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Impacts de l’émergence d’un top-prédateur dans un ecosystème exploité : le merlu et le lieu noir de mer du Nord. Quelles interactions ? Quelles conséquences ? ArchiMer
Cormon, Xochitl.
North Sea saithe (Pollachius virens) has high economic value for European fisheries. In recent years, North Sea saithe abundance has decreased, while abundance of hake (Merluccius merluccius), which was rarely fished in the North Sea, has increased dramatically in the area. This work investigates the nature of the ecological interactions between saithe and hake in the North Sea, in order to understand if recent hake emergence in this area could explain, at least partially, the recent decline of the saithe stock. The results obtained during this research suggested competitive interactions between saithe and hake predators in the area. In addition, this investigation revealed potential negative effects of hake on the resident saithe stock. Therefore, hake...
Tipo: Text Palavras-chave: Compétition; Lieu noir; Merlu; Simple réseau trophique; Émergence d’un prédateur; Mer du nord; Exploitative competition; Saithe; Hake; Simple foodweb; Up-coming predator; North sea.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00345/45638/45268.pdf
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