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Provedor de dados:  ArchiMer
País:  France
Título:  Are growth and density quantitative indicators of essential fish habitat quality? An application to the common sole Solea solea nursery grounds
Autores:  Gilliers, Camille
Le Pape, Olivier
Desaunay, Yves
Morin, Jocelyne
Guerault, Daniel
Amara, Rachid
Data:  2006-08
Ano:  2006
Palavras-chave:  Flatfish juvenile
Essential fish habitat quality
Quantitative bio indicators
Resumo:  Bio-indicators were measured on juvenile fish to assess the quality of eight coastal and estuarine nursery grounds in the Eastern English Channel and in the Bay of Biscay during 3 years. Growth (size and otolith daily increment width), body condition (morphometric index) and abundance of juvenile common soles were analysed together with xenobiotic concentrations (heavy metals and organic contaminants). Condition indices displayed important variations and did not allow relevant estimation of environmental quality. On the contrary, growth and density indicators showed good steadiness above years but varied among sites. In spite of difficulties of interpreting these indicators on such a meso-scale approach, analyses highlighted the estuaries of Seine and Gironde. In these nursery areas, the levels of contamination were especially high, and the combination of fish growth performances and density was significantly lower than in other sites. The combination of these variables appears to provide reliable indicators of habitat quality and anthropogenic pressure on nursery grounds, especially highlighting contaminated areas. Such indicators may thus contribute to improve assessment of environmental quality of essential fish habitats with the aim of a sustainable management of fisheries resources. A study at a different scale, from this meso-scale nursery approach with more precise analyses, on local habitats, will nevertheless be necessary to optimize the relevance of these indicators for the assessment of essential fish habitat quality. (c) 2006 Elsevier Ltd. All rights reserved.
Tipo:  Text
Idioma:  Inglês

Editor:  Elsevier
Formato:  application/pdf
Fonte:  Estuarine, Coastal and Shelf Science (0272-7714) (Elsevier), 2006-08 , Vol. 69 , N. 1-2 , P. 96-106
Direitos:  2006 Elsevier Ltd All rights reserved

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