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Ontogenetic and spatial variation in the diet of hake (Merluccius merluccius) in the Bay of Biscay and the Celtic Sea ArchiMer
Mahe, Kelig; Amara, R; Bryckaert, T; Kacher, M; Brylinski, J.
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 > 23 cm. A change in fish prey was also size-dependent, because smaller hake (< 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...
Tipo: Text Palavras-chave: Spatial variations; Prey selectivity; Northeast Atlantic; European hake; Diet; Cannibalism.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3849.pdf
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Prey selectivity of the octocoral Carijoa riisei at Pernambuco, Brazil Anais da ABC (AABC)
Gomes,Paula B.; Lira,Ana K.F.; Naud,Jean-Philippe; Santos,Andre M.; Pérez,Carlos D..
This study was designed to evaluate prey selection (type and size) by the octocoral Carijoa riisei at Porto de Galinhas beach, Northeast Brazil, relating prey availability in plankton with the content inside polyps. Diatoms and cyanophytes were the predominant items found in both polyp gastric cavity and plankton. A correlation between prey abundance in the plankton and in the gastric cavity of C. riisei polyps was observed. Mastogloia sp. showed the highest positive electivity index (0.99). Benthonic items were found, with 0.51% of total consumed preys. The size amplitude of prey items in the plankton was similar to those found inside the polyps, although the mean prey size in the polyps (112.7 µm) was significantly lower than the value found in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alcyonacea; Natural feeding; Prey selectivity; Prey availability; Trophic ecology.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100016
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