length measurement at different stages of development. It was noted that in isolated B. similaris the minimum and maximum time for reaching sexual maturity were 109 and 180 days, respectively. When kept in groups, the minimum time was 78 days. The occurrence of self-fertilization was observed in 18.4% of specimens. The total number of eggs per oviposition varied from one to 38 (average: 3,5 ± 7,15), the total number of eggs per mollusc varied from one to 39 (average: 7,0 ± 10,21) and the total number of oviposition per mollusc varied form one to six (averege:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bradybaena similaris; Biology; Growth; Reproduction.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400010

Crescimento de Schizodon Intermedius Garavello &amp;amp; Britski (Ostheichthyes, Anostomidae) do Rio Tibagi (Sertanópolis, Paraná)
Provedor de dados: Zoologia
Autores: Orsi,Mário Luís; Shibatta,Oscar Akio.
This work consists of age, growth, and circuli formation period determination and the relation of reproduction, temperature, and pluviosity on the growth of S. intermedius Garavello &amp;amp; Britski, 1990. The growth curve was adjusted by the Bertalanfy's expression and the relationship between weight and size was made by the minimum square method to determine the conditioning factor. Gonadossomatic index (IGS) was used to study the reproduction. The assintotic values for length were 33,94 cm and 44,81 cm for males and females, respectively. The circulus were formed annually and the growth was slow and the maximum age was determined to be nine years. The formation of the circuli was influenced by the reproduction, probably allied to other abiotic factors...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Schizodon intermedius; Age; Growth; Tibagi river.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300009

Crescimento em Goniopsis cruentata (Latreille) (Crustacea, Brachyura, Grapsidae) em laboratório
Provedor de dados: Zoologia
Autores: Silva,Zilanda de Souza; Oshiro,Lídia Miyako Yoshii.
The growth of the crab Goniospis cruentata (Latreille. 1803), was studied in the laboratory, through of the molt increment and intermolt period. A total of 86 crabs (48 males and 38 females) were collected in the ltacuruçá's Mangrove in Mangaratiba's county. Rio de Janeiro. The crabs were maintened in the laboratory in four 1000 l tanks, with continuous water circulation during fifteen months. They were fed each two days with pieces of fish and fruits. The crabs varied in size from 19.3 to 56.0 mm in males and 23.3 to 48.8 mm in females. The males presented until four molts during the experiment and the females until six molts. The molts oceurred during ali the months. The mean percentage of molt increment was 6.1 ± 2.7%, for both sexes and it decreased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachyura; Goniopsis cruentata; Growth; Molt increment; Intermolt period; Laboratory.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300028

Estudo do crescimento e da reprodução de Leptinaria unilamellata (D'orbigny) (Mollusca, Subulinidae) em laboratório
Provedor de dados: Zoologia
Autores: Almeida,Marcelo Nocelle de; Bessa,Elisabeth Cristina de Almeida.
Biological aspects of Leptinaria unlamellata (d'Orbigny, 1835) were studied, such as: onset of sexual maturity, occurrence of self-fertilization and shell length measurement at different stages of development. In isolated specimens of L. unilamellata, sexual maturity was reached at 74 days (minimum time) and 104 days (maximum time). For the grouped specimens, the minimum time was 71 days. The occurrence of self-fertilization was observed in both species, 100% of specimens. The total numberof young per birth varied from one to 22 (average: 7,35 ± 5,78), the total number of offsprings per mollusc varied from two to eight (average: 4,1 ± 1,41) and total number of young per mollusc varied from five to 46 (average: 30,21 ± 8,08). As to the shell length in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leptinaria unilamellata; Biology; Growth; Reproduction.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400009

Estudo populacional do camarão-rosa Penaeus Paulensis pérez farfante (natantia, penaeidae) na Lagoa da Conceiçáo, Santa Catarina, Brasil
Provedor de dados: Zoologia
Autores: Branco,Joaquim Olinto; Verani,José Roberto.
In the time period between May/92 to April/93, 2693 (1243 males and 1450 females) specimens of Penaeus paulensis Pérez Farfante, 1967 were collected. The shrimps were captured by night using a hand net in äreas between 30 to 150 cm deep. The abundance of P. paulensis is regulated mainly by the temperature, the summer being the season of greater profusion. The major recruiting period takes place in the Spring with shrimps measuring between 1,0 to 3,0 cm and approximately 2,0 months old. The population reaches the pre-adult in the Fall-Winter period with average length between 8,8 cm (females) and 9,3 cm (males). The migration to the ocean occurs during the Winter. The artisanal fishing in the Conceição Lake is predatory, acting upon the young and pre-adult...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Penaeus paulensis; Populational structure; Growth; Migration; Conceição Lake.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000200008

Size distribution of the jack Chloroscombrus chrysurus (Linnaeus) (Actinopterygii, Carangidae) in a tropical bay at Southeastern Brazil
Provedor de dados: Zoologia
Autores: Costa,Marcus R. da; Albieri,Rafael J.; Araújo,Francisco G.
Chloroscombrus chrysurus (Linnaeus, 1766) is the most abundant representant of the Carangidae family in the Sepetiba bay, a c.a. 450 km² semi-closed coastal area in the Southeastern Brazil. We analyze fish (number, weight and size) and environmental data to assess the part of life history of this species in tropical embayment environments. Fish sampling were taken in triplicates by monthly bottom trawls, in three bay zones (inner, middle and outer), defined according to a spatial gradient of depth and salinity. Juveniles were firstly caught in the inner bay zone measuring 30-90 mm total length - TL (mode = 60 mm TL) in Spring. Then they move toward the middle and outermost part of the bay in Summer-Autumn (120-180 mm TL), following a seaward migration to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coastal fishes; Estuaries; Growth; Tropics.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000300009

Idade e crescimento de Gymnogeophagus lacustris Reis &amp;amp; Malabarba, um Cichlidae endêmico da bacia hidrográfica do Rio Tramandaí, Rio Grande do Sul, Brasil
Provedor de dados: Zoologia
Autores: Hartz,Sandra Maria; Bruschi Junior,Willi; Formehl,Márcio Vanini.
In the present study it was examined the age and growth of Gymnogeophagus lacustris Reis &amp;amp; Malabarba, 1988 in Caconde lagoon (Tramandaí River Basin). The specimens (1080 males and 267 females) were collected monthly, between July 1992 and June 1993. The growth curve in total length was obtained by von Bettalanffy expression and the weight curve through the dedutive method supported by the mathematical expressions of the length growth curve and the length/weight relationship. Formation of the annulli in scales ocurred between winter and spring, and the first anual ring appears when the animals are aproximately 1.5 years old. L∞ and W∞ obtained for males and females, were 206.6mm and 157.3g and 120.2mm and 30.2g, respectively, demonstrating a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gymnogeophagus; Growth; Coastal lagoon; Rio Grande do Sul; Brazil.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000300005

Development and reproduction in Bulimulus tenuissimus (Mollusca: Bulimulidae) in laboratory
Provedor de dados: Zoologia
Autores: Silva,Lidiane C.; Meireles,Liliane M. O.; Junqueira,Flávia O.; Bessa,Elisabeth C. A.
Bulimulus tenuissimus (d'Orbigny, 1835) is a land snail of parasitological importance with a poorly understood biology. The goal of this laboratory study was to determine development and reproductive patterns in B. tenuissimus. Recently hatched individuals in seven groups of 10 were maintained in the laboratory for two years. To test for self-fertilization, 73 additional individuals were isolated. After 180 days the isolated snails showed no signs of reproduction. Subsequently, 30 of these snails were paired to test fertility. We noted the date and time of egg-laying, the number of eggs produced, the number of egg-layings per individual, the incubation period and hatch success. This species shows indeterminate growth. Individuals that were maintained with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Land snail; Reproduction.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000200009

Crescimento e reprodução de Hyale media Dana (Amphipoda, Gammaridae, Hyalidae) associada à Sargassum cymosum C. Agardh
Provedor de dados: Zoologia
Autores: Leite,Fosca Pedini Pereira.
The post-marsupial growth, sexual differentiation, fecundity and reproductive biology of Hyale media Dana, 1853 living on Sargassum cymosum C. Agardh, 1820 are described. The growth was continuous througth 12 stages for males and 9 for females. The sexual differentiation occours at 2th or 3th moult and was demonstrated by the enlargment of the gnatopod II propod. Number of eggs increased with the female head length. Observations of courtship behavior, incubation, moult processes, emergence of juveniles and brood caracteristics were made. The precopula courtship continued for two days, the eggs were incubated for six days and the juveniles, that stay until three days in the marsupium, moult every day.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphipods; Reproduction; Growth; Fecundity; Sargassum.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000300008

Maturation and growth curves of Macrobrachium Carcinus (Linnaeus) (Crustacea, Decapoda, Palaemonidae) from Ribeira de Iguape River, southern Brazil
Provedor de dados: Zoologia
Autores: Valenti,Wagner C; Mello,Jeanette de T.C. de; Lobão,Vera L.
In this paper, female Macrobrachium carcinus (Linnaeus, 1758) maturation curve, weight/length relationship, length and weight growth curves were studied. Prawns were captured, by traps, in Ribeira de Iguape river (24ºS and 47ºW), southern Brazil. There were used 207 females. It was observed that M. carcinus presents several spawnings during its life cycle and reproductive period goes on, at least till six years old. Weight/length relationship can be represented for the equation W = 8.73 E-3 L3.28. Expressions obtained for length and weight growth curves are Lt = 21 .0 (1-e-0493t) and Wt= 190 (1-e-0493t)3.28. respectively. A symptotic maximum length and asymptotic maximum weight are nearly attained at six and eight years old, respectively.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crustacea; Macrobrachium; Maturation; Growth; Prawn.
Ano: 1994
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751994000400009

Tambaqui growth and survival when exposed to different photoperiods
Provedor de dados: Acta Amazonica
Autores: Aride,Paulo Henrique Rocha; Roubach,Rodrigo; Nozawa,Sérgio Ricardo; Val,Adalberto Luís.
The use of different photoperiods (light) were investigated during tambaqui (Colossoma macropomum) juvenile growth under captivity. Light intensity tested was: continuous dark (24hrs without light), natural photoperiod simulation (10hrs of light and 14hrs without light) and continuous light (24 with light). No mortality was recorded among treatments. Significant differences was observed after 50 days of experiment among mean fish weight, fish kept under a continuous darkness showed a better specific growth rate (6.02%) when compared to control fish (natural photo period, 3.67%). Fish exposed to continuous light presented the lowest mean specific growth rate (2.04%). It is possible to improve tambaqui juvenile weight gain performance when kept under...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colossoma macropomum; Juvenile fish; Photoperiod; Growth.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000300015

REPRODUCTION AND CONSERVATION OF THE MAGDALENA RIVER TURTLE (Podocnemis lewyana) IN THE CLAROCOCORNÁ SUR RIVER, COLOMBIA
Provedor de dados: Acta Biológica Colombiana
Autores: CEBALLOS,CLAUDIA P.; ROMERO,ISABEL; GÓMEZ-SALDARRIAGA,CATALINA; MIRANDA,KARLA.
The Magdalena River Turtle, Podocnemis lewyana, is an endangered and endemic turtle from Colombia. Among the most important information needed to conserve endangered species is to identify, monitor, and protect the sites used by the species to reproduce and grow. In this study we report, for the first time, the reproductive output and the nesting beaches of P. lewyana in the Claro Cocorná Sur River, a tributary of the Magdalena River drainage. We systematically examined a river transect of 8 km with 14 sandy beaches during two nesting seasons in one year. We recorded a yearly production of 47 clutches, 957 eggs, and two preferred nesting beaches: Alto Bonito with 51 %, and Bélgica with 28.3 % of this reproductive output. AAFUVER, a community-based...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Incubation temperatures; Nesting.
Ano: 2014
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2014000300006

INTERACTIVE EFFECTS OF SALINITY STRESS AND NICOTINAMIDE ON PHYSIOLOGICAL AND BIOCHEMICAL PARAMETERS OF FABA BEAN PLANT
Provedor de dados: Acta Biológica Colombiana
Autores: MAGDI T,ABDELHAMID; MERVAT SH,SADAK; URS,SCHMIDHALTER; ABDEL-KAREEM M.,EL-SAADY.
A possible survival strategy for plants under saline conditions is to use some compounds that could alleviate the salt stress effect. One of these compounds is nicotinamide (vitamin B3/niacin). The effect of exogenous application of nicotinamide with different concentrations (0, 200 or 400 mg l-1) on faba bean (Vicia faba L.) plant grown at different NaCl levels (0, 50 or 100 mM) was investigated in the wire house of the National Research Centre, Cairo, Egypt. Salinity stress significantly reduced the photosynthetic pigments, polysaccharides, total carbohydrates, total-N contents of shoot, plant height, leaves number, fresh and dry weights of shoot, seed yield, total carbohydrates and total crude protein of the yielded seeds compared with those of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Salt stress; Sodium chloride; Vicia faba; Vitamin B3.
Ano: 2013
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2013000300009

NOTES ON THE BIOLOGY AND ECOLOGY OF Sudanonautes floweri (DE MAN, 1901; CRUSTACEA: BRACHYURA: POTAMOIDEA: POTAMONAUTIDAE) IN RIVER OGBOMWEN, SOUTHERN NIGERIA
Provedor de dados: Acta Biológica Colombiana
Autores: ARIMORO,FRANCIS O; OROGUN,ENAKEME O.
Investigation into some aspects of the biology and ecology of the freshwater crab, Sudanonautes floweri (De Man, 1901) in River Ogbomwen, Edo State, southern, Nigeria was carried out between February and July 2006. The study revealed that the crab species were widespread and abundant in the river. Abundance in terms of number and biomass was more during the wet season with at a peak in the months of June and July. The crab grew allometrically attaining a maximum total length and weight of 11.5 cm and 65 g respectively. The condition factor ranged from 8.60-9.45. These values did not vary with size and sex of the crab but showed seasonal variations. Females of Sudanonautes floweri were more abundant although not significantly different from the expected 1:1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sudanonautes floweri; Condition factor; Growth; Gonadosomatic index; Fecundity; River Ogbomwen.
Ano: 2008
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2008000100004

BIOCHEMICAL AND PHYSIOLOGICAL CHARACTERIZATION OF OIL PALM INTERSPECIFIC HYBRIDS (Elaeis oleifera x Elaeis guineensis) GROWN IN HYDROPONICS
Provedor de dados: Acta Biológica Colombiana
Autores: RIVERA MÉNDEZ,YURANY DAYANNA; MORENO CHACÓN,ANDRÉS LEONARDO; ROMERO,HERNÁN MAURICIO.
The interspecific hybrid, Elaeis oleifera x Elaeis guineensis (OxG) is an alternative for improving the competitiveness and sustainability of the Latin American oil palm agro-industry, because of its partial resistance to some lethal diseases and also because of the high quality of its oil. A comparative characterization was conducted of the physiological and biochemical performance of seedlings of six OxG hybrids grown in hydroponics. Gas exchange, vegetative growth, protein, sugar and photosynthetic pigment content, and antioxidant system activity were determined. With the exception of gas exchange, the other variables showed significant differences between materials. The ´U1273´ and ´U1737´ materials showed greater vegetative growth with no expression...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adaptation; Growth; Nutrient solution; Plant breeding; Stress.
Ano: 2013
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2013000300005

GROWTH PATTERN OF THE TROPICAL HIGHLAND GYMNOPTHALMID LIZARD Anadia bogotensis IN CAPTIVITY CONDITIONS
Provedor de dados: Acta Biológica Colombiana
Autores: CALDERÓN-ESPINOSA,Marta Lucia; RAMÍREZ,Angélica; JEREZ,Adriana.
ABSTRACT We estimated growth pattern and growth rate of individuals of Anadia bogotensis in captivity and under climatic conditions similar to those in the wild. We collected eggs of this species from communal nests from a highland locality in the municipality of La Calera, Cundinamarca, in Colombia. The eggs were incubated in outdoors terrariums, and the growth of the hatchlings was recorded until their death. The growth pattern fits a logistic model, in which individuals grow moderately at the beginning, and then their growth rate increases. The growth rate increases even after individuals reach sexual maturity and seems to decrease close to their maximum body size. It is a fast growing species that reaches sexual maturity at around 50 % of its maximum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Andean highlands; Colombia; Gymnophthalmidae; Growth.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2018000300307

Allelopathic potential of bark and leaves of Esenbeckia leiocarpa Engl. (Rutaceae)
Provedor de dados: Acta Botanica Brasilica
Autores: Souza,Flaviana Maluf; Gandolfi,Sergius; Perez,Sonia Cristina Juliano Gualtieri de Andrade; Rodrigues,Ricardo Ribeiro.
We investigated the inhibitory potential of aqueous extracts of bark and leaves of Esenbeckia leiocarpa Engl. on lettuce germination and early seedling growth. We compared the effects of four concentrations (100, 75, 50 and 25%) of each extract to water and polyethylene glycol (PEG 6000) solution controls for four replicates of 50 seeds for germination and four replicates of ten seedlings for seedling growth. The inhibitory effects of E. leiocarpa extracts on the percentage of germination and on the germination speed seemed to be more than simply an osmotic effect, except for the percentage of seeds germinated in bark extracts. When compared to water control, both bark and leaf extracts delayed germination, and leaf extracts also affected the percentage of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Germination; Growth; Inhibition; Plant-plant interaction.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000100016

Effects of ocean warming, eutrophication and salinity variations on the growth of habitat-forming macroalgae in estuarine environments
Provedor de dados: Acta Botanica Brasilica
Autores: Borburema,Henrique Douglas dos Santos; Lima,Ruth Pessoa de; Miranda,George Emmanuel Cavalcanti de.
ABSTRACT Global change and coastal eutrophication are affecting macroalgae worldwide. We analyzed the effects of increased water temperature (25, 28 and 32 °C) and eutrophication on the growth of Bostrychia binderi and Bostrychia montagnei in a range of salinities (18, 24, 30, 36 and 42 PSU) through three independent multifactorial experiments. Both species had higher growth at 25 °C than at 28 and 32 °C (warming scenario projected by IPCC), suggesting a negative effect of ocean warming. The species showed a broad tolerance to the range of salinities tested, with higher growth at 36 and 42 PSU, as a local adaptation strategy. Oligotrophic seawater significantly affected the growth of both species because the lowest growth was found in this condition,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bostrychia; Bostrychietum; Climate change; Ecophysiology; Estuarine macroalgae; Eutrophication; Global change; Growth; Salinity variation; Sea level rise.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400662

Combined effects of low light and water stress on Jatropha curcas L. promotes shoot growth and morphological adjustment
Provedor de dados: Acta Botanica Brasilica
Autores: Carneiro,Isabella Christina Silveira; Pereira,Eduardo Gusmão; Souza,João Paulo.
Jatropha curcas (physic nut) is a plant with economic and pharmaceutical uses. Basic studies on the influence of environmental factors on the early development of J. curcas are important for improving farming techniques and increasing productivity. This study investigated the adjustments of J. curcas to the environmental factors of drought and light stress in order to determine which factors most strongly affect the allocation of biomass during early growth. Leaves, stems, and roots of young plants were sampled and leaf area was measured during January and June in 2011. Plants of J. curcas that were grown in shade and subjected to water stress showed higher biomass allocation to aerial parts (mainly stems), which can be explained as a strategy for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Jatropha curcas; Leaf area; Light stress; Water deficit.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400467

Deleterious effect of TRIS buffer on growth rates and pigment content of Gracilaria birdiae Plastino &amp;amp; E.C. Oliveira (Gracilariales, Rhodophyta)
Provedor de dados: Acta Botanica Brasilica
Autores: Ursi,Suzana; Guimarães,Melina; Plastino,Estela Maria.
This work evaluated the effects of Tris (hydroxymethyl)-aminomethane (TRIS) buffer and its interaction with nutrient concentration on the development of Gracilaria birdie, a common species on the Brazilian coast that has been exploited for agar production. Responses to different conditions were assessed through growth rates and pigment content (chlorophyll a, phycoerythrin, phycocyanin and allophycocyanin). Provasoli's nutrient solution with and without TRIS addition was tested at concentrations of 12.5, 25 and 50%. The pH was also monitored. G. birdiae grew better in the absence of TRIS and at low nutrient concentrations, 12.5 and 25% (growth rates of 10.8-11.3%.day-1). Higher contents of phycoerythrin and chlorophyll a were observed without TRIS at 12.5...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Culture medium; TRIS (hydroxymethyl)-aminomethane; Gracilaria birdiae; Growth; Pigments.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062008000300024

Phytotoxic effects of aqueous leaf extracts of four Myrtaceae species on three weeds
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Imatomi, Maristela; Novaes, Paula; Miranda, Maria Augusta Ferraz Machado; Gualtieri, Sonia Cristina Juliano.
Research on allelopathic interactions can be useful in the search for phytotoxins produced by plants that may be employed as natural herbicides. The aim of this study was to assess the phytotoxic action of aqueous leaf extract of Blepharocalyx salicifolius, Myrcia multiflora, Myrcia splendens and Myrcia tomentosa on the germination and development of three weeds. The working hypothesis was that leaf extracts of Myrtaceae may negatively influence the development of weed species. Aqueous leaf extracts at 5 and 10% (g mL-1) were tested on the germination and growth of Euphorbia heterophylla, Echinochloa crus-galli and Ipomoea grandifolia and compared with the herbicide oxyfluorfen and distilled water (control). The most extracts caused pronounced delays in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomia e fisiologia vegetal allelopathy; Germination; Growth; Herbicide Agronomia.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19079

Vegetative growth response of cotton plants due to growth regulator supply via seeds
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Ferrari, João Vitor; Furlani Júnior, Enes; Ferrari, Samuel; Luques, Ana Paula Portugal Gouvea.
The global cotton industry is distinguished by its numerous industrial uses of the plume as well as by high production costs. Excessive vegetative growth can interfere negatively with productivity, and thus, applying growth regulators is essential for the development of the cotton culture. The objective of this study was to evaluate the development and yield of the cotton cultivar FMT 701 with the application of mepiquat chloride to seeds and leaves. The experimental design used a randomized block design with four replications, arranged in bands.The treatments consisted of mepiquat chloride rates (MC) (0, 4, 6, 8 and 10 g a.i. kg-1 of seeds) applied directly to the cotton seeds and MC management by foliar spray using a 250 mL ha-1 rates that was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.00.00-9; 5.01.03.00-8 mepiquat chloride; Growth; Yield components Manejo e Tratos Culturais.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19664

Comparison between grafting and cutting as vegetative propagation methods for conilon coffee plants - doi: 10.4025/actasciagron.v35i4.16917
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Andrade Júnior, Saul de; Universidade Federal do Espírito Santo/CEUNES.; Alexandre, Rodrigo Sobreira; Universidade Federal do Espírito Santo (UFES/CEUNES).; Schmildt, Edilson Romais; Universidade Federal do Espírito Santo (UFES/CEUNES).; Partelli, Fábio Luiz; Universidade Federal do Espírito Santo (UFES/CEUNES).; Ferrão, Maria Amélia Gava; Empresa Brasileira de Pesquisa Agropecuária; Mauri, Aldo Luiz; Instituto Capixaba de Pesquisa.
The purpose of this study was to assess the growth of conilon coffee tree plantlets that were propagated by grafting and cutting. The experiment was conducted at the plantlet production site of Incaper’s Experimental Farm in the city of Marilândia, Espírito Santo  State. For grafting, plantlets derived from the seed propagation of Coffea canephora cv. Robusta Tropical (ENCAPER 8151) were used as rootstocks, and six clones of cv. Conilon Vitória (INCAPER 8142) were used as the grafts. The cutting was performed with six clones that were used for grafting. The experimental design consisted of randomized blocks of twelve treatments with five repetitions composed of twelve plantlets. On the hundred and fifth day, the averages of the variables were assessed and...
Tipo: Produção vegetal
Palavras-chave: 5.01.00.00-9 Coffea canephora; Coffee; Growth; Cloning Agronomia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16917

Trough and pot crop systems with leaching recirculation and defoliation levels for mini tomatoes
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Perin, Lais; Peil, Roberta Marins Nogueira; Höhn, Daniela; Rosa, Douglas Schulz Bergman da; Wieth, Albertina Radtke; Grolli, Paulo Roberto.
The use of raw rice husk as substrate allows the use of crop systems that promote the recirculation of leachate in long crop cycles. Mini tomatoes present relatively low demand for photoassimilates. Thus, partial defoliation of the sympodium could benefit the crop without damage to the production or quality of the fruits. The objective of this work was to evaluate the plant growth, fruit yield and fruit quality of Cherry Hybrid Wanda and Grape Hybrid Dolcetto mini tomatoes cultivated in two recirculation crop systems (pots and troughs), using raw rice husk as substrate, under three defoliation conditions (without defoliation, removal of one and two leaves of the sympodium). The Cherry cultivar showed higher plant growth, fruit yield and mean fruit size....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências Agrárias; Agronomia; Fitotecnia cherry; Grape; Growth; Solanum lycopersicum; Rice husk; Substrate. Olericultura.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/34992

Recuperação do cafeeiro (Coffea arábica L.) após recepa, submetido a diferentes lâminas de água e parcelamentos da adubação - DOI: 10.4025/actasciagron.v31i2.7039
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Arantes, Kelte Resende; UNEMAT; Faria, Manoel Alves de; UFLA; Rezende, Fátima Conceição; UFLA.
Visando reduzir o período de recuperação das lavouras após a recepa, neste trabalho objetivou-se avaliar a influência de diferentes lâminas de irrigação e do parcelamento da adubação sobre o crescimento do cafeeiro. Foram utilizadas quatro diferentes lâminas de irrigação (0, 40, 80 e 120% da ECA-Precipitação) e três parcelamentos da adubação com N e K (quatro, oito e 12 vezes). O experimento foi conduzido no Sul de Minas Gerais, com o cafeeiro (Coffea arábica cv. Topázio MG-1190), plantado no espaçamento de 1,8 x 0,7 m e recepado 65 meses após o plantio. O delineamento experimental utilizado foi em blocos casualizados com parcelas subdivididas. Os parâmetros avaliados foram altura da planta, diâmetro do ramo ortotrópico, número de internódios e diâmetro da...
Palavras-chave: 5.01.00.00-9 Agronomia café; Irrigação; Crescimento coffee; Irrigation; Growth.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/7039

Determination of Merremia cissoids leaf area using the linear measures of the leaflets - doi: 10.4025/actasciagron.v33i3.6379
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Carvalho, Leonardo Bianco; FCAV-UNESP; Bianco, Silvano; FCAV-UNESP; Galati, Valéria Cury; UNESP; Panosso, Alan Rodrigo; FCAV-UNESP.
Knowledge of the weed leaf area may give support to study the interference relationships between weeds and crops. The objective of this research was to determine a mathematical equation for M. cissoides leaf area estimation based on the relationship between the leaf blade linear measures. Leaves of the species were collected from a variety of agroecosystems at São Paulo State University, Jaboticabal, São Paulo State, Brazil, measuring the length (L), maximum width (W) and real leaf blade area of the three kinds of leaflets. Linear equations Y = a x (X) were estimated for each kind of leaflet. The confidence intervals of the primary leaflet equation overlapped those ones from the secondary leaflet equation, and then only one equation was considered for...
Palavras-chave: Weed; Growth; Roadside woodrose; Linear fit Weed; Growth; Roadside woodrose; Linear fit.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6379

Trough and pot crop systems with leaching recirculation and defoliation levels for mini tomatoes
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Perin, Lais; Peil, Roberta Marins Nogueira; Höhn, Daniela; Rosa, Douglas Schulz Bergman da; Wieth, Albertina Radtke; Grolli, Paulo Roberto.
The use of raw rice husk as substrate allows the use of crop systems that promote the recirculation of leachate in long crop cycles. Mini tomatoes present relatively low demand for photoassimilates. Thus, partial defoliation of the sympodium could benefit the crop without damage to the production or quality of the fruits. The objective of this work was to evaluate the plant growth, fruit yield and fruit quality of Cherry Hybrid Wanda and Grape Hybrid Dolcetto mini tomatoes cultivated in two recirculation crop systems (pots and troughs), using raw rice husk as substrate, under three defoliation conditions (without defoliation, removal of one and two leaves of the sympodium). The Cherry cultivar showed higher plant growth, fruit yield and mean fruit size....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cherry; Grape; Growth; Solanum lycopersicum; Rice husk; Substrate.; Olericultura.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/34992

Development of seedlings of Red Pitaya (Hylocereus undatus Haw) in different substrate volumes - DOI: 10.4025/actasciagron.v30i5.5970
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Andrade, Renata Aparecida de; FCAV/UNESP/Jaboticabal; Martins, Antonio Baldo Geraldo; UNESP; Silva, Marco Túlio Habib; UNESP.
With the ever-increasing search for alternatives by producers and demand for exotic fruits by consumers, the market for fruits species has grown considerably. In this context, the pitaya has been sought not only for its exotic appearance, but also for its organoleptic characteristics. The present research was conducted with the objective of evaluating the influence of the substrate volume in the development of seedlings of red pitaya, by using polystyrene trays expanded with different volumes of cells: 10, 15, 30 and 65 mL. The evaluations, conducted during 90 days, evaluated: survival percentage; number and height of stems (cm); largest root length (cm); fresh and dry masses of the stems and roots (g). The delineation was entirely randomized. The values...
Palavras-chave: 5.01.03.05-9 Melhoramento Vegetal sementes; Cladódios; Crescimento; Altura seeds; Stems; Growth; Height.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5970

Phytotoxicity of leaf aqueous extract of Rapanea umbellata (Mart.) Mez (Primulaceae) on weeds - doi: 10.4025/actasciagron.v35i2.16166
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Novaes, Paula; Universidad de Cadiz; Imatomi, Maristela; Universidade Federal de São Carlos; Miranda, Maria Agusta Ferraz Machado; Universidade Federal de São Carlos; Gualtieri, Sonia Cristina Juliano; Universidade Federal de São Carlos.
Allelopathic substances can be used to develop weed control alternatives based on natural products. The objective of this study was to compare the phytotoxic activity of aqueous leaf extracts of Rapanea umbellata with the toxicity of a synthetic herbicide on the germination and growth of weed species. The weeds species barnyard grass (Echinochloa crus-galli), wild poinsettia (Euphorbia heterophylla) and morning glory (Ipomoea grandifolia) were used. The effects of the aqueous leaf extract of R. umbellata at concentrations of 10% and 5% (g mL-1) were compared to the control (distilled water) and to the synthetic herbicide oxyfluorfen. The average weed germination time was significantly lower (p &amp;lt; 0.05) in control than in extract and herbicide...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomia; Botânica; Fisiologia vegetal; Alelopatia  controle de espécies infestantes allelopathy; Germination; Growth; Initial length; Oxyfluorfen agronomia; Manejo e tratos culturais.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16166

A Lipid-walled microcapsule diet as co-feed for early feeding the Osphronemus gourami (Lacepede) larvae
Provedor de dados: Acta Scientiarum: Animal Sciences
Autores: Sukardi, Purnama; Hana, Hana; Prayogo, Norman Arie; sulistyo, Isdy; Soedibya, Petrus Hary Tjahja; Harisam, Taufan; Winanto, Tjahyo.
 The effects of microcapsule diet as co-feeding for early weaning phase of gourami larvae where evaluated in terms of ingestion rate of microcapsule, growth, and survival rate. The availability of tubifex worms as natural food is uncertain and can introduce pathogens to fish culture from outside environment. Therefore, the attempt to replace or substitute this natural food continues in order to reduce the level of dependence. This research used Complete Randomized Designed (CRD) with four treatments based on a different protocol feeding management. Gourami larvae should be started with the co-feeding on day 12 until day 17 and they are more receptive to microcapsule diets after day 17. The ingestion rate of microcapsule which consumed by the larvae during...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gourami; Feeding management; Microcapsule; Fish larvae; Growth; Survival rate.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/38335

Taxa alimentar no desempenho de juvenis de robalo-peva em tanque-rede - doi: 10.4025/actascianimsci.v33i4.11413
Provedor de dados: Acta Scientiarum: Animal Sciences
Autores: Barbosa, Moysés Cavichioli; Universidade Federal de Santa Catarina; Neves, Fábio de Fárias; Universidade Federal de Santa Catarina; Cerqueira, Vinicius Ronzani; Universidade Federal de Santa Catarina.
O conhecimento da taxa ótima de alimentação para uma determinada espécie não só é importante para promover o maior crescimento e a melhor eficiência na alimentação, mas também para prevenir a deterioração de qualidade de água como resultado do excesso de alimento. O presente estudo teve como objetivo avaliar o desempenho do robalo-peva, Centropomus parallelus cultivado em tanques-rede flutuantes sob o efeito de diferentes taxas alimentares (1; 1,5; 2 e 2,5% da biomassa ao dia e a taxa controle que foi até a saciedade), em condições de cultivo no ambiente natural. Durante 40 dias, cada tratamento foi avaliado em triplicatas e foram verificados os parâmetros biológicos (sobrevivência, taxa de crescimento específico, peso e comprimentos médios finais) e...
Tipo: Criação em condições naturais
Palavras-chave: 5.06.03.00-0 Alimentação; Centropomus parallelus; Crescimento; Cultivo intensivo; Piscicultura Centropomus parallelus; Feeding; Fish culture; Growth; Intensive rearing.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/11413

Effect of nutritional density and season on the performance of young rabbit does before the first mating - doi: 10.4025/actascianimsci.v35i4.19101
Provedor de dados: Acta Scientiarum: Animal Sciences
Autores: Teixeira, Paulo Sergio dos Santos; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Wechsler, Francisco Stefano; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Moura, Ana Silvia Alves Meira Tavares; Universidade Estadual Paulista “Júlio de Mesquita Filho”.
The objective was to evaluate the effect of nutritional density and season on the performance of young rabbit does before the first mating. Forty-eight females from the Botucatu Genetic Group were used in each season (warm or cool), starting at the age of 70 days, housed in groups of four per cage up to 119 days, and reared individually from 120 to 140 days of age. The high-density diet was formulated to contain, on a 90% DM basis, 18.4% CP, 16.5% ADF and 2,500 kcal DE kg-1; whereas the low-density diet was formulated to contain 14.7% CP, 24% ADF and 2,000 kcal DE kg-1. The experiment was conducted according to a 2x2 factorial design (two diets x two seasons) with repeated measures (weeks). The high-density diet promoted lower feed intake, higher final...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.03.00-1 acid detergent fiber; Feed efficiency; Feed intake; Growth; Live weight; Nutrition acid detergent fiber; Feed efficiency; Feed intake; Growth; Live weight; Nutrition.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/19101

Establishment and content of sugars and phenols in Physalis callus obtained from different explants and concentrations of bap and naa  - doi: 10.4025/actascibiolsci.v36i1.18074
Provedor de dados: Acta Scientiarum: Biological Sciences
Autores: Bertoncelli, Douglas Junior; Universidade Tecnológica Federal do Paraná; Oliveira, Marisa de Cacia; Universidade Tecnológica Federal do Paraná; Passos, Amanda Izabel dos; Universidade Tecnológica Federal do Paraná; Ariati, Ana Claudia; Universidade Tecnológica Federal do Paraná; Ortolan, Alexandre Osmar; Universidade Tecnológica Federal do Paraná; Witt, Elaine de Paula; Universidade Tecnológica Federal do Paraná.
Obtaining cells of Physalis pubescens is of interest for studies of primary and secondary metabolic pathways, in the search for new active molecules. Our objectives were to evaluate the regeneration potential of explants from different parts of the plant, growth regulators to be used, and the determination of the growth curve of the callus. We used explants of leaf, root, stem and petiole, cultured on Murashige and Skoog medium with different concentrations of 6-benzylaminopurine and a-naphthaleneacetic acid. The explants from stem and petiole had a higher regeneration potential of the shoot to the treatment with 0.5 mg L-1 6-benzylaminopurine, and the explants of leave and root emitted more roots, with lower production of callus. The tests showed that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.03.00.00-0 cell; Growth; Phenols; Sugars Botânica-biotecnologia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/18074

Crescimento do camarão marinho Farfantepenaeus subtilis (Pérez-Farfante, 1967) cultivado em tanques com diferentes protocolos de fertilização orgânica - DOI: 10.4025/actascibiolsci.v31i3.7565
Provedor de dados: Acta Scientiarum: Biological Sciences
Autores: Souza, Flávia Maria Maciel Carneiro de; UFRPE; Messias, Gustavo Arretche; UFRPE; Fialho, Diogo Henrique Feijó; UFRPE; Soares, Roberta Borda; UFRPE; Correia, Eudes de Souza; UFRPE.
Este trabalho objetivou avaliar o crescimento do camarão Farfantepenaeus subtilis submetido a diferentes regimes de fertilização usando fertilizantes orgânicos e inorgânicos. O desenho experimental consistiu de três tratamentos e três repetições: controle (CT) – 3 mg L-1 de ureia e 0,3 mg L-1 de monoamônio fosfato; farelo de trigo (FT) – 25 g m-2; farelo de soja (FS) – 18,75 g m-2. Nove tanques de 500 L foram estocados com 16 camarões m-2 (≈ 2,7 g), os quais foram alimentados com ração comercial contendo 35% de proteína bruta. Quinzenalmente, a qualidade da água foi monitorada e amostras de camarões foram coletadas para avaliar o crescimento e reajustar a quantidade de ração. Durante o cultivo, a qualidade da água manteve-se adequada ao cultivo do camarão....
Palavras-chave: 2.00.00.00-6    Ciências Biológicas Farfantepenaeus subtilis; Fertilização; Crescimento Farfantepenaeus subtilis; Fertilization; Growth.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7565

Use of alternative media and different types of recipients in a laboratory culture of Ankistrodesmus gracilis (Reinsch) Korshikov (Chlorophyceae) - doi: 10.4025/actascibiolsci.v33i3.8046
Provedor de dados: Acta Scientiarum: Biological Sciences
Autores: Sipauba-Tavares, Lucia Helena; UNESP; Millan, Rodrigo Ney; UNESP; Berchielli, Flávia de Almeida; UNESP; Braga, Francisco Manoel de Souza; UNESP.
A laboratory culture of Ankistrodesmus gracilis algae was evaluated by studying the biology of the species and its chemical composition in a traditional medium (CHU12) and in two alternative culture media, NPK (20-5-20) and macrophyte (Eichhornia crassipes) + NPK, in three different types of recipients (fiberglass, carboy and plastic bag). First peak in the growth curve of Ankistrodesmus gracilis occurred on the ninth day in macrophyte + NPK medium (74.16 x 105 cells mL-1) in a fiberglass recipient. However, highest density (p &lt; 0.01) was reported in medium CHU12 (122.87 x 105 cells mL-1) in a plastic bag on the twelfth day. Cell density was over 70 x 105 cells mL-1 starting on the twelfth day. Growth rate of A. gracilis was similar (p &gt; 0.05) in...
Palavras-chave: 5.06.00.00-1; 50.306-00-0 Algae; Macrophyte medium; NPK; CHU12; Biochemical composition; Growth 2.05.03.00-8 Algae; Macrophyte medium; NPK; CHU12; Biochemical composition; Growth.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8046

Determination of age and its correlation with biometric variables and seasonal reproductive indices of Leporinus obtusidens
Provedor de dados: Acta Scientiarum: Biological Sciences
Autores: Felizardo, Viviane de Oliveira; Andrade, Eliane Aparecida de; Melo, Carlos Cicinato Vieira; Murgas, Luis David Solis; Freitas, Rilke Tadeu Fonseca de; Andrade, Estefânia de Souza.
This study determined the age and its correlation with biometric variables and reproductive indices of piapara Leporinus obtusidens caught at the Funil Reservoir. We caught 133 specimens between September 2006 and August 2007. Weight, total length, standard length, depth, height, head length and radius of the scales were measured. The sex was determined by macroscopic examination of gonads. The age of each fish was determined by analyzing the growth rings on the scales. Seasonal differences in biometric variables were tested using the NK test at 5%. The correlation of age and radius of the scales with the biometric variables and reproductive indices were analyzed using the SAEG software. Fish individuals ranging from 3 to 14 years of age were caught. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.00.00.00-6 biometrics; Fish; Growth; Piapara; Reproduction Ecologia.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28003

Length-weight relationship and condition factor of eight fish species from the upper Araguari River, State of Amapá, Brazil
Provedor de dados: Acta Scientiarum: Biological Sciences
Autores: Prestes, Luiza; Oliveira, Marcos Sidney Brito; Tavares-Dias, Marcos; Soares, Maria Gercilia Mota; Cunha, Fabiana Calacina.
The present study estimated parameters of the length-weight relationship (LWR) and allometric condition factor for eight fish species from the upper Araguari River, in the State of Amapá, Brazil. A total of 615 fish of eight species were analyzed: Acestrorhynchus falcatus, A. falcirostris, Ageneiosus inermis, Hemiodus unimaculatus, Hoplias aimara, Myloplus asterias, M. ternetzi and Tometes trilobatus. The allometric condition factor varied from 0.742 to 1.435. The coefficient of allometry ranged from 2.723 to 3.225. The coefficient of determination (R2) of the LWR ranged from 0.742 to 0.985. This is the first estimate of the length-weight relationship for fish from the Araguari River and the first record of these parameters for Myloplus ternetzi and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Fish stocks; Eastern Amazon; Stock assessment. Growth Fish stocks Eastern Amazon State of Amapá.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46666

Finite modelling of growth and yield of okra using different tillage systems in Obubra, Nigeria
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Odey, Simon Ogbeche.
Abstract:  Field experiment was conducted at the teaching and research farm of Cross River University of Technology, Faculty of Agriculture and Forestry, Obubra Campus. The study was aimed at finite modelling of growth and yield of Okra (Abelmoschus esculentus L.) using different tillage systems. Randomised Complete Block Design (RCBD) was used in the field, 1,024m2 with three treatments and three replicates. These treatments were Conventional, Conservative and Zero tillage. Each treatment had three replicates of size 8m x 8m, separated from each other by 2m for manoeuvring of the tractor. Planting of okra and other cultural practices were carried out. Soil samples were collected for analysis in the laboratory. Data on growth parameters and yield of okra...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Finite; Modelling; Growth; Yield; Okra; Tillage Systems; Soil.
Ano: 2022
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7067

Impact of incorporating Moringaoleifera seed cake as protein source in growing lambs ration.
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: El-Naggar, Soad Ibrahim.
Thirty growing Rahmani lambs (27.25 kg ± 0.25 kg average body weight 6-7 months old) were used to evaluate the impact of incorporating Moringaoleifera seed cake as protein source in a total mixed ration (TMR) for 90 days feeding trial followed by 21 day digestion. Moringaoleifera seed cake (MSC) was used for partial substitution of soybean meal protein by (0, 25 and 50 %) in three experimental rations, control (R1), R2 and R3, respectively. Results indicated that the feeding lambs on R3 recorded a significant (P&lt;0.05) increases in all of nutrients digestibility and nutritive value compared with R1 or R2. All of rumen parameters, pH, ammonia and total volatile fatty acids, were in normal ranges as an indication of healthy.  Also, the highest average...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Department of animal production; National Research Centre Moringa cake; Lambs; Digestibility; Growth.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4586

Effect of zinc foliar application at different physiological growth stages on yield and quality of wheat under sandy soil conditions
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: El-Dahshouri, Mohamad Farouk.
Micronutrients are critical factor for plant production. The main target of this study was to evaluate the effect of rates and time of zinc foliar application on growth, nutrient contents, yield and its components of wheat Sakha94 and Gemmieza9 cultivars under sandy soils conditions. In this regard two field experiments were conducted during 2013/2014 and 2014/2015 seasons at Ismailia Agricultural Experimental Station of the Agricultural Research Center (ARC), Ismailia Governorate, Egypt.Statistical analysis of the illustrated data indicated that all studied characters were significantly affected by zinc foliar application. The highest values of grain and straw yield were resulted under two sprays as compared to the other treatments of zinc application....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dr; Plant Nutrition Wheat; Growth; Nutrient Status; Yield; Zinc Foliar Application; Sandy Soils.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4511

Production and evaluation of compost tea for cultivation of Amaranthus hybridus
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: BAKO, TANKO; MAMAI, EZEKIEL AMBO; ISTIFANUS, AKILA BARDEY.
The application of organic fertilizer to the soil is considered as good agricultural practice because it improves the fertility of the soil and plant quality. The aim of the study was to produce compost tea using poultry droppings, cow dungs and water leaf (Talinum triangulare) in a ratio 5:5:1 and evaluate its effects on soil properties, growth and yield of Amaranthus hybridus. The study was carried out in Jalingo, Taraba State, North-Eastern Nigeria in July, 2019. The experimental variables include control (no treatment), 1 kg of compost per 10 L of water compost tea, 1 kg of compost per 20 L of water compost tea, 1 kg of compost per 30 L of water compost tea, 500 kg ha-1solid compost and 500kg ha-1 NPK fertilizer. The treatment combinations were done in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Yield; Plants; Organic; Fertilizer.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6941

Response of soybean cultivars to weed control treatments
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Dawood, Mona Gergis.
Two field experiments were conducted in two successive seasons, 2015 and 2016, at the experimental farm of the National Research Centre at Nubaria, Egypt, during summer seasons to determine weed management can improve soybean competitiveness with weeds, thus helping to achieve its yield potential. The experiment included three soybean cultivars ( Giza 111, Giza 21 and Crawford) and six weed control treatments, including oxadiargyl, butralin, metribuzin, bentazone + clethodium, two hand and a nonweeded treatment (control). Great reduction in dry weight of broadleaved, grassy and total weeds after 60 and 90 days from sowing was noticed in the plots cultivated with Giza 111 cultivars. Also, Giza 111 cultivars markedly produced greater plant height, SPAD, NAR,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicides; Two hand hoeing; Growth; Yield; Oil percentage.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4438

Effects of Electromagnetic Treatment of Irrigation Water on Growth and Yield of Lagos Spinach (Celosia argentae)
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Adeniran, Kamoru Akanni; Kareem, Kola Yusuff; Yusuf, Karamarudeen Olaniyi; Afolayan, Stephen O.
The effects of magnetic treatment of irrigation water on growth and yield of potted celosia plants (Celosia argentae) grown inside a screen house were investigated. The study was carried out using Completely Randomised Design replicated five times. Water was allowed to pass through five different flux densities of 719, 443, 319, 124 and 0 Gausses (non – magnetized water). Analysis of selected 25 samples of the magnetic flux density experiment (at 6 WAP) showed that mean stem girth irrigated with ordinary water recorded the highest value of 1.95 mm. Mean leaf area of plants irrigated with magnetic flux density of 719 G had a percentage increase of 24.97 %; mean bulk weight of 172.72 g; biomass weight of 133.48 g; and root weight of 39.24 g, when compared...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Celosia argentae; Growth; Yield and magnetic treated water.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5697

Biodegradation of wastewater pollutants by activated sludge coimmobilized with Scenedesmus obliquus
Provedor de dados: Agrociencia
Autores: Ruiz-Marin,Alejandro; Canedo-Lopez,Yunuen; Campos-Garcia,Silvia del C.; Sabido-Perez,Mirna Y.; Zavala-Loria,José del C.
Wastewater treatment plants produce large quantities of biomass (sludge) that require about one-third of the total investment and plant operation costs for their treatment. With microbial immobilization and coimmobilization with microalgae, it is possible to handle high cell concentration in the column reactor and increase its efficiency. The experimental design consisted in immobilized and coimmobilized S. obliquus with activated sludge in alginate beads cultured under continuous light or photoperiods (12 h/12 h) in artificial wastewater medium to evaluate the growth, nutrients and biochemical oxygen demand (BOD) removal. The results showed that the microalgae S. obliquus immobilized and coimmobilized in cultures under continuous light had higher growth...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Activated sludge; Coimmobilization; Growth; Scenedesmus obliquus; Nitrogen and organic matter removal.
Ano: 2013
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952013000500002

Influences of stocking density and dietary probiotic supplementation on growing Japanese quail performance
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: MAHROSE,KHALID M.; ELHACK,MOHAMED E. ABD; MAHGOUB,SAMIR A.; ATTIA,FATEN A. M.
Abstract: This study investigated the effects of stocking density and dietary supplementation of probiotic (Lactobacillus) on growth, traits of carcass, lymphoid organs and intestinal microbial count of Japanese quail. Quail chicks (one week old) were randomly allotted to 6 groups in a 2×3 factorial experiment included 2 levels of stocking density (100, and 75 cm2/bird) and 3 levels of probiotic (0.00, 0.02 and 0.04 g/kg diet). Quail reared at 100 cm2/ bird showed significantly the highest body weight and daily gain. Quail reared at 75 cm2/ bird had significantly the lower average of feed consumption and the best ratio of feed conversion. Increasing level of probiotic up to 0.04 g/kg led to a significant decrease in dressing percentage by about 2.7 %...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stocking density; Probiotic; Growth; Immunology; Microbial count; Quail.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300603

Morphophysiological and biochemical alterations in Ricinus communis L. seeds submitted to cobalt60 gamma radiation
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: LOPES,AMANDA M.; BOBROWSKI,VERA L.; SILVA,SERGIO D. DOS ANJOS E; DEUNER,SIDNEI.
ABSTRACT This study aimed to evaluate the radiosensitivity of castor bean seeds after applications of different doses of Cobalt60 gamma radiation. Seeds were pre-soaked for 24 hours in distilled water and then irradiated with 50, 100, 150, and 200 Gy, except the control. Sowing was performed in trays, which contained soil as substrate and were maintained in a greenhouse. The electrical conductivity, emergence, emergence speed index, growth parameters and activities of antioxidant enzymes (superoxide dismutase, ascorbate peroxidase, and catalase) were evaluated in the leaves and roots of castor bean seedlings. Gamma radiation did not affect the electrical conductivity of the seeds; however, at a dose of 200 Gy, the emergence and emergence speed index of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Castor bean; Radiosensitivity; Germination; Growth; Antioxidant enzymes.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401925

Life cycle traits of Philodina roseola Ehrenberg, 1830 (Rotifera, Bdelloidea), a model organism for bioassays
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Moreira,Raquel A.; Mansano,Adrislaine S.; Rocha,Odete.
This paper describes experimental results on the life cycle of the rotifer Philodina roseola cultured in the laboratory. Detailed information on life-cycle parameters of a certain species provides a deep understanding and contributes to a better knowledge of the role of the species in the community, besides providing data that are basic to other ecological investigations such as secondary production estimates and knowledge for applications such as its utilization as test-organism in ecotoxicological studies. The average duration of embryonic development of P. roseola was 23.88 h, the age at maturity of primipara was 3.5 days and the maximum lifespan was 23 days. The average size of the rotifer neonate was 198.77 µm, the mean size of primipara was 395.56 µm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rotifer; Embryonary development; Growth; Fecundity; Longevity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200579

Influences of dietary crude protein and stocking density on growth performance and body measurements of ostrich chicks
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: MAHROSE,KHALID M.; EL-HACK,MOHAMED E. ABD; AMER,SHYMAA A.
Abstract: Thirty-six African Black ostrich chicks were used to investigate the effects of dietary crude protein (CP) levels (180, 210 and 240 g/kg), stocking density (4.5 and 3 m2/bird) and their interactions. A factorial arrangement was used to examine the impact of treatments on growth performance and body measurements of ostrich chicks during 2 to 10 weeks of the age. Results indicated that factors studied did not change growth performance traits. The highest value of protein efficiency ratio was observed in ostrich chicks fed diet contained 240 g/kg diet. Birds fed diet contained 240 g CP /kg diet and kept at stocking density of 3 m2 per bird had numerically the highest protein efficiency ratio. Shank girth and tibiotarsus length decreased with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crude Protein; Stocking density; Growth; Body measurements; Ostrich.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100630

Analysis of morpho-agronomic and climatic variables in successive agricultural years provides novel information regarding the phenological cycle of Jatropha in conditions of the Brazilian cerrado
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: DOMICIANO,GISELE P.; ALVES,ALEXANDRE A.; LAVIOLA,BRUNO G.; ALBRECHT,JULIO C.
Phenological studies can provide information that enables the understanding of the dynamics of plants and how these dynamics are related to the biotic and abiotic environment. In order to study the phenological phases of Jatropha during two agricultural years, agronomic and climatic variables, such as temperature and rainfall, were evaluated. Data for each variable in each year and each genotype were subjected to analysis of variance (ANOVA) and the differences were tested at 5% probability by F test. In addition, the correlation of growth behavior and reproductive development of two Jatropha accessions (CNPAE-102 and CNPAE-169) as a function of time elapsed after the start of the phenological cycle with climatic variables were analyzed through Pearson's...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha curcas; Flowering; Growth; Yield.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401985

Contrasting life-histories in two syntopic amphibians of the Leptodactylus fuscus group (Heyer 1978)
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: MARANGONI,FEDERICO; COURTIS,AZUL; PIÑEIRO,JOSE M.; INGARAMO,MARÍA DEL ROSARIO; CAJADE,RODRIGO; STĂNESCU,FLORINA.
Abstract Abstract: We used skeletochronology to compare age, size, reproductive parameters and growth patterns of two related, anuran amphibians from Northern Argentina: Leptodactylus bufonius(n=69) andL. latinasus(n=56), in order to better understand their coexistence in syntopy. Previous studies showed that the two species overlap in their dietary requirements and utilize the same habitats for feeding and breeding. We found that their life-history patterns are significantly different,L. bufoniusbeing larger, and having a higher reproductive output and lifespan, compared to the smaller and shorter-livingL. latinasus. Since none of the species exhibited sexual size dimorphism, and both acquired sexual maturity after the first year of life, we suggest that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Anura; Body size; Growth; Leptodactylus bufonius; Leptodactylus latinansus.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500605

Exogenous enzyme complex prevents intestinal soybean meal-induced enteritis in Mugil liza (Valenciennes, 1836) juvenile.
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: RAMOS,LEONARDO R.V.; PEDROSA,VIRGÍNIA F.; MORI,AGNES; ANDRADE,CARLOS F.F. DE; ROMANO,LUIS A.; ABREU,PAULO C.; TESSER,MARCELO B.
ABSTRACT Four soybean meal-based diets containing increasing levels of an enzyme complex (E50, E100, E150 and E200 at 50, 100, 150 and 200 g ton-1, respectively) and one soybean meal-based diet without the enzyme complex (E0) were fed in triplicate to M. liza juveniles in a semi-static flow system with 20 fish per tank for 75 days. There were no differences between the treatments for animal performance parameters, but fish fed the enzyme complex treatment exhibited significantly (P&lt;0.05) higher values of calcium bone retention compared with control fish. Although there was no relationship between bacterial counts in different sections of the gastrointestinal tract or enzyme levels, filamentous bacteria were increased in E50 compared with E150. All of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbohydrase; Growth; Histology; Microorganisms; Mullet; Phytase.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100341

Growth and hematological responses of tambaqui fed different amounts of cassava (Manihot esculenta)
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Aride,P.H.R.; Oliveira,A.T.; Oliveira,A.M.; Ferreira,M.S.; Baptista,R.B.; Santos,S.M.; Pantoja-Lima,J.
ABSTRACT Tambaqui,Colossoma macropomum is a fish of primary importance in Brazilian aquaculture and in the Amazon region in particular. The aim of this work is to analyze the combined effects of physical training and levels of dietary cassava (Manihot esculenta) on the hematological parameters, food intake, conversion efficiency, growth ratio and swimming performance of this fish. A diet for tambaqui consisting of 30% cassava caused decreases in weight gain and specific growth rate compared with the control group. Diets containing 15% or 45% cassava did not affect these indices and did not cause hematological changes in tambaqui juveniles, indicating that some amount of cassava can be used as an alternative energy source for this important aquaculture...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleosts; Growth; Feed evaluation; Stress; Blood.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000601697

Survival and growth of Pseudoplatystoma corruscans (Pisces - Pimelodidae) larvae: effect of photoperiod
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Campagnolo,R.; Nuñer,A.P.O.
The survival and the growth of Pseudoplatystoma corruscans larvae exposed to four photoperiods: light:dark (LD) 0:24, LD 10:14, LD 14:10, and LD 24:0, in a brackish water (5‰) culture were analyzed. Larvae were fed with Artemia sp. nauplii at a 500 nauplii/larvae/day ratio. Survival on day 5 was inversely related to the length of photoperiod. From days 5 to 10, intermediate photoperiods resulted in a better survival, although LD 0:24 and LD 14:10 resulted in similar survival on day 10. Larvae presented higher weight at intermediate photoperiods. The results suggested that photoperiod requirements shifted during early development of P. corruscans larvae.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Surubim; Pseudoplatystoma corruscans; Larvae; Photoperiod; Survival; Growth.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000600030

Identification of informative performance traits in swine using principal component analysis
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Barbosa,L.; Lopes,P.S.; Regazzi,A.J.; Guimarães,S.E.F.; Torres,R.A.
Using principal component analysis, records of 435 animals from an F2 swine population were used to identity independent and informative variables of economically important performance. The following performance traits were recorded: litter size at birth (BL), litter size at weaning (WL), teat number (TN), birth weight (BW), weight at 21 (W21), 42 (W42), 63 (W63) and 77 (W77) days of age, average daily gain (ADG), feed intake (FI) and feed:gain ratio (FGR) from 77 to 105 days of age. Six principal components expressed variation lower than 0.7 (eigen values lower than 0.7) suggesting that six variables could be discarded with little information loss. The discarded variables present significant simple linear correlation with the retained variables. Retaining...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Swine; Multivariate analysis; Correlation; Discard; Growth; Litter size; Performance.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000600016

Vegetable oil sources in diets for freshwater angelfish (Pterophyllum scalare, Cichlidae): growth and thermal tolerance
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Ikeda,A.K.; Zuanon,J.A.S.; Salaro,A.L.; Freitas,M.B.D.; Pontes,M.D.; Souza,L.S.; Santos,M.V.
The influence of fatty acid composition of the diets on the productive performance and on cold and heat tolerance of juvenile freshwater angelfish (Pterophyllum scalare), in three different phases, was studied. Phase I studied the productive performance of freshwater angelfish in a completely randomized experimental design with four treatments, canola, linseed, olive and soybean oils and four replicates during 50 days using 192 fish in 16 aquaria. Phase II studied the cold tolerance of juvenile freshwater angelfish using 72 juvenile freshwater angelfish, coming from phase I and maintained in 12 aquaria climatized chamber. The temperature was reduced 1ºC per day, until the observation of 100% fish mortality. Phase III, it was studied the heat tolerance of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ornamental fish; Fatty acids; Growth; Survival; Temperature.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000300019

Influence of gender on carcass yield of twin lambs Blackbelly x Pelibuey at 56 days of age
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: García-Osorio,I. del C.; Oliva-Hernández,J.; Osorio-Arce,M.M.; Torres-Hernández,G.; Hinojosa-Cuéllar,J. A.; González-Garduño,R.
ABSTRACT The aim of this study was to determine the influence of gender on pre-weaning growth, yield and weight of primal cuts of the carcass of Blackbelly x Pelibuey lambs. 16 twin lambs were used. The lamb gender was the fixed factor. The variables evaluated were: body weight at birth and at weaning, average daily weight gain, weight and yield of carcass and primal cuts: neck, arm, thorax, abdomen and leg. Gender did not affect (P&gt;0.05) body weight at birth. However, the pre-weaning average daily weight gain and body weight at weaning were affected (P&lt;0.05) by the gender. Hot carcass yield and weight and primal cuts were not affected (P&gt;0.05) by the gender of the lamb. Nevertheless, the area of the Longissimus dorsi muscle and cavity fat were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcass composition; Ewe productivity; Growth; Hair sheep; Humid tropic.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000401077

Nitrogenous metabolism in Thoroughbred and Arabian foals from birth to five months of age
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Piccione,G.; Costa,A.; Fazio,F.; Grasso,F.; Caola,G.
The maturation of nitrogen metabolism was studied in six Thoroughbred and six Arabian foals. Rectal temperature, heart and respiratory rates and serum concentration of several hematochemical parameters (total protein, urea, uric acid, creatinine, and albumine) were monitored from birth to 5 months of age. In both breeds, all the parameters except albumine showed significant differences over time (P&lt;0.05). The two breeds did not differ from each other at any time point. Statistically significant decreases in urea and creatinine concentrations were related to the growth needs of foals during this critical period of development.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Foal; Nitrogenous metabolism; Physiological parameters; Growth.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000400012

Growth and antioxidant response of juvenile oysters Crassostrea sikamea and Crassostrea corteziensis treated with Streptomyces strains
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: García-Bernal,M.; Medina-Marrero,R.; Campa-Córdova,Á.I.; Mazón-Suástegui,J.M.
ABSTRACT The effect of three Streptomyces strains (N7, RL8 and V4) and a mixture of Bacillus (BMix) on the growth (Weight, Size) and superoxide dismutase activity (SOD) in hatchery-reared juvenile oysters Crassostrea corteziensis and Crassostrea sikamea was investigated to determine their probiotic potential. Microorganisms were added to culture water at 1×106 CFU/ml once a day during 30 days and all oysters fed daily a microalgae mix. Juveniles of C. sikamea treated with strains N7, RL8 and V4 had a significant weight gain compared to the control group. C. corteziensis juveniles treated with strains RL8 and BMix showed a significantly higher weight gain than the control group. No significant size increase was observed in any treated group for both oyster...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Actinomycetes; Oyster; Growth; Probiotic effect; SOD activity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000601993

Microanatomical characteristics of marginal ommatidia in three different size-classes of the semi-terrestrial isopod Ligia exotica (Crustacea; Isopoda)
Provedor de dados: Biocell
Autores: Keskinen,Essi; Takaku,Yasuharu; Meyer-Rochow,Benno; Hariyama,Takahiko.
The aims of this paper have been (a) to characterize marginal ommatidia from different eyeregions through a detailed description of their distinct ultrastructural features in three different size-classes ofL. exotica, and (b) to compare microanatomical characteristics of the marginal ommatidia with those of ommatidia of the same eye, but located further centrally. On the basis of transverse as well as longitudinal sections we conclude that new ommatidia are added from a crescentic dorso-anterio-ventral edge of the eye and that maturing ommatidia go through a sequence in which originally the nuclei of cone -, pigment-, and retinula cells are arranged in three separate layers. At the beginning of the microvillar development, the organization of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crustaceans; Eye; Retina; Vision; Growth; Moulting; Ultrastructure.
Ano: 2002
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452002000300006

Optimization of biomass, total carotenoids and astaxanthin production in Haematococcus pluvialis Flotow strain Steptoe (Nevada, USA) under laboratory conditions
Provedor de dados: Biological Research
Autores: CIFUENTES,ANA S; GONZÁLEZ,MARIELA A; VARGAS,SILVIA; HOENEISEN,MARITZA; GONZÁLEZ,NELSON.
The microalga Haematococcus pluvialis Flotow is one of the natural sources of astaxanthin, a pigment widely used in salmon feed. This study was made to discover optimal conditions for biomass and astaxanthin production in H. pluvialis from Steptoe, Nevada (USA), cultured in batch mode. Growth was carried out under autotrophic (with NaNO3, NH4Cl and urea) and mixotrophic conditions (with 4, 8, 12 mM sodium acetate) under two photon flux densities (PFD) (35 and 85 µmol m-2 s-1). The carotenogenesis was induced by 1) addition of NaCl (0.2 and 0.8 %), 2) N-deprivation and 3) high PFD (150 µmol m-2 s-1). Total carotenoids were estimated by spectrophotometry and total astaxanthin by HPLC. Ammonium chloride was the best N-source for growth (k=0.7 div day-1,...
Tipo: Journal article
Palavras-chave: Astaxanthin; Carotenogenesis; Growth; Haematococcus pluvialis.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602003000300006

Statistical studies on anatomical modifications in the radicle and hypocotyl of cotton induced by NaCl
Provedor de dados: Biological Research
Autores: CASENAVE,ESTER C; DEGANO,CLAUDIA AM; TOSELLI,MARIA E; CATAN,ESTELA A.
Salinity affects extensive arid and semiarid areas all over the world, producing diminished yields of many crops. Even though there is a variety of research and reviews related to physiological and anatomical modifications produced in salinity-tolerant species, today there are different points of view in relation to this topic, and especially due to technical limitations, there are few articles in which anatomical modifications have been quantified. The aim of this research is to quantitatively and statistically evaluate the modifications that are produced in radicles and hypocotyles of cotton seedlings growing in NaCl concentrations that affect the early ontogenetic stages of this crop. Germination of two varieties of cotton at increasing concentrations...
Tipo: Journal article
Palavras-chave: Anatomical changes; Cotton; Germination; Growth; Salinity.
Ano: 1999
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97601999000400008

Allometric scaling of biological rhythms in mammals
Provedor de dados: Biological Research
Autores: Günther,Bruno; Morgado,Enrique.
A wide spectrum of cyclic functions in terrestrial mammals of different size, from the 3-gram shrew to the 3-ton elephant, yields an allometric exponent around 0.25, which is correlated _ as a kind of common denominator _ with the specific metabolic rate. Furthermore, the applicability of these empirical findings could be extrapolated to chronological events in the sub-cellular realm. On the other hand, the succession of growth periods (T98%) until sexual maturity is reached also follows the 1/4 power rule. By means of Verhulst's logistic equation, it has been possible to simulate three different biological conditions, which means that by modifying the numerical value of only one parameter, revertible physiological and pathological states can be obtained,...
Tipo: Journal article
Palavras-chave: Growth; Dimensional analysis; Specific metabolic rate; Logistic equation; Homeostasis.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000200010

Population dynamics and reproductive biology ofAchatina fulica Bowdich, 1822 (Mollusca, Gastropoda) in Salvador - Bahia
Provedor de dados: Biota Neotropica
Autores: Silva,Eder Carvalho da; Omena,Elianne Pessoa.
The risks following introduction of invasive species are enormous and incalculable. Achatina fulica is considered one of the 100 species of greatest invasive potential, stands out among the land pulmonate snails, mostly for its high reproductive potential that accelerates the process of dispersion, increasing the damages related to health (disease transmission), to economy (crops destruction) and to environment (biodiversity loss). In order to investigate the relationship of the African snail with the environment, trying to relate sexual activity with climatic variables (temperature, rainfall and humidity), a study was conducted on aspects of population dynamics and reproductive biology in Salvador city. The snails were collected by hand, monthly....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioinvasion; Invasive species; Reproductive cycle; Growth; Giant African snail.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000300115

Life cycle of Scapholeberis armata freyi Dumont &amp;amp; Pensaert, 1983 (Cladocera, Daphnidae)
Provedor de dados: Biota Neotropica
Autores: Castilho,Maria Carolina de Almeida; Wisniewski,Célio; Santos-Wisniewski,Maria José dos.
Knowledge of the life cycle of zooplankton species can provide information for a better understanding of the role of each species in the community and basic data for secondary production investigations. In this study, some life-cycle traits were measured for Scapholeberis armata freyi Dumont &amp;amp; Pensaert, 1983 (Cladocera, Daphnidae), maintained under controlled conditions in laboratory cultures. Experiments were carried out in incubators at a temperature of 23.0 ºC, photoperiod of 12 hours light/dark, and food supply (algal suspension of the chlorophycean Pseudokirchneriela subcapitata at 10(5) cells.mL-1 and mixed suspension of yeast, and fish ration added per organism, at equal proportions) that were kept constant. Observations were made once or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anomopoda; Zooplankton; Longevity; Fecundity; Growth.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000400005

EFECTO DE LA SALINIDAD EN LA SUPERVIVENCIA Y CRECIMIENTO DE CRÍAS DE CABALLITO DE MAR HIPPOCAMPUS REIDI GINSBURG EN CAUTIVERIO
Provedor de dados: Boletín de Investigaciones Marinas y Costeras (INVEMAR)
Autores: Melo-Valencia,Andrés Felipe; Ospina-Salazar,Gloria Helena; Gómez-León,Javier; Cortés-Pineda,Fabián Andrés.
This study was conducted to determine the optimal salinity for the culture of H. reidi fry during the first month of life, evaluating the effect of different salinities (27, 30, 33, and 36) on its growth and survival. The fry were distributed at three ind.L-1 density in 12 L incubators, animals were fed ad libitum throughout the experiment, survival was monitored daily, and height and weight were measured both at the beginning and end of the experiment. The salinity did not show significant differences between treatments, the highest survival rate was obtained at 27 with 17.59 ± 6.99%.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Salinity; Growth; Survival; Hippocampus reidi; Fry.
Ano: 2013
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612013000100013

Growth and extracellular laccase production in liquid cultures of Minimidochium parvum LPSC # 548 Strain
Provedor de dados: Boletín de la Sociedad Argentina de Botánica
Autores: Saparrat,Mario C. N.; Arambarri,Angélica M.; Balatti,Pedro A.
Minimidochium parvum LPSC # 548, a fungus isolated from litter floating on waters of Río Santiago (Provincia de Buenos Aires, Argentina) polluted with industrial effluents and crude-oil, was grown as a shaking culture on a C-limited medium to evaluate its ability to produce extracellular laccase. The effect of anthracene, CuSO4 · 5H2O, ethanol, guaiacol, humic acids, Kraft lignin, MnSO4· H2O, Tween 20 and veratryl alcohol on its growth and extracellular laccase activity levels was also analyzed. The cultures grown on basal medium produced maximum biomass (over 420 mg/100 ml) and maximum extracellular laccase activity (351.7 ±53.3 pkat/ml) after 5 days of incubation. Among the different factors tested, only the humic acids at 0.1 % (w/v) were found to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Laccase; Minimidochium parvum.
Ano: 2007
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722007000100006

Influence of light intensity on growth and physiological characteristics of common sage (Salvia officinalis L.)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Zervoudakis,George; Salahas,George; Kaspiris,George; Konstantopoulou,Eleni.
The aim of this work was to investigate the effects of four different light intensities on the growth characteristics, physiological parameters and leaf photosynthetic pigments of Salvia officinalis L. The plant's dry mass, number of the leaves and physiological parameters indicated a strong positive correlation with the light intensity. On the other hand, the plant's height and leaf photosynthetic pigments were increased at low light treated plants. These results suggest that the aromatic herb Salvia officinalis L. is adaptable to different light environments.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Photosynthetic pigments; Physiological parameters; Salvia officinalis; Solar radiation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000100011

Enhanced solubilization of iron and calcium phosphates by Aspergillus niger by the addition of alcohols
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Barroso,Cinthya Babá; Nahas,Ely.
The present study deals with the effect of increased concentrations of alcohols (methanol and ethanol) on the solubilization of FePO4 and CaHPO4 by Aspergillus niger. The efficiency of solubilization (ES) of inorganic phosphates, fungal growth, acid production and pH variation were determined. The concentrations of alcohols that most favored the solubilization of phosphates were 4% methanol and 3% ethanol. The ES of phosphates by the fungus in media containing methanol ranged from 11-96% and 0.4-87% for ethanol. The stimulation or inhibition of solubilization was dependent on greater or lesser fungus growth, acid production and decreased pH. These responses were supported by the correlation between the amount of phosphate dissolved and fungal growth...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethanol; Methanol; Growth; Acid production; Phosphate solubilization.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200003

Growth of fresh-water prawn Macrobrachium tenellum (Smith, 1871) juveniles fed isoproteic diets substituting fish meal by soya bean meal
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: García-Ulloa Gomez,Manuel; López-Aceves,Luis Alberto; Ponce-Palafox,Jesús Trinidad; Rodríguez-González,Hervey; Arredondo-Figueroa,José Luis.
Growth parameters (standard length, weight, specific growth rate and daily weight gain) of prawn Macrobrachium tenellum juveniles fed 40% crude protein isoproteic diets substituting fish meal with soya bean meal at various levels (20, 40, 60, 80 and 100%) were evaluated for 45 days under laboratory conditions. Experimental diets were compared with a 100% fish meal based diet. Total survival was recorded for all the treatments at the end of the experiment. There were no significant differences (p &gt; 0.05) for all the growth parameters among the dietary treatments. The initial mean weight (0.36 ± 0.10 g) increased almost three times (1.00 ± 0.13 g) after 45 days. The final specific growth fluctuated from 1.82% BW/d for the 60% soya bean meal inclusion...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Fresh water prawn; Macrobrachium tenellum; Isoproteic diets; Soya bean meal; Aquaculture.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100008

Relative growth and sexual maturity of the stone crab Menippe nodifrons Stimpson, 1859 (Brachyura, Xanthoidea) in southeastern Brazil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Bertini,Giovana; Braga,Adriane Araújo; Fransozo,Adilson; Corrêa,Michéle de Oliveira Dias Alves; Freire,Fulvio Aurélio de Morais.
The relative growth and size at onset of morphological sexual maturity of the stone crab Menippe nodifrons were investigated. A total of 399 crabs was captured on Praia Grande and Tenório beaches at Ubatuba. Carapace width (CW) and length, cheliped propodus length and height, abdomen width in females, and gonopod length in males were recorded. In females, the abdominal width showed negative allometry for juveniles and positive allometry for adults; the puberty molt occurred at 31.6 mm CW. In males, the size at onset of morphological sexual maturity was estimated as 29.7 mm CW; the gonopod growth showed positive allometry for juveniles, and an isometric relationship for adults. The gonopod length and the abdominal width were the most appropriate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Sexual Maturity; Menippe; Xanthoidea.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200011

Gladius and statolith as tools for age and growth studies of the squid Loligo plei (Teuthida: Loliginidae) off southern Brazil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Perez,José Angel Alvarez; Aguiar,Daniela Cordella de; Santos,João Antônio Teixeira dos.
Statolith and gladius were investigated for their suitability as tools for age and growth studies in the loliginid squid Loligo plei off southern Brazil. Statoliths when polished, revealed a series of concentric increments deposited around a nucleus. Consistent increment counts covered the squid's entire life-time and could be considered suitable for individual age estimation. Growth increments were observed on the dorsal surface as delimited by consecutive marks formed during low growth periods. Because early growth was masked during chitin deposition, total increment counts underestimated individual age. Gladius growth was highly correlated with somatic growth, and gladius increments could be used to reconstruct individual growth histories. Both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cephalopods; Statolith; Gladius; Age; Loligo plei; Growth.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600009

Growth of the hermit crab Clibanarius vittatus (Bosc, 1802) (Crustacea, Anomura, Diogenidae) at São Vicente, São Paulo, Brazil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Sant’Anna,Bruno Sampaio; Christofoletti,Ronaldo Adriano; Zangrande,Cilene Mariane; Reigada,Alvaro Luis Diogo.
The present study analyzed the growth of males and females of the hermit crab Clibanarius vittatus (Bosc, 1802), at São Vicente, São Paulo, Brazil. Monthly collections were made from May/2001 through April/2003, at the Pescadores Beach in São Vicente. The 2,501 crabs caught were identified and sexed and the carapace shield length (CSL) was measured. For the seasonal growth study, the population was divided into 5mm size classes (CSL) and analyzed by the Bertalanffy method, with the aid of the program Fisat II. The mean sizes of the 703 males and 1,798 females were 8.94±1.80 and 6.61±1.13 mm, respectively. A seasonal growth pattern was observed, with males reaching an asymptotic size (14.92 mm) larger than that of females (13.85 mm). Males began the growth...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Anomura; Clibanarius; Crustacea; Hermit crab.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300014

Ractopamine as a metabolic modifier feed additive for finishing pigs: a review
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Almeida,Vivian Vezzoni de; Nuñez,Amoracyr José Costa; Miyada,Valdomiro Shigueru.
The β-adrenergic agonist ractopamine is increasingly used in the swine industry due to higher consumer demand for leaner pork products. Redirecting nutrients to favor leanness rather than fat deposition, ractopamine improves growth and carcass traits of finishing pigs. However, the impact of this agonist on pork quality is not clearly defined. Understanding the biological effects of dietary ractopamine dose, treatment period, lysine levels, and the lysine to metabolizable energy ratio will help pork producers achieve improvements in animal performance, carcass leanness, and economic efficiency in swine production systems.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Β-adrenergic agonist; Carcass leanness; Growth; Nutrition; Swine.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000300016

Spatial heterogeneity and its influence on Copaifera langsdorffii Desf. (Caesalpiniaceae)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Resende,Júlio Carlos França; Klink,Carlos Augusto; Schiavini,Ivan.
Population dynamics and structure of young individuals of the tree Copaifera langsdorffii Desf. (Caesalpiniaceae) were studied in the gallery forest of the Panga Ecological Station, Uberlândia, MG, Brazil. Three distinct habitats were recognized in this forest, Dike, Middle and Edge zone. Four annual surveys of plant height, diameter at plant base and density were made between 1993 and 1996. The species showed an aggregated distribution in all three habitats. Population structure in all four surveys presented the typical reversed "J" form, characteristic of populations in local regeneration. For the whole population, mortality rates during the four years were constant and low (average of 4.8 % per year), while recruitment declined during the same period...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gallery forest; Seedling; Recruitment; Mortality; Growth; Saplings.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300012

Correlation between the length and weight of Arius maculatus off the southwestern coast of Taiwan
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Chu,Wu-Shan; Hou,Yi-You; Ueng,Yih-Tsong; Wang,Jiang-Ping.
In this study, Arius maculatus were collected using the samples caught by bottom trawling off the southwestern coast of Taiwan. Length-weight and length-length, fork (FL), standard (SL) and total (TL) lengths, relationships were determined. The relationships between the lengths were all significantly linear (p&lt;0.01), the b value in the length-weight relationship for this value was significantly lower than 3 in the fall (p&lt;0.01), when the temporal changes were taken into account, indicating that only the sampling time affected the growth pattern of A. maculatus. The growth was isometric in the spring, summer and winter, but it was negative and allometric in the fall.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arius maculatus; Length-Weight Relationship; Growth; Stand Length (SL).
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000500009

Performance evaluation of CHO-K1 cell in culture medium supplemented with hemolymph
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Raffoul,Tássia; Swiech,Kamilla; Arantes,Mabel Karina; Sousa,Álvaro Paiva Braga de; Mendonça,Ronaldo Zucatelli; Pereira,Carlos Augusto; Suazo,Cláudio Alberto Torres.
The aim of this work was to evaluate the potential of hemolymph utilization as a culture medium supplement to cultivate the animal cell CHO-K1. For this purpose 1% v/v of hemolymph was added to DMEM medium containing 10% v/v of FBS and 1 or 4.5 g/L of glucose. The culture was grown in spinner flasks incubated in a 10% v/v CO2 environment, at 37ºC, with the Cytodex 1 microcarrier. Comparing the results obtained from the culture with hemolymph against those without hemolymph, a positive influence of the hemolymph was observed, as the experiment with hemolymph presented a 52% higher cell concentration and a higher productivity of up to 40%.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal cell; CHO-K1; Microcarrier; Growth; Attachment; Hemolymph.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000400011

Age and growth of Pimelodella pappenheimi (siluriformes, pimelodidae) from an Atlantic Forest Stream in Southern Brazil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Amaral,Marina Faria do; Aranha,José Marcelo Rocha; Menezes,Márcia Santos de.
Studies were performed to determine the growth curves in length and weight for Pimelodella pappenheimi in the "das Pombas" stream, a coastal stream susceptible to the flash flood phenomenon. Samples were collected from September-95 to February-97, monthly, using electric fishing. The fishes were measured in total length and weight. A total of 156 pairs of otholits were taken for ring reading. The Ford-Walford transformation allowed the use of von Bertallanffy expression. The pale ring formation was annual, and it occurred between the summer and the autumn. This species grews in length according to Lt=15.86 (1-e-0.57(t+0.1551) ) equation and in weight according to Wt= 24.23 (1-e-0.57(t+0.1551) )3.12. The increase in length was faster until the second year...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Coastal Stream; Pimelodidae.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000400010

Allelopathic potential of orsellinic acid derivatives
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Peres,Marize Terezinha Lopes Pereira; Mapeli,Ana Maria; Faccenda,Odival; Gomes,Alcir Teixeira; Honda,Neli Kika.
Environmental degradation caused by the excessive use of pesticides has motivated studies aimed at the discovery of new formulations for pest control. The bioassays carried out under laboratory conditions for the present study involved the germination and seedling growth of Lactuca sativa cv. Grand Rapids and Allium cepa cv. Baia Periforme treated with lecanoric acid or one of seven esters obtained from the alcoholysis of the acid. Each substance was tested at concentrations of 10-3, 10-5, 10-7 M, and 10-9 M. The results revealed that, except for lecanoric acid and methyl orsellinate, all other compounds exhibited significant differences in their action when compared with the controls. Also, A. cepa was more sensitive to the compounds assayed, at the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Germination; Growth; Lactuca sativa; Allium cepa; Orsellinates.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400027

Effect of plastic mulch on growth and yield of chilli (Capsicum annuum L.)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Ashrafuzzaman,M; Halim,M. Abdul; Ismail,Mohd Razi; Shahidullah,S.M; Hossain,M. Alamgir.
In this work a field study was conducted to evaluate the effect of coloured plastic mulch on growth and yield of chilli from October 2005 to April 2006. The plastic mulches were transparent, blue, and black and bare soil was the control. Different mulches generated higher soil temperature and soil moisture under mulch over the control. Transparent and blue plastic mulches encouraged weed population which were suppressed under black plastic. Plant height, number of primary branches, stem base diameter, number of leaves and yield were better for the plants on plastic. At the mature green stage, fruits had the highest vitamin-C content on the black plastic. Mulching produced the fruits with the highest chlorophyll-a, chlorophyll-b and total chlorophyll...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annum; Chilli; Growth; Plastic mulch; Yield; Yield attributes.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000200014

Effects of light on the growth and photosynthesis of Egeria najas planchon
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Tavechio,Washington Luiz Gomes; Thomaz,Sidinei Magela.
Photosynthesis and growth of Egeria najas (Hydrocharitaceae) from a subtropical reservoir (Itaipu Reservoir, Brazil-Paraguay) were measured in response to low light intensities (0-124 µM m-2 s-1 PAR) in the laboratory. Photosynthesis approached saturation in the range of light intensities used and light compensation point was reached at ca. 6-22 µM m-2 s-1 PAR, indicating that this species had a low light requirement for growth. Light stimulated shoot and root relative growth rates (RGR) but it was not related to ratios between root:shoot RGR. Laboratory observations indicated that (i) both shoot and root growth were simultaneously stimulated by light and (ii) the low light requirements of E. najas may explain its incidence in the Itaipu Reservoir, where...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egeria najas; Photosynthesis; Growth; Light compensation point; Rooted macrophytes.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200011

Effects of betaine on the growth of the fish piauçu, Leporinus macrocephalus
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Normandes,Edivaldo Bento; Barreto,Rodrigo Egydio; Carvalho,Robson Francisco; Delicio,Helton Carlos.
In this study was tested the effect of betaine on the growth performance of the piauçu fish. For this, twenty-one fish (mean ± SD: body weight: 14.9 ± 1.3 g) were randomly distributed in one out of three experimental treatments (n = 7 each; 1 fish/aquarium): without betaine added in the food (control); 3.6 g betaine/Kg of food; 7.1 g betaine/Kg of food. The fish were exposed to experimental conditions for 60 days. Fish presented significant growth throughout experimentation, but no statistically significant difference was found for any parameter analyzed among the treatments, except for condition factor, which was higher in control group than betaine ones. Accordingly, it was concluded that betaine had no enhancing effect on growth of piauçu.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Betaine; Fish; Feeding behavior.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600010

Photoperiod influence on the cultivation of Steindachneridion scriptum (Pisces, Pimelodidae) juvenile
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Zaniboni-Filho,Evoy; Reynalte-Tataje,David; Nuñer,Alex Pires de Oliveira; Meurer,Samira.
This study aimed to evaluate the influence of photoperiod on juvenile suruvi (Steindachneridion scriptum) in six photoperiods: 24L-0D (L= Light; D= Dark), 18L-6D, 14L-10D, 10L-14D, 6L-18D and 0L-24D. Juveniles measuring 176.8 ± 13.2mm and weighing 60.2 ± 16.0g were distributed in eighteen 150-L aquariums, stocked with 8 juveniles per aquarium. At the end of the study, treatments 24L-0D (105.7 ± 5.8g and 845.9 ±46g) and 0L-24D (93.3 ± 4.9g and 746.4 ± 39.5g) were different (P&lt;0.05) on weight and biomass. Survival (100 ± 0.0%) and length (212.5 ±2.5mm) were the same (P&gt;0.05) in all the treatments. The results showed that suruvi (Steindachneridion scriptum) reached better weight and biomass in extended light periods.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Steindachneridion scriptum; Larviculture; Photoperiod; Growth.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300016

Growth of the annual fish Cynopoecilus melanotaenia (Regan, 1912) based in a temporary water body population in Rio Grande do Sul State, Brazil (Cyprinodontiformes, Rivulidae)
Provedor de dados: Brazilian Journal of Biology
Autores: ARENZON,A.; PERET,A. C.; BOHRER,M. B. C.
The growth of the annual fish Cynopoecilus melanotaenia was studied in its natural environment, in order to obtain information about its biology. A total of 797 specimens of C. melanotaenia were collected on a monthly basis between April 1994 and March 1995 in a temporary water body, located in Rio Grande do Sul State, Brazil. The growth curve in total length suggests, to both sexes, a fast initial growth. Males present a smaller growth rate than females, but they attain a higher average maximum length than the females.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annual fish; Growth; Cynopoecilus melanotaenia; Brazil.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100015

Cantharidin suppressed breast cancer MDA-MB-231 cell growth and migration by inhibiting MAPK signaling pathway
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Gu,X.-D.; Xu,L.-L; Zhao,H.; Gu,J.-Z; Xie,X.-H.
As an active constituent of the beetle Mylabris used in traditional Chinese medicine, cantharidin is a potent and selective inhibitor of protein phosphatase 2A (PP2A) that plays a crucial role in cell cycle progression, apoptosis, and cell fate. The role and possible mechanisms exerted by cantharidin in cell growth and metastasis of breast cancer were investigated in this study. Cantharidin was found to inhibit cell viability and clonogenic potential in a time- and dose-dependent manner. Cell cycle analysis revealed that cell percentage in G2/M phase decreased, whereas cells in S and G1 phases progressively accumulated with the increasing doses of cantharidin treatment. In a xenograft model of breast cancer, cantharidin inhibited tumor growth in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cantharidin; Breast cancer; ERK/MAPK pathway; Growth; Migration; Invasion.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000700608

Clinical and molecuar characterization of Brazilian patients with growth hormone gene deletions
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Arnhold,I.J.P.; Osorio,M.G.F.; Oliveira,S.B.; Estefan,V.; Kamijo,T.; Krishnamani,M.R.S.; Cogan,J.D.; Phillips III,J.A.; Mendonça,B.B.
Genomic DNA from 23 patients with isolated growth hormone (GH) deficiency (12 males and 11 females: heights -4.9 ± 1.4 SDS) was screened for GH gene deletions by restriction endonuclease analysis of polymerase chain reaction amplification products. Three unrelated patients had typical features of severe GH deficiency and deletions (6.7 kb in two and 7.6 kb in one) of the GH gene. The two patients with 6.7-kb deletions developed growth-attenuating anti-GH antibodies whereas the patient with the 7.6-kb deletion continued to grow with GH replacement therapy. Our finding that 3/23 (~13%) Brazilian subjects had GH gene deletions agrees with previous studies of severe isolated GH deficiency subjects in other populations. Two of three subjects (67%) with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Growth hormone; Dwarfism; Gene.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000400003

Malnutrition during lactation as a metabolic imprinting factor inducing the feeding pattern of offspring rats when adults: The role of insulin and leptin
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Moura,A.S.; Franco de Sá,C.C.N.; Cruz,H.G.; Costa,C.L.
The aim of the present study was to determine the impact of malnutrition during early postnatal life and the feeding pattern of rat offspring when adults (2 months and 1 year old). In comparison with rats normally fed during lactation, we observed that adult offspring displayed a faster process of feeding reduction when a protein-free diet was offered. In addition, we studied the concentration of insulin and leptin in the lactating pups (10 days) and when these offspring became adult after the onset of a new feeding pattern induced by the protein-free diet. When the diet was changed at 60 days, the offspring malnourished during lactation displayed, after 3 days, a food intake reduction around 41.4 vs 14.2% of the control group. At 10 days of life, plasma...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrition; Growth; Insulin; Leptin.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000500016

Nitrogenase activity of Beijerinckia derxii is preserved under adverse conditions for its growth
Provedor de dados: Brazilian Journal of Microbiology
Autores: Barbosa,Heloiza R.; Moretti,Marcos A.; Thuler,Daniela S.; Augusto,Elisabeth F.P.
In order to evaluate the response of Beijerinckia derxii ICB-10 to different environmental factors, growth curves and specific nitrogenase activity were studied. Tested conditions were as follows: a) media with different pH values (2.5, 2.8, 4.2 and 5.7); b) medium supplemented with 230 µM aluminium sulphate; c) media with two different potassium phosphate concentrations (50 mM and 100 mM); d) shaken or still cultures; e) medium supplemented with 40 mM sodium thiosulphate. Growth curves and specific nitrogenase activity at pH 4.2 were closely similar to those for cultures at pH 5.7 (standard condition), whereas no growth occurred at pH 2.5. Changes in growth curves and/or specific nitrogenase activity were observed under the following conditions: I) pH 2.8...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beijerinckia; Nitrogenase; Nitrogen fixation; Growth; Environmental factors.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000300007

Influence of glyphosate in planktonic and biofilm growth of Pseudomonas aeruginosa
Provedor de dados: Brazilian Journal of Microbiology
Autores: Lima,Ilana Schneider; Baumeier,Nicole Carmo; Rosa,Rosimeire Takaki; Campelo,Patrícia Maria Stuelp; Rosa,Edvaldo Antonio Ribeiro.
This study evaluated the impact of different concentrations of glyphosate (Rondup®) on planktonic and biofilm growth of P. aeruginosa. Aerobic and anaerobic cultures of P. aeruginosa ATCC®15442 inoculated in MHB + glyphosate (0.845 ppm, 1.690 ppm, 8.45 ppm, 16.90 ppm, 84.50 ppm, 169 ppm, 845 ppm, and 1690 ppm) and cultured in normoxia and anoxia, following their OD560nm every hour for 24 h. Biofilms of adapted cells were formed in the presence of glyphosate (0.845 to 1690 ppm) in normoxia and anoxia for 36 h. Glyphosate at concentrations higher than 84.5 ppm reduces the cell density of planktonic aerobic cultures (p &lt; 0.05). However, these same concentrations favor the planktonic anaerobic growth (p &lt; 0.05). On the other hand, the herbicide favors a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pseudomonas aeruginosa; Glyphosate; Growth; Biofilm.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300029

Impact of water potential on growth and germination of Fusarium solani soilborne pathogen of peanut
Provedor de dados: Brazilian Journal of Microbiology
Autores: Palacios,Sofia; Casasnovas,Francisco; Ramirez,María L.; Reynoso,María. M.; Torres,Adriana M.
Studies were conducted to determine the effect of osmotic and matric stress on germination and growth of two Fusarium solani strains, the etiological agent responsible of peanut brown root rot. Both strains had similar osmotic and matric potential ranges that allowed growth, being the latter one narrower. F. solani showed the ability to grow down to -14 MPa at 25 °C in non-ionic modified osmotic medium, while under matric stress this was limited to -8.4 MPa at 25 °C. However, both strains were seen to respond differently to decreasing osmotic and matric potentials, during early stages of germination. One strain (RC 338) showed to be more sensitive to matric than osmotic (non ionic) and the other one (RC 386) showed to be more sensitive to osmotic than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium solani; Germination; Growth; Matric potential; Osmotic potential; Peanut brown root rot; Soilborne pathogen.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300046

Effect of ultrasound on survival and growth of Escherichia coli in cactus pear juice during storage
Provedor de dados: Brazilian Journal of Microbiology
Autores: Cruz-Cansino,Nelly del Socorro; Reyes-Hernández,Isidro; Delgado-Olivares,Luis; Jaramillo-Bustos,Diana Pamela; Ariza-Ortega,José Alberto; Ramírez-Moreno,Esther.
Abstract The aim of this study was to investigate the effectiveness of ultrasound as a conservation method for the inactivation of Escherichia coli inoculated into cactus pear juices (green and purple). Total soluble solids, pH, titratable acidity, and the kinetics of E. coli in cactus pear juices treated by ultrasound (60%, 70%, 80% and 90% amplitude levels for 1, 3 and 5 min) were evaluated over 5 days. Total inactivation was observed in both fruit juices after 5 min of ultrasound treatment at most amplitude levels (with the exception of 60% and 80%). After one and two days of storage, the recovery of bacteria counts was observed in all cactus pear juices. Ultrasound treatment at 90% amplitude for 5 min resulted in non-detectable levels of E. coli in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ultrasound; Growth; Escherichia coli; Cactus pear juice; Storage.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000200431

Behaviour of L. monocytogenes in sliced, vacuum-packed mortadella
Provedor de dados: Brazilian Journal of Microbiology
Autores: Bersot,Luciano dos Santos; Gillio,Cíntia; Tavolaro,Paula; Landgraf,Mariza; Franco,Bernadette Dora Gombossy de Melo; Destro,Maria Teresa.
This study evaluated the growth of naturally occurring L. monocytogenes in sliced, vacuum-packed mortadella samples during storage at 5ºC until the expiration date. Tukey's test indicated that counts of L. monocytogenes on 0, 10, 20, 30 and 40 days of storage were significantly different (p&lt;0.05), indicating growth during shelf life. In three trials, the mean increase was 1.72 log cycles. Vacuum packing and storage under refrigeration were not effective in controlling the growth of L. monocytogenes in sliced mortadella, indicating that good manufacturing practices and implemented HACCP programs are essential to assure safety of this product.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Listeria monocytogenes; Growth; Sliced mortadella; Vacuum-packing.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300020

Comparative growth of trichoderma strains in different nutritional sources, using bioscreen c automated system
Provedor de dados: Brazilian Journal of Microbiology
Autores: Rossi-Rodrigues,Bianca Caroline; Brochetto-Braga,Márcia Regina; Tauk-Tornisielo,Sâmia Maria; Carmona,Eleonora Cano; Arruda,Valeska Marques; Chaud Netto,José.
Trichoderma is one of the fungi genera that produce important metabolites for industry. The growth of these organisms is a consequence of the nutritional sources used as also of the physical conditions employed to cultivate them. In this work, the automated Bioscreen C system was used to evaluate the influence of different nutritional sources on the growth of Trichoderma strains (T. hamatum, T. harzianum, T. viride, and T. longibrachiatum) isolated from the soil in the Juréia-Itatins Ecological Station (JIES), São Paulo State - Brazil.The cultures were grown in liquid culture media containing different carbon- (2%; w/v) and nitrogen (1%; w/v) sources at 28ºC, pH 6.5, and agitated at 150 rpm for 72 h. The results showed, as expected, that glucose is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioscreen C system; Growth; Trichoderma; Tryptone; Yeast extract.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000200035

Growth of enterotoxin producing Bacillus cereus in meat substrate at 10ºC and 30ºC
Provedor de dados: Brazilian Journal of Microbiology
Autores: Soares,Celina Mara; Kabuki,Dirce Yorika; Kuaye,Arnaldo Yoshiteru.
The behaviour of enterotoxin-producing Bacillus cereus in meat was investigated by inoculating spore suspensions of five cultures into meat substrate (pH 5.8) and incubating at 10ºC and 30ºC. The bacterial populations were evaluated after different times by plate counts in nutrient agar. All the cultures presented growth at 30ºC with the generation time varying from 28.8 to 36.0 minutes. Three cultures also presented growth at 10ºC with generation times between 10.16 and 28.38 h. Considering the results, it was concluded that meat kept at abusive temperatures would be subject to development of this microorganism.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacillus cereus; Meat; Growth.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400022

Influence of chromium in Laguncularia racemosa (L). Gaertn f. physiology
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Rocha,Andréa C.; Canal,Emerson C.; Campostrini,Eliemar; Reis,Fabrício O.; Cuzzuol,Geraldo Rogério F.
Most studies of chromium have been realized in the sediments and in mangrove trees. However, little is known about its effect on growth and metabolism in this vegetation. L. racemosa plants were grown in solution with 20% of ionic strength of Hoagland and Arnon containing 100 mM NaCl and supplemented with 0.00, 0.05 and 0.50 mg L-1 of Cr+3. The growth, the pigments and gas exchange measurements showed no changes in response to doses of chromium. After 30 days the initiation of treatments, plants of L. racemosa had average 0.559 g of total dry weight, 1.34 mg L-1 of total chlorophyll and 7.9 µmol m-2 s-1 of A (CO2 photosynthetic assimilation). The photochemical potential efficiency was affected by the intermediate dose of 0.05 mg L-1 of Cr+3 (Fv/Fm=0.73)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbohydrates; Fluorescence; Gas exchange; Growth; Heavy metal; Mangrove.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000200001

Physiological responses of NaCl stressed cowpea plants grown in nutrient solution supplemented with CaCl2
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Silva,José Vieira; Lacerda,Claudivan Feitosa de; Costa,Paulo Henrique Alves da; Enéas Filho,Joaquim; Gomes Filho,Enéas; Prisco,José Tarquínio.
Pitiuba cowpea (Vigna unguiculata (L.) Walp.) plants were grown in nutrient solution and kept in a greenhouse up to pre-flowering stage. They were subjected to four different treatments: nutrient solution; nutrient solution containing 75 mmol.L-1 NaCl; nutrient solution containing 75 mmol.L-1 NaCl and 5 mmol.L-1 CaCl2; and nutrient solution containing 75 mmol.L-1 NaCl and 10 mmol.L-1 CaCl2. Salt stress strongly inhibited plant growth, caused a disturbance in plant-water balance, and increased the total content of inorganic solutes in the different plant parts, due mainly to accumulation of Na+ and Cl-. It also increased leaf and root soluble carbohydrates, reduced soluble amino nitrogen both in root tips and in the youngest trifoliate leaves, and reduced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Growth; Salt stress; Solutes accumulation; Vigna unguiculata; Water relations.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000200005

Partitioning of nitrate reductase activity in Coffea arabica L. and its relation to carbon assimilation under different irradiance regimes
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Carelli,Maria Luiza C.; Fahl,Joel I.
The distribution of in vivo nitrate reductase (EC 1.6.6.1) activity (NRA) between leaves and roots was studied in young coffee plants (Coffea arabica L.) grown in pots with watered sand in a glasshouse and irrigated with nutrient solution. The influence of irradiance regimes on the partitioning of NRA, and its relation with CO2 assimilation, was also evaluated in plants grown under approximately 20, 50 and 100% of full sunlight. Time-course of nitrate accumulation in nitrogen-starved plants showed a similar pattern in leaves and roots after supplying 15 mmol L-1 nitrate, indicating efficient ability of the roots to export nitrate to the shoot. At the same time, NRA was rapidly induced in both tissues. In shoots, NRA partitioning was synchronized among the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffee; Growth; Leaf/root ratio; Nitrate assimilation; Photosynthesis; Shading.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000300006

Physiological response of oil palm interspecific hybrids (Elaeis oleifera H.B.K. Cortes versus Elaeis guineensis Jacq.) to water deficit
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Méndez,Yurany Dayanna Rivera; Chacón,Leonardo Moreno; Bayona,Cristihian Jarry; Romero,Hernán Mauricio.
Water supply is the main yield-limiting abiotic factor of oil palm in Colombia. To determine the effect of water deficit on the physiology of oil palm and to assess the tolerance degree to this condition, interspecific Elaeis oleifera versus Elaeis guineensis 'U1273', 'U1859', 'U1914', and 'U1937' hybrids were planted for 60 days in soil with different water potentials (-0.042, -0.5, -1.0, and -2.0 MPa) in a complete randomized factorial design with three replications. The water potential, osmotic adjustment molecules (total and reducing sugar content), gas exchange (photosynthesis rate, stomatal conductance, water use efficiency, and leaf respiration), and vegetative growth (height, bulb diameter, leaf area, number of leaves, total dry matter, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecophysiology; Growth; Stress; Tolerance; Water potential.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000400006

Physiological characteristics of cassava tolerance to prolonged drought in the tropics: implications for breeding cultivars adapted to seasonally dry and semiarid environments
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: El-Sharkawy,Mabrouk A.
The paper summarizes research conducted at International Center for Tropical Agriculture (CIAT) on responses of cassava to extended water shortages in the field aided by modern gas-exchange and water-relation techniques as well as biochemical assays. The aim of the research was to coordinate basic and applied aspects of crop physiology into a breeding strategy with a multidisciplinary approach. Several physiological characteristics/traits and mechanisms underpinning tolerance of cassava to drought were elucidated using a large number of genotypes from the CIAT core germplasm collection grown in various locations representing ecozones where cassava is cultivated. Most notable among these characteristics are the high photosynthetic capacity of cassava leaves...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agriculture; Breeding; Canopy; Carboxylation enzymes; C3-C4 intermediate; Ecophysiology; Growth; Leaf photosynthesis; Manihot sp.; PEP carboxylase; Productivity; Stomata; Water stress; Yield.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400003

Light as an indicator of ecological succession in brazilwood (Caesalpinia echinata Lam.)
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Mengarda,Liana H. G.; Souza,Rogério L. F. de; Campostrini,Eliemar; Reis,Fabrício O.; Vendrame,Wagner A.; Cuzzuol,Geraldo R. F.
The ecophysiological behavior of brazilwood (Caesalpinia echinata Lam.) plants was evaluated as affected by light quantity and quality. Nine-month-old plants were cultivated under 0%, 50%, and 80% artificial shading, and natural shading imposed by a closed canopy for a period of 392 days. At the end of that period growth parameters were measured, including relative growth rate (RGR), net assimilation rate (NAR), leaf area ratio (LAR), specific leaf mass (SLM) and root:shoot ratio (R:S). Higher leaf area, dry mass and RGR were obtained under 50% artificial shade. Under full sunlight (0% shade), growth was satisfactory showing higher R:S and SLM. Growth was inhibited under 80% artificial and natural shading indicating that C. echinata is not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlorophyll fluorescence; Gas exchange; Growth; Light stress; Shade; Tropical tree.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000100007

Physiological and oxidative stress responses of four potato clones to aluminum in nutrient solution
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Tabaldi,Luciane A.; Nicoloso,Fernando T.; Castro,Gabriel Y.; Cargnelutti,Denise; Gonçalves,Jamile F.; Rauber,Renata; Skrebsky,Etiane C.; Schetinger,Maria R.C.; Morsch,Vera M.; Bisognin,Dilson A.
Aluminum toxicity is a serious problem in Brazilian soils and selecting potato clones is an important strategy to produce this crop on these kinds of soils. Potato clones, Macaca, SMIC148-A, Dakota Rose, and Solanum microdontum, were grown in a nutrient solution (pH 4.0) with 0, 50, 100, 150 and 200 mg Al L-1. After 7 d, Al concentration in both root system and shoot of all clones increased linearly with increasing Al levels. Based on relative root growth, S. microdontum and SMIC148-A were considered Al-tolerant clones, whereas Macaca and Dakota Rose were considered Al-sensitive. Shoot growth in Macaca linearly decreased with increasing Al levels. Root H2O2 concentration in both Al-sensitive clones increased with increasing Al supply, whereas in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aluminum toxicity; Antioxidative enzymes; Growth; Oxidative stress; Solanum tuberosum.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000300005

Chlorophyll a fluorescence as indicative of the salt stress on Brassica napus L.
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Bacarin,Marcos Antonio; Deuner,Sidnei; Silva,Fabio Sergio Paulino da; Cassol,Daniela; Silva,Diolina Moura.
The effects of salinity stress on chlorophyll fluorescence and the growth of Brassica napus L were investigated. The chlorophyll a fluorescence transient were recorded and analyzed according to the JIP-test which can quantify PSII performance. Salt stress resulted in decreased leaf area and dry matter compared with the control treatment (0 mM NaCl). The most pronounced effects of salt stress were observed with 200 mM NaCl, and the hybrids displayed different levels of sensitivity to stress. The Performance Index (PI ABS) was the most sensitive parameter to salt stress, which suggests that this parameter can be used to screen genotypes for salt tolerance.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Canola; Growth; JIP-Test/salt stress; Spring rapessed oil.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000400001

Growth and photosynthetic responses of Picea asperata seedlings to enhanced ultraviolet-B and to nitrogen supply
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Yao,Xiaoqin; Liu,Qing; Han,Chao.
Ultraviolet-B (UV-B) radiation and nitrogen are expected to increase simultaneously with future changes in global climate. In this study, growth and photosynthetic responses of Picea asperata seedlings to enhanced UV-B and to nitrogen supply were studied. The experimental design included two levels of UV-B treatments (ambient UV-B, 11.02 kJ m-2 d-1; enhanced UV-B, 14.33 kJ m-2 d-1) and two nitrogen levels (0; 20 g N m-2) to determine whether nitrogen can alleviate the negative impacts of enhanced UV-B on seedling growth and photosynthesis. Enhanced UV-B significantly inhibited plant growth and impaired net photosynthetic rate, stomatal conductance, transpiration rate, the light-saturated assimilation rate, assimilation capacity, light compensation point,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Gas exchange; Nitrogen; Picea asperata; Photosynthesis; UV-B.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000100002

Photoacclimation in three species of freshwater red algae
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Bautista,Anna I.N.; Necchi Jr.,Orlando.
Three freshwater Rhodophyta species (Audouinella eugenea, A. hermannii and Compsopogon coeruleus) were tested as to their responses (photosynthesis, growth and pigment concentration) to two irradiances (low light, LL, 65 µmol m-2 s-1 and high light, HL, 300 µmol m-2 s-1) and two periods (short time, ST, 4 d, and long time, LT, 28 d). Higher growth rates were consistently observed at LL but significant differences were observed only for A. hermannii. Higher values of photoinhibition at LL were found for the three species, which is consistent with the dynamic photoinhibition as a reversible photoprotective mechanism against high irradiance. Light-induced decreases of effective quantum yield (EQY) were observed in the three species consisting of pronounced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlorophyll fluorescence; Growth; Irradiance; Photosynthesis; Pigment; Red algae.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000100003

Optimizing exponential growth of Triticum aestivum by application of the relative addition rate (RAR) technique utilizing a computer-controlled nutrient delivery system
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Pintro,José Carlos; Taylor,Gregory James; Matumoto-Pintro,Paula Toshimi.
We conducted experiments designed to assess whether plants can be grown under conditions of low ionic strength simulating natural soil conditions. Wheat (Triticum aestivum, cv. Atlas 66) plants were grown using ten different relative nutrient addition rates (RAR) of nutrients (0.00, 0.06, 0.09, 0.12, 0.15, 0.18, 0.21, 0.24, 0.27, and 0.30 day-1) with a background solution containing 50 µmol.L-1 N and all other essential nutrients in optimal proportions relative to N. The relative growth rate (RGR) of plants over a 19-day experimental period responded directly to RAR (from 0.06 to 0.21 day-1) with a linear slope of 0.56 and an intercept of 0.085 day-1. Solution electrical conductivity (EC) values remained relatively stable over the experimental period. We...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Ionic strength; Nutrient solution; Wheat.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000300006

Changes in growth and superoxide dismutase activity in Hydrilla verticillata L. under abiotic stress
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Panda,Sanjib Kumar; Khan,Mohammad Hussain.
A study was made of the role of various heavy metals (chromium, zinc, copper and cadmium) together with the effects of NaCl-salinity, PEG-mediated water stress and temperature on growth and superoxide dismutase (SOD) activity in hydrilla (Hydrilla verticillata L.). Almost all metals studied reduced growth but presented a modulatory effect at lower concentrations. NaCl-salinity, water stress and temperature treatments also reduced growth. SOD activity was inhibited by both chromium and zinc but increased by copper and cadmium. NaCl-salinity increased SOD activity while water stress decreased it. SOD showed thermostability with a higher activity being recorded at 45ºC.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Heavy metals; NaCl; PEG; Superoxide dismutase; Temperature.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000200007

Apoplasm hydrostatic pressure on growth of cylindrical cells
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Pessoa,José Dalton Cruz; Calbo,Adonai Gimenes.
According to the model frequently used as reference, plant cell growth occurs only when turgor surpasses a threshold. This model was proposed considering a cylindrical cell of constant wall thickness immerged in a water solution, with viscoelastic behaviour, hydraulic conductivity, variable extensibility, and unidirectional elongation. The author, Lockhart (1965), did not consider the effects of apoplasm hydrostatic potential, a subject treated later by Calbo and Pessoa (1994) who argued that this component of cell potential would interfere with cell growth rate. To evaluate this effect, where possible the same deductive procedures as those employed by Lockhart were used here, which resulted in a set of equivalent equations for cell growth, turgor and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apoplasm; Cell wall; Growth; Lockhart; Model; Plant.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000100003

Effect of Vermicompost and Compost on Lettuce Production
Provedor de dados: Chilean Journal of Agricultural Research
Autores: Hernández,Adriana; Castillo,Hugo; Ojeda,Dámaris; Arras,Ana; López,Julio; Sánchez,Esteban.
A greenhouse study was conducted to evaluate the effect on total growth and leaf nutritional content in lettuce (Lactuca sativa L.) in the Agrotechnology Sciences Department of the Universidad Autonoma de Chihuahua, Mexico in 2007. Three types of fertilization treatments were analyzed: two organic and one conventional or inorganic. Both vermicompost and compost were produced from cattle manure in a 25-wk process. The study included 12 experimental units made up of lettuce plantlets var. Great Lakes. A linear model was fitted for statistical analysis using a completely randomized experimental design. ANOVA was performed and means were compared by orthogonal contrasts. Results showed differences in weight and leaf content for the N and K variables, and the...
Tipo: Journal article
Palavras-chave: Fertilization; Nutrient; Growth; Quality.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000400008

Effect of rainfall regimes on seed production and quality of Avena barbata
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Olivares,Alfredo; Johnston,Myrna; Calderón,Carolina.
The effects of rainfall amount and distribution on seed yield and quality in Avena barbata were evaluated in a greenhouse under controlled conditions with simulated rainfall regimes. A randomized complete-block design was used with five replications of one pot each. Seven treatments were established according to rainfall regimes for a real year in the semiarid zone in the Metropolitan Región, Chile: normal rainfall (1982), late rainfall (1987), normal-early rainfall (1962), normal-late rainfall (1989), dry-early rainfall (1981) and dry-late rainfall (1990). One treatment without water stress was left for comparison. One-year-old seeds were planted in pots with disinfected soil. The five most uniform plants in terms of size and health were chosen for the...
Tipo: Journal article
Palavras-chave: Avena; Development; Growth; Seeds; Water stress.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100006

Effects of the foliar application of methanol on the yield and growth of rice (Oryza sativa cv. Shiroudi)
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Abbasian,Abouzar; Mirshekari,Bahram; Safarzade Vishekaei,Mohammad N; Rashidi,Varahram; Aminpanah,Hashem.
Effects of the foliar application of methanol on the yield and growth of rice (Oryza sativa cv. Shiroudi). Cien. Inv. Agr. 43(1):17-24. Approximately two decades have passed since it was reported that the foliar application of methanol increased plant biomass and yield. Many subsequent reports have been published concerning the ability or inability to reproduce these initial observations. To evaluate the effect of methanol on rice (Oryza sativa cv. Shiroudi) yield and rice components, a field experiment was conducted at the Tonekabon Rice Research Station in Iran in 2012 and 2013. The experiment had a randomized complete block design (RCBD) with three replicates. The plants were treated with aqueous methanol solutions (0, 6, 12, 18, and 24% (v/v))....
Tipo: Journal article
Palavras-chave: Aqueous methanol solution; Correlation; Glycine; Grain yield; Growth; Rice; Tween 80 as a surfactant.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000100002

Early individual growth of Eucryphia cordifolia and Laurelia sempervirens planted under different competition conditions in south-central Chile
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Uteau,Daniel; Donoso,Pablo J.
Few studies have focused on forest research in plantations with Chilean native species midtolerant to shade. Such species may use resources that intolerant species cannot, increasing the total site productivity. This study aimed to define the factors that explain the growth of Euctyphia cordifolia Cav. and Laurelia sempervirens (Ruiz et Pavón) Tul., two midtolerant species of southern Chile. We sought to determine the effect on these species of competition in mixed-species plantations. At the time of this study, the plantations were 4 to 22 years old . Two competition indices were analyzed for each species: the Growing Space Polygon (GSP) and the Canopy Overlap (CO). The GSP proved to be very useful in predicting the growth in the older plantations where...
Tipo: Journal article
Palavras-chave: Competitionindex; Forest; Growth; Growing space polygon; Crown competition; Midtolerant species; Silviculture.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100008

Low water hardness and pH affect growth and survival of silver catfish juveniles
Provedor de dados: Ciência Rural
Autores: Copatti,Carlos Eduardo; Garcia,Luciano de Oliveira; Kochhann,Daiani; Cunha,Mauro Alves da; Becker,Alexssandro Geferson; Baldisserotto,Bernardo.
The objective of this study was to investigate the effects of exposure to low water hardness (0, 25 and 50mg CaCO3L-1) into the 6.0-8.0 pH range to silver catfish juveniles (Rhamdia quelen) survival and growth after 32 days. Juveniles kept at zero water hardness presented higher mortality at pH 7.0 and 8.0 than those submitted to other treatments. Weight of juveniles exposed to pH 6.0 and zero water hardness was significantly higher than those kept at the same water hardness and other pH. Survival and growth of juveniles exposed to 25 and 50mg CaCO3 L-1 was not affected in the 6.0-8.0 pH range. Therefore, the best water hardness for silver catfish juveniles growth is 25-50mg CaCO3 L-1 and at low water hardness (next zero) pH must be reduced.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acidic water; Alkaline water; Calcium; Growth; Mortality; Rhamdia quelen.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000800030

A mathematical model for growth in weight of silver catfish (Rhamdia quelen) (Heptapteridae, Siluriformes, Teleostei)
Provedor de dados: Ciência Rural
Autores: Benaduce,Ana Paula da Silva; Rodrigues,Luiz Alberto Díaz; Mistro,Diomar Cristina; Baldisserotto,Bernardo.
The use of a mathematical model applied to biological science helps to predict the specific data. Based on biological data (weight and age) of silver catfish, Rhamdia quelen, a mathematical model was elaborated based on a nonlinear difference equation to demonstrate the relationship between age and growth in weight. Silver catfish growth was described following the Beverton-Holt model Pt+1 = (r Pt) / (1+ a Pt ), where r &gt; 0 is the maximum growth rate and a &gt; 0 is a constant of growth inhibition. The solution of this equation is Pt= 1 /{[1/P0 - a / (r-1)] 1/r t + a/ (r-1)}, were P0 is the initial weight of the fish. Through this model it was observed that the female reaches the theoretical maximum weight approximately at the age of 18 years and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nonlinear difference equation; Teleost; Weight-at-age; Growth.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782006000500042

Antioxidant activity of corn seeds after thermal stress
Provedor de dados: Ciência Rural
Autores: Marini,Patrícia; Bandeira,Juliana de Magalhães; Borba,Isabel Cristina Gouvea de; Martins,Andrea Bicca Noguez; Moraes,Dario Munt de; Amarante,Luciano do; Villela,Francisco Amaral.
The aim of this research was to analyze the effect of different temperatures on physiological quality and relate the responses with the antioxidant activity of three lots of corn seeds. The seeds from three lots were exposed for 24h at temperatures of 15, 25, 35 and 40°C and then evaluated for percentage, speed index and first germination count, as well as early growth and activity of antioxidant enzymes in the seedlings. The experimental design was completely randomized with four replications, with subsequent polynomial regression analysis. The results showed that the seeds from the three lots of corn exposed to temperatures of 15 and 40°C, were of better high physiological quality (vigor), which explains the low activity of enzymes of the antioxidant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Temperature; Germination; Growth.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000600002

Diversification strategies in the pesticide industry: from seeds to biopesticides
Provedor de dados: Ciência Rural
Autores: Pelaez,Victor; Mizukawa,Gabriel.
ABSTRACT: The pesticide industry has undergone a diversification process led by six leading companies (Monsanto, Syngenta, Bayer, Dow, DuPont, BASF) that control roughly 68% of the world market. This growth, initiated in the second half of the 1990s, occurred through deals and acquisitions of companies from the seed and biopesticide markets. This paper analyzes these diversification strategies, which have involved a capital mobilization process based on the exploitation of economies of scope and management of complementary assets. This aims to minimize the risks of investment in consolidated markets as well as in new ones.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pesticides; Seeds; Biopesticides; Diversification; Growth.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000200152

Allometric growth of non-carcass components in crossed lambs
Provedor de dados: Ciência Rural
Autores: Garcia,Iraides Ferreira Furusho; Alvarenga,Tharcilla Isabella Rodrigues Costa; Perez,Juan Ramon Olalquiaga; Almeida,Amelia Katiane de; Gallo,Sarita Bonagurio; Pereira,Idalmo Garcia; Alves,Nadja Gomes; Alvarenga,Flávio Augusto Pereira.
Males and females, including purebred Santa Inês lamb (SI) and crosses between Santa Inês dams and Texel (TxSI), Ile de France (IFxSI) and Bergamasca (BxSI) sires were feedlot finished and slaughtered at 15, 25, 35 and 45kg live weight. After slaughter, the following non- carcass components were weighed and calculated the allometric growth. Lungs of BxSI males grew faster than those of SI and TxSI. Trachea/esophagus in SI and TxSI males grew slower than IFxSI and BxSI. Kidneys BxSI males grew faster than TxSI and IFxSI. Livers of female TxSI lamb grew more rapidly than those of females in the other genetic groups. In both males and females, the rumen/reticulum grew faster in the TxSI group than SI and BxSI groups.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Growth; Crossbreed; Body development; Sheep.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000701229

Dendrometric evaluation of a clonal population of Tectona grandis in forest-livestock system
Provedor de dados: Ciência Rural
Autores: Maria,Luciano de Souza; Litter,Felipe Adolfo; Carneiro,Márcia de Almeida; Silva,Fabrícia Rodrigues da; Garcia,Marcos Leandro; Carvalho,Marco Antonio Camillo de.
ABSTRACT:  Production of Tectona grandis (teak) in integrated systems with livestock or agriculture demonstrates high potential of financial return. However, studies on the development of teak are still scarce, especially in the northern region state of Mato Grosso. In this study we sought to evaluate dendometric variables of a clonal population of teak in a forest-livestock integration system (LFIS), during a period of 53 months in the city of Alta Floresta, Mato Grosso, Brazil. For this purpose, three installments were samples, a total of 360 individuals, and for each the diameter was measured at 1.3 meters from the base so as to calculate the total volume, the current annual increment (CAI) and mean annual increment (MAI), and five adjusted regression...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Model; LFIS; Teak.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000900301

A generalized nonlinear tempeature response function for some growth and developmental parameters in kiwifruit (Actinidia deliciosa (A. Chev.) C. F. Liang &amp;amp; A. R. Ferguson)
Provedor de dados: Ciência Rural
Autores: Streck,Nereu Augusto.
Temperature is a major factor that affects metabolic processes in living organisms. Thermal time has been widely used to account for the effects of temperature on crop growth and development. However, the thermal time approach has been criticized because it assumes a linear relationship between the rate of crop growth or development and temperature. The response of the rate of crop growth and development to temperature is nonlinear. The objective of this study was to develop a generalized nonlinear temperature response function for some growth and developmental parameters in kiwifruit (Actinidia deliciosa (A. Chev.) C. F. Liang &amp;amp; A. R. Ferguson). The nonlinear function has three coefficients (the cardinal temperatures), which were 0ºC, 25ºC, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Temperature; Model; Growth; Development; Kiwifruit.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782003000200012

The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status
Provedor de dados: Ciência Rural
Autores: Cechin,Inês; Gonzalez,Gisely Cristina; Corniani,Natália; Fumis,Terezinha de Fátima.
ABSTRACT: Interaction effects between nitrogen and UV-B radiation were studied in sunflower (Helianthus annuus L. variety IAC-Iarama) plants grown in a greenhouse under natural photoperiod conditions. Plants were irradiated with 0.8W m-2 (control) or 8.0W m-2 (+UV-B) of UV-B radiation for 7h per day. The plants were grown in pots containing vermiculite and watered with 70% of full strength nitrogen-free Long Ashton solution, containing either low (42.3ppm) or high (282ppm) nitrogen as ammonium nitrate. High nitrogen increased dry matter of stem, leaves and shoot, photosynthetic pigments and photosynthesis (A) without any alteration in stomatal conductance (gs) nor transpiration (E) while it reduced the intercellular CO2 (Ci) concentration, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidants; Growth; Malondialdehyde; Peroxidation; Photosynthesis.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000200251

Growth and feed utilization of the shrimp Farfantepenaeus paulensis fed diets containing different marine protein sources
Provedor de dados: Ciência Rural
Autores: Cavalli,Ronaldo Olivera; Zimmermann,Sérgio; Speck,Roger Crippa.
Five isonitrogenous and isoenergetic diets containing different protein sources (fish, squid and mussel meals and their combinations at the proportions of 40, 30 and 30% or 60, 20 and 20%) were fed for 28 days to Farfantepenaeus paulensis. Growth performance and feed utilization of shrimp fed the fish meal-based diet was comparatively inferior to those fed other protein sources or their combinations. This indicates that fish meal may not be the best protein source for F. paulensis. Feeds containing a mixture of protein sources are better utilized by F. paulensis and therefore result in significantly higher growth than those containing a single protein source.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shrimp; Farfantepenaeus paulensis; Growth; Feed utilization; Protein sources.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000300036

Estimated live weight of growing Pêga breed donkeys
Provedor de dados: Ciência Rural
Autores: Moreira,Camilla Garcia; Balieiro,Júlio César de Carvalho; Menezes,Madalena Lima; Ribeiro,Gabriela; Nascimento,Olivia Carmen de Araújo; Brandi,Roberta Ariboni.
ABSTRACT: The equations available in the literature to estimate the body weight (BW) of Pêga breed donkeys were evaluated using 25 animals aged 0-6 months and it was proposed an equation for BW prediction. For the measurement of the thoracic perimeter (TP) and for weighing the animals using the weighing tape, the animals were positioned in a forced station on a steep slope. An electronic scale was used for the determination of the BW. Accuracy of linear and nonlinear equations described in the literature was tested for BW prediction based on the animals’ TP, followed by the comparison of these equations with the equation developed in the present study for BW prediction of Pêga breed donkeys. A difference was noted (P&lt;0.001) between the weights obtained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Accuracy; Asinine; Equations; Estimation; Growth.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000651

The influence of the photoperiod on productive performance and survival of piabanha-of-Pardo (Brycon vonoi ), hatchery
Provedor de dados: Ciência Rural
Autores: Pedreira,Marcelo Mattos; Costa,Deliane Cristina; Schorer,Marianne.
ABSTRACT: This research aimed to verify the influence of the photoperiod on the performance and survival piabanha-of-Pardo (Brycon vonoi) larvae. Piabanha-of-Pardo larvae 24 hours post-hatch, with body weight of 2.44 ± 0.02mg, and total length of 7.82 ± 0.46mm, were subjected to five different photoperiods: 0L:24D, 6L:18D, 12L:12D, 18L:6D and 24L:0D (871.12 ± 92.65 lux). Daily, the water temperature, dissolved oxygen (DO), percentage of oxygen saturation, pH, and water conductivity were monitored, and presented similar water quality values among tanks with distinct photoperiods, and within the range considered appropriate for the genus Brycon larvae. Piabanha-of-Pardo larvae have better productive performance and survival rate at longer photoperiods, over...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brycon vonoi; Growth; Larviculture; Luminosity; Survival.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000100402

Post-weaning feeding levels on feeding behavior, growth and development in Holstein dairy heifers
Provedor de dados: Ciência Rural
Autores: Quintana,Emanuel De La; Mendoza,Alejandro; Cajarville,Cecilia; Bentancur,Oscar; Repetto,José Luis.
ABSTRACT: To study the effect of post-weaning feeding levels on the growth of dairy heifers, 40 animals with 77.7 ± 8.1 days of age and 77.5 ± 9.2kg of body weight were grouped in 10 pens, and each pen was randomly assigned to one of the following treatments for 120 days: feeding level to achieve a body weight gain of 600 (TMEDIUM) or 800 (THIGH) g/day based on a total mixed ration. After this period all heifers were managed as a single group for 150 days. Nutrient intake, behavior, body weight and other morphological measures were recorded in each animal. As a result of the experimental design THIGH heifers had a higher nutrient intake than TMEDIUM heifers, which was reflected in a higher daily weight gain, withers height, heart girth and hip width....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heifer; Feeding level; Growth.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000300651

Citral as food additive for common snook - zootechnical parameters and digestive enzymes
Provedor de dados: Ciência Rural
Autores: Michelotti,Bruna Tomazetti; Mori,Natacha Cossettin; Magnotti,Caio Cesar Franca; Heinzmann,Berta Maria; Almeida,Ana Paula Gottlieb; Cerqueira,Vinicius Ronzani; Baldisserotto,Bernardo.
ABSTRACT: Essential oils of plants whose main compound is citral showed beneficial effects when added to fish feed. The objective of the present study was to evaluate the dietary effect of the addition of citral on zootechnical parameters and digestive enzyme activities of Centropomus undecimalis. Juveniles were fed for 45 days with diets containing different amounts of citral (0.0 - control, 0.5, 1.0, and 2.0 mL per kg of diet). The water quality parameters were kept stable during the experiment and no mortality was observed. At the end of the experimental period, the treatment 0.5 mL citral per kg of diet had the lowest weight gain and specific growth rate, and the highest feed conversion, while the same parameters did not differ between the other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Centropomus undecimalis; Amylase; Pepsin; Lipase; Growth; Marine fish farming.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400651

Growth and nodulation in soybean cultivated on two substrata and treated with five rates of metolachlor
Provedor de dados: Ciência Rural
Autores: Amarante,Cassandro Vidal Talamini do; Canci,Paulo Cesar.
The effect of metolachlior [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-l-methylethyl) acetamide] at rates of 0.0, 1.5, 3.0, 4.5, and 6.0kg a.i./ha on the growth and nodulation of soybean cv. BR-4 cultivated on two substrata (soil and soil + sand) and inoculated with Bradyrhizobium japonicum (Kirchnea-1896) Jordan 1982, 137 (Denotes that this name has been validly published in the oficial publicadon, Intemational Joumal of Systematic Bacteriology), was studied under greenhouse conditions at Lages, SC, Brazil, in 1992-93. The experimental design was completely randomized with four replicates. The experimental unit was a container with two plants. Fifty-two days after the emergence (at R1 stage - beginning of flowering) the plants were harvested and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Metolachlor; Glycine max (L.) Merril; Growth; Nodulation.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781995000300001

Growth and physiological responses of sunflower plants exposed to ultraviolet-B radiation
Provedor de dados: Ciência Rural
Autores: Cechin,Inês; Fumis,Terezinha de Fátima; Dokkedal,Anne Ligia.
The effects of UV-B radiation were studied in sunflower plants (Helianthus annuus L. cv. Catissol-01) growning in greenhouse under natural photoperiod conditions. The plants received approximately 0.60Wm-2 (control) or 4.0Wm-2 (+UV-B) of UV-B radiation for 7h d-1, centered around solar noon from 15 days after sowing. Compared to the control, plants exposed to high UV-B radiation for 12 or 21 days did not show any difference in shoot dry matter, specific leaf weight or UV-B absorbing compounds. Enhanced UV-B radiation caused a significant inhibition of photosynthesis (A) only in the first sampling and this was accompained by reduction in stomatal conductance (g s) and transpiration rate. The inhibition in A can not be fully explained by reduction in g s...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Helianthus annuus; Phenolics; Photosynthesis.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000100014

Deposition of bodily chemical components in the carcass of tilapia (Oreochromis sp.) strains
Provedor de dados: Ciência e Agrotecnologia
Autores: Allaman,Ivan Bezerra; Reis Neto,Rafael Vilhena; Freitas,Rilke Tadeu Fonseca de; Rosa,Priscila Vieira; Lago,Aline de Assis; Costa,Adriano Carvalho.
The knowledge of how animals deposited chemical components as water, protein, fat and ash in the carcass is importance for the formulation of a balanced diet, allowing maximum performance with a low environmental impact. So, the study was carried out to evaluate the influence of different tilapia strains (Chitralada, Commercial, Red and Universidade Federal de Lavras [UFLA]) on the deposition of bodily chemical components in the carcass. The bodily components analyzed were water, protein, fat and ash. For the determination of the bodily chemical deposition curves by age, the exponential, Brody, logistic, Gompertz and von Bertalanffy models were adjusted. The Commercial and UFLA strains deposited water at a faster speed (P&lt;0.05) compared with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bodily components; Nonlinear models; Fish; Growth.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000500008

Effects of digestible protein to energy ratios on growth and carcass chemical composition of siamese fighting fish (Betta splendens)
Provedor de dados: Ciência e Agrotecnologia
Autores: Lemos,Marcos Vinicius Antunes de; Arantes,Thiago Quirino; Souto,Cristielle Nunes; Martins,Graciela Pessoa; Araújo,Janaína Gomes; Guimarães,Igo Gomes.
The expansion in the market of ornamental fish depends on the intensification of production systems and the generation of appropriate technologies. Therefore, it is necessary to know the nutritional requirements of each species for the formulation of nutritionally balanced diets. A 30-day feeding trial was undertaken to evaluate the effects of different dietary digestible protein to energy ratio in diets for Betta splendens fingerlings. Fifty-six all-male B. splendens with 1.03 ± 0.11 g average weight were randomly stocked into 56 1L-aquaria in a completely randomized design with a 2 x 4 factorial arrangement, comprising eight treatments and seven replication. Each fish was considered an experimental unit. Diets were formulated to contain 28.0, 35.0, 42.0...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Protein requirement; Ornamental fish; Carcass composition; Energy requirement; Growth.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100009

Development and dry mass accumulation in callalily at the initial cultivation stage
Provedor de dados: Ciência e Agrotecnologia
Autores: Carneiro,Daniella Nogueira Moraes; Almeida,Elka Fabiana Aparecida; Paiva,Patrícia Duarte de Oliveira; Frazão,Jussara Ellen Morais; Santos,Fernanda Helena de Souza; Carneiro,Leandro Flávio.
The cultivation of the calla lily, despite its importance in the floriculture sector, is still limited due to the lack of knowledge of basic production techniques such as development and dry mass accumulation. These techniques facilitate more appropriate management, especially regarding the application of fertilizers, providing better nutrients utilization and greater yields. Thus, this study was aimed at evaluating the growth and development of calla lily plants, establishing growth curves according to dry mass accumulation. Acclimatized and micropropagated calla lily plantlets were grown in plastic pots containing coconut fiber as a substrate and fertilized with a modified formula of Malavolta. Treatments consisted of assessments at intervals of 30 days...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zantedeschia aethiopica; Floriculture; Growth; Production.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600007

Fiber level for laying hens during the growing phase
Provedor de dados: Ciência e Agrotecnologia
Autores: Freitas,Ednardo Rodrigues; Braz,Nádia de Melo; Watanabe,Pedro Henrique; Cruz,Carlos Eduardo Braga; Nascimento,Germano Augusto Jerônimo do; Bezerra,Roseane Madeira.
Feeding management of laying hens has been focused on the direct influence of nutrient intake on weight gain, especially at growing phase. This study evaluates nutrient digestibility, performance, development of the digestive tract, body composition, and bone quality of two strains of laying hens fed with different levels of neutral detergent fiber (NDF) during the growing phase from the 7th to the 12th week of age. A total of 1,296 birds were distributed in a completely randomized design in a 2 x 3 factorial arrangement (two strains x three levels of NDF) with four replicates of 54 birds per treatment. Semi-heavy (Hy Line Brown) and light-strain (Lohman LSL) pullets were allotted to dietary treatments consisting of 14.50, 16.50, and 18.50% NDF. An...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Insoluble fiber; Neutral detergent fiber; Strain.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200010