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Effects of body size on sympatric shelter use in over-wintering juvenile salmonids

Orpwood, James Edward, Griffiths, Sian Wyn and Armstrong, J. D. 2003. Effects of body size on sympatric shelter use in over-wintering juvenile salmonids. Journal of Fish Biology 63 (Supp 1) , pp. 166-173. 10.1111/j.1095-8649.2003.00206.x

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Abstract

The study tests two hypotheses: (1) the degree of shelter dominance in Atlantic salmon Salmo salar and brown trout Salmo trutta increases progressively with increasing size differential between heterospecific fish in a pair and (2) shelter dominance, standardized to size differential, correlates with aggression. The results support the first but not the second hypothesis, suggesting that the fitness consequences of high growth performance during the summer are likely to become evident during winter. At this time of year, when mortality is high among both Atlantic salmon and brown trout, shelter dominance may increase the chances of survival.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: Q Science > Q Science (General)
Uncontrolled Keywords: Competition; Salmo salar; Salmo trutta; sheltering behaviour; size; winter.
Publisher: Wiley
ISSN: 0022-1112
Last Modified: 31 Jan 2020 06:40
URI: http://orca.cf.ac.uk/id/eprint/62621

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