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| Registros recuperados: 145 | |
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| Van der Lingen, C.D.; Kreiner, A.; Fréon, P.. |
| Time-series of condition factor (CF) and gonadosomatic index (GSI) were generated using general linear models (GLM) for sardine Sardinops sagax stocks in the northern and southern Benguela ecosystems over the period 1984–1999. During this period the biomass of sardine in the northern Benguela remained at relatively low levels of <500 000 tons, whereas that of southern Benguela sardine increased 40-fold to 1.3 million tons. The GLMs explained 27 and 45% of the observed variation in CF, and 32 and 28% of the observed variation in GSI, for sardine in the northern and southern Benguela subsystems respectively. Whereas the sardine CF in the northern Benguela remained stable over time, that for the southern Benguela stock declined steadily during the study... |
| Tipo: Journal Contribution |
Palavras-chave: Abstracts; Ecosystems; Sardine fisheries; Ecosystems; Http://aims.fao.org/aos/agrovoc/c_2482. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/2124 |
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| Sarrazin, Jozee; Sarradin, Pierre-marie; Buffier, Erick; Christophe, Alain; Clodic, Guillaume; Desbruyeres, Damien; Fouquet, Yves; Gouillou, Michel; Jannez, Michel; Le Fur, Yann; Le Rest, Jacques; Lecornu, Fabrice; Lefort, Olivier; Lux, Stephanie; Millet, Brigitte; Guillemet, Pascal. |
| The Momareto cruise was held from August 6 to September 6, 2006 on the new French oceanographic vessel Pourquoi pas? The ROV Victor 6000 visited three vent fields, ranging from 850m to 2300m, on the Mid-Atlantic Ridge. The scientific objective of the cruise was to study the spatial and temporal dynamics of hydrothermal communities colonizing these active vent sites. Aside scientific and technological objectives, one of the major goals of this cruise was to share the excitement of our science with the public. For this, the results of the project were shared through different media. The most challenging and exciting communication event remains the real-time transmission of images acquired by the ROV Victor at 1700m depth to a 250 person audience on land. |
| Tipo: Text |
Palavras-chave: Deep-sea; Ecosystems; Outreach; Real-time. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3599.pdf |
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| Sione,Silvana M. J.; Andrade-Castañeda,Hernán J.; Ledesma,Silvia G.; Rosenberger,Leandro J.; Oszust,José D.; Wilson,Marcelo G.. |
| ABSTRACT Estimation of carbon stored in forest ecosystems requires accurate biomass prediction tools. The objective of this study was to determine the individual aerial biomass of Prosopis affinis and its distribution by component, to develop allometric models for the estimation of biomass and to estimate biomass expansion factors (BEF) in native forests of Entre Ríos (Argentina). Dendrometric variables on 30 individuals of different diameter classes were measured. Values of total aerial biomass and component biomass (trunk, branches larger than 5 cm in diameter and branches smaller than 5 cm + leaves, flowers and fruits) were determined using the destructive method. Different models were developed, and the best models were selected according to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon reservoir; Ecosystems; Fabaceae. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000600467 |
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| The Benguela Current Large Marine Ecosystem (BCLME) flanks the coastal areas of Angola, Namibia and South Africa, representing a unique upwelling ecosystem. Striving to establish effective management of the BCLME, the BCLME Programme is a multi-sectoral initiative funded by the Global Environment Facility (GEF) and further financial and in-kind contributions from the three member countries. The United Nations Development Programme (UNDP) implements the Programme and the United Nations Office for Project Services (UNOPS) is the executing agency. Communities in the coastal areas of Angola, Namibia and South Africa depend on the coastal and inshore resource for their survival and livelihood and therefore have a large stake in the management of this Large... |
| Tipo: Working Paper |
Palavras-chave: Ecosystems; Upwelling. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/372 |
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| Fabré, N.N.. |
| Los lenguados constituyen un importante recurso pesquero en el Mar Argentino. Más que en los volúmenes desembarcados (9 .731 t en 1991), esta importancia se centra en su elevado valor de comercialización debido a la alta calidad de su carne. Atendiendo a los desembarques totales realizados en el Mercado de Concentración Pesquera de Mar del Plata, los lenguados ocupan el octavo lugar. Estos desembarques están compuestos principalmente por especies de porte mediano a grande pertenecientes al género Paralichthys, y por ejemplares de tamaño mediano o pequeño de las especies Xystreuris rasile, y en menor proporción, Paralichthys isosceles. Este recurso es explotado, en el sector bonaerense, por las flotas de rada o ría y costera, mientras que la flota de altura... |
| Tipo: Theses and Dissertations |
Palavras-chave: Geographical distribution; Population dynamics; Population structure; Growth; Reproduction; Mortality; Environmental effects; Ecosystems; Marine fish. |
| Ano: 1992 |
URL: http://hdl.handle.net/1834/5158 |
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| Apín, Y. C.; Gómez, L. M.. |
| Se ofrece una compilación de los materiales existentes sobre el status de la biodiversidad del municipio Guamá. Las principales problemáticas ambientales son: la antropización producto de migraciones incontroladas de la población hacia las áreas próximas a la línea de costa, vertimientos de desechos sólidos y líquidos en playas y ríos, deficiente red de alcantarillado, presencia de 14 despulpadoras de café, fragmentación de hábitat, la deforestación, erosión de los suelos e introducción de nuevas especies. Se ofrece un breve diagnóstico de la biodiversidad y tipos de ecosistemas presentes (manglares, pastizales marinos, playas y bahías). La fauna terrestre constituye un grupo muy diverso, dentro de esta resulta notoria la presencia de las aves las cuales... |
| Tipo: Preprint |
Palavras-chave: Biodiversity; Ecosystems; Ecosystems; Biodiversity; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_33949. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3635 |
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| Mancera-P., J.E.. |
| Un estudio ecológico de la salina marina Pozos Colorados se llevó a cabo entre enero y agosto de 1987. Si bien las dos estaciones de muestreo presentaron amplias diferencias entre si; en general la dinámica del ecosistema dependió aparentemente de la salinidad, la cual varió entre 75 y 341 °/oo; su incremento y la disminución del nivel de agua, al parecer generaron aumento de la temperatura y disminución del oxígeno disuelto, con rangos de 26,3 y 41 °C para la primera y O y 5,4 mg/l para el segundo. Aunque en promedio el pH fue neutro (7,5), este sistema reductor, caracterizado además por abundante materia orgánica, generó en ocasiones una ligera acidez (6,7). La producción primaria neta fue negativa en la mayoría de los casos, como resultado de una... |
| Tipo: Journal Contribution |
Palavras-chave: Salinity effects; Ecosystems; Temperature effects; Primary production; Population structure; Ecology; Ecosystems; Primary production; Population structure; Ecology; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_2467. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/3887 |
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| Portier, R; Meyers, S. |
| The environmental effect and fate of several agricultural and industrial source toxicants were evaluated in controlled laboratory microcosm systems in the presence of the aminopolysaccharide polymer, chitin. Toxicants examined included methyl parathion, phenol, pentachlorophenol, 2,4 dichlorophenol, 1,2 dichloroethane and Kepone. Microcosm operating parameters, including pH/Eh, salinity, temperature, flow rate and sediment/water interface conditions, were based on comparable in situ measurements. Fate analysis predictions were based on mineralization of the parent toxicant compound as measured by chromatographic analysis or super(14)CO sub(2) expiration. Chitin, amended to continuous flow microcosms, promoted either cometabolic or cooxidative... |
| Tipo: Text |
Palavras-chave: Controlled conditions; Chemical pollutants; Industrial wastes; Pesticides; Metabolism; Food webs; Biodegradation; Ecosystems; Microorganisms; Environmental effects; Brackishwater pollution; Estuaries; Toxicants; Chitin. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1011.pdf |
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| Food and Agriculture Organization of the United Nations (FAO),World Conservation Monitoring Centre (WCMC),Center for International Earth Science Information Network (CIESIN),World Resources Institute,International Food Policy Research Institute,Global Maritime Boundaries Database (GMBD),The International Society for Mangrove Ecosystems (ISME), |
| Tipo: Journal Contribution |
Palavras-chave: Country profile; Angola; Ecosystem; Ecosystems. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/570 |
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| Food and Agriculture Organization of the United Nations (FAO),Center for International Earth Science Information Network (CIESIN), World Resources Institute, International Food Policy Research Institute, Global Maritime Boundaries Database (GMBD),World Conservation Monitoring Centre(WCMC),The International Society for Mangrove Ecosystems (ISME) |
| Tipo: Journal Contribution |
Palavras-chave: Ecosystems. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/576 |
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| Food and Agriculture Organization of the United Nations (FAO),Center for International Earth Science Information Network (CIESIN), World Resources Institute, International Food Policy Research Institute, Global Maritime Boundaries Database (GMBD),World Conservation Monitoring Centre(WCMC),The International Society for Mangrove Ecosystems (ISME) |
| Tipo: Report |
Palavras-chave: Ecosystems. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/612 |
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| Food and Agriculture Organization of the United Nations (FAO),Center for International Earth Science Information Network (CIESIN), World Resources Institute, International Food Policy Research Institute, Global Maritime Boundaries Database (GMBD),World Conservation Monitoring Centre(WCMC),The International Society for Mangrove Ecosystems (ISME) |
| Tipo: Journal Contribution |
Palavras-chave: Ecosystems. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/573 |
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| Food and Agriculture Organization of the United Nations (FAO),Center for International Earth Science Information Network (CIESIN), World Resources Institute, International Food Policy Research Institute, Global Maritime Boundaries Database (GMBD),World Conservation Monitoring Centre(WCMC),The International Society for Mangrove Ecosystems (ISME) |
| Tipo: Journal Contribution |
Palavras-chave: Ecosystems. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/572 |
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| Food and Agriculture Organization of the United Nations (FAO),Center for International Earth Science Information Network (CIESIN), World Resources Institute, International Food Policy Research Institute, Global Maritime Boundaries Database (GMBD),World Conservation Monitoring Centre(WCMC),The International Society for Mangrove Ecosystems (ISME) |
| Tipo: Journal Contribution |
Palavras-chave: Ecosystems. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/574 |
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| Food and Agriculture Organization of the United Nations (FAO),Center for International Earth Science Information Network (CIESIN), World Resources Institute, International Food Policy Research Institute, Global Maritime Boundaries Database (GMBD),World Conservation Monitoring Centre(WCMC),The International Society for Mangrove Ecosystems (ISME) |
| Tipo: Report |
Palavras-chave: Ecosystems. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/583 |
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| Registros recuperados: 145 | |
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