Does relatedness influence migratory timing and behaviour in Atlantic salmon smolts?

Fernandes, Wendy P.A.; Ibbotson, Anton T.; Griffiths, Siân W.; Maxwell, David L.; Davison, Phillip I.; Riley, William D.. 2015 Does relatedness influence migratory timing and behaviour in Atlantic salmon smolts? Animal Behaviour, 106. 191-199.

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Aggregating and moving with relatives may enable animals to increase opportunities for kin selection to occur. To gain group-living benefits, animals must coordinate their behaviour. Atlantic salmon, Salmo salar, demonstrate both territoriality and schooling: the two key social behaviours performed by fish. In this investigation we compared the migratory timing and behaviour of six distinct full-sibling groups of tagged S. salar smolts with a large control sample from the same wild population. The results clearly demonstrate that the incidence of schooling and diel migratory timing is not significantly influenced by relatedness, and this adds further support to the hypothesis that S. salar smolt migration is primarily an adaptive response to environmental conditions, rather than a behaviour based solely on genetics or kin-biased behaviour. Used in conjunction with the results of two previous investigations, this is the first study to illustrate that kin discrimination among full-sibling groups of parr does not lead to kin-biased schooling in smolts. Thus, even within the same full-sibling groups, the extent of kin-biased behaviour in fish can both differ within a life history stage under varying ecological conditions and shift from one life history stage to the next.

Item Type: Publication - Article
Digital Object Identifier (DOI):
UKCEH and CEH Sections/Science Areas: Unaffiliated
ISSN: 0003-3472
Additional Information. Not used in RCUK Gateway to Research.: Open Access paper - full text available via Official URL link
Additional Keywords: anadromous, freshwater phase, kin recognition, kin selection, salmonid, school, shoal
NORA Subject Terms: Ecology and Environment
Date made live: 05 Aug 2015 13:51 +0 (UTC)

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