Data/hora: 10/06/2024 16:23:55

Provedor de dados: | 5
País: | France
Título: | Fishing effects on diversity, size and community structure of the benthic invertebrate and fish megafauna on the Bay of Biscay coast of France
Autores: | Blanchard, Fabian; Le Loc'H, Francois; Hily, Christian; Boucher, Jean.
Data: | 2004
Ano: | 2004
Palavras-chave: | Benthic communities; Community dynamics; Disturbance; Diversity; Size spectrum.
Resumo: | Within the framework of the 'dynamic equilibrium model', we tested the hypothesis that fishing causes major disturbance to benthic communities on deeper bottoms of the continental shelf. Benthic megafauna on the Bay of Biscay coast of France was sampled on fishing grounds subject to various conditions of exploitation. Samples were taken at around 100 m depth to avoid strong natural disturbances. Species diversity and the largest body mass class of invertebrates were smaller in strongly exploited areas than in moderately exploited ones. Biomass size spectra in strongly exploited areas were characterised by a comparatively large biomass of small invertebrates, hence the K-dominance curve of abundance was either above the biomass curve, or the curves intersected. In moderately exploited areas, the K-dominance biomass curves were above the abundance curves; the dominant species were a commercial species and a benthic species sensitive to the physical effects of the fishing gears. In the heavily exploited areas, the dominant species were opportunistic carnivorous species of minor or no commercial interest. There were no dominant fish species in the most strongly exploited areas, while 2 fish species were found in the moderately exploited areas. No fragile species were found in the most exploited areas, whereas 6 fragile species were found in the moderately exploited ones. It is concluded that the differences between the most strongly exploited and the moderately exploited areas were consistent with the hypothesis.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00000/10896/7578.pdf

DOI:10.3354/meps280249

http://archimer.ifremer.fr/doc/00000/10896/

Editor: | Inter-research
Formato: | application/pdf
Fonte: | Marine Ecology Progress Series (0171-8630) (Inter-research), 2004 , Vol. 280 , P. 249-260

Fonte:

Inter-Research 2004

info:eu-repo/semantics/openAccess

restricted use