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Effets de l'exploitation par la pêche sur la dynamique de diversité des peuplements de poissons démersaux : analyse comparée du rôle des interactions entre espèces dans le golfe de Gascogne et dans le golfe du Lion ArchiMer
Blanchard, Fabian.
This work deals with the fishing effects on the diversity dynamics of demersal fish communities, focusing on the biotic interactions. Multispecies indices are used in order to characterize the demersal fish community dynamics of the Bay of Biscay and of the Gulf of Lions. These are the diversity indices, the temporal variability of the total biomass and of the slope of the number size spectra and the slope of the species-area curves (spatial segregation). The yearly bottom trawl surveys EVHOE, CHALIST and MEDITS, carried out in these two areas since 1983 by IFREMER for the stocks assessment provide the data. The differences between areas are related to a fishing index (mean value of the annual landings of demersal fish per surface area). Other areas are...
Tipo: Text Palavras-chave: Gulf of Lions; Bay of Biscay; Medits; Chalist; Evhoe; Fishing effect; Diversity; Demersal fish; Golfe du Lion; Golge de Gascogne; Medits; Chalist; Evhoe; Descripteurs; Diversité des peuplements; Poissons démersaux.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/these-6670.pdf
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