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Eye colour in juvenile Atlantic salmon: effects of social status, aggression and foraging success
Article first published online: 1 APR 2005
DOI: 10.1111/j.1095-8649.2002.tb00899.x
1095-8649/asset/cover.gif?v=1&s=42cfad4aa6c49bffb232ea6bcf4a73b74b630a3f "Journal of Fish Biology")
Additional Information
How to Cite
Suter, H. C. and Huntingford, F. A. (2002), Eye colour in juvenile Atlantic salmon: effects of social status, aggression and foraging success. Journal of Fish Biology, 61: 606–614. doi: 10.1111/j.1095-8649.2002.tb00899.x
Publication History
- Issue published online: 1 APR 2005
- Article first published online: 1 APR 2005
- Received 10 April 2002, Accepted 30 July 2002
- Abstract
- References
- Cited By
Keywords:
- salmon;
- colour;
- signalling;
- foraging;
- dominance
Status-based differences in sclera colour in small groups of juvenile Atlantic salmon Salmo salar, held in a semi-natural environment over a 20 day period, became obvious 3 days after the start of the study and persisted for the 20 days. Dominant fish had pale sclera, and this pattern was very stable over the experimental period. In contrast, the sclera colour of subordinate fish (ranks 2–5) fluctuated from day to day. Median sclera colour offish ranked 4–5 darkened on days they received more aggression, and sclera of rank 2 fish were lighter on days on which they initiated more attacks. Changes in sclera colour of fish ranked 2–4 were more frequent during feeding periods than non-feeding periods. This study confirms that the relationship between eye colour and status described in tanks is also seen in more natural environments, and also that colour change in juvenile salmonids is a complex response to local events.