Data/hora: 12/06/2024 15:01:33

Provedor de dados: 	5	
País: 	France	
Título: 	Ontogenetic and spatial variation in the diet of hake (Merluccius merluccius) in the Bay of Biscay and the Celtic Sea	
Autores: 	Mahe, Kelig; Amara, R; Bryckaert, T; Kacher, M; Brylinski, J.	
Data: 	2007-09	
Ano: 	2007	
Palavras-chave: 	Spatial variations; Prey selectivity; Northeast Atlantic; European hake; Diet; Cannibalism.	
Resumo: 	Analysis of the diet of trawl-caught hake (Merluccius merluccius) from three locations in the Bay of Biscay and the Celtic Sea in autumn 2001 showed that small hake fed almost exclusively on crustaceans (mainly euphausiids), but that there was a significant shift towards a fully piscivorous diet in hake &gt; 23 cm. A change in fish prey was also size-dependent, because smaller hake (&lt; 30 cm) preyed on small pelagic fish (3-12 cm), such as horse mackerel, anchovy, and pilchard, and larger hake on larger demersal prey (12-23 cm), such as blue whiting. There was a significant positive relationship between hake and fish prey length. In terms of fish prey selectivity, hake exhibited particular preference for small pelagic prey (anchovy, pilchard, and argentine) and for other hake. The diet did not generally reflect fish prey availability. Although horse mackerel and blue whiting were the two most abundant fish prey species in the environment, they were not positively selected by hake. Cannibalism accounted for a non-negligible part of the diet and was observed mainly in large hake (&gt; 30 cm). For all sizes analysed, conspecifics constituted 19.2%W of the diet and the frequency of occurrence of hake in the stomachs was 10.53%. Most hake prey were 0-group juveniles (&lt; 20 cm). Hake cannibalism appeared to be influenced mainly by the abundance of juveniles and the overlap between distribution patterns of juveniles and adults.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/2007/publication-3849.pdf

DOI:10.1093/icesjms/fsm100	
Editor: 	Oxford university press	
Relação: 	http://archimer.ifremer.fr/doc/00000/3849/	
Formato: 	application/pdf	
Fonte: 	ICES Journal of Marine Science (1054-3139) (Oxford university press), 2007-09 , Vol. 64 , N. 6 , P. 1210-1219	
Fonte: 	2007 International Council for the Exploration of the Sea. Oxford Journals