Effect of density on competition between wild and hatchery‐reared Atlantic salmon for shelter in winter
The effect of varying the density of hatchery‐reared Atlantic salmon Salmo salar on the ability of single wild fish to occupy a shelter is assessed. Although there was strong density‐dependence on sheltering overall, the ability of wild Atlantic salmon parr to occupy
a shelter was not affected by the presence of hatchery‐reared fish even when outnumbered by four to one. These findings illustrate a competitive asymmetry for shelter in favour of the wild fish at the densities tested.
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Document Type: Regular Paper
Cardiff School of Biosciences, Cardiff University Main Building, P. O. Box 915, Cardiff, Wales, CF10 3TL, U.K. and
Fisheries Research Services, Freshwater Laboratory, Faskally, Pitlochry, Perthshire, Scotland, PH16 5LB, U.K.
Publication date: 2004-12-01