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Feeding, growth and nutritional status of restocked salmon parr along the longitudinal gradient of a large European river: the Allier
Author(s) -
Descroix A.,
Desvilettes C.,
Martin P.,
Anneville O.,
Bec A.,
Bourdier G.
Publication year - 2009
Publication title -
ecology of freshwater fish
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 55
eISSN - 1600-0633
pISSN - 0906-6691
DOI - 10.1111/j.1600-0633.2008.00345.x
Subject(s) - riffle , grayling , context (archaeology) , competition (biology) , habitat , fishery , temperate climate , upstream and downstream (dna) , upstream (networking) , environmental science , biology , ecology , geography , fish <actinopterygii> , paleontology , computer network , computer science
Abstract – The feeding, growth and nutritional status of salmon parr (0+) released at fry stage in different riffles were studied in a large temperate river (Allier, France) throughout the active feeding period. Significant differences were observed along the upstream–downstream gradient. Parr growth performance and energy storage were higher in downstream riffles and low in the most upstream one. These longitudinal growth variations are discussed in the context of diet and food availability differences, habitat variables and intra‐ and inter‐species competition. The most favourable site for optimum growth and nutritional status appeared to be the intermediary riffle located in the grayling zone.