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	Provedor de dados ArchiMer (4) Autor Brehmer, Patrice (4) Diouf, Malick (4) Fall, Massal (3) Baldé, Bocar Sabaly (2) Ekau, Werner (2) Kantoussan, Justin (2) Ba, Aliou (1) Ba, Kamarel (1) Balde, Bocar Sabaly (1) Chaboud, Christian (1) Deme, Moustapha (1) Döring, Julian (1) Schmidt, Joern (1) Sow, Fambaye N. (1) Sow, Fambaye Ngom (1) Mais... Palavra-chave West Africa (3) Data poor fisheries (2) Small pelagic fish (2) Small scale fisheries (2) Aichi targets (1) Bioeconomic modeling (1) Climate change (1) Clupeid (1) Data-poor fisheries (1) Environmental variability (1) Fecundity (1) Fisheries management (1) Fishery management (1) Fishing capacity (1) MPA (1) Optimal environmental window (1) Reproductive adaptation (1) Sardinella aurita (1) Sardinella maderensis (1) Shared stocks (1) Mais... Tipo do documento Text (4) Ano 2019 (4) País France (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Variability of key biological parameters of round sardinella Sardinella aurita and the effects of environmental changes ArchiMer Balde, Bocar Sabaly; Sow, Fambaye N.; Ba, Kamarel; Ekau, Werner; Brehmer, Patrice; Kantoussan, Justin; Fall, Massal; Diouf, Malick. We examined growth rates and reproductive characteristics of Sardinella aurita off Senegal and other coastal areas over a 20 year period (1995-2014) to determine how they relate to variations in environmental characteristics of coastal waters. Based on fish length-frequency data and a coastal upwelling index, we found that S. aurita recruitment tends to occur during the periods of most intensive upwelling (March-April off Senegal). Peak reproduction corresponds to periods of low sea-surface temperature (in February or March). The sex ratio was remarkably consistent during the 30 year study period and so was not affected by environmental changes. We hypothesise that S. aurita takes advantage of the higher zooplankton productivity that occurs in coastal... Tipo: Text Palavras-chave: Data poor fisheries; Environmental variability; Size structure; Small pelagic; Spawning period; West Africa. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00491/60229/67183.pdf Fish-length based indicators for improved management of the sardinella fisheries in Senegal ArchiMer Baldé, Bocar Sabaly; Fall, Massal; Kantoussan, Justin; Sow, Fambaye Ngom; Diouf, Malick; Brehmer, Patrice. Fisheries management is difficult especially in developing countries where there are little or no data available for stock assessment. Here, a simple model based on the length-based Bayesian biomass (LBB) is applied to length frequencies collected on the two sardinella species (Sardinella maderensis and S. aurita) collected in Senegalese waters (2004 to 2014) to diagnose these stocks and to support the development of fishery management options that may improve the livelihoods of artisanal fishermen. Annual mean length of both species of sardinella showed a large variation during the decadal study period. It is assumed that such variations are due to environmental changes. According to our results, based on the current exploitation rate, both sardinella... Tipo: Text Palavras-chave: Data poor fisheries; Fisheries management; Shared stocks; Small scale fisheries; Small pelagic fish; West Africa. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00512/62318/67184.pdf The potential impact of marine protected areas on the Senegalese sardinella fishery ArchiMer Ba, Aliou; Chaboud, Christian; Schmidt, Joern; Diouf, Malick; Fall, Massal; Deme, Moustapha; Brehmer, Patrice. In the early 2000s, Senegal set up several Marine Protected Areas (MPAs) along its coastal zone with the purpose of biodiversity conservation and to support sustainable management of fisheries. However, the impact of MPAs may vary according to the type of fisheries. In Senegal, the sardinella fishery accounts for 70% of total catches. This fishery is of crucial importance for national food security and employment. Given this importance, it is necessary to evaluate the impact of MPAs, often being considered as a tool for fisheries management. An analytical, dynamic and spatial bio-economic model of sardinella fishery, considering fish and fisher migration, has been developed and scenarios over forty years have been analyzed. The results show that the... Tipo: Text Palavras-chave: Small scale fisheries; MPA; Bioeconomic modeling; Fishing capacity; Fishery management; Sardinella aurita; Sardinella maderensis; Aichi targets; West Africa. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00605/71672/73087.pdf Bonga shad ( Ethmalosa fimbriata ) spawning tactics in an upwelling environment ArchiMer Baldé, Bocar Sabaly; Döring, Julian; Ekau, Werner; Diouf, Malick; Brehmer, Patrice. Successful recruitment in small pelagic fish populations inhabiting upwelling zones is subject to variation in fecundity and is driven by spatial and temporal fluctuations in environmental conditions, that is, mainly sea surface temperature, salinity and food availability. These fluctuations in abiotic factors have stimulated small pelagic fish populations to exhibit specifically adapted spawning tactics. To better understand to what extent a short‐lived exploited fish species such as bonga shad Ethmalosa fimbriata has adapted to an upwelling environment, we have investigated the interrelationship between upwelling intensity as a proxy for productivity and population fecundity by means of a virtual population analysis. We found that females of intermediate... Tipo: Text Palavras-chave: Climate change; Clupeid; Data-poor fisheries; Fecundity; Optimal environmental window; Reproductive adaptation; Small pelagic fish. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00516/62765/67164.pdf Registros recuperados: 4 Primeira ... 1 ... Última

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