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Research article - Peer-reviewed, 2015

Dominance and stress signalling of carotenoid pigmentation in Arctic charr (Salvelinus alpinus): Lateralization effects?

Backström, Tobias; Heynen, Martina; Brännäs, Eva; Nilsson, Jan; Magnhagen, Carin

Abstract

Social conflicts are usually solved by agonistic interactions where animals use cues to signal dominance or subordinance. Pigmentation change is a common cue used for signalling. In our study, the involvement of carotenoid-based pigmentation in signalling was investigated in juvenile Arctic charr (Salvelinus alpinus). Size-matched pairs were analysed for pigmentation both before and after being tested for competitive ability. We found that dominant individuals had fewer carotenoid-based spots on the right and left sides as well as lower plasma cortisol levels compared to subordinate individuals. Further, the number of spots on both sides was positively associated with plasma cortisol levels. These results indicate that carotenoid-based pigmentation in Arctic charr signals dominance and stress coping style. Further, it also appears as if carotenoid-based pigmentation is lateralized in Arctic charr, and that the right side signals aggression and dominance whereas the left side signals stress responsiveness. (C) 2014 Elsevier Inc. All rights reserved.

Keywords

Aggression; Carotenoid; Dominance; Lateralization; Pigmentation; Stress coping style

Published in

Physiology and Behavior
2015, volume: 138, pages: 52-57

Authors' information

Backström, Tobias
Swedish University of Agricultural Sciences, Department of Wildlife, Fish and Environmental Studies
Heynen, Martina
Swedish University of Agricultural Sciences, Department of Wildlife, Fish and Environmental Studies
Brännäs, Eva
Swedish University of Agricultural Sciences, Department of Wildlife, Fish and Environmental Studies
Nilsson, Jan
Swedish University of Agricultural Sciences, Department of Wildlife, Fish and Environmental Studies
Swedish University of Agricultural Sciences, Department of Wildlife, Fish and Environmental Studies

UKÄ Subject classification

Fish and Aquacultural Science
Ecology

Publication Identifiers

DOI: https://doi.org/10.1016/j.physbeh.2014.10.003

URI (permanent link to this page)

https://res.slu.se/id/publ/62909