Rearing conditions influence refuge use among over-wintering Atlantic salmon juveniles
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-re...
| Published in: | Journal of Fish Biology |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
Wiley
2002
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| Subjects: | |
| Online Access: | https://orca.cardiff.ac.uk/id/eprint/62626/ https://doi.org/10.1006/jfbi.2001.1846 |
| Summary: | 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. |
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