Consulta: subjectFacets:"Biomass"
Registros recuperados: 473
Data/hora: 09/06/2024 13:32:54

ENERGY CULTURES AND SUSTAINABILITY IN BIOFUEL PRODUCTION
Provedor de dados: 196
Autores: Mascarenhas Santos, Maria do Socorro; Silva, Cesar José da; Cruz, Sandra Helena da; Batistote, Margareth; Cardoso, Claudia Andrea Lima.
Energy cultures are emerging as viable renewable energy sources because they satisfy sustainability requirements. The present study involves a survey regarding the technological characteristics for sugarcane and sweet sorghum energy crops, in addition to their potential for bioethanol production. An exploratory survey was conducted regarding the agronomic and technological characteristics of cane and sorghum. Pre-inmates were produced with YPSAC 5% liquid medium, sterilized and 0.10 grams of yeasts FT858 and Pedra-2 were inoculated and incubated at 30 °C for 10 h at 250 rpm. After the production, the cells were recovered by centrifugation, at 105 rpm, resulting in a 10 mg mg-1 concentration of moist dough. This dough was subsequently inoculated in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Saccharomyces cerevisiae; Bioethanol.
Ano: 2022
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6719

PRODUTIVIDADE E ANÁLISE ECONÔMICA DO CULTIVO CONSORCIADO DE MILHO E BRAQUIÁRIA NO NOROESTE DO PARANÁ
Provedor de dados: 196
Autores: Wenneck, Gustavo Soares; Saath, Reni; Araujo, Larissa Leite de; Pereira, Gustavo Lopes; Oliveira, Giovanna Gabriela Ferreira de; Sá, Nathália de Oliveira; Volpato, Camila de Souza.
A consorciação de milho e Urochloa ruziziensis apresenta potencial para os sistemas de produção agrícola, permitindo a produção de grãos e biomassa remanescente. O estudo tem como objetivo avaliar a produtividade e a viabilidade econômica das modalidades de consórcio de milho e U. ruziziensis na região noroeste do Paraná. O experimento foi conduzido em Maringá-PR, em delineamento inteiramente casualizado com cinco tratamentos (milho solteiro; U. ruziziensis solteira; milho com U. ruziziensis na entre linha; milho com U. ruziziensis na mesma linha; milho com U. ruziziensis em linhas intercaladas) e quatro repetições. Foi analisado o desenvolvimento inicial e produtividade de grãos do milho, e produção de biomassa de milho e U. ruziziensis. Os dados foram...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Grain production; No-Tillage System; Biomassa; Produção de grãos; Sistema Plantio Direto.
Ano: 2021
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6163

Emissão e Seqüestro de Carbono
Provedor de dados: 25
Autores: Batista, Getulio Teixeira.
Essa apresentação em formato pdf foi utilizada em uma palestra para o programa de pòs-Graduação em Ciências Ambientais da Universidade de Taubaté. Vários slides são apresentados para ilustrar os forçantes da geração dos gases de efeito estufa e para ilustrar o mercado de carbono dentro do contexto do protocolo de Kyoto.
Tipo: Presentation
Palavras-chave: Biomass; Biomassa; Gases de efeito estufa; Mudanças Climáticas; Mudanças globais; Mercado de carbono.
Ano: 2006
URL: http://hdl.handle.net/2315/50

Almacenamiento de carbono en bosques manejados de Pinus patula en el Ejido La Mojonera, Zacualtipán, Hidalgo
Provedor de dados: 32
Autores: Figueroa Navarro, Consuelo Marisel.
La cantidad de biomasa se puede emplear para comparar la estructura y atributos funcionales de los ecosistemas forestales en condiciones climáticas similares. Con el objetivo de estimar la cantidad de biomasa y carbono (C) contenidos en rodales manejados de Pinus patula, se realizó este estudio en La Mojonera, Hidalgo. Este Ejido cuenta con programa de manejo en donde se aplica el método de regeneración de Árboles padres. El área está dividida en rodales señalados con la anualidad en la que se aplicó la corta. Para estimar la biomasa se ajustaron ecuaciones simultáneas para los componentes estructurales (fuste, ramas, follaje, corteza) a partir de la cosecha y pesaje de 18 individuos. Las ecuaciones obtenidas fueron: biomasa total, Bt = 5338.610 + 18.634...
Palavras-chave: Análisis de regresión; Biomasa; Bosque manejado; Captura de carbono; Ecuaciones alométricas; Pinus patula; Allometric equations; Biomass; Carbon capture; Managed forest; Maestría; Forestal.
Ano: 2010
URL: http://hdl.handle.net/10521/95

Elaboración artesanal de dos abonos líquidos fermentados y su efectividad en la producción de plántulas de chile habanero (Capsicum chinense Jacq).
Provedor de dados: 32
Autores: Salaya Domínguez, Jotam.
Con el objetivo de evaluar el efecto de dos abonos líquidos fermentados elaborados de subproductos regionales, en la producción de plántulas de chile habanero (Capsicum chinense Jacq), en la fase de vivero; se estableció el experimento en un predio del poblado C-34, Plan Chontalpa, Huimanguillo, Tabasco. Para la obtención de los abonos líquidos fermentados se utilizó el biodigestor tipo estacionario o Batch, a los cuales se les hizo las adecuaciones en la tapa que funcionó como válvula de escape, para la liberación de los gases generados durante la fermentación. Se utilizaron dos abonos, uno con biomasa de estiércol fresco de bovino (Biol Eb) y otro con follaje fresco de Gliricidia sepium (Jacq) (Biol Gs). Se realizaron tres repeticiones para determinar el...
Palavras-chave: Biodigestor; Biomasa; Efluentes; Biol; Plántulas; Biomass; Waste; Seedlings; Maestría; Producción Agroalimentaria en el Trópico.
Ano: 2010
URL: http://hdl.handle.net/10521/235

Desarrollo y calidad comercial de inflorescencias de Antirrhinum majus L. (Scrophulariaceae) en intemperie, Texcoco, Estado de México
Provedor de dados: 32
Autores: Reyes Montero, José Arturo.
Con el objetivo de evaluar los efectos de la radiación solar y de la temperatura del  aire en el desarrollo y la calidad comercial de Antirrhinum majus L., se estudiaron los  cv. Plumblossom y Orange de la Serie Potomac, y Bronze y Red de la Serie Rocket  cultivados a la intemperie en Montecillo, México, durante otoño-invierno 2006 y  primavera-verano 2007 a la densidad de 80 plantas m-2. Los cultivares de la serie  Potomac en el ciclo otoño-invierno requirieron menor acumulación de grados día  desarrollo (1254 °C·día-1) que los de la serie Rocket (1727 °C·día-1) para alcanzar la  madurez comercial; fueron más eficientes en el uso de la radiación que los cultivares  de la serie Rocket (0.61 g de biomasa seca·MJ-1 vs 0.36 g de biomasa seca·MJ-1),...
Palavras-chave: Serie Potomac; Serie Rocket; Radiación global; Temperatura del aire; Biomasa; Tallos florales Serie Potomac; Serie Rocket; Global radiation; Temperature of air; Biomass; Stems floral.
Ano: 2012
URL: http://hdl.handle.net/10521/855

Demanda nutrimental en plantaciones jóvenes de Eucalyptuspellita F. Muell en acrisoles de la sabana de huimanguillo.
Provedor de dados: 32
Autores: Gamboa Zúñiga, José Pablo.
Se determinó la demanda nutrimental en plantaciones jóvenes de Eucalyptuspellita. Para ello se delimitaron rodalesde 9 y 22 meses de edad, en ambos se describieron perfiles para determinar la asociación de suelo bajo la cual crecen. Se escogieron 4 individuos vigorosos de categorías diamétricas superiores en cada plantación (n=4). Se extrajo la biomasa total (aérea y radical) de cada individuo, se seccionó en: tronco, ramas, hojas y raíz. Se pesó en verde y se secó en un horno de circulación forzada a 70°C hasta peso constante. Luego se tomaron muestras de las distintas secciones y se llevaron a laboratorio para determinar la concentración de nitrógeno, fósforo, potasio y de los otros elementos esenciales. Ambos rodales crecen bajo la asociación...
Palavras-chave: Suelos ácidos; Dosis de fertilización; Biomasa; Nutrientes esenciales; Acids soils; Fertilization doses; Biomass; Essential nutrients; Maestría Tecnológica; Sistemas Sustentables de Producción en el Trópico.
Ano: 2013
URL: http://hdl.handle.net/10521/2056

Desarrollo y calidad comercial de inflorescencias de Antirrhinum majus L. (Scrophulariaceae) en intemperie, Texcoco, Estado de México
Provedor de dados: 32
Autores: Reyes Montero, José Arturo.
Con el objetivo de evaluar los efectos de la radiación solar y de la temperatura del  aire en el desarrollo y la calidad comercial de Antirrhinum majus L., se estudiaron los  cv. Plumblossom y Orange de la Serie Potomac, y Bronze y Red de la Serie Rocket  cultivados a la intemperie en Montecillo, México, durante otoño-invierno 2006 y  primavera-verano 2007 a la densidad de 80 plantas m-2. Los cultivares de la serie  Potomac en el ciclo otoño-invierno requirieron menor acumulación de grados día  desarrollo (1254 °C·día-1) que los de la serie Rocket (1727 °C·día-1) para alcanzar la  madurez comercial; fueron más eficientes en el uso de la radiación que los cultivares  de la serie Rocket (0.61 g de biomasa seca·MJ-1 vs 0.36 g de biomasa seca·MJ-1),...
Tipo: Tesis
Palavras-chave: Serie Potomac; Serie Rocket; Radiación global; Temperatura del aire; Biomasa; Tallos florales; Serie Potomac; Serie Rocket; Global radiation; Temperature of air; Biomass; Stems floral.
Ano: 2008
URL: http://hdl.handle.net/10521/1186

Estudio comparativo de tres épocas del año en características químicas, plantas y organismos de suelo contaminado con petróleo en La Venta, Tabasco, México.
Provedor de dados: 32
Autores: Dorantes Avelino, Rodrigo.
En esta investigación el objetivo fue evaluar las propiedades físicas, químicas y biológicas en un suelo Agrícola y Pecuario para un día específico en tres épocas del año, así como el efecto de los hidrocarburos del petróleo y acumulación de precipitación en el ejido José Narciso Rovirosa, Huimanguillo, Tabasco. El sitio seleccionado es un área de 44,321.199 m2 ubicada al sureste del Complejo Procesador de Gas La Venta, el suelo es receptor de petróleo crudo desde hace 20 años y fue descontaminado en abril 2002. Se establecieron (de agosto 2009  a abril 2010) nueve puntos (2x2 m) experimentales distribuidos completamente al azar. Se realizaron tres muestreos (30 de septiembre del 2009, 30 de enero y 30 de abril del 2010). Se determinó; la acumulación de...
Palavras-chave: Bacterias; Biomasa aérea; Hongos; Hidrocarburos; Precipitación; Bacteria; Biomass; Fungi; Hydrocarbons; Precipitation; Maestría; Producción Agroalimentaria en el Trópico.
Ano: 2010
URL: http://hdl.handle.net/10521/240

Almacenamiento de carbono en bosques manejados de Pinus patula en el Ejido La Mojonera, Zacualtipán, Hidalgo
Provedor de dados: 32
Autores: Figueroa Navarro, Consuelo Marisel.
La cantidad de biomasa se puede emplear para comparar la estructura y atributos funcionales de los ecosistemas forestales en condiciones climáticas similares. Con el objetivo de estimar la cantidad de biomasa y carbono (C) contenidos en rodales manejados de Pinus patula, se realizó este estudio en La Mojonera, Hidalgo. Este Ejido cuenta con programa de manejo en donde se aplica el método de regeneración de Árboles padres. El área está dividida en rodales señalados con la anualidad en la que se aplicó la corta. Para estimar la biomasa se ajustaron ecuaciones simultáneas para los componentes estructurales (fuste, ramas, follaje, corteza) a partir de la cosecha y pesaje de 18 individuos. Las ecuaciones obtenidas fueron: biomasa total, Bt = 5338.610 + 18.634...
Palavras-chave: Análisis de regresión; Biomasa; Bosque manejado; Captura de carbono; Ecuaciones alométricas; Pinus patula; Allometric equations; Biomass; Carbon capture; Managed forest; Maestría; Forestal.
Ano: 2010
URL: http://hdl.handle.net/10521/95

Utilización de un biofertilizante líquido en maíz (Zea mays L.) bajo condiciones del trópico húmedo.
Provedor de dados: 32
Autores: Alejandro Góngora, Antonio Okendo.
El objetivo de ésta investigación fue elaborar un biofertilizante líquido (Biol) fermentado anaeróbicamente, utilizando subproductos animales y vegetales, además de evaluar su eficacia en el cultivo de maíz, se contrasto con aplicaciones de fertilizante químico (manejo tradicional) y un biofertilizante comercial. Dado que no existe una dosis generada para aplicaciones con biofertilizantes se probaron tres concentraciones (5%, 10%, 15%) con el fin de obtener una dosis óptima preliminar de biofertilización del maíz.  El experimento se estableció en un predio del Poblado C-41, Plan Chontalpa, Huimanguillo, Tabasco. Para la elaboración y obtención del biofertilizante liquido fermentado anaeróbicamente, se preparó un tanque de 200 litros donde se vertieron los...
Palavras-chave: Biodigestor; Biomasa; Fermentación; Biol; Biofertilizante; Biomass; Fermentation; Biofertilizer; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/758

Biocarbones (Biochars), caracterización y efecto en la biomasa y nutrición de N P K en una gramínea.
Provedor de dados: 32
Autores: Escalante Rebolledo, María Ariadna.
Uno de los desafíos actuales para la ciencia y la tecnología  es crear o innovar conocimientos existentes que permitan resolver las necesidades que tiene la población del país. Para ello es necesario conocer tales necesidades y poder estudiar las estrategias y tecnologías pertinentes que lleven a la solución de dicha situación. La demanda alimenticia actual en México es cada día mayor y ésta contrasta con el estado de abandono del campo. En particular nos preocupa el grado de deterioro que presenta el recurso suelo, así como la escasez de prácticas agronómicas que eleven la productividad de los cultivos. Esto nos lleva a probar tecnologías que en otras partes del mundo, aunque sea a nivel de investigación, han resultado en un beneficio para el campo. El...
Palavras-chave: Biochar; Pirólisis; Caracterización; Secuestro de carbono; Bioenergía; Biomasa; Pyrolysis; Soil carbon sequestration; Biofuels; Biomass; Edafología; Doctorado.
Ano: 2013
URL: http://hdl.handle.net/10521/2209

Indicadores morfológicos y fisiológicos en Abies religiosa y su capacidad predictiva del desempeño en campo.
Provedor de dados: 32
Autores: Navarro Sandoval, José Luis.
El tamaño y las características morfológicas de la planta son factores importantes para lograr un buen desempeño en las plantaciones de restauración ecológica; las prácticas de cultivo en vivero que promueven el crecimiento radical y un adecuado nivel nutrimental para mejorar el desempeño de la planta en campo son indispensables en este proceso. Con el propósito de evaluar el efecto de la fertilización, el daño por heladas y la categoría diamétrica en el crecimiento, la morfología, la asignación de biomasa y el estado nutrimental en vivero, y su relación con la supervivencia y crecimiento de las plantas en dos ambientes de plantación (S1 y S2), se estableció un experimento con cuatro niveles de fertilización (T-50, TBase, T+50 y T+100), dos condiciones del...
Palavras-chave: Fertilización; Biomasa; Morfología; Tolerancia a la deshidratación; Supervivencia; Crecimiento; Fertilization; Biomass; Seedling morphology; Dehydration tolerance; Survival; Growth; Forestal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2103

Elaboración artesanal de dos abonos líquidos fermentados y su efectividad en la producción de plántulas de chile habanero (Capsicum chinense Jacq).
Provedor de dados: 32
Autores: Salaya Domínguez, Jotam.
Con el objetivo de evaluar el efecto de dos abonos líquidos fermentados elaborados de subproductos regionales, en la producción de plántulas de chile habanero (Capsicum chinense Jacq), en la fase de vivero; se estableció el experimento en un predio del poblado C-34, Plan Chontalpa, Huimanguillo, Tabasco. Para la obtención de los abonos líquidos fermentados se utilizó el biodigestor tipo estacionario o Batch, a los cuales se les hizo las adecuaciones en la tapa que funcionó como válvula de escape, para la liberación de los gases generados durante la fermentación. Se utilizaron dos abonos, uno con biomasa de estiércol fresco de bovino (Biol Eb) y otro con follaje fresco de Gliricidia sepium (Jacq) (Biol Gs). Se realizaron tres repeticiones para determinar el...
Palavras-chave: Biodigestor; Biomasa; Efluentes; Biol; Plántulas; Biomass; Waste; Seedlings; Maestría; Producción Agroalimentaria en el Trópico.
Ano: 2010
URL: http://hdl.handle.net/10521/235

Estudio comparativo de tres épocas del año en características químicas, plantas y organismos de suelo contaminado con petróleo en La Venta, Tabasco, México.
Provedor de dados: 32
Autores: Dorantes Avelino, Rodrigo.
En esta investigación el objetivo fue evaluar las propiedades físicas, químicas y biológicas en un suelo Agrícola y Pecuario para un día específico en tres épocas del año, así como el efecto de los hidrocarburos del petróleo y acumulación de precipitación en el ejido José Narciso Rovirosa, Huimanguillo, Tabasco. El sitio seleccionado es un área de 44,321.199 m2 ubicada al sureste del Complejo Procesador de Gas La Venta, el suelo es receptor de petróleo crudo desde hace 20 años y fue descontaminado en abril 2002. Se establecieron (de agosto 2009  a abril 2010) nueve puntos (2x2 m) experimentales distribuidos completamente al azar. Se realizaron tres muestreos (30 de septiembre del 2009, 30 de enero y 30 de abril del 2010). Se determinó; la acumulación de...
Palavras-chave: Bacterias; Biomasa aérea; Hongos; Hidrocarburos; Precipitación; Bacteria; Biomass; Fungi; Hydrocarbons; Precipitation; Maestría; Producción Agroalimentaria en el Trópico.
Ano: 2010
URL: http://hdl.handle.net/10521/240

El modelo sistémico para la fertilización nitrogenada en brócoli (Brassica oleracea itálica).
Provedor de dados: 32
Autores: Cartagena Ayala, Yamil Everaldo.
La aplicación de nitrógeno para la producción de brócoli suele ser ajustada con base en criterios empíricos con el riesgo de llegar a dosis excesivas. En este sentido, una alternativa para precisar la cantidad de nitrógeno que debe agregarse es a través de la evaluación cuantitativa de la demanda nitrogenada del cultivo, el suministro de nitrógeno del suelo y la eficiencia de la fertilización nitrogenada. Se realizaron dos experimentos (octubre de 2012 a enero de 2013 y abril a julio del 2013) en el Campo Experimental Tlapeaxco de la Universidad Autónoma Chapingo, México. Los factores en estudio para el primer experimento fueron: láminas de riego (3 y 6 mm) y dosis de nitrógeno (80, 160, 240 y 320 kg ha-1), y para el segundo experimento las dosis de...
Palavras-chave: Peso fresco; Biomasa; Nitrógeno acumulado; Inflorescencia; Fresh weight; Biomass; Accumulated nitrogen; Inflorescence; Edafología; Doctorado.
Ano: 2014
URL: http://hdl.handle.net/10521/2390

Respuestas fisiológicas y bioquímicas de plántulas de pimiento morrón (Capsicum annuum L) a factores de estrés abiótico.
Provedor de dados: 32
Autores: Hernández Bautista, Leonel.
En la presente investigación se realizaron dos experimentos con el objetivo de evaluar el efecto de cloruro de sodio (NaCl) y cadmio (Cd) en variables de crecimiento, fisiológicas y bioquímicas de plántulas de pimiento morrón variedad Yolo Wonder. Ambos experimentos fueron conducidos bajo condiciones de invernadero, en cultivo hidropónico en placas flotantes en contenedores de 3 L de capacidad, utilizando la solución nutritiva Steiner al 50%. En el primer experimento se trataron las plántulas de pimiento durante 30 días con diferentes concentraciones de NaCl (0, 25 y 50 mM), posteriormente se evaluaron parámetros de crecimiento, variables fisiológicas y acumulación de macro y micronutrimentos. La adición de 25 y 50 mM de NaCl disminuyen significativamente...
Palavras-chave: Yolo Wonder; Cloruro de sodio; Cadmio; Crecimiento; Biomasa; Variables fisiológicas; Sodium chloride; Cadmium; Growth; Biomass; Physiological variables; Fisiología Vegetal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2164

Desarrollo y calidad comercial de inflorescencias de Antirrhinum majus L. (Scrophulariaceae) en intemperie, Texcoco, Estado de México
Provedor de dados: 32
Autores: Reyes Montero, José Arturo.
Con el objetivo de evaluar los efectos de la radiación solar y de la temperatura del  aire en el desarrollo y la calidad comercial de Antirrhinum majus L., se estudiaron los  cv. Plumblossom y Orange de la Serie Potomac, y Bronze y Red de la Serie Rocket  cultivados a la intemperie en Montecillo, México, durante otoño-invierno 2006 y  primavera-verano 2007 a la densidad de 80 plantas m-2. Los cultivares de la serie  Potomac en el ciclo otoño-invierno requirieron menor acumulación de grados día  desarrollo (1254 °C·día-1) que los de la serie Rocket (1727 °C·día-1) para alcanzar la  madurez comercial; fueron más eficientes en el uso de la radiación que los cultivares  de la serie Rocket (0.61 g de biomasa seca·MJ-1 vs 0.36 g de biomasa seca·MJ-1),...
Palavras-chave: Serie Potomac; Serie Rocket; Radiación global; Temperatura del aire; Biomasa; Tallos florales Serie Potomac; Serie Rocket; Global radiation; Temperature of air; Biomass; Stems floral.
Ano: 2012
URL: http://hdl.handle.net/10521/802

Crecimiento y rendimiento del frijol en siembra asociada y prácticas de manejo.
Provedor de dados: 32
Autores: Delgado Martínez, Rafael.
El objetivo de estudio fue determinar si la siembra asociada de frijol, así como las prácticas de manejo limita el crecimiento y rendimiento de frijol. El experimento fue conducido en Montecillo, México, bajo condiciones de temporal, durante los ciclos primavera verano del 2010 y 2011. Se evaluó el rendimiento de ejote y rendimiento de grano (RG) y componentes de frijol, así como rendimiento de grano (RG) y sus componentes en maíz, así mismo se anotaron los días a ocurrencia de las etapas fenológicas del frijol y maíz. Por otra parte, se registraron los índices ambientales y se estimó la eficiencia en el uso del agua radiación y uso de la tierra en ambas especies. Los resultados indican que los días a ocurrencia a las etapas fenológicas en frijol y maíz,...
Palavras-chave: Phaseolus vulgaris L.; Zea mays L.; Fenología; Biomasa; Phenology; Biomass; Botánica; Doctorado.
Ano: 2013
URL: http://hdl.handle.net/10521/2181

Producción de chile guajillo (Capsicum annuum  L.) en función de la edad al trasplante, aplicación de residuo de girasol y tipo de suelo
Provedor de dados: 32
Autores: Vázquez Casarrubias, Gabino.
En relación a la siembra directa el trasplante en el cultivo de chile permite el uso eficiente de semillas,  uniformidad en la población y seguridad en la producción. Sin embargo, dicha producción dependerá  de la edad de la plántula al trasplante. El objetivo del presente estudio fue evaluar el crecimiento y  rendimiento de dos cultivares de chile Guajillo (Capsicum annuum L.) Apaxtleco y Mirasol en función  de la edad al trasplante, el manuscrito se presenta en 4 capítulos: Capítulo I. Crecimiento y  rendimiento de chile guajillo Apaxtleco y Mirasol en función de la edad al trasplante bajo condiciones  de invernadero, en donde se establecieron 3 fechas de trasplante a los 15, 30 y 45 días después de la  emergencia (dde). Capítulo II. Crecimiento y...
Tipo: Tesis
Palavras-chave: Altura; Área foliar; Botones; Flores; Biomasa; Rendimiento; Indice de cosecha; Maestría; Botánica; Height; Leaf area; Buttons; Flowers; Biomass; Yield; Harvest index.
Ano: 2008
URL: http://hdl.handle.net/10521/1496

Integrating local knowledge and science: economic consequences of driftwood harvest in a changing climate
Provedor de dados: 7
Autores: Jones, Chas E; International Arctic Research Center, University of Alaska Fairbanks; chas@chasjones.com; Kielland, Knut; Institute of Arctic Biology, University of Alaska Fairbanks; kkielland@alaska.edu; Hinzman, Larry D; International Arctic Research Center, University of Alaska Fairbanks; ldhinzman@alaska.edu; Schneider, William S; Oral History Department, University of Alaska Fairbanks; wsschneider@alaska.edu.
The integration of local knowledge and science represents an opportunity to enhance the understanding of interrelations among climate, hydrology, and socioeconomic systems while providing mutual benefits to scientists and rural communities. Insight from rural Alaskans helped to identify a social-ecological threshold used to model potential driftwood harvest from the Yukon River. Information from residents of Tanana, Alaska, was combined with scientific data to model driftwood harvest rates. Modeling results estimated that between 1980 and 2010, hydrologic factors alone were responsible for a 29% decrease in the annual wood harvest, which approximately balanced a 23% reduction in wood demand because of a decline in number of households. The...
Tipo: Peer-Reviewed Reports
Palavras-chave: Biomass; Climate; Driftwood; Economics; Flood; Hydrology; Large woody debris; Local knowledge; Participatory research; Social-ecological model; Threshold.
Ano: 2015

Bioconversion and saccharification of some lignocellulosic wastes by Aspergillus oryzae ITCC-4857.01 for fermentable sugar production
Provedor de dados: 69
Autores: Begum,Most. Ferdousi; Alimon,Abdul Razak.
The recent interest in bioconversion of agricultural and industrial wastes to chemical feedstock has led to extensive studies on cellulolytic enzymes produced by microorganisms. In the present study three lignocellulosic substrates viz. sugarcane bagasse, sawdust and water hyacinth were pre-treated with alkali and enzyme and their effect on bioconversion has been investigated. The ability of selected substrates for induction of cellulase enzyme by A. oryzae ITCC 4857.01 and for the potentiality of the induced enzyme to saccharify the substrates were also assessed. The maximum degree of conversion of substrate (0.415%) and improved specific substrate consumption (0.99 g substrate/g dry biomass) was exhibited in sugarcane bagasse after alkali treatment at 96...
Tipo: Journal article
Palavras-chave: Aspergillus oryzae; Biomass; Cellulase; Lignocellulosic substrates; Pre-treatment; Saccharification.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000500003

Effect of Brachionus rubens on the growth characteristics of various species of microalgae
Provedor de dados: 69
Autores: Abou,Reda A.I; Singh,Manjinder; Rivera-Cruz,Anangelica; Power,Grace; Bagby-Moon,Thomas; Das,Keshav.
Background: Cultivation of algae for conversion to biofuels has gained global interest. Outdoor raceway cultivation is preferred because of its lower capital and operating costs. A major disadvantage of outdoor cultivation is susceptibility of algal crops to attack by predatory rotifers. In order to quantify the impact of rotifer attack on different species of algae, we evaluated the growth of eleven microalgal species over a 21-d period after being infected by the predatory rotifer Brachionus rubens. Results: Of the eleven species, Chlorella sorokiniana was the most susceptible with rapid decline in algal growth concomitant with increase in rotifer population growth (3.82/d). In contrast, Synechococcus elongatus andScenedesmus dimorphus were both...
Tipo: Journal article
Palavras-chave: Algae; Biofuels; Biomass; Cyanobacteria; FlowCam; Grazer.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000400010

Isolation and characterization of hydrocarbon producing green alga Botryococcus braunii from Indian freshwater bodies
Provedor de dados: 69
Autores: Dayananda,Chandrappa; Sarada,Ravi; Kumar,Vinod; Ravishankar,Gokare Aswathanarayana.
Samples of green colonial unicellular microalga Botryococcus braunii were collected from Bear Shola Falls at Kodaikanal (latitude 10.31 N and longitude 77.32 E), Tamil Nadu, India. Specimens were isolated, cultured and examined for its hydrocarbon content, morphological features and DNA structural resemblance with the known strain to confirm its identity. Inter simple sequence repeats (ISSR) finger printing revealed strong genetic similarity among the authentic strain (B. braunii N-836) and the Indian isolated strain (B. braunii CFTRI- Bb1) from Kodaikanal. The type of hydrocarbons produced by the Kodaikanal isolates were analyzed and identified as saturated hydrocarbons in the range of C21 to C33 by GCMS. Tetracosane and octacosane were found as the major...
Tipo: Journal article
Palavras-chave: Biomass; Carbon dioxide; Carotenoids; Fatty acids; Inter simple sequence repeats; Saturated hydrocarbons.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000100008

Statistical optimization of thermo-alkali stable xylanase production from Bacillus tequilensis strain ARMATI
Provedor de dados: 69
Autores: Khusro,Ameer; Kannan Kaliyan,Barathi; Abdullah Al-Dhabi,Naif; Valan Arasu,Mariadhas; Agastian,Paul.
Background: Xylanase from bacteria finds use in prebleaching process and bioconversion of lignocelluloses into feedstocks. The xylanolytic enzyme brings about the hydrolysis of complex biomolecules into simple monomer units. This study aims to optimize the cellulase-free xylanase production and cell biomass of Bacillus tequilensis strain ARMATI using response surface methodology (RSM). Results: Statistical screening of medium constituents and the physical factors affecting xylanase and biomass yield of the isolate were optimized by RSM using central composite design at N = 30, namely 30 experimental runs with 4 independent variables. The central composite design showed 3.7 fold and 1.5 fold increased xylanase production and biomass yield of the isolate...
Tipo: Journal article
Palavras-chave: Bacillus tequilensis; Biomass; Central composite design; RSM; Xylanase.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000400003

Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa
Provedor de dados: 69
Autores: Serna-Cock,Liliana; Mera-Ayala,José Daniel; Angulo-López,Jorge Eduardo.
Background: The fermentation substrate efficiency of glucose supplemented with guava seed flour (GGSF) or glucose supplemented with dry Aspergillus niger mycelium (GANM) was evaluated during the production of biomass and antimicrobial compounds by the lactic acid bacteria Weissella confusa. Results: The fermentation substrate efficiency was measured by comparing the biomass formation, substrate consumption, substrate conversion, antimicrobial activity and product yield. The antimicrobial activity was measured against a commercial Staphylococcus aureus strain. The results were compared against fermentations performed in a commercial substrate (CS), the MRS (Man-Rogosa-Sharpe) substrate. The fermentations were performed discontinuously for 4 hrs at 100 rpm...
Tipo: Journal article
Palavras-chave: Agroindustrial residue; Bacteriocin; Biomass; Inhibition.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000600017

INCREASED ENERGY COGENERATION IN THE SUGAR-ENERGY SECTOR WITH THE USE OF SUGARCANE STRAW, ELECTRIFICATION OF DRIVES, AND HIGH-DRAINAGE ROLLERS IN THE EXTRACTION
Provedor de dados: 70
Autores: Santos,Paulo S. B. dos; Ramos,Ricardo A. V.
ABSTRACT The sugar-energy sector stands out in the production of electrical energy in the Brazilian energy matrix. The updating of Law 9,427 allowed increasing the limit of power injected in the transmission or distribution systems of existing projects from 30 to 50 MW, encouraging studies of expansion and/or implementation of new cogeneration projects. This study analyzed technologies to enhance energy cogeneration in a plant that sells about 27 MW of surplus power. For this, were studied the use of straw, electrification of drives by steam turbines, and high-drainage rollers (lotus mill roller), which allows reducing bagasse moisture, increasing its lower calorific value (LCV) and, consequently, electrical energy generation. Mass and energy balances in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioelectricity; Biomass; Combustion; Calorific value; Numerical simulation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200249

Rheological behavior of Chlorella sp. e Scenedesmus sp. cultures in different biomass concentrations
Provedor de dados: 70
Autores: Santos,Michel de O. dos; Martins,Márcio A; Coimbra,Jane S. dos R.; Gates,Richard S.; Corrêdo,Lucas de P.
Studies involving the use of microalgae are increasingly intensifying for the potential they present to produce biofuels, because they are a renewable energy source that does not compete directly with food production, and because they enable the obtaining of a fuel with less environmental impact when compared to fossil fuel. In this context, the use of microalgae is directly associated to its capacity to be produced on a large scale and to be extracted from the culture medium. Rheological studies are important for obtaining the information needed in the elaboration of projects and equipment that will be used in various operations existing in systems of production and extraction of algal biomass. In the evaluation of different levels of dry biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microalgae; Biomass; Production; Operation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000500017

Microgeneration of electricity with producer gas in dual fuel mode operation
Provedor de dados: 70
Autores: Silva,Marcelo J.; Souza,Samuel N. M. de; Ricieri,Reinaldo P.; Souza,Abel A.; Secco,Deonir.
Among the alternatives to meet the increasing of world demand for energy, the use of biomass as energy source is one of the most promising as it contributes to reducing emissions of carbon dioxide in the atmosphere. Gasification is a technological process of biomass energy production of a gaseous biofuel. The fuel gas has a low calorific value that can be used in Diesel engine in dual mode for power generation in isolated communities. This study aimed to evaluate the reduction in the consumption of oil Diesel an engine generator, using gas from gasification of wood. The engine generator brand used was a BRANCO, with direct injection power of 7.36 kW (10 HP) coupled to an electric generator 5.5 kW. Diesel oil mixed with intake air was injected, as the oil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gasification; Biomass; Diesel engine generator.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000500005

Ammonium/nitrate ratio affects the growth and glucosinolates content of pakchoi
Provedor de dados: 75
Autores: Yang,Jing; Zhu,Biao; Ni,Xiaolei; He,Yong.
ABSTRACT Nitrogen (N) strongly affects plant growth. However, little is known about the effects of the ammonium/nitrate ratio on pakchoi (Brassica rapa), especially its glucosinolates (GSs) contents which are involved in plant defense and many of them benefit to human health. The aim of this study was to evaluate the effects of a constant N supply (8 mM) but with five ammonium/nitrate ratios (namely 0/8 mM, 2/6 mM, 4/4 mM, 6/2 mM and 8/0 mM) on the growth of pakchoi in a hydroponic system in 2 years. In both years, a higher biomass (dry weight) was in the 4/4 and 2/6 ammonium/nitrate treatments (2.3 and 2.2-fold compared to 8/0, respectively), with no significant difference in biomass between these two treatments. The biomass then decreased with increasing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brassica rapa; Biomass; Nitrogen form; Secondary metabolites.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000300246

Physiological differences of ‘Crocantela’ lettuce cultivated in conventional and hydroponic systems
Provedor de dados: 75
Autores: Souza,Priscila F de; Borghezan,Marcelo; Zappelini,Julia; Carvalho,Lara R de; Ree,Joseph; Barcelos-Oliveira,Jorge L; Pescador,Rosete.
ABSTRACT Conventional soil and hydroponic growing systems have inherent differences in water and nutritional availability. These differences may affect plant physiological development and biochemistry. The objective of this study was to evaluate lettuce (Lactica sativa) cv. ‘Crocantela’development in either a hydroponic system or in soil through analyses of vegetative growth; chlorophyll abundance; and sugar and starch content. We evaluated the dry mass (DM), fresh mass (FM), number of leaves (LN), stomatal density and contents of chlorophyll, carotenoids, sugars and starch. Due to the improved nutritional conditions, especially in relation to macronutrients, plants grown in hydroponic system presented significant differences in chlorophyll a (0.4481...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Biomass; Chlorophyll; Starch; Stomatal density.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000100101

Acoustical estimation of the Antarctic krill swarms spatial distribution and biomass
Provedor de dados: 13
Autores: Tokarev, Yu. N.; Vasilenko, V. I.; Zhuk, V. F.; Sokolov, V. G.; Slipetsky, D. Ya.
The method of acoustic express-evaluation of the krill (Euphausia superba Dana) population spatial structure and determination of its accumulations biomass, with 80 kHz echosounding frequencies has been worked out during the 7-th Ukrainian Antarctic expedition. The method error does not exceed 10 %, which permits to recommend it for usage under the Antarctic krill fishery conditions. The principal possibility to acoustically express-evaluate chorological structure of the Antarctic krill population has been shown. Formation by krill of dense accumulations of different form, elongated for 6 miles, appeared to be an expressed feature of krill behaviour during observations. The school type in krill distribution was observed as well. Parallel to this the...
Tipo: Journal Contribution
Palavras-chave: Acoustic; Antarctic krill; Abundance; Biomass; Акустика; Антарктический криль; Распределение; Биомасса Acoustic data Abundance Biomass Krill fisheries Biomass http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2005
URL: http://repository.ibss.org.ua/dspace/handle/99011/188

Annual dynamics of abundance, biomass and survival of meroplankton in Sevastopol Bay, Black Sea
Provedor de dados: 13
Autores: Pavlova, E. V.; Murina, V.  V.; Kemp, R. B.; Wilson, J. G.; Parchevsky, V. P.
The first comprehensive data on species composition, abundance, biomass and survival (living/dead ratio) of meroplankton in Sevastopol Bay (Black Sea) are presented. Marked differences were observed between the years 1998 and 1999, and these could be attributed to the hydrology and the eutrophication status of the different parts of the Bay. Shannon index and selected community parameters (number of species, biomass, numbers of individuals) indicated that South Bay was the worst affected part of the Bay with the greatest eutrophication impact on the meroplankton. The early larval stages of the barnacle Balanus improvisus and of the polychaete Polydora sp. were the most sensitive to presumed environmental stresses. It is suggested that the mortality of...
Tipo: Journal Contribution
Palavras-chave: Abundance; Biomass; Survival; Meroplankton; Environmental conditions; Sevastopol Bay; Black Sea; Численность; Биомасса; Выживаемость; Меропланктон; Среда; Севастопольская бухта; Черное море Abundance Biomass Survival Meroplankton Environmental conditions Biomass Survival Environmental conditions http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_7538 http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2007
URL: http://repository.ibss.org.ua/dspace/handle/99011/301

Необычное "цветение" в прибрежных водах г. Севастополя
Provedor de dados: 13
Autores: Сеничева, М. И.
On results of long-term monitoring of Sevastopol coastal waters in 2000th the “water-bloom” caused largecell diatoms Proboscia alata is noted the first time. Its mass development in the waters which have been impoverished by mineral forms of biogenic elements allows to suppose at it a presence of abilities to myxtrophic method of feed.
Tipo: Book Section
Palavras-chave: Phytoplankton; Quantity; Biomass; Biogenic elements; “water-bloom”.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1885

Структура и динамика макрофитоперифитона и макрофитобентоса заповедника «Мыс Мартьян» (Чёрное море)
Provedor de dados: 13
Autores: Евстигнеева, И. К.; Танковская, И. Н.
Описан видовой состав, эколого-таксономическая структура и особенности формирования фитомассы в альгоценозах перифитона и бентоса акватории заповедника «Мыс Мартьян» в весенний период вегетации водорослей. Установлено, что ценозы макрофитобентоса и макрофитоперифитона различаются степенью эколого-таксономического разнообразия, доминантами и уровнем продуцируемой фитомассы. http://biotex.ibss.org.ua/
Tipo: Journal Contribution
Palavras-chave: Макрофитоперифитон; Макрофитобентос; Фитомасса; Мыс Мартьян; Чёрное море; Macroperiphyton; Macrophytobenthos; Biomass; Cape Martian; Black Sea.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1745

Особенности питания черноморского шпрота Sprattus  sprattus  phalericus (Risso) (Pisces: Clupeidae) и формирование его нагульных скоплений.
Provedor de dados: 13
Autores: Глущенко, Т. И.; Чащин, А. К.
Использованы материалы экспедиций, выполненных на НИС «Д. Стефанов» и «С. Осипенко» в июле – августе 1992 и мае 1993 гг. на северо-западном и северо-восточном шельфе Чёрного моря. Исследовано питание и распределение черноморского шпрота в разных условиях нагула. Показано значение отдельных компонентов кормового зоопланктона в формировании рациона шпрота разных размерных групп. Выявлена высокая специализация в питании крупных особей (рыб старших возрастов). Коэффициент корреляции между плотностью скоплений рыб старших возрастных групп и концентрацией холодноводных рачков в слоях воды дно – 25 м, 50 – 25 м составил 0.90. Предполагается, что отмечаемое в последние годы ухудшение сырьевой базы тралового промысла шпрота обусловлено сокращением численности...
Tipo: Journal Contribution
Palavras-chave: Шпрот; Калянус; Участки шельфа; Кормовой зоопланктон; Плотность скоплений; Биомасса; Black Sea sprat; Calanus; Shelf grounds; Fodder zooplankton; Accumulation density; Biomass; Щільність скупчень; Біомаса.
Ano: 2008
URL: http://repository.ibss.org.ua/dspace/handle/99011/817

Особенности развития планктонных инфузорий в причерноморских лиманах различного типа
Provedor de dados: 13
Autores: Курилов, А. В.
Изучены основные характеристики сообществ планктонных инфузорий в  Тилигульском, Сухом и Шаболатском лиманах (северо-запад Черного моря), характеризующихся различным происхождением и степенью водообмена с морем. Приведены видовой состав, средние значения численности, биомассы и продукции, а также соотношение в планктоне основных трофических групп инфузорий. Показано уменьшение видового сходства инфузорий в изученных водоёмах по мере увеличения изоляции от моря.
Tipo: Journal Contribution
Palavras-chave: Лиманы; Планктонные инфузории; Трофическая структура; Численность; Биомасса; Продукция; Видовое разнообразие; Planktonic ciliates; Trophic structure; Biomass; Species diversity Species diversity Biomass Trophic structure Biomass Species diversity http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2003
URL: http://repository.ibss.org.ua/dspace/handle/99011/536

Сравнение видового состава и количественного развития полихет обрастания и бентоса на примере Одесского порта
Provedor de dados: 13
Autores: Лосовская, Г. В.; Синегуб, И. А.; Рыбалко, А. А.
На большом фактическом материале (222 пробы обрастания, 123 пробы бентоса), собранном в  2001 г., изучены видовой состав, количественное развитие полихет и их экологическая структура в акватории Одесского порта. Зарегистрировано 19 видов полихет (17 видов в бентосе и 9 – в обрастании гидротехнических сооружений). Наиболее массовыми видами были Neanthes succinea, Polydora limicola и Heteromastus filiformis. Среди основных жизненных форм в обрастании и в бентосе доминировали интра-эпибионты. В обрастании преобладали полифаги, в бентосе – полифаги и детритофаги. Средние численность и биомасса полихет в обрастании были выше, чем в бентосе; на ракуше выше, чем на илах. На участке с относительно свободным водообменом средняя численность была в 4, а средняя...
Tipo: Journal Contribution
Palavras-chave: Полихеты; Обрастание; Бентос; Численность; Биомасса; Одесский порт; Polychaetes; Fouling; Benthos; Abundance; Biomass; Odessa port Biomass Fouling Benthos Abundance Benthos Biomass Fouling http://aims.fao.org/aos/agrovoc/c_878 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_25400.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/68

Состояние зоопланктонного сообщества Севастопольской бухты после вселения гребневика Beroe ovata в Черное море (1999 – 2003 гг.)
Provedor de dados: 13
Autores: Губарева, Е. С.; Светличный, Л. С.; Романова, З. А.; Аболмасова, Г. И.; Аннинский, Б. Е.; Финенко, Г. А.; Бат, Л.; Кидейс, А.
С сентября 1999 г. по сентябрь 2003 г. на постоянной станции у выхода из Севастопольской бухты выполнены исследования сезонной динамики видового состава, численности и биомассы кормового и желетелого зоопланктона (Beroe ovata и Mnemiopsis leidyi). Сезонная динамика биомассы кормового зоопланктона Севастопольской бухты характеризовалась летне-осенним и зимним максимумами, достигающими 2.4 г/м2. Основной вклад в биомассу кормового зоопланктона вносил меропланктон и копеподы (42.84.0 и 32.03.4% среднегодовой биомассы, соответственно). После появления в Черном море хищного гребневика B. ovata среднегодовая биомасса M. leidyi в Севастопольской бухте снизилась в среднем в 3.5 раза по сравнению с 1995 г., сократилась продолжительность его воздействия на...
Tipo: Journal Contribution
Palavras-chave: Черное море; Севастопольская бухта; Зоопланктон; Численность; Биомасса; Многолетние изменения; The Black Sea; Sevastopol Bay; Zooplankton; Mnemiopsis leidyi; Beroe ovata; Abundance; Biomass; Long-term fluctuation Biomass Zooplankton Abundance Zooplankton Biomass http://aims.fao.org/aos/agrovoc/c_15490 http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/66

Поселение черноморской мидии на бетонной набережной Севастопольской бухты (Чёрное море)
Provedor de dados: 13
Autores: Соловьева, О. В.
Впервые исследовано поселение мидий на набережной Севастопольской бухты в районе между мысами Николаевским и Хрустальным. Получены данные о численности, биомассе, размерном распределении и фильтрационной активности данного вида в исследуемом районе в теплое и холодное время года.
Tipo: Journal Contribution
Palavras-chave: Мидия; Биомасса; Размерный состав; Численность; Севастопольская бухта; Чёрное море; Mussel; Biomass; Dimensional structure; Abundance; Sevastopol bay; Black Sea Abundance Biomass Mussel culture Biomass http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2005
URL: http://repository.ibss.org.ua/dspace/handle/99011/237

ЭКОЛОГО-ФИТОЦЕНОТИЧЕСКИЕ ОСОБЕННОСТИ ПРОИЗРАСТАНИЯ ВИДОВ РОДА ГРАЦИЛЯРИЯ (ОБЗОР)
Provedor de dados: 13
Autores: Миронова, Н. В.
Описаны фитоценозы с участием прикрепленных и неприкрепленных форм Gracilaria gracilis и G.dura в прибрежной зоне Чёрного моря (Севастопольское взморье и б.Новороссийская). Определены районы в Мировом океане, где G. gracilis доминирует по биомассе в составе донной растительности. http://biotex.ibss.org.ua/
Tipo: Journal Contribution
Palavras-chave: Макрофиты; Грацилярия; Фитоценозы; Биомасса; Макрофіти; Грацилярія; Фітоценози; Біомаса; Macroalgae; Gracilaria; Phytocenoses; Biomass.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1876

Сезонная изменчивость количественного развития фитопланктона у Аргентинских островов (Антарктика).
Provedor de dados: 13
Autores: Кузьменко, Л. В.; Игнатьев, С. М.
Приводятся результаты исследования количественного развития фитопланктона для прибрежных вод Аргентинского архипелага. Материалы собраны в 7-й УАЭ (зимовка 2002 – 2003 гг.) и 10-й УАЭ (сезонные работы 2005 г.). Впервые получены сведения о сезонной динамике количественного развития, видовом разнообразии фитопланктона, выделены доминирующие виды, сроки их массовой вегетации и стадии сукцессии. В водах архипелага обнаружено 126 видов и разновидностей микроводорослей, 73% из которых – диатомовые, 16,6 % - динофитовые. Исследования, проведённые антарктической осенью 2005 г., дополнили список видов на 31 таксон. Наиболее высокие показатели обилия фитопланктона получены для весенне-летнего сезона, когда в октябре наблюдалось «цветение» воды, вызванное мелкими...
Tipo: Journal Contribution
Palavras-chave: Фитопланктон; Численность; Биомасса; Видовой состав; Аргентинские о-ва; Антарктика; Phytoplankton; Abundance; Biomass; Species composition; Argentine Islands; Antarctic; Фітопланктон; Чисельність; Біомаса; Видовий склад; Аргентинські о-ви.
Ano: 2007
URL: http://repository.ibss.org.ua/dspace/handle/99011/847

Распределение живого и мёртвого мезозоопланктона в прибосфорских районах Чёрного и Мраморного морей: солёностная толерантность Acartia clausi и A. tonsa.
Provedor de dados: 13
Autores: Губарева, Е. С.; Светличный, Л. С.; Ишинибилир, М.; Бельмонте, Г.
В прибосфорских районах Чёрного и Мраморного морей в октябре 2005 г. наблюдалось снижение биомассы кормового зоопланктона с 6102.6 до 2363.7 мг м-2 по направлению к Мраморному морю. Эта тенденция обусловлена резким изменением биомассы 4 видов копепод – Calanus euxinus, Pseudocalanus elongatus, Acartia clausi и A. tonsa. Одновременно с этим возрастала доля мёртвых организмов. Максимальная доля мёртвых особей A. clausi (88 %) отмечена в слое солёностного градиента Мраморного моря, что указывает на низкую галотолерантность этого вида. В лабораторных кратковременных экспериментах A. clausi, собранные у входа в пролив Босфор, погибали при повышении солёности с 18.9 до 29.4 ‰. Выживаемость A. clausi из удалённого от Босфора района Принцевых о-вов оказалась более...
Tipo: Journal Contribution
Palavras-chave: Мезозоопланктон; Биомасса; Численность; Выживаемость; Acartia clausi; Acartia tonsa; Солёностная толерантность; Скорость дыхания; Двигательная активность; Чёрное море; Мраморное море; Mesozooplankton; Biomass; Abundance; Survival; Acartia clausi; Acartia tonsa; Salinity tolerance; Respiratory rate; Locomotory activity; Black Sea; Marmara Sea; Біомаса; Чисельність; Виживаність; Солоністна толерантність; Швидкість дихання; Рухова активність; Чорне море; Мармурове море.
Ano: 2008
URL: http://repository.ibss.org.ua/dspace/handle/99011/829

Распределение живого и мёртвого мезозоопланктона в прибосфорских районах Чёрного и Мраморного морей: солёностная толерантность Acartia clausi и A. tonsa.
Provedor de dados: 13
Autores: Губарева, Е. С.; Светличный, Л. С.; Ишинибилир, М.; Бельмонте, Г.
В прибосфорских районах Чёрного и Мраморного морей в октябре 2005 г. наблюдалось снижение биомассы кормового зоопланктона с 6102.6 до 2363.7 мг м-2 по направлению к Мраморному морю. Эта тенденция обусловлена резким изменением биомассы 4 видов копепод – Calanus euxinus, Pseudocalanus elongatus, Acartia clausi и A. tonsa. Одновременно с этим возрастала доля мёртвых организмов. Максимальная доля мёртвых особей A. clausi (88 %) отмечена в слое солёностного градиента Мраморного моря, что указывает на низкую галотолерантность этого вида. В лабораторных кратковременных экспериментах A. clausi, собранные у входа в пролив Босфор, погибали при повышении солёности с 18.9 до 29.4 ‰. Выживаемость A. clausi из удалённого от Босфора района Принцевых о-вов оказалась более...
Tipo: Journal Contribution
Palavras-chave: Мезозоопланктон; Биомасса; Численность; Выживаемость; Acartia clausi; Acartia tonsa; Солёностная толерантность; Скорость дыхания; Двигательная активность; Чёрное море; Мраморное море; Mesozooplankton; Biomass; Abundance; Survival; Acartia clausi; Acartia tonsa; Salinity tolerance; Respiratory rate; Locomotory activity; Black Sea; Marmara Sea; Біомаса; Чисельність; Виживаність; Солоністна толерантність; Швидкість дихання; Рухова активність; Чорне море; Мармурове море.
Ano: 2008
URL: http://repository.ibss.org.ua/dspace/handle/99011/829

Таксономический состав, численность и биомасса копепод в эпипелагиали Аравийского моря в периоды летнего и зимнего муссонов
Provedor de dados: 13
Autores: Прусова, И. Ю.; Смит, Ш. Л.
Анализируются таксономический состав, численность и биомасса копепод в эпипелагиали северо-западного и центрального регионов аравийского моря на основе зоопланктонных материалов, собранных в рамках программы US JGOFS на акватории между Оманом и Индией севернее 10° с.ш. в периоды летнего (август - сентябрь) и зимнего (декабрь) муссонов 1995 г. Идентифицировано 150 видов копепод. В периоды обоих муссонов по численности преобладали виды семейств Paracalanidae, Oncaeidae, Oithonidae, по биомассе - виды семейств Calanidae и Eucalanidae. Видовое разнообразие копепод было высоким на всей исследованной акватории в периоды обоих сезонов. В северо-западной части моря таксономическая структура копепод подвержена пространственно-временным изменениям, связанным с...
Tipo: Journal Contribution
Palavras-chave: Копеподы; Таксономический состав; Численность; Биомасса; Разнообразие; Апвеллинг; Муссон; Эпипелагиаль; Аравийское море; Copepods; Taxonomic composition; Number; Biomass; Dominance; Upwelling; Monsoon; Epipelagic realm; Arabian Sea Epipelagic zone Monsoons Upwelling Biomass Biomass http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2005
URL: http://repository.ibss.org.ua/dspace/handle/99011/247

Сезонные и межгодовые изменения численности бактериопланктона в районе Аргентинских островов, Антарктика
Provedor de dados: 13
Autores: Серёгин, С. А.
Впервые для района Украинской антарктической станции Академик Вернадский (бывшая британская станция Фарадей) представлены результаты исследований обилия бактериопланктона для разных временных масштабов – сезонного и многолетнего. Общие закономерности сезонных изменений численности планктонных бактерий в исследуемом районе характеризовались минимальными показателями в позднезимний период (июль – сентябрь), возрастанием на порядок в весенне-летнее время и величинами численности, близкими к среднегодовым, - в осенний сезон (март – май). Наблюдаемые вариации сезонных изменений проявлялись в наличии или отсутствии резких подъемов численности в весенний период, связанных с выраженностью «цветения» микроводоросли Phaeocystis pouchetii, в длительности зимнего...
Tipo: Journal Contribution
Palavras-chave: Бактериопланктон; Численность; Биомасса; Сезонные изменения; Межгодовые вариации; Многолетний тренд; Bacterioplankton; Number; Biomass; Seasonal changes; Year-to-year variations; The long-standing trend.
Ano: 2009
URL: http://repository.ibss.org.ua/dspace/handle/99011/1083

Assessment of fish assemblages in streams of different orders in the Upper Paraná River basin, Central Brazil
Provedor de dados: 76
Autores: Vieira,Thiago B.; Tejerina-Garro,Francisco L.
The aim of this study was to test whether the richness observed and the biomass per trophic group of fish assemblages vary depending on the order (1st and 2nd) of the streams located in three different basins of the Upper Paraná River Basin, Central Brazil. Samples were collected between April and September, 2009, in 27 streams of the Meia Ponte, Piracanjuba and Santa Maria River basins. A total of 4,879 specimens were collected distributed in 59 species and 19 families. The statistical analyses carried out indicate that the observed richness and biomass of omnivore fish were influenced by the interaction of two factors: stream order and basin. The 2nd order streams located in the Santa Maria basin presented significant differences in the observed richness...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trophic guilds; Omnivores; Richness; Biomass.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000200007

Taxonomic and numeric structure of Chironomidae (Diptera) in different habitats of a Neotropical floodplain
Provedor de dados: 76
Autores: Butakka,Cristina Márcia de Menezes; Gomes,Luiz Carlos; Takeda,Alice Michiyo.
We characterized the local benthic Chironomidae by analyzing the numerical density, biomass, diversity index of Shannon-Wiener and dominance of larvae in the main channel of the Ivinhema River, in a secondary channel, in five lakes connected to the main channel and in five lakes without connection. Of the 68 taxa identified, Aedokritus sp., Tanytarsus sp., Chironomus strenzkei Fittkau, 1968 and Procladius sp.1 were found in all sampling sites and were considered morphospecies with greater of greatest ecological plasticity. Chironomus strenzkei Fittkau, 1968, contributed with the greatest biomass in the central region of lakes without connection, whereas Aedokritus sp. dominated in the littoral of lakes. The greater values of diversity indices in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chironomidae larvae; Biomass; Diversity; Dominance; Paraná River.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000300007

Como inserir crotalária em sistemas de produção de grãos.
Provedor de dados: 14
Autores: GARCIA, R. A.; STAUT, L. A.
bitstream/item/191614/1/CT-44.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Crotalária; Entressafra; Biomassa; Espaçamento; Row spacing; Biomass.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1101109

Estudo bibliométrico e análise de patentes acerca da produção de ácidos carboxílicos e álcoois a partir de açúcares: parte 2: álcoois.
Provedor de dados: 14
Autores: BRAGA, M.; FERREIRA, P. M.; OLIVEIRA, C. R. de; ALMEIDA, J. R. M. de.
Este trabalho, juntamente com o Documentos 36 (Estudo bibliométrico e análise de patentes acerca da produção de ácidos carboxílicos e álcoois a partir de açúcares - Parte 1: Ácidos carboxílicos) formam o mais completo estudo sobre a utilização da biomassa para a produção de bioquímicos renováveis realizado pela Embrapa Agroenergia. Nesta segunda parte, o tema explorado é a produção de álcoois a partir de fontes renováveis de matéria-prima. Semelhante ao que foi realizado na parte 1, são analisados dados e informações recuperadas em fontes secundárias, especialmente publicações científicas e patentárias, com o objetivo de traçar um panorama da pesquisa científica e aplicada acerca da obtenção de álcoois derivados da biomassa, bem como determinar o cenário...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Biotecnologia; Biomassa; Mercado; Biotechnology; Biomass; Carboxylic acids; Alcohols; Market analysis.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1131537

Guandu para produção de forragem e de grãos no Semiárido cearense.
Provedor de dados: 14
Autores: GUEDES, F. L.; POMPEU, R. C. F. F.; SOUZA, H. A. de; ROGERIO, M. C. P.
Avaliar o desempenho produtivo de grãos, biomassa sob condições de sequeiro do Semiárido e verificar as relações com as variáveis do sistemara dicular do guandu em região de fotoperíodo neutro.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Gramínea Forrageira; Leguminosa com Grão; Cajanus Cajan; Biomassa.; Forage grasses; Biomass; Photoperiod; Brazil.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1117099

Análise morfoagronômica e bioquímica de um painel de sorgo energia para características relacionadas à qualidade da biomassa.
Provedor de dados: 14
Autores: DAMASCENO, C. M. B.; PARRELLA, R. A. da C.; SOUZA, V. F. de; SIMEONE, M. L. F.; SCHAFFERT, R. E.
bitstream/item/101874/1/circ-190.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Sorghum bicolor; Recurso energético; Melhoramento genético vegetal; Plant breeding; Energy resources; Biomass.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/975294

Malt bagasse: combined auto-hydrolysis and enzymatic hydrolysis process for malt bagasse pretreatment.
Provedor de dados: 14
Autores: GAMBETTA, R.
Combined hydrothermal process of auto-hydrolysis and enzymatic hydrolysis as pretreatment for release of glucose from malt bagasse. The auto-hydrolysis pretreatment removes the hemicellulose and chemically modifies the lignin, facilitating the access of enzymes to the cellulose, which will be converted into glucose.
Tipo: Folders
Palavras-chave: Lignocellulosic; Malt; Bagasse; Enzymatic hydrolysis; Glucose; Biomass.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133100

Uso integral da floresta para fins energéticos.
Provedor de dados: 14
Autores: CASTRO, A. W. V. de.
Faz um alerta aos técnicos e pessoas ligadas ao setor florestal sobre o potencial madeireiro existente na região para aproveitamento energético e que está sendo desperdiçado. Aborda: composição florística nacional; a floresta Amazaaõnica como fonte de energia; uso integral da árvore para produção de energia; componentes da árvore; resíduos florestais e aproveitamento para fins energéticos; coleta e densificação de resíduos; poder calorífico de resíduos florestais; equipamentos para queima de resíduos; uso integral da arvore e seus efeitos na fertilidade do solo; composição da fitomassa florestal; Empresas que vem utilizando a árvore integral.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Recurso Florestal; Resíduo Orgânico; Recurso Energético; Biomassa; Forest resources; Organic wastes; Energy resources; Biomass.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/698074

Identificação e compatibilidade de espécies herbáceas nativas e BRS Piatã (Brachiaria Brizantha Cv. Piatã).
Provedor de dados: 14
Autores: OLIVEIRA, L. B. de; CAVALCANTE, A. C. R.; MESQUITA, T. M. O.; ALVES, M. M. A.; SOUZA, E. B. de; LEITE, E. R.
O objetivo deste trabalho foi avaliar a compatibilidade entre uma gramínea exótica e o pasto nativo, através da produção de biomassa dos componentes do pasto e da identificação da presença de espécies de dicotiledôneas herbáceas, em uma área cultivada com BRS Piatã manejado sob diferentes graus dia.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Variedade Piatã; Semiárido; Espécie exótica; Compatibilidade; Espécie herbácea; Browse plants; Dicotyledons; Feed crops; Indigenous organisms.; Brachiaria Brizantha; Gramínea forrageira; Pastagem nativa; Caatinga; Biomassa; Espécie nativa; Dicotiledônea; Forragem; Herbaceous plants; Biomass; Brazil; Semiarid zones; Forage.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1041847

Uso de parâmetros microbiológicos como indicadores para avaliar a qualidade do solo e a sustentabilidade dos agroecossistemas.
Provedor de dados: 14
Autores: MENDES, I. de C.; REIS JUNIOR, F. B. dos.
ABSTRACT: Every factor that has a negative impact on soil microorganisms sooner or later will reflect in a deterioration of soil chemical and physical properties specially, those related to soil organic matter losses. This paper was based on a talk presented at "The International Symposium of Indicators of Soil Quality" held on Marco Juarez-Argentina. Some of the aspects related to the concept of soil quality and biological indicators of soil quality, were reviewed. Results of the studies related to the characterization of soil microbial biomass, respiration and enzymes activities on different agroecosystems of the Cerrado region also are presented. Soil microbial biomass, microbial respiration, and the activities of soil enzymes (acid phosphatase,...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Biiomassa; Microbial flora; Enzymic activity.; Atividade Enzimática; Bioquímica do Solo; Cerrado; Microbiologia do Solo; População Microbiana.; Biochemistry; Biomass; Microbiology; Soil.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569604

Aproveitamento de resíduos agroindustriais: uma abordagem sustentável.
Provedor de dados: 14
Autores: VAZ JUNIOR, S.
A produção agropecuária é uma das mais importantes atividades socioeconômicas humanas, uma vez que visa à produção de alimentos, fibras e bioenergia. Mais recentemente a agropecuária passou também a prover matérias-primas diversas para produção de novos bioprodutos e bioinsumos, naquilo que se convencionou chamar de economia circular ou bioeconomia. Isso somente foi possível pelo constante avanço científico-tecnológico que permitiu o desenvolvimento de novas biomassas assim como de novos processos industriais para aproveitamento de culturas dedicadas e também daquilo que outrora era chamado de resíduo. Para se ter uma ideia da dimensão de tal atividade, dados recentes estimam que a produção agrícola mundial seja da ordem de 7,26 Gt, e que o volume de...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Economia circular; Bioeconomia; Biomassa vegetal; Biomassa agrícola; Sustentabilidade; Biomassa; Resíduo Agrícola; Matéria Prima; Biomass; Bioeconomics; Sustainable agriculture; Agricultural wastes.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1126255

Ciclagem de carbono em ecossistemas terrestres: o caso do cerrado brasileiro.
Provedor de dados: 14
Autores: ADUAN, R. E.; VILELA, M. de F.; KLINK, C. A.
ABSTRACT: In the Cerrado Biome, the internal carbon cycling, the main carbon pools size, and the fluxes intensity between carbon pools are far from to be completely understood. This study presents the main carbon pools and cycling fluxes in terrestrial ecosystems, emphasizing the neotropical savannas. This study will also review literature of internal carbon cycling in the Cerrado. In spite of the science advances, the knowledge of internal carbon dynamics in the Cerrado are scarce. The relation between the carbon pools size and fluxes intensity and the Cerrado's vegetation phytofisionomies, soil gradient, and climate still remains unknown. The carbon pools and fluxes data analysis show that the Cerrado's aerial carbon pools are smaller than the forest...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fluxo de carbono; Carbon fluxes; Carbon cycling.; Biomassa; Cerrado; Matéria Orgânica; Serapilheira; Solo.; Biomass; Organic matter; Soil.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569012

Propriedades biologicas em agregados de um LE sob plantios convencional e direto no Cerrado.
Provedor de dados: 14
Autores: MENDES, I. de C.; SOUZA, L. V. de; RESCK, D. V. S.; GOMES, A. C.
bitstream/CPAC-2009/24609/1/bolpd_33.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Microbial flora; Enzymic activity; Enzimes.; Atividade Enzimática; Biomassa; Carbono; Cerrado; Enzima; Fosfatase Ácida; Manejo do Solo; Microbiologia do Solo; População Microbiana; Solo.; Acid phosphatase; Carbon; Biomass; Soil biology; Soil; Soil management.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/559745

Potencial de remoção de metais pesados em água subterrânea por meio de adsorção usando biomassa seca de plantas aquáticas como adsorventes naturais.
Provedor de dados: 14
Autores: TAVARES, S. R. de L.; OLIVEIRA, S. A. de.
O processo de remediação de solos e águas subterrâneas contaminados se refere à redução dos teores de contaminantes em níveis seguros e compatíveis com a proteção à saúde humana, impedindo ou dificultando a disseminação de substâncias nocivas ao ambiente. Atualmente, existe uma tendência mundial de dar preferência às técnicas de remediação in situ, por apresentarem baixos custos e não provocarem contaminações secundárias. Quando as águas subterrâneas estão contaminadas por metais pesados, a tecnologia de barreira reativa é usualmente empregada no aquífero contaminado. Este trabalho teve por objetivo avaliar a potencialidade do uso de biomassa morta de macrófitas como um material sorvente em barreiras reativas permeáveis na remediação de água subterrânea...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Resíduo Quimico; Metal Pesado; Água do Solo; Biomassa; Solo; Contaminação; Chemical residues; Heavy metals; Biomass.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/950831

Macauba: Extraction process of macauba pulp oil by aqueous method.
Provedor de dados: 14
Autores: FAVARO, S. P.
Extraction process of macauba pulp oil from fresh fruits by aqueous route. The technology consists of mixing the pulp in water followed by oil extraction by a mechanical process.
Tipo: Folders
Palavras-chave: Macaúba; Pulp; Biomass.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133079

Biomassa C e atividade microbiana em solos de cerrado sob plantio direto e plantio convencional.
Provedor de dados: 14
Autores: MENDES, I. de C.; CARNEIRO, R. G.; CARVALHO, A. M. de; VIVALDI, L.; VARGAS, M. A. T.
bitstream/item/102879/1/pesq-05.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Microbial flora; Zero tillage.; Biomassa; Cerrado; Manejo do Solo; População Microbiana.; Plantio; Plantio Direto; Biomass; Soil management.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/545864

Uso de leguminosas para produção de biomassa.
Provedor de dados: 14
Autores: MÜLLER, N. R. M.; MÜLLER, A. A.; OLIVEIRA, R. P. de.
bitstream/item/63469/1/Doc67-p111.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Avaliação; Produção de biomassa; Propriedade físico-química do solo; Capitão-Poço; Bragança; Belém; Pará; Brasil; Evaluation; Soil chemicophysical properties.; Leguminosa.; Amazonia; Biomass; Legumes.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/394894

Árvores e arbustos do sistema agrossilvipastoril caprinos e ovinos.
Provedor de dados: 14
Autores: CAMPANHA, M. M.; ARAÚJO, F. S. de.
bitstream/item/29100/1/UMT-Doc-96.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Sistema agrossilvipastoril; Levantamento florÌstico; Árvore; Caatinga; Arbusto; Biomassa; Biodiversidade; Planta lenhosa; Woody plants; Biomass; Biodiversity.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/880056

Estudo prospectivo de tecnologias baseadas na biomassa de microalgas e cianobactérias: abordagens bibliométrica e patentométrica.
Provedor de dados: 14
Autores: SCHULTZ, E. L.; QUINTINO, R. P.; ANJOS, S. S. N. dos.
A Embrapa Agroenergia possui seis Linhas de Atuação, as quais correspondem às seis plataformas industriais de biorrefinarias: (i) açúcares C5/C6, (ii) óleos vegetais, (iii) biogás, (iv) algas, v) lignina e vi) bio-óleo/syngas. O objetivo geral deste estudo é identificar, por técnicas de patentometria e bibliometria, as tecnologias baseadas no uso da biomassa de microalgas e cianobactérias, no contexto mundial. Os resultados obtidos geraram diversas informações de cunho estratégico, como os principais processos que utilizam microalgas e cianobactérias, bem como os produtos obtidos e os gêneros taxonômicos usados. Além disso, os principais campos tecnológicos encontrados em documentos de patente foram mostrados e analisados, incluindo o mapa de emergência e...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Bibliometria; Cianobactéria; Patentometria; Estudo prospectivo; Microalga; Patente; Pesquisa; Biomassa; Microalgae; Cyanobacteria; Bibliometric analysis; Patents; Biomass.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1134493

Biomassa vegetal em agroecossistema de seringueira consorciada com cacaueiro no nordeste paraense.
Provedor de dados: 14
Autores: TEIXEIRA, L. B.; BASTOS, J. B.; OLIVEIRA, R. F. de.
Nos diversos compartimentos do agroecossistema de seringueira com cacaueiro, foram avaliados os estoques de materia organica e a quantificacao da biomassa vegetal. O estudo foi realizado em parcela de consorcio de seringueira com cacaueiro, com quinze anos de idade, instalado no Campo Experimental do Centro de Pesquisa Agroflorestal da Amazonia Oriental-CPATU, localizado no Km 40 da rodovia PA253, em Capitao Poco, PA. A quantificacao das fitomassas de seringueira e de cacaueiro foi realizada em junho de 1991, em cinco plantas de cada cultura do total de 140 plantas de seringueira e 960 plantas de cacaueiro por hectare. Em cada planta foram avaliados ramos, caule, folhas e raizes (pivotante, grossas e finas), estas ate um metro de profundidade no solo. O...
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Consorciacao; Disponibilidade; Liteira; Nordeste; Pará; Brasil; Rubber tree; Cocoa; Organic mater; Disponibility; Litter.; Cacau; Biomassa; Matéria Orgânica; Seringueira.; Amazonia; Biomass; Intercropping.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379038

Produção de biomassa e fornecimento de nutrientes de plantas tropicais úteis selecionadas.
Provedor de dados: 14
Autores: SCHMIDT, P.; LIEBEREI, R.; PREISINGER, H.; BAUCH, J.; GASPAROTTO, L.
Determinacao da producao de biomassa e das reservas de nutrientes de plantas tropicais uteis. Paralelamente, foi analisada a disponibilidade de nutrientes no solo. Esses experimentos podem permitir avaliar a forma mais viavel de crescimento sustentavel dos sistemas de plantio sob as condicoes prevalentes dos sitios. Sao apresentados preliminares.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Florestal tropical umida; Agrofloresta; Arvore rutifera; Derioracao do solo; Brasil; Amazonas; Reclamation; Sustainability; Biomassa; Conservação do Solo; Cultivo Multiplo; Desenvolvimento Sustentável; Essência Florestal; Fertilidade do Solo; Nutriente; Recuperação do Solo; Agroforestry; Biomass; Forest trees; Fruit trees; Multiple cropping; Soil conservation; Soil fertility.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667461

Atividade enzimática de um latossolo vermelho de cerrado sob sistemas integrados lavoura-pastagens.
Provedor de dados: 14
Autores: SILVA, L. G.; MENDES, I. de C.; ROLIM, L. F. S.; SANTOS, A. B.; REIS JÚNIOR, F. B.; VILELA, L.
bitstream/CPAC-2009/26830/1/p2005_38.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Microbial flora.; Bioquímica do Solo; Biomassa; Cerrado; Enzima; Microbiologia do Solo; População Microbiana.; Biochemistry; Biomass; Enzymes; Microbiology; Soil.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569446

Ocorrência, biomassa, perdas e exploração de bambu em florestas da Amazônia no Acre, Brasil.
Provedor de dados: 14
Autores: CARMO, L. F. Z. do; AMARAL, E. F. do; BARDALES, N. G.
Por meio deste trabalho, objetivou-se detalhar a ocorrência de bambu no Estado do Acre, de acordo com o percentual de participação em cada tipologia florestal, além de calcular o incremento de biomassa, avaliar a intensidade de perda e avaliar o potencial de exploração do bambu, segundo as condições de acessibilidade. Para tanto, utilizou-se análises por geoprocessamento com bases cartográficas de diferentes temáticas, inventários vegetacionais e dados de biomassa florestal, usando álgebra de mapas. Observou-se que a ocorrência de bambu no Acre está concentrada em oito tipologias florestais, que aparecem em maior proporção na região central do estado, ocupando cerca de 28% do território acreano. Ao considerar o bambu não como componente florestal, mas sim...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Potencial de exploração; Exploration potential; Potencial de explotación; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Sistemas de información geográfica.; Bambués; Biomasa; Especies nativas; Guadua spp; Bambu; Espécie nativa; Biomassa; Cartografia; Sistema de informação geográfica; Bamboos; Indigenous species; Biomass; Cartography; Geographic information systems.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1081854

Experiencias com o uso da Gliricidia sepium na alimentacao animal no Nordeste brasileiro.
Provedor de dados: 14
Autores: RANGEL, J. H. de A.; CARVALHO FILHO, O. M.; ALMEIDA, S. A.
A produtividade animal no Nordeste brasileiro e afetada por fatores limitantes ao desenvolvimento das pastagens ali existentes. A zona semi- rida tem como principal fator limitante um acentuado déficit hidrico na maioria dos meses do ano. A zona dos tabuleiros costeiros, apesar de apresentar precipitacoes mais abundantes, possui solos que, em sua maioria, sao de baixa fertilidade natural e apresentam, bem próximo da superfície, uma camada de impedimento a penetracao da agua e ao crescimento das raízes. As condições pluviometricas mais favoráveis dos tabuleiros costeiros levam os pecuaristas a optar por um uso bem mais intenso de suas pastagens que, não acompanhado por praticas de manejo que visem a estabilidade das mesmas, levam a um quantitativo crescente...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Alimentacao animal; Sistema agroflorestal; Nordeste; Northeast; Biomassa; Planta Forrageira; Gliricidia sepium; Animal feeding; Biomass; Forage.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134520

Associação de espécies florestais com forrageiras para ocupação de áreas degradadas.
Provedor de dados: 14
Autores: MARQUES, L. C. T.; VEIGA, J. B. da; SERRAO, E. A. de S.; CARDOSO, E. M. R.; YARED, J. A. G.; UHL, C.
bitstream/item/57383/1/CPATU-PA145.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Sistema agrosilvipastoril; Recuperação de área degradada; Avaliação de biomassa; Paragominas; Pará; Brasil; Agrosilvopastoril systems; Reclamation.; Composição Botânica.; Amazonia; Environmental degradation.; Biomass; Botanical composition.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381331

Indicadores biológicos associados ao ciclo do fósforo em solos de cerrado utilizando plantio direto e plantio convencional.
Provedor de dados: 14
Autores: CARNEIRO, R. G.; MENDES, I. de C.; LOVATO, P. E.; CARVALHO, A. M. de; VIVALDI, L. J.
RESUMO: O objetivo deste trabalho foi avaliar a influência do plantio direto, do preparo convencional do solo e de plantas de cobertura sobre indicadores biológicos associados ao ciclo do fósforo (P). O trabalho foi realizado em três áreas adjacentes, num Latossolo Vermelho-Amarelo, distribuídas da seguinte maneira: área I, dois anos de experimentação, comparando esses sistemas de plantio; área II, seis anos de experimentação e área III, Cerrado nativo. Em julho/1998 e janeiro/1999, avaliaram-se: o P da biomassa, populações de fungos e bactérias totais e solubilizadores de fosfato e a atividade da fosfatase ácida, nas profundidades de 0-5 e de 5-20 cm. A atividade da fosfatase e a ocorrência de fungos e bactérias solubilizadoras nas áreas com plantio...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Plantio convencional; Zero tillage; Microbial flora; Cover plants; Solubilizing.; Biomassa; Biologia do Solo; Cerrado; Fosfatase Ácida; Fosfato; População Microbiana; Planta de Cobertura; Plantio Direto; Solubilização.; Acid phosphatase; Conventional tillage; Biomass; Phosphates; Soil biology.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569003

Biomassa e ciclagem de nutrientes por especies de adubos verdes na regiao do cerrado.
Provedor de dados: 14
Autores: SOUSA JUNIOR, J. G. de A.; CARDOSO, A. N.; CARVALHO, A. M.; TOFETI, A. R.
bitstream/CPAC-2009/24357/1/p2002_17.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Adubo Verde; Adubação; Biomassa; Cerrado; Manejo do Solo.; Fertilizers; Biomass; Green manures; Soil management.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/564024

Parâmetros qualitativos de genótipos de capim elefante (Pennisetum purpureum Schum.) estudados para a produção de energia através da biomassa.
Provedor de dados: 14
Autores: QUESADA, D. M.; BODDEY, R. M.; REIS, V. M.; URQUIAGA, S.
bitstream/CNPAB-2010/32086/1/cit008.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Elephant grass; Production.; Biomassa; Capim Elefante; Energia; Gramínea Forrageira; Produção.; Forage grasses.; Biomass; Energy.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/627821

Imobilização de glicose oxidase para a síntese de ácidos aldônicos.
Provedor de dados: 14
Autores: VAZ JUNIOR, S.; RODRIGUES, D. de S.; GONCALVES, S. B.; ALMEIDA, J. R. M. de; CARVALHO, W.; PACHECO, T. F.
Os ácidos aldônicos — glicônico e xilônico — estão entre as moléculas de alto valor agregado que podem ser obtidas a partir de biomassa lignocelulósica e apresentam elevado potencial de aplicação comercial em diferentes campos. A síntese de ácidos aldônicos é possível por meio de diferentes processos, como: químico, eletroquímico, microbiano e enzimático. Porém, independentemente da opção escolhida, ainda existem vários obstáculos para que a produção em larga escala seja bem estabelecida. Entre esses obstáculos, está o desenvolvimento de um catalisador eficaz e estável para a síntese dos ácidos aldônicos a partir de hidrolisados de biomassa lignocelulósica, cuja composição apresenta, além dos monômeros de interesse (glicose e xilose), um grande número de...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Biocatalisador; Ácidos aldônicos; Biocatálise; Reator de leito fixo; Ácido glicônico; Ácido xilônico; Glicose oxidase; Catalisador; Green chemistry; Biocatalysis; Biomass; Glucose oxidase.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1124141

Feijão-de-porco leguminosa para adubação verde e cobertura de solo.
Provedor de dados: 14
Autores: LOPES, O. M. N.
bitstream/item/34710/1/RecBas-37.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cobertura de solo; Caracteristica agronomica; Producao de biomassa; Producao de semente; Brasil; Cover plants; Agronomic chacteristics.; Adubação Verde; Canavalia Ensiformis; Feijão de Porco; Nutriente.; Amazonia; Green manures; Biomass; Nutrients.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375234

Efeito de diferentes sistemas de manejo no nitrogenio e no carbono da biomassa microbiana em um latossolo vermelho-escuro no cerrado.
Provedor de dados: 14
Autores: FIGUEIREDO, C. C. de; RESCK, D. V. S.; GOMES, A. C. RAMOS, M. L. G.; FERREIRA, E. A. B.
bitstream/CPAC-2009/24148/1/p2002_33.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Microbial flora.; Biomassa; Cerrado; Manejo do Solo; Microbiologia do Solo; População Microbiana.; Biomass; Soil management.; Soil biology.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567455

Produção de biomassa de banana verde.
Provedor de dados: 14
Autores: SENA, L. de O.; VIANA, E. de S.; REIS, R. C.; BARRETO, N. S. E.; SANTANA, T. S. de; JESUS, J. L. de.
bitstream/item/211941/1/ComunicadoTecnico171-Eliseth-AINFO.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Banana; Biomassa; Biomass.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1121314

Microalgae: production of beta-carotene by microalgae.
Provedor de dados: 14
Autores: MIRANDA, C. H. B.
Halophilic microalgae strain of the genus Dunaliella, isolated from Brazilian marine coastal waters, hyperproducer of beta-carotene in saline medium.
Tipo: Folders
Palavras-chave: Microalga; Pigmento; Microalgae; Dunaliella; Beta-carotene; Biomass.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1132971

Dinamica do carbono da biomassa microbiana em cinco profundidades de um latossolo no cerrado sob diferentes sistemas de manejo.
Provedor de dados: 14
Autores: FERREIRA, E. A. B.; RESCK, D. V. S.; GOMES, A. C.; RAMOS, M. L. G.
bitstream/CPAC-2009/24364/1/p2002_29.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Biomassa; Cerrado; Manejo do Solo; Matéria Orgânica; Química do Solo; Solo.; Biomass; Organic matter; Soil chemistry; Soil; Soil management.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567663

Perspectivas para áreas de capoeira em solos de baixa fertilidade. Município de Theobroma - Rondônia.
Provedor de dados: 14
Autores: RODRIGUES, V. G. S.; CASTILLA, C.; COSTA, R. S. C. da; SOUZA, V. F. de.
Este trabalho avalia o efeito de capoeiras melhoradas com espécies leguminosas, quanto à produção de biomassa após o corte e queima das leguminosas e a produtividade de arroz, durante duas safras consecutivas.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Theobroma (RO); Rondônia; Amazônia Ocidental; Western Amazon; Fertilidade do Solo; Capoeira; Biomassa; Arroz; Oryza Sativa; Soil fertility; Biomass.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/901901

Biomassa microbiana do solo.
Provedor de dados: 14
Autores: REIS JÚNIOR, F. B. dos; MENDES, I. de C.
ABSTRACT: The microbial biomass, respiration and their derivative indexes are proposed as indicators of the state and changes of the soil organic matter. This document presents basic information about these indicators and the two methodologies most used for C-microbial biomass determinations, the fumigation-incubation and the fumigation-extraction methods. The basic principles behind these methods, advantages, disadvantages and limitations are discussed. As then main objective of this review, recent results from research in this field developed at the Embrapa Cerrados are presented.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Microbial flora; Incubation.; Biomassa; Carbono; Fumigação; Incubação; Microbiologia do Solo; População Microbiana.; Biomass; Fumigation; Microbiology; Soil.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/572256

Water and nutrient fluxes as indicators for the stability of different land use systems on the terra firme near Manaus.
Provedor de dados: 14
Autores: SHIFT PROJECT ENV 45 (Manaus-AM).
This is the third annual report of the project summarizing the results of 1997. The results of the biomass determination and nutrient uptake are included which were conducted during 1996/97. First results from stand hydrology (stemflow, throughfall) and soil nitrogen dynamics are incorporated. The report is devided into two parts. In the main part, the project team is presented and is activities throughout the year 1997 are briefly summarized. The annexes give detailed information on selected research activities of the project. The research programme could be conducted according to the schedule outlined in previous report. This detailed and integrated analyses of the soil nutrient and water dynamics is yet to be done. This will involve mathematical...
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Amazonas; Manaus; Tropical rain forest; Água; Balanço Hídrico; Biomassa; Floresta Tropical Úmida; Nutriente; Solo; Transporte de Nutriente; Uso da Terra; Biomass; Land use; Nutrient uptake; Nutrients; Soil; Water; Water balance.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667941

Matéria orgânica nos ecossistemas de floresta primária e pastagens na Amazônia Central.
Provedor de dados: 14
Autores: TEIXEIRA, L. B.; BASTOS, J. B.
bitstream/item/31996/1/CPATU-BP99.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Nitrogenio total; Campo experimental de Zootecnia da UEPAE Manaus; Amazonas; Brasil; Forest; Ecosystem; Pasture; Kykuyo grass; Total nitrogen.; Brachiaria Humidicola; Biomassa; Capim Quicuio; Ecossistema; Floresta; Matéria Orgânica; Pastagem.; Amazonia; Biomass; Organic matter.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381129

Biomassa vegetal e carbono orgânico em capoeiras e agroecossistemas no Nordeste do Pará.
Provedor de dados: 14
Autores: TEIXEIRA, L. B.; OLIVEIRA, R. F. de.
bitstream/item/34390/1/ORIENTAL-BP6.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Distribuicao de biomassa; Disponibilidade do carbono organico; Sistema agrosilvipastoril; Castanha do brasil; Pará; Agrosilvopastoral systems.; Cacau; Brachiaria Humidicola; Capoeira; Consorciação de Cultura; Theobroma Cacao.; Brazil nuts; Biomass; Brazil; Carbon; Intercropping; Secondary forests.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377216

Crescimento e matéria seca da Crotalaria juncea L. em diferentes sistemas de preparo de solo.
Provedor de dados: 14
Autores: JUREMEIRA, J. S.; KURIHARA, C. H.; STAUT, L. A.; TOMAZI, M.; SILVA, C. J. da.
bitstream/item/189941/1/ORAL11.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Produtividade; Solo; Biomassa; Adubação Verde; Plantio Direto; Crotalária; Seed productivity; Biomass; Green manures; No-tillage.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103260

Avaliação agronômica de plantas de cobertura para o sistema plantio direto de soja na região Central de Minas Gerais.
Provedor de dados: 14
Autores: BORGHI, E.; PARRELLA, R. A. da C.; ABREU, S. C.; KARAM, D.; GONTIJO NETO, M. M.; RESENDE, A. V. de; ALVARENGA, R. C.
A escolha da planta de cobertura para ser utilizada no Sistema Plantio Direto (SPD) deve apresentar características agronômicas que possibilitem a rotação de culturas e a cobertura do solo por maior período de tempo possível. Na região Central de Minas Gerais, a sustentabilidade do SPD está justamente na escolha da espécie que atenda a estes requisitos, em razão das condições climáticas, buscando selecionar culturas que possibilitem alta produtividade de matéria seca e de baixa velocidade de decomposição. Este trabalho objetivou avaliar o crescimento, acúmulo diário e a produtividade de matéria seca de diferentes espécies destinadas exclusivamente para cobertura de solo e a produtividade da cultura da soja semeada na sequência. Foram utilizadas quatro...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Déficit hídrico; Tropical foragers; Planta de Cobertura; Rotação de Cultura; Sorgo; Soja; Planta Forrageira; Cobertura do Solo; Biomassa; Forrageira Tropical; Ground cover plants; Soil water deficit; Biomass.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1134591

Carbono da biomassa microbiana e atividade biologica em solos sob sistemas integrados de culturas anuais e pastagens.
Provedor de dados: 14
Autores: OLIVEIRA, J. R. A.; MENDES, I. de C.; VILELA, L.; VIVALDI, L. J.; VARGAS, M. A. T.
bitstream/item/107043/1/pesq-35.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Biomassa; Carbono; Cerrado; Pastagem; Solo.; Biomass; Carbon; Pastures.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546330

Ração de peixes: processo integrado de produção de cogumelo e ração de peixe a partir de resíduos da agroindústria de palma de óleo.
Provedor de dados: 14
Autores: SIQUEIRA, F. G. de.
Processo integrado de produção de cogumelos comestíveis Pleurotus ostreatus e de insumos para formulação de ração de peixe com utilização de biomassas vegetais residuais da agroindústria de palma de óleo (dendê). O conceito de integração se refere à produção em biomassa residual de cogumelos destinados à alimentação humana, com aproveitamento do substrato de seu cultivo (SMS) para formulação de ração de peixe.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Peixe; Ração; Cogumelo Comestível; Biomassa; Biomass; Mushrooms; Fish feeds.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1126434

Enzymes: Production of lipase by a bacterial strain.
Provedor de dados: 14
Autores: SALUM, T. F. C.
Bacterial strain from Brazilian biodiversity able to produce lipases that can be applied in different industries.
Tipo: Folders
Palavras-chave: Bacterial strain; Lípase; Biomass; Fermentation.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133001

Processo de redestilação para elevar a concentração do safrol em óleo essencial de pimenta longa.
Provedor de dados: 14
Autores: PIMENTEL, F. A.
O elevado potencial da flora odorífera da Amazônia apresenta-se como a fonte renovável mais apropriada para obter essências aromáticas, tornando-se necessário, portanto, promover a domesticação das espécies identificadas como economicamente promissoras. No trabalho de pesquisa e desenvolvimento da Embrapa Acre, identificou-se a pimenta longa como uma alternativa de renda para a agricultura familiar, na produção comercial de óleo essencial rico em safrol. As tecnologias nas áreas fitotécnicas e agroindustriais desenvolvidas pela Embrapa Acre propiciam um sistema de produção ambiental, social e economicamente viável. Entretanto, faz-se necessário o refinamento tecnológico em algumas etapas do processo, dentre as quais ressalta-se o beneficiamento da biomassa...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Coobação; Embrapa Acre; Rio Branco (AC); Amazônia Ocidental; Western Amazon; Amazonia Occidental; Secado.; Safrol; Production; Essential oil; Biomasa; Aceites essenciales; Destilación; Piper hispidinervum; Secagem artificial.; Pimenta longa; Biomassa; Adoção de Inovações; Destilação; Produção; Óleo essencial; Piper longum; Distillation; Biomass; Drying.; Safrole.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/500864

Soil termites in primary forest, secondary forest and an agroforestry plantation system in central Amazonia.
Provedor de dados: 14
Autores: MARTIUS, C.; GOMES, E.; GARCIA, M. V. B.
Litter and soil termites were collected with soil cores (21cm diameter) in a primary forest site, a secondary forest site and two sites of a polyculture plantation system in central Amazonia (Brazil), in three-monthly intervals from 1997 to 1999. Termite genus diversity, abundance and biomass all were highest in the primary forest. The values in the secondary forest were half those of the primary forest, and they were lowest in the plantation systems, indicating that the latter sites may suffer from functional constraints concerning the process of organic residue decomposition.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Brasil; Amazonas; Manaus; Tropical rain forest; Agrossilvicultura; Biomassa; Cultivo Multiplo; Cupim de Montículo; Decomposição; Fauna Edáfica; Floresta Tropical Úmida; Isoptera; Matéria Orgânica; Serapilheira; Termitidae; Agroforestry; Biomass; Degradation; Forest litter; Multiple cropping; Organic matter; Soil fauna.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/669561

Indicadores ambientais na avaliação de sistemas de uso da terra.
Provedor de dados: 14
Autores: SILVA, L. G. T.; SILVA, B. N. R. da.
bitstream/item/35673/1/doc135.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Propriedade fisico-quimica do solo; Fator ambiental; Ecologia agricola; Brasil; Soil chemicophysical properties; Alternative agriculture.; Biomassa; Propriedade Rural; Uso da Terra.; Amazonia; Biomass; Environmental factors; Land ownership; Land use.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374411

Dinamica do carbono da biomassa microbiana em cinco epocas do ano sob diferentes sistemas de manejo do solo no cerrado.
Provedor de dados: 14
Autores: FERREIRA, E. A. B.; RESCK, D. V. S.; RAMOS, M. L. G.; GOMES, A. C.
bitstream/CPAC-2009/24335/1/p2002_30.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Biomassa; Cerrado; Manejo do Solo; Matéria Orgânica; Química do Solo; Solo.; Biomass; Organic matter; Soil chemistry; Soil; Soil management.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567630

Biomassa microbiana e atividade enzimatica em solos de Cerrado e sistemas agricolas anuais e perenes na regiao de Primavera do Leste/MT.
Provedor de dados: 14
Autores: MATSUOKA, M.; MENDES, I. de C.; LOUREIRO, M. de F.
bitstream/CPAC-2009/24610/1/bolpd_34.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Enzimic activity; Microbial flora.; Atividade Enzimática; Biomassa; Bioquímica do Solo; Carbono; Cerrado; Fosfatase Ácida; Microbiologia do Solo; População Microbiana; Solo.; Acid phosphatase; Biochemistry; Biomass; Carbon; Soil; Soil biology.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/559753

Estudo bibliométrico e análise de patentes acerca da produção de ácidos carboxílicos e álcoois a partir de açúcares: parte 1: ácidos carboxílicos.
Provedor de dados: 14
Autores: BRAGA, M.; FERREIRA, P. M.; LOPES, C. L.; BELÉM, D. DE L.; ALMEIDA, J. R. M. de.
Esta publicação é o primeiro produto do trabalho do Setor de Prospecção e Avaliação de Tecnologias (SPAT) da Embrapa Agroenergia e trata da plataforma industrial de açúcares C5/C6, mais especificamente sobre as principais classes de produtos derivados dessas matérias-primas: os ácidos carboxílicos e álcoois. O objetivo geral do trabalho é determinar, com o uso de ferramentas bibliométricas, o cenário tecnológico atual da produção de ácidos carboxílicos (Parte 1) e álcoois (Parte 2), a partir da biomassa lignocelulósica, bem como avaliar o cenário mercadológico dos produtos em questão.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Ácidos carboxílicos; Álcoois de cadeia curta; Biomassa lignocelulósica; Bibliometria; Biotecnologia; Biomassa; Mercado; Biotechnology; Biomass; Carboxylic acids; Alcohols; Market analysis.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1131165

Malt bagasse: Alkaline pretreatment and enzymatic hydrolysis to release glucose from malt bagasse.
Provedor de dados: 14
Autores: RODRIGUES, D. de S.
Alkaline pretreatment process followed by enzymatic hydrolysis for release of glucose from malt bagasse. The alkaline pretreatment promotes biomass delignification, exposing the cellulose fibers, making them accessible to enzymatic action. A maximum conversion of cellulose into glucose (74%) was achieved when sodium hydroxide was used at a concentration of 4% (w/v).
Tipo: Folders
Palavras-chave: Alkaline pretreatment; Lignocellulosic; Malt; Bagasse; Glucose; Hydrolysis; Biomass; Renewable resources.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133093

Crescimento de plantas de soja em função da redução da densidade de semeadura e sua relação com a Produtividade.
Provedor de dados: 14
Autores: BALBINOT JUNIOR, A. A.; FERREIRA, A. S.; WERNER, F.; SILVA, M. A. de A. e; ZUCARELI, C.
O objetivo deste trabalho foi avaliar o crescimento de duas cultivares de soja durante o ciclo de desenvolvimento, em função da redução na densidade de semeadura, e verificar a sua relação com a produtividade. Foi conduzido um experimento de campo nas safras 2016/17 e 2017/18, em Londrina, PR. O delineamento experimental foi de blocos completos casualizados, com cinco repetições e esquema fatorial 2 x 5. O primeiro fator se consistiu de duas cultivares de soja, BRS 1010IPRO e NS 5959IPRO e o segundo por cinco densidades de semeadura: 100, 80, 60, 40 e 20% da quantidade de sementes indicada pelo obtentor das cultivares. Em geral, não houve diferenças expressivas de biomassa acumulada durante o ciclo de desenvolvimento entre as densidades de 100, 80 e 60% do...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Soja; Densidade de Semeadura; Pratica Cultural; Biomassa; Soybeans; Biomass; Biomass production.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1099933

Cana-de-açúcar: variedade de cana-de-açúcar com maior digestibilidade da parede celular.
Provedor de dados: 14
Autores: MOLINARI, H. B. C.
Cana-de-açúcar geneticamente modificada com maior digestibilidade da parede celular. A tecnologia visa melhorar a biomassa vegetal para produção de etanol celulósico (2G), ração animal e compostos químicos de alto valor agregado.
Tipo: Folders
Palavras-chave: Cana de Açúcar; Biomassa; Genética Vegetal; Melhoramento Genético Vegetal; Plant genetics; Biomass.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1126432

Biomassa-C e atividade microbiana em solos do bioma cerrado sob vegetacao nativa.
Provedor de dados: 14
Autores: MENDES, I. de C.; VIVALDI, L.; OLIVEIRA, J. R. A. de; VARGAS, M. A. T.; RIBEIRO, J. F.
bitstream/item/107039/1/pesq-04.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Planta nativa; Indigenous organisms; Microbial flora.; Biomassa; Cerrado; População Microbiana; Solo.; Biomass; Soil.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/545865

Mineralização de nitrogênio e biomassa microbiana em solos de mata de galeria: efeito do gradiente topográfico.
Provedor de dados: 14
Autores: PARRON, L. M.; BUSTAMANTE, M. M. da C.; PRADO, C. L. C.
RESUMO: A disponibilidade de nitrogênio (N) inorgânico para as plantas, geralmente, depende da taxa de mineralização da matéria orgânica. A biomassa microbiana, além de indicadora da qualidade do solo, está relacionada à disponibilização de nutrientes. Este trabalho objetivou determinar as taxas de mineralização líquida de N e o carbono da biomassa microbiana (CBM) em solos, em um gradiente topográfico de Mata de Galeria no Distrito Federal, por 12 meses. O gradiente comporta três comunidades florísticas: úmida (margem do córrego), intermediária e seca (borda da mata), nas quais a produção líquida de N inorgânico foi 81,5; 29,2 e 25,3 kg N ha (elevado a -1) ano (elevado a -1), respectivamente. A quantidade de N-NO3- disponível na comunidade úmida foi 0,69...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Microbial flora.; Biomassa; Cerrado; Nitrogênio; Nitrificação; Mineralização; Microbiologia do Solo; População Microbiana; Umidade do Solo.; Solo; Biomass; Mineralization; Nitrification; Nitrogen; Soil water content.; Soil biology; Soil.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568114

Biomassa para química verde.
Provedor de dados: 14
Autores: VAZ JUNIOR, S.
A necessidade de desenvolvimento de novas matérias-primas renováveis para a química, em substituição ao petróleo, tem se mostrado como um desafioo estratégico para o século XXI. Neste contexto, o uso dos diferentes tipos de biomassa vegetal - amilácea, lignocelulósica, oleaginosa e sacarídea - pode se consolidar tanto como uma alternativa de uso de matérias-primas mais baratas e menos poluentes, bem como um modelo de agregação de valor econômico às cadeias agroindustriais, como as da soja, cana-de-açúcar, milho, florestas, entre outras. Tais linhas de ação poderão, sobretudo, contribuir para a sustentabilidade dos processos de produção de diferentes tipos de produtos químicos orgânicos, desde detergentes a fármacos, os quais são de largo uso na atualidade....
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Química verde; Agroindústria; Biomassa; Biomass; Green chemistry.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/967574

Fish feed: integrated process of mushroom and fish feed production from residues of the oil palm agro-industry.
Provedor de dados: 14
Autores: SIQUEIRA, F. G. de.
Integrated production process for edible Pleurotus ostreatus mushrooms and inputs for the formulation of fish feed using residual plant biomass from the oil palm agro-industry. The concept of integration refers to the production of residual biomass of mushrooms for human consumption, using the substrate of its cultivation (SMS) to formulate fish feed.
Tipo: Folders
Palavras-chave: Peixe; Alimentação; Cogumelo; Biomassa; Pleurotus ostreatus; Mushrooms; Oil palm products; Fish feeds; Biomass.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1132974

Ecosystemes benthiques profonds et chimiosynthese bacterienne: Sources hydrothermales et suintements
Provedor de dados: 5
Autores: Laubier, Lucien.
Hydrothermal communities of various species compositions have been described from the eastern and western Pacific and Atlantic. Brine and cold seeps and hydrocarbon seepages have been found off Florida, off the Oregon and Japanese subduction systems, on the Laurentian Fan, near Barbados, and off Louisiana. Biomasses range from 10 to 70 kg/m super(2), fresh weight. Basic microdistribution of species groups in aureoles centered around hydrothermal vents reveals different levels of adaptation to harsh physico-chemical conditions. Two groups of primary producers can be recognized: a highly efficient cool water group with large vestimentiferan tube worms and bivalves, and alvinellid polychaetes adapted to hot waters. Both groups are exploited by specific...
Tipo: Text
Palavras-chave: Bivalvia; Polychaeta; Bacteria; Symbionts; Biosynthesis; Chemosynthesis; Food webs; Biomass; Hydrocarbons; Ecosystems; Hydrothermal springs; Seepages; Brines; Benthic environment; Benthos.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1171.pdf

Biomasse et production primaire du phytoplancton et du microphytobenthos de deux biotopes sableux (Golfe de Fos, France)
Provedor de dados: 5
Autores: Plante-cuny, Marie-reine; Bodoy, Alain.
The primary production (phytoplankton and microphytobenthos) of a coastaL shallow water ecosystem (0.5 m) was investigated in two sandy areas, differing by their wave exposure. The physical and chemical parameters, the functional chlorophyll and pheopigments as well as the primary production were measured monthly, throughout a two-year study. The bivalve Ruditapes decussatus was the dominant species in the sheltered station (RD), whereas Donax trlmcu/us inhabited the other station (DT) which was exposed to the open-sea waves. Microphytic biomasses were determined after extracting chlorophyll a and pheopigments in 90% acetone. by spectrophotometric measurements before and after acidification. Gross hourly primary production was estimated by measuring the...
Tipo: Text
Palavras-chave: Biomasse; Production primaire; Phytoplancton; Microphytobenthos; Mediterranee; Biomass; Primary production; Phytoplancton; Microphytobenthos; Mediterranean.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/publication-2870.pdf

Etat de la prolifération de la crépidule (Crepidula fornicata) en baie de Saint-Brieuc.
Provedor de dados: 5
Autores: Hamon, Dominique; Blanchard, Michel.
The aim of this report is to provide an original method of mapping slipper limpet beds in the bay of Saint-Brieuc (Western Channel) by means of side scan sonar and submarine video.  An evaluation of the biomass completes the distribution of limpets. The total fresh weight is about 250 000 tons
Tipo: Text
Palavras-chave: Baie de Saint-Brieuc; Crepidula fornicala; Sonar latéral; Vidéo sous-marine; Cartographie; Biomasse; Bay of Saint-Brieuc. Crepidula fornicata; Side scan sonar; Submarine video; Cartographv; Biomass.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00107/21790/19365.pdf

Caracteristiques saisonnieres de l'hydrobiologie du complexe estuariende Marennes-Oleron (France).
Provedor de dados: 5
Autores: Heral, Maurice; Razet, Daniel; Deslous-paoli, Jean-marc; Berthome, Jean-paul; Garnier, J.
Four seasonal compaigns providing a sampling of 15 stations each followed during half a tide cycle, i.e. 120 water samples permit the definition of the main hydrobiological features of Marennes-Oleron Bay: salinity and turbidity, phytoplanktonic biomasses, ATP concentrations. The authors suggest that a new way of adapted sampling to their objectives, will work out in the future by sampling during tidal cycles but as frequently as possible.
Tipo: Text
Palavras-chave: Seasonal variations; Salinity; ATP; Estuaries; Turbidity; Hydrobiology; Salinity; Phytoplankton; Estuaries; Biomass; Hydrobiology; Physicochemical properties; Phytoplankton; Environmental conditions; Biomass.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1854.pdf

Seasonal budgets of organic matter in the Ubatuba shelf system, SE Brazil. I. Planktonic and benthic components
Provedor de dados: 5
Autores: Rocha, Gra; Rossi-wongtschowski, Cldb; Pires-vanin, Ams; Jarre-teichmann, A.
Planktonic and benthic productivity and consumption were estimated to assess the availability of food to higher trophic-level consumers in the Ubatuba ecosystem on the SE coast of Brazil. The study area included waters from 10 to 100 m deep and covered 3800 km(2). The trophic compartments of the system were established on ecologically or taxonomically related species, considering their relative abundance and similarity of diets and habits. The compartments are phytoplankton, zooplankton, salps, bacterioplankton, cnidaria, polyplacophora, mollusca, carnivorous benthos, detritivorous polychaetes, other detritivorous benthos, penaeidea-caridea, brachyura, and echinodermata. Biomass, production, and consumption were estimated in summer and winter. Plankton...
Tipo: Text
Palavras-chave: Biomasse; Production; Consommation; Subtropical; Atlantique Ouest; Biomass; Production; Consumption; Subtropical; Western Atlantic.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43241/42970.pdf

Nutriments et biomasse microalgale de l'interface eau-glace au large de Kuujjuarapik, Baie d'Hudson, Arctique Canadien
Provedor de dados: 5
Autores: Maestrini, S; Rochet, M; Legendre, L; Demers, S.
Nutrient analyses were done in melted ice, frazil and sea water of the upper part of the water column, where as major constitutive elements of micro-algae were analysed. Measurements of nutrient uptake were carried out with frazil algae incubated at -1.5 degree C in a field incubator. Differential-enrichment bioassays and mean N/P ratio (5.9) demonstrated that actual growth of the cultures was nutrient-limited. Nitrogen governed the algal yield when illumination and grazing allowed the microalgae to grow. It concluded that the epontic dynamics is not only controlled from above, by the seasonal (climatic) changes in light intensity as generally assumed, but also from below, by the short-term (hydrodynamic) events of vertical mixing that replenish the...
Tipo: Text
Palavras-chave: Nutritive value; Growth; Food absorption; Algae; Ice water interface; Biomass; Nutrients (mineral).
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1533.pdf

Numération et approche qualitative des populations bactériennes des lagunes aménagées de Certes (Arcachon). I. Bactéries hétérotrophés aérobies
Provedor de dados: 5
Autores: Baleux, B.; Caumette, P.; Trousselier, M.
Numeration, biomass, distribution within time, some physiological characters and a taxonomical outline, with a standardized micro method, of aerobic hétérotrophie bacteria isolated from sediments an waters, from fishponds of "Domaine de Certes" (Arcachon) from june 1977 to may 1978 are described. Number of hétérotrophie bacteria evolved in a significant way, according to seasons, and bacterial biomass is higher in the sediments than in the waters. Metabolic or physiological differences (proteolysis, denitrification) appeared among populations due to the origin of sediments. Moreover the qualitative study pointed out taxonomical units as Bacillus associated to seasons, or Agrobacterium associated to vegetable detritical sediments.
Tipo: Text
Palavras-chave: Lagunes; Bactéries hétérotrophes aerobies; Biomasse; Taxonomie; Micro méthode; Enzymatiques; Lagoons; Aerobic heterotrophic bacteria; Biomass; Taxonomy; Enzymatic micro methods.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00306/41677/40886.pdf

Productivity in tropical upwelling areas considered by a new method of analysis and determination.
Provedor de dados: 5
Autores: Minas, H; Minas, M; Packard, T.
When in frontal zones of upwelling areas, a two-component mixing of nutrient rich upwelled water and oligotrophic offshore waters occurs, the amounts of nutrient consumed (- Delta N) and oxygen produced (+ Delta O2) can be evaluated by a detailed analysis of diagrams, in which salinity is the conservative parameter. By this same method, the corresponding T-S diagram allows a determination of the net heat gain of the upwelling water body during its offshore transport, and consequently the corresponding residence time in the photic zone. By integrating the nutrient consumption over the whole upwelling area, it is possible to obtain a more realistic average value of the productivity than with direct measurements of photosynthetic activity (14C and other...
Tipo: Text
Palavras-chave: Primary production; Dynamical oceanography; T/S diagrams; Fertility; Biomass; Upwelling; Pelagic environment; Analytical techniques; Biological production.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1527.pdf

Estimation du stock d'huîtres creuses Crassostrea gigas, en élevage en Baie de Cancale, en octobre 2002
Provedor de dados: 5
Autores: Mazurie, Joseph; Bouget, Jean-francois.
in order to estimate the carrying capacity of Mont Saint-Michel Bay, the stock (or biomass) of cupped oysters, Crassostrea gigas, cultivated intertidally, in Cancale Bay, has been estimated in october 2002. Aerial photographs, at 2 scales (1/10 000 and 1/2000), provided by the mollusc farmers union, have been used to estimate the cumulative length of surelevaged trestles (« tables ») and the occupation rate by oyster bags. A field survey, between the 7th and 9th of october 2002, has been conducted by Ifremer with the help of « Lycée Maritime de Saint-Malo », on 40 sampled stations : 3 subsample bags per station were examined (counts and weights of different age-class oysters). 309 ha out of 333 leased ha were considered exploited (after elimination of...
Tipo: Text
Palavras-chave: Baie du Mont Saint Michel; Cancale; Crassostrea gigas; Cupped oysters; Production; Biomass; Baie du Mont Saint Michel; Cancale; Crassostrea gigas; Huîtres creuses; Production; Biomasse; Stock.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/rapport-5296.pdf

Greater Mitochondrial Energy Production Provides Resistance to Ocean Acidification in “Winning” Hermatypic Corals
Provedor de dados: 5
Autores: Agostini, Sylvain; Houlbrèque, Fanny; Biscéré, Tom; Harvey, Ben P.; Heitzman, Joshua M.; Takimoto, Risa; Yamazaki, Wataru; Milazzo, Marco; Rodolfo-metalpa, Riccardo.
Coral communities around the world are projected to be negatively affected by ocean acidification. Not all coral species will respond in the same manner to rising CO2 levels. Evidence from naturally acidified areas such as CO2 seeps have shown that although a few species are resistant to elevated CO2, most lack sufficient resistance resulting in their decline. This has led to the simple grouping of coral species into “winners” and “losers,” but the physiological traits supporting this ecological assessment are yet to be fully understood. Here using CO2 seeps, in two biogeographically distinct regions, we investigated whether physiological traits related to energy production [mitochondrial electron transport systems (ETSAs) activities] and biomass (protein...
Tipo: Text
Palavras-chave: Ocean acidification; Hermatypic corals; Mitochondrial electron transport activity; Biomass; Resistance.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78925/81293.pdf

Stock assesments of the non-cultivated molluscs in the oyster culture area of Marennes Oleron
Provedor de dados: 5
Autores: Sauriau, Pierre-guy.
A quantitative sampling was made on the non-cultivated molluscs of the soft bottom macrofauna in the bay of Marennes-Oleron. A stratified random sampling, including an optimal allocation strategy. provided adequate data to estimate abundance and biomass (total weight. dry weight and ash-free-dry weight) of each molluscan species. The main stratification factors were respectively the bathymetric levels. the different types of sediment and the differences between natural, oyster-free mud flats and cultivated areas. A Smith Mc-Intyre grab was used to sample the subtidal, shallow areas and the tidal flats as well. The total number of sampling stations was 370. The final estimation of the total weight of benthic molluscs was 14,400  ± 3,000 tons (at 95 %...
Tipo: Text
Palavras-chave: Marennes Oleron; Non cultivated benthic molluscs; Biomass; Stock assessments; Stratrification; Sampling; Marennes Oléron; Molluques benthiques non cultivés; Biomasse; Stocks; Stratification; Echantillonnage.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/publication-2867.pdf

Estimates of carbon flow through bacteriplankton in the S. Benguela upwelling region based on 3H-thymidine incorporation and predator-free incubations.
Provedor de dados: 5
Autores: Lucas, M; Painting, S; Muir, D.
Spatial and temporal estimates of bacterial numbers, biomass, activity and production were measured in the S. Benguela upwelling system during the course of a phytoplankton bloom. Bacterial numbers and biomass were highest in the euphotic zone and correlated closely with particulate carbon in the water column rather than with chlorophyll a concentrations. 3H-Thymidine incorporation gave good estimates of production. Differential utilisation of photosynthetic exudates and detrital POC by bacterioplankton during the course of a bloom might account for the varying significance ascribed to exudates and POC as a source of carbon for bacterial production.
Tipo: Text
Palavras-chave: Ecological associations; Algal blooms; Biomass; Microorganisms; Carbon cycle; Bacteria; Nannoplankton; Upwelling; Biogeochemistry.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-985.pdf

Phytoplankton production in the Tagus estuary (Portugal)
Provedor de dados: 5
Autores: Cabecadas, L.
Biomass and phytoplankton photosynthetic response were studied in the lower Tagus estuary weekly, and related to environmental conditions in February, March and April 1994. The Photosynthesis-Irradiance ((P-I)-I-B) relation was studied based on the light-saturated photosynthesis rate (P(B)m) and the light-limited initial slope (a(B)). The nutrient concentrations observed were high enough to be considered as not limiting phytoplankton growth. Tagus estuary phytoplankton seems, to a certain extent, adapted to high turbid conditions, being able to utilize the low light levels more efficiently, which was translated by high values of a(B) [0.10-0.20 mg C (mg Chl a)(-1) h(-1) (W m(-2))(-1)]; however, light seems to limit phytoplankton production in the water...
Tipo: Text
Palavras-chave: Production primaire; Phytoplancton; Estuaire; Biomasse; Turbidité; Primary production; Phytoplankton; Estuary; Biomass; Turbidity.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43621/43310.pdf

Influence des facteurs climatiques sur la production conchylicole du bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Heral, Maurice; Prou, Jean; Deslous-paoli, Jean-marc.
The authors are comparing the recruitment, the commercialised production, the cultivated biomasses of oysters Crassostrea gigas and Crassostrea angulata  with the statistics of the meteorology (1885-1984). The temperature plays a role up on the date of spawning but partialy explains the lack of recruitment, which has less impact on the commercialised production than on the total biomass. The annual and seasonal characteristics of the precipitations and water temperatures do not show tight correlations with the variations of the production and of the biomass, for these cultivated populations in opposition with the sensitivity of the natural molluscan populations towards the climatic factors.
Tipo: Text
Palavras-chave: Meteorology; Recruitment; Biomass; Production; Crassostrea angulata; Crassostrea gigas; Météorlogie; Recrutement; Biomasse; Production; Crassostrea gigas; Crassostrea angulata.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2968.pdf

Community structure and temperature dynamics within a mussel assemblage on the Southern East Pacific Rise
Provedor de dados: 5
Autores: Sarrazin, Jozee; Walter, Cecile; Sarradin, Pierre-marie; Brind'Amour, Anik; Desbruyeres, Daniel; Briand, Patrick; Fabri, Marie-claire; Van Gaever, S; Vanreusel, A; Bachraty, Charleyne; Thiebaut, E.
The composition, biomass and diversity of the fauna in a Bathymodiolus thermophilus mussel assemblage colonizing diffuse flow areas on the SEPR is described and compared with biological characteristics of other hydrothermal assemblages. The spatio-temporal dynamics of temperatures over fine scales within the mussel habitat are characterized using newly-developed statistical approaches. Temperature data obtained from two adjacent habitats (a cirriped assemblage and a bare substratum) are compared. The results of the temperature data show that the mean temperature and the temperature variations were significantly higher in the mussel assemblage (mean temperature: 4.12 +/- 1.85 degrees C) in comparison with 2.40 +/- 0.14 degrees C in the cirriped assemblage...
Tipo: Text
Palavras-chave: East Pacific Rise; Temperature dynamics; Biomass; Diversity; Bathymodiolus thermophilus; Mussel assemblage; Hydrothermal vents.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3570.pdf

Campagne d'évaluation du stock de palourdes du bassin d'Arcachon - Année 2006
Provedor de dados: 5
Autores: Caill-milly, Nathalie; Duclercq, Benoit; Morandeau, Gilles.
Between 1980 and 1986, some Arcachon oyster farmers took up breeding the Japanese clam on the foreshore (Robert et Deltreil, 1990). This production was short lived. The steep fall in prices due to economic competition from Spain, Portugal, Italy and Tunisia, predator action such as the trigger fish (Popovsky et al., 1999), added to the significant amount of mortality that occurred in the summer and autumn of 1992 that affected two-thirds of the total stock, led to clam farming being abandoned at the end of the 1980s.  In the Arcachon basin, the Japanese clam (Ruditapes philippinarum) population, now natural to the area, has found favourable conditions for development and is expanding rapidly there. This species has been supplanting the local species...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Veneridae; Popluation structure; Biomass; Stock assessment; Arcachon Bassin; Veneridae; Ruditapes Philippinarum; Bivalvia; Mollusca; Structure Population; Biomasse; Abondance; Evaluation Stock.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/2006/rapport-2218.pdf

Seasonal development of bacterial communities in a coastal marine sediment as related to the input of organic material.
Provedor de dados: 5
Autores: Meyerreil, L; Graf, G.
The seasonal development of benthic communities was followed in a coastal marine sediment of the Kiel Bight (Baltic Sea; FRG). Total benthic biomass, (ATP), bacterial biomass, overall benthic activity (heat production), and enzymatic decomposition rates of carbohydrate (d-amylase activity) followed a seasonal cycle strongly related to certain events in the sediment. Among these, the input of the phytoplankton blooms in autumn and spring, the accumulation of organic material during winter, and changes in the physical characteristics of the sediment turned out to be most important for the development of benthic biomass and activity. Processes within the benthic community occurred in very short time scales (within days).
Tipo: Text
Palavras-chave: Bacteria; Organic matter; Sediments; Bioenergetics; Enzymatic activity; Biomass.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-944.pdf

Evolution de la biomasse de mollusques en elevage dans l'etang de Thau de 1980 a 1984.
Provedor de dados: 5
Autores: Hamon, Pierre-yves; Tournier, Henri.
Since 1980, the IFREMER research laboratory "Resources Aquacoles", Sete (France), follows during the summer period, the evolution of the commercial stocks of molluscs (mussels and oysters) reared in Thau Lagoon. The data for this estimation are collected, on one hand, by surface observations and, on the other hand, by diving observations. During the years 1980 to 1984, the authors noticed an increase of oyster biomass, during the same period the mussel biomass decreased. The different simulations used to know the total filtration and the biodeposit, have shown that the impact of the increase of the total biomass is not so important as it could be feared.
Tipo: Text
Palavras-chave: Bivalvia; Marine mollusks; Stock assessment; Population density; Biomass.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1787.pdf

Estimation des stocks de moules dans le Pertuis Breton en 1987
Provedor de dados: 5
Autores: Mazurie, Joseph; Dardignac-corbeil, Marie-jose.
Une estimation de la biomasse de moules présente sur les bouchots du Pertuis Breton situés au sud de la Sèvre niortalse a été réalisée en 1987 . Le but était de mettre au point une stratégie d'échantillonnage adaptée à ce mode de culture . La méthode utilisée est décrite et une optimisation de l'effort d'échantillonnage réalisée ; elle détermine pour différentes précisions l'effort à consentir. La biomasse étudiée a été estimée à 4 722 tonnes avec une précision de 14 %.
Tipo: Text
Palavras-chave: Moules; Bouchots; Biomasse; Echantillonnage; Pertuis Breton; Mussels; Biomass; Sampling; Pertuis Breton.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00045/15589/12991.pdf

Estimation du stock de moules sur bouchots en baie du Mont Saint-Michel
Provedor de dados: 5
Autores: Gerard, Denis.
The quantity of mussels cultivated on wooden poles called « bouchots », in Mont Saint-Michel bay, has been estimated in april 2002, by volume, number and weight. To do so, a sampling strategy has been conceived, operated and then optimized, taking into account the spatial distribution of this stock and the material and human constraints (especially the amount of persons and working days available). The sampling plan uses procedures of stratification, degrees, regression, so as to reach the optimum precision related to cost. The operation took a great advantage of the efficient help of mussel farmers. During the first day, the task consisted to estimate the number and position of poles occupied by mussels, with the help of 5 persons on boat. The following 2...
Tipo: Text
Palavras-chave: Mont Saint Michel; Sampling; Biomass; Stock; Mussels; Mont Saint Michel; Échantillonnage; Biomasse; Bouchot; Stock; Moules.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-5304.pdf

Variabilité spatio-temporelle de la biomasse microphytobenthique en rade de Brest et en Manche occidentale
Provedor de dados: 5
Autores: Sagan, G; Thouzeau, G.
Microphytobenthic biomass was estimated in the Bay of Brest (1994) and the western English Channel (Trezen Vraz, 1993) using spectrophotometry. Best results (42 % difference) were obtained with an instantaneous extraction procedure at room temperature, compared with the cold extraction procedure. Chlorophyll biomass in sediment was higher in the western English Channel (65-215 mg Chl a m(-2)) than in the Bay of Brest (10-113 mg Chl a m(-2)), in contrast to total pigment biomass (Chl a + pheo a : 88-254 mg m(-2) at Trezen Vraz vs. 131-934 mg m(-2) in the Bay of Brest). This study emphasized decreasing pigment biomass from the estuary to the open sea. Low benthic pigment biomass in the Bay, compared to eutrophic ecosystems, agrees with previous studies on...
Tipo: Text
Palavras-chave: Microphytobenthos; Biomasse; Écosystèmes côtiers; Forçage physique; Microphytobenthos; Biomass; Coastal ecosystems; Physical forcing.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43651/43242.pdf

Variation in structure and biomass of the benthic communities at three contrasting sites in the tropical Northeast Atlantic
Provedor de dados: 5
Autores: Galeron, Joelle; Sibuet, Myriam; Mahaut, Ml; Dinet, A.
Three major size classes of the benthic metazoan communities (megafauna, macrofauna and meiofauna) were investigated simultaneously at 3 sites in the tropical Northeast Atlantic. The sites varied in their level of surface primary productivity (eutrophic, mesotrophic and oligotrophic). Results for 3 cruises in 3 seasons (Eumeli 2, winter 1991; Eumeli 3, autumn 1991; Eumeli 4, spring 1992) are given for each size class in terms of taxonomic composition, density and biomass. The benthic communities did not exhibit evidence of seasonal variation, but there were substantial differences in the quantitative structure of the metazoan communities between the 3 sites. Total metazoan density and biomass, as well as density and biomass of each size class, decreased...
Tipo: Text
Palavras-chave: Deep sea; Tropical Atlantic; Meiofauna; Macrofauna; Megafauna; Taxonomic composition; Density; Biomass; Environmental conditions.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00000/10519/7602.pdf

Role des bacteries phototrophes anoxygeniques dans une partie stratifiee d'une lagune tropicale (Lagune Ebrie, Cote d'Ivoire)
Provedor de dados: 5
Autores: Caumette, P.
In the deepest parts of the estuarine region of Ebrie Lagoon (Abidjan Africa, (5 degree N, 4 degree W) stratified conditions have been observed during the rainy season (May to Nov.), owing to salinity differences between oxic and anoxic layers. At the interface, 3-4 m depth, phototrophic bacteria (Chromatium, Chlorobium and Pelodictyon ) developed, forming a brown layer due to their different pigments. Their production has been estimated at 41% of the total photosynthetic production during high stratification (Sep. 1981) and their biomass was used by the copepod population for 40 to 60% of its diet. During the dry season, the water column became homogeneous and oxygen was detected to 6m depth. The brown layer of phototrophic bacteria disappeared, as well...
Tipo: Text
Palavras-chave: Chlorobium; Chromatium; Primary production; Photosynthesis; Estuaries; Seasonal variations; Plankton; Stratification; Vertical distribution; Bacteria; Coastal lagoons; Trophic relationships; Biomass.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-957.pdf

Zooplankton production in the Mediterranean Sea
Provedor de dados: 5
Autores: Greze, V.
An attempt is made to calculate the specific production of major zooplankton groups using a physiological method proposed by Winberg. The present report is based on material obtained from 50 stations in the Aegean and Adriatic Seas; Tunisian Strait and Algerian-Provencal basin. The algorithm of Zharov, used by the author, includes the data biomass, abundance, relation between metabolism at given temperature and organism, dependence of production upon metabolism, and the food utilization coefficient for growth.
Tipo: Text
Palavras-chave: MED; Body weight; Biomass; Growth; Food conversion; Temperature effects; Animal metabolism; Secondary production; Zooplankton.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1513.pdf

Does the size of the microphytobenthic biofilm on intertidal muflats depend on the available photosynthetic biomass?
Provedor de dados: 5
Autores: Herlory, Olivier; Blanchard, G; Planche, S; Huet, V; Richard, Pierre.
Many scientists consider that the top centimetre of the sediment on intertidal mudflats contains the photosynthetic competent biomass (PCB). Part of this biomass migrates upward to the surface of the sediment during diurnal emersion periods to form a temporary biofilm: the photosynthetic active biomass (PAB). The present study tests the hypothesis that the size of the biofilm (PAB) is functionally dependent on PCB. Therefore, we have plotted PAB as a function of PCB for a range of different environmental conditions: 3 seasons and 5 tidal situations, representing a total of 600 cores. This investigation points out that, in spring and autumn, there was a simple linear relationship between PAB and PCB, thus indicating that the maximum size of the biofilm...
Tipo: Text
Palavras-chave: Functional relationship; Biofilm; Biomass; Intertidal mudflat; Microphytobenthos.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-3622.pdf

Estimation des biomasses de moules (Mytilus edulis L.) en élevage dans les bouchots du Pertuis Breton - Evolution entre 1988 et 1993
Provedor de dados: 5
Autores: Dardignac-corbeil, Marie-jose.
The biomass of the cultivated mussels has been estimated every year in the Pertuis Breton dulring the period 1988-1993. The method used is first recalled, then the question of the biomass trends during spring -i.e. during the sampling period- is discussed. Based on the results, it appears that the mussel volume starts decreasing in 1990 to reach a minimum in 1991. A slight increase is observed in 1992 but no further improvement in 1993. The factors possibly related to this evolution are finally discussed.
Tipo: Text
Palavras-chave: Pertuis Breton; Mytilus edulis; Bouchots; Biomasse; Pertuis Breton; Mytilus edulis; Bouchots; Biomass.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00045/15586/12988.pdf

Distribution quantitative de la macrofaune benthique du peuplement des cailloutis dans le détroit du Pas de Calais (Manche orientale, France)
Provedor de dados: 5
Autores: Migne, A; Davoult, D.
Because of strong tidal currents, the bottom of the Dover Strait consists of coarse sediment which is colonized by a pebble community. A quantitative study, based on 0.1 m(2) quadrat samples taken by divers, was conducted on this community to establish the richness of benthic macrofauna (in terms of biomass and diversity) and to provide conclusive data on global community structure (spatial and temporal heterogeneity, trophic structure). Eight samples were taken between June 1992 and June 1993, eight replicates being taken on each sampling visit. One hundred and one species were identified, in 10 zoological groups, and a mean biomass of 281 g.m(-2) (ash free dry weight) was calculated. The Shannon diversity index was low (H' = 1.24) because of the strong...
Tipo: Text
Palavras-chave: Macrobenthos; Biomass; Trophic structure; Diversity; Spatial heterogeneity.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20409/18076.pdf

Community, Trophic Structure and Functioning in two contrasting Laminaria hyperborea forests
Provedor de dados: 5
Autores: Leclerc, Jean-charles; Riera, Pascal; Laurans, Martial; Leroux, Cedric; Leveque, Laurent; Davoult, Dominique.
Worldwide kelp forests have been the focus of several studies concerning ecosystems dysfunction in the past decades. Multifactorial kelp threats have been described and include deforestation due to human impact, cascading effects and climate change. Here, we compared community and trophic structure in two contrasting kelp forests off the coasts of Brittany. One has been harvested five years before sampling and shelters abundant omnivorous predators, almost absent from the other, which has been treated as preserved from kelp harvest. δ15N analyses conducted on the overall communities were linked to the tropho-functional structure of different strata featuring these forests (stipe and holdfast of canopy kelp and rock). Our results yielded site-to-site...
Tipo: Text
Palavras-chave: Laminaria hyperborea; Community cascade; Stable isotopes; Biomass; Suspension-feeders; Omnivorous predators.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00226/33747/32161.pdf

Variations à différentes échelles spatiales de l'herbier à Posidonia oceanica (L.) Delile ; effets sur les paramètres physico-chimiques du sédiment
Provedor de dados: 5
Autores: Gobert, S; Kyramarios, M; Lepoint, G; Pergent-martini, C; Bouquegneau, Jm.
The biometric parameters (shoot density, length and width of leaves, leaf and epiphyte biomasses, leaf surface) of the P. oceanica meadow present a significant spatial variability at the mesoscale level (100m(2)). All the parameters studied, excepting the number of leaves, decrease according to the depth. The horizontal spatial variations (centrifuge and centripetal distributions) reach a maximum in the shallower areas. The analysis of the microstructures (m(2)) of the meadow has not allowed a relationship to be established between the spatial variations of the biometric parameters and the environmental factors in the sediment (pH, water and organic matter content, red-ox potential, nutrient content). The heterogeneity of the meadow in the Revellata Bay...
Tipo: Text
Palavras-chave: Posidonia oceanica; Distribution spatiale; Biomasse; Sédiment; Phanérogame; Méditerranée; Posidonia oceanica; Spatial distribution; Biomass; Sediment; Seagrass; Mediterranean Sea.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00322/43277/43009.pdf

Approche de la capacité trophique d'un écosystème conchylicole
Provedor de dados: 5
Autores: Heral, Maurice; Deslous-paoli, Jean-marc; Prou, Jean.
After a short bibliographical study of the different approaches for determination of the trophic capacity of a bay for molluscs culture, the authors, with a global mode, show the relations between the growth performance of the oysters Crassostrea gigas in relation with the cultivated stocks. The volumes of consumed and assimilated food are calculated for the stocks in relation with the incoming volumes of water in the bay and the residence time for neap tide and spring tide. The authors find a decrease of growth rate in relation with the volume of consumed food. When it is above 60% and when the volume of assimilated food is above 20%, there is a large decrease of the growth of oysters.
Tipo: Text
Palavras-chave: Crassostrea gigas; Oysters; Stock assessment; Models; Food consumption; Growth; Biomass; Stock cultivé; Biomasse; Croissance; Modèle; Crassostrea gigas; Huîtres; Capacité trophique.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/acte-3834.PDF

Dominance of individual plant species is more important than diversity in explaining plant biomass in the forest understorey
Provedor de dados: 5
Autores: Wasof, Safaa; Lenoir, Jonathan; Hattab, Tarek; Jamoneau, Aurelien; Gallet-moron, Emilie; Ampoorter, Evy; Saguez, Robert; Bennsadek, Lamine; Bertrand, Romain; Valdes, Alicia; Verheyen, Kris; Decocq, Guillaume.
Questions How does plant community diversity influence variation in plant biomass? There are two competing hypotheses: the ‘biomass‐ratio hypothesis’, where biomass is influenced by the abundance and traits of the most dominant species, and the ‘diversity hypothesis’, where the diversity of organisms influences biomass through mechanisms such as niche complementarity. However, no studies have tested which one of these two hypotheses better explains the variation in plant biomass in the forest understorey. Location Temperate deciduous forests in Northern France. Methods For the forest understorey, we assessed species diversity and biomass as well as soil and light conditions in 133 forest plots of 100m² each. Using mixed‐effect models and after controlling...
Tipo: Text
Palavras-chave: Biodiversity; Biomass; Biomass ratio hypothesis; Forest understorey; Functional diversity; Ivy; Phylogeny; Production.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00433/54441/55799.pdf

Spring microzooplankton composition, biomass and potential grazing in the central Cantabrian coast (southern Bay of Biscay)
Provedor de dados: 5
Autores: Quevedo, M; Anadon, R.
Microzooplankton abundance, biomass and composition were investigated in the coastal waters of Asturias (southern Bay of Biscay) in May 1996. Abundance ranged from 0.7 x 10(3) to 8.5 x 10(3) cell.L-1 The protists community was dominated by aloricate ciliates averaging 82 % of microheterotrophs. Small aloricate ciliates, below 20 mu m in size, contributed 63 % to total ciliate abundance. Carbon biomass ranged from 2.4 to 15.4 mgC.m(-3), averaging 23 % of phytoplankton biomass. Aloricate ciliates were also the dominant component of biomass (56.2 %), but the importance of copepod nauplii increased in terms of carbon, averaging 28.5 % of total biomass. Microzooplankton biomass was significantly correlated with Chi a concentration in the water column....
Tipo: Text
Palavras-chave: Microzooplancton; Ciliés; Biomasse; Broutage; Golfe de Gascogne; Microzooplankton; Ciliates; Biomass; Grazing; Southern Bay of Biscay.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00324/43564/44061.pdf

Influence de la densite et de l'age des huitres japonaises (Crassostrea gigas ) sur la croissance et la composition biochimique en bassins de terre
Provedor de dados: 5
Autores: Bodoy, A; Geiaron, P; Garnier, Jacqueline; Heurtebise, S.
Two different biomasses (100 g multiplied by m super(-2) and 1 kg multiplied by m super(-2)) of oysters were put in identical sea-water ponds, thus leading to different trophic conditions, corresponding to rearing techniques. Changes in growth, biochemical composition and sexual maturation were recorded for two age groups. The first one included 9 month-old oysters and the second one 21 month-old oysters, at the beginning of the experiment. For both age groups, significant differences were observed in growth and biochemical composition. Lipids were accumulated faster for the lower biomass. However, the only difference concerning glycogen was observed on the older oysters. They showed a peak at the lowest biomass and a decrease at the larger biomass. Sexual...
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalvia; Sea water; Oyster culture; Glycogen; Age; Chemical composition; Lipids; Biochemistry; Sexual maturity; Rearing; Pond culture; Biomass; Growth; Density.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-916.pdf

Biological characteristics of a hydrothermal edifice mosaic community
Provedor de dados: 5
Autores: Sarrazin, Jozee; Juniper, Sk.
This study defines the composition and biomass characteristics of 5 of 6 previously described faunal assemblages that form a mosaic community on hydrothermal sulfide edifices of the Juan de Fuca Ridge (northeast Pacific). Quantitative samples of each assemblage were acquired during 'ROPOS' Remote Operated Vehicle (ROV) dive programs in 1994 and 1996. Total abundance, and species richness, as well as wet and dry weights, were calculated for each assemblage, and sampled surface area was measured directly or from scaled images of sample scars. These data were used to compare species composition, richness and biomass of the distinct assemblages and to estimate total biomass of a sulfide edifice. In addition to major compositional differences, we observed an...
Tipo: Text
Palavras-chave: Vent ecology; Biomass; Faunal succession; Sulfide edifice; Assemblage characteristics; Image analysis; Juan de Fuca Ridge; Ecological model; Marine ecosystem biomass.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00280/39114/37667.pdf

Current Status of the Algae Production Industry in Europe: An Emerging Sector of the Blue Bioeconomy
Provedor de dados: 5
Autores: Araújo, Rita; Vázquez Calderón, Fatima; Sánchez López, Javier; Azevedo, Isabel Costa; Bruhn, Annette; Fluch, Silvia; Garcia Tasende, Manuel; Ghaderiardakani, Fatemeh; Ilmjärv, Tanel; Laurans, Martial; Mac Monagail, Micheal; Mangini, Silvio; Peteiro, César; Rebours, Céline; Stefansson, Tryggvi; Ullmann, Jörg.
The EU Bioeconomy Strategy aims to support the sustainable growth and development of the EU bio-based sectors while creating jobs, innovation and services. Despite the recognized potential of the algae biomass value chain, significant knowledge gaps still exist regarding the dimension, capability, organization and structure of the algae production in Europe. This study presents and analyses the results of a comprehensive mapping and detailed characterization of the algae production at the European scale, encompassing macroalgae, microalgae, and the cyanobacteria Spirulina. This work mapped 447 algae and Spirulina production units spread between 23 countries, which represents an important addition to the reported number of algae producing countries. More...
Tipo: Text
Palavras-chave: Blue growth; Seaweed; Bioeconomy; Biomass; Production; Algae.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78923/81291.pdf

Les stocks de moules dans le Pertuis Breton en 1989 - Convention Poitou-Charente 1989-1993
Provedor de dados: 5
Autores: Dardignac-corbeil, Marie-jose.
La biomasse de moules en élevage dans le Pertuis Breton au printemps 1990 a été estimée à 15.500 tonnes avec une précision de 4,7 %. Les observations faites cette année ont montré que la biomasse évolue très rapidement à cette saison du fait de la croissance des moules . Il semblerait qu'il soit préférable d'évaluer le stock en février , époque où il est relativement stable .
Tipo: Text
Palavras-chave: Moules; Bouchots; Biomasse; Echantillonnage; Pertuis Breton; Mussels; Biomass; Sampling; Pertuis Breton; Bouchots.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00045/15587/12989.pdf

Estimation des stocks de moules dans le Pertuis Breton en 1988
Provedor de dados: 5
Autores: Dardignac-corbeil, Marie-jose; Mazurie, Joseph.
Following a study achieved in 1987, a 3 stage sampling plan was adopted to estimate the biomass of mussels cultivated on the stakes of the "Pertuis Breton". The estimation carried out in 1988 was extended to the whole Pertuis Breton and the biomass was assesssed to 14000 tons with a precision of 5,5 %.
Tipo: Text
Palavras-chave: Moules; Bouchots; Biomasse; Sampling; Pertuis Breton; Mussels; Biomass; Sampling.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00045/15588/12990.pdf

Evolution de la biomasse et de la physiologie du zooplancton sur la côte nord de Bretagne en relation avec l'échouage de l'Amoco Cadiz : résultats préliminaires pour la période du 16 mars au 20 mai 1978
Provedor de dados: 5
Autores: Samain, Jean-francois; Le Fevre, J.; Moal, J.; Daniel, J.y.; Boucher, Jean.
First results about distribution and changes of biomass (dry weight and total soluble proteins), physiology (amylase, trypsin) and faunistic composition of zooplankton are reported for the two months period following the spill of AMOCO CADIZ on the Britany Northern coast. A shortage of biomass in the aber area is attributed to hydrocarbons. The low level of the mean value of biomasse on the North coasts, and the pecularities of estuarine station of the Lannion bay and of Trieux area are reported and discussed.
Tipo: Text
Palavras-chave: Amoco Cadiz; Zooplancton; Biomasse; Physiologie; Marée noire; Amoco Cadiz; Zooplankton; Biomass; Physiology; Spill.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00306/41728/40939.pdf

Antarctic pack ice algal distribution: Floe-scale spatial variability and predictability from physical parameters
Provedor de dados: 5
Autores: Meiners, K. M.; Arndt, S.; Bestley, S.; Krumpen, T.; Ricker, Robert; Milnes, M.; Newbery, K.; Freier, U.; Jarman, S.; King, R.; Proud, R.; Kawaguchi, S.; Meyer, B.
Antarctic pack ice serves as habitat for microalgae which contribute to Southern Ocean primary production and serve as important food source for pelagic herbivores. Ice algal biomass is highly patchy and remains severely undersampled by classical methods such as spatially restricted ice coring surveys. Here we provide an unprecedented view of ice algal biomass distribution, mapped (as chlorophyll a) in a 100 m by 100 m area of a Weddell Sea pack ice floe, using under-ice irradiance measurements taken with an instrumented remotely operated vehicle. We identified significant correlations (p &lt; 0.001) between algal biomass and concomitant in situ surface measurements of snow depth, ice thickness, and estimated sea ice freeboard levels using a statistical...
Tipo: Text
Palavras-chave: Sea ice properties; Snow; Freeboard; Chlorophyll a; Ice algae; Biomass.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00398/50957/51721.pdf

Eléments nutritifs limitant la biomasse phytoplanctonique d'une lagune tropicale de Côte d'Ivoire. Comparaison des méthodes d'estimation
Provedor de dados: 5
Autores: Dufour, P.; Cremoux, Jl.; Slepoukha, M.
"In vitro" enrichment experiments on natural populations have been used to determine the nutrients controlling the potential biomass of phytoplancton in the Ebrié coastal lagoon. The limiting nutrients were generally nitrogen, phosphorus and carbon, in this order ; in three cases out of eleven, P and N act simultaneously ; in an extreme eutrophication case, N, P and C were all limiting. No effect was observed following addition of metals, vitamins or chelators. The limitations deduced from the enrichment experiments show a. good agreement with the elementary composition of the external medium ; in waters potentially limited by N alone, the dissolved inorganic nutrients have a N : P ratio lower than 25. The agreement is poorer when the sestonic N : P ratio...
Tipo: Text
Palavras-chave: Lagune; Estuaire; Zone tropicale; Phytoplancton; Biomasse; Eléments limitants; Tests biologiques; Composition chimique; Coastal lagoon; Estuary tropical zone; Phytoplankton; Biomass; Limiting nutrients; Bioassay; Chemlcal composition.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00306/41689/40898.pdf

Observations dans les zones peu accessibles de l'environnement bathyal (biologie et geologie) grace a l'usage des soucoupes plongeantes
Provedor de dados: 5
Autores: Roux, M.
On the bathyal slope for continental margins, steep and rocky substrates punctuated with cliffs and collapsing zones are frequently found. As survey and sampling with the classical technics from the sea surface is practically impossible in such an environment, in situ exploration with a submersible allows significant advances in ecology, with implications in paleoenvironment reconstruction. Mixing of material from shallow-water and deep-sea origins into bathyal sedimentation suggests that the so-called "fossil assemblages of outer platform" were frequently misinterpreted. Dense populations of animals closely related to fossil groups which were only considered as relict of the Past ("living fossils") and previously interpreted as shallow-water inhabitants...
Tipo: Text
Palavras-chave: Continental margins; Bathyal zone; Diving; Cruises; Sedimentation; Biomass; Geology; Biology; Imaging techniques; Image processing; Marine technology; Underwater photography; Submersibles.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1138.pdf

Elevage de copepodes harpacticoïdes (Tisbe holothuriae) en cycle complet. Rôle des facteurs température et nutrition
Provedor de dados: 5
Autores: Gaudy, R.; Guerin, J.p.
Following are results obtained in our laboratory during breeding expe­riments with an harpacticoid copepod, Tisbe holothuriae. In small size volumes (200 ml), the potential production appears to be higher when an artificial compound food of animal substances is used instead of a vegetal diet. In medium volume experiments (100 l) the production is related to the surface available for animals in breeding tanks, Breeding in complete cycles can be obtained using various foods, but the quality of diet may markedly affect the characteristics of the vital cycle, such as the length of the fertility period and fecundity. Temperature has a cru­cial effect, chiefly on dynamic preoccesses, that is to say, developmental rate and average generation time. With different...
Tipo: Text
Palavras-chave: Production; Dynamique des populations; Biomasse; Composition chimique élémentaire; Bilan énergétique; Copépodes harparcticoïdes; Production; Population dynamic; Biomass; Chemical elementary composition; Energy balance; Hapacticoïd copepods.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00306/41672/40881.pdf

Analyse des ressources et des caractéristiques individuelles du stock d'oursin Paracentrotus lividus (Lamarck, 1816) du territoire 64
Provedor de dados: 5
Autores: De Casamajor, Marie-noelle; Mahias, Jeremy; Bru, Noelle; Caill-milly, Nathalie.
A spatial sampling was carried out for stock assessment of sea urchin P. lividus throughout the Basque coast. A sampling, over the year, was conducted to study the reproductive cycle. This work took place over 2013 and 2014. Reproduction occurs once in spring, between May and August 2014. Among factors affecting the release of eggs, salinity, temperature and hydrodynamics show a significant inter-annual variability in the Basque coast. Thus, the period set in 2014, may fluctuate between years. For the stock, the results showed that 11.85 (+/-0.32) million individuals of harvestable biomass for 724 tones (+/- 137). Stock is spread over the entire surveyed area density and biomass decrease rapidly with depth, individuals are mainly located between 0 and 5 m....
Tipo: Text
Palavras-chave: Oursin commun; Stock; Biomasse; Reproduction; Côte basque; Conditions environnementales; Sea urchin; Stock; Biomass; Reproduction; Basque coast; Environmental conditions.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00218/32889/31373.pdf

Distribution of picophytoplankton and nanophytoplankton along an anthropogenic eutrophication gradient in French Mediterranean coastal lagoons
Provedor de dados: 5
Autores: Bec, Beatrice; Collos, Yves; Souchu, Philippe; Vaquer, Andre; Lautier, Jacques; Fiandrino, Annie; Benau, Laurent; Orsoni, Valerie; Laugier, Thierry.
We explored the role of natural and anthropogenic environmental perturbations in shaping the community structure and dynamics of pico- and nanophytoplankton in coastal waters. The distribution patterns of phycoerythrin-rich picocyanobacteria (PE-CYAN) and phycocyanin-rich picocyanobacteria (PC-CYAN), autotrophic picoeukaryotes (PEUK) and nanophytoplankton (NANO) were examined over a period of 3 yr in 24 Mediterranean coastal lagoons displaying wide trophic gradients (from 0.2 to 630 mu g chlorophyll a [chl a] l(-1)) and salinity gradients (from fresh to marine waters). In summer, picoplanktonic abundances reached 3 x 10(8) cells l(-1), 5 x 10(9) cells l(-1) and 6 x 10(10) cells l(-1) for PE-CYAN, PC-CYAN and PEUK, respectively. PE-CYAN and PC-CYAN showed...
Tipo: Text
Palavras-chave: Autotrophic picoeukaryotes; Picocyanobacteria; Nanophytoplankton; Abundance; Biomass; Eutrophication; Mediterranean lagoons.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00031/14267/11547.pdf

Microalgal production in oyster ponds: Nutrition and dissolved organic nitrogen
Provedor de dados: 5
Autores: Maestrini, S; Robert, J.
Microalgal population of oyster ponds is dominated by several tychobenthic diatoms which provide a very good food to grow oysters. The mechanisms which allow them to dominate have been put under research. H.P.L.C. analysis demonstrated 17 amino acids amounted 10-17% of total DON, i.e. 0.6-11.5 mu g-at/l nitrogen. Serin and glycin were the most abundant. None of the substances was related to the presence of oyster. Glutamic acid, alanin and ornithin concentrations showed the greatest variations; they are suspected to play the major role as nutrient source. Screening of nutritional capabilities of ten local isolates of micro-algae to use 42 organic substances as sole source of nitrogen, demonstrated urea, glutamic acid and hypoxanthin are assimilated by all...
Tipo: Text
Palavras-chave: Bacillariophyceae; Bivalvia; Biomass; Pond culture; Algal settlements; Oyster culture; Nutritive value; Dissolved organic nitrogen.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1531.pdf

Resolution of biodiversity and assemblage structure in demersal fisheries surveys: the role of tow duration
Provedor de dados: 5
Autores: Moriarty, M.; Sell, A. F.; Trenkel, Verena; Lynam, C. P.; Burns, F.; Clarke, E. D.; Greenstreet, S. P. R.; Mcgonigle, C.
An experiment during a fisheries independent survey in the North Sea was conducted to test whether sampling effort could be reduced without a significant loss in data precision. To examine potential effects of reducing tow duration from the standard 30 min to a proposed 15 min estimates of species encounter rates, species richness, and estimates of abundance, biomass, and body size were analysed. Results show species richness estimates are lower in the short tow category. While biomass and abundance at length and body size are significantly affected by the change in tow duration, estimates of Large Fish Indicator, the Typical length and Mean-max length are not significantly affected by the regime change. The results presented here suggest that a reduction...
Tipo: Text
Palavras-chave: Abundance; Biomass; Body size; Fisheries independent survey; IBTS; International Bottom Trawl Survey; Linear mixed model; North Sea; Species diversity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00439/55028/60477.pdf

Estimation de la biomasse d'huîtres Crassostrea gigas en élevage dans le bassin d'Arcachon. Été 1985.
Provedor de dados: 5
Autores: Maurer, Daniele; Borel, Michel; Dreno, Jean-paul.
L'élaboration d'un modèle de gestion d'un bassin conchylicole nécessite, en particulier, la connaissance de l’évolution des stocks d'huîtres d'une année à l'autre afin d'en apprécier l'influence éventuelle sur le rendement.  Le présent travail décrit la méthodologie utilisée et les résultats obtenus au cours de la première estimation du stock d'huîtres Crassostrea gigas en élevage dans le bassin d'Arcachon en 1985.  Cette estimation nécessite l'utilisation simultanée de photographies aériennes (évaluation de la surface réellement exploitée ) et de sondages-terrain (évaluation de la biomasse par unité de surface). Ces derniers ont également permis de valider les résultats obtenus par photographie.  En 1985, le taux d'exploitation variait, selon la zone...
Tipo: Text
Palavras-chave: Crassostrea gigas; Biomasse; Bassin d'Arcachon; Crassostrea gigas; Biomass; Bay of Arcachon.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00102/21342/18965.pdf

Nutrient flux associated with the emergence of Quesada gigas Olivier (Hemiptera: Cicadidae) in an urban ecosystem
Provedor de dados: 82
Autores: Aoki,C; Lopes,FS; de Oliveira,AMR; Souza,FL de; Marques,MR.
Large-bodied arthropods, such as cicadas, can be able to reallocate significant amounts of nutrients during adult emergence. Evidence suggests that Quesada gigas Olivier emergence constitutes an important nutrient flux from belowground to aboveground. The purpose of this study was to estimate the amount of nitrogen, proteins, and lipids resulting from the emergence of Q. gigas in an urban ecosystem in Central Brazil. Adult specimens captured from September to November 2006 were weighed and submitted to biochemical analysis. Population density was approximately 4,200 individuals per hectare. Mean individual dry mass was 1.03 g and contained 12.6% proteins, 8.4% lipids, and 5% nitrogen. Total biomass input from the species was 4.3 kg ha-1 y-1, with a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annual cicada; Biomass; Energy; Nutrient cycling; Chain feed.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000400004

Diversity in bee (Hymenoptera: apoidea) and social wasp (Hymenoptera: Vespidae, Polistinae) community in "Campos Rupestres", Bahia, Brazil
Provedor de dados: 82
Autores: Silva-Pereira,Viviane da; Santos,Gilberto M.M.
Hymenoptera such as bees and social wasps are regular floral visitors in "campos rupestres" vegetation. A community of bees and social wasps was studied during floral visitation in an area of "campos rupestres", at Chapada Diamantina, BA, Brazil, from September 2001 to April 2002. The community was described in relation to diversity, evenness, and dominance rank, considering the individuals abundance (H' = 2.14/ J' = 0.55) and biomass (H' = 2.34/ J' = 0.60). Thirty nine bee (588 individuals/ 15.742 g) and 11 social wasp species (52 individuals/ 2.156 g) were collected, being the first report of social wasps for the Brazilian "campos rupestres". The main species regarding number of individuals were Trigona spinipes (Fabricius), Apis mellifera L.,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Altitudinal field; Biomass; Chapada Diamantina; Community structure; Flower visitor.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000200003

A simulation of larch forest dynamics associated with fire in northern Mongolia
Provedor de dados: 19
Autores: Taki, S.; Nobori, Y.; Lopez, C.M.L; Takeda, K.; Ishida, S.; Mizota, C.
Palavras-chave: Biomass; Forest dynamics; Larch forest; Tree ring analysis; Yield-Number curve.
Ano: 2013
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3910

Current status and prospects of biomass technologies in Japan Use of bioethanol
Provedor de dados: 19
Autores: Nishizaki, Kunio; 西崎, 邦夫.
2005年8月4日とかちプラザ・レインボーホールで開催､日本ユネスコ国内委員会主催の帯広農村開発教育国際セミナー(OASERD)国際連合ユネスコアジア太平洋地域教育開発計画事業(APEID)シンポジウム「地球にやさしい農業をめざして :　資源リサイクルを利用した持続可能な食糧生産－」講演資料
Palavras-chave: Biomass; Biofuel; Biogas; BDF(Bio Diesel Fuel); Bioethanol.
Ano: 2005
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1895

モンゴル草本植物のフェノロジーとバイオマスの年々変動
Provedor de dados: 19
Autores: 近藤, 昭彦; 開發, 一郎; 平田, 昌弘; ドルゴスレン, アザヤ; KONDOH, Akihiko; KAIHOTSU, Ichirow; HIRATA, Masahiro; DORGORSUREN, Azzaya.
http://www.jaals.net/学会誌バックナンバー-投稿規定/
Palavras-chave: Mongolia; Grassland vegetation; Phenology; Biomass.
Ano: 2005
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3269

Types of forest fire and biomass decreasing patterns in northern Mongolian forests
Provedor de dados: 19
Autores: Nobori, Y.; Lopez, C.M.L; Takeda, K.; Ishida, S.; Mizota, C.
Palavras-chave: Northern Mongolia; Larix sibirica; Forest Fire; Biomass; Regeneration.
Ano: 2013
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3909

Nitrogen recycling for sustainable agriculture
Provedor de dados: 19
Autores: Takahashi, Junichi; 高橋, 潤一.
2004年8月5日とかちプラザで開催､日本ユネスコ国内委員会主催の帯広農村開発教育国際セミナー(OASERD)国際連合ユネスコアジア太平洋地域教育開発計画事業(APEID)シンポジウム「地球にやさしい農業をめざして : 家畜ふん尿，資源としての有効利用」講演資料
Palavras-chave: Synthetic ammonia; Harber-Bosch; Nitrogen recycling; Nitrate; Biomass.
Ano: 2004
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1899

Variabilidad fitoplanctónica en 5 bahías, Islas Galápagos (Ecuador)
Provedor de dados: 20
Autores: Tapia, M.E.; Torres, G.
El aporte de esta investigación, será dar una evaluación sobre la distribución cuali-cuantitativamente del fitoplancton y paralelamente iniciar una base de datos en 5 bahías de las Islas Galpagos.
Tipo: Journal Contribution
Palavras-chave: Variability; Phytoplankton; Chlorophylls; Biomass; Geographical distribution; Species diversity; Phytoplankton; Biomass; Geographical distribution; Chlorophylls; Species diversity; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2000
URL: http://hdl.handle.net/1834/2239

Standing Stock, Agar Yield and Properties of Gracilaria salicornia Harvested along the Tanzanian Coast
Provedor de dados: 20
Autores: Buriyo, A.S.; Kivaisi, A.K.
Seasonal biomass variation and agar yield of G. salicornia (C. Ag.) Dawson from Oyster Bay, Dar es Salaam, and Chwaka Bay, Zanzibar, were determined, and some properties of the agar examined. Mean biomass and canopy cover values ranged from 21–60 g/m2 and 7– 20 %, respectively. The highest mean biomass and cover values were obtained during the SE monsoon. Agar yield varied from 13.7 to 30.2 % (dry weight) and was highest during the dry NE monsoon period. Alkali treatment generally reduced agar yield by 25–56 %. Gel strength of the agar gels ranged between 118 and 251 g/cm2 and was significantly higher during the NE monsoon period (t = 2.2; P = 0.04 and t = 8.9; P &lt;&lt; 0.05) for samples collected from Oyster Bay and Chwaka Bay respectively). Mean gel...
Tipo: Journal Contribution
Palavras-chave: Agar; Biomass.
Ano: 2003
URL: http://hdl.handle.net/1834/964

Evaluación de corvina rubia (Micropogonias furnieri) en el área del Río de la Plata y Zona Común de Pesca argentino-uruguaya por medio de un modelo de dinámica de biomasa
Provedor de dados: 20
Autores: Carozza, C.R.; Hernandez, D.R.; Perrotta, R.G.
Whitemouth croaker (Micropogonias furnieri)has a broad distribution along the Atlantic coast of the Americas, from Mexico to the south of the Province of Buenos Aires, Argentina. At the southern end of distribution, Argentina and Uruguay catch the species with different commercial fleet types bay or creek, coastal and off-shore and modalities of bottom trawling with doors and paired trawling. Maximum catches of both countries, that reached 60,000 t, were registered between 1995 and 1997. After that period a remarkable decrease was observed, specially in Argentina where catches remained at around 6,000 t over a total of 30,000 t for both countries. The commercial fleet was divided in three categories and the total area of study in three subareas: El Salado,...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Catch/effort; Risks; Biomass; Depleted stocks; Mathematical models; Coastal fisheries; Commercial fishing; Stock assessment; Biomass; Mathematical models; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24199; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 2004
URL: http://hdl.handle.net/1834/1503

Estimation du stock naturel de l’algue brune &lt;Padina pavonica&gt; (l.) thivy en Tunisie septentrionale
Provedor de dados: 20
Autores: Ksouri, J.; Elferjani, H.; Mensi, F.
L’identification d’un principe actif servant en thérapie osseuse a propulsé l’algue brune Padina pavonica au rang des algues à intérêt économique très prisées à l’échelle mondiale et en Tunisie. L’évaluation des potentialités de cette espèce au niveau d’un site atelier, Cap Zebib (Nord-Est de la Tunisie), a été initiée pour éclairer les décideurs sur l’état du stock, afin que l’autorisation pour la collecte d’un certain tonnage de cette algue soit accordée en connaissance de cause. A Cap Zebib, l’espèce en question étant localisée dans la zone comprise entre 0 et 10 m, la biomasse naturelle disponible est évaluée à 112,5 tonnes de matière fraîche, soit 25 tonnes de matière sèche (22,2%). Le rendement global est de 0,850 t/ha. Mais, comme la majeure partie...
Tipo: Journal Contribution
Palavras-chave: Biomass; Commercial species; Seaweed products; Seaweeds; Stock assessment.
Ano: 2008
URL: http://hdl.handle.net/1834/4251

Una aplicación de los estudios ambientales para orientar la pesqueria de la caballa Scomber japonicus en Mar del Plata
Provedor de dados: 20
Autores: Perrotta, R.G.; Pertierra, J.P.; Viñas, M.D.; Macchi, G.J.; Tringali, L.S.
Both mackerel mean biomass and mean fishing effort in Buenos Aires (Argentina) shelf during the period 1990-91/1994-95 were estimated. Those values were 85,792 t and 42,051 minutes, respectively. However, the best economic profit from the fishery (about $15,390,036)($1=U$S1) was estimated to take place at 28,000 minutes. It was observed a waste in fishing effort of the commercial fleet related with sea surface temperatures of 19°C or more. Moreover, adult mackerel find better trophic conditions on the continental shelf (depth 50m), while larvae originated from massive spawning in late November-early December, i.e., during the main fishing season, find their optimum at lower depths. Mackerel shoals enter and leave fishing grounds in a counterclockwise way...
Tipo: Journal Contribution
Palavras-chave: Mackerel fisheries; Biomass; Catch/effort; Environmental conditions; Economic models; Commercial fishing; Biomass; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1998
URL: http://hdl.handle.net/1834/2465

Larvas de peces clupeiformes y microzooplankton en la estación fija "La Libertad" desde noviembre de 1999 a julio del 2000
Provedor de dados: 20
Autores: Luzuriaga de Cruz, M.
Uno de los principales objetivos es la evaluación de los impactos que los eventos de El Niño tienen en las poblaciones del ictioplancton, con especial referencia a huevos y larvas de especies de interés comercial. Para el efecto se utilizan también, a más de los datos oceanográficos, especies de foraminíferos planctónicos como indicadores del estado del ecosistema. En el presente documento se detalla la distribución de larvas de Sardinops sagax (sardina), Ophistonema sp., Cetengraulis mysticetus (chuhueco), Anchoa y Engraulis ringens (anchoveta) durante el primer semestre del año 2000.
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Biological production; Biomass; Zooplankton; Distribution; Fish eggs; Fish larvae; El Nino phenomena; Environmental impact; Fixed stations; Biological production; Biomass; Zooplankton; Distribution; Environmental impact; Fish larvae.
Ano: 2004
URL: http://hdl.handle.net/1834/2284

Variación espacio-temporal de grupos morfo-funcionales de macroalgas  en pastos marinos al norte de Ciego de Ávila, Cuba
Provedor de dados: 20
Autores: Avila Alonso, D.; Guimaraes Bermejo, M.; Cárdenas Ortiz, R.
Se determinó la variación espacio-temporal de la biomasa de  los grupos morfo-funcionales de macroalgas y su relación con  las variables ambientales: temperatura, salinidad, oxígeno disuelto y precipitaciones en dos localidades (laguna y playa) de  pastizales al Norte de Ciego de Ávila desde marzo de 2010 a  febrero de 2011. Las colectas se realizaron utilizando marco  cuadrado de 25 cm de lado y se tomaron 15 unidades de muestreo en cada sitio. Se determinaron cinco grupos morfo- funcionales: foliosas y globosas, coriáceas, filamentosas, corticadas y calcáreas articuladas, presentando variaciones espacio- temporales los dos últimos. La laguna tuvo menor diversidad algal (13 géneros) y mayor biomasa total determinado por el  aporte de las calcáreas...
Tipo: Journal Contribution
Palavras-chave: Biomass; Morphometric analysis; Algae; Seagrass; Environmental factors.
Ano: 2013
URL: http://hdl.handle.net/1834/4929

Distribución del primer  nivel trófico (fitoplancton) en el Pacífico ecuatoriano, período 1996-1997 (pre-El Niño)
Provedor de dados: 20
Autores: Tapia, M.E.; Torres, G.
Este artículo describe las condiciones bio-oceanográficas del primer nivel trófico, distribución y concentración de la biomasa fitoplanctónica (clorofila "a") y contajes celulares) a nivel superficial y subsuperficial de la capa fótica a los 75 m. de profundidad, se da la distribución de especies indicadoras del fitoplancton y su relación con las variables de temperatura y nutrientes, registrados en tres cruceros oceanográficos realizados en octubre/1996, abril-mayo/1997 y agosto/1997.
Tipo: Journal Contribution
Palavras-chave: Distribution; Biomass; Chlorophylls; Phytoplankton; Indicator species; El Nino phenomena; Trophic levels; Multiship expeditions; Distribution; Biomass; Phytoplankton; Trophic levels; Chlorophylls; Indicator species.
Ano: 1998
URL: http://hdl.handle.net/1834/2280

Composición y distribución de la biomasa del plancton en el frente ecuatorial
Provedor de dados: 20
Autores: Jiménez, R.; Bonilla, D.
Este trabajo presenta los resultados de la distribución de la biomasa y composición del fitoplancton y zooplancton en el frente ecuatorial, cuya presencia caracteriza las condiciones consideradas como "normal" para el sistema de circulación oceánica del Pacífico Tropical.
Tipo: Journal Contribution
Palavras-chave: Composition; Distribution; Biomass; Cruises; Phytoplankton; Zooplankton; Distribution; Biomass; Phytoplankton; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490.
Ano: 1980
URL: http://hdl.handle.net/1834/2090

Diversidad del plancton en el estuario interior de Puerto Bolívar, Ecuador durante julio de 2002
Provedor de dados: 20
Autores: Tapia, M.E.; Naranjo, Ch.
Los objetivos del presente estudio son:- Establecer el estado actual del plancton en el estero Santa Rosa, estero Jambelí y río Jubones durante las fases de flujo y reflujo. - Determinar la productividad, dominación y diversidad del plancton presentes en el área de estudio.
Tipo: Journal Contribution
Palavras-chave: Species diversity; Biological production; Plankton; Phytoplankton; Zooplankton; Biomass; Biological production; Plankton; Phytoplankton; Zooplankton; Biomass; Species diversity; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2004
URL: http://hdl.handle.net/1834/2293

Diversidad, densidad y biomasa de la macrofauna componente de los fondos de pesca 'camaron-langostino', frente a Mar del Plata, Argentina (1998-1999)
Provedor de dados: 20
Autores: Scelzo, M.A.; Martínez Arca, J.; Lucero, N.M.
The seasonal variation of diversity, density and biomass of the main species of the bentho-demersal fauna present in the 'prawn-shrimp' fishing grounds in the coastal sector between Cabo Corrientes and Torreon del Monje, Mar del Plata (38 degree S-57 degree W), Argentina, was studied. The quali-quantitative information obtained allowed to know the fluctuations of the bentho-demersal components of the community. The study included the annual cycle between April 1998-April 1999. Monthly samples at different depths (4-10 m) and distance from the coast (500 and 1,000 m) were obtained in two stations using a bottom net. Sampling in each station lasted 15 minutes and covered 2,400 m super(2). Number of specimens and weight for each species were recorded....
Tipo: Journal Contribution
Palavras-chave: Zoobenthos; Fishing grounds; Biomass; Abundance; Littoral zone; Species diversity; By catch; Biomass; Zoobenthos; Fishing grounds; Species diversity; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_15487; Http://aims.fao.org/aos/agrovoc/c_2947; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2002
URL: http://hdl.handle.net/1834/1700

Evaluación hidroacústica del reclutamiento de anchoveta y sardina común entre la V y X Regiones, año 2003
Provedor de dados: 20
Autores: Saavedra, A.; Gálvez, P.; Barria, P.; Espejo, M.; Barbieri, M.A.; Núñez, S.; Ortiz, J.; Torres, P.; Véjar, F.; Molina, E.; Cerna, F.; López, A.A.; Bustos, L.
Se presentan los resultados de la evaluación acústica de la biomasa, abundancia y distribución espacial; oferta ambiental de alimento, y las condiciones oceanográficas físicas asociadas a la anchoveta (Engraulis ringens) y sardina común (Strangomera bentincki) en el período de reclutamiento de enero del año 2004 entre Topocalma (33º 50' S) y Punta Galera (40º 00' S).
Tipo: Report
Palavras-chave: Biomass; Abundance; Geographical distribution; Environmental conditions; Stock assessment; Echo surveys; Biomass; Geographical distribution; Stock assessment; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2004
URL: http://hdl.handle.net/1834/1738

El ecosistema de la plataforma patagónica austral, marzo-abril 2000. Composición, abundancia y distribución del zooplancton.
Provedor de dados: 20
Autores: Sabatini, M.
The abundance, distribution and structure of the zooplankton community in southern Patagonia (SW Atlantic Ocean) were studied during late summer (March-April 2000) from samples obtained with Nackthai (390 ~km) and Multinet (150 ~km) samplers. Total concentrations of zooplankton biomass, integrated in the water column, ranged between 1.0 and 14.5 g m-2 (dry weight) and reached the highest values in the mid and outer shelf off Bahía Grande (Santa Cruz Prov., Argentina) (51~'S). The &lt; 5 mm size fraction, composed mainly of copepods represented, on average, 45% of the total; amphipods and euphausiids accounted for 20% and 31%, respectively. Amphipods were, almost exclusively, Themisto gaudichaudii and euphausiids most abundant species Euphausia lucens and...
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Biomass; Population structure; Geographical distribution; Continental shelves; Zooplankton; Biomass; Population structure; Geographical distribution; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 2008
URL: http://hdl.handle.net/1834/3142

Plancton alrededor de las Islas Galápagos durante el crucero oceanográfico efectuado en mayo de 2004
Provedor de dados: 20
Autores: Tapia, M.E.; Naranjo, Ch.
El presente trabajo comprende la composición y distribución del plancton en las Islas Galápagos. Para el efecto se establecieron 13 estaciones ubicadas en las secciones 92° - 90° y 89° W, realizadas en mayo del 2004.
Tipo: Journal Contribution
Palavras-chave: Plankton; Community composition; Distribution; Phytoplankton; Zooplankton; Diatoms; Biomass; Cruises; Biomass; Plankton; Distribution; Phytoplankton; Zooplankton; Diatoms; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_32657.
Ano: 2006
URL: http://hdl.handle.net/1834/2331

Variación mensual y mareal del zooplancton en una estación fija del estero del Muerto, Golfo de Guayaquil
Provedor de dados: 20
Autores: Arcos, F.; Martínez, L.
Durante los meses de Marzo de 1983 a Febrero de 1984, se llevaron a cabo muestreos de 24 horas consecutivas en las fases llenas lunares en una estación fija en la región interior del Golfo de Guayaquil. Con esta información se han determinado variaciones mensuales y mareales del zooplancton, así como de otros parámetros ambientales, encontrándose una estrecha relación entre la abundancia de organismos y los valores de salinidad. La mayor biomasa planctónica estuvo asociada con los meses secos de alta salinidad. Analizando la variación mareal, se ha determinado que durante las mareas, existe aporte de material nutritivo desde el interior del estuario hacia la región exterior.
Tipo: Journal Contribution
Palavras-chave: Seasonal variations; Zooplankton; Biomass; Zooplankton; Biomass; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 1986
URL: http://hdl.handle.net/1834/2142

Ocurrencia de gallineta con joroba, Prionotus stephanophrys Lockington (Pisces: Triglidae) en aguas ecuatorianas, y aspectos de su comportamiento, biología y utilización
Provedor de dados: 20
Autores: Herdson, D.M.; Martínez, J.
The occurrence of gurnard Prionotus stephanophrys was studied in the course of a series of fisheries research cruises on the Ecuadorian continental shelf between 1980 and 1985. The species is common in coastal waters south of 1°S . Its abundance is very variable, possibly associated with sea temperatures. Normally densities are between 0.8 and 1.6 t.km-2. The standing stock varies between 13,000 and 150,000 t wich it is estimated can sustain catches of around 4,000 t pet year, and up to 40,000 t in times of great abundance. P. stephanophyrs is found in large shoals on the bottom during the day but a night moves up into mid-water to feed on euphausids. The fish caught had size range of 12 cm to 37 cm, but the majority were between 16 cm and 21 cm in total...
Tipo: Journal Contribution
Palavras-chave: Biomass; Abundance; Catch composition; Natural mortality; Biomass; Catch composition; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_1384.
Ano: 1985
URL: http://hdl.handle.net/1834/3157

Etude quantitative des nématodes libres des secteurs nord et est de la lagune de Bizerte (Tunisie)
Provedor de dados: 20
Autores: Essid, N.; Aissa, P.
Une étude réalisée au niveau du secteur nord et est de la lagune de Bizerte a montré que les densités et les biomasses totales et individuelles des nématodes libres marins sont étroitement dépendantes des paramètres physico-chimiques, sédimentologiques et géochimiques. En effet, les sédiments de ce secteur ont présenté en surface un faciès très fin enrichi en carbone organique, issu principalement des rejets domestiques et industriels des villes avoisinantes. Ceci favorise la formation de complexes organo-minéraux entre les particules minérales, essentiellement entre la smectite et les composés organiques. Les nématodes libres marins réagissent à ces conditions de surface non favorables par leur migration en profondeur, les individus détritivores étant...
Tipo: Journal Contribution
Palavras-chave: Population density; Biomass; Free living nematodes; Http://aims.fao.org/aos/agrovoc/c_36731.
Ano: 2002
URL: http://hdl.handle.net/1834/243

Caractérisation du peuplement pélagique de la ZEE mauritanienne à travers les campagnes acoustiques.
Provedor de dados: 20
Autores: Ould Mohamed Mahmoud, E.
Mémoire de stage de DEA en Science de l’environnement marin
Tipo: Theses and Dissertations
Palavras-chave: Pelagic fish; Stock assessment; Sampling methods; Hydroclimate; Biomass.
Ano: 2002
URL: http://hdl.handle.net/1834/257

Etude d’une population de l'algue brune Padina pavonica (L) Lamouroux a Cap Zebib (nord de la Tunisie)
Provedor de dados: 20
Autores: El Abed, A.; Ben Said, R.; Romdhane, M.S.
A population of the brown alga Padina pavonica has been studied in the locality of Cap Zebib (North of Tunisia) between September 2000 and August 2001. Abiotic factors (temperature ,salinity  , oxygen ) and biotic ones (weight, height, diameter, biomass, and fertility) were carried out . The results showed that temperature varied between 12°C (February) and 24.5 °C (July). Salinity has recorded a little variation during the year .Oxygen ranged between 4.4 mg/l( March) and 10mg/l (November).Padina pavonica changed monthly . The weight ranged between 0.39g (February) and 18.8 g (August)  . Minimum and maximum height were recorded respectively in January (2.07 cm) and September (7.3 cm) . Diameter varied between 1.32 cm (December) and 8.9 cm (August) ....
Tipo: Journal Contribution
Palavras-chave: Algae; Fertility; Biomass; Length-weight relationships; Brown algae; Http://aims.fao.org/aos/agrovoc/c_35039.
Ano: 2002
URL: http://hdl.handle.net/1834/247

A transboundary study of the pelagic fish stocks of southern
Provedor de dados: 20
Autores: Krakstad, Jens-Otto; Amaro, Aristóteles P. da S.; Shigwedha, Vaino.
The main objectives of the survey were the following: • To map the distribution and estimate the abundance of the most commercially important pelagic species in the Namibia-Angola transboundary area (15°50-19°00’), following the survey design utilized in Angolan waters (6 n.mi spacing between transect lines), with special emphasis on the two horse mackerel Cunene horse mackerel (Trachurus trecae) and Cape horse mackerel (Trachurus capensis), sardine “Pilchard” (Sardinops sagax) and other small pelagic species, including anchovy (Engraulis capensis) and round herring (Etrumeus whiteheadi). • To map the distributions and estimate the abundance of the same species in central Namibia south to Dune Point (20°15’ S), following the established survey design with...
Tipo: Report
Palavras-chave: Pelagic fisheries; Fishery surveys; Acoustics; Sampling; Trawls; Oceanography; Biomass; Distribution; Composition.
Ano: 2012
URL: http://hdl.handle.net/1834/5230

Evaluación de la polaca (Micromesistius australis) del Atlántico sudoccidental, período 1987-1999.
Provedor de dados: 20
Autores: Wöhler, O.C.; Cordo, H.D.; Cassia, M.C.; Hansen, J.E.
Taking into account the commercial catches by the Argentine fleet and other fleets that operated around Malvinas Islands (SW Atlantic) in the 1987-1999 period, the current state of southern blue whiting (Micromesistius australis) is assessed. A sequential analysis (Cohort Analysis) tuned, in an ADAPT conceptual framework with six independent indices of abundance, was performed for the southern blue whiting stock of the SW Atlantic. Commercial catch data of the Argentinian fleet and other fleets that operate around Malvinas Islands were used.The indices included catch per unit of effort of different fleets and data from Argentine-British research surveys. The analysis showed that the decreasing trend in biomass observed in previous studies went on during...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Fishing mortality; Biomass; Demersal fisheries; Statistical analysis; Gadoid fisheries; Stock assessment; Biomass; Demersal fisheries; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2002
URL: http://hdl.handle.net/1834/2546

Etude sur le savoir écologique des pêcheurs artisans des petits pélagiques en Afrique du Nord-Ouest
Provedor de dados: 20
Autores: Sall, A.
Agriculture, Nature and Food Quality, Den Haag (Netherlands); Ministerie Van Buitenlandse Zaken,  Brussel (Belgium); Wageningen International,  Wageningen (Netherlands)
Tipo: Report
Palavras-chave: Fisheries; Artisanal fishing; Fishermen; Fishing effort; Canoe fisheries; Coastal zone; Fishery engineering; Protected resources; Pelagic fisheries; Cycles; Sexual reproduction; Multispecies fisheries; Stocks; Ocean currents; Winds; Biomass; Upwelling; Ecosystems; Maritime legislation; Size; Biomass; Ecosystems; Fisheries; Fishermen; Stocks; Ocean currents; Winds; Size; Fishing effort; Pelagic fisheries; Sexual reproduction; Multispecies fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_2934; Http://aims.fao.org/aos/agrovoc/c_2936; Http://aims.fao.org/aos/agrovoc/c_28772; Http://aims.fao.org/aos/agrovoc/c_12883; Http://aims.fao.org/aos/agrovoc/c_8401; Http://aims.fao.org/aos/agrovoc/c_7093; Http://aims.fao.org/aos/agrovoc/c_24027; Http://aims.fao.org/aos/agrovoc/c_5659; Http://aims.fao.org/aos/agrovoc/c_26876; Http://aims.fao.org/aos/agrovoc/c_4987.
Ano: 2009
URL: http://hdl.handle.net/1834/3671

Acoustic surveys on the southern blue whiting (Micromesistius australis).
Provedor de dados: 20
Autores: Madirolas, A.
Two joint Argentine-British acoustic surveys specifically targeted on the southern blue whiting (Micromesistius australis) were carried out during September 1994 and 1995. The surveys confirmed the existence of a spawning concentration area located south from San Carlos Strait, in waters south of Malvinas Islands, ASW. The obtained point estimates of blue whiting abundance were 84801 t for the 1994 survey and 140953 t for the 1995 survey. The surveys also provided information on the school structure and behavior as well as some clues about the complex migration pattern of the species.
Tipo: Journal Contribution
Palavras-chave: Fishery surveys; Echo surveys; Biomass; Geographical distribution; Target strength; Biomass; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 1999
URL: http://hdl.handle.net/1834/2567

Evaluación acústica de recursos pelágicos en las Islas Galápagos (diciembre de 1994)
Provedor de dados: 20
Autores: Vicuña, H.; Chalén, X.; Mendieta, E.; Aguilar, F.
A research survey was carried out in the southeast of the San Cristóbal island of the Galápagos Province (Galápagos Islands, Ecuador), between the 6th and 23th of december 1994; a 9 637 km2 was covered, from ca., 100 m depth waters. The Simrad EK-500 (38 kHz) acoustic equipment was used on board the I/V Tohallí of the National Fisheries Institute. The catch was compounded of 98% of makarell (Scomber japonicus) and 2% of south sardine (Sadinops sagax). The estimated results for biological and acoustic parameters for S. sagax were: sex ratio (male and female): 36% y 64%; furcal length range: 21-32 cm; mean legth: 26,6 cm; mean weith: 0,254 kg; theoreticals target strength and weight target strength (TS, TSkg): -38,9 dB and -33,0 dB. Mictofid catches were not...
Tipo: Journal Contribution
Palavras-chave: Pelagic fisheries; Length-weight relationships; Biomass; Biological data; Biomass; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 1995
URL: http://hdl.handle.net/1834/3019

Evaluación pesquera del bacalao austral (Salilota australis) del Atlántico Sudoccidental
Provedor de dados: 20
Autores: Wöhler, O.C.; Cassia, M.C.; Hansen, J.E.
Information about the austral cod Salilota australis caught in the Patagonian shelf including the area around Malvinas Islands (SW Atlantic)as well as some data from annual research surveys carried out as of 1992 to 1998 were analyzed. On this basis, the fishery was studied and the abundance of the stock inhabiting the area under Argentine control was estimated. To calculate the optimum yield as a function of both age-at-first catch and fishing mortality, the Yield-per-Recruit model was used. Some biological reference points were also identified and an exploitation strategy based on low risk of collapse recommended. Austral cod landings, although small, showed an increasing trend as of 1990 that reached a maximum of 14,900 tons in 1998. Most of the catches...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Landing statistics; Fishing mortality; Fishing grounds; Risks; Demersal fisheries; Biomass; Stock assessment; Demersal fisheries; Biomass; Fishing grounds; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2947.
Ano: 2001
URL: http://hdl.handle.net/1834/1866

Evaluation des ressources côtières au Sénégal
Provedor de dados: 20
Autores: Fall, M.
La présente campagne en mer du N/O ITAF DEME constitue la 3 ième partie de l'activité d'évaluation de la biomasse en saison froide, des ressources démersales cîtères du Sénégal. Du fait de certains contraintes (réparation du bourrelet du chalut, fêtes religieuses, vote pour certains marins,etc.) elle a été programmée sur 05 jours (24-28 avril 2001). Suite logique de la mission qui l'a précédé cette sortie vise, pour l'essentiel à complèter d'abord la visite des stations restantes de la radiale X, puis à assurer celle des radiales XI et XII en zone centre. Soit un total théorique de 32 traits de chalut à réaliser.
Tipo: Book
Palavras-chave: Canoe fisheries; Fee fishing; Saline water; Water analysis; Fertility; Cruise reports; Biomass; Biomass; Saline water; Water analysis; Fertility; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_16376; Http://aims.fao.org/aos/agrovoc/c_16064; Http://aims.fao.org/aos/agrovoc/c_2862.
Ano: 2001
URL: http://hdl.handle.net/1834/1712

Distribución cuali-cuantitativa del fitoplancton en el Pacífico sureste (3°16'-31°23'S), durante El Niño 1997-1998
Provedor de dados: 20
Autores: Torres, G.
El objetivo del presente artículo es estudiar la distribución de las concentraciones de clorofila "a" y feopigmentos en diciembre/97 y marzo/98, y cuales serían los indicadores biológicos del fitoplancton que han avanzado con la corriente cálida hacia el sur en diciembre/97, en condiciones de El Niño 97-98, en el Pacífico sudeste exceptuando la región peruana (Fig.1).
Tipo: Journal Contribution
Palavras-chave: Distribution; Phytoplankton; Biomass; Community composition; Diatoms; El Nino phenomena; Oceanographic stations; Chlorophylls; Distribution; Phytoplankton; Biomass; Diatoms; Chlorophylls.
Ano: 1998
URL: http://hdl.handle.net/1834/2393

Dinámica del ultrafitoplancton en el Mar Argentino
Provedor de dados: 20
Autores: Silva, R.I.
Ultraphytoplankton is composed by a group of organisms phylogenetically diverse, which contribute significantly to the total biomass and primary production in different oceanic and coastal pelagic systems. The success of ultraphytoplankton is attributed to its high efficiency in capturing light and nutrients, due to their small cell size and low sinking rate. The community structure is driven by the interaction among biotic and abiotic variables, such as temperature, nutrients, light and predators. The objective of this work was to assess the ecological importance of ultraphytoplankton organisms at the EPEA station, situated in the Buenos Aires coastal pelagic system (Argentina, SW Atlantic), during the period 2000-2009. In particular, ultraphytoplankton...
Tipo: Theses and Dissertations
Palavras-chave: Phytoplankton; Seasonal variations; Environmental factors; Community composition; Biomass; EPEA; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4504

Evaluation et cartographie des stocks de coquillages dans la partie marine de la région de Zarzis
Provedor de dados: 20
Autores: Ben Abdallah, O.; Ben Hadj Hamida, N.; Jarboui, O.
The experimental survey done, in august 2005, in coastal marine zone (0 - 20 m) of Zarzis showed the existence of numerous species of shellfishes of which Tricolia speciosa, Smaragdia viridis, Nassarius incrassatus, Cerithium vulgatum and Gibbulla umbilicaris are the most important gasteropods and, Pinctada radiate and Donax trunculus the main bivalves. The biomasses estimation, based on the method of swept area, in the studied zone showed that P. radiate is the most abundant species with about 20 000 tones, followed by C. vulgatum (7 645 tones) and T. speciosa (more than 1 000 tones). The Donax trunculus biomass is very low with only 13 tones. Finally, the abundance indexes distribution cartography permitted us to note that it varies from one species to...
Tipo: Journal Contribution
Palavras-chave: Biomass; Cartography; Geographical distribution; Marine crustaceans; Shellfish; Stock assessment; Biomass; Geographical distribution; Shellfish; Stock assessment; Cartography; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_7033; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_1344.
Ano: 2006
URL: http://hdl.handle.net/1834/4272

Résultats des campagnes Echosar 1 (février 1980) et Echosar 2 (septembre 1980). Propection des stocks pélagiques le long des côtes du Sénégal, de la Gambie et de la Mauritanie
Provedor de dados: 20
Autores: Marchal, E.; Josse, E.; Gerlotto, F.; Lopez, J.
Tipo: Working Paper
Palavras-chave: Hydrology; Physical oceanography; Pelagic fisheries; Coastal fisheries; Biomass; Physical oceanography; Biomass; Hydrology; Pelagic fisheries; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_5830; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_3731; Http://aims.fao.org/aos/agrovoc/c_5659; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 1982
URL: http://hdl.handle.net/1834/1743

Investigación y manejo de praderas de luga roja en la XII Región
Provedor de dados: 20
Autores: Ávila, M.; Cáceres, J.; Núñez, M.; Camus, P.; Pavez, H.; Cortés, H; González, J.; Tapia, C.; Mejías, P.; Cornejo, S.; Romo, H.; Candia, A.
El objetivo del proyecto es desarrollar un plan de manejo del recurso luga roja. Este objetivo se logra a través de los siguientes objetivos específicos: determinar el (los) períodos óptimos de cosecha para las praderas de la XII Región, que permitan maximizar la biomasa obtenida conservando la capacidad productiva del recurso; diseñar y evaluar estrategias de manejo del recurso en la XII Región.
Tipo: Report
Palavras-chave: Algae; Biomass; Reproduction; Resource management; Harvesting; Biomass; Algae; Reproduction; Resource management; Harvesting; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_258; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_6524; Http://aims.fao.org/aos/agrovoc/c_3500.
Ano: 2004
URL: http://hdl.handle.net/1834/1736

Ficoflora de los arrecifes coralinos del archipiélago Sabana-Camagüey, Cuba
Provedor de dados: 20
Autores: Zúñiga-Ríos, D.; Martínez-Daranas, B.; Alcolado, P. M.
Para obtener una primera aproximación al conocimiento de las comunidades de macroalgas de los arrecifes de coral del archipiélago Sabana–Camagüey, se realizaron muestreos en 10 perfiles a lo largo del gradiente de profundidad, ubicados en los arrecifes de borde de plataforma de los cayos Sabinal, Guajaba, Confites, Coco, Paredón del Medio, Oeste de cayo Guillermo, Caimán Grande, Francés, Fragoso y Esquivel. En cada perfil se tomaron muestras de algas en cuatro estaciones situadas en la zona trasera del arrecife a 1 m de profundidad, y en el arrecife frontal a 5, 10 y 20 m de profundidad. Estas fueron tomadas con un colector hidroneumático circular de 0.07 m2 de área. Se encontraron 130 especies de algas. La mayor riqueza de especies se presentó en las...
Tipo: Journal Contribution
Palavras-chave: Algae; Biomass; Coral reefs; Algae; Biomass; Coral reefs.
Ano: 2012
URL: http://hdl.handle.net/1834/4589

Sobre los conceptos de utilización de biomasa excedentes de merluza de cola Macruronus magellanicus bajo esquemas de administración pesquera basadas en F 0,1, y F 30. RDP.
Provedor de dados: 20
Autores: Ehrhardt, N.M.; Legault, C.; Prenski, L.B.
In this work we present a process of risk analysis related to the adoption of a Total Allowable Catch (TAC)based in series of allowable biological catches which contain uncertainty derived of the recruitment patterns which characterize the stock. With the information obtained by the F0,1, and F30. RDP, the exploitation ratio and with the 500 values of the projected biomass of 1995 obtained by Monte Carlo simulation, we calculate the distribution of the allowable biological catches under a scheme of F0,1, and F30. RDP andfor a natural mortality of 0.38. The selected TAC is expected to beas closer as possible to the reference fishery mortality F0,1, and F30. RDP. As a result of the present risk analysis in this study in Macruronus magellanicus of the SW...
Tipo: Journal Contribution
Palavras-chave: Fishery management; Risks; Biomass; Statistical analysis; Gadoid fisheries; Fishery management; Biomass; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 1997
URL: http://hdl.handle.net/1834/1936

Evaluation of the Status of the Namibian Hake Resource (Merluccius spp.) Using Statistical Catch-at-Age Analysis
Provedor de dados: 20
Autores: Kirchner, Carola; Kainge, Paul; Kathena, Johannes.
Namibian hake is the most important fish resource in Namibia. This monograph is a compilation of all the hake data, historic and recent, that has been used to inform stock assessment and management since the late 1970s. It presents the statistical catch-at-age analysis used to evaluate the state of the Namibian hake resource under different assumptions. This analysis treats the two hakes, Merluccius paradoxus and M. capensis, as a single stock. The data and modeling show that the stock has not as yet recovered to its maximum sustainable yield level, despite foreign fishing effort having been removed in 1990. Best estimates suggest the current stock to be roughly 20% of pre-exploitation levels; however this figure is sensitive to model assumptions. Signs...
Tipo: Book Section
Palavras-chave: Stock assessment; Gadoid fisheries; Data; Dynamics; Surveys; Commercial species; Total allowable catch; Biomass; Trawls; Otoliths; Fishing mortality; Fisheries management; Reproductive system.
Ano: 2012
URL: http://hdl.handle.net/1834/5166

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

La caballa (Scomber japonicus) y las condiciones ambientales en el area bonaerense de El Rincón (39°- 40°30' S), agosto 1996.
Provedor de dados: 20
Autores: Perrotta, R.G.; Madirolas, A.; Viñas, M.D.; Akselman, R.; Guerrero, R.A.; Sánchez, M.F.; López, F.; Castro Machado, F.; Macchi, G.J.
In August 1996 acoustic methods were employed to estimate mackerel (Scomber japonicus) abundance in the Buenos Aires, Argentina shelf area of "El Rincón" (4,287 mn2), located between 39°- 40° 30' S. Results showed a biomass estimate of 77,260 t. ASIMRAD EK-500 equipment operated with a 38 KHz split-beam transducer was used. Midwater fishing trawls were employed to identify echotraces and to collect mackerel samples.Trawls 4 and 5 were the most successful. Samples included only adult fish  (310-470 mm Lt and ages ranging 2-11). Length and weight growth parameters and mortality rates were estimated. Analysis of the stomach contents revealed that mackerel was feeding exclusively on zooplankters over 2 mmlength. The analysis of the characteristics (dimensions...
Tipo: Journal Contribution
Palavras-chave: Abundance; Biomass; Population structure; Zooplankton; Environmental conditions; Echo surveys; Biomass; Population structure; Zooplankton; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1999
URL: http://hdl.handle.net/1834/2529

Variabilidad estacional del plancton en la Bahía de Manta en la costa ecuatoriana, durante el 2011
Provedor de dados: 20
Autores: Naranjo, Ch.; Tapia, M.E.
In 2011, in the Bay of Manta was presented a high diversity of phytoplankton species, determining a total of 75 species, 29 groups for the zooplankton, which were identified to species level the Phylum Chaetognatha identified 6 species and Cladocera with 2 species. The seasonal time during 2011, did not influence the average abundances of the dominant species of phytoplankton and zooplankton, using the student T Test statistic with 95% confidence However specific tests were performed between different stations have a greater diversity of species and stations with less diversity, showing a significant difference in the mean of the population of phytoplankton. The oceanographic conditions recorded in the Equatorial Pacific states mainly cooling during...
Tipo: Journal Contribution
Palavras-chave: Variability; Plankton; Chlorophylls; Biomass; Species diversity; Seasons.
Ano: 2013
URL: http://hdl.handle.net/1834/5760

Estimaciones de la biomasa de merluza (Merluccius hubbsi) en los sectores argentino y uruguayo de la Zona Común de pesca argentino-uruguaya (34º 00º S-39º 30º S) Y en el área que se extiende hasta 41º S (ZEE Argentina) en 1994, 1996-2001 y 2003
Provedor de dados: 20
Autores: Bezzi, S.I.; Ibáñez, P.M.
Hake (Merluccius hubbsi) biomass in the Argentine and Uruguayan sectors of the Argentine-Uruguayan Common Fishing Zone (AUCFZ) and in the area that extends from the limit of the shared zone to 41° S was estimated (SW Atlantic Ocean). The contribution to the strata total biomass in each sector was analyzed and complemented with observations on the structure of the population. The basic data to estimate biomass derived from the evaluation surveys of the Hake Project carried out in winter or spring 1994, 1996-2001 and 2003. In 1999 biomass north of 41° S decreased to 30.  (112,280 t) of the estimates made for 1994. In 2000 it increased to 165,000 t and in 2003 it was estimated at 156,407 t. A remarkable decrease of the AUCFZ percentage of contribution to the...
Tipo: Journal Contribution
Palavras-chave: Size distribution; Biomass; Population structure; Exclusive economic zone; Biomass; Population structure; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115.
Ano: 2009
URL: http://hdl.handle.net/1834/3463

Aspectos ecológicos del plancton en las riberas del humedal Isla Santay, Río Guayas durante los años 2000 y 2002
Provedor de dados: 20
Autores: Tapia, M.E.; Naranjo, Ch.
El objetivo del presente estudio es conocer la distribución cualitativa y cuantitativa de las especies del fitoplancton, zooplancton e ictioplancton y su relación con las condiciones ambientales durante el período en estudio.
Tipo: Journal Contribution
Palavras-chave: Species diversity; Plankton; Phytoplankton; Zooplankton; Ichthyoplankton; Biomass; Abundance; Biological production; Marine ecology; Temporal variations; Plankton; Phytoplankton; Zooplankton; Biomass; Biological production; Species diversity; Marine ecology; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_4609.
Ano: 2007
URL: http://hdl.handle.net/1834/2371

Comparación experimental de las cepas colombianas de Artemia (Galerazamba, Manaure y Pozos Colorados)
Provedor de dados: 20
Autores: Newmark-Umbreit, F.
Se examinaron en el laboratorio las influencias de la densidad de siembra y la salinidad en la producción de biomasa, el crecimiento y la madurez sexual de cepas Colombianas de Anemia.  Los resultados indican (P&lt;0.05) que cuando se combinan densidades de siembra bajas (10 na up I ios/1 ¡tro) y salinidades de 130°/oo, se incrementa el crecimiento, la madurez sexual, y la producción de biomasa de las tres cepas estudiadas. La cepa de Galerazamba se apartó un poco de dicho comportamiento al presentar producciones importantes de biomasa y de hembras maduras sexualmentea salinidades de 130°/ooy densidades de 50 nauplios/litro. Finalmente, con base en las diferencias biométricas y el comportamiento del cultivo experimental, se concluye que la cepa de...
Tipo: Journal Contribution
Palavras-chave: Interspecific relationships; Marine crustaceans; Carcinology; Bioassays; Salinity effects; Biomass; Density; Bioassays; Biomass; Density; Http://aims.fao.org/aos/agrovoc/c_15731; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2186.
Ano: 1990
URL: http://hdl.handle.net/1834/3888

Evaluación hidroacústica del recurso jurel entre la V y X Regiones, año 2003
Provedor de dados: 20
Autores: Córdova, J.; Barbieri, M.A.; Espejo, M.; Núñez, S.; Ortiz, J.; Torres, P.; Bustos, L.; Véjar, F.; Catasti, V.; Valenzuela, V.
El presente informe contiene los resultados de la cuantificación de la biomasa por hidroacústica del jurel (Trachurus murphyi) en la zona centro-sur, la distribución e indicadores biológicos del jurel, las condiciones ambientales y las relaciones entre éstas y la distribución del recurso.
Tipo: Report
Palavras-chave: Biomass; Population number; Echo surveys; Environmental conditions; Vertical distribution; Geographical distribution; Biomass; Geographical distribution; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2004
URL: http://hdl.handle.net/1834/1731

Evaluación del stock desovante de anchoveta en la I y II Regiones, año 2004. Informe Final Consolidado Corregido (FASE 1 y FASE 2)
Provedor de dados: 20
Autores: Braun, M.; Claramunt, G.; Valenzuela, V.; Herrera, G.; Reyes, H.; Pizarro, M.; Saavedra, J.; Catasti, V.; Young, Z.; Serra, R.
Una metodología alternativa para la evaluación de la biomasa desovante en peces pelágicos como la anchoveta, corresponde al Método de Producción de Huevos (MPH), desarrollada en 1980 por investigadores del Southwest Fisheries Sciences Center, La Jolla, California. La producción diaria de huevos se estima a partir del número de huevos totales evaluados en una prospección ictioplanctónica, en asociación a otras variables, y la fecundidad específica diaria de la población adulta se determina mediante el procesamiento de muestras de peces, obtenidas durante cruceros de pesca, las que proporcionan información respecto de la fecundidad parcial, peso promedio de hembras, frecuencia del desove y proporción de sexos.
Tipo: Report
Palavras-chave: Spawning populations; Pelagic fisheries; Biomass; Fish eggs; Biomass; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2005
URL: http://hdl.handle.net/1834/1739

Patrones de distribución de las anomalías de temperatura superficial en el Mar Argentino. Su relación con la distribución de especies de interés comercial
Provedor de dados: 20
Autores: Sanahuja, G.
The present research studies the spatial-temporal distribution patterns of the sea surface temperature anomalies (SSTA) and its relation with some of the most relevant commercial species in the Argentine Sea (SW Atlantic). The analysis is based on a monthly and weekly temporal series of the ATSM data and the sea surface temperature (SST) covering the period of December 1981 through November 2004, using the Reynolds/NCEP database as data source. The spatial scope of the study covers an area from the 33° S to 59° N, and includes the area within the coastal line and the 50 W, including the whole continental shelf, the shelf break zone, and the adjacent oceanic region. In order to assess the consistency of Reynolds/NCEP data for the purposes of this research a...
Tipo: Theses and Dissertations
Palavras-chave: Surface temperature; Temperature anomalies; Temporal variations; Commercial species; Biomass; Environmental effects; Biomass; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2007
URL: http://hdl.handle.net/1834/2562

Réactualisation des évaluations du stock de la crevette,Penoeus kerathurus (Forskal, 1775), du golf de Gabès, Tunisie
Provedor de dados: 20
Autores: Jawadi, G.; Ben Mariem, S.
تـم إعداد قاعدة بيانات شملت خاصة بيانات الأطوال و الثوابت البيولوجية  للقمبري الملكي المستغل بمنطقة خليج قابس و ذلك لتحبين تقييم المخزون بواسطة النماذج التحليلية لهذا النوع. و ارتكزت النماذج التحليلية التي اعتمدت في هذه الدراسة على تحليل أجيال الأطوال و إنتاجية الانتدابات. و لقد تم هذا العمل في إطار نشاط مختبر الأحياء البحرية بالمعهد الوطني لعلوم و تكنولوجيا البحار ضمن البرنامج الوطني لتقييم الثروة السمكية. و بينت النتائج ما يلي: -  أن مخزون القمبري الملكي في حالة استغلال قريبة من المثلى و أن النفوق الناتج عن الصيد معتدلا و يستهدف القسم البالغ من المخزون. - كل تخفيض في مستوى مجهود الصيد الحالي ينجر عنه نقصان في الإنتاج المستدام للمصايد. بينما  تتحمل هذه المصايد زيادة في مجهود الصيد لكن الربحية المستدامة في الإنتاج تبقي ضعيفة. - إن الزيادة في الحجم الأدنى...
Tipo: Journal Contribution
Palavras-chave: Penaeus kerathurus; Benthos; Biomass; Fishery management; Fishing mortality; Shrimp fisheries; Stock assessment; Benthos; Biomass; Fishery management; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_24251.
Ano: 2007
URL: http://hdl.handle.net/1834/4150

Distribución de la biomasa de las fracciones planctónicas &lt; 200 μM y su contribución relativa a la biomasa total en las aguas oceánicas de la región noroccidental de Cuba.
Provedor de dados: 20
Autores: Orozco, M.V.; Loza, S.; Lugioyo, M.
Se evaluó el patrón de distribución espacial así como la contribución de las fracciones del plancton a la biomasa planctónica menor de 200 μm en la región NW de las aguas oceánicas adyacentes a Cuba en muestreos realizados en época de invierno (febrero de 1997 y marzo 1999). Los valores de la biomasa bacteriana variaron entre 1.6 y 11.4 mgC m-3, del nanoplancton entre 5.2 y 20.8 mgC m-3 (Xmedia = 11.4 ± 5.4 mgC m-3) y la del microzooplancton entre 4.2 y 15.5 mgC m-3 (Xmedia = 7.9 ± 3.2 mgC m-3). El microfitoplancton presentó valores de biomasa que variaron entre 1.95 y 15.7 mgC m-3 (Xmedia = 8.8 ± 3.7 mgC m-3). Los mayores valores de biomasa de todas las fracciones estudiadas se encontraron en las aguas oceánicas adyacentes a la zona entre las bahías de...
Tipo: Journal Contribution
Palavras-chave: 1461; Biomass; Bacteria; Nanoplankton; Oceanic waters; Zooplankton; Phytoplankton; Biomass; Bacteria.
Ano: 2009
URL: http://hdl.handle.net/1834/4119

Abondonce relative et estimation de la biomasse des petits pelagiques des eaux tunisiennes
Provedor de dados: 20
Autores: Hattour, A.; Ben Abdallah, L.; Guennegan, Y.
Within the frame of the National Program (PNM), 'Assessment of Marine Tunisian Resources' (1996-1999), two prospecting surveys on small pelagic fishes, have been led in narrow collaboration with French Institute IFREMER. Their objectives were to specify the relative fishes abundance, their spatial-temporal variability but also to quantify the maximum sustainable yield (MSY) of this resource. A third important goal was to familiarize a Tunisian scientist team, with numerical methods and data processing used during the cruises (reading of echograms, treatments of data, etc.) in stocks assessment. It is known that the indirect stocks assessment methods of small pelagic species is not reliable, reason for which we opted to apply echo - integration techniques....
Tipo: Journal Contribution
Palavras-chave: Abundance; Biomass; Fishery surveys; Pelagic fisheries; Potential yield; Stock assessment; Biomass; Stock assessment; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2004
URL: http://hdl.handle.net/1834/4237

Areas de mayor productividad biológica (clorofila "a") en el Pacífico Ecuatorial (82°W-92°W) durante 1988-1999 y su relación con eventos El Niño
Provedor de dados: 20
Autores: Torres, G.
El objetivo de la presente investigación, fue diagnosticar las áreas de mayor productividad biológica en base a Clorofila "a" superficial y subsuperficial, durante la década 1989-1999 para la región del Pacífico Tropical (Ecuador).
Tipo: Journal Contribution
Palavras-chave: Biological production; Chlorophylls; Upwelling; Biomass; Water masses; Nutrients (mineral); El Nino phenomena; Cruises; Biological production; Biomass; Chlorophylls.
Ano: 2006
URL: http://hdl.handle.net/1834/2302

Distribución estacional y ecología de las medusas (Cnidarias: Hydrozoa) en la zona costera sur de la Bahía de Santa Elena durante el período (Octubre 2004-octubre 2005)
Provedor de dados: 20
Autores: Andrade Ruíz, C.E.
La presente investigación se desarrolló en el sector sur de la Bahía de Santa Elena durante octubre 2004 a octubre 2005, analizándose un total de 144 muestras zooplanctónicas e identificándose 24 especies, clasificados en 6 órdenes: 5 de la clase Hydrozoa, con 16 familias; 22 géneros y 22 especies, y 2 clases: La clase Scyphozoa y Cubozoa con 1 especie respectivamente. Se consideró las dos épocas estacionales (lluviosa y seca) registrándose para la época lluviosa el 41% de biomasa total con 6477 ind. (100m3-1), mientras que en la época seca se registró el 59% de biomasa total con 9159 ind. ((100m3-1). El análisis estadístico determinó cambios entre la estación lluviosa con una correlación positiva promedio vs la temperatura con valores de 0.75. Mientras en...
Tipo: Journal Contribution
Palavras-chave: Seasonal distribution; Biomass; Dry season; Rainy season; Species diversity; Zooplankton; Hydrobiology.
Ano: 2012
URL: http://hdl.handle.net/1834/4710

Diagnóstico del plancton en el estuario de San Lorenzo en agosto 2006 (Esmeraldas-Ecuador)
Provedor de dados: 20
Autores: Torres, G.; Andrade, C.
Se realizó un monitoreo del plancton en el estuario de San Lorenzo en junio 2006. En los resultados se registró 128 especies del fitoplancton (método cuantitativo) y 50 especies (cualitativo). Las diatomeas más representativas fueron S. costatum, T. nitzschioides, P. longissima, L. danicus, Navicula sp., P. sulcata: T. nitzschioides. Thalassiosira sp. y flagelados (cuantitativo); S. costatum, Coscinodiscus sp., N. sigma y P.  Sulcata (cualitativo). La presencia de Gymnodinium sp. P. maximun y M. rubrum podría asociarse con la formación de mareas rojas al interior del estuario. En los resultados del zooplancton registrarón 16 taxas constituidos mayoritariamente por Zoeas de Brachiura y Copépodos, distribudidos en toda el área de estudio principalmente en...
Tipo: Journal Contribution
Palavras-chave: Plankton; Diatoms; Phytoplankton; Zooplankton; Biomass; Fish larvae; Eggs; Abundance; Estuaries; Species diversity; Zooplankton; Biomass; Eggs; Estuaries; Plankton; Phytoplankton; Fish larvae; Species diversity; Diatoms; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_32657.
Ano: 2007
URL: http://hdl.handle.net/1834/2378

Distribución batimétrica, espacial y temporal del macrozoobentos en el Canal Beagle, Tierra del Fuego, Argentina
Provedor de dados: 20
Autores: Diez, M.
El Canal Beagle (Tierra del Fuego, Argentina) se encuentra en el sistema de canales fueguinos que representa el ambiente marino subantártico costero más estrechamente relacionado con la Antártida. Además, el Canal Beagle constituye una vía de intercambio de fauna y flora ente los océanos Pacífico y Atlántico. El objetivo de este trabajo fue determinar la composición, abundancia y biomasa del macrozoobentos en el Canal Beagle como también la producción secundaria de los ensambles bentónicos. Durante 1999 y 2000, en forma estacional, en tres áreas diferentes y en dos rangos de profundidad: 40m y 70m, se tomaron muestras del macrozoobentos mediante el uso de una rastra epibentónica. Los organismos se identificaron y cada taxón se contó y pesó para determinar...
Tipo: Theses and Dissertations
Palavras-chave: Zoobenthos; Seasonal distribution; Abundance; Biomass; Secondary production; Marine environment; Biomass; Marine environment; Zoobenthos; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_15487.
Ano: 2006
URL: http://hdl.handle.net/1834/3545

La comunidad bentónica intermareal de Brachidontes rodriguezii (D'Orb.) y su relación con el efluente cloacal de la ciudad de Mar del Plata (38° S)
Provedor de dados: 20
Autores: Vallarino, E.A.
El mitílido Brachidontes rodriguezii es el organismo estructurante de una compleja comunidad intermareal que se desarrolla sobre los sustratos intermareales duros (cuarcíticos y limo- loessoides), en el sudeste de la provincia de Buenos Aires (Argentina). El presente estudio se desarrolló durante los años 1997, 1998, 1999 y 2000, en áreas costeras de los alrededores de Mar del Plata (Camet); Santa Clara del Mar (Santa Elena) y en Mar de Cobo. Se determinaron cuatro estaciones de muestreo en la zona de Camet (área impactada) y dos áreas control en Santa Elena y Mar de Cobo. En cada muestreo se tomaron muestras biológicas, de sedimento retenido y de Materia orgánica, así como de las variables ambientales: temperatura, salinidad, oxígeno disuelto, turbidez y...
Tipo: Theses and Dissertations
Palavras-chave: Intertidal environment; Biological sampling; Environmental factors; Pollution effects; Spatial variations; Seasonal variations; Biomass; Intertidal environment; Environmental factors; Biomass.
Ano: 2002
URL: http://hdl.handle.net/1834/2955

Vegetación marina de un sector de la plataforma continental de la Guajira (Caribe colombiano)
Provedor de dados: 20
Autores: Diaz-Pulido, G.
A list of 46 species of marine macrophytes (44 algae and 2 seagrasses) collected between 5 to 36 m depth off Riohacha, on the continental shelf of the peninsula La Guajira (Colombian Caribbean) is presented. 22 species of algae were not previously known from this area. A total of 149 apecies are now registered from the area of La Guajira. Three types of macrophyte asociations were found: (1) dominated by the seagrass Thalassia testudinum with a dry leaf biomass between 27 and 40 gm-2 at 5 m depth. (2) established at -17 m and also dominated by T. testudinum, but with a lower dry leaf biomass (14 gm-2) and a more scattered distribution; green rhizophytic macroalgae (Caulerpa spp.) are quite common. (3) dominated by red and green macroalgae with a total dry...
Tipo: Journal Contribution
Palavras-chave: Biomass; Distribution; Algae; Biomass; Distribution; Algae; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_258.
Ano: 2000
URL: http://hdl.handle.net/1834/3313

Estimación de la biomasa de los recursos demersales en el golfo de Guayaquil (junio 2007)
Provedor de dados: 20
Autores: Herrera, M.; Peralta, M.; Coello, D.; Elías, E.; León, J.; Cuadra, T. de la.
Se presentan los resultados obtenidos del crucero T07/06/02 D, realizado a bordo del B/I TOHALLI del Instituto Nacional de Pesca, en el Golfo de Guayaquil del 3 al 21 de junio de 2007; el estudio se complementa con información sobre condiciones físicas, químicas y planctónicas del medio marino. Tanto densidades como biomasas de las principales especies capturadas presentan disminución en sus estimados, lo que reafirma el paulatino decremento reportado en campañas anteriores. La especie chazo y camotillo presentan una distribución un tanto similar, la primera cercana al límite oeste del Golfo, en tanto que la segunda comprendió la parte central del mismo. Las densidades planctónicas obtenidas serían el resultado de condiciones oceanográficas actuales...
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Biomass; Density (population); Biological sampling.
Ano: 2010
URL: http://hdl.handle.net/1834/4797

Towards the development of environmental indices for the Namibian shelf, with particular reference to fisheries management.
Provedor de dados: 20
Autores: Bartholomae, Ch.; Van der Plas, A.
The Namibian Ministry of Fisheries and Marine Resources has the task of collecting and providing relevant oceanographic information for management of their fisheries. However, quality information is difficult to provide because of the complexity of the processes involved in the Namibian marine ecosystem. Nonetheless, there are oceanographic data available that can contribute to fisheries management by improving the general understanding of important oceanographic processes related to fisheries. The focus of this paper is on the development of simple environmental indices that can serve as a measurement or proxy of the state or intensity of certain important oceanographic processes or variables for temporal comparison. These indices relate to oceanographic...
Tipo: Journal Contribution
Palavras-chave: Fisheries management; Marine resources; Oceanographic data; Chlorophylls; Upwelling; Spatial variations; Sardine fisheries; Water temperature; El Nino phenomena; Ecosystems; Fish stocks; Surface temperature; Oxygen; Phytoplankton; Biomass; Seasonal variations; Fronts; Perturbations; Commercial fisheries; Catchability; Remote sensing; Chlorophylls; Dissolved oxygen; Environmental impact.
Ano: 2007
URL: http://hdl.handle.net/1834/4971

Acoustic surveys on the southern blue whiting (Micromesistius australis).
Provedor de dados: 20
Autores: Madirolas, A.
Two joint Argentine-British acoustic surveys specifically targeted on the southern blue whiting (Micromesistius australis) were carried out during September 1994 and 1995. The surveys confirmed the existence of a spawning concentration area located south from San Carlos Strait, in waters south of Malvinas Islands, ASW. The obtained point estimates of blue whiting abundance were 84801 t for the 1994 survey and 140953 t for the 1995 survey. The surveys also provided information on the school structure and behavior as well as some clues about the complex migration pattern of the species.
Tipo: Journal Contribution
Palavras-chave: Fishery surveys; Echo surveys; Biomass; Geographical distribution; Target strength; Biomass; Geographical distribution.
Ano: 1999
URL: http://hdl.handle.net/1834/2567

Seasonal Variatrion of Cymodocea Nodeosa in the Ghar el Melh Lagoon (Tunisia) with reference to insolation, temperature and salinity effects
Provedor de dados: 20
Autores: Sghaier, Y. R.; Zakhama-Sraieb, R.; Charfi-Cheikhrouha, F.
Two sampling stations were selected in order to assess the response of the seagrass to lagoon conditions. Leaf growth was estimated using Zieman method and rhizome production was evaluated by marking rhizome terminals. The vegetative development of C. nodosa inside the lagoon at the limit of its distribution is different from that observed close to the communication channel with the sea. The growth of C. nodosa show a clear unimodal cycle in the two stations reaching maximum leaf development in summer. Shoot density decreased from 915 to 500 shoot m-2 from the communication channel toward the lagoon. The average total biomass varied between 241.6 ± 34 g DW m-2 and 413.8 ± 46 g DW m-2. Leaf plastochrone interval varied seasonally with an annual average of...
Tipo: Journal Contribution
Palavras-chave: Salinity; Biomass; Seagrass; Lagoons; Water temperature; Lagoons; Salinity; Biomass.
Ano: 2012
URL: http://hdl.handle.net/1834/5305

Variabilidad anual del fitoplancton marino en áreas costeras de La Libertad y Manta (Ecuador), su inter-relación con eventos El Niño
Provedor de dados: 20
Autores: Torres, G.
En este artículo se describen los resultados anuales de la biomasa fitoplanctónica cuantitativa (primer nivel trófico), períodos de mayor densidad fitoplanctónica anual en dos estaciones fijas de Manta (1991-1997), La Libertad (1994-1997) y su inter-relación en condiciones frías de 1996 y eventos cálidos El Niño en 1991-92 y 1997.
Tipo: Journal Contribution
Palavras-chave: Variability; Distribution; Biomass; Phytoplankton; El Nino phenomena; Distribution; Biomass; Phytoplankton.
Ano: 1998
URL: http://hdl.handle.net/1834/2328

Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo?
Provedor de dados: 20
Autores: Schiariti, A.
In this Thesis we presented the first steps in the study of the life history and population dynamics of Lychnorhiza lucerna as well as the possibilities of development of its fishery in Argentina. L. lucerna presented a metagenetic life cycle characteristic of most scyphozoans. Polyps reproduced asexually by the production of podocysts and polidisk strobilation. The combination of both types of asexual reproduction resulted in a high strobilation rates indicating that the abundance of medusae would strongly depend on polyps abundance and reproduction. The absence of ephyrae in the Río de la Plata estuary suggest that L. lucerna doest not complete its life cycle locally but medusae would be produced by polyps located northwards along the Uruguayan or...
Tipo: Theses and Dissertations
Palavras-chave: Life cycle; Life history; Population dynamics; Reproductive cycle; Biomass; Estuarine fisheries; Life history; Biomass; Estuarine fisheries; Life cycle; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_12170; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2674; Http://aims.fao.org/aos/agrovoc/c_4317; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2008
URL: http://hdl.handle.net/1834/3109

Estudio de las tramas tróficas asociadas a diferentes densidades de vieira Patagónica Zygochlamys patagonica del Atlántico SO mediante el uso de isótopos estables
Provedor de dados: 20
Autores: Schwartz, M.
Zygochlamys patagonica (King and Broderip, 1832) is an ecosystem engineer mollusk which forms aggregations or banks, of different densities, in the main frontal systems of the SW Atlantic Ocean. The objectives of this work were to analyze the composition, biomass, diversity and species richness of the benthic invertebrate assemblages at different scallop densities as well as the variability of their trophic webs at high and low scallop densities. For this, samples of the benthic invertebrate assemblages were taken at the Shelf Break Front with a non-selective epibenthic dredge. It was evaluated if the abundance (ind/m2) or biomass (colonial species, gr/m2) of the different taxa varied with scallop densities. The results showed that from 14 analyzed, the...
Tipo: Theses and Dissertations
Palavras-chave: Benthos; Ecological associations; Trophic relationships; Food webs; Biomass; Isotopes; Shelf fronts; Zygochlamys patagonica; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4521

Análisis secuencial de la población de polaca (Micromesistius australis) en el período 1987-1997 ajustado con valores de rendimiento por unidad de esfuerzo de pesqueros comerciales.
Provedor de dados: 20
Autores: Wöhler, O.C.; Cordo, H.D.; Hansen, J.E.; Cassia, M.C.
The current status of southern blue whiting Micromesistius australis stock is described. A single, closed fish population is assumed to inhabit the SW Atlantic. Based on catch data corresponding to years 1987-1997, a sequential analysis on the stock is carried out (Cohort Analysis). Under an adaptative framework, catch per unit of effort data from commercial vessels are used to fit the model. Two commercial fleets are used in the fitting, i.e. Polish vessels (1987-1994)and Argentine surimi factory vessels (1991-1997). Results indicate that both, total stock biomass and spawning stock biomass would have declined. Total biomass would have decreased from a maximum close to 1.4 million tons in 1990 down to 0.5 mt in 1997 whereas the current spawning stock...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Fishery management; Catch/effort; Recruitment; Biomass; Demersal fisheries; Demersal fisheries; Stock assessment; Fishery management; Biomass; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2001
URL: http://hdl.handle.net/1834/1867

Programa temporal de evaluación hidroacústica de merluza del sur en aguas interiores de la X y XI Regiones, año 2002. Informe final corregido
Provedor de dados: 20
Autores: Lillo, S.; Céspedes, R.; Barbieri, M.A.; Saavedra, A.; Gálvez, P.
Se presentan los resultados de la evaluación de la biomasa y la distribución espacial de la merluza del sur (Merluccius australis), estructurado por tallas y edad en las aguas interiores de la X y XI Regiones aplicando el método hidroacústico. También se estima la abundancia relativa y la importancia de la fauna acompañante proveniente de los lances de pesca con arrastre a mediagua. Con la información recolectada en el Crucero y en la pesquería se plantea un modelo de dinámica espacio temporal del stock. Los datos fueron colectados en dos cruceros de prospección realizados a bordo del B/C “Abate Molina”, entre el 4 y 18 de febrero (verano) y el desde el 1 al 14 de septiembre del 2003 (invierno). Los resultados mostraron que la merluza del sur era el...
Tipo: Report
Palavras-chave: Population structure; Stock assessment; Age composition; Biomass; Geographical distribution; Body size; Acoustic equipment; Population structure; Stock assessment; Age composition; Biomass; Geographical distribution; Body size; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_35330.
Ano: 2004
URL: http://hdl.handle.net/1834/1696

Análisis y diagnóstico del diseño de muestreo de las campañas de evaluación de merluza (Merluccius hubbsi) al norte y al sur de los 41°S (Zona Comun de Pesca Argentino-Uruguaya y Mar Argentino). Años 1996-1999
Provedor de dados: 20
Autores: Hernandez, D.R.; Bezzi, S.I.; Ibañez, P.M.
Gain contribution by stratification in hake (Merluccius hubbsi) biomass estimation with respect to a simple random sampling based on the same sample size is analyzed. Considering as objective hake biomass assessment, curves which relate precision reached in estimations to the sample size are established. Data were from total hake biomass surveys carried out from 1996 through 1999 hake management units distributed North and South of 41°S Argentine Sea are analyzed separately. Stratification used at present allows to obtain very variable gains in precision associated to biomass with estimations, in the North management unit, with a maximun of 88 in 1996 and no gain in 1997. The South management unit presents also variable results but always with important...
Tipo: Journal Contribution
Palavras-chave: Gadoid fisheries; Fishery surveys; Biomass; Statistical sampling; Stock assessment; Biomass; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251.
Ano: 2003
URL: http://hdl.handle.net/1834/2401

Los recursos de peces demersales de la Plataforma Continental del Ecuador. Parte uno. Distribución, abundancia y variaciones
Provedor de dados: 20
Autores: Herdson, D.; Rodríguez, W.; Martínez, J.
A survey of demersal fish resources of the Continental Shelf of Ecuador was carried out between October 1980 an July 1985 by the National Fisheries Institute of Ecuador, with British Technical Cooperation. This report deals with the stock assessment part of the work. In the course of seven cruises, 366 valid diurnal hauls were made with a high-opening bottom trawl. The demersal fish resources were estimated by swept area methods and the results are presented. The overall average standing stock of demersal fish was 78 000 t of which 22 000 t was good fish, but 36 000 t were gurnards (Triglidae) and 3 000 t of unusable fish. The main stocks were gurnards, grunts and croakers, sharks and corvinas Cynoscion spp. The southern areas especially the Gulf of...
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Geographical distribution; Abundance; Biomass; Demersal fisheries; Geographical distribution; Biomass; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 1985
URL: http://hdl.handle.net/1834/3228

Estudio de la estructura de población del mero (Acanthistius brasilianus, Cuvier   Valenciennes); patrones de distribución, biomasa y rendimiento potencial
Provedor de dados: 20
Autores: Di Bussolo, R.A.; Minotti, P.G.
Tipo: Theses and Dissertations
Palavras-chave: Population structure; Potential yield; Biomass; Size distribution.
Ano: 1980
URL: http://hdl.handle.net/1834/4191

Variaciones de la abundancia numérica y biomasa del zooplancton de red en el Golfo San Jorge (año 1985)
Provedor de dados: 20
Autores: Pérez Seijas, G.M.; Ramirez, F.C.; Viñas, M.D.
A study was made on numercial and biomass variations of the zooplankton of the San Jorge Gulf (Argentina), based on samples from five cruises performed during 1985. The sampling was included within a proagramme for the biology and fishery evaluation of the shrimp Pleoticus muelleri. San Jorge, a large gulf of the northern patagonian shelf, comprises major fishery activities. Some fish species of economical importance depend on copepods for their feeding, like anchovy (Engraulis anchoita)or partially on middle-size plankters, like mackerel (Scomber japonicus). As a way for determining the trophic disponibility at the gulf, a study was made in order to express the numerical abundance of copepods, euphausiids and amphipods and other items of lesser...
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Biomass; Size distribution; Population density; Zooplankton; Biomass; Population density; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 1987
URL: http://hdl.handle.net/1834/2006

Bacterioplancton en Bahía Gaira, Mar caribe (Colombia): comparación de la variabilidad en abundancia y biomasa bacteriana durante diferentes períodos
Provedor de dados: 20
Autores: Barragán-G., R.G.; Canosa, A.; Niño, J.P.
Se estimaron abundancia, biomasa, biovolumen y forma del bacterioplancton en tres estaciones de la bahía de Gaira (costa Caribe colombiana) en los períodos definidos para este estudio como: "lluvioso" (julio, agosto; 2003), "transición" (abril, octubre; 2004) y "seco" (febrero, marzo; 2004). Las meustras del bacterioplancton fueron tomadas a 0.5 y 42 m de profundidad, filtradas sobre filtros de policarbonato de 0.22 μm y cuantificadas utilizando microscopía de epifluorescencia con naranja de acridina y análisis de imagen. La abundancia bacteriana varió entre 1.3 x 105-2.9 x 106 células mL-1 en el período lluvioso, 8.8 x 104-2.2 x 106 células mL-1 en el período de transición y 6.7 x 104-3.9 x 105 células mL-1 en el período seco, la abundancia promedio fue...
Tipo: Journal Contribution
Palavras-chave: Biomass; Seasonality; Biomass; Seasonality; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_34117.
Ano: 2009
URL: http://hdl.handle.net/1834/3594

Influence of different diets on length and biomass production of brine shrimp Artemia franciscana (Kellog, 1906)
Provedor de dados: 20
Autores: García-Ulloa, M.; Gamboa-Delgado, J.; Zabala-Aguirre, J.L.; Ogura-Fujii, T.; Lavens, P.
Total length and biomass production of the brine shrimp Artemia franciscana were studied fed on soybean and wheat micropulverized meals (applied alone or mixed at different proportions), live microalgae (Tetraselmis suecica and Chaetoceros calcitrans), and dried Spirulina as diets. Eight diets were tested in triplicates during 10 days. Significant differences (P &lt; 0.05) were observed from day 1 onwards. The mixed meal-based diets showed better production results. At day 1, the Artemia nauplii fed on the 70% wheat meal/ 30% soya meal diet were 30% longer compared to the animals from the C. calcitrans group. At day 10, the organisms fed with the 100% soya meal diet were 68% longer than those fed on the C. calcitrans diet. The final biomass production (wet...
Tipo: Journal Contribution
Palavras-chave: Length; Biomass; Brine shrimp culture; Length; Biomass; Http://aims.fao.org/aos/agrovoc/c_4260; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 1999
URL: http://hdl.handle.net/1834/3327

Zooplancton en el estuario interior del Golfo de Guayaquil, durante mayo del 2001
Provedor de dados: 20
Autores: Naranjo, Ch.
Los objetivos del estudio son conocer la situación actual del zooplancton con la finalidad de conocer la composición, distribución y abundancia de las comunidades del zooplancton, resaltando las áreas de mayor productividad en el segundo eslabón de la cadena alimentaria. Establecer especies dominantes en la comunidad de quetognatos y su relación con los parámetros físicos en el estuario interior del Golfo de Guayaquil.
Tipo: Journal Contribution
Palavras-chave: Composition; Distribution; Biomass; Zooplankton; Salinity; Abundance; Biological production; Estuaries; Estuarine organisms; Biological production; Estuaries; Distribution; Biomass; Zooplankton; Salinity; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2002
URL: http://hdl.handle.net/1834/2271

Evaluación hidroacústica del stock parental de merluza de tres aletas en su unidad de pesquería, año 2005
Provedor de dados: 20
Autores: Saavedra, A.; Correa, V.; Céspedes, R.; Ojeda, V.; Adasme, L.; Díaz, E.; Oliva, J.; Rojas, P.
El presente estudio tiene como objetivo evaluar el stock de merluza de tres aletas (Micromesistius australis) a través del método hidroacústico, entre las latitudes 47º y 51º S. Como parte del proyecto se realizó entre el 13 y el 22 de agosto de 2005 a bordo del B/F Unzen un crucero de prospección orientado a evaluar mediante un método de evaluación directa (evaluación acústica) su biomasa, abundancia y distribución, estimar la importancia relativa de la fauna acompañante, condiciones reproductivas y tróficas del stock y realizar un análisis de las agregaciones detectadas durante el crucero. Durante el estudio se realizaron 41 lances de pesca de reconocimiento (23 positivos) y 49 transectas acústicas.
Tipo: Report
Palavras-chave: Stock assessment; Echo surveys; Abundance; Biomass; Stock assessment; Biomass; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2006
URL: http://hdl.handle.net/1834/1848

Sobre la dinámica poblacional de la caballa en la pesquería de Mar del Plata. Período 1980-1990
Provedor de dados: 20
Autores: Perrotta, R.G.; Pertierra, J.P.
This species is a principal basic product of the local canned industry. The results show that the biomass and capture were variable for the studied period as a consequence of change in the capturability, and the fishstock is underexploited. Also was estimated the contribution of recruitment, growth and mortality in the total biomass.
Tipo: Journal Contribution
Palavras-chave: Population dynamics; Mathematical models; Biomass; Biomass; Population dynamics; Mathematical models; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6111; Http://aims.fao.org/aos/agrovoc/c_24199.
Ano: 1993
URL: http://hdl.handle.net/1834/2571

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

Evaluación hidroacústica del recurso jurel entre la V y X Regiones, verano, año 2006
Provedor de dados: 20
Autores: Córdova, J.; Hernández, C.; Correa, V.; Núñez, S.; Navarro, E.; Reyes, M.; Torres, P.; Ortiz, J.; Saavedra, J.; Catasti, V.; Valenzuela, V.; Bocic, V.; Hernández, C.
El presente informe contiene los resultados de la cuantificación de la biomasa por hidroacústica, distribución espacial  e indicadores biológicos del jurel y las condiciones ambientales asociadas al recurso durante el verano del 2006. El crucero de investigación se realizó durante el 6 y el 31 de marzo del año 2006, en el área entre el norte de Valparaíso (32º 55’ S) y Isla Chiloé (41º 40’ S), desde las 5 a 200 mn. Este estudio se llevó a cabo con tres embarcaciones: el B/C Abate Molina operado por el Instituto de Fomento Pesquero (IFOP), y los PAM Ventisquero y Lider, operados por la Pesquera San José S.A. De manera complementaria, se realizó una ecoprospección desde 200 a 400 mn para conocer la distribución espacial del recurso en ese sector.
Tipo: Report
Palavras-chave: Biomass; Echo surveys; Geographical distribution; Biological data; Biomass; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2007
URL: http://hdl.handle.net/1834/1855

Composición, distribución y abundancia del plancton en el estuario de San Lorenzo, Esmeraldas - Ecuador
Provedor de dados: 20
Autores: Naranjo, Ch.; Tapia, M.E.
El presente trabajo es una contribución al estudio del plancton estuarino presente en el área comprendida del Canal de San Lorenzo, provincia de Esmeraldas, para lo cual existe poca información sobre este tema.
Tipo: Journal Contribution
Palavras-chave: Distribution; Composition; Abundance; Plankton; Phytoplankton; Zooplankton; Ichthyoplankton; Diatoms; Biomass; Distribution; Plankton; Phytoplankton; Zooplankton; Biomass; Diatoms; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_32657.
Ano: 2002
URL: http://hdl.handle.net/1834/2277

Análisis secuencial de la población de merluza de cola (Macruronus magellanicus)en el atlantico sudoccidental período 1985-1995.
Provedor de dados: 20
Autores: Wöhler, O.C.; Giussi, A.R.; Hansen, J.E.
Sequential population analysis on Long Tail Hake (Macruronus magellanicus)from the Southwest Atlantic. Years 1985-1995. VPA on the Long Tail Hake (Macruronus magellanicus), based on data covering the years 1985 up to 1995, was performed to assess the current state of the stock. Simulation trials, inducing uncertainty about both the natural mortality rate and recruitment were also accomplished, to evaluate the risk of overfishing which is associated to different fishing alternatives, always under the assumption of a single and closed Long Tail Hake population. CPUE data were not appropriate for tunning, so the traditional VPA has been applied. During the period of study, stock biomass and spawning stock biomass showed an increased trend. Long and short-term...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Fishery management; Catch/effort; Fishing mortality; Overfishing; Biomass; Sexual maturity; Stock assessment; Fishery management; Biomass; Overfishing; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_34068; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 1999
URL: http://hdl.handle.net/1834/1875

Evaluación de la pescadilla de red (Cynoscion striatus) en la Zona Común de Pesca argentino-uruguaya, en el otoño de 1989
Provedor de dados: 20
Autores: Cioffi, C.A.
Tipo: Theses and Dissertations
Palavras-chave: Population structure; Biomass; Size distribution; Age; Fishery surveys; Population structure; Biomass; Age; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 1992
URL: http://hdl.handle.net/1834/3554

Evaluación del stock desovante de anchoveta y sardina común entre la V y X Regiones, año 2003. Informe final corregido
Provedor de dados: 20
Autores: Bernal, C.; Canales, M.; Catasti, V.; Sepúlveda, A.; Ruíz, P.; Alarcón, R.; Núñez, S.; Oyarzún, C.; Gazitúa, S.; Claramunt, G.; Herrera, G.
Se evalúan los stocks desovantes de anchoveta y sardina común mediante la aplicación del método de la producción diaria de huevos, durante la época de máxima actividad reproductiva del año 2003. Se diseñó un crucero de recolección de huevos y se efectuaron capturas de adultos de ambas especies entre la V (33°10’S) y X (41°20’S) Regiones. En la región costera entre la VIII y X Regiones, la condición reproductiva fue monitoreada a través de indicadores macroscópicos (IGS y estados de madurez sexual), indicando que ambas especies habrían iniciado su actividad reproductiva a partir de julio de 2003, con un máximo de actividad observado en septiembre para ambas especies. Desde la flota artesanal con puerto base en Calbuco, se obtuvieron hembras de sardina común...
Tipo: Report
Palavras-chave: Stock assessment; Clupeoid fisheries; Fish eggs; Biomass; Spawning; Spawning populations; Stock assessment; Biomass; Spawning; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_14490.
Ano: 2004
URL: http://hdl.handle.net/1834/1695

Patrones de distribución espacio-temporal de los estadíos embrionarios y larvales de la anchoíta (Engraulis anchoita Hubbs &amp; Marini) a micro y macro-escala. Su relación con la supervivencia
Provedor de dados: 20
Autores: Sánchez, R.P.
This dissertation is focused on the study of implications of spatial patterns on survival of eggs and larvae and subsequent recruitment of the SW Atlantic anchovy, Engraulis anchoita. The study of distribution patterns is encompassed within the conceptual framework of the analysis of reproductive strategies of marine bony fish, as adaptations that enable them to cope with and actively exploit environmental variability, regulating their abundance and avoiding extinction. The SW Atlantic anchovy, is ideally suitable for studies on reproductive biology and recruitment on a comparative basis. Its spawning and nursery grounds are located in very diverse ecosystems. This variety refers to their physico-chemical properties, carrying capacity, the influence of...
Tipo: Theses and Dissertations
Palavras-chave: Fish eggs; Fish larvae; Recruitment; Ichthyoplankton; Biomass; Reproduction; Developmental stages; Mortality; Stock assessment; Environmental conditions; Biomass; Developmental stages; Stock assessment; Fish larvae; Reproduction; Mortality; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2230; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1995
URL: http://hdl.handle.net/1834/1491

La zona común de pesca argentino-uruguaya y el problema de la cuota de captura de merluza (Merluccius hubbsi)
Provedor de dados: 20
Autores: Bezzi, S.I.; Aubone, A.; Irusta, G.
The Argentine-Uruguayan Common Fishing Zone and the problem of the hake catch quota allocation. The aim of this paper is to present the problem of the catch quota in the shared zone and the proposals related to the maximum catch from 1976 to 1998. The state of the population which inhabits the Common Fishing Zone and north of 41°S is diagnosed, concluding that the total biomass has declined in this period and the spawning stock biomass is under the allowable biological catches. In addition, the catch per unit effort (CPUE)of the commercial fleet has a declining tendency and the total effort is duplicated. Biological population characteristics are presented: reproduction, feeding, nursery grounds and closed areas to protect juveniles. Proportional...
Tipo: Journal Contribution
Palavras-chave: Catch/effort; Biomass; Quota regulations; Depleted stocks; Fishing grounds; Shared stocks; Biomass; Fishing grounds; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2947.
Ano: 1999
URL: http://hdl.handle.net/1834/1876

Etude des variations de la biomasse du thiof (&lt;Epinephelus aeneus&gt;) sur les côtes de Mauritanie. Influence de facteurs hydrodynamiques et climatiques
Provedor de dados: 20
Autores: Ould Telmidi, M.
Mémoire de DEA (Spécialité Océanographie et Environnements marins)
Tipo: Theses and Dissertations
Palavras-chave: Biomass; Condition factor; Distribution; Environmental factors; Seasonal variations; Upwelling; Biomass; Distribution; Environmental factors; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_2594.
Ano: 2005
URL: http://hdl.handle.net/1834/1223

Zooplankton biomass in the reproductive area of the southern blue whiting (Micromesistius australis).
Provedor de dados: 20
Autores: Sabatini, M.; Alvarez Colombo, G.L.; Ramirez, F.C.
Total and size-fractioned zooplankton biomass (larger and smaller than 5 mm) were analyzed over two cruises conducted in the late austral winter (September 1994 and 1995) in the area surrounding Malvinas Islands at the time that massive spawning of southern blue whiting was expected to take place. Biomass was rather uniformly distributed in the area and dominated by the fraction larger than 5 mm in which euphausiids and secondarily chaetognaths were dominating in terms of both weight and number. The smaller fraction was mostly made up of copepods. From the high occurrence of euphausiids and seasonal abundance of the several species of copepods normally present within the area it was hypothesised that the feeding requirements of juvenile and adult blue...
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Abundance; Size distribution; Biomass; Spawning seasons; Zooplankton; Biomass; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 1999
URL: http://hdl.handle.net/1834/2568

Composición y variación estacional del fitoplancton, zooplancton y microbentos en el estuario interior del Golfo de Guayaquil, durante el año 2003
Provedor de dados: 20
Autores: Gualancañay, E.; Tapia, M.E.; Naranjo, Ch.
El presente trabajo comprende el estudio de la distribution cualitativa y cuantitativa del fitoplancton en el Golfo de Guayaquil, durante dos épocas: Húmeda y seca. El propósito del presente trabajo con respecto al zooplankton está orientado a conocer los cambios en la composición, abundancia y diversidad del zooplancton y en particular el Phyllum Chaetognatha con el objetivo de relacionar la distribución de las especies de Quetognatos con los parámetros físicos. En lo relacionado al estudio del microbentos, se pretende estudiar la composición específica y la abundancia relativa de las especies de la microflora béntica y de la microfauna bentónica y su relación con factores ambientales.
Tipo: Journal Contribution
Palavras-chave: Community composition; Seasonal variations; Phytoplankton; Diatoms; Biomass; Zooplankton; Microorganisms; Benthos; Geographical distribution; Estuaries; Phytoplankton; Biomass; Zooplankton; Benthos; Geographical distribution; Estuaries; Diatoms; Microorganisms; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_32657; Http://aims.fao.org/aos/agrovoc/c_4807.
Ano: 2004
URL: http://hdl.handle.net/1834/2283

Evaluación de la merluza (Merluccius hubbsi) en julio y agosto de 1994, entre 34º y 36ºS del Atlántico sudoccidental.
Provedor de dados: 20
Autores: Villarino, M.F.; Simonazzi, M.A.; Bambill, G.A.; Ibañez, P.M.; Castrucci, R.; Reta, R.
This report contains the objectives, data collected and results from a hake assessment survey carried out in the Argentine Sea between 34° and 46° S, during July and August 1994, on board of the R/Vs "Dr. E. L. Holmberg" and "Cap. Oca Balda". The main objectives of the survey were: 1) to estimate total biomass and total abundance per age class; 2) to study the size and age composition; 3) to define the maturity ogive per size and age; 4) to quantitatively determine cannibalism and predation indexes. The area covered by the survey where 149 trawls and 184 oceanographic stations were performed was close to 100,440 nm2 . Hake biomass between 34° and 46° S was estimated in 1,105,284 tons and the confidence interval at 95.  was ± 23.12. . Most of the biomass...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Abundance; Biomass; Fishery surveys; Population structure; Stock assessment; Biomass; Population structure; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115.
Ano: 2000
URL: http://hdl.handle.net/1834/2591

Reclutamiento del camarón rosado Farfantepenaeus notialis (Decapoda: Penaeidae) en el golfo de Ana María, Cuba.
Provedor de dados: 20
Autores: Giménez Hurtado, E.; Alzugaray Martínez, R.; Garcés Rodríguez, Y.; Delgado Miranda, G.; Ventura Flores, A.
Se determinó  la biomasa del camarón rosado Farfantepenaeus notialis presente en el golfo de  Ana María durante el periodo 1997-2010 mediante análisis estadístico de captura por edades  (SCA). Esta    se incrementó  a partir del  año 2008 como respuesta al aumento del   reclutamiento, cuyo promedio anual  presenta sus mayores valores  en julio, noviembre y  marzo. La entrada de reclutas (pre-adultos) al área de pesca ocurre por dos zonas principales,  frente a los cayos de Ana María, y en Sta. Cruz Abajo, al norte de la porción sur de los cayos de  las Doce Leguas. Una pesquería  a finales del año puede provocar una  sobrepesca del  crecimiento y afectar la biomasa disponible para el siguiente año.
Tipo: Journal Contribution
Palavras-chave: Biomass; Recruitment; Shrimp fisheries.
Ano: 2012
URL: http://hdl.handle.net/1834/4382

Distribución latitudinal del fitoplancton entre Islas Cocos - Galápagos, Noviembre-Diciembre 2001
Provedor de dados: 20
Autores: Torres, G.
El propósito de esta investigación fue realizar una evaluación de la distribución de las especies del fitoplancton (red 55u), durante noviembre-diciembre-2001, en una región latitudinal que implica dos áreas insulares del Pacífico Tropical Islas Cocos e Islas Galápagos, estudios que serán de gran contribución científica para el conocimiento de estas especies en la región del mar ecuatoriano.
Tipo: Journal Contribution
Palavras-chave: Geographical distribution; Phytoplankton; Biomass; Species diversity; Cruises; Oceanic islands; Geographical distribution; Phytoplankton; Biomass; Species diversity; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2002
URL: http://hdl.handle.net/1834/2276

Evaluación hidroacústica del stock parental de merluza de tres aletas en su unidad de pesquería, año 2003. Informe final corregido
Provedor de dados: 20
Autores: Lillo, S.; Céspedes, R.; Díaz, E.; Ojeda, V.
El presente estudio tiene como objetivo evaluar el stock de merluza de tres aletas (Micromesistius australis) a través del método hidroacústico, entre las latitudes 47º y 51º Sur. Como parte del proyecto, se realizó entre el 2 y el 15 de agosto del 2003 a bordo del B/C “Abate Molina” un crucero de prospección dirigido a evaluar mediante un método de evaluación directa (evaluación acústica) su biomasa, abundancia y distribución, estimar la importancia relativa de la fauna acompañante, condiciones reproductivas y tróficas del stock. Durante el estudio se realizaron 13 lances de pesca y 49 transectas acústicas. Los resultados muestran que la merluza de tres aletas se distribuyó asociada al borde de la plataforma y talud continental, con una biomasa estimada...
Tipo: Report
Palavras-chave: Stock assessment; Biomass; Population structure; Age composition; Geographical distribution; Acoustic equipment; Stock assessment; Biomass; Population structure; Age composition; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2004
URL: http://hdl.handle.net/1834/1698

Estimación cualitativa y cuantitativa del macrozoobentos en la macrolaguna del Golfo de Batabanó, Cuba
Provedor de dados: 20
Autores: Hidalgo Rodríguez, G.; Areces Mallea, A.
The Gulf of Batabano is an important region of the Cuban shelf, which environmental conditions are aim of several ecological assessments. In order to contribute to the characterization of their benthic communities, the structure of the macrofauna in sediments of this shallow-water ecosystem was determined. Higher diversity and abundance of macrofauna were registered in sandy and mixed with vegetation substrates, mainly dominated by polychaetes and crustaceans. Biomasses did not show a particular distributional pattern. The observed increases of densities and biomasses in November could be associated to a regular seasonal variation.
Tipo: Journal Contribution
Palavras-chave: Density; Biomass; Biomass; Density; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2186.
Ano: 2009
URL: http://hdl.handle.net/1834/3450

Variación estacional del fitoplancton en una estación fija en el estero del Muerto durante 1999-2000-2001
Provedor de dados: 20
Autores: Tapia, M.E.
El objetivo del presente estudio es conocer la variación estacional de las especies del fitoplancton y su relación con las condiciones ambientales durante el período en estudio.
Tipo: Journal Contribution
Palavras-chave: Seasonal variations; Phytoplankton; Chlorophylls; Diatoms; Environmental conditions; Cell counters; Estuaries; Fixed stations; Marshes; Biomass; Phytoplankton; Estuaries; Biomass; Chlorophylls; Diatoms; Environmental conditions; Marshes; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_32657; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_4631.
Ano: 2006
URL: http://hdl.handle.net/1834/2310

Procesos planctónicos en el Golfo de Guayaquil (Campo Amistad) julio-agosto/2001
Provedor de dados: 20
Autores: Torres Ch., G.; Calderón, T.; Mero, M.; Franco, V.
El presente trabajo es una contribución al estudio del fitoplancton y zooplancton marino-estuarino y su relación con las condiciones ambientales físico-químicas presentes en el entorno de la plataforma Amistad de producción de gas (Campo Amistad - Golfo de Guayaquil Externo), realizada por el Instituto Oceanográfico de la Armada en el B/I ORION durante julio-agosto del 2001.
Tipo: Journal Contribution
Palavras-chave: Biomass; Chlorophylls; Nutrients (mineral); Zooplankton; Phytoplankton; Environmental assessment; Production platforms; Biomass; Zooplankton; Phytoplankton; Chlorophylls; Environmental assessment; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_37751.
Ano: 2004
URL: http://hdl.handle.net/1834/2285

Distribución de la densidad fitoplanctónica en una estación fija costera. La Libertad (Ecuador), durante 1989-1993
Provedor de dados: 20
Autores: Torres, G.
El presente trabajo pretende dar a conocer los resultados de la distribución estacional cuantitativa del fitoplancton (diatomeas y dinoflagelados), y su relación con masas de agua, dadas por temperatura y salinidad, desde 1989 hasta 1993 en una estación fija costera La Libertad, período en el cual se presentó un evento "El Niño" 1991-1992.
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Seasonal distribution; Water temperature; Oceanographic stations; Fixed stations; Biomass; Population density; Biomass; Phytoplankton; Water temperature; Population density; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_16063; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 1996
URL: http://hdl.handle.net/1834/2198

Evaluación directa del langostino colorado y langostino amarillo entre la II y VIII Regiones, año 2003
Provedor de dados: 20
Autores: Leiva, B.; Canales, C.; Barbieri, M.A.; Cortez, J.; Quiroz, J.C.; Arana, P.; Guerrero, A.; Ahumada, M.; Melo, T.; Queirolo, D.; Hurtado, C.; Gálvez, P.; Molina, E.
El Proyecto FIP 2003-31 contempló cruceros de prospección los cuales fueron desarrollados en el período comprendido entre el 17 de agosto y el 27 de septiembre de 2003 y cuyo fin estuvo dirigido a la estimación, mediante evaluación directa, del nivel de biomasa y abundancia del langostino colorado (Pleuroncodes monodon) y langostino amarillo (Cervimunida johni) entre las Regiones II y VIII
Tipo: Report
Palavras-chave: Stock assessment; Crustacean fisheries; Biomass; Abundance; Stock assessment; Biomass; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2004
URL: http://hdl.handle.net/1834/1733

Caracterización biológica de la bahía de Jaramijó en la costa Ecuatoriana
Provedor de dados: 20
Autores: Gualancañay, E.; Tapia, M.E.; Naranjo, Ch.; Cruz, M.; Villamar, F.
Para el estudio biológico y ambiental de la bahía de Jaramijó en los componentes fitoplancton, zooplancton, microbentos y macrobentos, se analizaron 15 estaciones provenientes de tres niveles entre 10 y 20 metros de profundidad y dividido en tres perfiles paralelos a la costa, durante las estaciones seca y lluviosa del año 2008. El fitoplancton y zooplancton resultaron muy abundantes durante la estaciòn lluviosa y menos abundante en la estación seca del año 2008. Predominaron las especies de diatomeas: Bacteriastrum hyalinum, Leptocylindrus danicus, Rhizósolenia stolterfothii, Chaetoceros affinis y Ch. curvisetus y la presencia de dinoflagelados y cianobacterias fue escasa dinoflagelados. En general las especies halladas son típicas de una mezcla de masas...
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Zooplankton; Biogeography; Biomass; Marine molluscs.
Ano: 2010
URL: http://hdl.handle.net/1834/4212

Evaluación de recursos pelágicos pequeños al este de las Islas Galápagos durante abril de 1995
Provedor de dados: 20
Autores: Vicuña, H.; Chalén, X.
The document presents results from the pelagic acoustic research survey, executed at the East zone of the Galápagos Islands, between April and May 1995. A total of ca., 15 500 km² was covered. The following species were identified in the catch: mackarel (Scomber japonicus), south sardine (Sardinops sagax), mictophids (Lampanyctus spp.), and small specimens of giant squid (Dosidicus gigas). Mean legth and weight for mackarel and south sardine were 26,3 cm FL/0,251 kg and 18,6 cm TL/0,051 kg respectively. The estimated density for small pelagic fish of comercial interest (mackarel and sardine) was of 10,5 km². The estimated biomass for mackarel was ca., 125 000 t whereas for sardine was ca., 36 000 t. The current results coincide with those of March-April...
Tipo: Journal Contribution
Palavras-chave: Pelagic fisheries; Length-weight relationships; Biomass; Stock assessment; Echo surveys; Biomass; Stock assessment; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 1995
URL: http://hdl.handle.net/1834/3022

Variación interanual del mesozooplancton en la plataforma bonaerense en primavera: introducción de nuevas metodologías para su análisis
Provedor de dados: 20
Autores: Di Mauro, R.
The distribution and abundance of mesozooplankton (specially copepod, cladoceran and appendicularian species) of the Buenos Aires shelf obtained in spring, during the years 2002, 2003 and 2004, were analysed. A small bongo net provided with 67 and 220 µm meshes, was employed in order to obtain a complete representation of the size spectrum of the mesozooplankton. The analysis included both the traditional optical method and the a new automatic image analysis (ZooImage). The results were related with the oceanographic conditions, which were, in general similar to the mean conditions for the study area. The finer mesh (67 µm) allowed a more accurate estimation of the abundance and biomass of small copepod species ( 1mm total length), producing the tick mesh...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Abundance; Biomass; Annual variations; Fish larvae; Imaging techniques; Oceanographic data; Environmental conditions; Salinity; Temperature; Water masses.
Ano: 2011
URL: http://hdl.handle.net/1834/4204

Distribución de clorofila "a" y feopigmentos en el Estrecho Bransfield, Bahía Chile y Paso Drake durante el verano de 1998 (Antártica)
Provedor de dados: 20
Autores: Torres Ch., G.
Se estima la productividad primaria en concentración de clorofila "a" y feopigmentos, como indicativo de la calidad del primer nivel trófico-fitoplancton, registradas en el Estrecho Bransfield, Bahía Chile (Noreste de la Isla Greenwich) y en el Pacífico Drake, durante la VII Expedición Ecuatoriana a la Antártida a bordo del B/I ORION durante el verano austral de 1998. La biomasa fitoplanctónica superficial de clorofila "a" en el Estrecho Bransfield, registró las mayores concentraciones (0.7-08 mg/m3) hacia el noreste del estrecho, y las menores concentraciones de 0.2 mg/m3 se localizaron hacia el centro. A nivel subsuperficial de los 20 m se registraron las más altas concentraciones de toda la columna de agua (0-100 m), con una distribución latitudinal...
Tipo: Journal Contribution
Palavras-chave: Chlorophylls; Biomass; Phytoplankton; Biological production; Pigments; Polar zones; Biomass; Phytoplankton; Biological production; Pigments; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_5875; Http://aims.fao.org/aos/agrovoc/c_1577.
Ano: 1998
URL: http://hdl.handle.net/1834/3840

Distribución de Clorofila-a frente a la costa ecuatoriana durante septiembre y diciembre de 1990
Provedor de dados: 20
Autores: Espinoza, J.; Maridueña, A.M.
Este trabajo describe la distribución tanto superficial como vertical de clorofila-a (Cl-a) durante los meses de septiembre y diciembre de 1990 y se discute la influencia de las condiciones oceanográficas sobre este pigmento fotosintético, como por ejemplo la presencia de una termoclima poco profunda, la posición del Frente Ecuatorial, así como la influencia de la escasez de precipitaciones pluviales sobre el estuario exterior del Golfo de Guayaquil. Todos estos factores favorecieron la presencia de valores estacionales relativamente altos de Cl-a exceptuando los valores bajos de la misma encontrados en el estuario exterior del Golfo de Guayaquil.
Tipo: Journal Contribution
Palavras-chave: Chlorophylls; Primary production; Biomass; Horizontal distribution; Vertical distribution; Primary production; Biomass; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_1577.
Ano: 1991
URL: http://hdl.handle.net/1834/3107

Variación espacial y temporal de las  asociaciones de algas en zonas del sublitoral  norte habanero, Cuba
Provedor de dados: 20
Autores: Valdivia Acosta, A.
Se investiga  la variación espacial y estacional de la composición por especies,  cubrimiento y biomasa de las asociaciones de algas.  Dos sitios contaminados  correspondientes a las zonas adyacentes a la desembocadura de la Bahía de La  Habana y el río Almendares  fueron analizados  y se comparan con dos sitios de  referencia en Miramar. En cada sitio se estudian los biotopos de plano rocoso y veril  inferior. Los muestreos se realizaron en los meses de febrero, mayo y agosto del año  2002. La composición por especies  fue analizada mediante frecuencias de aparición.  La cobertura vegetal se estima mediante censo visual utilizando un cuadrante de  0.0625 m2 . Se definen ocho categorías de cubrimiento: seis grupos morfofuncionales,  césped de algas y...
Tipo: Theses and Dissertations
Palavras-chave: Variations (space); Algae culture; Biomass.
Ano: 2004
URL: http://hdl.handle.net/1834/5552

Evaluación hidroacústica de jurel en la región oceánica, de la I y II Regiones
Provedor de dados: 20
Autores: Córdova, J.; Correa, V.; Hernández, C.; Letelier, J.; Reyes, H.; Ramirez, N.; Catasti, V.; Valenzuela, V.; Bocic, V.
El presente informe contiene los resultados de la cuantificación de la biomasa por hidroacústica del jurel en la zona norte, la distribución e indicadores biológicos del jurel, las condiciones ambientales y las relaciones entre éstas y la distribución del recurso. El crucero de investigación se realizó entre el 2 de noviembre y el 5 de diciembre del año 2006. La prospección abarcó el área desde Arica (18º 20’ S) a Antofagasta (23º 50’ S), desde las 5 a 200 mn. Este estudio se llevó a cabo con el B/C Abate Molina operado por el Instituto de Fomento Pesquero (IFOP) y de propiedad de Subsecretaría de Pesca.
Tipo: Report
Palavras-chave: Stock assessment; Biomass; Echo surveys; Environmental conditions; Geographical distribution; Stock assessment; Biomass; Geographical distribution; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2007
URL: http://hdl.handle.net/1834/1851

Evaluación hidroacústica del stock parental de merluza de tres aletas en su unidad de pesquería, año 2004. FASE I y FASE II
Provedor de dados: 20
Autores: Lillo, S.; Céspedes, R.; Ojeda, V.; Saavedra, A.; Díaz, E.; Adasme, L.
El presente estudio tiene como objetivo evaluar el stock de merluza de tres aletas (Micromesistius australis) a través del método hidroacústico, entre las latitudes 47° 00' S y 51° 00' S. Como parte del proyecto, se realizó entre el 2 y el 14 de septiembre de 2004 un crucero de prospección a bordo del B/C Abate Molina, orientado a evaluar mediante un método de evaluación directa (evaluación acústica) su biomasa, abundancia y distribución, junto con estimar la composición de tallas, edad y proporción sexual del stock desovante en el área de estudio.
Tipo: Report
Palavras-chave: Stock assessment; Spawning populations; Echo surveys; Biomass; Geographical distribution; Sex ratio; Age groups; Body size; Stock assessment; Biomass; Geographical distribution; Body size; Sex ratio; Age groups; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_35330; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_28628.
Ano: 2005
URL: http://hdl.handle.net/1834/1740

Distribución, evaluación acustica y estructura poblacional de la anchoíta. Resultados de las campañas del año 1993
Provedor de dados: 20
Autores: Hansen, J.E.; Madirolas, A.
Two pelagic surveys to study were carried out during 1993. Those surveys covered the regions inhabited by either the bonaerensis stock in october (34-41°S)and the patagonian stock in November - December (41-45°30'S). Pre-stratified random sampling designs, including two random steps to allocate the transects, were adopted to perform the acoustic sampling by echo integration. A midwater trawl net (9-16 m vertical opening, 10 mm mesh-sized codend)was used to collect fish samples. The biomass of the northern stock was acoustically estimated to be about 1,45 million tons, whereas that of the southern stock was almost 740,000 t. Young anchovies, up to two-year old, allow for most of theose abundance values within each stock. The arrays of individuals at the sea...
Tipo: Journal Contribution
Palavras-chave: Pelagic fisheries; Geographical distribution; Biomass; Mortality; Echo surveys; Stock assessment; Geographical distribution; Biomass; Stock assessment; Pelagic fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1996
URL: http://hdl.handle.net/1834/1955

Evaluación de polaca (Micromesistius australis) en el Atlántico Sudoccidental. Período 1987-2001
Provedor de dados: 20
Autores: Wöhler, O.C.; Hansen, J.E.; Cassia, M.C.; Cordo, H.D.
Period 1987-2001. A diagnosis of the current state of Southern blue whiting (Micromesistius australis) stock in the Southwest Atlantic was carried out on the basis of catches corresponding to the period 1987-2001 as reported by the Argentine fleet and also by vessels operating around Malvinas Islands. Abundance and current fishing mortality rates were estimated, and the biomass evolution in the long term resulting from some possible exploitation strategies based on different management strategies were projected. A sequential population analysis calibrated under a conceptual adjustable framework with five independent abundance indices was carried out. The effects on the biomass estimates were analysed by adopting different selection patterns and calibration...
Tipo: Journal Contribution
Palavras-chave: Fishery management; Biomass; Demersal fisheries; Stock assessment; Biomass; Fishery management; Demersal fisheries; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_24251.
Ano: 2007
URL: http://hdl.handle.net/1834/2526

Comunidades del plancton en la Caleta Aeolian de la Isla Baltra - Galápagos (Ecuador), durante 2005
Provedor de dados: 20
Autores: Naranjo, Ch.; Tapia, M.E.
El propósito del trabajo es determinar la composición, abundancia de los grupos dominantes del fitoplancton y zooplancton, establecer las especies de Quetognatos y su relación con la temperatura superficial del mar durante marzo de 2005 correspondiente a la época húmeda.
Tipo: Journal Contribution
Palavras-chave: Plankton; Primary production; Biological production; Phytoplankton; Zooplankton; Biomass; Abundance; Community composition; Fish eggs; Surface temperature; Plankton; Primary production; Biological production; Phytoplankton; Zooplankton; Biomass; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2007
URL: http://hdl.handle.net/1834/2346

Biomasa y distribución espacial del bacterioplancton en el sector norte de la plataforma continental argentina (34º S-41º S)
Provedor de dados: 20
Autores: Hozbor, M.C.; Hernández, D.R.; Cucchi Colleoni, A.D.; Costagliola, M.C.; Peressutti, S.R.
The northern sector of the Argentine continental shelf (34º S-41º S) is a highly productive area that sustains important fishery resources like Argentine anchovy (Engraulis anchoita) and is characterized by the presence of frontal zones with retention of detritus and plankton. In marine environments the bacterioplankton represents one of the main components of the trophic nets and plays a key role in biogeochemical cycles. In this ecosystem biomass and bacterioplankton distribution as well as their relation to environmental variables were analyzed. The highest chlorophyll a values, not significantly related to bacterioplankton (p &gt; 0.05), were found in frontal and coastal areas. Abundance, bacterial biomass and cell volume values ranged 0.48-5.42 x 106...
Tipo: Journal Contribution
Palavras-chave: Picoplankton; Bacteria; Biomass; Fronts; Coastal zone; Abundance; Environmental factors; Geographical distribution.
Ano: 2013
URL: http://hdl.handle.net/1834/5498

Evaluación hidroacústica del recurso jurel entre la V y X Regiones, invierno, año 2004
Provedor de dados: 20
Autores: Córdova, J.; Barbieri, M.A.; Espejo, M.; Núñez, S.; Ortiz, J.; Torres, P.; Véjar, F.; Catasti, V.; Valenzuela, V.
El presente informe contiene los resultados de la cuantificación de biomasa por hidroacústica del jurel (Trachurus murphyi) en la zona centro-sur, la distribución e indicadores biológicos del jurel, las condiciones ambientales, y las relaciones entre éstas y la distribución del recurso. El crucero de investigación se realizó entre el 29 de mayo al 23 de junio del año 2003.
Tipo: Report
Palavras-chave: Stock assessment; Biomass; Echo surveys; Geographical distribution; Environmental conditions; Fishery resources; Pelagic fisheries; Stock assessment; Biomass; Geographical distribution; Environmental conditions; Fishery resources; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2005
URL: http://hdl.handle.net/1834/1734

Fitoplancton en el afloramiento de las Islas Galápagos, durante Agosto 2000
Provedor de dados: 20
Autores: Torres, G.; Tapia, M.E.
Esta investigación es parte del Proyecto Indicadores Biológicos de diferentes ecosistemas marinos del Ecuador, correspondiente a la región Insular de Galápagos durante agosto 2000, con el propósito de comprender la dinámica poblacional del fitoplancton (cuali-cuantitativo) de las diferentes masas de agua que afloran al este y oeste de Galápagos y entre las islas enfocando áreas de mayor fertilidad marina en la época seca.
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Chlorophylls; Biomass; Upwelling; Marine ecology; Water masses; Population dynamics; Cruises; Oceanic islands; Phytoplankton; Biomass; Chlorophylls; Marine ecology; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_4609; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2002
URL: http://hdl.handle.net/1834/2296

Distribución estacional y estructura poblacional del bacalao austral (Pisces, Moridae, Salilota australis) en la zona económica exclusiva argentina entre los 45°S y 56°S durante 1992 y 1993
Provedor de dados: 20
Autores: Cassia, M.C.; Hansen, J.E.
The Patagonian cod (Salilota australis) inhabits the SW Atlantic from 38°S up to 55°S, as well as the Pacific Ocean from 40°S up to 57°S. The annual catches of this species by both the Argentine fleet and those operating around the Malvinas Islands have significantly increased during the decade 1990-2000, peaking to 16,556 t in 1996. After this, a marked decrease in landings was noticed, and during 2003 the catch was 7,924 t. Seasonal distribution, concentration grounds, and population structure of the Patagonian cod from the Argentine Sea are described, and the mean densities of the species are seasonally related to latitude, temperature and depth, on the basis of data from surveys carried out by the INIDEP research vessels in 1992 and 1993. Highest mean...
Tipo: Journal Contribution
Palavras-chave: Gadoid fisheries; Seasonal distribution; Population density; Population structure; Biomass; Population structure; Biomass; Population density; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 2005
URL: http://hdl.handle.net/1834/1561

Aplicación de un modelo dinámico de biomasa para evaluar el efectivo sur de merluza. Período 1986-1998
Provedor de dados: 20
Autores: Irusta, G.; Hernandez, D.R.
The status of hake (Merluccius hubbsi) resource south of 41°S in the Argentine Sea was evaluated with the Biomass Dynamic Model of Pella and Tomlinson. Results indicate that the population was overexploited and in a low biological production level (B99 BMSY1 because, as of 1998, catches always exceeded the surplus production corresponding to each year and the (MSY) Maximum Sustainable Yield. In 1993 increase of landings accelerated declination of biomass. For 1999 the MSY was estimated at 244,773 t and the replacement catch at 147,389 t. Landings corresponding to 1998 surpassed the MSY in 145,000 t and the replacement catch in 242,611 t.
Tipo: Journal Contribution
Palavras-chave: Gadoid fisheries; Stock assessment; Overfishing; Biomass; Yield; Stock assessment; Biomass; Overfishing; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_34068.
Ano: 2003
URL: http://hdl.handle.net/1834/2425

Distribución y abundancia de los recursos demersales en la plataforma continental del Ecuador durante junio de 1995
Provedor de dados: 20
Autores: Revelo, W.
The demersal phase (from june 24th to 09th, 1995) of cruise T95/06/02 DO, covered an area of 23833,6 km2 between 01° 04'1”N - 79° 59'6”O and 03° 22'7”S - 80° 48'0”O, of the Ecuadorian Continental Plataform, the deph range from 13 to 111 meters. 161 species were recorded, divided into 106 oseum fish species, five sharks, nine ray, 37 crustaceans, three molluscan and one holothurid (sea cucumber). Total biomass was estimated as 91685, 5 t, with 68,72% of this biomass distributed between 02° 15'1”S - 03°22'7”S, opposite to Guayaquil Gulf. The most abundant species were: Gallineta (Prionotus stephanophrys) (37283,7 t), Barriga juma (Larimus spp) (16146,2 t), Perela (Paralabrax spp) (14053,4 t), Palometa (Peprilus medius)(9865,3 t) and Cabezudo (Caulolatilus...
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Biomass; Geographical distribution; Population density; Demersal fisheries; Biomass; Geographical distribution; Population density; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 1995
URL: http://hdl.handle.net/1834/3029

Algunos resultados de las campañas primaverales de evaluación anual de anchoíta bonaerense efectuadas entre 1993 y 1996.
Provedor de dados: 20
Autores: Hansen, J.E.; Madirolas, A.
Information resulting from four spring acoustic surveys carried out between 1993 - 1996 to assess bonaerensis anchovy (Engraulis anchoita) biomass (34°- 41°30´S) is presented. Annual estimates, successively higher, went from 1.5 to 5.3 millon tons and the respective coefficient of  variability that followed the same trend ranged between 7.4.  and 28.0. . In general terms, the largest abundances were those recorded within the coastal strata off the Río de la Plata followed by those of the most southern stratum. Nevertheless, during the 1996 survey, the latter showed very high biomass values and, consequently, the largest mean. The region corresponding to the main commercial anchovy fishing ground during the season  represented, in any case, relatively low...
Tipo: Journal Contribution
Palavras-chave: Echo surveys; Biomass; Sexual maturity; Growth; Mortality; Biomass; Growth; Sexual maturity; Mortality; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999
URL: http://hdl.handle.net/1834/2531

Distribución del fitoplancton en la región costera del mar ecuatoriano, durante diciembre 2000
Provedor de dados: 20
Autores: Torres, G.; Tapia, M.E.
La presente investigación describe el comportamiento del primer nivel trófico (clorofila, feopigmentos, biomasa celular e indicadores del fitoplancton) en el ecosistema costero del mar ecuatoriano, conocer la incidencia de las principales especies que se encuentran formando núcleos de mayor productividad e inter-relacionadas con las condiciones ambientales durante el Crucero realizado en diciembre/2000.
Tipo: Journal Contribution
Palavras-chave: Distribution; Phytoplankton; Chlorophylls; Biomass; Indicator species; Cruises; Distribution; Phytoplankton; Biomass; Chlorophylls; Indicator species; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_35790.
Ano: 2002
URL: http://hdl.handle.net/1834/2260

Hacia una cuantificación de estrés ecológico en el embalse de Rincón del Bonete (Uruguay)
Provedor de dados: 20
Autores: Amestoy, F.J.
La presente tesis respondió preguntas importantes para el conocimiento del embalse de Rincón del Bonete (EdRB) y para la obtención de los puntos de referencia para la determinación de estrés ecológico en el mismo. Los objetivos específicos comprendieron la determinación de los aspectos limnológicos más relevantes, la caracterización del embalse según su estado trófico, así como el conocimiento del estado de explotación de la especie íctica mas relevante desde el punto de vista comercial. Se determinaron indicadores que permitieron aportar información de base para cuantificar el grado de perturbación del embalse a fin de adoptar estrategias de conservación y manejo, así como definir las zonas más sensibles de impacto ambiental. Se evaluó la variabilidad...
Tipo: Theses and Dissertations
Palavras-chave: M40; Limnology; Environmental monitoring; Artificial lakes; Resource conservation; Ecological balance; Indicators; Echo surveys; Freshwater lakes; Experimental fishing; Biomass; Limnology; Environmental monitoring; Biomass; Artificial lakes; Resource conservation; Ecological balance; Http://aims.fao.org/aos/agrovoc/c_4343; Http://aims.fao.org/aos/agrovoc/c_37876; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_8961; Http://aims.fao.org/aos/agrovoc/c_6523; Http://aims.fao.org/aos/agrovoc/c_34928.
Ano: 2001
URL: http://hdl.handle.net/1834/2611

La rhodophycée Gelidium spinosum (s.g. Gmelin) p.c. Silva, des cotes de Monastir : lumière sur quelques aspects hydro-biologiques
Provedor de dados: 20
Autores: Romdhane, M.S.; Ben Said, R.; El Abed, A.; M'Rabet, R.
في هذه الدراسة تمت متابعة الطحلب الأحمر  Gelidium spinosum  على سواحل المنستير منذ سبتمبر 2000 إلى أوت 2001 و أبرزت النتائج المتحّصل عليها أن الوزن الأقصى تم تسجيله في ماي وهو حوالي 37غ أما الطول الأقصى (11 صم) فقد تم الحصول عليه في شهر جوان . و أما الكتلة الحيوية الأعلى فقد تم التحصل عليها في شهر ماي (حوالي 7 كغ/م2) . أما نسبة الخصوبة فتراوحت بين 0 و 100% . كل هذه النتائج بينت لنا أن الطحلب  Gelidium spinosum هو نبتة معمرة لكن حضورها متميز أكثر في الربيع والصيف .
Tipo: Journal Contribution
Palavras-chave: Gelidiales  Gelidium spinosum  Rhodophyta; Biomass; Fertility; Length; Seaweeds; Weight; Biomass; Length; Fertility; Seaweeds; Weight; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_4260; Http://aims.fao.org/aos/agrovoc/c_2862; Http://aims.fao.org/aos/agrovoc/c_14154; Http://aims.fao.org/aos/agrovoc/c_8349.
Ano: 2007
URL: http://hdl.handle.net/1834/4285

Identificación de las variables que afectan a la fracción desovante de la población bonaerense de anchoíta (Engraulis anchoita) mediante el uso de modelos lineales generalizados
Provedor de dados: 20
Autores: Leonarduzzi, E.; Di Marco, E.J.; Pájaro, M.
The daily spawning females fraction (S) of Argentine anchovy (Engraulis anchoita) in relation to the year, length, proportion of females, temperature and salinity variables was studied using generalized linear models. Samples were collected during eleven research surveys carried out in the main spawning seasons and areas during 1993-2008 (Southwest Atlantic Ocean, Argentine Sea). The aim of this work was to identify the factors that affect the spawning activity. No temporary differences were observed and an S 0.12 average value was estimated. The poor explanatory percentage of the models analyzed did not allow to clearly detect the variables that could affect S. Length and temperature were the only variables that related positively, which suggests that...
Tipo: Journal Contribution
Palavras-chave: Pelagic fish; Reproduction; Biomass; Spawning; Mathematical models.
Ano: 2013
URL: http://hdl.handle.net/1834/5492

Evaluación de merluza de cola (Macruronus magellanicus) en el Atlántico Sudoccidental. Período 1985-2001
Provedor de dados: 20
Autores: Wöhler, O.C.; Hansen, J.E.; Giussi, A.R.; Cordo, H.D.
Period 1985-2001. A stock assessment of Patagonian hoki of the Southwest Atlantic was carried out by using data from the years 1985-2001. A cohort analysis, fitted with some survey abundance indices was used in an adaptive conceptual framework. Simulation trials were performed to project the evolution of the fishery, to evaluate the risk of over-fish the stock under different exploitation levels, and to estimate Biologically Acceptable Catches (BAC). Both total biomass and spawning stock biomass showed increasing trends resulting from four strong year classes (1993, 1995, 1996 and 1998). Total biomass at the beginning of 2001 was estimated to be 2.5 million tons, and spawning stock biomass at the spawning time (August) was estimated to be around 1.28...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Fishery management; Biomass; Risks; Demersal fisheries; Stock assessment; Fishery management; Biomass; Demersal fisheries; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2173.
Ano: 2007
URL: http://hdl.handle.net/1834/2525

Estimación del nivel óptimo de mortalidad por pesca y riesgo de sobreexplotación de la castañeta (Cheilodactylus bergi)
Provedor de dados: 20
Autores: Wöhler, O.C.; Cordo, H.D.
Patagonian scallop (Zygochlamys patagonica King &amp; Broderip, 1832): A new fishery in the Argentine continental shelf. Yield-per-recruit model was applied to the stock of castañeta (Cheilodactylus bergi)in the Argentine-Uruguayan Common Fishing Zone (Southwest Atlantic, among 34° and 39°30' S), in order to estimate the range of F0.1 values resulting from the uncertainty in the parameters of the model. Simulations with variations in natural mortality and recruitment were carried out, in order to estimate the risk of overfishing associated with different fishing mortality levels. The criterion that spawning stock biomass be mantained over 35. of its unexploited level was adopted. For an optimum age of first capture of 4 years, the range of calculated F0.1...
Tipo: Journal Contribution
Palavras-chave: Fishing mortality; Overfishing; Biomass; Yield; Biomass; Overfishing; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_34068.
Ano: 1999
URL: http://hdl.handle.net/1834/1873

Water quality trends and input loads to Lake Nakuru
Provedor de dados: 20
Autores: Kulecho, Andrew; Muhandiki, Victor.
Water quality trends of Lake Nakuru, Kenya and its feeder streams were monitored in 2001-2004. Water samples were obtained from eleven stations in the lake and five points on inflowing streams. The items monitored were physico-chemical and biological components. The drainage basin was characterized by recurrence of dry spells throughout the period with water losses in the lake exceeding the amount received to cause a fall in water volume. The lake water salts content rose – conductivity and alkalinity reached 58 ms/cm and 5,200 mg/l respectively. PH was more or less constant (10.00 – 10.36). Daytime oxygen concentration in the mid-lake system rose (to greater than 20 mg/l) while remaining low in the inflow portions of the lake. On one occasion, the lake...
Tipo: Proceedings Paper
Palavras-chave: Water quality; Biomass; Mortality causes; Anthropogenic factors; Phytoplankton; Pollution effects; Degradation; Man-induced effects; Inland waters; Freshwater pollution; Physicochemical properties; Inflow; Environmental monitoring; Land use; Urbanization; Environmental impact; Pollution; Freshwater.
Ano: 2006
URL: http://hdl.handle.net/1834/5312

Procesos planctónicos en el Golfo de Guayaquil (Campo Amistad) julio-agosto/2001
Provedor de dados: 20
Autores: Torres,  G.; Calderón, T.; Mero, M.; Franco, V.
This research is part of an environmental monitoring of plankton and its physical and chemical response around the platform located offshore Campo Amistad, near Santa Clara Island, southeast of the Gulf in external Guayaquil. The study was carried out between july 30 and augut 31-2001, onboard the R/V  Orión of the Oceanographic Institute of the Ecuadorian Navy. The chlorophyll "a" biomass presented values between 0.6 and 1.52 mg/m3 in surface waters, with averages of 1.07 to 0.99 mg/m3 (10 m), 0.79 (20 m) and 0.58 (30 m) mg/m3. The larger amounts of biomass and daily variability were found in the northern part of the platform, while the opposite trend was observed in its western area. One hundred and three phytoplankton species were identified, with...
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Chlorophylls; Biomass; Zooplankton; Environmental assessment; Producttion platforms; Nutrients (mineral).
Ano: 2003
URL: http://hdl.handle.net/1834/5762

Uso de la levadura Torula (Torulopsis utilis) en la obtención de biomasa de Artemia
Provedor de dados: 20
Autores: Tizol-C., Rafael.
Se llevaron a cabo estudios para determinar la factibilidad del uso de la levadura torula (Tomlopsis utilis), como fuente de alimento en cultivos intensivos de Anemia. Se alcanzaron rendimientos máximos de biomasa de 5.14 g/l y 8.43 mm de largo medio total en la vanante de mejores resultados. Concentraciones de levadura de 1 g/l/día en el período inicial de 6 días pueden considerarse adecuadas para el crecimiento de la Artemia, mientras que concentraciones de 3.5 y 7 g/l/día son excesivas. A partir del séptimo día 3 g/l/día constituye una concentración apropiada de alimento mientras que 1 g/l/día es insuficiente para obtener un crecimiento satisfactorio en esta etapa. Las ecuaciones de crecimiento para este cultivo en las condiciones descritas son las...
Tipo: Journal Contribution
Palavras-chave: Yeasts; Biomass; Food; Biomass; Food; Yeasts; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_9001003; Http://aims.fao.org/aos/agrovoc/c_8480.
Ano: 1994
URL: http://hdl.handle.net/1834/3750

Evaluación hidroacústica del reclutamiento de anchoveta y sardina común entre la V y X Regiones, año 2004
Provedor de dados: 20
Autores: Castillo, J.; Saavedra, A.; Gálvez, P.; Núñez, S.; Ortiz, J.; Torres, P.; Véjar, F.; Molina, E.; Cerna, F.; López, A.A.; Bustos, L.
Se presentan los resultados de la evaluación acústica de biomasa, abundancia y distribución espacial; oferta ambiental de alimentos y las condiciones oceanográficas físicas asociadas a la anchoveta y sardina común en el período de reclutamiento de enero del año 2005 en la zona centro-sur.
Tipo: Report
Palavras-chave: Stock assessment; Biomass; Abundance; Geographical distribution; Environmental conditions; Echo surveys; Stock assessment; Biomass; Geographical distribution; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2005
URL: http://hdl.handle.net/1834/1748

Estudio de las comunidades del fitoplancton y zooplancton en Monteverde, Península de Santa Elena, Ecuador durante noviembre de 2006
Provedor de dados: 20
Autores: Tapia, M.E.; Naranjo, Ch.
El presente estudio se efectuó frente a la localidad de Monteverde, Península  de Santa Elena, monitoreándose un total de 15 estaciones durante los estados de marea de flujo y reflujo en noviembre de 2006. Las mayores concentraciones de clorofila a: Se observó en la estación 9 en la capa superficial con valores de 0.90  mg/m3 determinándose como un área de mayor productividad y la menor concentración se registró en la estación 4 con valor de 0.10 mg/m3 durante la fase de flujo. En la comunidad fitoplanctónica se determinó dos áreas de mayor diversidad y abundancia de especies: La primera se observó en las estaciones 4 y 6 durante flujo registrándose la mayor abundancia relativa, la segunda corresponde a las estaciones 10 y 11 en reflujo. Se destaca la...
Tipo: Journal Contribution
Palavras-chave: Chlorophylls; Phytoplankton; Zooplankton; Biomass; Aquatic communities; Phytoplankton; Zooplankton; Biomass; Aquatic communities; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_553; Http://aims.fao.org/aos/agrovoc/c_1577.
Ano: 2009
URL: http://hdl.handle.net/1834/3348

La caballa (Scomber japonicus) y las condiciones del ambiente en elárea "El Rincón" 39°40'-41°30'S del Mar Argentino. Septiembre 2000
Provedor de dados: 20
Autores: Perrotta, R.G.; Viñas, M.D.; Madirolas, A.; Reta, R.; Akselman, R.; Castro Machado, F.; Garciarena, A.D.; Macchi, G.J.; Moriondo Danovaro, P.; Llanos, V.; Urteaga, J.R.
Between September 1st and 6th a research cruise was carried out in the Buenos Aires shelf area of "El Rincon" 39°40'-41°30'S, Argentine Sea SW Atlantic. The total area studied was 2,527.8 nautical mile2. Knowledge of the commercial fleet location at the time of the survey allowed to intensify sampling in a 'miniarea' of 52,8 nautical mile2. The acoustic assessment of chub mackerel (Scomber japonicus) biomass was 49,511.9 t, 94 of which corresponded to this last area. Fish samples coming from fishing trawls included only adult individuals of 240-460 mm total length (TL) and ages ranging 2-11 years. The limit age was estimated at 13 years and natural and total mortality rates at 0.23 and 0.54, respectively. Oceanographic conditions were those typical of the...
Tipo: Journal Contribution
Palavras-chave: Population characteristics; Echo surveys; Mackerel fisheries; Fishery oceanography; Biomass; Environmental conditions; Fishery oceanography; Biomass; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_2938; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2003
URL: http://hdl.handle.net/1834/2418

Dinámica espacial y temporal de la biomasa algal asociada a las raíces de mangle en la Bahía de Buenaventura, Costa Pacífica de Colombia.
Provedor de dados: 20
Autores: Peña-Salamanca, E.J.
La variación espacial y temporal de la biomasa de especies de macroalgas asociadas al manglar que crecen en raíces de Rhizophora mangle y neumatóforos de Avicennia germinans en la bahía de Buenaventura, Colombia, fueron estudiadas en tres estaciones entre noviembre de 1999 y septiembre de 2003. Dieciocho especies fueron colectadas en todas las estaciones, las cuales incluyeron nueve Rhodophyceae, cinco Chlorophyceae y cuatro Cyanophyta (Cianobacterias). Cuatro especies (tres Rhodophyceae y una Ulvophyceae) dominaron la flora algal contribuyendo al 90 % de la biomasa total algal. Bostrychia calliptera fue la especie dominante con 32 % de la biomasa total, seguida por Boodleopsis verticillata (26 %), Catenella impudica (18 %) y Caloglossa leprieurii (12 %)....
Tipo: Journal Contribution
Palavras-chave: Biomass; Mangroves; Distribution; Biomass; Distribution; Mangroves; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_16190.
Ano: 2008
URL: http://hdl.handle.net/1834/3491

Estudio de las comunidades del fitoplancton en los Ríos Daule, Guayas y Estero Salado
Provedor de dados: 20
Autores: Tapia, M.E.
El objetivo del presente estudio es evaluar la biomasa, diversidad y relación del fitoplancton con las comunidades planctónicas estuarinas basándose en las condiciones ambientales durante la época de verano.
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Distribution; Chlorophylls; Species diversity; Biomass; Rivers; Salt marshes; Environmental factors; Summer; Cell counters; Phytoplankton; Distribution; Biomass; Rivers; Environmental factors; Summer; Chlorophylls; Species diversity; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_2594; Http://aims.fao.org/aos/agrovoc/c_7519; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2002
URL: http://hdl.handle.net/1834/2292

Applying a non-parametric bootstrap technique to assess the accuracy of biomass estimates of argentine anchovy (Engraulis anchoita) northern stock (34º S-41º S) with the Daily Egg Production Method. 1993-2008 period
Provedor de dados: 20
Autores: Pájaro, M.; Hansen, J.E.; Leonarduzzi, E.
Engraulis anchoita northern stock reproductive biomass (SSB) during the 1993-2008 period was estimated applying the Daily Egg Production Method (DEPM) and accuracy of estimates assessed using a bootstrap technique (SW Atlantic Ocean, Argentine Sea). The basic data were collected in different research surveys carried out in late Spring, at the peak of the spawning season. The aim of this work was to build reliable confidence intervals around the estimates of the mean reproductive biomass applying a non-parametric bootstrap method. Resampling methods are becoming increasingly popular as statistical tools as they are robust and do not require the assumption of any particular distribution of the basic data. This is especially relevant when assessing the DEPM...
Tipo: Journal Contribution
Palavras-chave: Spawning; Stocks; Fecundity; Biomass; Statistical analysis.
Ano: 2013
URL: http://hdl.handle.net/1834/5494

Abondance relative et estimation de la biomasse des petits pélagiques des eaux tunisiennes
Provedor de dados: 20
Autores: Ben Abdallah, L.; Hattour, A.; Guennegan, Y.
Deux  campagnes de prospection sur les petits pélagiques s'inscrivant dans le cadre du Programme National Mobilisateur (PNM), "Evaluation de ressources pélagiques et démersales des eaux tunisiennes" (1996-1999) ont été menée en étroite collaboration avec l’Institut Français de Recherche et d’Exploitation de la Mer (IFREMER). Ces campagnes ont pour objectifs de préciser l'abondance relative des petits pélagiques et leur variabilité spatiaux-temporelles mais également de quantifier les potentiels exploitables des stocks des animaux aquatiques préalablement définis, et surtout de familiariser l’équipe des scientifiques tunisiens, aux méthodes numériques et informatiques utilisées en participant à la lecture des échogrammes et aux traitements des données des...
Tipo: Journal Contribution
Palavras-chave: Abundance; Biomass; Pelagic fisheries; Potential yield; Stock assessment; Biomass; Stock assessment; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2004
URL: http://hdl.handle.net/1834/1163

Ecología trófica de la merluza común (Merluccius hubbsi) del Mar Argentino. Parte 3. Consumo anual de alimento a nivel poblacional y su relación con la explotación de las pesquerías multiespecíficas.
Provedor de dados: 20
Autores: Prenski, L.B.; Angelescu, V.
The English contents gives a general view on the topics treated in this contribution developed mainly on the basis of a quantitative and ecological analysis of trophic relationships in the Argentinian Continental Shelf, in which common hake and its food species are involved (anchovy, mictophids, small fishes, squids and macrozooplankton crustaceans). The most original part consist in the application of bioenergetic and simulation models for estimating the annual food consumption by individuals and by stocks of common hake during 1970-1987, considering at the same time, the effects of commercial catches on the stockbiomasses in predator-prey relationships. From this point of view three trophic-fishery relationships are evident, namely: "Common...
Tipo: Journal Contribution
Palavras-chave: Trophic relationships; Food consumption; Mathematical models; Simulation; Biomass; Food consumption; Simulation; Biomass; Mathematical models; Http://aims.fao.org/aos/agrovoc/c_3016; Http://aims.fao.org/aos/agrovoc/c_5209; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24199.
Ano: 1993
URL: http://hdl.handle.net/1834/2557

Resultados de la campaña de evaluación de peces demersales australes efectuada en el verano de 1997.
Provedor de dados: 20
Autores: Wöhler, O.C.; Giussi, A.R.; García de la Rosa, S.B.; Sánchez, M.F.; Hansen, J.E.; Cordo, H.D.; Alvarez Colombo, G.L.; Incorvaia, I.S.; Reta, R.; Abachián, V.E.
An assessment survey on the austral fish was carried out during the summer 1997 on both the shelf and slope off southern Argentina. The cruise covered 101,508 nm2 between 45° and 54° 30'S and depths between 50 and 400 m. The survey did not include the area controlled by the United Kingdom. Considering the total area as an undivided stratum, a random sampling was used to estimate demersal fish biomass and a delta distribution-based model to evaluate mean densities. Out of the forty five species caught 28 were bony fish and 17 elasmobranch. Four cephalopod mollusc species were also identified. A biomass of 3.2 million tons (CI(95o/o): 1.90 - 6.06 millions) proved that longtail hake was the most abundant resource within the region followed by common hake...
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Fishery surveys; Biomass; Population structure; Feeding; Parasitism; Environmental conditions.
Ano: 1999
URL: http://hdl.handle.net/1834/5782

Use of environmental parameters to explain the variability in spawnerrecruitment
Provedor de dados: 20
Autores: Kirchner, C. H.; Bartholomae, C. H.; Kreiner, A.
This study attempts to explain the variability in recruitment of sardine in the northern Benguela and to develop potential models by including environmental information to predict recruitment. Two different recruitment and spawner number datasets were available: a VPA-developed dataset, for the period 1952–1987, and data from a simple age-structured model for 1992–2007. In all, four environmental indices were used: the degree of the intrusion of the warm Angola Current into northern Namibia, termed the Angola–Benguela front index; the extent of the upwelling area off central Namibia; average sea surface temperature (SST) over the northern and central Namibian shelf; and wind stress anomalies at Lüderitz as an indicator of upwelling strength. Contrary to...
Tipo: Journal Contribution
Palavras-chave: Currents (water); Upwelling; Sardine fisheries; Environments; Ecosystems; Anomalies; Biomass; Spawning; Recruitment.
Ano: 2009
URL: http://hdl.handle.net/1834/4671

Distribución de clorofila "a" y feopigmentos en el Estrecho Bransfield, Bahía Chile y Paso Drake durante el verano de 1998 (Antártica)
Provedor de dados: 20
Autores: Torres Ch., G.
Se estima la productividad primaria en concentración de clorofila "a" y feopigmentos, como indicativo de la calidad del primer nivel trófico-fitoplancton, registrados en el Estrecho Bransfield, Bahía Chile (Noreste de la Isla Greenwich) y en el Paso Drake, durante la VII Expedición Ecuatoriana a la Antártida a bordo del B/I ORION durante el verano austral de 1998. La biomasa fitoplanctónica superficial de clrofila "a" en el Estrecho Bransfield, registró las mayores concentraciones (0.7-0-8 mg/m3) hacia el noreste del estrecho, y las menores concentraciones de 0.2 mg/m3 se localizaron hacia el centro. A nivel subsuperficial de los 20 m se registraron las más altas concentraciones de toda la columna de agua (0-100 m), con una distribution latitudinal casi...
Tipo: Journal Contribution
Palavras-chave: Chlorophylls; Pigments; Biomass; Biological production; Phytoplankton; Polar waters; Pigments; Biomass; Biological production; Phytoplankton.
Ano: 1998
URL: http://hdl.handle.net/1834/3846

Uso de técnicas geoestadísticas en la estimación de la abundancia de vieira patagónica (Zygochlamys patagonica).
Provedor de dados: 20
Autores: Lasta, M.L.; Hernandez, D.R.; Bogazzi, E.; Burgos, G.; Valero, J.; Lucifora, L.O.
To evaluate absolute biomass, a research cruise was conducted on three scallop (Zygochlamys patagonica)beds (38°S-56°W, September 1998). The estimated bed surface was 1,162 nm(2). Sampling stations were regularly spaced at 5 nm intervals. A total of 118 trawls were performed with a non-selective dredge 2,5 m wide (efficiency 16-21. ). Trawls duration and speed were 10 minutes and 3 nm.h(-1)respectively. Samples were taken to estimate total and commercial (greater or equal than 55 mm total height)scallop weight and size frequency distribution. Coefficients of variation (CV)of the estimated biomass were calculated for each bed using geoestatistical techniques and a simple random sampling alternative with the same number of samples. The CVs for total scallop...
Tipo: Journal Contribution
Palavras-chave: Fishery surveys; Scallop fisheries; Biomass; Abundance; Biomass; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2001
URL: http://hdl.handle.net/1834/1870

The abundance, biomass and composition of pelagic ciliates in East African lakes of different salinity and trophy
Provedor de dados: 20
Autores: Yasindi, A. W.; Taylor, W. D.
Planktonic ciliates were studied in 17 tropical East African lakes of different salinity and trophic status. Oligotrichs (e.g., Strombidium, Strobilidium and Halteria) and scuticociliates (e.g., Cyclidium, Pleuronema, Cristigera), dominated the ciliate communities. Conductivity and trophic status were the most important environmental variables influencing the distribution of ciliate species in East African lakes. Herbivorous oligotrichs were important in oligotrophic and mesotrophic lakes, as they are in temperate and subtropical lakes, but their importance decreased with increasing chlorophyll a concentration and conductivity. On the other hand, the importance of scuticociliates (primarily bacterivores) increased with increasing chlorophyll a and...
Tipo: Proceedings Paper
Palavras-chave: Freshwater lakes; Abundance; Biomass; Pelagic environment; Salinity; Plankton; Community composition; Oligotrophic lakes; Aquatic communities; Regression analysis; Tropical lakes; Species diversity; Plankton; Freshwater.
Ano: 2006
URL: http://hdl.handle.net/1834/5311

Microbial status of different carbon sequestering systems in the semi-arid tropics
Provedor de dados: 30
Autores: Vineela, C.
Palavras-chave: Soil respiration; Respiration; Soil sampling; Soil treatment; Farmyard manure; Biomass; Soil organisms; Genetic soil types; Carbonation; Zero tillage.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3327

Standardization of a Protocol to Screen for Salinity Tolerance in Groundnut
Provedor de dados: 30
Autores: Vadez, V.
Palavras-chave: Genotypes; Root nodulation; Tolerance; Biomass; Protocols; Leaf area; Groundnuts; Chlorophylls; Field capacity; Tissue analysis.
Ano: 2005
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3263

Performance of ICRISAT pigeonpeas in China
Provedor de dados: 30
Autores: Yang, S.
Palavras-chave: Pigeonpeas; Germplasm; Biomass; Soil conservation; Intercropping; Forestry; Wet season; Cropping systems; Legumes; Crops.
Ano: 2001
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3339

Pearl millet germplasm adapted to saline conditions
Provedor de dados: 30
Autores: Kulkarni, V.N.
Palavras-chave: Germplasm; Millets; Tolerance; Planting; Grain; Yields; Biomass; Genetic resources; Sorghum; Field experimentation.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3201

International study on &lt;i&gt;Artemia&lt;/i&gt; : 48. The effect of temperature on cyst hatching larval survival and biomass production for different geographical strains of brine shrimp &lt;i&gt;Artemia&lt;/i&gt; spp.
Provedor de dados: 27
Autores: Vanhaecke, P.; Sorgeloos, P.
The effect of temperature on different geographical strains of &lt;i&gt;Artemia&lt;/i&gt; has been studied for the following criteria: the hatchability of the cysts, the resistance of the larvae to high temperature (34°C) and the biomass production of larvae cultured under standard conditions. Experimental temperatures ranged from 25° to 37°C for the hatching criteria and from 20° to 32.5°C for the biomass production.Both the hatching percentage and growth performance are affected by temperature. However, the relative and quantitative impact of temperature varies widely among &lt;i&gt;Artemia&lt;/i&gt; strains. This is also the case for the temperature resistance of the larvae. The impact of increasing temperatures on cyst hatching as well as the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture techniques; Biomass; Brine shrimp culture; Growth; Larvae; Survival; Temperature effects; Artemia.
Ano: 1989
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3194

Size spectra, body width and morphotypes of intertidal nematodes: an ecological interpretation
Provedor de dados: 27
Autores: Tita, G.; Vincx, M.; Desrosiers, G.
Nematode species from three intertidal assemblages (St Lawrence Estuary, Quebec, Canada) were studied in order to form an ecological interpretation of three allometric attributes: body width, size spectra, and morphotypes. The three assemblages were characterized by a very similar sediment grain median (Md) but different silt-clay proportions: A1 (upper-tidal level; Md=122 µm; silt=34.8%), A3 (mid-tidal level; Md=182 µm; silt=12.8%), and A5 (lower-tidal level; Md=122 µm; silt=6.8%). Silt-clay proportions were an influential factor in determining the mean nematode body width, used as a morphological discriminant between burrowing and interstitial organisms. A plot of the number of species vs the body width-classes showed two peaks: between 19.3 and 22.6 µm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Benthos; Biomass; Diversity; Meiobenthos; Transport.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7340

Observations on the feeding ecology of estuarine nematodes
Provedor de dados: 27
Autores: Moens, T.; Vincx, M.
Observations on living estuarine nematodes show that previous feeding type classifications do not accurately represent the trophic structure of an intertidal mudflat in the Westerschelde Estuary (Netherlands). A new scheme with six major nematode feeding guilds is proposed: (1) microvores; (2) ciliate feeders; and (3) deposit feeders sensu stricto are all nematodes without a distinct buccal armature. In the first two groups bacteria and protozoa, respectively are the major particulate food sources, while other items are included in the diet of the third. The three other categories are recognized among the nematodes with a buccal armature: (4) epigrowth feeders; (5) facultative predators; and (6) predators. Diatoms and other microalgae are an important...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biology; Biomass; Carbon; Habits; Habits; Meiobenthos; Water.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7298

Maturation performance of &lt;i&gt;Penaeus vannamei&lt;/i&gt; co-fed &lt;i&gt;Artemia&lt;/i&gt; biomass preparations
Provedor de dados: 27
Autores: Naessens, E.; Lavens, P.; Gomez, L.; Browdy, C.L.; McGovern-Hopkins, K.; Spencer, A.W.; Kawahigashi, D.; Sorgeloos, P.
Few shrimp hatcheries successfully propagate captive broodstock on a commercial scale. Diets for acceptable maturation performance of &lt;i&gt;Penaeus vannamei&lt;/i&gt; have typically relied on the inclusion of marine polychaetes (bloodworm) from Panama or Maine, USA, which are expensive and are of unpredictable supply. Studies were therefore undertaken at experimental and commercial scale to replace or supplement the polychaetes by frozen ongrown &lt;i&gt;Artemia&lt;/i&gt; which were either non-enriched or bioencapsulated with specific boosters. In experiment 1 the control diet consisted of frozen squid only and was evaluated against broodstock diets where 60% of the squid was substituted by bloodworm or enriched &lt;i&gt;Artemia&lt;/i&gt; biomass....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Feeding experiments; Sexual maturity; Artemia; Penaeus vannamei.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2967

A seasonally varying biotope at Signy Island, Antarctic: implications for meiofaunal structure
Provedor de dados: 27
Autores: Vanhove, S.; Beghyn, M.; Van Gansbeke, D.; Bullough, L.W.; Vincx, M.
Under the typical high-latitude conditions of temperature, productivity and settlement of chlorophyll and phaeophytin to the sediment, many benthic organisms in the Antarctic show strong seasonal variation. Although meiofauna comprise an important component of the southpolar benthic ecosystem, our knowledge of them is limited. The metazoan meiofauna and the surrounding sediments were studied fortnightly for 18 mo in a shallow bay at Signy Island (Factory Cove, South Orkneys, Antarctica) to test whether and how the temporal variability of the environment influenced meiobenthos dynamics. By examination of the distribution of the abundance and biomass of the total community, the density of higher taxonomic groups, and of individual dominant nematode genera...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Benthos; Biomass; Population density; Seasonal variations; Sediment analysis; Trophic relationships; Copepoda [copepods]; Nematoda [Nematodes]; Ostracoda.
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=6138

Production and evaluation of lignocellulosic residue briquettes
Provedor de dados: 190
Autores: Paula, Luana Elis de Ramos e; Trugilho, Paulo Fernando; Rezende, Raphael Nogueira; Assis, Claudinéia Olímpia de; Baliza, Ana Elisa Rodarte.
This study aimed to produce and evaluating the briquettes made from residues of plant biomass and test different times and temperatures. The material utilized was composed of wood processing residues (wood shaving and sawdust), coffee bean parchment and coffee tree stem, beam stem and pod, soybean stem and pod, rice husk, corn leaf, stem, straw and cob and sugar cane straw and bagasse. Briquetting was performed at a pressure of 150 Bar. Different times were tested for briquetting sawdust from wood and different temperatures for rice husk and parchment coffee. For evaluation of the briquettes quality, the apparent relative density, compression resistance and combustion index were determined. The results indicated that the briquetting time and temperature...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy; Biomass; Briquetting Energia; Biomassa; Briquetagem.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/253

Organic carbon contents of three tree species in different spacing
Provedor de dados: 190
Autores: Behling, Alexandre; Sanquetta, Carlos Roberto; Caron, Braulio Otomar; Schimidt, Denise; Elli, Elvis Felipe; Corte, Ana Paula Dalla.
This study aimed to evaluate the content of organic carbon in plant parts (leaves, wood, twigs and bark) of forest species Acacia mearnsii De Wild, Eucalyptus grandis Hill and Mimosa scabrella Benth, under different spacing between trees (2.0 m x 1.0 m, 2.0 m x 1.5 m, 3.0x1.0 m and 3.0 m x 1.5 m), one year after planting. It was also aimed to verify if the conversion factor of 50% can be applied. To determine the organic carbon it was used a carbon analyzer(C-144). The carbon content varied depending on the species, spacing and the part of the plant component used. It was observed that the factors: species, spacing, and parts of the plant are not independent. So, the carbon content measurements should be determined for each species and for each biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest species; Biomass; Planting densities Recursos Florestais; Engenharia Florestal; Manejo Espécies florestais; Biomassa; Densidades de plantio.
Ano: 2014
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/562

Avaliação de clones de Eucalyptus em diferentes locais visando à produção de carvão vegetal
Provedor de dados: 190
Autores: Neves, Thiago Andrade; Protásio, Thiago de Paula; Couto, Allan Motta; Trugilho, Paulo Fernando; Silva, Vinícius Oliveira; Vieira, Carlos Magno Melo.
Os objetivos desse trabalho foram avaliar a qualidade da madeira e do carvão vegetal de três clones de Eucalyptus plantados em diferentes locais e verificar a relação funcional existente entre a densidade básica e a profundidade de penetração do pino do Pilodyn. Foram avaliados três clones de Eucalyptus e amostradas quatro árvores por clone em cada local. Determinou-se a profundidade de penetração de um pino de aço do Pilodyn a 1,30 m de altura do solo (DAP), a densidade básica média (DBm), a densidade básica no DAP, o poder calorífico superior e os teores de lignina, extrativos totais, cinzas, holocelulose e a análise química elementar (C, H, N e O). A madeira foi carbonizada e o carvão produzido foi avaliado quantitativamente e qualitativamente. Na...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergy; Biomass; Wood quality Bioenergia; Biomassa; Qualidade da madeira.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/275

Torrefaction of eucalyptus wood chips for energy purposes
Provedor de dados: 190
Autores: Pereira, Matheus Perdigão de Castro Freitas; Costa, Emylle Veloso Santos; Corradi Pereira, Bárbara Luísa; Carvalho, Ana Márcia Macedo Ladeira; Oliveira Carneiro, Angélica de Cássia; Costa, Aylson.
Torrefaction also known as pre-carbonization is heat treatment at low temperatures (200 ºC to 300 °C), applied to lignocellulosic materials with the aim of improving their energetic properties. We developed this study to evaluate the effect of torrefaction temperature on properties of eucalyptus chips. Using a furnace, the eucalyptus chips underwent four heat treatments at temperatures of 150 ºC, 200 ºC, 250 ºC and 300 °C, for ten min. Physical and chemical analyzes of torrefied and in natura chips were carried out. The results were submitted to analysis of variance and when established significant differences, applied Tukey test at 95% significance. Increasing roasting temperature showed higher lignin content and fixed carbon, less equilibrium moisture...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Thermal treatment; Wood chips.
Ano: 2016
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1093

Avaliações de sítio e produtividade em plantios de Eucalyptus urograndis com 3 anos de idade em São Paulo, Brasil
Provedor de dados: 190
Autores: Andrade, Guilherme de Castro; Bognola, Itamar Antonio; Bellote, Antonio Francisco Jurado; Franciscon, Luziane; Waterloo, Maarten Johannes; Bruijnzeel, Leendert Adriaan.
No Brasil os plantios florestais ocupam 7 milhões de hectares que correspondem a 1% do território (68% com plantações de Eucalyptus e 25% com Pinus) O objetivo desse trabalho foi avaliar plantios de Eucalyptus urograndis. Estoques elevados de Ca e Mg no solo, sugerem uma lixiviação do calcário. A resistência do solo até os 60 cm de profundidade na linha de plantio foi menor do que na entrelinha, indicando que a subsolagem foi eficiente. Os valores de resistência do solo foram mais altos na entrelinha, distante 1 m da linha de plantio, até os 20 cm de profundidade, provavelmente pelo aumento da compactação na preparação da área. A biomassa da copa das árvores diferiu entre as classes de DAP, justificando o uso de equação para a sua estimativa. A variação...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest plantation; Biomass; Litter; Soil fertility; Soil strength Plantação florestal; Biomassa; Serapilheira Fertilidade do solo; Resistência do solo.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/273

Earthworm communities in organic and conventional coffee cultivation
Provedor de dados: 86
Autores: Bartz,Marie Luise Carolina; Brown,George Gardner; Pasini,Amarildo; Fernandes,Juliana de Oliveira; Curmi,Pierre; Dorioz,Julie; Ralisch,Ricardo.
The objective of this work was to evaluate the effect of organic and conventional coffee crops on biomass, population density and diversity of earthworms, in Lerroville, district of Londrina County, Paraná state, Brazil. Earthworm communities were sampled in three areas with organic coffee cultivation (CO1, CO2 and CO3), two with conventional coffee (CC1 and CC2), and a native forest fragment (MT). The soil of the areas CO1, CC1, and MT was classified as Nitossolo Vermelho (Rhodic Kandiudox), while CO2, CO3, and CC2 were on Latossolo Vermelho (Rhodic Hapludox). Eight samples were taken in each area on two occasions, winter and summer, using the Tropical Soil Biology and Fertility (TSBF) method in the 0-20 cm soil layer. The earthworms were handsorted and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Conventional cultivation; Diversity; Oligochaeta; Organic cultivation; Population density.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800019

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

Effects of soil management systems on soil microbial activity, bulk density and chemical properties
Provedor de dados: 86
Autores: Valpassos,Maria Alexandra Reis; Cavalcante,Eloiza Gomes Silva; Cassiolato,Ana Maria Rodrigues; Alves,Marlene Cristina.
The objective of this experiment was to study the effects of soil management systems on the bulk density, chemical soil properties, and on the soil microbial activity on a Latossolo Vermelho distrófico (Oxisol). Soil samples were collected from plots under the following management conditions: a) natural dense "cerrado" vegetation (savanna); b) degraded Brachiaria decumbens pasture, 20 years old; c) no-tillage treatment with annual crop sequence (bean, corn, soybean and dark-oat in continuous rotation), 8 years old; d) conventional tillage treatment with crop residues added to the soil, and annual crop sequence, 10 years old. The continuous use of no-tillage system resulted in an increase in microbial biomass and decrease in soil basal respiration,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil chemicophysical properties; Biomass; Soil deterioration; Soil conservation.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001001200011

Stalk and sucrose yield in response to nitrogen fertilization of sugarcane under reduced tillage
Provedor de dados: 86
Autores: Fortes,Caio; Trivelin,Paulo César Ocheuze; Vitti,André César; Otto,Rafael; Franco,Henrique Coutinho Junqueira; Faroni,Carlos Eduardo.
The objective of this work was to evaluate the agroindustrial production of sugarcane (millable stalks and sucrose yield) after successive nitrogen fertilizations of plant cane and ratoons in a reduced tillage system. The experiment was carried out at Jaboticabal, SP, Brazil, on a Rhodic Eutrustox soil, during four consecutive crop cycles (March 2005 to July 2009). Plant cane treatments consisted of N-urea levels (control, 40, 80, and 120 kg ha-1 N + 120 kg ha-1 P2O5 and K2O in furrow application). In the first and second ratoons, the plant cane plots were subdivided in N-ammonium nitrate treatments (control, 50, 100, and 150 kg ha-1 N + 150 kg ha-1 K2O as top dressing over rows). In the third ratoon, N fertilization was leveled to 100 kg ha-1 in all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum; Agroindustrial production; Biomass; Crop residues; Subsoiling; Unburned cane.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000100012

Seasonal growth of "algodão-bravo" (Ipomoea carnea spp. fistulosa)
Provedor de dados: 86
Autores: Haase,Rainer.
Ipomoea carnea spp. fistulosa, a native woody perennial, is capable of spreading rapidly over seasonally flooded grassland in the Brazilian Pantanal, South America's largest wetland, thus conflicting with the local cattle ranching. I. carnea is controlled by mowing at the onset of the rainy season, as close as possible before the seasonal flooding. Often, however, flooding begins after the plant has had enough time to re-sprout enabling it to survive. The objective of this study was to verify if Ipomoea carnea plant's production follows a seasonal cycle, and, if so, at which point in this cycle, the plant is most vulnerable to mechanical control measures. Seasonal dynamics of stem and leaf production of I. carnea were studied. The results showed that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Production; Pasture weed; Pantanal.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000200002

Survival of pathogens on soybean debris under no-tillage and conventional tillage systems
Provedor de dados: 86
Autores: Almeida,Álvaro Manuel Rodrigues; Saraiva,Odilon Ferreira; Farias,José Renato Bouças; Gaudêncio,Celso Almeida; Torres,Eleno.
A study was conducted in the subtropical area of Southern Brazil to determine the survival of pathogens in soybean residues under conventional and no-tillage cultivation systems from March to September of 1998 and 1999. The pathogens most frequently isolated were Colletotrichum truncatum, Phomopsis spp., Cercospora kikuchii, Fusarium spp., Macrophomina phaseolina, and Rhizoctonia solani. Other fungi isolated were Myrothecium roridum, Penicillium sp., Chaetomium sp., Epicoccum sp., Corynespora cassiicola and Trichoderma sp. The percent of survival of each pathogen varied according to the month and the year. Survival of C. truncatum, Phomopsis spp. and C. kikuchii were significantly reduced (p&lt;0.05) from the first to the last evaluation either on buried...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cultivation; Crop residues; Degradation; Biomass; Plant diseases.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001001000003

Biomasa acumulada e intercambio gaseoso en maíz proveniente de semilla de diferente tamaño bajo humedad favorable y restringida: (con 3 tablas)
Provedor de dados: 85
Autores: López-Santillán,José Alberto; Castro-Nava,Sergio; Trejo-López,Carlos; Mendoza-Castillo,Ma. Del Carmen; Ortiz-Cereceres,Joaquín.
Se evaluó la velocidad de germinación y el crecimiento de plántulas de maíz provenientes de semilla de dos diferentes tamaños para determinarlas diferencias en la producción de biomasa durante la etapa vegetativa y estimar los efectos de una condición diferente de disponibilidad de humedad sobre el estatus fisiológico de la plántula. Una mayor cantidad de biomasa en el endospermo y en el embrión de las semillas permitió una mayor disponibilidad de reservas durante la etapa posterior a la germinación y anterior a la emergencia, dando como resultado un mayor vigor inicial en las plántulas evaluadas, y en consecuencia una mayor acumulación de biomasa, tanto radical como aérea, durante la etapa vegetativa. La presencia de una restricción de humedad durante la...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Seed size; Seedling vigor; Biomass; Drought; Gas exchange.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100030

The nutrient accumulation pattern and cycling in natural secondary forests in North China: A case study from the Caijiachuan watershed, Shanxi Province
Provedor de dados: 85
Autores: Wei,TX; Zhang,XJ.
In order to examine the nutrient content, and the distribution and accumulation patterns of individual nutrients in the natural secondary forests (NSFs), sample NSF plots were selected in the Caijiachuan watershed on the Loess Plateau. On the basis of a comprehensive field inventory to the NSFs in Caijiachuan watershed, a 40 m × 40 m sample plot was selected as the representative plot. Each tree plant was then measured to select the standard tree in accordance with a diameter-scale. For measurement of the biomass in the above-ground part of the tree, it was divided into parts and measured. The study measured the concentration of the 5 major macronutrients (namely N, P, K, Ca and Mg) and the 8 major micronutrients (namely Cd, Fe, Mn, Cu, Zn, Pb, Ni and B)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Biological cycling; Loess Plateau; Microelements; Nutrient elements; China.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200001

Effect of prescribed fre on forage production and nutritive value of the perennial grass Saccharum griffithii
Provedor de dados: 85
Autores: Gul,B; Islam,M; Ahmad,S; Gul,S.
The effect of fre on growth and nutritive value of Saccharum griffithii Munro ex Boiss-ravennae (Linn.) Murr. hybrid, a low palatable perennial grass in the semi-arid region of the highlands of Balochistan, Pakistan, was evaluated during 2008 and 2009. Prescribed fire treatments were applied in February 2008 and 2009 at the dormant stage of vegetation. Different growth parameters (tiller height, tiller number/plant), forage production (fresh, dry) and nutritive value (crude protein, ash) were compared with control (unburnt) plots. Fire increased the number of tillers, and the fresh and dry forage production in both years. Fire also improved the crude protein contents. Prescribed fire at the dormant stage of vegetation can be used as a vegetation tool to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tiller growth; Fire; Biomass.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200025

Growth of clonal modules on Agropyron michnoi in the Songnen Plain of Northeast China
Provedor de dados: 85
Autores: Zhang,J; Zhou,C; Yang,YF.
Spatial expansion of clonal plants and growth of their modules are of concern in the field of plant ecology. After measuring a large number of samples, we analyzed the module components and the growth patterns of vegetatively propagated Agropyron michnoi clones in the Songnen Plain on Northeast China. The results showed that the plasticity of clonal growth was large; the coefficients of variation of both extensive areas and the quantitative characters of modules were more than 20%. The numbers of ramets, seedlings, and buds and the cumulative length of the rhizomes showed exponentially and linearly increasing patterns with increases of the area and the total number of modules. The biomass of each module, total number of modules and total biomass showed an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agropyron michnoi; Clonal growth; Vegetative propagation; Number of modules; Biomass.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000200021

Toxicity and accumulation of arsenic in wheat (Triticum aestivum L.) varieties of China
Provedor de dados: 85
Autores: Zhang,WD; Liu,DS; Tian,JC; He,FL.
Soil arsenic contamination becomes a potential agricultural and environmental hazard worldwide, and has been a serious problem for safe food production. A field experiment on soil contamination was conducted on four wheat varieties (Jimai, Gaoyou, Weimai and Wennong) in Eastern China, using 50 or 100 mg arsenic/kg soil. Biomass production and yield components were determined and arsenic concentrations were measured in plant tissues. Differential arsenic effects on wheat varieties were determined at maturity. Results showed that addition of arsenic significantly (p&lt;0.05) reduced root, stem and spike dry weight and yield components, which resulted in the decrease of grain yield per plant. Arsenic concentrations in plant tissues increased significantly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arsenic; Wheat (Triticum aestivum L.); Biomass; Yield components; Arsenic toxicity.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572009000200011

Sustainable management and use of a medicinal emblematic plant in Chile: Buddleja globosa Hope
Provedor de dados: 85
Autores: Wilckens,P; Fernández,MP; Gómez,M; Peña,I; Montenegro,G.
Buddleja globosa Hope is a well-known native, medicinal plant because of its digestive and cicatrizing properties. Due to the increasing domestic and international demand, B. globosa abundance and distribution in Chile has resulted in the intensive exploitation of the plant's natural habitat, without consideration of the plant's regenerative capacity. The main objective of this research was to establish the B. globosa growth cycle and model its regeneration cycle. This would allow for more productive, efficient and sustainable use and management of this species, thus ensuring its long-term conservation. We selected two study sites, one wild and another one cultivated. In each one, ten individuals were marked as control treatments, for further observations,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Growth cycle; Medicinal resource; Regeneration rate; Sustainable use.
Ano: 2013
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100012

Sodium sulfate exposure slows growth of native pecan seedlings
Provedor de dados: 85
Autores: Moreno-Izaguirre,E; Ojeda-Barrios,D; Avila-Quezada,G; Guerrero-Prieto,V; Parra-Quezada,R; Ruiz-Anchondo,T.
Pecan [Carya illinoensis (Wanngenh) K. Koch] is one of the most important nut crops in arid and semiarid regions of Mexico. Here, most pecans are grown in saline soils having poor permeability which are further degraded by the use of low-quality irrigation water. Salinity adversely affects both pecan nut quality and yield. Little work has been done to explore the physiological effects of salinity on native pecan trees. Here we examine physiological changes determined by exposure of pecan seedlings to sodium sulfate (Na2SO4) at four concentrations: 1000, 2000, 3000 and 4000 mg/L applied twice weekly over a 70 d period. Control plants were similarly irrigated but with water free of Na2SO4. The aim was to identify and quantify the putative salinity damage to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Carya illinoensis; Chlorophyll; Proline; Salinity.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100012

Weeds Biomass as Affected by Tillage Practices and Cropping Systems under a Semiarid Environment
Provedor de dados: 87
Autores: MEHMOOD-UL-HASSAN,; QAYYUM,A.; SHER,A.; TAHIR,M.I.; AZEEM,M.; FAREED,A.
ABSTRACT: Tillage practice has a significant role on weeds eradication and soil water conservation in crop production. Under semiarid agriculture, the monsoon rains (65%) are major source of water in Potohar, Pakistan, which can effectively be used mostly for winter crops production. To evaluate the impact of different tillage system for prevailing cropping systems and their weeds biomass under semiarid conditions, field experiment was conducted at the Arid University Research Farm Koont Rawalpindi (Pakistan) during crop growth seasons 2013-14 and 2014-15. Tillage systems as treatments were (a) three cultivations with a cultivator, as control treatment, (b) mold-board with two cultivations, (c) chisel-plough with two cultivations and (d) minimum tillage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tillage; Cropping systems; Weeds; Biomass; Semiarid.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100231

Weeds Associated to Different Genotypes of Cocoa in the Ecuadorian Amazon Region
Provedor de dados: 87
Autores: ALMEIDA,J.F.; GARCÍA,G.P.; PÉREZ,R.A.; BRITO,J.D.
ABSTRACT: This work was conducted in the Centro de Pesquisa, Pós-graduação e Preservação Amazônica (CIPCA), located in the Ecuadorian Amazon Region, with the goal to analyze the presence of weeds in promising clones of cocoa. The EET-95, EET-96 and EET-103 promising clones were evaluated, and the control sample was CCN-51. To do so, the relative frequency and distribution of the existing weeds were determined, as well as their biomass, which was statistically analyzed by the ANOVA of a factor and the HSD Tukey’s test. The presence of weeds was influenced by the studied genotypes, due to the fact that promising clones were associated to high frequency and distribution, such as Cyperus odoratus, Megathyrsus maximus, Sauvagesia erecta ssp. erecta. Other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Clones; Distribution; Frequency; Theobroma cacao.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100243

Estimating the Impacts of Storage Dry Matter Losses on Switchgrass Production
Provedor de dados: 31
Autores: Larson,   James A.; Mooney,   Daniel F.; English,   Burton C.; Tyler,   Donald D.
This poster estimates dry matter losses as a function of harvest method, storage treatment, and time in storage. We then calculate the cost to store switchgrass bales under alternate harvest method and storage treatment scenarios; and determine the breakeven harvest method and storage treatment as a function of biomass price and time in storage.
Tipo: Conference Paper or Presentation
Palavras-chave: Biomass; Bioenergy crops; Function form; Sustainable systems; Farm Management; Production Economics; Q10; Q42.
Ano: 2010
URL: http://purl.umn.edu/61530

Use of Agricultural Residue Feedstock In North Dakota Biorefineries
Provedor de dados: 31
Autores: Leistritz,   F. Larry; Hodur,   Nancy M.; Senechal,   Donald M.; Stowers,   Mark D.; McCalla,   Darold; Saffron,   Chris M.
Rising prices and uncertain supplies of petroleum, together with environmental concerns regarding fossil fuel combustion, have enhanced interest in biobased products and fuels. This study analyzes the feasibility of a multi-product biorefinery that uses wheat straw as feedstock to produce ethanol, electricity, and cellulose nanofibers. Nanofibers (nanowhiskers) would be used as reinforcements in a biobased nanocomposite material that could substitute for fiberglass in many applications. The growth of a biobased industry could have major economic development implications for the Great Plains/Midwest region.
Tipo: Journal Article
Palavras-chave: Biomass; Biomaterials; Cellulose nanofibers (CNFs); Economic development; Ethanol; Wheat straw; Agribusiness; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/90655

CRITICAL ECONOMIC FACTORS FOR SUCCESS OF A BIOMASS CONVERSION PLANT FOR AGRICULTURAL RESIDUE, YARD RESIDUE AND WOOD WASTE IN FLORIDA
Provedor de dados: 31
Autores: Granja,   Ivan R.; VanSickle,   John J.; Ingram,   Lonnie; Weldon,   Richard N.
This model evaluates the potential success of a cellulosic ethanol plant in Florida. Critical Economic factors of the plant were simulated to assess the ability of this project. These critical factors include the feedstock to be used, the cost of the facility, transportation costs and the discount rate for the net present value (NPV). Results and observations are presented in this paper.
Tipo: Conference Paper or Presentation
Palavras-chave: Biofuels; Renewable energy; Cellulosic ethanol; Biomass; Agribusiness; Community/Rural/Urban Development; Crop Production/Industries; Financial Economics; Production Economics; Productivity Analysis; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 2010
URL: http://purl.umn.edu/56442

The Trade-off between Bioenergy and Emissions When Land Is Scarce
Provedor de dados: 31
Autores: Kauffman,   Nathan S.; Hayes,   Dermot J.
Agricultural biofuels require the use of scarce land, and this land has opportunity cost. We explore the objective function of a social planner who includes a land constraint in the optimization decision to minimize environmental cost. The results show that emissions should be measured on a per acre basis. Conventional agricultural life cycle assessments for biofuels report carbon emissions on a per gallon basis, thereby ignoring the implications of land scarcity and implicitly assuming an infinite supply of the inputs needed for production. Switchgrass and corn are then modeled as competing alternatives to show how the inclusion of a land constraint can influence life cycle rankings and alter policy conclusions.
Tipo: Working or Discussion Paper
Palavras-chave: Biofuels; Biomass; Energy policy; Land use; Life cycle analysis.; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/98626

Market Interactions, Farmer Choices, and the Sustainability of Growing Advanced Biofuels
Provedor de dados: 31
Autores: Jiang,   Yong; Swinton,   Scott M.
Advanced biofuels such as cellulosic ethanol are of great interest for their potential to supply a significant portion of U.S. fuel needs plus advantages over corn grain-based ethanol.  The sustainability of agriculture-based advanced biofuels depends on how farmers would respond in providing biomass feedstock, yet economic behavior by farmers has been under recognized by the science community.  Focusing on markets and policy incentives, this research shows that farmers are unlikely to convert current grain cropland to grow a dedicated cellulosic biomass crop such as switchgrass.  However, the financial incentives to harvest cellulosic biomass provided by the 2008 farm bill may stimulate corn production due to demand for corn grain for feed and ethanol and...
Tipo: Working or Discussion Paper
Palavras-chave: Biomass; Energy; Advanced biofuels; Corn; Land use; Switchgrass; Cellulosic ethanol; Environmental Economics and Policy; Production Economics; Resource /Energy Economics and Policy; Q42; Q12.
Ano: 2008
URL: http://purl.umn.edu/43634

Integrative Investment Appraisal of a Lignocellulosic Biomass-to-Ethanol Industry
Provedor de dados: 31
Autores: Tembo,   Gelson; Epplin,   Francis M.; Huhnke,   Raymond L.
While theoretically more efficient than starch-based ethanol production systems, conversion of lignocellulosic biomass to ethanol is not without major challenges. A multi-region, multi-period, mixed integer mathematical programming model encompassing alternative feedstocks, feedstock production, delivery, and processing is developed. The model is used to identify key cost components and potential bottlenecks, and to reveal opportunities for reducing costs and prioritizing research. The research objective was to determine for specific regions in Oklahoma the most economical source of lignocellulosic biomass, timing of harvest and storage, inventory management, biorefinery size, and biorefinery location, as well as the breakeven price of ethanol, for a...
Tipo: Journal Article
Palavras-chave: Biomass; Biorefinery location; Ethanol; Integrative investment appraisal; Logistics; Mixed integer programming; Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/31070

The Economic Impacts of Bioenergy Crop Production on U.S. Crop Production
Provedor de dados: 31
Autores: Torre Ugarte,   Daniel de la; Walsh,   Marie E.; Shapouri,   Hosein; Slinsky,   Stephen P.
In  response  to  energy  security  concerns,  alternative  energy  programs  such  as  biomass  energy  systems  are  being developed to provide energy in the 21st century. For the biomass industry to expand, a variety of feedstocks will need to be utilized. Large scale production of bioenergy crops could have significant impacts on the United States agricultural sector in terms of quantities, prices and production location of traditional crops as well as farm income. Though a number of scenarios were examined to study the impact of bioenergy crop production on the agricultural sector, two cropland scenarios are presented in this report. Under the wildlife management scenario, the analysis indicates that, at $30/dry  ton  (dt)  for  switchgrass,...
Tipo: Report
Palavras-chave: Alternative crops; Bioenergy crops; Biomass; Conservation Reserve Program; Crop acreage shifts; Crop budgeting; Economic feasibility; Economic impact; Hybrid poplars; Hybrid willow; POLYSYS; Switchgrass; Crop Production/Industries; Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/33997

BIOREFINERIES USING AGRICULTURAL RESIDUE FEEDSTOCK IN THE GREAT PLAINS
Provedor de dados: 31
Autores: Leistritz,   F. Larry; Hodur,   Nancy M.; Senechal,   Donald M.; Stowers,   Mark D.; McCalla,   Darold; Saffron,   Chris M.
Rising prices and uncertain supplies of petroleum, together with environmental concerns regarding fossil fuel combustion, has enhanced interest in biobased products and fuels. The work reported here analyzes the feasibility of a multi-product biorefinery using wheat straw as feedstock that produces ethanol, electricity, and cellulose nanofibers. The nanofibers (nanowhiskers) would be used as reinforcements in a biobased nanocomposite material that could substitute for fiberglass in many applications. The analysis indicates that, at 2005 prices and costs, the biorefinery would be marginally profitable. Anticipated advances in bioprocessing technology would enhance profitability. The facility would also make a substantial contribution to the biorefinery site...
Tipo: Working or Discussion Paper
Palavras-chave: Biomass; Biomaterials; Ethanol; Wheat straw; Cellulose nanowhiskers (CNW); Economic development; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/7323

The Economics of Harvesting and Transporting Hardwood Forest Residue for Conversion to Fuel Ethanol:  A Case Study for Minnesota
Provedor de dados: 31
Autores: Petrolia,   Daniel R.
Forest residues are being considered as potential feedstock for a biomass-to-ethanol facility in Minnesota (USA), using residues from major wood-producing counties in Minnesota, Wisconsin, and Michigan.  Results indicate that marginal residue costs delivered to a conversion facility would be $56-80/Mg for a small (95-189 MM liters) plant, and about $81/Mg for a larger (379 MM liters) plant.  Output beyond these levels would involve substitution of lower-cost market pulpwood as the plant feedstock because of relatively high marginal residue costs.  Sensitivity analysis indicates that either a 20-percent increase or decrease in the quantity of available residue would impact marginal cost estimates by no more than $15/Mg.
Tipo: Working or Discussion Paper
Palavras-chave: Biomass; Economics; Ethanol; Residue supply; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/14020

Avaliação da viabilidade técnica e econômica da utilização de biomassas como fonte energética alternativa em fornos industriais
Provedor de dados: 31
Autores: Lima,   Lilian Maluf de; Oliveira,   Ana Maria Kefalas; Carletti,   Paulo de Tarso Filho; Ferrari,   Renata Cristina; Caixeta,   Jose Vicente Filho.
This study, conducted along the year 2003, was held in the environment of a cement company plant located in the São Paulo State. That industry has used carbon black as predominant energetic source which besides resulting a huge emission of gases (CO and CO2) into the atmosphere, has been more expensive than some other alternatives of biomass sources. Taking into consideration the location of that plant, there was a large supply of available biomass to be used as alternative fuel for industrial ovens. Several biomasses were analyzed and it was concluded that the sugar cane bagasse and residues of wood (sawdust and woodchips) were the most appropriate alternatives to such an industry.
Tipo: Journal Article
Palavras-chave: Biomass; Energy; Transport; Optimization; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/55310

Choice of optimum feedstock portfolio for a cellulosic ethanol plant  – A dynamic linear programming solution
Provedor de dados: 31
Autores: Kumarappan,   Subbu; Ivanic,   Rasto.
When the lignocellulosic biofuels industry reaches maturity and many types of biomass sources become economically viable, management of multiple feedstock supplies – that vary in their yields, density (tons per unit area), harvest window, storage and seasonal costs, storage losses, transport distance to the production plant – will become increasingly important for the success of individual enterprises. The manager’s feedstock procurement problem is modeled as a multi-period sequence problem to account for dynamic management over time. The case is illustrated with a hypothetical 53 million annual US gallon cellulosic ethanol plant located in south west Kansas that requires approximately 700,000 metric dry tons of biomass. The problem is framed over 40...
Tipo: Conference Paper or Presentation
Palavras-chave: Cellulosic ethanol; Feedstock; Switchgrass; Miscanthus; Corn stover; Optimization; Biofuels; Biomass; Energy; Renewable; Agribusiness.
Ano: 2009
URL: http://purl.umn.edu/49407

Policies to Facilitate Conversion of Millions of Acres to the Production of Biofuel Feedstock
Provedor de dados: 31
Autores: Epplin,   Francis M.; Haque,   Mohua.
First-generation grain ethanol biofuel has affected the historical excess capacity problem in U.S. agriculture. Second-generation cellulosic ethanol biofuel has had difficulty achieving cost-competitiveness. Third-generation drop-in biofuels are under development. If lignocellulosic biomass from perennial grasses becomes the feedstock of choice for second- and third-generation biorefineries, an integrated system could evolve in which a biorefinery directly manages feedstock production, harvest, storage, and delivery. Modeling was conducted to determine the potential economic benefits from an integrated system. Relatively low-cost public policies that could be implemented to facilitate economic efficiency are proposed.
Tipo: Journal Article
Palavras-chave: Biomass; Bio-oil; Cellulosic; Drop-in fuels; Ethanol; Land-lease contract; Lignocellulosic; Pyrolysis; Switchgrass; Resource /Energy Economics and Policy; Q16; Q18; Q15; Q42.
Ano: 2011
URL: http://purl.umn.edu/113532

Farmers’ Willingness to Grow Switchgrass as a Cellulosic Bioenergy Crop: A Stated Choice Approach
Provedor de dados: 31
Autores: Fewell,   Jason E.; Bergtold,   Jason S.; Williams,   Jeffery R.
Farmers’ Willingness to Grow Switchgrass as a Cellulosic Bioenergy Crop:  A Stated Choice Approach  Agriculture’s role as a source of feedstocks in a potential lignocellulosic-based biofuel industry is a critical economic issue. Several studies have assessed the technical feasibility of producing bioenergy crops on agricultural lands. However, few of these studies have assessed farmers’ willingness to produce or supply bioenergy crops or crop residues. Biomass markets for bioenergy crops do not exist, and developing these markets may take several years. Therefore, an important, yet unaddressed question is under what contractual or pricing arrangements farmers will grow biomass for bioenergy in these nascent markets.  The purpose of this paper is to examine...
Tipo: Conference Paper or Presentation
Palavras-chave: Biofuels; Cellulosic; Biomass; Switchgrass; Farmers; Willingness to Pay; Crop Production/Industries; Production Economics; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/109776

INTEGRATING BIOMASS TO PRODUCE HEAT AND POWER AT ETHANOL PLANTS
Provedor de dados: 31
Autores: De Kam,   Matthew J.; Morey,   R. Vance; Tiffany,   Douglas G.
Published in:  Applied Engineering in Agriculture, Vol. 25(2): 227‐244
Tipo: Journal Article
Palavras-chave: Biomass; Renewable; Sustainable; Model; Gasification; Combustion; Emissions; Ethanol production; Combined heat and power; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/93631

A mezőgazdaságban keletkező biomassza energetikai hasznosításának agrárgazdasági megközelítése
Provedor de dados: 31
Autores: Molnar,   Andras.
A gazdálkodás ökonómiai kérdéseivel foglalkozók számára a piaci csere híján fontos feladat az externáliák minél szélesebb körű számszerűsítése, mivel csak a társadalom számára jelentkező összes költség és haszon figyelembevételével lehet megítélni a mindenkori agrárpolitikát. Egyre fontosabb az, hogy milyen agrárpolitikai eszközökkel oldhatók meg a liberalizált kereskedelemmel szembeni elvárások és a nem-termék jellegű javak társadalmilag optimális kibocsátása. Ebben a kettős elvárásban a földtulajdon és földhasználat szétválása előnytelen.   -------------------------------------------    In the absence of exchange in the market, researchers into economic aspects of farming place a high emphasis on quantifying externalities to the maximum extent possible....
Tipo: Journal Article
Palavras-chave: Externáliák; Biomassza; Energetikai felhasználás; Földhasználat; Méret-; Skála- és választékgazdaságosság; Externalities; Biomass; Use for energy production; Land use; Economies of scale; Volume and choice; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/92533

The Economic Feasibility of Using Georgia Biomass for Electrical Energy Production
Provedor de dados: 31
Autores: Shumaker,   George A.; Luke-Morgan,   Audrey S.; McKissick,   John C.
This study investigates the potential for using biomass for the production of electricity in Georgia. The volume, important characteristics, and delivered costs per unit of energy are estimated for various locally produced biomass. Production of synthetic fuels using both pyrolysis and gasification technologies is investigated as potential means for converting biomass into electricity. Capital and operating costs for each of these two technologies are projected across three different scales of production. Estimated costs per unit of electricity generated are determined. It appears, under the conditions modeled, these technologies are not cost competitive with currently used technologies. Significant subsidies would be needed to induce the adoption of these...
Tipo: Journal Article
Palavras-chave: Bio-electricity; Bio-feedstocks; Biomass; Cost; Electricity; Agribusiness; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/90661

The Economics of Harvesting and Transporting Corn Stover for Conversion to Fuel Ethanol: A Case Study for Minnesota
Provedor de dados: 31
Autores: Petrolia,   Daniel R.
Corn stover harvest and transport cost functions were estimated for two harvest operations for a proposed biomass-to-ethanol conversion facility located in southern Minnesota, USA.  This work presents an alternative methodology to estimating corn stover quantities and harvest costs at the county level, taking into account county-specific yields, transportation distances, erosion constraints, machinery specifications, and other key variables.  Monte Carlo simulation was also used to estimate the probability distribution of costs under alternative assumption on key parameters whose values vary widely in the literature.  Marginal stover cost for 50MM gal/year of ethanol output was estimated at $54/dt ($0.77/gal ethanol) for the more intensive harvest method...
Tipo: Working or Discussion Paper
Palavras-chave: Biomass; Corn stover; Economics; Ethanol; Lignocellulose; Monte Carlo; Crop Production/Industries; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/14213

Economic Analysis of Cellulase Production by Clostridium thermocellum in Solid State and Submerged Fermentation
Provedor de dados: 31
Autores: Zhuang,   Jun; Marchant,   Mary A.; Nokes,   Sue; Strobel,   Herbert.
Dependence on foreign oil remains a serious issue for the U.S. economy. Additionally, automobile emissions related to petroleum-based, fossil fuel has been cited as one source of environmental problems, such as global warming and reduced air quality. Using agricultural and forest biomass as a source for the biofuel ethanol industry, provides a partial solution by displacing some fossil fuels. However, the use of high cost enzymes as an input is a significant limitation for ethanol production. Economic analyses of cellulase enzyme production costs using solid state cultivation (SSC) are performed and compared to the traditional submerged fermentation (SmF) method. Results from this study indicate that the unit costs for the cellulase enzyme production are...
Tipo: Working or Discussion Paper
Palavras-chave: Biomass; Enzyme production; Ethanol; Solid state fermentation; Submerged fermentation; Resource /Energy Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/31982

Optimizing Ethanol Production in North Dakota
Provedor de dados: 31
Autores: Taylor,   Richard D.; Koo,   Won W.
A spatial equilibrium model based on a non-linear mathematical programming algorithm was developed to determine the optimal number, location, and size of cellulose ethanol plants for North Dakota. The objective function of the model is to minimize processing cost of biomass for ethanol and the transportation cost of shipping biomass to processing plants and ethanol to blending facilities. A heuristic approach, combined with a spatial equilibrium model, was used to determine the optimal number, location and size of biomass processing plants.
Tipo: Report
Palavras-chave: Cellulosic ethanol; Biomass; Mathematical programming; Heuristic; Production costs; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/91841

BIOMASS FOR ELECTRICITY AND PROCESS HEAT AT ETHANOL PLANTS
Provedor de dados: 31
Autores: Morey,   R. Vance; Tiffany,   Douglas G.; Hatfield,   Dennis L.
Published in:  Applied Engineering in Agriculture,  Vol. 22(5): 723-728
Tipo: Journal Article
Palavras-chave: Biomass; Process heat; Ethanol production; Electricity; Combined heat and power; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/93630

PERSPECTIVAS DE OBTENCIÓN DE ENERGÍA RENOVABLE DE LA BIOMASA DEL ESTIÉRCOL DEL GANADO LECHERO EN LA REGIÓN CENTRO-SUR DE CHIHUAHUA
Provedor de dados: 31
Autores: Rivas Lucero,   Bertha Alicia; Zuniga Avila,   Gabriel; Saenz Solis,   Jorge Iram; Guerrero Morales,   Sergio; Segovia Lerma,   Armando; Morales Morales,   Hugo Armando.
Currently almost all energy is provided by fossil fuels that increase greenhouse gas emissions contributing to global warming. These emissions can be reduced with the use of renewable energy produced from biomass such a livestock manure. The manure is raw material for production of electricity and thermal energy. Anaerobic digestion of waste can reduce emissions by capturing methane, a greenhouse gas produced by waste in facilities large and small scale. The South Central region of the state of Chihuahua has the potential for renewable energy production from biomass and waste are approximately 58,000 head of cattle, valuing a daily output of 2,900 m3 of sewage and 10,000 m3 of waste water can cause environmental problems. The estimated biogas production...
Tipo: Article
Palavras-chave: Anaerobic digester; Biogas; Biomass; Renewable energy.; Agribusiness.
Ano: 2012
URL: http://purl.umn.edu/120496

ALTERNATIVAS PARA A GERAÇÃO DE ENERGIA RENOVÁVEL NO BRASIL: A OPÇÃO PELA BIOMASSA
Provedor de dados: 31
Autores: Marconato,   Mariane Silva; Santini,   Giuliana Aparecida.
Durante muito tempo, os recursos fósseis e hídricos foram os grandes propulsores da civilização e da economia. O Brasil também se apoiou nessas fontes energéticas para o desenvolvimento de atividades industriais, agrícolas, de serviços e da própria sociedade. Entretanto, vive-se hoje uma crise no abastecimento energético, em função da problemática geopolítica, econômica e ambiental em torno da extração e comercialização desses recursos, uma vez que possuem ainda, caráter não renovável, portanto, finito na natureza. Os escassos investimentos governamentais e a abertura econômica do setor energético resultou no fim do monopólio energético, o que favoreceu a implantação de sistemas alternativos, na maioria, advindos da biomassa. Dentre esses, destaca-se a...
Tipo: Conference Paper or Presentation
Palavras-chave: Energia; Fóssil; Hídrico; Renovável; Biomassa; Energy; Fossil; Water; Renewable; Biomass; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/112629

A Global Model for Agriculture and Bioenergy: Application to Biofuel and Food Security in Peru and Tanzania
Provedor de dados: 31
Autores: Elbehri,   Aziz; McDougall,   Robert; Horridge,   Mark.
This paper describes a global model for agriculture and bioenergy (GLOMAB) that incorporates biomass, biofuels and bioelectricity sectors into the GTAP-Energy model by expanding the global GTAP database, production and consumption structures. Biofuels are separated between first- generation (sugar ethanol, starch ethanol) and second- generation (cellulosic ethanol) biofuels and associated biomass feedstocks (maize, sugar cane, crop residues, woody biomass). Beside biofuels, the model also incorporates bioelectricity (as separate form conventional electricity) which competes for the same biomass feedstocks with cellulosic ethanol sector (agricultural residues, woody biomass). With this broad-based representation of the bioenergy system likely to prevail...
Tipo: Conference Paper or Presentation
Palavras-chave: Biofuels; Renewable Energy; Biomass; Agricultural Markets; Computable General Equilibrium (CGE); Food Security and Poverty; Resource /Energy Economics and Policy; C68; Q18; Q42; R14.
Ano: 2009
URL: http://purl.umn.edu/51914

A megújuló energiaforrások szerepe és hatásai a hazai agrárgazdaságban
Provedor de dados: 31
Autores: Magda,   Robert.
Összességében megállapítható, hogy Magyarországon az elmúlt fél évszázadban rendkívül megnőtt az energiafelhasználás, ami többnyire a fosszilis tüzelőanyagokból nyert energiára alapult. Ez arra készteti a jelen és a jövő kor társadalmát, hogy törekedjen a rendelkezésre álló megújuló energiaforrások felhasználásának előtérbe helyezésére, melyek használata a fenntarthatóság és a versenyképesség szempontjából sem elhanyagolható, hiszen ismert, hogy napjaink egyik kritikus költségtényezőjét adják az energiaköltségek. A megoldásban jelentős szerep hárul a vidéki társadalmakra, mert hiába történik az energiafelhasználás zöme az urbanizált területeken, az energia-előállítás, kitermelés a vidékre koncentrálódik. A fosszilis tüzelőanyagok korlátaiból adódóan új...
Tipo: Article
Palavras-chave: Energiafüggőség; Megújuló energiahordozók; Biomassza; Foglalkoztatás; Energy dependence; Renewable energy; Biomass; Employment; Community/Rural/Urban Development; Labor and Human Capital.
Ano: 2011
URL: http://purl.umn.edu/119936

Feasibility Assessment of Biomass Harvesting Cooperative
Provedor de dados: 31
Autores: Basnet,   Arjun; Kenkel,   Philip L.
The paper summarizes the harvesting and transportation costs of biomass in an individual producer’s framework versus a cooperative framework using a feasibility template developed in MS Excel. The cost is compared between individual producer having 1000 acres of land and a cooperative with five members each having 1000 acres of land. The estimated total cost per ton for harvesting biomass and transporting it to a warehouse 20 mile far is $25.53 for individual producer and $18.00 for cooperative. The mowing, raking and baling cost per ton is estimated to be $5.71, $3.94 and $11.16 respectively for individual producer and $4.97, $2.00 and $5.85 respectively for cooperative.
Tipo: Presentation
Palavras-chave: Biomass; Switchgrass; Harvesting; Transportation; Cooperative; Agricultural and Food Policy; Financial Economics; Production Economics; Resource /Energy Economics and Policy.
Ano: 2012
URL: http://purl.umn.edu/119781

Risk and the decision to produce biomass crops: a stochastic analysis
Provedor de dados: 31
Autores: Clancy,   Daragh; Breen,   James P.; Thorne,   Fiona S.; Wallace,   Michael T.
There is increasing interest in biomass crops as an alternative farm enterprise. However, given the relatively low uptake of these crops in Ireland, there is limited information concerning the risk associated with their production and its potential impact on returns. The uncertainty surrounding risky variables such as the costs of production, yield level, price per tonne and opportunity cost of land make it difficult to accurately calculate the returns to biomass crops. Their lengthy production lifespan may only serve to heighten the level of risk that affects key variables. A stochastic budgeting model is used to calculate the returns from willow and miscanthus. The opportunity cost of land is accounted for through the inclusion of the foregone returns...
Tipo: Conference Paper or Presentation
Palavras-chave: Biomass; Bioremediation; Stochastic Budgeting; NPV; SERF; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/91955

Is Switchgrass Yield Response to Nitrogen Fertilizer Dynamic? Implications for Profitability and Sustainability at the Farm Level
Provedor de dados: 31
Autores: Mooney,   Daniel F.; Roberts,   Roland K.; English,   Burton C.; Larson,   James A.; Tyler,   Donald D.
Revised version of the paper submitted 2/11/2010
Tipo: Conference Paper or Presentation
Palavras-chave: Biomass; Energy Crops; Sequential Inputs; West Tennessee; Crop Production/Industries; Farm Management; Production Economics; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/57623

Economic Competitiveness of Bioenergy Production and Effects on Agriculture of the Southern Region
Provedor de dados: 31
Autores: English,   Burton C.; Torre Ugarte,   Daniel de la; Walsh,   Marie E.; Hellwinckel,   Chad M.; Menard,   R. Jamey.
The economic competitiveness of biobased industries is discussed by comparing the South relative to other regions of the United States and biomass as a feedstock source relative to fossil fuels such as coal and petroleum.  An estimate of the biomass resource base is provided.  Estimated changes in the agricultural sector over time resulting from the development of a large-scale biobased industry are reported, and a study on the potential to produce electricity from biomass compared with coal in the southern United States is reviewed.  A biobased industry can increase net farm income and enhance economics development and job creation.
Tipo: Journal Article
Palavras-chave: Biobased industries; Biomass; Cofire; Energy; Ethanol; Lignocellulosic; Resource /Energy Economics and Policy; Q42; Q41; R15; Q11.
Ano: 2006
URL: http://purl.umn.edu/43775

MANEJO SUSTENTÁVEL DA CAATINGA PARA PRODUÇÃO ECONÔMICA DE BIOMASSA VEGETAL
Provedor de dados: 31
Autores: Menezes,   Marcelo Oliveira Teles De; Araujo,   Rogerio Cesar Pereira.
Devido às suas dimensões continentais e às condições ambientais dos trópicos (temperatura e umidade elevadas), o Brasil tem alta biodiversidade e grande potencial de produção de biomassa. A biodiversidade oferece uma grande variedade de produtos que podem ser explorados, tais como a biomassa vegetal, que pode ser utilizada como madeira para móveis e construção civil, fabricação de celulose (papel), lenha, carvão, combustível além de servir de matéria-prima para artesanato. Apesar disso, esse potencial produtivo é subutilizado no Brasil. O setor florestal brasileiro não aproveita sua biodiversidade, utilizando apenas monoculturas de espécies exóticas. Sua produção madeireira é pequena, considerando que se trata do país com a 2ª maior extensão de florestas...
Tipo: Conference Paper or Presentation
Palavras-chave: Caatinga; Gestão; Biomassa; Sustentabilidade; Management; Biomass; Sustainability; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/109066

PRELIMINARY FEASIBILITY ANALYSIS FOR AN INTEGRATED BIOMATERIALS AND ETHANOL BIOREFINERY USING WHEAT STRAW FEEDSTOCK
Provedor de dados: 31
Autores: Leistritz,   F. Larry; Senechal,   Donald M.; Stowers,   Mark D.; McDonald,   William F.; Saffron,   Chris M.; Hodur,   Nancy M.
Biobased products and fuels appear to have a very bright future.  A consortium led by NDSU is currently engaged in a project that would use cellulose nanofibers derived from wheat straw to make a product that could substitute for fiberglass and plastics in many applications, including automotive parts.  The work described here analyzes the economic value of producing cellulose nanowhiskers (CNW) as a co-product in an ethanol biorefinery.  An ASPEN Plus-based process model was developed to evaluate ethanol production from wheat straw.  The base case model generated 54.418 million gallons per year (MGPY) of denatured ethanol, using approximately 900,000 tons per year of wheat straw feedstock.  The capital cost was estimated at $185 million.  Total operating...
Tipo: Working or Discussion Paper
Palavras-chave: Biomass; Biomaterials; Ethanol; Wheat straw; Cellulose nanowhiskers (CNW); Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/23500

BIOENERGIE AS A SOURCE OF INCOME OF AGRICULTURAL ENTERPRISES
Provedor de dados: 31
Autores: Makarchuk,   Oksana; Hockmann,   Heinrich; Lissitsa,   Alexej.
Enterprise activity is based on maximization of profit to increase the volume of own capital, to expand manufacture and to guarantee the earning of profit for the long-term period. Therefore everyone searches for new sources of the income by means of which it is possible to maximize cost of the made product. One of new sources of the income in agriculture is a cultivation of agricultural crops for the energy, heat, fuel (biofuel) manufacture. In this "discussion paper" the market is examined for biofuel, as well as their competitiveness is analyzed in comparison to mineral fuels. Germany takes the lead positions on manufacture and use of biofuel among the countries of the European Union and Ukraine has a big potential on the agricultural commodities market...
Tipo: Working or Discussion Paper
Palavras-chave: Биотопливо; Биоэтанол; Биомасса; Возобновляемые источники энергии; Конкурентоспособность; Спрос и предложение.Biokraftstoff; Bioethanol; Biomasse; Erneubare Energien; Wettbewerbsfähigkeit; Angebot und Nachfrage.Biofuel; Bioethanol; Biomass; Renewed energy sources; Competitiveness; Supply and demand.; Agribusiness; Environmental Economics and Policy; Farm Management; Productivity Analysis; Resource /Energy Economics and Policy; Q12; Q27.
Ano: 2007
URL: http://purl.umn.edu/91735

ECONOMICS OF BIOMASS GASIFICATION/COMBUSTION AT FUEL ETHANOL PLANTS
Provedor de dados: 31
Autores: Tiffany,   Douglas G.; Morey,   R. Vance; De Kam,   Matthew J.
Published in Applied Engineering in Agriculture,  Vol. 25(3): 391‐400
Tipo: Journal Article
Palavras-chave: Ethanol; Biomass; Economics; CHP; Emissions; Process heat; Electricity production; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/93632

BIO-ENERGY FROM WINERY BY-PRODUCTS: A NEW MULTIFUNCTIONAL TOOL FOR THE ITALIAN WINE DISTRICTS
Provedor de dados: 31
Autores: Begalli,   Diego; Codurri,   Stefano; Gaeta,   Davide.
This paper aims to investigate if the legislation will allow the production of energy from winery by-products and how this can contribute to multifunctionality of the wine makers’ income. A medium size winery was selected and an anaerobic digestor process was simulated using the company’s data. The main methods of financial evaluation were studied to create information to see if the project concepts were valid. The results highlight the positive level of earnings that the project will generate due to the high level of methane included in the pressings that could be transformed in energy, the short period needed for obtaining methane and the recent substantial level of government support both in Green Certificates and financing of the initial cost of the...
Tipo: Conference Paper or Presentation
Palavras-chave: Biomass; Winery by-products; Multifunctionality; Energy; Wine district; Agribusiness; Community/Rural/Urban Development; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/57492

The Economics Of Growing And Delivering Cellulosic Feedstocks In The Beaumont, Texas Area
Provedor de dados: 31
Autores: Fumasi,   Roland J.; Richardson,   James W.; Outlaw,   Joe L.
We estimate the contract prices that must be paid to grow cellulosic energy crops, and the costs of harvesting and transporting those crops in the Beaumont, TX area. Results indicate that the delivered price would range between $54 and $101 per ton of dry matter depending on the specific crop.
Tipo: Conference Paper or Presentation
Palavras-chave: Renewable fuels; Biofuels; Alternative fuels; Cellulosic; Biomass; Feedstock; Monte Carlo simulation; Resource /Energy Economics and Policy; Q12; Q42.
Ano: 2008
URL: http://purl.umn.edu/6788

Sustainability of Corn Stover Harvest for Biomass
Provedor de dados: 31
Autores: Sesmero,   Juan P.
Off-farm demand for crop residues is expected to grow as bioenergy policies become effective. Demand for residues will provide farmers with an additional source of revenue but it may also trigger losses in soil organic carbon and increases in fertilizer application. This study develops a dynamic economic model of stover harvest that permits conceptualization and quantification of these potential tradeoffs. We parameterize our model based on publicly available studies of soil biophysical relationships in the Corn Belt. Under these parameter values and 2010 corn and fertilizer prices harvesting stover is not economically convenient at prices below $53 per dry ton of stover. Results suggest that the rate of stover harvest may be quite sensitive and negatively...
Tipo: Conference Paper or Presentation
Palavras-chave: Stover supply; Biomass; Soil productivity; Soil organic carbon; Nitrogen; Environmental Economics and Policy; Farm Management; Land Economics/Use; Resource /Energy Economics and Policy; C61; Q12; Q24; Q42; Q53.
Ano: 2011
URL: http://purl.umn.edu/103765

Valuing the risk associated with willow and miscanthus relative to conventional agricultural systems
Provedor de dados: 31
Autores: Clancy,   Daragh; Breen,   James P.; Butler,   Anne Marie; Thorne,   Fiona S.; Wallace,   Michael T.
The agronomic characteristics of willow and miscanthus make these crops highly susceptible to risk. This is particularly true in a country such as Ireland which has limited experience in the production of these crops. Issues such as soil and climate suitability have as yet to be resolved. The lengthy production lifespan of energy crops only serve to heighten the level of risk that affects key variables. The uncertainty surrounding the risk variables involved in producing willow and miscanthus, such as the annual yield level and the energy price, make it difficult to accurately calculate the returns of such a project. The returns from willow and miscanthus are compared with those of conventional agricultural enterprises using Stochastic Efficiency with...
Tipo: Conference Paper or Presentation
Palavras-chave: Biomass; SERF; Risk Premium; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 2008
URL: http://purl.umn.edu/43972

Agricultural Impacts of Biofuels Production
Provedor de dados: 31
Autores: Walsh,   Marie E.; Torre Ugarte,   Daniel de la; English,   Burton C.; Jensen,   Kimberly L.; Hellwinckel,   Chad M.; Menard,   R. Jamey; Nelson,   Richard G.
Analysis of the potential to supply 25% of projected 2025 U.S. transportation fuels indicates sufficient biomass resources are available to meet increased demand while simultaneously meeting food, feed, and export needs. Corn and soybeans continue to be important feedstocks for ethanol and biodiesel production, but cellulose feedstocks (agricultural crop residues, energy crops such as switchgrass, and forestry residues) will play a major role. Farm income increases, mostly because of higher crop prices. Increased crop prices increase the cost of producing biofuels.
Tipo: Journal Article
Palavras-chave: Biodiesel; Biofuels; Biomass; Cellulose feedstocks; Crop residues; Ethanol; Forest residues; Switchgrass; Agribusiness; Resource /Energy Economics and Policy; O11; Q11; Q41.
Ano: 2007
URL: http://purl.umn.edu/6514

The Economic Impact of Global Climate Change on Mediterranean Rangeland Ecosystems: A Space-for-Time Approach
Provedor de dados: 31
Autores: Fleischer,   Aliza; Sternberg,   Marcelo.
Global Climate Change (GCC) can bring about changes in ecosystems and consequently in their services value.  Here we show that the urban population in Israel values the green landscape of rangelands in the mesic Mediterranean climate region and is willing to pay for preserving it in light of the expected increasing aridity conditions in this region.  Their valuation of the landscape is higher than that of the grazing services these rangelands provide for livestock growers.  These results stem form a Time-for-Space approach with which we were able to measure changes in biomass production and rainfall at four experimental sites along an aridity gradient.
Tipo: Working or Discussion Paper
Palavras-chave: Global climate change; Ecosystem; Choice modeling; Landscape; Biomass; Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/15001

Theory and Identification of Marginal Land and Factors Determining Land Use Change
Provedor de dados: 31
Autores: James,   Laura.
Biomass is being researched as a possible alternative to fossil sources of energy, in order to avoid externalities from fossil fuel use that affect the environment and the economy.  Some biomass-based energy production systems may produce unwanted externalities in their own right, such as increasing the production pressure on the agricultural land base, resulting in a rise in prices of food commodities.  Using marginal land for biomass production has been suggested as a solution.  However, the definition of what constitutes marginal land is poorly understood.  This paper provides a theoretical foundation for identification of marginal lands, and analyzes recent literature to assess how current usage of the term marginal correspond to the theoretical...
Tipo: Thesis or Dissertation
Palavras-chave: Biomass; Biofuel; Marginal lands; Extensive margin; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Production Economics; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy; Q15 Land Ownership and Tenure; Land Reform; Land Use; Irrigation; Agriculture and Environment; Q28 Government Policy; Q42 Alternative Energy Sources; Q48 Government Policy; R14 Land Use Patterns; R52 Land Use and Other Regulations.
Ano: 2010
URL: http://purl.umn.edu/98203

The potential for the production and use of biomass-based energy sources in Hungary
Provedor de dados: 31
Autores: Garay,   Robert; Kozak,   Anita; Nyars,   Levente; Radoczne Kocsis,   Terez.
Directive 2009/28/EC established a common framework for the use, production and promotion of energy from renewable sources. Subsequently, each European Union Member State was required to prepare a national Renewable Energy Action Plan (REAP) which specifies the share of energy from renewable sources to be consumed in transport, as well as in the production of electricity and heating, in 2020. The Hungarian REAP was published in December 2010. In order to identify what further steps are required to meet the targets set by the REAP, in this article we review the current situation and the potential in Hungary for the production and use of biomass, biogas and biofuel. We conclude that the annual quantity of required biomass is already available and it should...
Tipo: Article
Palavras-chave: Biomass; Biofuel; Biogas; Renewable Energy Action Plan; Hungary; Agricultural and Food Policy; Crop Production/Industries; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2012
URL: http://purl.umn.edu/122437

Using Cellulosic Ethanol to ‘Go Green’: What Price for Carbon?
Provedor de dados: 31
Autores: Miranowski,   John A.; Rosburg,   Alicia.
The revised Renewable Fuels Standard (RFS2) mandates that cellulosic biofuels be part of the liquid transportation fuel mix and contribute to reducing our carbon footprint.  Unfortunately, since no commercial cellulosic biorefinery exists and cellulosic biomass production is typically smaller scale than conventional crop production, limited knowledge exists of the actual costs of producing cellulosic biomass and converting it to cellulosic ethanol. Understanding of the implications of RFS2 requires a better understanding of the economics of producing cellulosic ethanol.  We use the Biofuel Breakeven model (BIOBREAK), a simple long run breakeven model that represents the feedstock supply system and biofuel refining process, along with estimates of the...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy; Resource /Energy Economics and Policy; Biofuels; Biomass; Cellulosic Ethanol; RFS2; Carbon.
Ano: 2010
URL: http://purl.umn.edu/61395

Deutschland – Energie-Corn-Belt Europas?
Provedor de dados: 31
Autores: Gomann,   Horst; Kreins,   Peter; Breuer,   Thomas.
The amendment of the Renewable Energy Sources Act (EEG) in 2004 has established an attractive support of using renewable resources for energy production, which since then has fuelled a rapid expansion of the competitive cropping of energy maize. The regionalised agricultural sector model RAUMIS was applied to calculate expected energy maize production as well as impacts on agricultural land use, production and income. Accordingly, the energy maize acreage rises up to about 1.8 mill hectares in the long run leading to substantial land use changes. The produced energy maize for biogas and power generation respectively is sufficient to provide circa 9% of the current German total electricity generation. In regard to the costs for the current consumer which...
Tipo: Journal Article
Palavras-chave: Renewable Energy Sources Act; Biomass; Energy maize; Agricultural sector model; Land-use; Resource /Energy Economics and Policy; Land Economics/Use.
Ano: 2007
URL: http://purl.umn.edu/96751

Az energetikai célú növénytermelés megítélése
Provedor de dados: 31
Autores: Szecsei,   Timea; Salamon,   Lajos.
A Nyugat-dunántúli Régió gazdálkodói körében vizsgáltuk az energetikai növények ismertségét, a termelés megítélését és az alacsony vállalkozói aktivitás okait. Avezetők csupán 7%-a hallott az összes megjelölt energianövényről, míg 11% még egyikkel sem találkozott. Azok a vezetők, akik bizonyos szintű ismerettel már rendelkeznek a vizsgált energianövényekről, nagyobb érdeklődést mutatnak az átlagnál. Az információk elérhetőségével a válaszadók 29%-a elégedetlen és 53%-a közepesen elégedett. Avárható támogatásoktól és a realizálható árbevételtől függ alapvetően az energianövények termelésére való vállalkozás, de fontos még a felvásárlási szerződés és a feldolgozóüzem távolsága is. Asaját üzemi felhasználás lehetősége csak közepes minősítést kapott. A...
Tipo: Journal Article
Palavras-chave: Megújuló energia; Biomassza; Energianövény-termelés; Nyugat-dunántúli Régió; Renewable energy; Biomass; Energy crop cultivation; Western Transdanubian Region; Crop Production/Industries; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/99192

Supporting Cellulosic Ethanol Biomass Production and its Impact on Land Use Conversion
Provedor de dados: 31
Autores: Wu,   Feng; Guan,   Zhengfei.
One of the problems facing the cellulosic ethanol industry is the cellulose material supply. The U.S. forestlands have considerable potential to become one of the main sources of biomass to meet the 2022 renewable fuel target. Focusing on the land exiting the Conservation Reserve Program (CRP), the article finds that few landowners are willing to convert their land to forestland after the CRP contract is expired. Our econometric estimates show the choice decision is responsive to net returns of land use alternatives, especially cropland. Two policy initiatives are suggested to provide direct incentives for land use change. The nested logit estimates are used to simulate landowners‘ responses to policy mechanism. The results show that subsidies can...
Tipo: Conference Paper or Presentation
Palavras-chave: Cellulosic Ethanol; Biomass; Land Use; The CRP; Forestland; Environmental Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/49451

The Trade-off Between Bioenergy and Emissions When Land Is Scarce
Provedor de dados: 31
Autores: Kauffman,   Nathan S.; Hayes,   Dermot J.
Agricultural biofuels require the use of scarce land, and this land has opportunity cost. We explore the objective function of a social planner who includes a land constraint in the optimization decision to minimize environmental cost. The results show that emissions should be measured on a per acre basis. Conventional agricultural life cycle assessments for biofuels report carbon emissions on a per gallon basis, thereby ignoring the implications of land scarcity and implicitly assuming an infinite supply of the inputs needed for production. Switchgrass and corn are then modeled as competing alternatives to show how the inclusion of a land constraint can influence life cycle rankings and alter policy conclusions.
Tipo: Conference Paper or Presentation
Palavras-chave: Biofuels; Biomass; Energy policy; Land use; Life cycle analysis; Agricultural and Food Policy; Environmental Economics and Policy; Q16; Q48; Q58.
Ano: 2011
URL: http://purl.umn.edu/103246

Producer Willingness to Supply Biomass: the Effects of Price and Producer Characteristics
Provedor de dados: 31
Autores: Altman,   Ira J.; Bergtold,   Jason S.; Sanders,   Dwight R.; Johnson,   Thomas G.
This paper presents research results based on data from two biomass producer surveys collected from mid Missouri and southern Illinois. Specific topics of interest include the effect of price and producer characteristics on willingness to supply, assets producers currently own and services they may be willing to provide if bioenergy industries develop. A series of censored tobit regressions are utilized to analyze willingness to supply results under three price scenarios. Marginal effects of a one dollar change in the biomass price are shown to increase the willingness to supply by 0.5 to 2 percent.
Tipo: Conference Paper or Presentation
Palavras-chave: Biomass; Willingness to supply; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/98804

Fitomassa epigéa da mata ciliar do rio Mogi-Guaçu, Itapira - SP
Provedor de dados: 88
Autores: MOREIRA-BURGER,DÉBORAH; DELITTI,WELINGTON B. C.
Este trabalho teve como objetivos estimar a fitomassa epigéa da mata ciliar do rio Mogi-Guaçu e determinar a melhor equação preditiva da fitomassa arbórea. O trabalho foi realizado num fragmento de mata localizado no município de Itapira - SP (22°21'S e 46°51'W). Foram delimitadas 12 parcelas de 25 m², para determinação da fitomassa através do método destrutivo. Os indivíduos arbóreos foram identificados e cortados ao nível do solo. De cada árvore, foram tomadas medidas de perímetro basal e altura. As folhas foram separadas manualmente dos ramos para determinação do peso fresco da porção foliar e lenhosa. A vegetação herbácea-arbustiva, de porte inferior a 1,3 m, existente em 3 m² de cada parcela, foi cortada ao nível do solo e tomadas as medidas de peso...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Biomass; Gallery forest.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000300011

Biomass and chemical composition of Nitella furcata subsp. mucronata var. mucronata f. oligospira (A. Braun) R. D. Wood (Chlorophyta, Characeae) in the littoral region of Ninféias Pond, São Paulo, Southeast Brazil
Provedor de dados: 88
Autores: Bueno,Norma Catarina; Bicudo,Carlos Eduardo de Mattos.
Temporal variation of Nitella furcata (Roxburgh ex Bruzelius) C. Agardh emend. R. D. Wood subsp. mucronata (A. Braun) R. D. Wood var. mucronata f. oligospira (A. Braun) R. D. Wood biomass and chemical composition were studied at the Ninféias Pond (23°38'18.9" S, 46°37'16.3" W), a mesotrophic reservoir located in the Parque Estadual das Fontes do Ipiranga Biological Reserve, Municipality of São Paulo, Southeast Brazil. Plants were collected monthly from October 1996 to October 1997 at three fixed stations of reservoir's littoral region. Charophyte biomass spatial distribution pattern did not vary significantly throughout the study period at all sampling stations. As to seasonal variation, the highest average values of the total alga biomass (98.35-266.06 g...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic macrophytes; Biomass; Charophyte; Chemical composition; Nitella.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000300013

Effects of nutrient impoverishment on phytoplankton biomass: a mesocosms experimental approach in a shallow eutrophic reservoir (Garças Pond), São Paulo, southeast Brazil
Provedor de dados: 88
Autores: Crossetti,Luciane O; Bicudo,Carlos E. de M.
Nutrient impoverishment in mesocosms was carried out in a shallow eutrophic reservoir aiming to evaluate the nutrient removal technique as a method for eutrophication reduction. Garças Pond is located in the Parque Estadual das Fontes do Ipiranga Biological Reserve situated in the southeast region of the municipality of São Paulo. Three different treatments were designed, each consisting of two enclosures containing 360 liters of water each. Mesocosms were made of polyethylene bags and PVC pipes, and were attached to the lake bottom. Treatment dilutions followed Carlson's trophic state index modified by Toledo and collaborators, constituting the oligotrophic, mesotrophic, and eutrophic treatments. Ten abiotic and 9 biological samplings were carried out...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Impoverishment; Mesocosms; Phosphorus; Phytoplankton.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000100009

Performance and color of broilers fed diets containing Rhodocyclus gelatinosus biomass
Provedor de dados: 89
Autores: Ponsano,EHG; Pinto,MF; Garcia-Neto,M; Lacava,PM.
The objective of this study was to evaluate the effect of different supplementation levels of Rhodocyclus gelatinosus biomass on the performance and pigmentation of broilers. Cobb broilers were raised in pens and were fed a sorghum-based diet until 35 days of age. At the 36th day of age, ninety-six birds were randomly distributed to four treatments consisting of experimental diets with different supplementation levels of Rhodocyclus gelatinosus biomass (0, 75, 150 and 300 ppm) added to the finisher basal diet, which were given for seven days. A completely randomized experimental design was used, with four treatments, four replicates and six broilers per parcel. Birds and diets were weighed at the 36th and at the 42nd day of age for performance analysis....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Broilers; Color; Performance; Rhodocyclus gelatinosus.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400008

Legumes and forage species sole or intercropped with corn in soybean-corn succession in midwestern Brazil
Provedor de dados: 90
Autores: Ceccon,Gessí; Staut,Luiz Alberto; Sagrilo,Edvaldo; Machado,Luís Armando Zago; Nunes,Danieli Pieretti; Alves,Valdecir Batista.
The feasibility of no-tillage in the Cerrado (Savanna-like vegetation of Brazil) depends on the production of sufficient above-ground crop residue, which can be increased by corn-forage intercropping. This study evaluated how above-ground crop residue production and yields of soybean and late-season corn in a soybean-corn rotation were influenced by the following crops in the year before soybean: corn (Zea mays L.) intercropped with Brachiaria (Urochloa) brizantha cv. Marandu, B. decumbens cv. Basilisk, B. ruziziensis, cv. comum., Panicummaximum cv. Tanzânia, sunn hemp (Crotalaria juncea L.), pigeon pea [Cajanus cajan (L.) Millsp]; sole corn, forage sorghum [Sorghum bicolor (L.) Moench (cv. Santa Elisa)], and ruzi grass. In March 2005, corn and forage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; No-till; Biomass; Above-ground crop residue.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100021

Potassium Fertilization of Eucalyptus in an Entisol in Low-Elevation Cerrado
Provedor de dados: 90
Autores: Gazola,Rodolfo de Niro; Buzetti,Salatiér; Teixeira Filho,Marcelo Carvalho Minhoto; Gazola,Raíssa Pereira Dinalli; Celestrino,Thiago de Souza; Silva,Alexandre Costa da; Silva,Paulo Henrique Müller da.
ABSTRACT Potassium (K) is one of the most highly accumulating nutrients in Eucalyptus and, consequently, is heavily exported by the harvesting of wood. Moreover, its availability in the soil in most Brazilian plantation areas is very low, especially in the regions of the Cerrado biome, which has soils with low natural fertility and marked water deficits, implying a lack of nutrient supply and, consequently, a less efficient water use. Our objective was to evaluate the effects of K fertilization on Eucalyptus biomass yield, the addition of nutrients to the soil by leaf deposition, nutrient use efficiency, and soil K availability. The experiment was conducted with clone I144 (Eucalyptus urophylla) in the municipality of Três Lagoas/MS, in a Neossolo...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Senescent leaf nutrients; Fertilization; Biomass; Macronutrients; Nutritional efficiency.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100505

Peach palm growth and heart-of-palm yield responses to liming
Provedor de dados: 90
Autores: Bovi,M. L. A.; Spiering,S. H.; Saes,L. A.
The effects of liming rates on growth and heart-of-palm yield of peach palm plants (Bactris gasipaes Kunth) were studied in a two-year field experiment conducted in Pariquera-Açu, State of Sao Paulo, Brazil. Soils in this region are allic (sub group Ultic Haplorthox), with base saturation ranging from 15 to 26 % of the cation exchange capacity (CEC). A randomized complete block design, with five rates of dolomitic limestone (0, 0.7, 4.7, 8.7, and 14.6 Mg ha-1) and five replications was utilized. Individual plots were composed of 80 plants but only the inner rows (24 plants) were used for data recording. Planting spacing was 2 x 1 m. There was a cubic effect of liming rates on growth and yield. Maximum heart-of-palm yield was estimated to be achieved at 4.3...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bactris gasipaes; Biomass; Limestone; Pejibaye.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832004000600009

Nitrogen efficiency in oat yield through the biopolymer hydrogel
Provedor de dados: 91
Autores: Scremin,Osmar B.; Silva,José A. G. da; Mamann,Ângela T. W. de; Mantai,Rubia D.; Brezolin,Ana P.; Marolli,Anderson.
ABSTRACT The retainers of water in the soil can favor nitrogen (N) use efficiency in oat yield. The aim of the study was to determine if the conditions of use of the biopolymer hydrogel increase the fertilizer-N use efficiency in oat yield in succession systems of high and low residual-N release. In each succession system (soybean/oat, corn/oat), two experiments were conducted in 2014 and 2015, one to quantify biomass yield and the other to estimate grain yield and lodging. The design was randomized blocks with four replicates in a 4 x 4 factorial scheme for hydrogel doses (0, 30, 60 and 120 kg ha-1), added in the furrow with the seed, and N fertilizer doses (0, 30, 60 and 120 kg ha-1) applied in the fourth-expanded-leaf stage. The use of hydrogel...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena sativa L.; Biodegradable; C/N ratio; Lodging; Biomass.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600379

Intensity and duration of water deficit on the pathosystem sugarcane x Meloidogyne incognita
Provedor de dados: 91
Autores: Quintela,Matheus P.; Pedrosa,Elvira M. R.; Willadino,Lilia; Rolim,Mario M.; Silva,Ênio F. de F. e; David,Mariana F. de L.
ABSTRACT This study aimed to evaluate the interaction between intensity and duration of water deficit (90, 56 and 22% of pot capacity [PC] for 30, 60 and 90 days under continuous stress) associated to the parasitism of the nematode Meloidogyne incognita on the growth of the sugarcane variety RB92579 and the activity of the enzymes catalase and ascorbate peroxidase. The experiment was conducted in completely randomized design in a 7 x 2 factorial scheme (seven water deficit treatments: control [90% PC], 56% PC for 30, 60 and 90 days, 20% PC for 30, 60 and 90 days; and two densities of M. incognita: 0 and 20000 eggs plant-1), with four replicates. The water stress corresponding to 56% PC for 30 or 60 days did not affect RB92579 development. The evaluated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enzyme activity; Biomass; Root-knot nematode; Saccharum.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000600581

Production and evaluation of briquettes from urban pruning residue and sugarcane bagasse
Provedor de dados: 91
Autores: Smith,Ana K. de G.; Alesi,Letícia S.; Varanda,Luciano D.; Silva,Diego A. da; Santos,Luis R. O.; Yamaji,Fábio M.
ABSTRACT The search for new alternatives in order to reuse residues is one way to minimize environmental impacts by promoting sustainable practices. This study analyzed the technical feasibility of briquettes production from urban pruning residue and sugarcane bagasse, turning them into a product with higher added value besides directing their use and reducing their improper disposal. Five treatments were studied from different ratios of the two residues: T1, T2, T3, T4 and T5, respectively made of 100% of urban pruning; 50% urban pruning and 50% sugarcane bagasse; 25% urban pruning and 75% sugarcane bagasse; 10% urban pruning and 90% sugarcane bagasse; 100% sugarcane bagasse. The materials were characterized physically, chemically and energetically....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergy; Biomass; Reusing waste.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200138

Water productivity using SAFER - Simple Algorithm for Evapotranspiration Retrieving in watershed
Provedor de dados: 91
Autores: Coaguila,Daniel N.; Hernandez,Fernando B. T.; Teixeira,Antônio H. de C.; Franco,Renato A. M.; Leivas,Janice F.
ABSTRACT The Cabeceira Comprida stream’s watershed, located in Santa Fé do Sul, São Paulo state, has great environmental importance. It is essential for supplying water to the population and generating surpluses for sewage dilution. This study aimed to evaluate the annual performance of the components of water productivity from Landsat-8 images of 2015, using the Simple Algorithm for Evapotranspiration Retrieving (SAFER), calculating the actual evapotranspiration (ETa), biomass (BIO) and water productivity (WP). The annual averages of ETa, BIO and WP were 1.03 mm day-1, 36.04 kg ha-1 day-1 and 3.19 kg m-3, respectively. The average annual values of ETa for land use and occupation were 1.40, 1.23, 1.05, 0.97 and 1.08 mm day-1 for the remaining forest (RF),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Evapotranspiration; Remote sensing; Typha.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000800524

Valorization of sunflower meal through the production of ethanol from the hemicellulosic fraction
Provedor de dados: 91
Autores: Tavares,Bruna; Sene,Luciane; Christ,Divair.
ABSTRACT Sunflower is among the major oil seeds crop grown in the world and the by-products generated during the seeds processing represent an attractive source of lignocellulosic biomass for bioprocesses. The conversion of lignocellulosic fibers into fermentable sugars has been considered as a promising alternative to increase the demand for ethanol. The present study aimed to establish the fermentation conditions for ethanol production by Scheffersomyces stipitis ATCC 58376 in sunflower meal hemicellulosic hydrolysate, through a 23 CCRD (Central Composite Rotational Design) factorial design. Under the selected conditions (pH 5.25, 29 ºC and 198 rpm) the final ethanol concentration was 13.92 g L-1 and the ethanol yield was 0.49 g g-1.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: By-product; Biomass; Xylose; Biofuel; Optimization.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001101036

Seasonal variation of macromedusae (Cnidaria) at North Bay, Florianópolis, southern Brazil
Provedor de dados: 103
Autores: Nogueira Júnior,Miodeli; Nagata,Renato Mitsuo; Haddad,Maria Angélica.
Seasonal variation of large medusae abundance and biomass was studied in the North Bay, Santa Catarina, southern Brazil (27°30'S, 48° 32'W), from February to December 2005. Collecting was conducted seasonally with the help of fishing bottom trawl in 30-minute sections (12 in summer, 18 in each of the remaining seasons) in six stations, totaling 66 samples. Eight species were found: the hydrozoans Aequorea sp., Olindias sambaquiensis Müller, 1861, and Rhacostoma atlantica L. Agassiz, 1850; the cubozoans Chiropsalmus quadrumanus (Müller, 1859) and Tamoya haplonema Müller, 1859, and the scyphozoans Aurelia sp., Chrysaora lactea Eschscholtz, 1829 and Lychnorhiza lucerna Haeckel, 1880. Capture rates were low, up to 38 indiv. ha-1, and only ~47% of the samples...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Chrysaora lactea; Jellyfish; Olindias sambaquiensis; Rhacostoma atlantica.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300009

Estimation of dry mass of caddisflies Phylloicus elektoros (Trichoptera: Calamoceratidae) in a Central Amazon stream
Provedor de dados: 103
Autores: Martins,Renato T.; Melo,Adriano S.; Gonçalves Jr,José F.; Hamada,Neusa.
Aquatic invertebrate biomass estimations are often important in ecological and biological studies. Biomass may be determined by regression models between body and case dimensions and dry mass. Using linear, exponential and power regressions we analyzed the relationship between body and case dimensions and the biomass of Phylloicus elektoros Prather, 2003. Furthermore, we used cross-validation to evaluate the predictions of our models and of the models developed for Phylloicus sp. from southeastern Brazil. We measured four body dimensions (head capsule width, interocular distance, body and pronotum length) of 152 larvae and two case dimensions (width and length) of 45 cases. Case width provided better fit with biomass than case length in all model classes....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic insects; Allometric relationship; Biomass; Body dimensions; Case dimensions.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000400005

Compensatory growth of Malaysian prawns reared at high densities during the nursery phase
Provedor de dados: 96
Autores: Marques,H.L.A.; Lombardi,J.V.
The objective of this work was to verify the occurrence of compensatory growth in Malaysian prawn (Macrobrachium rosenbergii) reared in pens, after being stocked in cages under high densities during nursery phase. The experiment was carried out in 0.5 m² cages and 2-m² pens set in natural bottom pond with 2,400 m². Prawn post-larvae (PL) with an average weight of 0.026 ± 0.012 g (nursery phase) were initially stocked in 16 cages at the densities of 50, 400, 800 and 1,200 PL m-2. Sixty days later, prawns were transferred to 16 growing pens, at the density of 12 prawns m-2. Initial average weight of the prawn in this phase was the final average weight registered in the nursery phase, as follows: 50 PL m-2 = 2.3 ± 0.3 g; 400 PL m-2 = 0.5 ± 0.03 g; 800 PL m-2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Freshwater prawn; Growing; Macrobrachium rosenbergii; Pens; Survival.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000400001

Establishment of Brachiaria brizantha cv. Marandu, under levels of soil water availability in stages of growth of the plants
Provedor de dados: 96
Autores: Araujo,Leandro Coelho de; Santos,Patrícia Menezes; Mendonça,Fernando Campos; Mourão,Gerson Barreto.
The objective of this work was to evaluate yield traits and development of palisadegrass under the influence of water deficit during the establishment period. The experiment was carried out in a greenhouse, in a completely random block statistical design in a factorial arrangement and additional treatment (3 × 3 + 1). The treatments referred to the suppression of irrigation at different phases of the establishment (sowing, germination and initial tillerring) until the soil presented water content of 75%, 50%, and 25% of the moisture related to field capacity (qFC), besides control treatment with no water restriction. Evaluations of number of grown tillers per vase, green leaves per tiller and plant height were carried out weekly, for five weeks after the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Drought; Palisadegrass; Tillering; Water deficit.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700002

Biomass partitioning and leaf area of Pinus radiata trees subjected to silvopastoral and conventional forestry in the VI region, Chile
Provedor de dados: 97
Autores: RODRÍGUEZ,ROLANDO; HOFMANN,GLENN; ESPINOSA,MIGUEL; RÍOS,DARCY.
The effects of silvicultural regimes on leaf area and biomass distribution were analyzed in 16-year old Pinus radiata trees growing in the semiarid zone of Chile. Three stands with different silvopastoral management were compared with a conventionally managed stand. Data were obtained through destructive sampling of 36 trees and analyzed by MANOVA and regression models of ANCOVA. Results show that the management regime affects the leaf area. Specific leaf area was affected by both silvicultural regime and crown position. Total biomass per tree under the silvopastoral regime was 2.1 to 2.5 times larger than in the conventional forestry regime. However, aboveground biomass partitioning was neither affected by the silvicultural regime nor by the schemes of...
Tipo: Journal article
Palavras-chave: Leaf area; Biomass; Silvopastoral management.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000300008

Carbon stocks in a tropical dry forest in Brazil
Provedor de dados: 124
Autores: Pereira Júnior,Lécio Resende; Andrade,Eunice Maia de; Palácio,Helba Araújo de Queiroz; Raymer,Poliana Costa Lemos; Ribeiro Filho,Jacques Carvalho; Pereira,Francisco Jairo Soares.
ABSTRACT The dry forests are the type most widely distributed vegetation in the tropics, and studies aimed at quantifying the carbon stock in these forests are important for it to be quantified their participation as mitigating the effects of climate change. With that in mind, the aim of this research was to quantify the carbon stocks in the woody, herbaceous, litter and root components of a patch of dry tropical forest, with 30 years of regeneration in Iguatu-CE, Brazil. Initially the vegetation was inventoried by means of a floristic and phytosociological survey of the woody component in a 1 ha area which had been under conservation. The biomass was then estimated employing allometric equations, and the stored carbon was quantified. Stocks of carbon in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Semi-arid; Caatinga; Biomass.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100032

Organic systems in the growth and essential-oil production of the yarrow
Provedor de dados: 124
Autores: Ferraz,Elza Oliveira; Bertolucci,Suzan Kelly Vilela; Pinto,José Eduardo Brasil Pereira; Braga,Andreísa Flores; Costa,Andressa Giovannini.
Fertilization of the soil with organic fertilizers has been gaining importance within the concept of sustainable crop production. This study aimed evaluates the effects of dosages of cattle and poultry manure on Achillea millefolium L. as regards the vegetative growth and the content and chemical composition of its essential oil. For the cattle manure fertilization the dosages evaluated were: 1) soil with no fertilizer; 2) soil + 3.0 kg m-2; 3) soil + 6.0 kg m-2; 4) soil + 9.0 kg m-2 and 5) soil + 12.0 kg m-2. For fertilization with poultry manure: 1) soil without fertilizer; 2) soil + 1.5 kg m-2; 3) soil + 3.0 kg m-2; 4) soil + 4.5 kg m-2 and 5) soil + 6.0 kg m-2. The experimental design was completely randomized, with four replications per treatment and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Achillea millefolium L.; Essential oil; Organic fertilizer; Soil fertily; Biomass.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100014

Genetic diversity and coefficient of kinship among potential genitors for obtaining cultivars of energy cane1
Provedor de dados: 124
Autores: Silveira,Luís Cláudio Inácio da; Brasileiro,Bruno Portela; Kist,Volmir; Daros,Edelclaiton; Peternelli,Luiz Alexandre.
The aim of this study was to evaluate the genetic diversity and coefficient of kinship in 50 sugarcane genotypes, in addition to identifying potential parents for obtaining cultivars of energy cane. Diversity analysis was carried out based on the evaluation of morphological and agronomical characteristics. The coefficient of kinship was obtained from information on pedigree. According to analyses carried out, genotypes were separated into two groups. Group G1 consisted of 13 genotypes from the species Saccharum spontaneum and Saccharum robustum. The other 37 genotypes were from back-crosses with Saccharum officinarum, and were allocated to group G2. The genotypes displayed low values for genetic similarity and coefficient of kinship, indicating broad...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp; Germplasm; Biomass; Breeding.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200358

Screening of basidiomycetes for the production of exopolysaccharide and biomass in submerged culture
Provedor de dados: 59
Autores: Maziero,Rosana; Cavazzoni,Valeria; Bononi,Vera Lúcia Ramos.
Fifty-six strains of Basidiomycetes, including native Brazilian fungi isolated from different ecosystems and edible mushrooms, were screened for production of exopolysaccharides and biomass in submerged culture. Agaricus sp. (CCB 280) and Oudemansiella canarii (Jungh.) Hohn (CCB 179) were the highest exopolysaccharide producers (6.01 and 3.54 g dry w./l respectively) after 7 days of incubation. The best producer of biomass was Schizophyllum commune Fr.:Fr. (CCB 473) with 16.68 g dry w./l in 14 days of incubation. When the culture filtrate was submitted to freezing prior to polysaccharide precipitation, a gelatinous fraction was formed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Basidiomycetes; Exopolysaccharide; Biomass; Submerged culture.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000100015

Orbital spectral variables, growth analysis and sugarcane yield
Provedor de dados: 63
Autores: Simões,Maurício dos Santos; Rocha,Jansle Vieira; Lamparelli,Rubens Augusto Camargo.
Temporal analysis of crop development in commercial fields requires tools for large area monitoring, such as remote sensing. This paper describes the temporal evolution of sugar cane biophysical parameters such as total biomass (BMT), yield (TSS), leaf area index (LAI), and number of plants per linear meter (NPM) correlated to Landsat data. During the 2000 and 2001 cropping seasons, a commercial sugarcane field in Araras, São Paulo state, Brazil, planted with the SP80-1842 sugarcane variety in the 4th and 5th cuts, was monitored using nine Landsat images. Spectral data were correlated with agronomic data, obtained simultaneously to the imagery acquisition. Two methodologies were used to collect spectral data from the images: four pixels (2 × 2) window and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Leaf area index; Crop development analysis; Spectral behavior.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400004

Straw removal of sugarcane from soil and its impacts on yield and industrial quality ratoons
Provedor de dados: 63
Autores: Aquino,Gisele Silva de; Medina,Cristiane de Conti; Silvestre,Danilo Augusto; Gomes,Emerson Crivelaro; Cunha,Ana Carolina Benitez; Kussaba,Deise Akemi Omori; Almeida,Luis Fernando; Shahab,Muhammad; Santiago,Antonio Dias.
ABSTRACT: Mechanical harvesting leaves in its wake a considerable amount of straw in the field, which can be effectively utilized to improve the soil condition and sugarcane yield. However, there is no specific information as to the quantity of straw mulch required to achieve such effects and as to whether it can be used in other sectors for bioelectricity and ethanol production. The aim of this research was to evaluate the effect of removing different amounts of straw from the field and its impact on the yield and industrial quality of sugarcane ratoons. The experiment was carried out on Rhodic soil where six treatments were evaluated including 0 %, 25 % (5 Mg ha−1), 50 % (10 Mg ha−1), 75 % (15 Mg ha−1), 100 % (20 Mg ha−1) straw on the soil surface and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Management of straw; Mulching; Saccharum spp.; Technological characteristics.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000600526

Growth indices ans productivity in sugarcane
Provedor de dados: 63
Autores: Simões,Maurício dos Santos; Rocha,Jansle Vieira; Lamparelli,Rubens Augusto Camargo.
A knowledge about the temporal development of agronomic variables in sugarcane is a very important aspect for the development of crop yield prediction models using remote sensing, and further studies are still needed. This paper describes the temporal evolution of sugarcane biophysical parameters, such as total biomass, leaf area index, number of plants per meter, and productivity. During two seasons, a commercial field in Araras/SP, planted with variety SP80-1842, on the 4th and 5th cuts, was monitored on eight different dates, and data were obtained for 2 m of sugarcane in three crop rows at 18 sampling points. Linear and multiple regression analyses were used to study growth analysis and to correlate agronomic variables (leaf area index and number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Leaf area index; Crop temporal evolution.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000100005

Spectral variables, growth analysis and yield of sugarcane
Provedor de dados: 63
Autores: Simões,Maurício dos Santos; Rocha,Jansle Vieira; Lamparelli,Rubens Augusto Camargo.
Spectral information is well related with agronomic variables and can be used in crop monitoring and yield forecasting. This paper describes a multitemporal research with the sugarcane variety SP80-1842, studying its spectral behavior using field spectroscopy and its relationship with agronomic parameters such as leaf area index (LAI), number of stalks per meter (NPM), yield (TSS) and total biomass (BMT). A commercial sugarcane field in Araras/SP/Brazil was monitored for two seasons. Radiometric data and agronomic characterization were gathered in 9 field campaigns. Spectral vegetation indices had similar patterns in both seasons and adjusted to agronomic parameters. Band 4 (B4), Simple Ratio (SR), Normalized Difference Vegetation Index (NDVI), and Soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: NDVI; Vegetation index; Biomass; Field spectroscopy; Temporal evolution.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000300001

Soil management of sugarcane fields affecting CO2 fluxes
Provedor de dados: 63
Autores: Tavares,Rose Luiza Moraes; Siqueira,Diego Silva; Panosso,Alan Rodrigo; Castioni,Guilherme Adalberto Ferreira; Souza,Zigomar Menezes de; Scala Jr.,Newton La.
ABSTRACT The harvesting system of green sugarcane, characterized by mechanized harvesting and no crop burning, affects soil quality by increasing the remaining straw left on the soil surface after harvesting, thus, contributing to the improvement of physical, chemical, and microbiological soil attributes, influencing CO2 fluxes. This study aimed to evaluate CO2 fluxes and their relation to soil properties in sugarcane crops under different harvesting managements: burned (B), Green harvesting for 5 years (G-5) and Green harvesting for ten years (G-10). For this, a 1 ha sampling grid with 30 points was installed in each area, all located in the Northeast of São Paulo State, Brazil. In each point, CO2 fluxes were measured and the soil was sampled to analyze...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sacharum officinarum; Principal component analysis; Porosity; Biomass.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000600543

Energy potential of sugar cane biomass in Brazil
Provedor de dados: 63
Autores: Rípoli,Tomaz Caetano Cannavam; Molina Jr.,Walter Francisco; Rípoli,Marco Lorenzzo Cunali.
Brazil is a developing tropical country with abundant biomass resources. Sugar cane (Saccahrum spp.) is primarily produced to obtain sugar and alcohol. Presently sugar cane is burned before harvest. If the cane were not burned before harvest, the trash (tops and leaves) could be collected and burned to produce steam to generate electricity, or be converted into alcohol fuel and decrease the severe air pollution problems caused by sugar cane burning. Based upon logical assumptions and appropriate data, we estimate the number of people that could be served each year by this biomass if its energy was converted into electricity. From trash and bagasse, 7.0x10(6) and 5.5x10(6) people y-1 could be served, respectively.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sugar cane; Biomass; Energy.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000400013

Processing of cassava waste for improved biomass Utilization
Provedor de dados: 106
Autores: Sriroth, K.; Chollakup, R.; Chotineeranat, S.; Piyachomkwan, K.; Oates, C.G.
Palavras-chave: Cassava; Waste; Biomass; Utilization.
Ano: 2000
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4811

การประเมินศักยภาพผลผลิตของพันธุ์อ้อยอาหารสัตว์
Provedor de dados: 106
Autores: Kosit Boonaek; Kittima Ruksopa; Chaba Thongpaiyai; Yuttapong Tanthong; Gunyavee Ritcharee; Prasert Chatwachirawong.
Eight improved clones of forage-cane were evaluated for biomass yield performance under irrigatedcondition at Kasetsart University, Kamphaeng Saen campus, Nakhon Pathom during 2011-2012. The study wasdesigned with randomized complete blocks design with 4 replications in 3 crop-cycles, newly planted, first-ratoon and second ratoon that harvested at 6, 4 and 4 month after planting/ratooning, respectively. Total fresh biomass yield from 3 crop-cycles was 40.47 ton/rai. The total yield of 3 crop-cycles varied between 27.44 and 46.46 ton/rai. High biomass yield obtained from the new clones 28-2113, 28-2114 and 28-1727 that were equal to 46.46, 44.86 and 42.96 ton/rai, respectively. Although, three new forage-cane clones had high potential of biomass yield....
Tipo: Collection
Palavras-chave: Forage-cane; Yield testing; Biomass; อ้อย; อาหารสัตว์; พืชอาหารสัตว์; ผลผลิตชีวมวล; อาหารหยาบ; โคเนื้อ; โคนม; การทดสอบผลผลิต.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5305

Influences of soil properties and stem density on the growth and inner bark biomass of paper mulberry (Broussonetia papyrifera) in natural stands
Provedor de dados: 106
Autores: Tanasombat, M.; Sakurai, K.; Thammincha, S.; Thaiutsa, B.
Palavras-chave: Growth; Bark; Biomass; Paper; Mulberry.
Ano: 2005
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4976

Effect of pineapple fiber as biomass source for reinforced plastic
Provedor de dados: 106
Autores: Chollakup, R.; Ujjin, S.; Tantatherdtam, R.; Sriroth, K.
Palavras-chave: Effect; Pineapple; Fiber; Biomass; Plastic.
Ano: 2005
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4887

Microbiological attributes of a cultivated Plinthosol with sugarcane on different levels of straw
Provedor de dados: 109
Autores: Torres-Pórtela,Mirya Grazielle; Carvalho-Leite,Luiz Fernando; Pires-Barbosa,Ranyellson.
Abstract The objective of this work was to evaluate the microbiological attributes of a Plinthossol cropped with sugar cane in straw. The experiment was installed in União (04 ° 51’09”S and 42 ° 53’10 ‘’ W, altitude 52 m), northern region of Piauí state, Brazil. The experimental design was randomized blocks, with four replications, and treatments corresponding to different rates of straw (Mg.ha-1) (0, 4.19, 9.54, 13.04 and 18.38). Microbiological attributes were determined at a depth of 0-10 cm. Data was submitted to analysis of variance, cluster analysis and main components. An increase of straw in the soil influenced the stocks and contents of C, Cmic, Nmic, respiration and microbial and metabolic quotients. Cluster analysis combined the treatments into...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microorganisms; Multivariate; Biomass; Saccharum offcinarum; Soil organic matter.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000400306

Screening of nutritional factors through a Plackett-Burman experimental design during the solubilization of tricalcium phosphate by Penicillium hispanicum
Provedor de dados: 109
Autores: Chan-Cupul,Wilberth; Jiménez-Barrera,Dulce Guadalupe; Lezama-Gutiérrez,Roberto; Ruiz-Sánchez,Esaú; Pérez-Zamora,Octavio; Buenrostro-Nava,Marco Tulio; Manzo-Sánchez,Gilberto.
Abstract Phosphorus plays a fundamental role in plant metabolic processes. Lack of phosphorus in agricultural soils is compensated with chemical fertilizers, which increase the cost of production and contaminate the environment. One approach to avoid this situation is the use of P-solubilizing fungi as biofertilizers. In this study, the solubilization of Ca3(PO4)2 by five native soil-borne micromycetes (SBM) isolated from the rhizosphere of Carica papaya plants was evaluated. The significant nutritional factors involved in the solubilization of Ca3(PO4)2 by Penicillium hispanicum were determined through a Plackett-Burman experimental design (PBED). Both Penicillium SP1 (108.5 mg/L) and P. hispanicum (106.5 mg/L) solubilized 100% of Ca3(PO4)2 at six days of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Carica papaya; Optimization; Rhizosphere; Soil borne micromycetes; Tricalcium phosphate.
Ano: 2019
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122019000200151

Occurrence, body mass and biomass of Syntermes spp. (Isoptera: Termitidae) in Reserva Ducke, Central Amazonia
Provedor de dados: 36
Autores: MARTIUS,Christopher.
The leaf-feeding species Syntermes molestus and S. spinosus are two dominant termite species in Reserva Ducke in Central Amazonia; two other species (S. aculeosus, S. longiceps) exist in the area. All species except S. aculeosus were also found in urban areas. The workers of S. molestus and S. spinosus have average body dry weights of 4.5±0.2 and 13.1±1.4 mg, and the weight of their soldiers is 8.2±0.2 and 51.0±1.7 mg, respectively. Therefore, S. spinosus is among the largest termites of the world. In both species, fresh weight is about 4.7 higher than dry weight (a wider relation than in other termite species). The biomass of the populations of both species amounted to about 1 g m-2 (dry weight; indirect estimate), which rises previous assessments of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon rain forest; Leaf-feeding termites; Body mass; Biomass.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671998000300319

Floristic and structure of an Amazonian primary forest and a chronosequence of secondary succession
Provedor de dados: 36
Autores: SILVA,Camila Valéria de Jesus; SANTOS,João Roberto dos; GALVÃO,Lênio Soares; SILVA,Ricardo Dal'Agnol da; MOURA,Yhasmin Mendes.
ABSTRACT The analysis of changes in species composition and vegetation structure in chronosequences improves knowledge on the regeneration patterns following land abandonment in the Amazon. Here, the objective was to perform floristic-structural analysis in mature forests (with/without timber exploitation) and secondary successions (initial, intermediate and advanced vegetation regrowth) in the Tapajós region. The regrowth age and plot locations were determined using Landsat-5/Thematic Mapper images (1984-2012). For floristic analysis, we determined the sample sufficiency and the Shannon-Weaver (H'), Pielou evenness (J), Value of Importance (VI) and Fisher's alpha (α) indices. We applied the Non-metric Multidimensional Scaling (NMDS) for similarity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest recovery vegetation dynamics forest structure floristic patterns; Biomass.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000200133

THE VEGETATION OF A SEASONAL VÁRZEA FOREST IN THE LOWER SOLIMÕES RIVER, BRAZILIAN AMAZONIA
Provedor de dados: 36
Autores: KLINGE,Hans; ADIS,Joachim; WORBES,Martin.
The species composition of the seasonal várzea forest growing on a bank of the Ilha de Marchantaria / lower Solimões-Amazonas River, Brazil was studied in an area of slightly less than one hectare. Two biomass plots were harvested. Forty-seven arboreal species representing 46 genera in 25 families were recorded. Tree density was 1086 per hectare. Total basal area was 45 m2 ha1. Mean species density was 6.5 ± 1.98 per 100 m2. The most abundant species were Crataeva benthamii(Capparidaceae), Laetia corymbutosa(Flacourtiaceae) and Vitex cymosa(Verbenaceae). The highest basal area per species was 10.2 m2 for Pseudobombax munguba(Bombacaceae). The common species are known to be typical floristic elements of the seasonal varzea forest. Above ground dry biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Bioelements; Biomass; Floodplain; Seasonal várzea forest; Species composition; Structure.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671995000400201

AMMONIA TOXICITY AFFECTS CATIONS UPTAKE AND GROWTH IN PAPAYA PLANTS INCLUSIVE WITH SILICON ADDITION
Provedor de dados: 37
Autores: SANTOS SILVA,Bruna; MELLO PRADO,Renato de; CALERO HURTADO,Alexander; APARECIDA DE ANDRADE,Renata; PEREIRA DA SILVA,Gilmara.
ABSTRACT High ammonia (NH4 +) concentration can exert stress on many plants, which causes nutritional disorders and reduction on plant growth. However, depending on the intensity of the stress, it may be attenuated by silicon. In this work, the response of impact of cations and silicon accumulations and plant growth in cultivated papaya plants was investigated under different toxic ammonia concentrations regardless of the presence of silicon (Si). The experiment was conducted at the Universidade Estadual Paulista (UNESP) with papaya seedlings, variety 'Grupo Formosa' (Calimosa híbrida 01), grown in a glass greenhouse, in 1.7 dm3 pots filled with pine and coconut fiber-based substrate. The experimental design was a randomized block design, in a 5 x 2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carica papaya; Biomass; Phytotoxicity; Nitrogen; Nutrients.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000300345

COMPARATIVE GROWTH AND BIOCHEMICAL COMPOSITION OF FOUR STRAINS OF Nostoc AND Anabaena (CYANOBACTERIA, NOSTOCALES) IN RELATION TO SODIUM NITRATE
Provedor de dados: 37
Autores: ROSALES LOAIZA,Néstor; VERA,Patricia; AIELLO-MAZZARRI,Cateryna; MORALES,Ever.
Nitrogen concentration is an essential parameter in cyanobacterial cultures to produce enriched biomass with biotechnological purposes. Growth and biochemical composition of Nostoc LAUN0015, Nostoc UAM206, Anabaena sp.1 and Anabaena sp.2 were compared at 0, 4.25, 8.5 and 17 mM NaNO3. Cultures under laboratory conditions were maintained for 30 days at a volume of 500 mL. Anabaena sp.1 yielded the highest value of dry mass of 0.26 ± 2.49 mg mL-1 at 8.5 mM NaNO3. For chlorophyll, phycocyanin and phycoerythrin, maximum values were achieved at 17 mM NaNO3 with 18.09 ± 1.74, 102.90 ± 6.73 and 53.47 ± 2.40 μg mL-1, respectively. Nostoc LAUN0015 produced its maximum value of protein 644.86 ± 19.77 μg mL-1, and 890 mg mL-1 of carbohydrates in the absence of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anabaena; Biochemical composition; Biomass; Culture; Nitrate; Nostoc.
Ano: 2016
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2016000200003

Reproductive morphology and phenological aspects of one morphological variant of Hypnea pseudomusciformis (Gigartinales, Rhodophyta)
Provedor de dados: 39
Autores: Jesus,Priscila Barreto de; Pestana,Edilene Maria dos Santos; Affe,Helen Michelle de Jesus; Rocha,Diogo Souza Bezerra; Caires,Taiara Aguiar; Nunes,José Marcos de Castro; Schnadelbach,Alessandra Selbach.
ABSTRACT Hypnea pseudomusciformis was recently described from South America, and has three morphological variants: “musciformis”, “nigrescens”, and “valentiae”. Information on the biology of these variants may help to explain this species’ wide morphological variation despite the absence of genetic divergence among variants. More morphological and ecological data has accumulated on the “musciformis” variant occurring on the Brazilian coast than for the others. In this study, we described the reproductive morphology of a tropical “nigrescens” population and investigated its phenology to provide crucial biological information about this taxon, and perhaps also assist in answering questions about the systematics of H. pseudomusciformis variants. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Cystocloniaceae; Ecology; Hypnea musciformis complex; Reproduction; Systematics.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100067

Temporal variation of Nitella furcata subsp. mucronata var. mucronata f. oligospira (Charophyceae) in the Ninféias pond, São Paulo State, southeast Brazil
Provedor de dados: 39
Autores: Bueno,Norma Catarina; Bicudo,Carlos Eduardo de Mattos.
Temporal and spatial variation of Nitella furcata (Roxburgh ex Bruzelius) C. Agardh emend. R.D. Wood subsp. mucronata (A. Braun) R.D. Wood var. mucronata f. oligospira (A. Braun) R.D. Wood were studied at the Ninféias pond (23°38'18.9"S, 46°37'16.3"W), a tropical, shallow, mesotrophic reservoir located in the Parque Estadual das Fontes do Ipiranga Biological Reserve, Municipality of São Paulo, southeast Brazil. Water samples were collected monthly from October/1996 to October/1997 for turbidity, electric conductivity, pH, alkalinity, dissolved oxygen, nutrients, biomass, and algal phenology analysis. Spatial distribution pattern of algal biomass showed that all four sampling stations were similar among themselves during the whole study period. Regarding...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Charophyceae; Biomass; Phenology; Aquatic macrophyte; Nitella.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062006000100001

Implications of global climate change for the development and ecological interactions between two key Amazonian aquatic macrophytes
Provedor de dados: 39
Autores: Souza,Sthefanie do Nascimento Gomes de; Piedade,Maria Teresa Fernandez; Demarchi,Layon Oreste; Lopes,Aline.
ABSTRACT Amazon wetlands are among the most vulnerable ecosystem to be impacted by climate change, which may increase the frequency of extreme droughts and floods. We used Eichhornia crassipes and Pistia stratiotes, two abundant aquatic plants in the Amazon floodplains, to evaluate the effects of combined temperature and [CO2] increase on growth, physiology and ecological interactions. Individual and paired plants were deposited for three weeks in a microcosm under four IPCC scenarios: control (current temperature/CO2), mild (control + 1.5 ºC, 200 ppm CO2), intermediate (control + 2.5 ºC, 450 ppm CO2) and extreme (control + 3.5 ºC, 850 ppm CO2). P. stratiotes died after three weeks in the intermediate and extreme treatments; E. crassipes experienced no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Competition; Eichhornia crassipes; Pistia stratiotes; Wetlands.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062021005002204

Consumo hídrico e coeficiente de cultura para o híbrido DKB 390 - DOI: 10.4025/actasciagron.v31i3.379
Provedor de dados: 1
Autores: Detomini, Euro Roberto; USP; Massignan, Luiz Fernando Druzina; USP; Libardi, Paulo Leonel; USP; Dourado Neto, Durval; USP.
O objetivo deste trabalho é caracterizar o consumo hídrico do genótipo DKB 390 em condições adequadas de irrigação, tanto para situações de suprimento suficiente quanto para subótimo de nitrogênio. Valores de coeficiente de cultura são também apresentados para diferentes fases, para o primeiro caso, no intuito de prover subsídios teóricos para orçamento de água à cultura e para o manejo da irrigação durante o ciclo. Um experimento de campo foi conduzido durante a estação principal de cultivo, avaliando-se biomassa, área foliar, umidade do solo, dados climatológicos e transmitância de luz, permitindo derivar o balanço hídrico, o consumo hídrico e a eficiência de uso da água. O genótipo mencionado requer por volta de 600 mm para a obtenção de elevadas...
Palavras-chave: 5.01.00.00-9    Agronomia Zea mays; Evapotranspiração; Nitrogênio; Biomassa; KC; Milho Zea mays; Evapotranspiration; Nitrogen; Biomass; Kc; Maize.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/379

Homeopathic drugs Arsenicum album and Sulphur affect the growth and essential oil content in mint (Mentha arvensis L.) - DOI: 10.4025/actasciagron.v31i1.6642
Provedor de dados: 1
Autores: Bonato, Carlos Moacir; UEM; Proença, Gentil Telles de; UEM; Reis, Bruno; UEM.
Effects of homeopathic drugs Sulphur and Arsenicum album in growth variables and essential oil content of mint are analyzed. Four homeopathic dinamizations (6, 12, 24 and 30CH) were used for both drugs in the centesimal scale (CH=centesimal hahnemannian), besides control (water). Treatments were conducted in greenhouse and homeopathic drugs applied weekly (250 mL vase-1) for 98 days. Plant height, root system’s dry mass, shoot’s dry mass and essential oil content were determined. Among the tested homeopathy drugs, Sulphur increased values of fresh and dry biomass more than Arsenicum album. Plant height increased by the two drugs and their respective dinamizations. Whereas Sulphur inhibited dry biomass production, except 6CH dinamization, it increased...
Palavras-chave: 5.02.01.07-7 Solos Florestais ultradiluted; Secondary metabolism; Biomass; Homeopathic drugs.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6642

Evaluation of supplementation of sucrose medium on the synthesis of Zymomonas mobilis bio-products - doi: 10.4025/actascibiolsci.v32i3.1519
Provedor de dados: 3
Autores: Borsari, Raquel Renan Jorge; Universidade Estadual de Londrina; Buzato, João Batista; UEL; Silva, Rui Sérgio dos Santos Ferreira da; UEL; Celligoi, Maria Antonia Pedrini Colabone; UEL.
The effect of the variables pantothenic acid, yeast extract and sodium chloride, as well as the cell permeabilization technique, were investigated on the formation of levan, ethanol, sorbitol and biomass of Zymomonas mobilis, using a 24-1 fraction factorial design. Cell growth was determined by turbidimetry at 605 nm, relating it to a biomass with a dry weight calibration curve. Reducing sugars were quantified according to Somogyi and Nelson. Total sugars were quantified by the phenol-sulfuric acid method, sorbitol by HPLC and ethanol. The levan produced was precipitated by the addition of absolute ethanol and quantified in fructose units. In levan biosynthesis, the variable that had the largest contribution was cell condition. The results suggested that...
Palavras-chave: 2.08.02.00-5; 2.12.02.02-8 Zymomonas mobilis; Fermentation; Biomass; Substrate; Sorbitol; Levan Bioquímica dos microrganismos; Microbiologia industrial e de fermentação Zymomonas mobilis; Fermentation; Biomass; Substrate; Sorbitol; Levan.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1519

Influence of light on the initial growth of invasive Cryptostegia madagascariensis Bojer in the Brazilian semiarid region
Provedor de dados: 3
Autores: Brito, Selma Freire de; Pinheiro, Charles Lobo; Nogueira, Francisco Carlos Barboza; Medeiros Filho, Sebastião; Matos, Dalva Maria da Silva.
The invasion by Cryptostegia madagascariensis causes economic and environmental problems in Northeastern Brazil. Current study evaluates the initial growth of C. madagascariensis on light gradient. The experiment used 0, 30, 50 and 70% shading treatments arranged in a completely randomized design and evaluated in four periods, namely, 35, 50, 65 and 80 days. Height, absolute growth rate, relative growth rate, number of side branches, number of leaves, leaf area, specific leaf area, leaf area ratio, root mass ratio, stem mass ratio, leaf mass ratio and leaf area/root mass ratio were evaluated. Results showed that the height was greater in shade environments, and the greater the available light, the greater was the number of side branches. C....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Functional traits; Caatinga; Shading; Morphological adjustments; Biomass.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28179

Waste to energy technologies for solid waste management a case study of Uganda
Provedor de dados: 111
Autores: Miito, Gilbert John; Banadda, Noble.
Municipal solid waste management is one of the major environmental problems of developing countries. Investments in solid waste management would not only translate into jobs and income but also a cleaner environment. Over years a number of solid waste management technologies have been carried out in many developing parts of the world. Some were successful in generating lasting impacts on the improvement of solid waste management, however, many technologies failed due to unsustainability. This is partly attributed to differences in waste characteristics between developed countries and the less developed countries and the resource constraints in less developed countries. On the other hand, less developed countries are also known for being energy deprived and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: WASTE MANAGEMENT solid waste; Energy; Sustainable; Sub-Saharan Africa; Biomass; Uganda.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3767

DEVELOPMENT OF AN IMPROVED DOUBLE BURNER NATURAL DRAFT BIOMASS COOKSTOVE
Provedor de dados: 111
Autores: YUNUSA, SULEIMAN USMAN.
An improved natural-draft double burner biomass cookstove was developed. The study became imperative to minimize the increasing rate of deforestation, harmful gas accumulation as well as excessive fuel consumption and heat loss experienced in the use of the inefficient and traditional cooking method. The study was conducted in the Department of Agricultural and Bio-resources Engineering, Ahmadu Bello University, Zaria, Nigeria. The cookstove was designed based on performance, affordability, and usability, and it was constructed purely from locally available materials. Stainless steel was used to construct the stove cladding; it possesses lesser thermal conductivity of 14.9 W/mk as compared to aluminum and mild steel which have 174.6 W/mk and 80.2 W/mk,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Cookstove; Traditional; Improved; Natural-draft.
Ano: 2022
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7279

Effect of different tillage and residue management practices on growth and yield of corn cultivation in Thailand
Provedor de dados: 111
Autores: Sornpoon, Wlaiwan; Jayasuriya, Hemantha P. W.
The tillage and residue management during soil bed preparation need to be in appropriate manner for sustainable farming practice.  The effects of tillage and residue management methods on corn cropping were studied on loamy soil in Bangrakum district, Phitsanulok Province, Thailand.  The effects of five commonly used tillage methods: subsoiler tillage (ST), three methods of conventional tillage (CT1, CT2 and CT3), no-tillage (NT), as main factors and two corn residue management methods; burned (R1) and unburned (R2), as sub-factors were studied in a randomized strip plot configuration.  Tillage treatment showed significant effect on physical and chemical soil properties, plant growth and development, grain yield, total aboveground biomass and most...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering; Tillage optimization Tillage; No-tillage; Emergence; Compaction; Subsoiler; Biomass.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2235

Plug Flow Analysis for the Design of the Compaction Region of a Tapered Screw Extruder Biomass Briquetting Machine
Provedor de dados: 111
Autores: Orisaleye, Ifeoluwa; Ojolo, Sunday.
The study of compaction or solids conveying in a screw extruder has been carried out majorly on the straight screws using the plug flow analysis. Despite this, the analysis of the straight screw appears to be complex as contained in existing literatures based on the force and torque balance. The tapered screw, which is considered to be an effective option for biomass compaction, introduces greater complications because the geometry is constantly changing. In this study, a method based on the traction and retardation mechanism of friction is developed for a fully unwound screw channel utilizing only the force balances. The procedure has been used to carry out a parametric analysis of the tapered screw extruder for a screw press biomass briquetting machine....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass Energy; Machinery Development plug flow; Biomass; Extruder; Analysis.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3220

STUDYING DEVELOPMENT OF HERMETIA ILLUCENS FLY LARVAE CULTIVATED ON HIGH CELLULOSE PLANT SUBSTRATES
Provedor de dados: 111
Autores: Yuirna, Olga.
Hermetia illucens L. larvae with experimentally confirmed morphological and genetic characteristics were grown on plant substrates with 4.3% to 19.0% cellulose content: crushed corn kernels, wheat bran, beet pulp, and distillery stillage. It has been determined that the larvae are able to grow rapidly on the plant substrates during 10-14 days until the prepupal stage if optimal conditions are maintained, i.e.: air temperature (28 °C) and substrate humidity about 60%. The highest substrate conversion was demonstrated for corn kernels and was equal to 77% in 14 days. A biomass yield of 181 g from 1 kg of substrate was obtained. With wheat bran the conversion was 64%, process time: 10 days. Distillery stillage and beet pulp contained high amounts of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fly Hermetia illucens L.; Larvae of Black soldier fly; Biomass; Bioconversion; Plant substrates; Amount of cellulose; Feed of farm animals.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4567

Effect Of Drilling Quality On Biomass Yield
Provedor de dados: 111
Autores: Maga, Juraj.
The paper is focused on the study and evaluation of quality of the seeding of seeds and its effect on the biomass yield. The aim was to evaluate the space arrangement of the seeds by using of polygon method on one field with the repetition for different forward speeds of the drill machine - 10, 12, 14, 16 a 18 km.h-1. Field experiments have been conducted with the drill machine with continuous seeding TUME NOVA COMBI 3000 having a double-disc seeding unit. Within the experiments there was used winter wheat, variety Magisters, with seeding rate 220 kg per ha. For the evaluation there were used digital photographs, which were taken during repeated measurements of the each value of the forward speed after sprouting of crop. These images have been used in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seeder; Sowing quality; Biomass; Operating speed.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3083

Factors affecting properties of fuel pellets from compaction of mixed biomass and waste plastics
Provedor de dados: 111
Autores: Auprakul, Unchana; Promwungkwa, Anucha; Tippayawong, Nakorn; Chaiklangmuang, Suparin.
The purpose of this research is to investigate densified solid fuel from mixed plastic wastes which were recovered from dumpsites. Corn stover was used as natural binder of the fuel. In this study, the corn stover can bind plastic materials into the fuel using compaction. The densification of mixed plastic wastes and corn stover was investigated at 150 MPa compression pressure. The size of pellet was 8 mm in diameter and 20 mm in length. The parameters effect on the fuel properties of this research were moisture content (5-20%w.b.), types of material, mixed plastic wastes and corn stover ratio (55:45, 65:35 and 75:25), and preheating temperatures (75 and 100°C). Results found that corn stover can improve chemical properties (reducing sulfur and chlorine...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Densification; RDF; Renewable energy; Waste-to-energy.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5181

PRODUCTION OF COMPOSITE SOLID FUEL USING ORANGE PEELS AND CORN COBS FOR ENERGY SUPPLY
Provedor de dados: 111
Autores: Aliyu, Mohammed; Mohammed, Ibrahim Shaba; Usman, Mohammed; Dauda, Solomon Musa; Igbetua, Igbetua Joshua.
Abstract: This study presents investigation of orange peels and corn cobs being some of the numerous biomass wastes in Nigeria to determine their characteristics through briquetting technology. This is part of the efforts geared towards production of fuel product from agro-waste biomass and a more environmentally friendly fuel that can be used as an alternative fuel to the commonly used fossil fuel that has brought about global warming threatening our environment and the earth. This effort is also to reduce our over-dependence on the use of fuel-wood so as to reduce its consequences on climate change and other consequences on the environment. In the process, orange peels and corn cobs were collected from within the environment of Chanchaga and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy; Biomass; Proximate Analysis; Ultimate Analysis; Ignition time; Water boiling test.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5640

The Effects of Operating Conditions and The Biomass Component on Combustion Efficiency and Emission Performance of a Swirling Fluidized-bed Combustor Fired Using
Provedor de dados: 111
Autores: UDOMSUP, JANYA.
This work presents a study for biomass possible to bring renewable energy in a swirling fluidized bed combustor (SFBC). The main objective of this experimental work was to study the biomass component and excess air of biomass. Palmyra palm shell, Leucaena (lam.), and Water hyacinth are using as fuel in the tests. Quartz sand of 600-850 µm and static bed height of 20 cm was used as inert bed material. For all of tests, the feed rate was fixed 45 kg/hr. for variable excess air (of 40 60 and 80%). As the experimental results, the temperature profiles in SFBC were obviously seen deviate when tests with higher excess air. In the test run, the highest cellulose (palmyra palm shell) for 80% excess air had CO and NO emissions were found in quite stable level (less...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Biomass Component; Efficiency; Emission; Fluidized-bed; Combustion; Swirling.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5945

Techno-economic assessment of municipal solid waste gasification for electricity generation: a case study of Kampala City, Uganda
Provedor de dados: 111
Autores: Bernard, Kivumbi.
This study was aimed at assessing the techno-economic potential of municipal solid waste (MSW) generated in Kampala City for electricity production through gasification. The quantity, characteristics and gasification parameters were determined. In addition, the gasifier- engine system components were sized, and an economic analysis was conducted to obtain the net present value (NPV) and the payback period. This study found that 523 t/d of MSW is collected in Kampala City. The biomass component of MSW was found to be 459.5 t/d with moisture content of 71.09% on as-received basis. The physical characteristics of the gasified biomass included 11.8% moisture content, 88.2% total solids, 25.9% ash content and 57.7 kg/m3 bulk density. The resulting normalized...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Municipal solid waste; Biomass; Gasification; Economic analysis; Producer gas; Electricity.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3363

Use of multivariate approaches in biomass energy plantation harvesting: logistics advantages
Provedor de dados: 111
Autores: Costa, Corrado; Sperandio, Giulio; Verani, Stefano.
Agricultural biomass supply chain consisting of multiple harvesting, storage, pre-processing, and transport operations.  This network operates in space and time coordinates and produces empirical data used for many purposes, including wood-flow planning, harvesting cost calculation and work rate setting.  The aim of this study was to explore and propose the use of a multivariate approach, namely, the Partial Least Squares (PLS) multivariate regression approach and compare its performance with the commonly used Ordinary Linear Regression (OLS).  In particular, the study aimed at comparing the main statistical significance of indicators attributed to models calculated with OLS and PLS regressions from the same original datasets, for the purpose of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Harvesting; Biomass; Logistics; Machine costs; Multivariate statistics; Ordinary linear regression; Partial least square.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2910

Physico-Mechanical and Fuel Properties of Sawdust Briquettes using Abelmoschus esculentus Waste as a Binder
Provedor de dados: 111
Autores: Ohagwu, Chukwuemeka; Nwakaire, joel; Amaefule, Desmond; Anyanwu, Cosmas; Nwaezeh, Chiadikobi.
Various physicomechanical, and fuel properties of sawdust briquettes with Abelmoschus esculentus (okra) waste binder additive were determined. Elemental analysis was done to determine the oxygen (O), hydrogen (H), and carbon content of the briquettes.  Volatile matter, ash content, fixed carbon, heating value, density, compressive strength, stability, durability, and shatter resistance. 5%, 10%, 15%, and 20% Abelmoschus esculentus composition per weight of the biomass were used. The 5% Okra briquette had the highest volatile matter and heating value of 85.46% and 17.82 MJ/kg, while maintaining the lowest ash content and moisture content of 1.59% and 7.6%, respectively. The briquette with 5% Abelmoschus esculentus (Okra) composition had the highest carbon...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abelmoschus esculentus; Briquette; Specific fuel consumption; Binder; Biomass.
Ano: 2022
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7121

Alternative biomass furnace wall material from biomass furnace ash
Provedor de dados: 111
Autores: Flores, Edgar Dulay.
Biomass furnace ash (BFA) generated from drying of grains in mechanical dryers were blended with cement in varying ratio of 1:4, 1:5, 1:6, 1:7 and 1:8 by volume.  Each composition was cured in an ambient condition for 7, 14 and    28 days and determined their properties such as density, porosity, compressive strength and thermal shock resistance.  Cold crushing strength increased with increasing cement content and curing time.  Likewise, density increased with increasing cement content and curing time while porosity showed the other way.  All the sample compositions exceeded 30 cycles without any crack when subjected to thermal shock resistant cycles of heating and cooling using a firing temperature of 1000oC in an electric muffle furnace.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Rice husk; Ash; Furnace; Mechanical dryer.
Ano: 2017
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3944

Characterization and evaluation of cocoa (Theobroma cacao L.) pod husk as a renewable energy source
Provedor de dados: 115
Autores: Martínez-Ángel,J. Daniel; Villamizar-Gallardo,R. Amanda; Ortíz-Rodríguez,O. Orlando.
In Colombia, the cocoa pod husk (CPH) is expected to reach 2 100 000 t year-1 in 2021 which is usually burned or left over for decomposing outdoors at the plantations without any environmental control. Therefore, this study evaluated the energetic potential of CPH obtained after the initial processing of this fruit (Theobroma cacao L.). Three biological materials were analyzed: clone CCN-51 (CPH1), clone ICS-39 (CPH2) and a hybrid (CPH3), which present high yield and number of fruits per tree. The samples were examined by using different characterization techniques for raw biomass and ashes; in addition to the ultimate, proximate and heating value analyses, different fouling indexes were determined in order to estimate the phenomena of solids formation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Cocoa pod husk; Gasification; Crop residues; Renewable energy systems; Theobroma cacao L.
Ano: 2015
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000300008

Protists and bacteria interactions in the presence of oil
Provedor de dados: 42
Autores: BITENCOURT,JOSÉ A.P.; SILVA,FREDERICO SOBRINHO; SILVA-NETO,INÁCIO D. DA; CRAPEZ,MIRIAN A.C.
Little is known about the role of protists and bacteria interactions during hydrocarbon biodegradation. This work focused on the effect of oil on protists from three different locations in Guanabara Bay and bacteria from Caulerpa racemosa (BCr), Dictyota menstrualis (BDm) and Laurencia obtusa (BLo) during a 96 h bioassay. Cryptomonadida (site 1, 2 and 3), Scuticociliatida (site 2) and Euplotes sp.1 and Euplotes sp.2 (site 3) appeared after incubation. The highest biomass observed in the controls was as follows: protist site 3 (6.0 µgC.cm–3, 96 h) compared to site 3 with oil (0.7 µgC.cm–3, 96 h); for bacteria, 8.6 µgC.cm–3(BDm, 72 h) and 17.0 µgC.cm–3(BCr with oil, 24 h). After treatment, the highest biomasses were as follows: protists at site 1 and BLo,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterial consortia; Biomass; Free living protist; Guanabara Bay; Microbial loop; Petroleum.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200745

Carbon and nutrient stocks of three Fabaceae trees used for forest restoration and subjected to fertilization in Amazonia
Provedor de dados: 42
Autores: JAQUETTI,ROBERTO K.; GONÇALVES,JOSÉ FRANCISCO C.
ABSTRACT Amazonia is crucial to global carbon cycle. Deforestation continues to be one of the main causes of the release of C into the atmosphere, but forest restoration plantations can reverse this scenario. However, there is still diffuse information about the C and nutrient stocks in the vegetation biomass. We investigated the carbon and nutrient stocks of Fabaceae trees (Inga edulis, Schizolobium amazonicum and Dipteryx odorata) subjected to fertilization treatments (T1 - no fertilization; T2 - chemical; T3 - organic; and T4 - organic and chemical fertilization) in a degraded area of the Balbina Hydroelectric Dam, AM - Brazil. As an early successional species, I. edulis stocked more C and nutrients than the other two species independent of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Degraded ecosystems; Plant nutrition; Tropical tree species.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401761

Structure and temporal variation of the phytoplankton of a macrotidal beach from the Amazon coastal zone
Provedor de dados: 42
Autores: MATOS,JISLENE B.; OLIVEIRA,SUELLEN M.O. DE; PEREIRA,LUCI C.C.; COSTA,RAUQUÍRIO M. DA.
ABSTRACT The present study aimed to analyze the structure and the temporal variation of the phytoplankton of Ajuruteua beach (Bragança, Pará) and to investigate the influence of environmental variables on the dynamics of this community to provide a basis about the trophic state of this environment. Biological, hydrological and hydrodynamic samplings were performed during a nyctemeral cycle in the months of November/08, March/09, June/09 and September/09. We identified 110 taxa, which were distributed among the diatoms (87.3%), dinoflagellates (11.8%) and cyanobacteria (0.9%), with the predominance of neritic species, followed by the tychoplankton species. Chlorophyll-a concentrations were the highest during the rainy period (24.5 mg m-3), whereas total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon beaches; Biomass; Microalgae; Seasonal variation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401325

Critical analyses when modeling tree biomass to ensure additivity of its components
Provedor de dados: 42
Autores: BEHLING,ALEXANDRE; PÉLLICO NETTO,SYLVIO; SANQUETTA,CARLOS ROBERTO; CORTE,ANA PAULA D.; AFFLECK,DAVID L.R.; RODRIGUES,AURÉLIO L.; BEHLING,MARCOS.
ABSTRACT It is presented the theme additivity of biomass of tree components. To evaluate and discuss this context, experimental information collected in forests of Acacia mearnsii De Wild. was used. Equations for components (stem and crown) and total biomass were fitted by means of two procedures: 1) generalized nonlinear least squares and 2) weighted-nonlinear seemingly unrelated regressions. Analyzing the performance of the estimators, it can be concluded that the two tested procedures are equivalent. On the other hand, this conclusion differs when evaluated the consistency and efficiency of the estimators. Fitting equations for the components and for the total biomass by an independent way is not realistic, because from a biological point of view the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Biological consistency; Non-linear regression; System of equations.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401759

Use of intertidal areas by shrimps (Decapoda) in a brazilian Amazon estuary
Provedor de dados: 42
Autores: SAMPAIO,HEBERT A.; MARTINELLI-LEMOS,JUSSARA M.
The present work investigated the occupation and the correlation of the shrimp abundance in relation to environmental variables in different habitats (mangroves, salt marshes and rocky outcrops) in an Amazon estuary. The collections were made in August and November 2009, at low syzygy tide on Areuá Beach, situated in the Extractive Reserve of Mãe Grande de Curuçá, Pará, Brazil totaling 20 pools. In each environment, we recorded the physical-chemical factors (pH, salinity, and temperature) and measured the area (m2) and volume (m3) of every pool through bathymetry. The average pH, salinity, temperature, area and volume of tide pools were 8.75 (± 0.8 standard deviation), 35.45 (± 3), 29.49 °C (± 2.32), 27.41 m2 (± 41.18), and 5.19 m3(± 8.01), respectively....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Habitat; Density; Biomass; Decapoda.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100333

Cyanobacterial blooms in stratified and destratified eutrophic reservoirs in semi-arid region of Brazil
Provedor de dados: 42
Autores: Dantas,Ênio W.; Moura,Ariadne N.; Bittencourt-Oliveira,Maria do Carmo.
This study investigated the dynamics of cyanobacteria in two deep, eutrophic reservoirs in a semi-arid region of Brazil during periods of stratification and destratification. Four collections were carried out at each reservoir at two depths at three-month intervals. The following abiotic variables were analyzed: water temperature, dissolved oxygen, pH, turbidity, water transparency, total phosphorus, total dissolved phosphorus, orthophosphate and total nitrogen. Phytoplankton density was quantified for the determination of the biomass of cyanobacteria. The data were analyzed using CCA. Higher mean phytoplankton biomass values (29.8 mm³.L-1) occurred in the period of thermal stratification. A greater similarity in the phytoplankton communities also occurred...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Cylindrospermopsis raciborskii; Seasonal dynaics; Theral pattern.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400019

Optimization of RT-PCR reactions in studies with genes of lignin biosynthetic route in Saccharum spontaneum
Provedor de dados: 42
Autores: LLERENA,JUAN P.P.; ARAÚJO,PEDRO; MAZZAFERA,PAULO.
ABSTRACT Saccharum spontaneum has been used for the development of energy cane a crop aimed to be used for the production of second-generation ethanol, or lignocellulosic ethanol. Lignin is a main challenge in the conversion of cell wall sugars into ethanol. In our studies to isolate the genes the lignin biosynthesis in S. spontaneum we have had great difficulty in RT-PCR reactions. Thus, we evaluated the effectiveness of different additives in the amplification of these genes. While COMT and CCoAOMT genes did not need any additives for other genes there was no amplification (HCT, F5H, 4CL and CCR) or the yield was very low (CAD and C4H). The application of supplementary cDNA was enough to overcome the non-specificity and low yield for C4H and C3H, while...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Cell wall; Energy cane; Lignin; Lignocellulosic ethanol; Sugarcane.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100509

A comparative study of nutritional composition and potential use of some underutilized tropical fruits of Arecaceae
Provedor de dados: 42
Autores: SILVA,RAQUEL B.; SILVA-JÚNIOR,EDVALDO V.; RODRIGUES,LAÍS C.; ANDRADE,LAISE H.C.; SILVA,SUZENE I. DA; HARAND,WOLFGANG; OLIVEIRA,ANTONIO F.M.
In this study, pulp and kernel of fruits from six Arecaceae species were subjected to proximate analysis, fatty acid composition and total carotenoid content analysis. The species with the highest carbohydrate, lipid and protein values were Ptychosperma macarthurii(70.1 g/100 g in the kernel), Syagrus cearensis(40.6 g/100 g in the kernel), andS. coronata(20.6 g/100 g in the pulp). The ash content ranged from 0.61 to 7.51 g/100 g. Lauric, palmitic, and oleic acids were the major fatty acids identified. The total carotenoid contents and retinol activity equivalents were highest in the Pinanga kuhlii (180.3 µg/g) andAcrocomia intumescens (138.0 µg/g) pulp oils. Retinol activity equivalents varied between the investigated species (456 to 1515 μg RAE/100 g)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Foods; Oleic acid; Palm trees.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401701

Global patterns of aboveground carbon stock and sequestration in mangroves
Provedor de dados: 42
Autores: ESTRADA,GUSTAVO C.D.; SOARES,MÁRIO L.G.
ABSTRACT In order to contribute to understand the factors that control the provisioning of the ecosystem service of carbon storage by mangroves, data on carbon stock and sequestration in the aboveground biomass (AGB) from 73 articles were averaged and tested for the dependence on latitude, climatic parameters, physiographic types and age. Global means of carbon stock (78.0 ± 64.5 tC.ha-1) and sequestration (2.9 ± 2.2 tC.ha-1.yr-1) showed that mangroves are among the forest ecosystems with greater capacity of carbon storage in AGB per area. On the global scale, carbon stock increases toward the equator (R²=0.22) and is dependent on 13 climatic parameters, which can be integrated in the following predictive equation: Carbon Stock in AGB = -16.342 + (8.341 x...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Carbon; Ecosystem services; Mangrove; Regression analysis; WorldClim.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000300973

Genetic divergence among accessions of Axonopus jesuiticus x A. scoparius based on morphological and agronomical traits
Provedor de dados: 42
Autores: SCHEFFER-BASSO,SIMONE M.; FAVARETTO,ADRIANA; FELINI,VANDERLEIA; GOMES,CLAUDINEI C.; CARNEIRO,LUIS E.; CECCHIN,KALINCA.
This study had the objective of assessing the genetic divergence in giant missionary grass (Axonopus jesuiticus x A. scoparius) germplasm based on morphological and agronomic traits. Five accessions were evaluated in the field: V14337, V14403, V14404, V14405 and V14406. Three contrasting groups were formed using the UPGMA clustering method: V14337 and V14404 formed one group, V14403 and V14405 formed another, and V14406 was isolated from the other accessions. The most striking traits for the identification of the accessions were the height of the plant and the change color of the leaf. Only V14406 accession had purplish green leaves. The other four accessions differed with regards to plant height and dry matter production, with superiority of V14337 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Canopy structure; Giant missionary grass; Morphological traits; Nutritive value.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100475

Influence of stocking density on growth performance and welfare of juvenile tilapia ( Oreochromis niloticus ) in cages
Provedor de dados: 45
Autores: Costa,Â.A.P.; Roubach,R.; Dallago,B.S.L.; Bueno,G.W.; McManus,C.; Bernal,F.E.M.
RESUMO A intensificação da produção de tilápias pode gerar implicações negativas sobre o desempenho e o bem-estar dos peixes. Assim, é essencial determinar a densidade correta para otimizar a produção. O objetivo deste estudo foi avaliar o desempenho e o bem-estar de tilápias-do-nilo (Oreochromis niloticus) juvenis, com peso inicial médio de 30g (± 2,70), criadas em três diferentes densidades de estocagem, em gaiolas de flutuação. Os peixes foram alimentados três vezes/dia, com ração contendo 32% de proteína bruta, durante 74 dias. O desenho experimental foi completamente ao acaso, com três tratamentos (250 peixes/m3, 350 peixes/m3 e 450 peixes/m3) e quatro réplicas. Os parâmetros físico-químicos da água foram monitorados durante o experimento. A elevação...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal welfare; Aquaculture; Biomass; Cortisol; Stress.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000100243

Allometric models for estimating the phytomass of a secondary Atlantic Forest area of southeastern Brazil
Provedor de dados: 49
Autores: Burger,Déborah Moreira; Delitti,Welington Braz Carvalho.
The purpose of this study was to develop and validate equations to estimate the aboveground phytomass of a 30 years old plot of Atlantic Forest. In two plots of 100 m², a total of 82 trees were cut down at ground level. For each tree, height and diameter were measured. Leaves and woody material were separated in order to determine their fresh weights in field conditions. Samples of each fraction were oven dried at 80 °C to constant weight to determine their dry weight. Tree data were divided into two random samples. One sample was used for the development of the regression equations, and the other for validation. The models were developed using single linear regression analysis, where the dependent variable was the dry mass, and the independent variables...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Allometry; Carbon; Secondary Atlantic Forest; Forest biomass estimation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000400012

Seagrass biomass and their role as carbon reservoirs in the localities of San Andrés Island and La Guajira, Colombian Caribbean
Provedor de dados: 50
Autores: Acosta-Chaparro,Andrés; Sánchez-Valencia,Laura; Gómez-López,Diana Isabel; Gónzalez-Corredor,Juan David; Navas-Camacho,Raúl.
ABSTRACT Seagrass meadows have stood out for being very effective fixing atmospheric carbon, among others, due to their ability to produce plant biomass. Therefore, the values of shoot density (m2), biomass (cores) and carbon present in 12 locations with Thalassia testudinum at the Colombian Caribbean (La Guajira and San Andrés Island) were quantified. The biological samples were processed in laboratory until obtaining the values of aerial, underground and total dry weight, and the estimation of the carbon was stablishing from a ratio of 35 % of the dry biomass. Statistical tests were carried out to determine significant differences between the sites, highlighting the aerial biomass in La Guajira and the underground biomass in San Andrés. It was calculated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seagrass; Colombia; Biomass; Blue carbon.
Ano: 2022
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612022000100137

Fiber composition of a diversity panel of the world collection of sugarcane (Saccharum spp.) and related grasses
Provedor de dados: 53
Autores: Todd,James Ryan; Sandhu,Hardey; Binder,Joe; Arundale,Rebecca; Gordon,Vanessa; Song,Jian; Glaz,Barry; Wang,Jianping.
ABSTRACT The world collection of sugarcane (Saccharum hybrids. and related grasses (WCSRG) is an important source of genes for sugarcane and energycane breeding. The core collection or diversity panel of the WCSRG was created in Canal Point with 300 accession and 10 checks to evaluate its diversity. The fiber components of the species and accessions within the WCSRG are unknown, so a shredded and dried fiber sample was taken from each accession and sent for fiber analysis. The acetyl groups, acid insoluble lignin, acid soluble lignin, arabinan, glucan, holocellulose, total lignin, structural ash, and xylan were quantified on a % fiber basis and nonstructural ash on a % total basis. There were significant, but not large differences between species for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofuel; Bioenergy; Miscanthus; Erianthus; Biomass.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100048

Agronomic performance of white oats cultivated under fertigation with treated sewage effluent and definition of critical limits of Normalized Difference Vegetation Index
Provedor de dados: 53
Autores: Coelho,Anderson Prates; Faria,Rogério Teixeira de; Barbosa,Aline Michelle da Silva; Dalri,Alexandre Barcellos; Rosalen,David Luciano.
ABSTRACT One of the benefits of irrigation with wastewater in agriculture is the reduction in the use of mineral fertilizers and the increase in crop yield. For wastewater application, the use of remote sensing can help to define specific management areas. The aim of this study was to evaluate the yield and the growth of irrigated white oats (Avena sativa L.) with varying treated sewage effluent (TSE) levels. These attributes were then correlated with Normalized Difference Vegetation Index (NDVI) values obtained at four phenological stages of the crop and used to define critical limits of NDVI. The experiment consisted of five TSE treatments differing in irrigation depths (11, 31, 60, 87, and 100%). Mean NDVI values in the crop were determined with an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena sativa L.; Biomass; Modeling; NDVI; Remote sensing.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400553

Biogas and Biomass Implementation in Rural Areas
Provedor de dados: 52
Autores: Sandim,Álvaro A.; Batista,Alexandre G.; Bareta,Maria Luiza E.; Betini,Roberto C.; Pepplow,Luiz Amilton.
Abstract Advances in energy demand in rural areas cannot be dissociated from agricultural modernization, large estates, mechanization of labor and reduced investment in small production. The use of biogas together with biomass are the most cost-effective ways for the small producer, as it has a high calorific value. In the case of biogas the procedure is performed by combining a compressor and a chiller, allowing the gas enter the reactor and burn together with the air stream. The use of these techniques is an auxiliary way to reduce the cost of the producer to produce a certain crop, besides allowing a participation in the final energy supply, so that the utilities have an alternative to distribute the surplus energy to another region, serving thus a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biogas; Biomass; Rural areas; Electricity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000200201

Effect of buctril super (Bromoxynil) herbicide on soil microbial biomass and bacterial population
Provedor de dados: 52
Autores: Abbas,Zafar; Akmal,Muhammad; Khan,Khalid Saifullah; Fayyaz-ul-Hassan,.
The present study aimed to evaluate the effect of bromoxynil herbicide on soil microorganisms, with the hypothesis that this herbicide caused suppression in microbial activity and biomass by exerting toxic effect on them. Nine sites of Punjab province (Pakistan) those had been exposed to bromoxynil herbicide for about last ten years designated as soil 'A' were surveyed in 2011 and samples were collected and analyzed for Microbial Biomass Carbon (MBC), Biomass Nitrogen (MBN), Biomass Phosphorus (MBP) and bacterial population. Simultaneously, soil samples from the same areas those were not exposed to herbicide designated as soil 'B' were taken. At all the sites MBC, MBN and MBP ranged from 131 to 457, 1.22 to 13.1 and 0.59 to 3.70 µg g-1 in the contaminated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Buctril super; Bacteria; Effect; Population.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100002

Effects of Sodium Nitrate and Mixotrophic Culture on Biomass and Lipid Production in Hypersaline Microalgae Dunaliella Viridis Teod
Provedor de dados: 52
Autores: Kharati-Koupaei,Mansour; Moradshahi,Ali.
To access the potential application of Dunaliella viridis Teod. for biofuel production, the effects of culture media composition on biomass and lipid content of this microalgae were investigated. Measured at the 20 th day, sodium nitrate at 5.0 mM augmented biomass production by 26.5 percent compared to control (1 mM sodium nitrate). Total lipids expressed as µg mL-1 of culture also increased with increase in nitrate concentration up to 5.0 mM sodium nitrate, whereas when expressed on the per cell basis, total lipids stayed relatively constant at most of the tested nitrate concentrations except at 0.5 mM which was 31.4 percent higher compared to 1.0 mM nitrate. At 5.0 mM sodium nitrate, by using 20 g L-1 of glucose in mixotrophic culture of D. viridis,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dunaliella viridis; Mixotrophic culture; Biofuel; Biomass; Lipid content; Hormones.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100201

Enhanced biosynthesis of quercetin occurs as A photoprotective measure in Lycopersicon esculentum mill. under Acute UV-B exposure
Provedor de dados: 52
Autores: Shourie,Abhilasha; Tomar,Pushpa; Srivastava,Deepika; Chauhan,Rahul.
Lycopersicon esculentum respond to UV-B by enhanced synthesis of flavonoid quercetin, a strong antioxidant that helps the plants to well acclimatize to UV-B stress. Three weeks old plants of L. esculentum were subjected to acute UV-B irradiation for 20, 40 and 60 minutes daily until 28 days and analyzed for the morphological and biochemical changes. UV-B exposure for 40 and 60 minutes considerably affected the growth and biomass of L. esculentum. The leaves were deformed, developed chlorosis and abscised early as compared to the unexposed plants. Biomass declined by 35% and total chlorophyll decreased by 24.7% due to disintegration of chloroplasts. Enhancement was seen in the content of carotenoids, anthocyanins and total flavonoids by 15, 33.3 and 22.8%,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: UV-B; Lycopersicon esculentum; Quercetin; Biomass; Pigments; Anthocyanins.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000300002

Influence of static magnetic fields on S. cerevisae biomass growth
Provedor de dados: 52
Autores: Muniz,João B.; Marcelino,Milton; Motta,Mauricio da; Schuler,Alexandre; Motta,Mauricy Alves da.
Biomass growth of Saccharomyces cerevisiae DAUFPE-1012 was studied in eight batch fermentations exposed to steady magnetic fields (SMF) running at 23ºC (± 1ºC), for 24 h in a double cylindrical tube reactor with synchronic agitation. For every batch, one tube was exposed to 220mT flow intensity SMF, produced by NdFeB rod magnets attached diametrically opposed (N to S) magnets on one tube. In the other tube, without magnets, the fermentation occurred in the same conditions. The biomass growth in culture (yeast extract + glucose 2%) was monitored by spectrometry to obtain the absorbance and later, the corresponding cell dry weight. The culture glucose concentration was monitored every two hours so as the pH, which was maintained between 4 and 5. As a result,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: S. cerevisiae; Biomass; Magnetic fields; Fermentation.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300017

Effects of culture conditions on the production of inulinase by Kluyveromyces marxianus
Provedor de dados: 52
Autores: Cazetta,Marcia Luciana; Monti,Rubens; Contiero,Jonas.
The present study was conducted to investigate the influence of initial sucrose concentration, pH and aeration rate on biomass and inulinase production by Kluyveromyces marxianus var. bulgaricus in a stirred batch reactor. Maximum inulinase activity (15.29 UmL-1) was obtained at a sucrose concentration of 10 g L-1, pH 5.0 and aeration rate of 1 vvm. The 20 g L-1 sucrose concentration was suitable for cell growth; however, enzymatic activity at this concentration was inhibited due to catabolic repression. The increase in aeration rate caused a reduction in enzyme activity with no relevant biomass increase.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Kluyveromyces marxianus var. bulgaricus; Sucrose; Inulinase; Biomass; Batch fermentation.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300027

Isolation of diuron-degrading bacteria from treated soil
Provedor de dados: 52
Autores: Dellamatrice,Priscila Maria; Monteiro,Regina Teresa Rosim.
Studies were carried out on the isolation of diuron-degrading bacteria from treated soil. The mineralization of 14C-diuron in soil following a three-year application and in soil without previous application were 68.95 mug.100 g-1 and 24.16 mug.100 g-1, respectively, after a 64-day incubation period. In the first soil there was a significant increase in the number of bacteria, from 3.3 x 10 6 to 1.9 x 10(8). The microbial biomass did not change, however, a significant 14C-residue of diuron was found in the microbial biomass. A consortium of three bacteria, Acinetobacter johnsonii and two Bacillus spp., was isolated in medium containing diuron as the only carbon source. Only A. johnsonii was able to grow alone in medium with diuron as the only carbon source.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodegradation; Biomass; Enhanced degradation; Diuron; Acinetobacter; Bioremediation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600020

Physicochemical Characteristics of Oil Obtained from the Treatment of Poultry Abattoir Effluents and its Potential for Biodiesel Production
Provedor de dados: 52
Autores: Kunh,Sheila Simone; Mantovan,Fabiana de Marqui; Milinsk,Maria Cristina; Alves,Helton José.
ABSTRACT Sludge oil derived from the effluent generated in poultry abattoirs offers a promising biomass for the production of biodiesel. In this work, determination was made of its physicochemical characteristics, including acidity, density at 20ºC, peroxide index, moisture content, and saponification index, together with evaluation of a route for its conversion to biodiesel.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oil sludge; Biomass; Biodiesel; Renewable energy sources; Abattoir effluents.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000200212

New geometric models for calculation of microalgal biovolume
Provedor de dados: 52
Autores: Konoplya,Bárbara Idino; Soares,Francisco Striquer.
Biovolume calculation of micro algae is commonly used for the assessment in relative abundance (as biomass or carbon) of coexistent algae that vary in shape and/or size. Periphyton samples were obtained within a more general program, in fishery tanks and streams situated in the upper basin region of Tibagi River, nearby Londrina, Paraná state, south of Brazil. The present work proposes new algorithms for the determination of algal species volume. Results showed that Gyrosigma scalproides (Rabenhorst) Cleve 1894 and Tetraedron gracile (Reinsch) Hansgirg 1889 were exceptions inside their genus and the present new formula for biovolume and area gives more adequate results. In addition, new formulas applied for Phacus longicauda (Ehrenberg) Dujardin 1841 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biovolume; Geometric models; Biomass; Micro algae.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000300014

Multi-criteria Selection of Distributed Mini Generation Systems Using Rice Husk
Provedor de dados: 52
Autores: Costa,Alexandre Kunkel da; Farret,Felix Alberto; Trennepohl,Felipe Alex.
ABSTRACT This paper presents a multi-criteria methodology to support decision making for management and selection of distributed mini generation sources (GD) using rice husk. Considering the potential of residual biomass, the developed model is based on the Analytic Hierarchy Process (AHP) method to evaluate the main technological arrangements of generation against the technical, economical, social-environmental aspects. Considering the possibility of energy transformation of rice husk, the following alternatives for distributed mini generation are considered: steam turbine, gas turbine, micro turbine, fuel cells, alternative combustion engine and Stirling engine. Regarding the evaluation aspects, it is defined energy efficiency, environmental impacts,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Rice husk; Distributed mini generation; Multi-criteria selection; AHP.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000200201

Use of Coffee Capsules as Support Material in Upflow Anaerobic Fixed Bed Reactors
Provedor de dados: 52
Autores: Souza,Gabriela Rezende de; Oliveira,Luiz Fernando Coutinho de; Bello,Italoema Pinheiro; Siniscalchi,Luciene Alves Batista; Fia,Ronaldo; Gandia,Rômulo Marçal.
Abstract The aim of this work is to evaluate the performance of upflow anaerobic fixed bed reactors filled with espresso coffee capsules to treat sanitary sewage. Three reactors (R1, R2 and R3) were constructed in blue PVC pipes measuring 30 cm height and 150 mm diameter and filled with coffee capsules made of aluminum and plastic. The sewage from the pre-treatment phase of the wastewater treatment plant of the Federal University of Lavras fed the system. Temperature, pH, alkalinity and volatile acids concentration, COD, TS, TVS and TSS of the influent and effluent were analyzed to evaluate the reactors performances. Statistics tests were run in the software Statistica 10. Changes occurred in the organic loading rates caused two different operating phases,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic filter; Biomass; Immobilization; Support material; Domestic sewage.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100223

Microphytobenthic primary production, biomass, nutrients and pollutants of Santos Estuary (24ºS, 46º20'W). São Paulo, Brazil
Provedor de dados: 52
Autores: Sousa,Eduinetty Ceci Pereira Moreira de; Tommasi,Luiz Roberto; David,Carlos João.
The present study aimed to evaluate the seasonal variation of microphytobenthic biomass and its primary production in the intertidal zone in Santos Estuary (São Paulo, Brazil). This estuary is on the tropical region and it is regarded as a polluted area. The samples were collected at 3 sites, and environmental parameters, nutrients and heavy metals were analyzed. The primary production was evaluated according to GRφNTVED (1960) method whereas chlorophyll a and phaeopigment a were estimated by TETT et al. (1975) method. Total nitrogen K ranged from 20.0 to 115.0 µg·g-1 while total phosphate ranged from 26.0 to 223.0 µg·g-1. No significant seasonal variation of benthic primary production or chlorophyll a and phaeopigment a were observed. Significant positive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Primary production; Microphytobenthic; Intertidal; Pollutants; Biomassa; Produção primária; Microfitobentos; Entremarés; Poluentes.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000100004

Influence of water level fluctuation on the mortality and aboveground biomass of the aquatic macrophyte Eleocharis interstincta (VAHL) roemer et schults
Provedor de dados: 52
Autores: Santos,Anderson Medeiros dos; Esteves,Francisco de Assis.
The goal of this study was to study the biometric alterations of Eleocharis interstincta in response to water level fluctuations in Cabiúnas Lagoon, located on the northern coast of the state of Rio de Janeiro, in the municipality of Macaé. Three quadrats of 0.0625 m² were harvested every two weeks from June/1997 to June/1998; samples were separated into stems, dead stems (detritus) and rhizome; lenghted, dried and weighted. The water level fluctuated seasonally in the macrophyte stand with two periods of drawdown. The first period occurred naturally at the end of winter and beginning of spring, when rainfall in the area was normally lowest. The second period of drawdown was the result of an artificial breaching of the sandbar that isolate the lagoon from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic macrophytes; Biomass; Coastal lagoon; Eleocharis interstincta; Water level fluctuation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000200016

Computational algorithm for stability analysis of distribution networks with distributed generation
Provedor de dados: 52
Autores: Weigert,Gabriela Rosalee; Gurski,Erico; Benedito,Raphael Augusto de Souza.
Abstract With the insertion of distributed generation in distribution networks, security analysis becomes crucial, in islanded operation or when the system is connected to the grid. Dynamic stability analyses are necessary in order to achieve minimum levels of security and reliability. Such analyses are obtained through the solution of the algebraic-differential set of equations that model the distribution grid and their generators, which requires numerical solution methods. Therefore, this paper presents a computational tool for transient stability and large disturbance frequency stability analysis, considering distribution systems with the insertion of biomass-fed distributed generation, which may, or may not, have speed regulation systems. The presented...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Distributed generation; Biomass; Dynamic stability; Speed regulator; Islanded operation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000200209

Homeopathic and larvicide effect of Eucalyptus cinerea essential oil against Aedes aegypti
Provedor de dados: 52
Autores: Cavalca,Patrícia Aparecida Mançano; Lolis,Maria Isabel Gomes de Assumpção; Reis,Bruno; Bonato,Carlos Moacir.
The aim of this work to study the homeopathic and larvicide effect of Eucalyptus cinerea essential oil on Aedes aegypti. Essential oil had high larvicide effect with LC50 and LC90 of 0.38 and 0.27 mg mL-1, respectively. Generally, the homeopathy of essential oil affected the A. aegypti development stages. Dynamizations 6CH, 9CH and 12CH reduced the mean number of larvae when compared to that of control. Mean number of mosquitoes decreased through homeopathic dynamization 30CH. Results showed that E. cinerea essential oil was highly promising and could be used in public health system for the control of A. aegypti.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ultra-diluted; Secondary metabolism; Biomass; Homeopathic drugs.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400012

Seasonal and spatial distribution of Bacterioplankton in a fluvial-lagunar system of a tropical region: density, biomass, cellular volume and morphologic variation
Provedor de dados: 52
Autores: Araújo,Magnólia Fernandes Florêncio de; Godinho,Mirna Januária Leal.
The temporal and spatial fluctuations of Bacterioplankton in a fluvial-lagunar system of a tropical region (Pitimbu River and Jiqui Lake, RN) were studied during the dry and the rainy periods. The bacterial abundance varied from 2.67 to 5.1 Cells10(7)mL-1 and did not show a typical temporal variation, presenting only small oscillations between the rainy and the dry periods. The bacterial biomass varied from 123 µgC L-1 to 269 µgC L-1 in the sampling sites and the average cellular volume varied from 0.12 to 0.54µm³, showing a predominance of the rods. The temperature showed a positive correlation with the cellular volume of the rods (R=0.55; p=0.02) and vibrio (R=0.53; p=0.03). Significant spatial differences of biomass (Mann Whitney: p=0.01) and cellular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterioplankton; Biomass; Morphologic variation; Tropical environment.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100024

Chemical composition of Rhodocyclus gelatinosus biomass produced in poultry slaughterhouse wastewater
Provedor de dados: 52
Autores: Ponsano,Elisa Helena Giglio; Lacava,Pedro Magalhães; Pinto,Marcos Franke.
Rhodocyclus gelatinosus R1 grew photoautotrophically in poultry slaughterhouse wastewater inside glass columns (90x670 mm) during 7 days at 31 ± 4ºC, under anaerobiosis and lightness supplied by daylight plus 3 (100W) incandescent and 4 (40W) fluorescent lamps. The culture was centrifuged (4,500xg/20 min) and lyophilized to originate a bacterial biomass with 7.1% moisture content. Chemical composition investigation showed 67.6% crude protein, 27.6% total carbohydrate, 0.6% lipids and 4.2% ash (dry weight). Amino acid composition of the biomass was similar to others described in the literature for Rhodocyclus gelatinosus and for other photosynthetic bacteria. Effluent COD removal after cultivation and elimination of the biomass was around 90%. The valuable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhodocyclus gelatinosus; Biomass; Poultry slaughterhouse wastewater; Chemical composition; Amino acid composition; COD removal.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200001

Variaciones espaciales y temporales del fitoplancton en un lago subtropical de Argentina
Provedor de dados: 57
Autores: ZALOCAR DE DOMITROVIC,YOLANDA; ASSELBORN,VIVIANA M.; CASCO,SYLVINA L.
Species composition, biomass and diversity of the phytoplankton in a subtropical lake (27°29'S; 58°45'W) were studied from February 1995 to March 1996. One or two samples were taken monthly in the limnetic and the littoral area. Cell counts were done by the Utermöhl method (1958). Phytoplankton biomass varied among 2.38 and 45.59 mm³.m-2 with a mean value of 12.11 (±10.52) mm³.m-2. The population density oscillated among 0.3x10(6) and 4.7x10(6) ind.cm-2. Cyanophyta was the dominant group all the year contributing among 25% and 83% of the total biomass. Cylindrospermopsis raciborskii, Aphanizomenon sp. and Microcystis aeruginosa were the dominant species. The Chlorophyta, second group in importance, contributed among 8% and 50% being Botryococcus braunii...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Subtropical lake; Phytoplankton; Composition; Biomass; Diversity.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000300003

The water level influence on biomass of Echinochloa polystachya (Poaceae) in the Jurumirim Reservoir (São Paulo, Brazil)
Provedor de dados: 57
Autores: POMPÊO,M. L. M.; HENRY,R.; MOSCHINI-CARLOS,V.
In the Paranapanema River mouth, Jurumirim Reservoir (23°27'-23°29'S and 48°39'-48°36'W, SP, Brazil), the biomass of E. polystachya was monthly determined with eight quadrats of 0.25 m² from August 1993 to July 1994. The seasonal variation in biomass was unimodal, with greater biomass from November 1993 to April 1994. The average biomass was 1,933.7 ± 479.5 gDW.m-2, with a variation along the year from 1,149.0 to 2,755.9 gDW.m-2. The annual variation of aerial green biomass, aerial and aquatic detritus suggest that the main growth period of E. polystachya was from December 1993 to May 1994, with peak between February to March 1994. The data indicate that this macrophyte is adapted to water level variation.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macrophyte; Echinochloa; Biomass; Water level variation; Reservoir; Poaceae.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100004

Biomass smoke COPD has less tomographic abnormalities but worse hypoxemia compared with tobacco COPD
Provedor de dados: 56
Autores: Meneghini,A.C.; Koenigkam-Santos,M.; Pereira,M.C.; Tonidandel,P.R.; Terra-Filho,J.; Cunha,F.Q.; Menezes,M.B. de; Vianna,E.O.
Special attention has emerged towards biomass smoke-induced chronic obstructive pulmonary disease (COPD), providing new knowledge for prevention and therapeutic approach of non-smoker COPD patients. However, the understanding of biomass smoke COPD is still limited and somewhat controversial. The aim of the present study was to compare COPD exclusively caused by tobacco smoking with COPD exclusively caused by environmental or occupational exposures. For this cross-sectional study, COPD patients were recruited from outpatient clinics and formed two groups: non-smoker COPD group (n=16) with exposure to biomass smoke who did not smoke cigarette and tobacco smoker COPD group (n=15) with people who did not report biomass smoke exposure. Subjects underwent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chronic obstructive pulmonary disease; Biomass; Tobacco.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000500601

Evaluation of pasture soil productivity in the semi-arid zone of Brazil by microbial analyses
Provedor de dados: 58
Autores: Luna,Rômulo Gil de; Coutinho,Henrique Douglas Melo; Grisi,Breno Machado.
The productivity of a pasture soil (caatinga) located in the region of São João do Cariri, PB, Brazil was evaluated based an the following microbiological parameters: biomass (measured by fumigation-incubation method), activity (estimated from basal respiration and cellulose decomposition rate), qCO2, and Cmic : Corg ratio. This analysis demonstrated that livestock management in the 'caatinga' is probably causing environment damage by affecting the soil properties, reducing the microbial biomass and soil respiration and increasing the qCO2, affecting the recovery of this ecosystem.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Semi-arid; Biomass; Microbial activity; Pasture; Caatinga.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300001

A novel method to optimize culture conditions for biomass and sporulation of the entomopathogenic fungus Beauveria Bassiana IBC1201
Provedor de dados: 58
Autores: Gao,Li.
Biomass yields and sporulation of Beauveria bassiana was concerned on culture conditions, environmental factors and cultivation method. We optimized the best culture conditions for biomass yields of B. bassiana IBC1201 with the novel "two-stage" cultivation method as well as orthogonal matrix method. Firstly, we cultured spore suspension on the basal medium (sucrose 19.00 g, soy peptone 4.06 g, K2HPO4 1.00 g, KCl 0.50 g, MgSO4 0.50 g, FeSO4 0.10 g and 17.00 g Bactor) for the first stage culture of 4 days under room condition. Then, we transferred them to another defined medium (Cellobiose 9.52 g, urea 1.70 g, ZnSO4•7H2O 0.05 g/L, MnSO4•H2O 0.005 g/L, CaCl2 1.00 g/L, CuSO4•5H2O 0.05 g/L and 17.00 g Bactor) for more 4 days cultivation with the environmental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrition; Environment; Biomass; Sporulation; Beauveria bassiana.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000400045

Yeast biomass production: a new approach in glucose-limited feeding strategy
Provedor de dados: 58
Autores: Vieira,Érika Durão; Andrietta,Maria da Graça Stupiello; Andrietta,Silvio Roberto.
The aim of this work was to implement experimentally a simple glucose-limited feeding strategy for yeast biomass production in a bubble column reactor based on a spreadsheet simulator suitable for industrial application. In biomass production process using Saccharomyces cerevisiae strains, one of the constraints is the strong tendency of these species to metabolize sugars anaerobically due to catabolite repression, leading to low values of biomass yield on substrate. The usual strategy to control this metabolic tendency is the use of a fed-batch process in which where the sugar source is fed incrementally and total sugar concentration in broth is maintained below a determined value. The simulator presented in this work was developed to control molasses...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yeast; Biomass; Fed-batch; Process simulation; Saccharomyces cerevisiae.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000200035

Physiological disturbances promoted by ozone in five cultivars of Phaseolus vulgaris L.
Provedor de dados: 61
Autores: Clebsch,Cláudia C.; Divan Junior,Armando M.; Oliveira,Paulo L.; Nicolau,Márcio.
Bean seedlings of Fepagro 26, Guapo Brilhante, Iraí, Macotaço and US Pinto 111 cultivars were submitted to treatments with or without addition of ozone to the ambient air, in order to evaluate the effects of exposure on photosynthesis, relative electrolyte leakage, foliar abscission and biomass of the seedlings. Exposure to ozone caused significant decreases in the net assimilation of all cultivars except Iraí. It also caused a significant increase in electrolyte leakage from the Pinto cultivar, but only when AOT40 was the highest. It also produced significant anticipation in the time of foliar abscission in the Pinto, Fepagro and Guapo cultivars. The variability observed in the biomass measurements reflected the limitations to perform long-term...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Photosynthesis; Relative electrolyte leakage; Foliar abscission; Biomass.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000400008

Moderate warm temperature improves shoot growth, affects carbohydrate status and stimulates photosynthesis of sweet orange plants
Provedor de dados: 61
Autores: Ribeiro,Rafael Vasconcelos; Machado,Eduardo Caruso; Espinoza-Núñez,Erick; Ramos,Rômulo Augusto; Machado,Daniela Favero São Pedro.
Citrus plants were grown under two thermal conditions for evaluating carbon metabolism acclimation to moderate warm temperature (30/20ºC, day/night), and its likely impact on plant growth. As reference, plants were grown at 25/20ºC, in which they were subjected to optimum temperature for photosynthesis during the diurnal period (25ºC). Higher photosynthetic rates were found at 30/20ºC as compared to 25/20ºC in both mature and young leaves, being this response associated with higher stomatal conductance. After 30 days of thermal treatment, plants grown at 30/20ºC presented higher shoot growth as compared to those at 25/20ºC. The carbohydrate concentration decreased in stem and root tissues, while it increased in leaf tissues under moderate warm conditions....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus; Biomass; Carbohydrate; Leaf gas exchange; Acclimation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000100006

Interactive effects between supplemental ultraviolet-B radiation and heavy metals on the growth and biochemical characteristics of Spinacia oleracea L.
Provedor de dados: 61
Autores: Shweta,Mishra; Agrawal,S.B.
The impact of supplemental UV-B (sUV-B) radiation and heavy metals: Cd (68 µmol.kg-1 soil) and Ni (68 µmol.kg-1 soil) singly and in combination was studied on photosynthetic and non-photosynthetic pigments, metabolites, enzyme activities, biomass accumulation and the net primary productivity of spinach (Spinacia oleracea L. var. All Green), a common leafy vegetable plant. Both the stresses individually and in combination resulted in the reduction of photosynthetic pigments, ascorbic acid, and catalase activity, whereas a reverse trend was observed for anthocyanin, flavonoids and proline content, lipid peroxidation and peroxidase activity. The interactive effects of both the stresses were, however, less than additive. Combined treatment of sUV-B + Cd was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spinaicia oleracea; Biomass; Cadmium; Enzymes; Nickel; Pigments; Ultraviolet-B.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200007

Genotype × Environment Interaction in Canola (Brassica napus L.) Seed Yield in Chile
Provedor de dados: 117
Autores: Escobar,Magaly; Berti,Marisol; Matus,Iván; Tapia,Maritza; Johnson,Burton.
Genotype x environment (G × E) interaction in canola (Brassica napus L.) cultivar seed yield is unknown in Chile. The interaction was performed with the SREG (Sites Regression) model. Two experiments were conducted in five and thirteen environments in the 2008-2009 season in Central South Chile. The experimental design was a randomized complete block (RCBD) in each environment with four replicates and 26 open-pollinated or hybrid canola genotypes in Experiment 1, and RCBD with three replicates and 17 genotypes in Experiment 2. ANOVA was used to determine the significance of the G × E interaction. biplots were used to graphically interpret and determine the best cultivar in each environment and the corresponding mega-environments. The G × E interaction was...
Tipo: Journal article
Palavras-chave: SREG; GGE; MET; Interaction; Biomass.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200001

Estimating the bioenergy potential of Pinus radiata plantations in Chile
Provedor de dados: 118
Autores: Acuña,Eduardo; Espinosa,Miguel; Cancino,Jorge; Rubilar,Rafael; Muñoz,Fernando.
The bioenergy potential for electricity and ethanol production of Pinus radiata D. Don plantations in Chile was modeled, on a regional basis, using radiata pine plantations areas by age class. Wood basic density equations based on age and growing region, wood moisture content variability, and the effciency of a hypothetical power plant were used to estimate the amount of electricity produced by biomass at harvesting age including logging residues. Bioethanol yield was estimated at 275 L t-1 of dry biomass. The uncertainty of the bioenergy production were analyzed using probabilistic distribution functions and an estimate of 1.83 million ha-1 of radiata pine plantations by year 2030. Parameters considered for the uncertainty analyses included the rotation...
Tipo: Journal article
Palavras-chave: Bioenergy; Bioethanol; Biomass; Radiata pine; Logging residues; Monte Carlo simulation.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000100009

The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolids
Provedor de dados: 118
Autores: Donoso,Sergio; Peña-Rojas,Karen; Pacheco,Cristian; Durán,Sergio; Santelices,Rómulo; Mascaró,Cristóbal.
Acacia caven (Mol.) Mol. (Leguminosae), generally known as "espino," is one of the most common tree species in the Mediterranean region of Chile. This species grows in nutritionally poor soils with low water availability during the summer, so it is very difficult for new seedlings to become established. To investigate the effects of water restriction and the potential benefit of the application of biosolids (sludge bio-dried to 25% moisture) on the growth of the plant, a completely random, two x three factorial design was carried out in controlled nursery conditions under two irrigation regimes (well-watered plants and controlled water restriction) and three biosolid application rates (0:100, 10:90 and 20:80) in a clay substrate. Physiological evaluations...
Tipo: Journal article
Palavras-chave: Biomass; Predawn water potential; Photosynthesis; Shoot:root ratio; Water restriction.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200013

Growth and essential oil production by Martianthus leucocephalus grown under the edaphoclimatic conditions of Feira de Santana, Bahia, Brazil
Provedor de dados: 65
Autores: Azevedo,Bianca Oliveira de; Oliveira,Lenaldo Muniz de; Lucchese,Angélica Maria; Silva,Daniel de Jesus da; Ledo,Carlos Alberto da Silva; Nascimento,Marilza Neves do.
ABSTRACT: The semiarid region of Brazil holds a great richness of medicinal and aromatic plants with considerable potential for pharmaceutical, food, cosmetic and biopesticide industries. Martianthus leucocephalus (Mart. Ex Benth.) J. F. B. Pastore is endemic to this region, and its essential oils contain a principle compound, isobornyl formate, which demonstrates antimicrobial activity against Bacilus cereus, Staphylococcus aureus and Candida albicans. In spite of its significant pharmacological potential, little is known about its growth. In light of the influence of seasonality on plant growth, development, and secondary metabolism, the present study evaluated the growth and essential oil content of M. leucocephalus grown and harvested during different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Semiarid region; Terpenes; Biomass; Endemic medicinal plant; Hyptis leucocephala.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000400593

Deterioration and fermentability of energy cane juice
Provedor de dados: 65
Autores: Ceccato-Antonini,Sandra Regina; Bassi,Ana Paula Guarnieri; Paraluppi,Anna Livia; Santos,Eder Gustavo Dias dos; Matsuoka,Sizuo.
ABSTRACT: The main interest in the energy cane is the bioenergy production from the bagasse. The juice obtained after the cane milling may constitute a feedstock for the first-generation ethanol units; however, little attention has been dedicated to this issue. In order to verify the feasibility of the energy cane juice as substrate for ethanol production, the objectives of this research were first to determine the microbiological characteristics and deterioration along the time of the juices from two clones of energy cane (Type I) and second, their fermentability as feedstock for utilization in ethanol distilleries. There was a clear differentiation in the bacterial and yeast development of the sugarcane juices assayed, being much faster in the energy...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergy; Biomass; Renewable energy; Ethanol 1G.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000900751

Age and tree spacing and their effects on energy properties of Ateleia glazioviana
Provedor de dados: 65
Autores: Eloy,Elder; Silva,Dimas Agostinho da; Caron,Braulio Otomar; Elli,Elvis Felipe; Schwerz,Felipe.
ABSTRACT: The use of wood for energy purposes is common in Brazil, motivated mainly by the diversity of species that present a potential for energy production. The objective of this study was to determine the effects of tree age and spacing on the energy properties of different components of the biomass: wood, bark, and branch of the species Ateleia glazioviana Baill, distributed at different spacings: 2.0 × 1.0m, 2.0 × 1.5m, 3.0 × 1.0m, and 3.0 × 1.5m in the 1st, 3rd, and 5th year after the planting. The experiment was carried out in a randomized complete block design with three replications. The following variables were determined: biomass (BIO), gross calorific power (GCV), basic density (BD), energy productivity (EP), energy density (ED), fixed carbon...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Timbó; Biomass; Gross calorific power; Energy productivity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000900154

Oxidative stability of tilapia feeds containing Saccharomyces cerevisiae and Spirulina platensis
Provedor de dados: 65
Autores: Grassi,Thiago Luís Magnani; Sedlacek-Bassani,Juliana; Ponsano,Elisa Helena Giglio.
ABSTRACT:  The aim of this study was to evaluate the effect of the inclusion of microbial biomass on the oxidative rancidity of tilapia rations stored for 12 months. Treatments included a control diet and diets supplemented with either 0.01% vitamin E, 0.25 and 0.5% of Saccharomyces cerevisiae and 0.25 and 0.5% of Spirulina platensis. Experimental diets were stored in the dark inside plastic bags at room temperature (25 °C) for 12 months. The oxidative rancidity was measured as thiobarbituric acid reactive substances (TBARS). It was concluded that the inclusions of Spirulina platensis at 0.25% (1.734 ± 0.206) and 0.5% (1.629 ± 0.181) and Saccharomyces cerevisiae at 0.5% (1.459 ± 0.305) minimized the oxidative rancidity in comparation to control diet (2.843...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Lipid oxidation; Ratio; TBARS.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000100652

Changes caused by heavy metals in micronutrient content and antioxidant system of forage grasses used for phytoremediation: an overview
Provedor de dados: 65
Autores: Rabêlo,Flávio Henrique Silveira; Borgo,Lucélia.
ABSTRACT: An increase in the content of heavy metals in the environment causes many socio-environmental problems, and phytoremediation is a tool to reduce the environmental impact caused by these elements, with prospects for the use of forage grasses. This group of plants features characteristics for the environment-decontamination process, but further studies are necessary about the damages caused by heavy metals on the uptake of cationic micronutrients and on the antioxidant system, which are essential processes for the growth of plants in contaminated sites. Exposure of forage grasses to heavy metals results in a lower content of Mn in the shoots of almost all plants, but the contents of Cu, Fe, and Zn vary according to heavy metal and forage grass....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Nutritional status; Oxidative stress; Environmental pollution.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000801368

Biomass and carbon stock from  Pinus  caribaea var.  hondurensis under homogenous stands in southwest Bahia, Brazil
Provedor de dados: 65
Autores: Lima,Máida Cynthia Duca de; Barreto-Garcia,Patrícia Anjos Bittencourt; Sanquetta,Carlos Roberto; Novaes,Adalberto Brito de; Melo,Lara Clímaco de.
ABSTRACT: There is a large number of studies evaluating methods to quantify biomass for the genus Pinus in different regions of Brazil. However, knowledge about this subject in the Northeast region of Brazil is still incipient. The objective of the present study was to assess the biomass and carbon stocks and select mathematical models to estimate these variables in Pinus caribaea var. hondurensis , which is established in homogenous stands in the Southwest region of the state of Bahia (Brazil). The biomass was quantified using the destructive method. Samples of needles, bole, bark, and branches were analyzed to determine their carbon contents. Ten models were tested, and the best of them were chosen based on the following statistical indicators: adjusted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Exotic forest species; Mathematical models; Biomass.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000600957

Use of coffee (Coffea arabica) pulp for the production of briquettes and pellets for heat generation
Provedor de dados: 64
Autores: Cubero-Abarca,Robert; Moya,Roger; Valaret,Jorre; Tomazello Filho,Mario.
Coffee bean (Coffea arabica) processing generates high amount of residues that are sources of environmental pollution. Therefore, an appropriate solution is needed. The objective of this study was to determine the potential of coffee pulp to produce briquettes and pellets. The study included pulp drying (using air, solar and hot air methods); the production of briquettes and pellets; the evaluation of their energy, physical and mechanical properties; and the evaluation of pellet quality using X-ray densitometry. The results showed that the pulp presented an initial moisture content of 90%, resulting in drying times of 699, 308 and 55 hours for air, solar and hot air drying, respectively, and the calorific values of the pellets and briquettes were 12,501 kJ...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffee residues; Drying; Coffee processing; Biomass; Bio-resources.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000500005

Cell suspension culture as a means to produce polyphenols from date palm (Phoenix dactylifera L.)
Provedor de dados: 64
Autores: Naik,Poornananda Madhava; Al-Khayri,Jameel Mohammed.
ABSTRACT Date palm accumulates a wide range of secondary metabolites high in nutritional and therapeutic value. In the present study, date palm (Phoenix dactylifera L., cv. Shaishi) shoot-tip-induced callus was used to establish cell suspension cultures in Murashige and Skoog (MS) liquid medium containing 1.5 mg L-1 2-isopentenyladenine (2iP) and 10 mg L-1 naphthaleneacetic acid (NAA). To study the growth kinetics, cultures were maintained for 12 weeks during which weekly measurements were carried out to determine the biomass accumulation based on packed cell volume (%), fresh weight and dry weight (g). In addition, weekly determination of polyphenols (catechin, caffeic acid, kaempferol, and apigenin) was carried out using high performance liquid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Growth curve; Packed cell volume.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000500464