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Rearing conditions influence refuge use among over‐wintering Atlantic salmon juveniles
Author(s) -
Griffiths S. W.,
Armstrong J. D.
Publication year - 2002
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2002.tb00286.x
Subject(s) - salmo , biology , hatchery , fishery , population , fish <actinopterygii> , salmonidae , population density , ecology , demography , sociology
At low population densities, both hatchery‐ and wild‐reared Atlantic salmon Salmo salar , which were progeny of a common genetic stock, occupied sub‐gravel shelters alone. However, at high population densities, hatchery‐reared fish occurred within shelters in significantly higher numbers than wild‐reared fish. There was a significant effect of time after introduction to the experimental arenas on the proportion of hatchery‐reared fish sheltering. These results show that rearing environment influences the behaviour of Atlantic salmon parr during winter and may also affect the carrying capacity of their environment.