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Feeding strategy of Downs herring larvae (Clupea harengus L.) in the English Channel and North Sea ArchiMer
Denis, Jeremy; Vallet, Carole; Courcot, Lucie; Lefebvre, Valerie; Caboche, Josselin; Antajan, Elvire; Marchal, Paul; Loots, Christophe.
This study aims to characterize the larval feeding strategy of the Downs sub-population of North Sea herring (Clupea harengus L.). Diet composition, vacuity rate and prey selectivity of larvae from 8 to 15 mm collected during the International Bottom Trawl Survey (IBTS) - MIK sampling from 2008 to 2013 were assessed by direct observation of their gut contents using Scanning Electron Microscopy (SEM). The high contribution of protists and small zooplanktonic prey observed in the gut contents proved the relevance of SEM to study the diet of first feeding larvae. The relatively low vacuity rate of 45% suggests that food may not be a limiting factor for Downs herring larvae in winter. These larvae appeared to be omnivorous and there was a clear shift in term...
Tipo: Text Palavras-chave: Diet; Feeding strategy; Selectivity index; Scanning electronic microscopy; Downs herring larvae; Gut content.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00345/45606/45226.pdf
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