Consulta: subjectFacets:"Growth rate"
Registros recuperados: 89
Data/hora: 13/06/2024 05:54:36

Efecto del AG4/7 y anillado en la inducción de estructuras reproductivas y crecimiento del brote en árboles juveniles de Pseudotsuga menziesii.
Provedor de dados: 32
Autores: Muñoz Gutiérrez, Liliana.
Con el propósito de establecer un programa de producción de semilla en Pseudotsuga menziesii y disminuir la presión en la cosecha de semilla en poblaciones naturales de la especie, se evaluó el efecto del ácido giberélico (AG4/7) y del anillado en el tronco en la formación de estructuras reproductivas y en el crecimiento del brote en dos ensayos de campo y uno en macetas con árboles juveniles. Se utilizaron cuatro dosis de AG4/7 (0, 1.27, 2.55 y 5.10 mg cm-2) aplicadas por inyección en el tronco; durante el periodo de crecimiento se midió la longitud del brote y un año después se evaluó el porcentaje de árboles con respuesta, y el número y posición de las estructuras reproductivas. La proporción de árboles con estróbilos femeninos fue de 37.5 % en el...
Palavras-chave: Acido giberélico (AG4/7); Anillado; Fenología; Floración; Producción de semilla; Longitud de brote; Tasa de crecimiento; Gibberellic acid (GA4/7); Bark girdling; Phenology; Flowering; Seed production; Shoot length; Growth rate; Maestría; Forestal.
Ano: 2010
URL: http://hdl.handle.net/10521/61

Efecto del AG4/7 y anillado en la inducción de estructuras reproductivas y crecimiento del brote en árboles juveniles de Pseudotsuga menziesii.
Provedor de dados: 32
Autores: Muñoz Gutiérrez, Liliana.
Con el propósito de establecer un programa de producción de semilla en Pseudotsuga menziesii y disminuir la presión en la cosecha de semilla en poblaciones naturales de la especie, se evaluó el efecto del ácido giberélico (AG4/7) y del anillado en el tronco en la formación de estructuras reproductivas y en el crecimiento del brote en dos ensayos de campo y uno en macetas con árboles juveniles. Se utilizaron cuatro dosis de AG4/7 (0, 1.27, 2.55 y 5.10 mg cm-2) aplicadas por inyección en el tronco; durante el periodo de crecimiento se midió la longitud del brote y un año después se evaluó el porcentaje de árboles con respuesta, y el número y posición de las estructuras reproductivas. La proporción de árboles con estróbilos femeninos fue de 37.5 % en el...
Palavras-chave: Acido giberélico (AG4/7); Anillado; Fenología; Floración; Producción de semilla; Longitud de brote; Tasa de crecimiento; Gibberellic acid (GA4/7); Bark girdling; Phenology; Flowering; Seed production; Shoot length; Growth rate; Maestría; Forestal.
Ano: 2010
URL: http://hdl.handle.net/10521/61

Evaluación agronómica de 23 genotipos de Brachiaria humidicola en el trópico húmedo de México
Provedor de dados: 32
Autores: Cruz López, Pedro Ixkin.
En la región tropical de México, donde la producción bovina se basa en sistemas   extensivos bajo condiciones de pastoreo, los pastos  del genero Brachiaria han sido de  gran importancia debido a su alto rango de adaptación, mayor rendimiento y calidad  nutricional. El objetivo del presente estudio fue evaluar el rendimiento total, composición  morfológica, tasa de crecimiento, densidad de tallos y dinámica de ahijamiento de 23  genotipos de Brachiaria humidicola y un hibrido. El estudio se realizó de junio 2006 a  mayo de 2007 en el Sitio Experimental “Papaloapan”, ubicado en Isla Veracruz. Los  tratamientos fueron los 23 genotipos y un hibrido (evaluados cada 28 en la época de  lluvias y 42 días en la época de nortes y seca) distribuidos aleatoriamente...
Tipo: Tesis
Palavras-chave: Genotipos; Brachiaria humudicola; Rendimiento; Tasa de crecimiento densidad de tallos; Maestría; Ganadería; Genotypes; Herbage yield; Growth rate; Tiller population density.
Ano: 2009
URL: http://hdl.handle.net/10521/1432

Patrón de rebrote y comportamiento productivo de la asociación del Pasto Ovillo (Dactylis glomerata L.), Ballico perenne (Lolium perenne L.) y Trébol blanco (Trifolium repens L.)
Provedor de dados: 32
Autores: Castro Rivera, Rigoberto.
El objetivo del estudio fue determinar la mejor asociación de dos gramíneas y una  leguminosa en rendimiento de forraje, tasa de crecimiento (TC), composición  botánica, tasa de recambio de tejido y dinámica de ahijamiento. Se evaluaron cinco  tratamientos: 40:30:30% Trébol blanco-Ovillo-Ballico perenne (40:30:30% de TB-O-  BP); 40:60% Trébol blanco-Ballico perenne; (40:60% de TB-BP); 40:60% Trébol  blanco-Ovillo (40:60% de TB-O); 40:40:20% Trébol blanco-Ovillo-Ballico perenne  (40:40:20% de TB-O-BP) y 40:20:40% Trébol blanco-Ovillo-Ballico perenne (40:20:40  de TB-O-BP). Se utilizaron 20 unidades experimentales de 104 m2, mediante un  diseño en bloques completos al azar con cuatro repeticiones. Los resultados  muestran que la asociación 40:20:40% de...
Tipo: Tesis
Palavras-chave: Praderas asociadas; Trébol blanco; Ballico perenne; Ovillo; Producción de forraje; Dinámica de la pradera; Tasa de crecimiento.; Doctorado; Ganadería; White clover; Perennial ryegrass; Cocksfoot; Herbage yield; Sward dynamics; Growth rate.
Ano: 2009
URL: http://hdl.handle.net/10521/1224

Parámetros genéticos e interacción genotipo x ambiente en el crecimiento de progenies reintroducidas y nativas de Pinus patula.
Provedor de dados: 32
Autores: Gómez Martínez, Procoro.
Pinus patula Schiede ex Schltdl. et. Cham., es una especie nativa de México ampliamente utilizada en plantaciones comerciales en diferentes regiones del mundo; la especie ha sido mejorada en el extranjero, y es necesario evaluar el material al ser reintroducido a su país de origen. Se comparó el crecimiento de 36 familias de medios hermanos seleccionadas en Colombia y Sudáfrica, reintroducidas en México (grupo R) y 36 familias de medios hermanos escogidas fenotípicamente en rodales naturales (grupo N), en dos sitios con ambientes contrastantes: Aquixtla, Puebla, a 2,930 m (S1) y Acaxochitlán, Hidalgo, a 2,260 m (S2). Se midió el diámetro normal, la altura total y el volumen del fuste a los siete y ocho años de edad, y la conformación del árbol y el número...
Palavras-chave: Análisis de estabilidad; Correlación genética tipo B; Crecimiento; Ganancia genética; Heredabilidad; IGA; Parámetros genéticos; Pinus patula; Progenies; Reintroducción; Adaptation; Ecovalence; Genetic stability; Genetic gain; Genetic parameters; Growth rate; GEI; Heritability; Progeny test; Type-B genetic correlation; Reintroduction; Forestal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1892

Comportamiento productivo del pasto ovillo (Dactylis glomerata L.) en respuesta al pastoreo
Provedor de dados: 32
Autores: Hernández Guzmán, Filogonio Jesús.
El pasto ovillo es una de las gramíneas mas usadas en la producción animal, en la  zona templada de México. Sin embargo, la gran variación en los resultados encontrados en praderas de pasto ovillo hacen necesario generar información acerca del manejo mas apropiado tanto de la frecuencia como intensidad de defoliación. El objetivo de este estudio fue determinar la frecuencia e intensidad de pastoreo que proporcione mayor rendimiento de forraje en una pradera de pasto ovillo (Dactylis glomerata L.). La investigación se llevó a cabo  en el Colegio de Posgraduados, Campus Montecillo, Edo de México de junio 2005 a junio 2006. Los tratamientos fueron la combinación de tres frecuencias  (21, 28 y 35 días) y dos intensidades (5-7 y 9-11 cm) de pastoreo, que se...
Tipo: Tesis
Palavras-chave: Dactylis glomerata L.; Frecuencia e intensidad de pastoreo; Rendimiento de forraje; Tasa de crecimiento; Composición botánica; Densidad de tallos; Maestría; Ganadería; Grazing intensity and frequency; Forage production; Growth rate; Botanical composition; Stem density.
Ano: 2007
URL: http://hdl.handle.net/10521/1564

Patrón de rebrote y comportamiento productivo de la asociación del Pasto Ovillo (Dactylis glomerata L.), Ballico perenne (Lolium perenne L.) y Trébol blanco (Trifolium repens L.)
Provedor de dados: 32
Autores: Castro Rivera, Rigoberto.
El objetivo del estudio fue determinar la mejor asociación de dos gramíneas y una  leguminosa en rendimiento de forraje, tasa de crecimiento (TC), composición  botánica, tasa de recambio de tejido y dinámica de ahijamiento. Se evaluaron cinco  tratamientos: 40:30:30% Trébol blanco-Ovillo-Ballico perenne (40:30:30% de TB-O-  BP); 40:60% Trébol blanco-Ballico perenne; (40:60% de TB-BP); 40:60% Trébol  blanco-Ovillo (40:60% de TB-O); 40:40:20% Trébol blanco-Ovillo-Ballico perenne  (40:40:20% de TB-O-BP) y 40:20:40% Trébol blanco-Ovillo-Ballico perenne (40:20:40  de TB-O-BP). Se utilizaron 20 unidades experimentales de 104 m2, mediante un  diseño en bloques completos al azar con cuatro repeticiones. Los resultados  muestran que la asociación 40:20:40% de...
Palavras-chave: Praderas asociadas; Trébol blanco; Ballico perenne; Ovillo; Producción de forraje; Dinámica de la pradera; Tasa de crecimiento. White clover; Perennial ryegrass; Cocksfoot; Herbage yield; Sward dynamics; Growth rate.
Ano: 2012
URL: http://hdl.handle.net/10521/841

Patrón de rebrote y comportamiento productivo de la asociación del Pasto Ovillo (Dactylis glomerata L.), Ballico perenne (Lolium perenne L.) y Trébol blanco (Trifolium repens L.)
Provedor de dados: 32
Autores: Castro Rivera, Rigoberto.
El objetivo del estudio fue determinar la mejor asociación de dos gramíneas y una  leguminosa en rendimiento de forraje, tasa de crecimiento (TC), composición  botánica, tasa de recambio de tejido y dinámica de ahijamiento. Se evaluaron cinco  tratamientos: 40:30:30% Trébol blanco-Ovillo-Ballico perenne (40:30:30% de TB-O-  BP); 40:60% Trébol blanco-Ballico perenne; (40:60% de TB-BP); 40:60% Trébol  blanco-Ovillo (40:60% de TB-O); 40:40:20% Trébol blanco-Ovillo-Ballico perenne  (40:40:20% de TB-O-BP) y 40:20:40% Trébol blanco-Ovillo-Ballico perenne (40:20:40  de TB-O-BP). Se utilizaron 20 unidades experimentales de 104 m2, mediante un  diseño en bloques completos al azar con cuatro repeticiones. Los resultados  muestran que la asociación 40:20:40% de...
Palavras-chave: Praderas asociadas; Trébol blanco; Ballico perenne; Ovillo; Producción de forraje; Dinámica de la pradera; Tasa de crecimiento. White clover; Perennial ryegrass; Cocksfoot; Herbage yield; Sward dynamics; Growth rate.
Ano: 2012
URL: http://hdl.handle.net/10521/853

Crecimiento, arquitectura y anatomía de especies  forestales en una selva baja caducifolia del sur de Yucatán
Provedor de dados: 32
Autores: Interián Ku, Víctor Manuel.
Caesalpinia gaumeri Greenm y Gymnopodium floribundum Rolfe, son especies  forestales importantes para los Mayas de Yucatán, que se utilizan en las  construcciones rurales y para la producción apícola respectivamente. El propósito de  este trabajo es conocer el crecimiento en diámetro, arquitectura, morfometría y  anatomía de C. gaumeri y la arquitectura y morfometría de G. floribundum. En C.  gaumeri la tasa anual de crecimiento aumentó de las categorías menores a las  mayores (0.41-0.85 cm), de las calidades de copa dañadas a las simétricas (0.23-  0.85 cm) y de las incidencias de luz parciales a las totales (0.53-0.84 cm). El  crecimiento acumulado en diámetro fue significativamente (Tukey, P &lt; 0.05) mayor  para las categorías diamétricas de 12.5 a...
Tipo: Tesis
Palavras-chave: Kitimché; Tzitzilché; Bandas dendrométricas; Posición y calidad de copa; Tasa de crecimiento; Morfología; Estructuras celulares; Doctorado; Botánica; Kitimché; Tzitzilché bands dendrometrical; Position and quality of canopy; Growth rate; Morphology; Cellular structures.
Ano: 2009
URL: http://hdl.handle.net/10521/1474

Artificial family selection based on growth rate in cultivated lines of Litopenaeus vannamei (Decapoda, Penaeidae) from Venezuela
Provedor de dados: 74
Autores: De Donato,Marcos; Ramirez,Raúl; Howell,Chris; Verginelli,Roberto; Orta,Tomás; Cabrera,Saúl; Mata,Enrique; Manrique,Ramón.
We investigated the effects of family selection on the growth rates of four genetic lines of Litopenaeus vannamei, the Pacific white shrimp, from Venezuela. The mean family weight at selection was 16.79 g and the mean growth rate was 0.169 g d-1 at a mean age of 138 days. The mean growth rates per generation were 0.141 g d-1 for the parental generation (P0), 0.173 g d-1 for the F1 and 0.191 g d-1 for the F2. Survival varied from 83.3% to 94.4%. There were statistically significant differences between lines, with lines B and C, growing at higher temperatures and lower salinities, showing the fastest growth. Regression analysis between growth rate and age for each genetic line showed high r² values, but smaller than those shown between growth rate and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Family selection; Genetic improvement; Growth rate; Litopenaeus vannamei.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500009

Growth and yield of Cantaloupe melon 'Acclaim' in protected cultivation using agrotextile
Provedor de dados: 75
Autores: Santos,Francisco GB; Negreiros,Maria Z; Medeiros,José F; Lopes,Welder AR; Soares,Alinne M; Nunes,Glauber HS; Freitas,Francisco CL.
In Rio Grande do Norte, the melon growers have been using the row cover on the roof of the plants to start flowering in order to reduce the population of insect pests that cause severe losses, rising production costs, especially with the application of defensive. Thus, it is important to know the best time to remove the row cover because, due to its use, it is assumed that there are changes in the physiological response of plants. In order to evaluate the growth and yield of the melon plants 'Acclaim' cultivated under protection agrotextile (TNT) for different periods, a trial was conducted at the Universidade Federal Rural do Semi-árido, Mossoró, Rio Grande do Norte state. The experimental design was a randomized complete block, with four replications, in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis melo; TNT; Growth rate; Marketable production.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362014000100055

Сезонная изменчивость скорости роста фитопланктона             в прибрежных водах Чёрного моря (район Севастополя).
Provedor de dados: 13
Autores: Стельмах, Л. В.; Куфтаркова, Е. А.; Бабич, И. И.
На основе данных, полученных на трёх станциях в прибрежных поверхностных водах Чёрного моря (в районе Севастополя) в 2006 – 2007 гг., представлена сезонная динамика удельной скорости роста фитопланктонного сообщества. В течение года этот показатель изменялся приблизительно на порядок. Максимальные значения (2.00 – 2.70 сутки-1) наблюдались в периоды весеннего и осеннего «цветения» воды, вызванного диатомовой водорослью Chaetoceros socialis. Минимальные величины (0.06 – 0.10 сутки-1) отмечены зимой, когда в планктоне доминировали два вида диатомовых водорослей Sceletonema costatum и C. socialis. Получены количественные зависимости между концентрацией нитратов и кремния, с одной стороны, и удельной скоростью роста фитопланктона, с другой. Основным фактором,...
Tipo: Journal Contribution
Palavras-chave: Фитопланктон; Скорость роста; Хлорофилл a; Биогенные вещества; Чёрное море; Phytoplankton; Growth rate; Chlorophyll a; Nutrients; Black Sea; Фітопланктон; Швидкість росту; Хлорофіл a; Біогенні сполуки; Чорне море.
Ano: 2009
URL: http://repository.ibss.org.ua/dspace/handle/99011/843

Использование мочевины при выращивании синезеленой микроводоросли Spirulina platensis (Nordst.) Geitl. в накопительной культуре
Provedor de dados: 13
Autores: Дробецкая, И. В.
Приводятся данные о влиянии различных концентраций мочевины, а также разных соотношений мочевины и нитратов в питательной среде на рост и химический состав Spirulina platensis в условиях накопительной культуры. Установлено, что высокие концентрации карбамида в среде (300 мг азота (N)/л и выше) угнетают рост водорослей вплоть до гибели клеток. Использование мочевины в комплексе с нитратами (в соотношении 1:4 по N) оказывает положительный эффект, выражающийся в увеличении продуктивности культуры и содержания белка, хлорофилла а, С-фикоцианина и каротиноидов в биомассе.
Tipo: Journal Contribution
Palavras-chave: Мочевина; Нитраты; Питательная среда; Продуктивность культуры; Биомасса; Urea; Nitrates; Nutrient; Growth rate; Biomass Urea Nitrates Growth rate Biomass Nitrates Biomass Urea Growth rate http://aims.fao.org/aos/agrovoc/c_5187 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_8090 http://aims.fao.org/aos/agrovoc/c_16130.
Ano: 2002
URL: http://repository.ibss.org.ua/dspace/handle/99011/392

Влияние спектрального состава света на рост и содержание пигментов в Synechococcus elongatus Nägeli
Provedor de dados: 13
Autores: Акимов, А. И.; Ефимова, Т. В.
У Synechococcus elongatus, адаптированной к свету различного спектрального состава (белый, синий, зелёный, красный), максимальная скорость роста наблюдалась на красном свету, а минимальная – на синем. На белом и зелёном свету скорости роста были примерно равны. Достоверных изменений внутриклеточного содержания пигментов и соотношения пигментов в клетках не наблюдалось, в связи с чем можно заключить, что у S. elongatus отсутствует комплиментарная хроматическая адаптация.
Tipo: Journal Contribution
Palavras-chave: Адаптация; Synechococcus elongatus; Спектральный состав света; Скорость роста; Пигменты; Адаптація; Спектральний склад світла; Швидкість зростання; Пігменти; Аdaptation; Spectral light composition; Growth rate; Pigments.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1916

Аллометрия скоростей роста, питания и метаболизма гребневиков и медуз
Provedor de dados: 13
Autores: Заика, В. Е.
На материалах по росту и скорости метаболизма гребневиков и медуз подтверждено ра­нее сделанное автором заключение о соответствии роста этих желетелых животных экспоненци­альному варианту балансовой модели роста. Эта модель основана на предположении, что при экспоненциальном росте аллометрические уравнения скоростей питания и метаболизма имеют показатель степени, равный 1 (изометрия), что и подтверждают данные по аллометрии скорости дыхания и экскреции аммиака. Изометрия физиологических скоростей, по мнению автора, связана с отсутствием у же­летелых скелета и вероятным сохранением постоянной доли мезоглеи в теле гребневиков и медуз по мере их роста.
Tipo: Journal Contribution
Palavras-chave: Allometry; Growth rate; Allometry; Growth rate; Http://aims.fao.org/aos/agrovoc/c_24962; Http://aims.fao.org/aos/agrovoc/c_16130.
Ano: 2002
URL: http://repository.ibss.org.ua/dspace/handle/99011/502

Defasagem entre as produtividades real e potencial do algodoeiro herbáceo: limitações morfológicas, fisiológicas e ambientais.
Provedor de dados: 14
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

Teste e comparação de modelos matemáticos para o traçado de curvas granulométricas.
Provedor de dados: 14
Autores: LIMA, J. E. F. W.; SILVA, E. M. da.
RESUMO: O conhecimento sobre a distribuição granulométrica de partículas sólidas é essencial para as áreas de material de construção, mecânica dos solos, física dos solos, hidrossedimentologia, entre outras. Em geral, as técnicas utilizadas para a avaliação da distribuição granulométrica de amostras resultam em valores pontuais, dependendo de posterior interpolação para o traçado da curva granulométrica e a obtenção de diâmetros característicos específicos. A transformação de valores pontuais em funções contínuas pode ser realizada por meio de modelos matemáticos. Entretanto, poucos estudos têm sido desenvolvidos com o fito de determinar o melhor modelo para o ajuste de curvas granulométricas. Sendo assim, o objetivo deste trabalho foi testar e comparar 14...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Soil chemicophysical properties; Non-linear regression; Growth rate; Growth curves.; Curva de Crescimento; Física do Solo; Granulometria; Regressão Linear; Solo; Textura do Solo.; Granules; Soil texture.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569214

Effect of type of binder on growth, digestibility, and energetic balance of Octopus maya
Provedor de dados: 5
Autores: Rosas, C; Tut, J; Baeza, J; Sanchez, A; Sosa, V; Pascual, C; Arena, L; Domingues, P; Cuzon, Gerard.
The present study was designed to test the effects of type of binder on growth, nutritional physiology, total apparent digestibility, and some elements of the energetic balance of early O. maya juveniles. Two experiments were performed. One was aimed at evaluating the effect of type of binder on growth, nutritional physiology, and energetic balance and the other at knowing the effect of the binder on total apparent digestibility of O. maya. Binder type affected growth and survival of early O. maya juveniles. Octopuses fed alginate-bound crab meat lost weight and died, revealing that this type of binder limits nutrient absorption from the diet. In contrast, when gelatin was used as binder, energetic balance was similar to that obtained in animals fed...
Tipo: Text
Palavras-chave: Growth rate; Energetic balance; Diet binder; Digestibility; Octopus maya.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3949.pdf

Physiological and behavioral responses of phytoplankton communities to nutrient availability in a disturbed Mediterranean coastal lagoon
Provedor de dados: 5
Autores: Leruste, A.; Pasqualini, V.; Garrido, M.; Malet, Nathalie; De Wit, R.; Bec, Beatrice.
Short-term bioassays were conducted in Biguglia lagoon (Corsica) to study the physiological and behavioral responses of phytoplankton to N- and P-availability. Natural communities were collected in two stations representative of the two sub-basins, at three periods with contrasting environmental characteristics to address the impact of seasonal variability. These samples were separately enriched with a full N and P enrichment, and with enrichments minus N or minus P. Phytoplankton size structuration, diversity, and growth of the total phytoplankton, the micro-, nano- and ultraphytoplankton were evaluated using spectrofluorimetry, and optical microscopy. Results showed that the communities were fueled by NO3− in the wet periods (autumn and spring) and NH4+...
Tipo: Text
Palavras-chave: Growth rate; Dilution experiment; Eutrophication; Functional traits.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00481/59238/61948.pdf

Growth anomalies in Pecten maximus from coastal waters (Bay of Brest, France): relationship with diatom blooms
Provedor de dados: 5
Autores: Lorrain, Anne; Paulet, Yves-marie; Chauvaud, Laurent; Savoye, Nicolas; Nezan, Elisabeth; Guerin, Laurent.
The aim of this study was to characterize the daily shell growth of Pecten maximus from early 1998 to late spring 1999 in the Bay of Brest with a careful qualitative and quantitative description of the pelagic primary production. Our results, in accordance with previous studies, demonstrate that there are episodic declines in the growth rate. Concurrent events of low growth rate and large bottom-concentrations of algae following diatom blooms (Cerataulina pelagica or Rhizosolenia delicatula), suggests that this high concentration of phytoplankton on the bottom layer may affect food intake or respiratory activity of the scallops by gill clogging or oxygen depletion. In this study, silicic acid or phosphorus are inferred to be limiting factors responsible...
Tipo: Text
Palavras-chave: Biscay bay; Limiting factors; Primary production; Phytoplankton cnoncentration; Pecten maximus; Growth rate.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-612.pdf

Bathymetric distribution and growth rates of Eunicella verrucosa (Cnidaria: Gorgoniidae) populations along the Marseilles coast (France)
Provedor de dados: 5
Autores: Sartoretto, Stephane; Francour, Patrice.
Gorgonians are important organisms in the Mediterranean Sea, where they form rocky benthic communities. Four main species (3 Holaxonia and 1 Scleraxonia) are predominant in infra- and circalittoral communities of the northwestern Mediterranean basin. Other species, such as Eunicella verrucosa (Pallas, 1766), are more rarely encountered. The expansion to unusually shallow bathymetric levels has been noted in the region of Marseilles (France) (between 20 and 40 m depth). A ten-year monitoring of colonies was used to assess the growth rate according to age (size): from 3.33 cm year(-1) (height &lt;15 cm) to 0.62 cm year(-1) (height &gt;40 cm).
Tipo: Text
Palavras-chave: Eunicella verrucosa; Mediterranean Sea; Growth rate; Population structure.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00087/19859/17508.pdf

Energy-protein management by some warmwater finfishes.
Provedor de dados: 5
Autores: Luguet, P; Moreau, Y.
If warmwater finfish protein requirements as level in diet is low, absolute intake per day is similar to those of coldwater species. But relation of this requirement with specific growth rate differs for strictly warmwater fishes as Tilapias. Analysis of partition between protein and non-protein energy retention shows that these species with Clarias make a better use of non-protein energy provided and consequently improve their protein retention. Better carbohydrate digestibility and metabolism are propounded as part of the explanation.
Tipo: Text
Palavras-chave: Clarias; Oreochromis mossambicus; Oreochromis aureus; Oreochromis niloticus; Tilapia; Cichlidae; Pisces; Nutritional requirements; Digestibility; Diets; Proteins; Metabolism; Carbohydrates; Nutrition; Feeding; Growth rate.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1424.pdf

Intensive culture of the Manila clam (Ruditapes philippinarum) in marine ponds. The impact of rearing densities and feeding levels on growth rates and yields
Provedor de dados: 5
Autores: Baud, Jean-pierre; Haure, Joel; Bodoy, Alain.
Intensive ongrowing (from 28 mm to the commercial size, 35 mm) of the Manila clam Ruditapes philippinarum was studied in experimental raceways with a natural bottom of clay. The factors controlled were rearing density (100, 200, and 300 individuals/m2) and food concentration (34.0 and 68.1 µg.1-1 chlorophyll a). Food was produced from a batch culture of Skeletonema costatum in a large volume (50 m3), thanks to the fertile ground and saline water. Best results regarding final size were obtained in the vicinity of the inflow with a densilY of 100 individuals/m2. However it was a density of 300 individuals/m2 which appeared from the following results to be the optimal choice for intensive rearing: the survival rate was 84 %, the final biomass was 4 kg/m2 and...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Skeletonema costatum; Elevage intensif; Marais maritime; Croissance; Rendement; Ruditapes philippinarum; Skeletonema costatum; Intensive rearing; Marine pond; Growth rate; Yield.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00038/14950/12276.pdf

Phytoplankton dynamics in the southern New Caledonian lagoon during a southeast trade winds event
Provedor de dados: 5
Autores: Neveux, Jacques; Lefebvre, Jean-pierre; Le Gendre, Romain; Dupouy, Cecile; Gallois, Francis; Courties, Claude; Gerard, Philippe; Fernandez, Jean-michel; Ouillon, Sylvain.
During the Echolag cruise (13 February-8 March 2007), the effect of 16-30 knot trade winds on abundance, community structure and dynamics of phytoplankton was investigated in the southern part of the New Caledonian coral reefs and surrounding oceanic waters. In this area, the coral reefs form two horn-like structures (hereinafter referred to as 'horn reefs'), oriented south-east, and separated by a relatively deep valley. Three repeated samplings at one week intervals of a 32 station array showed that trade winds induce surface water cooling and significant enrichment of mid- and bottom waters above the reef shelf. This enrichment appeared as the result of a general rise of the oceanic thermocline and nitracline due to the combination of trade winds and...
Tipo: Text
Palavras-chave: Chlorophyll; Phycoerythrin; Flow cytometry; Phytoplankton; In vivo fluorescence; Growth rate; Trade winds; Lagoon; Internal wave; New Caledonia.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00013/12437/9258.pdf

Phytoplankton strategies to exploit nutrients in coastal lagoons with different eutrophication status during re-oligotrophication
Provedor de dados: 5
Autores: Leruste, A; Guilhaumon, F; De Wit, R; Malet, Nathalie; Collos, Y; Bec, Beatrice.
We studied a mesotrophic and a hypertrophic Mediterranean coastal lagoon, both of which had been simultaneously subjected to a nutrient input reduction for 9 yr. We compared these 2 lagoons to an oligotrophic coastal lagoon. Using bioassays comprising 24 h incubations with added phosphorus and/or ammonium, we investigated the response of the phytoplankton communities to nutrient enrichment during summer in terms of biomass, size class structure, abundance and growth. For nitrogen and phosphorus, we identified which nutrient limited phytoplankton growth, and what strategies of nutrient exploitation the communities adopted to cope with these limitations. Ultraphytoplankton dominated the 3 communities, but it differed in composition among the lagoons. Green...
Tipo: Text
Palavras-chave: Growth rate; Nutrient limitation; Dilution experiment; HPLC.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00508/61978/66084.pdf

Nutrition of the seabass Lates calcarifer
Provedor de dados: 5
Autores: Cuzon, Gerard; Chou, R; Fuchs, Jacques.
The Primary Production Department of Singapore (PPD) studies covered the weaning of seabass from fingerlings stage onwards and the dietary protein requirement of early grow-out fish. Dietary protein requirement of early grow-out seabass was demonstrated to be between 40-50%, at dietary lipid level of 12%, using fishmeal protein. Nevertheless fish growth was significantly higher with trashfish feed, but apparent protein retention was significantly better with formulated feed.
Tipo: Text
Palavras-chave: Lates calcarifer; Fry; Nutritional requirements; Biochemistry; Food absorption; Growth rate; Fish meal; Seed (aquaculture); Dietary deficiencies; Fingerlings; Lipids; Proteins; Diets; Pellet feeds.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1425.pdf

Croissance des juvéniles du merlu (Merluccius merluccius) des eaux septentrionales de la Tunisie à partir de l'analyse des microstructures des otolithes
Provedor de dados: 5
Autores: Khoufi, Widien; Elleboode, Romain; Jaziri, Héla; El Fehri, Safouène; Bellamy, Elise; Ben Meriem, Sadok; Romdhane, Mohamed; Mahe, Kelig.
Hake (Merluccius merluccius) is widely distributed in the Atlantic Ocean and the Mediterranean Sea. It is one of the most exploited demersal fish. In Tunisia, hake is captured from the north to the south (KHOUFI et al., 2010). Hake is an important species of economic interest and thus the subject of a large literature, but its biology remains insufficiently known, particularly on terms of age and growth estimations, which are essential for stock assessment and management. Otolith microstructure provides a useful tool for age determination of juvenile hake, based on daily increment deposition (ARNERI &amp; MORALES-NIN, 2000; MORALES-NIN et al., 2005; KACHER &amp; AMARA, 2005; BELCARI et al., 2006). Consequently, we studied growth and estimated age, using...
Tipo: Text
Palavras-chave: Merluccius merluccius; Microstructure journalière; Phase pélagique; Taux de croissance; Merluccius merluccius; Daily microstructure; Pelagic phase; Growth rate.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00116/22681/20416.pdf

Fecundity, growth rate and survivorship at the interface between two contiguous genetically distinct groups of Semibalanus balanoides
Provedor de dados: 5
Autores: Brind'Amour, Anik; Bourget, Edwin; Tremblay, Rejean.
On the western coast of the Atlantic, according to the literature, 2 distinct groups of Semibalanus balanoides occur with a distinct interface near the Miramichi Estuary, New Brunswick, in the Gulf of St. Lawrence. On each side of this interface, the groups are characterized by clinal variations for MPI (mannose-6-phosphate isomerase) and GPI (glucose-6-phosphate isomerase). The present study was carried out to determine whether selection occurs at this interface, to establish how early in the sessile life period it occurs and to examine the selecting forces involved. Reciprocal transplant experiments of newly settled individuals to both sides of the interface were carried out. No significant differences specifically linked to source or destination were...
Tipo: Text
Palavras-chave: Semibalanus; Genetics; Selection; Fecundity; Growth rate; Survival.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00048/15970/13410.pdf

Decoupling light harvesting, electron transport and carbon fixation during prolonged darkness supports rapid recovery upon re-illumination in the Arctic diatom Chaetoceros neogracilis
Provedor de dados: 5
Autores: Lacour, Thomas; Morin, Philippe-israël; Sciandra, Théo; Donaher, Natalie; Campbell, Douglas A.; Ferland, Joannie; Babin, Marcel.
During winter in the Arctic marine ecosystem, diatoms have to survive long periods of darkness caused by low sun elevations and the presence of sea ice covered by snow. To better understand how diatoms survive in the dark, we subjected cultures of the Arctic diatom Chaetoceros neogracilis to a prolonged period of darkness (1 month) and to light resupply. Chaetoceros neogracilis was not able to grow in the dark but cell biovolume remained constant after 1 month in darkness. Rapid resumption of photosynthesis and growth recovery was also found when the cells were transferred back to light at four different light levels ranging from 5 to 154 µmol photon m−2 s−1. This demonstrates the remarkable ability of this species to re-initiate growth over a wide range...
Tipo: Text
Palavras-chave: Arctic microalgae; Polar night; Diatom; Darkness; Photosynthesis; Growth rate; Temperature.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00499/61066/64597.pdf

Acoustical monitoring of fish density, behavior, and growth rate in a tank
Provedor de dados: 5
Autores: Conti, Stéphane; Roux, Philippe; Fauvel, Christian; Maurer, Benjamin; Demer, David.
A challenge for the aquaculture community has long been the development of harmless techniques for monitoring fish in a tank. Acoustic telemetry has been used to monitor fish swimming behavior, and passive acoustics have been used to monitor fish feeding, but new techniques are needed to monitor non-invasively their numbers and growth rates. Recently, it has been demonstrated that the acoustical total scattering cross section of fish swimming in a tank can be measured from multiple reverberation time series. These measurements have been used successfully to estimate the number of fish in a tank in laboratory conditions, and to characterize their acoustical signatures. Here, we introduce a novel method for acoustically monitoring fish numerical density and...
Tipo: Text
Palavras-chave: Total scattering cross section; Fish counting; Growth rate; Remote monitoring; Fish behavior.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1121.pdf

Light and dark carbon uptake by Dinophysis species in comparison to other photosynthetic and heterotrophic dinoflagellates
Provedor de dados: 5
Autores: Graneli, Edna; Anderson, Donald M; Carlsson, Per; Maestrini, Serge Y.
The marine dinoflagellate genus Dinophysis includes species that are the causative agents of diarrhetic shellfish poisoning (DSP). Recent findings indicate that some Dinophysis species are mixotrophic, i.e. capable of both autotrophic and heterotrophic nutrition. We investigated inorganic (and organic) carbon uptake by several species of Dinophysis in the Light and dark using the 'single-cell C-14 method', and compared uptake rates with those of photosynthetic Ceratium species and heterotrophic dinoflagellates in the genus Protoperidinium. Experiments were conducted with water from the Gullmar Fjord and from the Koster Strait (Swedish west coast). Nutrient-enriched phytoplankton from surface water samples were concentrated (20 to 70 mu m) and incubated at...
Tipo: Text
Palavras-chave: Dinophysis; Growth rate; Mixotrophy; Carbon uptake; Ceratium; Protoperidinium.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00336/44679/45050.pdf

Interactions entre comportement et variations de la croissance des juvéniles de la sole (Solea solea) dans les nourriceries des pertuis Charentais
Provedor de dados: 5
Autores: Laffargue, Pascal.
This thesis aimed to identify and analyse processes involved in the functioning of sole Solea solea (L.) nurseries in the Pertuis Charentais, the most important oyster cultivation basin in Europe and a major nursery for the Bay of Biscay sole. Juveniles concentrate in coastal and estuarine habitats, which are essential in the biological cycle of this species but implies (i) adaptation to environmental variability and (ii), accessibility to habitat resources. Assuming that effective nurseries account for what fish must perform in response to habitat constraints, especially in selecting feeding, resting or refuge areas, we used both field works and mesocosm experiments to obtain integrative indicators of the nursery quality (growth rate, Fulton's condition...
Tipo: Text
Palavras-chave: Atlantic North East; Shellfish culture; Ingested organic carbon; Feeding; Tri iodothyronine T3; Thyroxine T4; Fulton's K; Growth rate; Flatfish; Essential habitat; Atlantique Nord Est; Conchyliculture; Carbone organique ingéré; Alimentation; Tri iodothyronine T3; Thyroxine T4; K de Fulton; Taux de croissance; Poisson plat; Habitat essentiel.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/these-182.pdf

Intensive larval rearing trials of red drum (Sciaenops ocellata ) in Martinique (F.W.I.).
Provedor de dados: 5
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

Mortalités printanière et estivale de l'huître creuse C. gigas en élevage à plat dans le bassin de Marennes-Oléron. Etude du métabolisme du glycogène sur différentes origines de cheptels
Provedor de dados: 5
Autores: Faury, Nicole; Remoue, Sophie; Soletchnik, Patrick; Goulletquer, Philippe; Geairon, Philippe; Le Moine, Olivier; Razet, Daniel; Guilpain, Patrice; Robert, Stephane; Taillade, Sylvie.
This study aims to assess the broodstock origin and cultural effects on oyster summer mortality rates. Three oyster batches, two originating from the Marennes-Oléron Bay, and one from the Normandy rearing area were deployed in March 2000 on the Ronce Perquis oyster bank, on experimental site since 1996. On bottom cultured oysters were monitored until January 2001. By the end of the experiment, the cumulative mortality ranged from 51 to 58 %. Following on initial mortality rate (8.8 % to 9.3 %), oyster batches showed a critical period early July. In 15 days, mortality rate reached 13.7 %. Over the rearing period, the oyster shell growth ranged between 8.9 g and 12.7 g. The somatic gain represented 0.44-0.48 g of dry meat weight. Spawning event occured in...
Tipo: Text
Palavras-chave: Taux de mortalité; Croissance; Composition biochimique; Effort de reproduction; Incorporation du glucose; Crassostrea gigas; Bassin de Marennes Oléron; Charente-Maritime; Mortality; Growth rate; Biochemical content; Glycogen synthase; Crassostrea gigas; Bay of Marennes Oleron; Charente-Maritime.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00031/14235/11511.pdf

Comparing diatom and Alexandrium catenella/tamarense blooms in Thau lagoon: Importance of dissolved organic nitrogen in seasonally N-limited systems
Provedor de dados: 5
Autores: Collos, Yves; Jauzein, Cecile; Ratmaya, Widya; Souchu, Philippe; Abadie, Eric; Vaquer, André.
Diatom blooms in Thau lagoon are always related to rain events leading to inputs of inorganic nutrients such as phosphate, ammonium and nitrate through the watershed with time lags of about 1 week. In contrast, blooms of Alexandrium catenella/tamarense can occur following periods of 3 weeks without precipitation and no significant input of conventional nutrients such as nitrate and phosphate. Field results also indicate a significant drop (from 22–25 to 15–16 μM over 3 days) in dissolved organic nitrogen (DON) at the bloom peak, as well as a significant inverse relationship between A. catenella/tamarense cell density and DON concentrations that is not apparent for diatom blooms. Such dinoflagellate blooms are also associated with elevated (6–9 μM) ammonium...
Tipo: Text
Palavras-chave: Alexandrium catenella/tamarense; Non classical blooms; Organic nitrogen; Ammonium; Growth rate.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00194/30488/29758.pdf

Age and growth of Zapteryx brevirostris (Elasmobranchii: Rhinobatidae) in southern Brazil
Provedor de dados: 83
Autores: Carmo,Wanessa P. D.; Fávaro,Luís Fernando; Coelho,Rui.
ABSTRACT Age and growth studies are fundamental to successful fisheries management. Zapteryx brevirostris (Müller &amp; Henle, 1841) is distributed off the Brazilian continental shelf and this species is assessed as “Vulnerable” in the Red List of the International Union for the Conservation of Nature (IUCN). Thus, the objective of this study was to present previously unknown information about the age and growth of Z. brevirostris that can be used for its management, conservation, and fisheries. A total of 162 specimens were sampled, with total lengths (TL) varying between 35.7 cm and 56 cm. The vertebrae were embedded in resin, sectioned in cuts with 0.5 mm thickness and the growth bands of the vertebrae were read under a light microscope. In the studied...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Back-calculation; Conservation; Growth rate; K value; Von Bertalanffy curves (VBGF).
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100210

Reproductive life history of Heterandria bimaculata (Heckel, 1848) (Poeciliinae: Poeciliidae) in the Honduran interior highlands: trait variation along an elevational gradient
Provedor de dados: 83
Autores: Olinger,Charles T.; Peoples,Brandon K.; Frimpong,Emmanuel A.
Abstract This study examined reproductive traits and growth rates of Heterandria bimaculata (Poeciliidae) in Cusuco National Park (CNP), a cloud forest reserve in northern Honduras, Central America. In CNP, H. bimaculata occurs in the absence of other fish species and major invertebrate predators along an approximately 1000 m elevation gradient. This allowed for the examination of trait variation along the gradient without the confounding effects of interspecific interactions or habitat patchiness. Heterandria bimaculata exhibited traits characteristic of a low-predation environment: balanced sex ratio, slow growth, late maturity and large female size. Females produced more, smaller eggs from upstream to downstream, but overall reproductive allocation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Central America; Fecundity; Growth rate; Livebearer; Offspring size.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000100003

New approaches for growth improvement in pejerrey Odontesthes bonariensis (Valenciennes, 1835) culture (Atherinomorpha: Atherinopsidae)
Provedor de dados: 83
Autores: Solimano,Patricio J.; Souza,Javier R. Garcia de; Maiztegui,Tomás; Baigún,Claudio R. M.; Colautti,Darío C.
The pejerrey is the most important recreational species in shallow temperate lakes and reservoirs of Argentina and the attempts to develop its culture have started a century ago. A common constraint of pejerrey aquaculture is its poor growth under traditional intensive rearing techniques. The aim of this study was to evaluate the possibility to achieve and maintain high growth rates of pejerrey throughout the rearing process by semi-intensive culture method . Four floating cages were installed in La Salada de Monasterio Lake and each one was stocked with 300 juveniles (10.22 ±0.38cm; 6.52 ±0.82g). From January through March all fish were exposed to natural zooplankton as food source, whereas from April to September two cages were supplied daily with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Fish growth; Floating cages; Growth rate; Zooplanktivorous.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100213

Culture en conditions optimisées de la macroalgue rouge &lt;Gracilaria gracilis&gt; (stackhouse) steentofr et al. dans le lac de Bizerte
Provedor de dados: 20
Autores: Ksouri, J.; Challougui, I.; Mensi, F.
La culture de Gracilaria  a été réalisée selon le mode de bouturage dans la partie Nord-Est du lac de Bizerte du 15 Avril au 31 Mai 2006 afin de déterminer l'effet des conditions initiales optimisées sur le rendement final.  Ces conditions initiales,  sont caractérisées par une culture sur le fond (sur cordes tendues), un poids initial des touffes de 200 g, une distance entre les rangées de culture de 50 cm et un écartement entre les touffes de 30 cm; de ce fait, la densité initiale est de 1,4 kg/m². Au terme de 46 jours de culture, nous avons enregistré un accroissement du poids de 200 g à 1280 g engendrant un taux de croissance spécifique de 4,03 %/j et une densité finale de 9,1kg/m² (soit 91t poids frais/ha).
Tipo: Journal Contribution
Palavras-chave: Algal culture; Aquaculture systems; Aquaculture techniques; Density; Growth rate; Off-bottom culture; Seaweed culture; Aquaculture techniques; Seaweed culture; Algal culture; Density; Growth rate; Http://aims.fao.org/aos/agrovoc/c_28992; Http://aims.fao.org/aos/agrovoc/c_6914; Http://aims.fao.org/aos/agrovoc/c_31892; Http://aims.fao.org/aos/agrovoc/c_2186; Http://aims.fao.org/aos/agrovoc/c_16130.
Ano: 2008
URL: http://hdl.handle.net/1834/3795

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: 20
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

Annual skeletal extension of two reef-building corals from the Colombian Caribbean Sea
Provedor de dados: 20
Autores: Charry, H.; Alvarado, E.M.; Sánchez, J.A.
The skeletal growth of the scleractinian corals Diploria labyrinthiformis (Linnaeus 1758) and Montastraea annularis (Ellis and Solander 1786) from Isla Grande (north of Rosario islands), Colombian Caribbean, was determined from annual extension increments revealed by X-radiography of 4-6 mm thick slabs obtained along the axis of maximum growth. The skeletal extension average rate for the last 22 years for D. labyrinthiformis was 3.8 mm year-1 (SE 0.10; N = 87). The correlation between growth of D. labyrinthiformi s and hours of sunlight was significantly negative. The annual variances of sunlight enhanced annual statistically significant differences of growth in this species. M. annularis showed an average extension growth of 10.6 mm year-1 (SE 0.32; N =...
Tipo: Journal Contribution
Palavras-chave: Growth rate; Coral reefs; Coral reefs; Growth rate; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_16130.
Ano: 2004
URL: http://hdl.handle.net/1834/3077

La pesquería de arrastre del camarón pomada (Protrachypene precipua) en la zona de Posorja-Ecuador durante 2008
Provedor de dados: 20
Autores: Chicaiza, D.; García-Sáenz, R.; Mendívez, W.
El desembarque total estimado durante 2008 por parte de la flota arrastrera pomadera en la zona de Posorja fue de 5 704 toneladas, existiendo un decremento del  3.3 %, con respecto al 2007. La CPUE promedio fue de 1 282 libras/barco/día. Se analizaron 2 008 individuos, de los cuales 42 % fueron machos y 58 % hembras. Entre abril y mayo se registraron altas capturas de individuos que aún no han alcanzado su madurez sexual (juveniles), coincidiendo con el periodo de mayor desembarque, comportamiento similar en los últimos cuatro años, (periodo de reclutamiento a la pesca). La talla media de madurez sexual fue de 7.6 cm LT alcanzada a los seis meses aproximadamente. Los parámetros de crecimiento estimados para 2008 fueron: K = 1,01 años-1 y L∞ = 10,3 cm (LT),...
Tipo: Journal Contribution
Palavras-chave: Trawlers; Landing statistics; Growth rate; Catch/effort; Sexual maturity.
Ano: 2009
URL: http://hdl.handle.net/1834/4782

Etude comparative du cycle sexuel  et de la relation taille-poids de deaux espèces d'athérine en Tunisie
Provedor de dados: 20
Autores: Bouriga, N.; Cherif, M.; Hajjej, Gh.; Guignard, J-P.; Faure, E.; Trabelsi, M.
Le présent travail porte sur l’étude des caractères biométriques des athérines de Tunisie pour compléter les études métriques et méristiques établies auparavant. L’objectif principal de cette étude, est de comparer les paramètres biologiques via l’analyse de la croissance et de la reproduction de Atherina boyeri (côtes nord tunisiennes) et Atherina lagunae (île Kerkennah). L’étude de la sex-ratio en fonction des mois a montré que les femelles sont toujours plus nombreuses que les mâles pour les espèces d’athérines. En effet, la valeur globale de la sex-ratio, toute taille confondue, est en faveur des femelles. L’étude du cycle sexuel des athérines insulaires des îles Kerkennah a montré que la période de reproduction s’établie entre le mois de mars et le...
Tipo: Journal Contribution
Palavras-chave: Coastal lagoons; Sex ratio; Growth rate; Length-weight relationships; Spawning seasons.
Ano: 2010
URL: http://hdl.handle.net/1834/4693

Tasa de crecimiento de Anadara tuberculosa (Sowerby, 1833) (Bivalvia: Arcidae) en la reserva ecológica manglares Cayapas-Mataje (REMACAM): Un análisis basado en sistemas de cajas suspendidas
Provedor de dados: 20
Autores: Flores, L.
La tasa de crecimiento y el incremento neto de crecimiento de Anadara tuberculosa fue estudiada por medio de muestreos mensuales en sistemas de cultivo entre el 2002 y 2003 en la Comunidad El Bajito en la REMACAM. Ocho cajas suspendidas fueron utilizadas, cuatro con conchas entre los 30 y 34.9 mm y cuatro con conchas entre los 35 y 39.9 mm. No se encontraron diferencias significativas entre cada uno de los sistemas de acuerdo a cada uno de los rangos de tallas utilizados, lo que permitió establecer incrementos netos entre los 10.17 a 11.99 mm y de 8.55 a 10.68 mm, respectivamente. El periodo de mayor crecimiento de A. tuberculosa fue de octubre hasta abril. Se estimaron tasas de crecimiento mensual que variaron de 0.01 a 1.94 mm mes"-1 en el primer caso y...
Tipo: Journal Contribution
Palavras-chave: Growth rate; Shells; Experimental culture.
Ano: 2010
URL: http://hdl.handle.net/1834/4838

Crecimiento poblacional del rotifero nativo  Brachionus sp. “Cayman”, al evaluar diferentes microalgas como alimento
Provedor de dados: 20
Autores: Cisneros, R.
Se estudió el crecimiento poblacional de la cepa Brachionus sp. “Cayman”, cepa Chilca, Perú, en respuesta a diferentes tratamientos con microalgas: Isochrysis galbana (T1), Chaetoceros gracilis (T2), Nannochloropsis oculata (T3), Isochrysis galbana + Chaetoceros gracilis + Nannochloris maculata (T4), Isochrysis galbana + Nannochloris maculata + Nannochloropsis oculata (T5) y Nannochloris maculata (T6). Se evaluó la densidad final de la población (DF), tasa de crecimiento (TC) y productividad (R). Los resultados mostraron diferencias estadísticas entre los tratamientos, encontrándose que T5 presentó mejores resultados en cuanto a DF (190 ± 5,51 indiv.mL-1), TC (0,40 ± 0,01 día-1) y R (38 080 ± 1,53 rot.L-1.día-1).
Tipo: Journal Contribution
Palavras-chave: Growth rate; Productivity; Algae resources; Rotifers; Productivity.
Ano: 2012
URL: http://hdl.handle.net/1834/5718

Panulirus argus postlarva performance fed with fresh squid
Provedor de dados: 20
Autores: Rodríguez-Viera, L.; Perera, E.
There is a great interest in the growout of spiny lobster postlarva captured in the wild. This activity has been developed  rapidly in Asia and especially in Vietnam. However, lack of appropriated formulated diets remains the main constrain to the  sustainable expansion of this activity worldwide. Until now,  best growth rates have been obtained with the use of high  inclusion of krill meal and/or krill hydrolysates which are expensive. However, squid is today avoided as food ingredient due  to low digestibility reported. Also, fresh squid has been demonstrated to produce poor growth performance in temperate  lobsters, but there is no report for P. argus fed exclusive on fresh squid. This work examines the effect of fresh squid on  growth of P. argus...
Tipo: Journal Contribution
Palavras-chave: Diets; Growth rate; Squid culture.
Ano: 2012
URL: http://hdl.handle.net/1834/4536

Regulación denso-dependiente del crecimiento individual de la almeja púrpura (Amiantis purpurata, Lamarck 1818)
Provedor de dados: 20
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

Características biológicas y de la pesca del savorín Seriolella porosa (Pisces: Centrolophidae) del Mar Argentino
Provedor de dados: 20
Autores: Garciarena, A.D.; Perrotta, R.G.
Length growth parameters were calculated and total length-weight and total length-fork length relationships, which showed no differences between sexes, were fitted for the South Atlantic bream (Seriolella porosa). Length at first maturity was also calculated. The results were as follows: L (mm)= 490.96k years-¹) = 0.154; t0 (years)= -3.915; W(g) = 4*10-6)*TL³.1989; FL(mm) = 0.8917*TL1.0006);L sub 50 (mm)= 290.61. Natural mortality was estimated at 0.274 and limit age at 11 years. Samples were taken during research surveys carried out in 1999 and 2000 in the Argentine Sea (Atlantic SW). Sagittae otoliths of 374 specimen were used for age determination. Total fish length ranged from 226 mm to 550 mm (1-14 years). Commercial landing data of trawl fleets for...
Tipo: Journal Contribution
Palavras-chave: Growth rate; Natural mortality; Length-weight relationships; Catch/effort; Landing statistics; Fishery biology; Fishery resources; Growth rate; Fishery biology; Fishery resources; Http://aims.fao.org/aos/agrovoc/c_16130; Http://aims.fao.org/aos/agrovoc/c_2937; Http://aims.fao.org/aos/agrovoc/c_2942.
Ano: 2002
URL: http://hdl.handle.net/1834/2416

Evaluación de diferentes densidades de la microalga Nannochloropsis oculata como alimento Paraartemia
Provedor de dados: 20
Autores: Tizol-C., Rafael.
Laboratory experimente were carried out to determine the possibility of using the microalgae Nannochloropsis oculata as a food source for brine shirmp. Among the range concentrations studied (3 x 105 to 14 x 105 cells/ml), 12 x 105 cells/ml offered the best resulte of survival and growth rate and it is recommended as the most effective. From correlation matrix, high valúes (r &gt; 0.90; a = 0.05) were obtained for the relation of microalgae concentration and survival, growth rate and the variation of average lenght. The mínimum cellular concentration of microalgae which is necessary for brine shrimp culture ¡s 5.6 x 105 cells/ml
Tipo: Journal Contribution
Palavras-chave: Density; Food; Growth rate; Food; Density; Growth rate; Http://aims.fao.org/aos/agrovoc/c_9001003; Http://aims.fao.org/aos/agrovoc/c_2186; Http://aims.fao.org/aos/agrovoc/c_16130.
Ano: 1994
URL: http://hdl.handle.net/1834/3771

Crecimiento y rendimiento en carne del Lenguado Paralichthys orbignyanus (Valenciennes, 1839) cultivado en Argentina
Provedor de dados: 20
Autores: Müller, M.I.; Radonic, M.; López, A.V.; Bambill, G.A.
The results of the final on-growing (500 g to 1 kg)of flounder Paralichthys orbignyanus under closed recirculated water systems and controlled conditions are presented. 22.5 percent of fish reached 1 kg alter 2.1 months of starting the on-growing trial. Sex ratio was 20.6 percent females and 79.4 percent males. Average length for females and males was 38.53 ± 4.58 cm TL and 32.52 ± 5.25 cm TL, respectively. Average body weight for females and males was 710.58 ± 262.95 g and 427.59 ± 203.01 g, respectively. Statistically significant differences were found for average length for sex (p0.01)and for average body weight for sex (0.01 0.05). Flesh yield was 43.1percent fillets without skin and 57percent fillets with skin. Flesh of cultivated flounder had a...
Tipo: Proceedings Paper
Palavras-chave: Fish culture; Marine fish; Growth rate; Feeding; Fish culture; Feeding; Growth rate; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_16130.
Ano: 2006
URL: http://hdl.handle.net/1834/1570

Pesca de la flota arrastrera camaronera en Esmeraldas-Ecuador durante el 2008
Provedor de dados: 20
Autores: García-Sáez, R.; Mendívez, W.; Chicaiza, D.
De enero a diciembre de 2008 la flota arrastrera camaronera de Esmeraldas desembarcó un total de 322,3 t, el cual representó un decremento del 21.3 % con relación al 2007. Para la obtención de esta información se utilizó encuestas pesqueras (zonas y días efectivos de pesca, desembarques etc.) y biológicas (sexo, estadio gonadal y talla). La flota activa promedio estuvo compuesta por 19 barcos arrastreros camaroneros. La principal especie desembarcada fue el camarón café (Farfantepenaeus californiensis) la cual presentó un rango de tallas de captura entre 12,0 y 20,5 cm (LT), seguido del camarón rojo (F. brevirostris). En esta zona se registró un predominio de individuos hembras en estadio vacía e inmadura.
Tipo: Journal Contribution
Palavras-chave: Trawlers; Landing statistics; Sexual maturity; Growth rate; Shrimp fisheries; Prawn fisheries.
Ano: 2009
URL: http://hdl.handle.net/1834/4783

Primeras observaciones sobre el crecimiento de Bagre negro (Rhamdia sapo)
Provedor de dados: 20
Autores: Varela, Zoel; Fischer, Knud; Chediak, Gustavo.
Se describen las primeras experiencias llevadas a cabo con el fin de determinar tasas de crecimiento del bagre negro (Rhamdia sapo) en condiciones de cultivo. En una primera experiencia se sembraron alevines (10 - 50 g) a densidades entre 25.000 y 60.000 ejemplares por hectárea, densidades normalmente empleadas para las últimas fases de alevinaje. Se estableció la relación entre el tamaño inicial y la tasa específica de crecimiento (TEC) así como también se determinó el crecimiento diario absoluto para los distintos tamaños. En una segunda experiencia se sembraron peces (112 g) a densidades de 6.000, 8.000 y 10.000 ejemplares por hectárea para realizar pruebas de producción. Esta experiencia se llevó a cabo en las estaciones de otoño e invierno. El...
Tipo: Report
Palavras-chave: Growth rate; Fish culture; Freshwater aquaculture; Feed conversion rate.
Ano: 1982
URL: http://hdl.handle.net/1834/4914

Aspectos biológicos y pesqueros de los principales peces del sistema hídrico de la provincia de Los Ríos, durante 2009
Provedor de dados: 20
Autores: Revelo, W.
Durante el 2009 (excepto mayo, agosto y septiembre), se analizaron un total de 3 772 especímenes de peces conformados por 16 especies, predominando la dica con 1561 individuos (42,3%), las menos capturadas fueron róbalo y chame con un individuo  cada una (0,03%). La proporción de sexo macho hembra, talla promedio de captura y media de madurez sexual de las principales especies de peces fue: dama (1: 1,16; 23,7  y 20 cm LT), dica (1: 1,15; 17,3 y 16 cm LT), guanchiche (1: 1,2; 29 y 20 cm LT), ratón (1: 1,25; 23,5 y 19 cm LT) y  bocachico (1:1,06; 21,6 y 20 cm LT). En los estadios de madurez sexual, la mayoría de las especies se encontraron en estadio I y II correspondientes a individuos hembras inmaduras; sin embargo, para el guanchiche predominaron las...
Tipo: Journal Contribution
Palavras-chave: Rivers; Species diversity; Sexual maturity; Growth rate; Catch composition; Freshwater fish.
Ano: 2010
URL: http://hdl.handle.net/1834/4790

Capacité de l'espace côtier face a la croissance des usages : problèmes et strategies
Provedor de dados: 20
Autores: Blivi, A.B.
En Afrique de l'Ouest, particulièrement dans le golfe du Bénin, les grandes villes, Accra, Lomé, Cotonou, Lagos se localisent dans la zone côtière de cordons assez étroits associés à des milieux lagunaires et de vasières relativement importants.  Les progrès de modernisation y sont marqués par les installations d'industries de tout genre autour des ports, par le développement des zones d'habitats de caractère formel et  informel dû à la croissance de la population et par les nombreuses activités économiques.  Cette dynamique se poursuit dans la zone côtière qui continue d'être utilisée presque sans programme de planification et de développement. Les nombreuses ressources socio-économiques évoluent rapidement et attestent le dépassement des possibilités...
Tipo: Journal Contribution
Palavras-chave: Growth rate; Harbours Coastal zone Population number Population dynamics Population dynamics http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 1999
URL: http://hdl.handle.net/1834/1238

Madurez reproductiva y crecimiento del pulpito tehuelche Octopus tehuelchus en distintos sectores del Golfo San Matías
Provedor de dados: 20
Autores: Storero, L.P.; Ocampo Reinaldo, M.; Narvarte, M.A.
En el informe se presenta la evolución de la madurez reproductiva a lo largo de un ciclo anual y se realiza un análisis preliminar del crecimiento del pulpito tehuelche en distintos sectores del Golfo San Matías. La información se recolectó entre 2005 y 2007 en los sitios El Fuerte, Islote Lobos y Bahía de San Antonio. Se observan diferencias en el periodo de madurez entre los sitios. El crecimiento del pulpito muestra una marcada estacionalidad con crecimiento lento durante el invierno. Además, no se observan diferencias en el crecimiento entre sexos pero si entre los sitios analizados. Se sugieren medidas de manejo para los sitios explotados artesanalmente
Tipo: Report
Palavras-chave: Reproduction; Growth rate; Sexual maturity; Artisanal fishing; Reproduction; Growth rate.
Ano: 2008
URL: http://hdl.handle.net/1834/4383

The influence of light on the growth rate of larvae of the brine shrimp, &lt;i&gt;Artemia salina&lt;/i&gt; L.
Provedor de dados: 27
Autores: Sorgeloos, P.
&lt;i&gt;Artemia salina&lt;/i&gt; L. larvae grown in complete darkness showed a significant higher growth rate than those cultured under continuous illumination.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth rate; Larvae; Light effects; Artemia salina.
Ano: 1972
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3458

Growth and biomass allocation of the C4 grasses Brachiaria brizantha and B. humidicola under shade
Provedor de dados: 86
Autores: DIAS-FILHO,MOACYR BERNARDINO.
The growth and biomass allocation responses of the tropical forage grasses Brachiaria brizantha cv. Marandu and B. humidicola were compared for plants grown outdoors, in pots, in full sunlight and those shaded to 30% of full sunlight over a 30day period. The objective was to evaluate the acclimation capacity of these species to low light. Both species were able to quickly develop phenotypic adjustments in response to low light. Specific leaf area and leaf area ratio were higher for low-light plants during the entire experimental period. Low-light plants allocated significantly less biomass to root and more to leaf tissue than high-light plants. However, the biomass allocation pattern to culms was different for the two species under low light: it increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Specific leaf area; Growth rate; Pastures; Light regimes.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000001200003

Physiological and morphological responces of Brachiaria spp. to flooding
Provedor de dados: 86
Autores: DIAS-FILHO,MOACYR BERNARDINO; CARVALHO,CLÁUDIO JOSÉ REIS DE.
The physiological and morphological responses of the forage grasses Brachiaria brizantha cv. Marandu, B. decumbens and B. humidicola were compared for plants grown in pots under flooding and well-drained conditions for 14 days. Flooding reduced specific leaf area and biomass allocation to roots in all species and enhanced leaf senescence in B. brizantha and B. decumbens. Relative growth rate was reduced by flooding in B. brizantha and B. decumbens, but not in B. humidicola.Leaf elongation rate was unaffected by flooding in B. decumbens and B. humidicola, but declined in B. brizantha since the first day of flooding. Net photosynthesis and leaf chlorophyll content were reduced by flooding in B. brizantha; however, no flooding effect could be detected in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria brizantha; Brachiaria decumbens; Brachiaria humidicola; Leaf area; Chlorophyll; Photosynthesis; Biomass; Growth rate.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000001000006

Growth of champa fruit under agroecological conditions of Miraflores, Boyacá, Colombia
Provedor de dados: 86
Autores: Balaguera-López,Helber Enrique; Arévalo,Aníbal Herrera; Cortés-Moreno,Daniel.
The objective of this work was to analyze the growth of champa fruit (Campomanesia lineatifolia) as a function of growing-degree days (GDD) in the municipality of Miraflores, in Boyacá, Colombia. Thirty trees were selected at random, and 100 flowers in full bloom were marked in each tree. From the 26th day after flowering until harvest, 10 samples were taken every 15 days to determine the fruit parameters and growth rate. Temperature was recorded to calculate the GDD. From flowering until harvest, 1,489.1 GDD were accumulated over 145 days. Dry and fresh matter mass of pulp, seed, and total fruit were fitted to a logistic growth model, and three growth stages (S1, S2 and S3) were defined. In the S1, growth was slow, and the relative growth remained nearly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Myrtaceae; Growth rate; Tropical fruits.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001200007

Infrared thermometry to schedule irrigation of common bean
Provedor de dados: 86
Autores: Lobo,Francisco de Almeida; Oliva,Marco Antonio; Resende,Morethson; Lopes,Nei Fernandes; Maestri,Moacyr.
The objective of this work was to determine the critical irrigation time for common bean (Phaseolus vulgaris L. cv. Carioca) using infrared thermometry. Five treatments were analyzed. Canopy temperature differences between plants and a well-watered control about 1, 2, 3, 4, and 5±0.5ºC were tested. Physiological variables and plant growth were analyzed to establish the best time to irrigate. There was a significant linear correlation between the index and stomatal resistance, transpiration rate, and leaf water potential. Although significant linear correlation between the index and mean values of total dry matter, absolute growth rate, and leaf area index was found, no correlation was found with other growth index like relative growth rate, net...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Irrigation scheduling; Water use efficiency; Growth rate.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000200003

Tolerance to flooding in five Brachiaria brizantha accessions
Provedor de dados: 86
Autores: Dias-Filho,Moacyr Bernardino.
Some physiological and morphological responses of five Brachiaria brizantha accessions (BRA000591 cultivar Marandu, BRA003441, BRA002844, BRA004308 and BRA004391) were compared for plants grown in pots under flooding and well-drained conditions for 14 days. Flooding caused a significant reduction in leaf dry mass production in all accessions, but, for root biomass, no differences between treatments could be detected in BRA003441 and BRA004391. No adventitious root production was observed in flooded BRA003441; all other accessions produced adventitious roots when flooded. Relative growth rate was reduced by flooding only in BRA000591 and BRA004308. Leaf elongation rate was reduced by flooding in all accessions, however, more severely in BRA003441. Net...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adventitious roots; Photosynthesis; Forage grasses; Biomass allocation; Growth rate.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002000400003

Growth and hematology of pacu subjected to sustained swimming and fed different protein levels
Provedor de dados: 86
Autores: Nunes,Cleujosí da Silva; Moraes,Gilberto; Fabrizzi,Fernando; Hackbarth,Araceli; Arbeláez-Rojas,Gustavo Alberto.
The objective of this work was to evaluate the effect of sustained swimming and dietary protein levels on growth and hematological responses of juvenile pacu (Piaractus mesopotamicus). A completely randomized design was used in a 3x2 factorial arrangement, with three levels of dietary protein (24, 28, and 32% crude protein), two rearing conditions (sustained swimming or motionless water), and 15 replicates. Fish were subjected to sustained swimming at the velocity of two body lengths per second (2 BL s-1), for 45 days. The level of dietary protein and the swimming conditions affected the performance, growth, and hematological profile of pacu. Swimming conditions influenced nutritional factors, increasing daily weight gain, specific growth rate, number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piaractus mesopotamicus; Erythropoiesis; Exercise; Growth rate; Weight gain.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000600010

Developing decision-making tools for improving pasture quality on deer farms in New Zealand
Provedor de dados: 31
Autores: Stevens,   David R.; Woodward,   Simon J.R.; Westbrooke,   Victoria F.C.
This paper describes the development of a learning package to support improved pasture quality on New Zealand deer farms. The first step has been to determine the specific requirements of deer farmers that will enable them to improve pasture quality decisions on-farm. Decision support software that interprets and demonstrates the impacts of pasture quality and animal physiology on the performance of young growing deer has also been developed. Key themes identified to aid pasture management decision-making included identifying the right pasture quality, management systems to maintain pasture quality and maximising the potential of livestock. This paper reports on the type of knowledge that deer farmers require in the learning package.
Tipo: Article
Palavras-chave: Decision making; Deer; Growth rate; Learning packages; Pasture quality; Software; Farm Management.
Ano: 2005
URL: http://purl.umn.edu/123143

Monostromatic green algae (Ulvales, Chlorophyta) of São Paulo and Paraná states (Brazil): distribution, growth, and reproduction
Provedor de dados: 88
Autores: Braga,Maria do Rosário de A.; Fujii,Mutue T.; Cordeiro-Marino,Marilza.
(Monostromatic green algae (Ulvales, Chlorophyta) of São Paulo and Paraná states (Brazil): distribution, growth, and reproduction). Culture studies were used for taxa identification and to understand aspects of the biology and physiology of monostromatic green blades growing in various sites along the coast of São Paulo state (23º30'-25ºl2'S, 45º10'-48ºW) and one site in Paraná state (25º35'S, 48º21'W), southeast and south Brazil, respectively. Possible variations of the growth rate, age of reproduction and life history were tested under different conditions of temperature, salinity and day length. Two species were found: Ulvaria oxysperma (Kützing) Bliding and Monostroma sp. The first one has been previously reported for many temperate and tropical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ulvaria; Monostroma; Growth rate; Reproduction.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041997000200010

Effects of Different Amounts of Blue Lupine (L. Angustifolius L.) in The Diets of Heavy-Type Turkeys on Their Growth Rate, Carcass and Meat Qualities
Provedor de dados: 89
Autores: Juodka,R; Nainiene,R; Juskiene,V; Juska,R; Stuoge,I; Leikus,R.
ABSTRACT A study was carried out to determine the effects of soybean meal replacement with different amounts of blue lupine in the diets of turkeys on the growth rate, anatomic carcass dissection data, chemical indicators of breast and thigh muscles and the content of tryptophan and oxyprolin. In total three hundred and sixty cross BIG-6 turkeys were allotted to two control and ten experimental groups of 30 one-day-old turkeys. The control group of turkeys was fed the diet containing soybean meal, whereas the trial groups were offered different amounts (from 20 to 30%) of lupines. Group 4 and 5 were additionally given probiotic mixture Bio Plus 2B and allzyme SSF, respectively. Soybean oil replacement from 20 to 30% lupine in the diet had no influence on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomic carcass dissection data; Chemical indicators; Growth rate; Lupine; Turkey.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000500117

Growth and deposition of body components of intermediate and high performance broilers
Provedor de dados: 89
Autores: Henn,JD; Bockor,L; Ribeiro,AML; Coldebella,A; Kessler,A de M.
The objectives of the present study were to determine the parameters of Gompertz equations and to determine curves and growth rate, feed intake and body component deposition, as well as allometric coefficients of body water, protein, and fat relative to live weight of male and female broilers of intermediate performance (C44) and high performance (Cobb-500) genetic strains. In total, 384 one-d-old chicks were distributed into four treatments: male Cobb 500, male C44, female Cobb 500, and female C44, with six replicates of 16 birds, according to a completely randomized experimental design. Average body weight, weight gain, and feed intake were weekly determined, and six birds, representing the average weight of each treatment, were sacrificed to determine...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body composition; Gompertz curve; Growth rate; Cobb 500; C44.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300014

Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures
Provedor de dados: 103
Autores: Richardi,Vinicius S.; Rebechi,Débora; Aranha,José M. R.; Navarro-Silva,Mário A.
Determining the age composition of a population is important when conducting ecological, taxonomic and environmental assessments. Morphometric measurements of the head capsule, especially the length and width, are widely used in the identification of insect instars, but alternative ways for determining the age of insects can expand the options for the analysis of field and laboratory populations. This study evaluated the morphometry of the antennae, mandibles, mentum and ventromental plates to discriminate among the four larval instars of Chironomus sancticaroli Strixino &amp;amp; Strixino, 1981. The larvae were reared in the laboratory under constant temperature (25°C) and photoperiod of 12/12 hours for 19 days, with a supply of food. Fifteen larvae were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth rate; Head capsule; Instars; Morphometry.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200011

Reproductive cycle of Branchiura sowerbyi (Oligochaeta: Naididae: Tubificinae) cultivated under laboratory conditions
Provedor de dados: 103
Autores: Lobo,Haroldo; Alves,Roberto da Gama.
The biology of Branchiura sowerbyi Beddard, 1892 has been the focus of many studies in temperate regions, where the species is exotic, according to literature data. Due to its high productivity and easy cultivation, B. sowerbyi is of great interest as a food source for fish farming. The present study reports information on the reproductive biology and growth of B. sowerbyi under laboratory conditions at 25 ± 1ºC. Weekly observations during 52 weeks indicated that the time between cocoon laying and young hatching was 14 to 16 days, the specific daily growth rate was 0.91 ± 0.04% (mean ± SD) and the time to reach sexual maturity was 40.83 ± 6.88 days. As reported by other authors, the hatching rate observed was low (33.08%), but the survival rate of young...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cocoons; Fish food; Growth rate; Oligochaete; Tubificid.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400003

Animal production and canopy attributes of Cynodon pasture managed under continuous stocking with wethers at three levels of forage allowance
Provedor de dados: 96
Autores: Santos,Márcia Vendrúsculo dos; Kozloski,Gilberto Vilmar; Quadros,Fernando Luiz Ferreira de; Pires,Cleber Cassol; Wommer,Tatiana Pfüller; Mônego,Camila Ornelas.
The objective of the present experiment was to evaluate the effect of forage allowance (3, 6 or 9 kg of green leaves dry matter (DM)/100 kg of body weight (BW)) on both animal performance and attributes of Cynodon dactylon var.dactylon canopy managed under continuous stocking by wethers. The study was carried out with 27 Polwarth wethers throughout five 28-day periods, in a completely randomized experiment, which included three paddocks per treatment and three tester animals per paddock. Forage mass varied from 2878 to 6580 kg of DM/ha and was directly related to forage allowance. Leaves proportion (mean of 23%) and leaves growth rate (mean of 25 kg of DM/ha/day) varied between experimental periods in a similar rate for all treatments. Stocking rate varied...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cynodon dactylon var. dactylon; Growth rate; Intake; Live weight gain; Sheep; Tropical grass.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100026

Sphagnum magellanicum growth and productivity in Chilean anthropogenic peatlands
Provedor de dados: 97
Autores: DÍAZ,MARÍA F; TAPIA,CAROLINA; JIMÉNEZ,PATRICIA; BACIGALUPE,LEONARDO.
Sphagnum peatlands are threatened at a global scale, not only by peat extraction, but also by Sphagnum harvesting. In Chile, dry Sphagnum moss is mainly exported for use as substrate for horticulture and orchids. Although the use of Sphagnum within Chile is limited, there are no data about its productivity and growth. These peatlands have a special microtopography with hummocks, hollows and lawns, which vary the distance of moss to the water table level. In these ecosystems, the water table is almost all year near the surface. We measured cumulative and relative growth rates and productivity during approximately one annual cycle in private Sphagnum peatlands that are being yearly harvested for commercial purposes. We evaluated the relationship between...
Tipo: Journal article
Palavras-chave: Chile; Growth rate; Peatland; Sphagnum moss.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000400013

Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia
Provedor de dados: 124
Autores: Amancio,Alda Lúcia de Lima; Silva,José Humberto Vilar da; Fernandes,João Batista Kochenborger; Sakomura,Nilva Kazue; Cruz,George Rodrigo Beltrão da.
The objective of this study was to evaluate the accuracy of five mathematical models (Gompertz, Logistic, Linear Hyperbolic, Quadratic and Quadratic Logarithmic) to describe the growth curve of GIFT strain Nile tilapia, Oreochromis niloticus, and to characterize the growth trajectory of body parts. To do this, 1,000 fingerlings, with an initial weight of 2.4 g were placed into 20 brick tanks of 2 m³ each, at a density of 25 fish m-3, for 180 days. The animals were fed daily, using the protein levels and number of meals appropriate to each stage. Every two weeks 20 fish were randomly sampled, submitted to a fasting period of 48 h and then slaughtered by thermal shock, in order to determine the weight of the whole fish, the skin without scales, skinless...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oreochromis niloticus; Growth curve; Gompertz; Growth rate.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200005

การใช้โซเดียมไฮดรอกไซด์ปรับปรุงคุณภาพชานอ้อย เพื่อเป็นอาหารในโคนมรุ่น
Provedor de dados: 106
Autores: Natthapong Morthong; Virote Pattarajinda; Pornchai Lowilai; Siwat Sangsritavong.
The objective of this study was to determine effect of using treated sugarcane bagasse as roughage source of TMR on the utilization of nutrients and performance of dairy heifers. Twelve crossbred 98% HF blood heifers (175±20 kg.BW) was assigned to randomized completed block design (RCBD) The treatments were following as different NaOH level of treated sugarcane bagasse 0, 2, 4 and 6% and all of TMR was formulated to similar TDN and CP (65% and 12.5%). The results showed that the heifers fed treated sugarcane bagasse quality with 4% NaOH had better DMI, DMIBW and FCR than others, especially, the highest ADG in 4% (P&lt;0.01). It is therefore can be concluded that the optimal level of NaOH to enhance treated sugarcane bagasse was 4% would improve growth rate...
Tipo: PhysicalObject
Palavras-chave: Dairy heifers; Treated sugarcane bagasse; Roughage; Feed quality; Sodium hydroxide; Feed efficiency performance; Growth rate; Nutrient improvement; โคนมรุ่น; ชานอ้อย; อาหารหยาบ; คุณภาพอาหารสัตว์; การปรับปรุงคุณภาพ; โซเดียมไฮดรอกไซด์; การย่อยอาหาร; ประสิทธิภาพอาหารสัตว์; คุณค่าทางโภชนะ; สมรรถนะการผลิต; อัตราการเจริญเติบโต.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5773

ผลของการใช้แบคทีเรียกรดแลคติกในน้ำพืชหมักเป็นสารโพรไบโอติกต่อจุลินทรีย์ในไก่เนื้อ
Provedor de dados: 106
Autores: Smerjai Bureenok; Kraisit Vasupen; Kessara Ampaporn; Benya Seanmhayak.
A study on the potential of Lactobacillus plantarum ST1and dried fermented juice of epiphytic lactic acid bacteria (DFJLB) as probiotics was conducted with 200 broilers (1-day old). On four treatments were control (basal diet), antibiotic (basal diet + 0.05% OTC) and 0.2% DLABand1.0% DFJLB with basal diet. The birds were arranged in a Completely Randomized Design, 5 replications with 10 chicks per replication in cage. All treatments were not significant difference on growth and feed conversion efficiency in broilers(P&lt;0.05). Significantly, lowest E. coli counts in feces fed Lactobacillus plantarumST1 and DFJLB were recorded compared to control and antibiotic (P&lt;0.05). Lactic acid bacteria counts in cecum significantly reduced in control compared to...
Tipo: PhysicalObject
Palavras-chave: Broiler chicken; Fermented juice; Animal feeding; Microflora; Lactobacillus plantarum; Lactic acid bacteria; Probiotic; Antibiotic; Growth rate; Broiler production; ไก่เนื้อ; การให้อาหารสัตว์; จุลินทรีย์; แบคทีเรียกรดแลคติก; สารโพรไบโอติก; น้ำพืชหมัก; ประสิทธิภาพอาหารสัตว์; คุณค่าทางโภชนะ; ระบบทางเดินอาหาร; การป้องกันเชื้อก่อโรค; สารปฏิชีวนะ; การเจริญเติบโต; การผลิตไก่เนื้อ.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5761

ผลของเอนไซม์ย่อยเยื่อใยที่ใช้กากมะเขือเทศเป็นแหล่งเยื่อใย ต่อคุณภาพซากในไก่งวง
Provedor de dados: 106
Autores: Kessara Ampaporn; Smerjai Bureenok; Kraisit Vasupen; Chalermpon Yuangklang; Benya Seanmahayak.
In this study, the influence of fibrolytic enzymes in diet contained tomato pomace as a fiber sources on carcass quality of 2 month old turkeys was assessed. A total of 24 birds were arranged in a completely randomized design (CRD). The birds were assigned to 4 dietary treatments: control diet (T1), control diet + 0.2% of fibrolytic enzymes (T2), control diet + 10% of tomato pomace (T3), and control diet + 0.2% of fibrolytic enzymes + 10% of tomato pomace (T4). The results were shown that the carcass quality and breast weight of all groups were no t difference (P&gt;0.05). For meat color, the redness color (a* value) and yellowness color (b* value) of breast were higher in birds fed control diet + 10% of tomato pomace (T3) and control diet + 0.2% of...
Tipo: PhysicalObject
Palavras-chave: Turkeys; Tomato pomace; Animal feeding; Supplementation; Fiber source; Protein source; Control diet; Digestion; Fibrolytic enzymes; Growth rate; Carcass quality; ไก่งวง; กากมะเขื่อเทศ; อาหารสัตว์; อาหารเสริม; วัตถุดิบอาหารสัตว์; แหล่งเยื่อใยในอาหาร; แหล่งโปรตีน; คุณค่าทางโภชนะ; การย่อยอาหาร; เอนไซม์ย่อยเยื่อใย; สมรรถภาพการผลิต; คุณภาพซาก.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5764

ผลของ 17 beta-estradiol ต่อการเปลี่ยนเพศปลาหมอไทยระยะไข่ โดยวิธีการแช่
Provedor de dados: 106
Autores: Phonesack Matthavong; Siripavee Charoenwattanasak; Bundit Yuangsoi; Sutee Wongmaneeprateep.
The effect of 17β-estradiol on sex reversal of climbing perch (Anabas testudineus) egg phase by immersion method were studied. The fish eggs were immersed with 17β-estradiol at the level of 0 (control group), 50, 100, 150 and 200 μg/l in fiberglass tanks containing 5 L freshwater for 4 days. Five hundred eggs were used for each treatment with the experiments being done in 4 replicate. After hatching, hatching rates of the fish were not significantly different regardless of levels 17β-estradiol. Initial length and weight of the fish were measured at the beginning of the experiment. After nursing for 56 days in suitable condition, sex reversal rate, length gain, weight gain, average daily growth, specific growth rate and survival rate of the fishes were...
Tipo: PhysicalObject
Palavras-chave: Climbing perch; Anabas testudineus; Egg phase; Sex reversal; 17 beta-estradiol; Hormones; Immersion method; Growth rate; Survival rate; Sex differentiation; ปลาหมอไทย; ระยะไข่; อัตราการเปลี่ยนเพศ; เพศเมีย; ฮอร์โมน 17 เบต้า-เอสตาไดออล; การแช่ไข่ปลา; อัตราการเจริญเติบโต; อัตราการฟัก; อัตราการรอดตาย; ลักษณะของเซลล์สืบพันธุ์; การเพิ่มผลผลิต; การเปลี่ยนสภาพเพศ.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5799

Effect of environment on photosynthesis by corn
Provedor de dados: 106
Autores: Musgrave, R.B.
6 ill.
Palavras-chave: Corn; Maize; Photosynthesis; Environment; Growth rate; ข้าวโพด; การสังเคราะห์แสง; อัตราการเจริญเติบโต.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3743

การศึกษาการตอบสนองทางสรีรวิทยาของข้าวโพดเลี้ยงสัตว์ต่อสภาวะน้ำท่วมขังระยะสั้น
Provedor de dados: 106
Autores: Peerasak Chaiprasart; Makawat Pasitwilitum; Somchai Boonpradub.
Palavras-chave: Corn; Maize; Water logging; Growth rate; Dry weight; Anthesis silking interval; Chlorophyll content; ข้าวโพด; ข้าวโพดเลี้ยงสัตว์; สภาวะน้ำท่วมขัง; ระยะสั้น; การตอบสนองทางสรีรวิทยา.
Ano: 2003
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4535

Nestling development of the tropical screech-owl ( Megascops choliba ): a successful case report from the southwestern Amazon
Provedor de dados: 36
Autores: GUILHERME,Edson; SOUZA,Izabele Rodrigues de.
ABSTRACT This study reports a successful reproductive event in Megascops choliba in eastern Acre, northern Brazil. An active M. choliba nest was monitored from the hatching of the eggs to the departure of the nestlings. Once hatched, the nestlings were weighed every two days to verify their weight gain over time. The nestlings remained in the nest for 30 days. The pattern of weight gain was similar to that found in other birds, presenting a rapid increase over the first 15 days, followed by a drastic reduction in the mean growth rate during the second half of the development period. Our observations indicate that the breeding season of M. choliba in southwestern Amazonia is similar as that reported for the species in the northern hemisphere. These are the...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Birds; Strigidae; Growth rate; Nest; State of Acre; Brazil.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000300269

Growth curves of Nile tilapia (Oreochromis niloticus) strains cultivated at different temperatures - doi: 10.4025/actascianimsci.v35i3.19443
Provedor de dados: 2
Autores: Santos, Vander Bruno; Apta -Agencia de Tecnologia dos Agronegócios; Mareco, Edson Assunção; Universidade Estadual Paulista; Silva, Maeli Dal Pai; Instituto de Biociências, UNESP. Botucatu.
Growth of Red, GIFT and Supreme Nile tilapia strains were evaluated. Fish were cultivated in indoor recirculation systems in 0.5 m³ tanks with controlled temperatures of 22, 28 and 30°C. Random samples of 20 fish from each strain (10 fish tank-1) were weighed at day 7, 30, 60, 90 and 120. Exponential model (y=AeKx) and Gompertz model (y = Aexp(-Be-Kx)) were fitted and the estimates parameters were obtained by Weighted Least Squares. At 22°C, Red, GIFT and Supreme strain presented similar growth and fit of exponential model. GIFT and Supreme strain presented higher growth rate at 30°C of cultivation when compared to Red strain. Temperature influences weight and age at the inflection point. The temperature of cultivation influences the growth description of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 50603000 exponential model; Growth rate; Supreme; GIFT; Red tilapia; Weighted model Exponential model; Growth rate; Supreme; GIFT; Red tilapia; Weighted model.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/19443

Growth of the tropical zoanthid Palythoa caribaeorum (Cnidaria: Anthozoa) on reefs in northeastern Brazil
Provedor de dados: 42
Autores: SILVA,JANINE F.; GOMES,PAULA B.; SANTANA,ERIKA C.; SILVA,JOÃO M.; LIMA,ÉRICA P.; SANTOS,ANDRE M.M.; PÉREZ,CARLOS D.
In Brazilian reefs, zoanthids, especially Palythoa caribaeorum are fundamental for structuring the local benthic community. The objective of this study was to determine the growth rate of P. caribaeorum, and to assess the influence of the site (different beaches), season (dry and wet), location (intertidal or infralittoral zones), and human pressure associated with tourism. For one year we monitored the cover of P. caribaeorum in transects and focused on 20 colonies. We cut off a square (100 cm2) from the central part of the colony and monitored the bare area for four months in each season. The average growth rates varied from 0.015 and 0.021 cm.day-1. The rate was homogeneous in all localities, and there was no influence from colony site, location, or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth rate; Trampling; Tropical reefs; Zoantharia.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200985

Influence of temperature and conductivity on the life-history characteristics of a pampean strain of Brachionus plicatilis
Provedor de dados: 42
Autores: FERRANDO,NOELIA S.; CLAPS,MARÍA C.; BENÍTEZ,HERNÁN H.; GABELLONE,NÉSTOR A.
ABSTRACT In the present work, we provide the first approach about the life-history of Brachionus plicatilis in South America. We tested with laboratory experiments the response of the pampean strain of B. plicatilis for two of its main stressors (conductivity and temperature). We evaluated the effects of eight conductivity values from 1 to 17 mS.cm-1 and two temperatures (15 and 25 °C) to compare its abundance with those obtained in the pampean lotic and lentic environments, where this rotifer is frequent or dominant. The results demonstrated that the increase in population-growth rate and the peak of abundance occurred at the highest temperature and at medium conductivity. Minimum values were obtained at the lowest temperature and conductivities analyzed,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euryhaline rotifer; Experimental cultures; Growth rate; Salinity; Temperature.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401431

Growth curve of female collared peccaries (Pecari tajacu) raised in captivity in the Brazilian Amazon Region
Provedor de dados: 45
Autores: Garnero,A.D.V.; Marcondes,C.R.; Albuquerque,N.I.; Araújo,R.O.; Pendu,Y.; Guimarães,D.A.
This work aims to determine the most suitable nonlinear model to describe the growth of female collared peccaries (Pecari tajacu). The monthly records of the weight of 10 captive female collared peccaries over a period of two years in the Brazilian Amazon Region were used. The growth models used were the Von Bertalanffy, Brody, Gompertz and Logistic. The parameters were estimated by using the NLIN procedure from the SAS application. The criteria used to verify the adjustment of the models were: asymptotic standard deviation (ASD); coefficient of determination (R²); average absolute residual deviation (ARD) and the asymptotic rate (AR). The Brody model and the Logistic model estimated the highest (19.44kg) and the lowest (19.18kg) asymptotic weight (A),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nonlinear models; Asymptotic weight; Growth rate.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000400004

Performance of Soybean Seedlings Upon Nutrient Application by Seed Coating
Provedor de dados: 52
Autores: Rufino,Cassyo de Araújo; Tavares,Lizandro Ciciliano; Martín-Ramos,Pablo; Fernandes-Vieira,Jucilayne; Abreu Júnior,José de Souza; Silva,Fábio Júnior Araújo; Fernandes-Correa,Marciabela; Martín-Gil,Jesús.
ABSTRACT The aim of this study was to evaluate the effect of different seed coatings consisting of various combinations of three nutrients (calcium, magnesium and silicon) on two soybean cultivars (BRS 243 RR and CD 233 RR). Dolomitic limestone and aluminum silicate were chosen as the nutrient sources. Leaf area, plant height, shoots dry matter, crop growth rate, relative growth rate and net assimilation rate were the studied variables, evincing that the seed coating that comprised calcium, magnesium and silicon led to better performance in terms of growth rates 30 days after emergence. Significant differences in the response to the seed coatings were also observed between the two studied soybean genotypes.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max (L.) Merr.; Growth rate; Leaf area; Micronutrients; Seed treatment.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100500

Phylogenetic analysis of the emergence of main hepatitis C virus subtypes in São Paulo, Brazil
Provedor de dados: 55
Autores: Nishiya,Anna Shoko; Almeida-Neto,César de; Romano,Camila Malta; Alencar,Cecília Salete; Ferreira,Suzete Cleusa; Di-Lorenzo-Oliveira,Claudia; Levi,José Eduardo; Salles,Nanci Alves; Mendrone-Junior,Alfredo; Sabino,Ester Cerdeira.
ABSTRACTBACKGROUND: It is recognized that hepatitis C virus subtypes (1a, 1b, 2a, 2b, 2c and 3a) originated in Africa and Asia and spread worldwide exponentially during the Second World War (1940) through the transfusion of contaminated blood products, invasive medical and dental procedures, and intravenous drug use. The entry of hepatitis C virus subtypes into different regions occurred at distinct times, presenting exponential growth rates of larger or smaller spread. Our study estimated the growth and spread of the most prevalent subtypes currently circulating in São Paulo.METHODS:A total of 465 non-structural region 5B sequences of hepatitis C virus covering a 14-year time-span were used to reconstruct the population history and estimate the population...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth rate; HCV; Phylogenetic analysis; Subtypes.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000500473

Changes in growth variables and potassium content in leaves of Black Barley in response to NaCl
Provedor de dados: 61
Autores: Abu-Al-Basal,Mariam A.; Yasseen,Bassam T.
Much attention is being focused on the Black barley (Hordeum distichum L.) as a local cultivar offering good model for a cereal crop has traits of resistance to drought and salinity during vegetative growth stages. Although Black was sensitive to salt stress during germination, it developed gradual tolerance with age and proved very tolerant during growth and development stages. The data of study clearly revealed how this cultivar was superior over Arivat (Hordeum vulgare L.) in many physiological aspects such as leaf growth variables (i.e. rate and duration) and processes (i.e. cell division), tiller production and potassium content. Black barley had more tillers, faster rate and longer duration of growth processes which was accompanied with potassium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Black barley; Hordeum distichum L.; Cell division; Growth rate; Growth duration; Leaf growth; Arivat; Hordeum vulgare L.; Potassium; Salt stress.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000400002

Soil drying and rewatering applied at three grain developmental stages affect differentially growth and grain protein deposition in wheat (Triticum aestivum L.)
Provedor de dados: 61
Autores: Beltrano,José; Ronco,Marta Guillermina; Arango,María Cecilia.
Water deficits cause large yield losses in wheat. Although anthesis is generally considered the most vulnerable period, water deficit during grain filling can also cause yield losses. The objective of this study was to investigate the effect of water stress and rewatering, at three different grain developmental stages, on physiological and grain filling parameters and on yield components. Wheat plants were subjected to water deficit and rewatering at the watery ripe, milk and soft dough stages. In the flag leaf, water stress decreased the relative water content, the chlorophyll and protein content and increased the leakage of solutes, at all three studied grain filling stages. Water stress at the watery ripe and milk stages reduced the final grain dry mass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grain filling; Growth rate; Logistic model; Protein profile; Water stress.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200011

Nonlinear quantile regression to describe the dry matter accumulation of garlic plants
Provedor de dados: 65
Autores: Puiatti,Guilherme Alves; Cecon,Paulo Roberto; Nascimento,Moysés; Nascimento,Ana Carolina Campana; Carneiro,Antônio Policarpo Souza; Silva,Fabyano Fonseca e; Puiatti,Mário; Cruz,Cosme Damião.
ABSTRACT:  The objective of this study was to adjust nonlinear quantile regression models for the study of dry matter accumulation in garlic plants over time, and to compare them to models fitted by the ordinary least squares method. The total dry matter of nine garlic accessions belonging to the Vegetable Germplasm Bank of Universidade Federal de Viçosa (BGH/UFV) was measured in four stages (60, 90, 120 and 150 days after planting), and those values were used for the nonlinear regression models fitting. For each accession, there was an adjustment of one model of quantile regression (τ=0.5) and one based on the least squares method. The nonlinear regression model fitted was the Logistic. The Akaike Information Criterion was used to evaluate the goodness of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Quantile regression; Nonlinear regression; Allium sativum L.; Growth rate; Cluster analysis.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000100203

Growth in weight and of some tissues in the bullfrog: fitting nonlinear models during the fattening phase
Provedor de dados: 64
Autores: Pereira,Marcelo Maia; Mansano,Cleber Fernando Menegasso; Silva,Edney Pereira da; Stéfani,Marta Verardino De.
Knowledge of the growth of animals is important so that zootechnical activity can be more accurate and sustainable. The objective of this study was to describe the live weight, development of liver tissue and fat body, leg growth, and cumulative food intake of bullfrogs during the fattening phase using nonlinear models. A total of 2,375 bullfrog froglets with an initial weight of 7.03 ± 0.16 g were housed in five fattening pens (12 m²). Ten samplings were performed at intervals of 14 days to obtain the variables studied. These data were used to estimate the parameters of Gompertz and logistic models as a function of time. The estimated values of weight (Wm) and food intake (FIm) at maturity and time when the growth rate is maximum (t*) were closer to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Frog farming; Growth curves; Growth rate; Logistic model.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000600009

Phenology and biometry of physic nut in the brazilian savannah
Provedor de dados: 64
Autores: Gurgel,Fábio de Lima; Laviola,Bruno Galvêas; Silva,Daniel Medeiros da; Kobayashi,Adilson Kenji; Rosado,Tatiana Barbosa.
Phenological studies on three morphologically distinct accessions of physic nut (Jatropha curcas L.) were conducted in the Brazilian Savannah biome. Plant growth rate, flowering, fruit formation and development were measured in order to establish appropriate management practices for increasing productivity. The accessions CNPAE-102 (toxic and susceptible to powdery mildew), CNPAE-169 (non-toxic and susceptible to powdery mildew) and CNPAE-259 (toxic and resistant to powdery mildew) were studied. Accessions with undetectable levels of phorbol ester in the grains were considered as non-toxic. The agronomic variables (plant height, number of inflorescences, number of green and ripe fruits per plant) from each accession were measured biweekly during one year...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth rate; Flowering; Fruiting; Temperature.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600012