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Implications Of Multiple Mating For Offspring Relatedness And Shoaling Behaviour In Juvenile Guppies

November 06, 2019

In this paper we use guppies to show that differences in the level of relatedness between singly-sired broods (which are always full siblings) and multiply-sired broods (which can comprise either full- or half-siblings) can have important consequences for offspring social behaviour.

We found that full-siblings spent more time shoaling in close proximity than half-siblings, revealing an apparent innate ability of juvenile guppies to discriminate among brood mates according to their level of genetic similarity.

Shoaling, in turn, confers important antipredator, and potentially kin-selected, benefits. Our results therefore also point to a potential cost of polyandry: the reduced social cohesion of brood members with potentially important fitness implications

Royal Society journal Biology Letters

Biology Letters publishes short, innovative and cutting-edge research articles and opinion pieces accessible to scientists from across the biological sciences. The journal is characterised by stringent peer-review, rapid publication and broad dissemination of succinct high-quality research communications.

Biology Letters