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| Registros recuperados: 108 | |
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| L'intérêt du Gouvernement pour la gestion de l'environnement s'est trouvé rehaussé lors du sommet de Rio en 1992. Le Cameroun engagé dans une perspective de développement durable a garanti une gestion intégrée des écosystèmes fragiles. Cet engagement s’étend à la zone côtière qui fut identifiée parmi plusieurs autres écosystèmes comme zone écologique vulnérable nécessitant une attention particulière. Pour faire face à cette situation, les efforts nationaux de gestion durable de cette zone ont bénéficié d'un appui et d'une collaboration aux niveaux régional et international. Ces efforts sont fondés sur des interventions sectorielles caractérisées par des réglementations partielles et inadéquates. Le projet Grand Ecosystème Marin du Courant de Guinée... |
| Tipo: Report |
Palavras-chave: Coasts; Marine environment; Biological resources. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/5227 |
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| Scenna, L.B.. |
| Se estudia la biología y ecología reproductiva de las ocho especies de Bathyraja presentes en la plataforma continental argentina (Atlántico S.O.), a través del análisis del tamaño corporal, las cápsulas de huevos, el desarrollo de los embriones, la talla de madurez sexual, las variaciones en las condiciones reproductivas, las áreas de puesta y la segregación espacial de los individuos. El material examinado provino de campañas de investigación llevadas a cabo por el Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) entre 34º40'S y 54º30'S, desde septiembre 2003 hasta octubre 2007. La información presentada en el trabajo demuestra que las especies del Género Bathyraja en la plataforma argentina maduran a una talla alta en relación a la Lt... |
| Tipo: Theses and Dissertations |
Palavras-chave: Reproduction; Biogeography; Morphometry; Fish eggs; Sexual maturity; Spawning grounds; Marine fish; Rajidae; Marine environment. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4776 |
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| Hernández, Y.; Laguna, A.; Fernández, M.D.; Valdés, O.; Regalado, E.L.. |
| Ha sido demostrado, por otros autores, que el alga Ulva fasciata Delile posee una actividad antioxidante promisoria y en el presente trabajo evaluamos si la actividad antioxidante de muestras de esta alga puede ser influenciada por la adsorción de metales, pesados y otros por parte del alga. U. fasciata fue colectada en tres zonas de las costas de la Ciudad de la Habana que presentan diferentes niveles de eutrofización: 1) la desembocadura del Río Quibú, un río que atraviesa una importante zona industrial de la capital cubana y en la cual la concentración de metales acumulados por el alga fue mayor; 2) la zona del Malecón habanero, que recibe la contaminación de la bahía de la Habana y del Río Almendares pero no de forma directa, donde presentó valores... |
| Tipo: Journal Contribution |
Palavras-chave: Algae; Marine environment; Heavy metals; Marine environment; Heavy metals; Algae; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_258. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/2919 |
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| 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 |
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| This document provides a regional overview on land-based sources and activities affecting the marine, coastal and associated freshwater environment in the West and Central African region. It addresses natural conditions and processes, anthropogenic impacts and its socio-economic implications, including losses of cultural heritage sites. This overview also contains information on emerging and forseeable problems in the region, proposing priorities for action including regional and international activities for cooperation. This document encompasses the following nations: Angola, Benin, Chad, Congo (Democratic Republic), Côte d’Ivoire, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mauritania, Nigeria, São Tomé and Principe, Senegal and Togo. |
| Tipo: Report |
Palavras-chave: Marine environment; Coastal environment; Freshwater environment. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/312 |
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| Hansen, J.E.. |
| The aim of this paper was to accurately estimate population parameters of northern (“bonaerensis”, latitude < 41° S) and southern (“patagonic”, latitude 41° S) Argentine anchovy stocks and to describe some aspects of their behaviour. The research surveys allowed to obtain data on length, total weight, sex, maturity and age of 27,853 specimens of the northern and 12,787 of the southern stocks. Besides, 20,717 age determinations stemmed from commercial landing samplings of the northern stock were established. Sex proportion in the northern population was 0.50 : 0.50; the southern showed a slight predominance of males (0.52 : 0.48). Data derived from cruises and commercial landings showed statistical differences in the growth ratio of the northern stock... |
| Tipo: Journal Contribution |
Palavras-chave: Pelagic fisheries; Stocks; Population characteristics; Growth; Natural mortality; Sexual maturity; Engraulis anchoita; Marine environment. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4884 |
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| Coastal & Environmental Services. |
| The proposed Coega Port will be situated near the southern extreme of the Industrial Development Zone (IDZ) at the mouth of the Coega River to the east of Port Elizabeth. This specialist report deals with the issues and impacts associated with land disposal of excavated material, marine dredging and disposal, and outlines the monitoring guidelines for the dredging and disposal operation. Chapter 1 describes the port layout, limits and its proposed functions, which include acting as an inter-modal transshipment point for bulk cargo and containers for industries in the IDZ and the hinterland. A brief summary of the guidelines for the management of dredged material is then presented. This section is largely based on the PIANC guidelines, but incorporates... |
| Tipo: Report |
Palavras-chave: Marine environment; Ports; Harbour installations. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/306 |
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| Ruarte, C.O; Rico, M.R.. |
| Stripped weakfish is one of the ensemble of species known as “variado costero” most frequently landed. Considering that fact, determination of abundance indices is particularly relevant to apply assessment models and make recommendations to allow for a proper fishery management. The aim of this study was to obtain those indices of the species derived from research cruises carried out in the Argentine-Uruguayan Common Fishing Zone AUCFZ area (34°S-39°S) in the 1993-2006 period. In order to improve the traditional estimate accuracy modeling was used. To formulate the general linear models year, stratum, length, bottom salinity, depth factors and population data such as mean size and juveniles percentage were used. The percentages of variance explained in the... |
| Tipo: Journal Contribution |
Palavras-chave: Abundance; Mathematical models; Stock assessment; Coastal fisheries; Cynoscion guatucupa; Marine environment. |
| Ano: 2014 |
URL: http://hdl.handle.net/1834/5821 |
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| El-Sarraf, W.M.. |
| Results of the investigation carried out in Lakes Mariut and Edku revealed that the trace metals concentrations in ceratophyllum demersum is relatively higher than that in Potamogeton pectinatus. The protein and trace metals in macrophytes collected from unpolluted areas is lower thjan that form polluted ones. Eichhornia crassipes can have a restricted role for the treatment of lake water. In Lake Edku, the results of chemical composition of sediments agree with the previous studies. The trace metal content of C. demersum was higher than that of P. pectinatus. The higher organic carbon level was recorded in stems of submerged plants and in leaves of floating ones. On the other hand, the high concentration of trace metal was observed in leaves of submerged... |
| Tipo: Journal Contribution |
Palavras-chave: Accumulation; Marine environment; Marine environment; Http://aims.fao.org/aos/agrovoc/c_4610. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/1244 |
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| Perrine Anderson. |
| Description du secteur de la pêche Avec la Mauritanie, le Sénégal est de loin le plus grand producteur de produits de pêche de la sous région. Avec 718 km de cote et un territoire maritime de 198km2, 15 745 km2 de superficie fluviale, 2 estuaires, des mangroves et un lac de 350km2, le Sénégal possède tous les atouts des plus grands producteurs de pêche. Le potentiel annuel de captures s’élève à 500 000 tonnes. Le secteur a subi une croissance spectaculaire ces trente dernières années : les débarquements sont passés 50 000 tonnes en 1965 à plus de 450 000 en 1997. Le secteur se compose principalement de deux sous-secteurs : la pêche industrielle et la pêche traditionnelle ou artisanale. Cette dernière, vielle de plusieurs siècles a su s’adapter et se... |
| Tipo: Report |
Palavras-chave: Fisheries; Marine environment; Socioeconomic aspects; Capture fisheries; Landing statistics; Fishing gear; Women; Fishermen; Conventions; Fishery regulations. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/4728 |
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| Registros recuperados: 108 | |
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