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Density‐dependent refuge use among over‐wintering wild Atlantic salmon juveniles
Author(s) -
Armstrong J. D.,
Griffiths S. W.
Publication year - 2001
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.1095-8649.2001.tb02309.x
Subject(s) - biology , juvenile , fish <actinopterygii> , streams , fishery , population density , density dependence , juvenile fish , ecology , population , demography , sociology , computer network , computer science
Sheltering behaviour of wild juvenile Atlantic salmon in an indoor stream was found to be density dependent; the proportion of fish sheltering decreased significantly with increasing population density. The mean number of fish occupying refugia was ≤1.5 fish per refuge even at very high densities (potentially 5 fish per shelter). These results suggest that shelter availability has potentially important consequences for the carrying capacity for natural populations of salmon in streams.