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	Provedor de dados ArchiMer (2) Autor Ecoutin, J. M. (1) Handegard, Nils Olav (1) Kantoussan, J. (1) Lae, R. (1) Thiaw, O. T. (1) Tito De Morais, L. (1) Trenkel, Verena (1) Weber, Thomas C. (1) Mais... Palavra-chave Ecosystem monitoring (2) Acoustics (1) Biological indicators (1) Broadband (1) Casamance Estuary (1) Echosounder (1) Ecosystem approach to management (1) Fishery statistics (1) Inverse hypersaline estuary (1) Multi-frequency (1) Passive and active acoustics (1) Pelagic ecosystem (1) Senegal (1) Sonar (1) Taxonomic diversity (1) Mais... Tipo do documento Text (2) Ano 2018 (1) 2016 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última A multimetric-index approach using fisheries data to assess fish assemblage structure in relation to salinity gradient in a tropical West African estuary ArchiMer Kantoussan, J.; Ecoutin, J. M.; Lae, R.; Thiaw, O. T.; Tito De Morais, L.. This study examines the effects of increasing salinity on fish assemblage structure in the Casamance Estuary, Senegal. using a series of indices. The study data were derived from commercial fishery surveys conducted between April and July 2005. Analysis of within-trophic-group diversity in the Casamance Estuary shows a significant drop in the diversity of apex predators in the upper. more saline reaches of the estuary. By contrast. primary consumers adapted well to salinity changes and exhibited higher taxonomic diversity in the upper reaches of the estuary than in the lower reaches. The findings also indicate decreases in average sizes of the landed species and the trophic levels among fish catches in the direction of the upper reaches. However, the catch... Tipo: Text Palavras-chave: Biological indicators; Casamance Estuary; Ecosystem monitoring; Fishery statistics; Inverse hypersaline estuary; Senegal; Taxonomic diversity. Ano: 2018 URL: https://archimer.ifremer.fr/doc/00451/56222/57945.pdf Observing the ocean interior in support of integrated management ArchiMer Trenkel, Verena; Handegard, Nils Olav; Weber, Thomas C.. Active- and passive-acoustic methods are widely used tools for observing, monitoring, and understanding marine ecosystems. From 25 to 28 May 2015, 214 scientists from 31 nations gathered for an ICES symposium on Marine Ecosystem Acoustics (SoME Acoustics) to discuss three major themes related to acoustic observations of marine ecosystems: (i) recent developments in acoustic and platform technologies; (ii) acoustic characterisation of aquatic organisms, ecosystem structure, and ecosystem processes; and (iii) contribution of acoustics to integrated ecosystem assessments and management. The development of, and access to new instruments, such as broad bandwidth systems, enables insightful ecological studies and innovative management approaches. Unresolved... Tipo: Text Palavras-chave: Acoustics; Broadband; Multi-frequency; Passive and active acoustics; Ecosystem approach to management; Ecosystem monitoring; Pelagic ecosystem; Echosounder; Sonar. Ano: 2016 URL: http://archimer.ifremer.fr/doc/00347/45820/45921.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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