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Relatedness and age reduce aggressive maleinteractions over mating in domestic fowl
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering. Faculty of Life Sciences, University of Manchester, M13 9LP Manchester, UK.
Department of Zoology, Stockholm University, Sweden.
School of Biological Sciences, Clayton Campus, Monash University, Victoria 3800, Australia, and Department of Genetics, Evolution and Environment, University College London.
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-4352-6275
2017 (English)In: Behavioral Ecology, ISSN 1045-2249, E-ISSN 1465-7279, Vol. 28, no 3, 760-766 p.Article in journal (Refereed) Published
Abstract [en]

Altruistic behaviour represents a fundamental challenge in evolutionary biology. It is often best understood through kin selection,

where favourable behaviour is directed towards relatives. Kin selection can take place when males cooperate to enhance the reproductive

success of relatives. Here, we focus on reduced male–male competition over mating as a case of cooperation, by examining

male tolerance of matings by related and unrelated competitors. A suitable model for exploring whether relatedness affects male–male

interactions over mating is the domestic fowl,

Gallus gallus domesticus. In this species, males form social hierarchies and dominant

males commonly interrupt subdominant males’ copulation attempts. We investigated whether dominant male fowl differentially direct

aggressive interactions towards unrelated and related subordinate males during mating attempts. Dominant male fowl were found to

interrupt mating attempts of male relatives less often than those of unrelated males. We further tested whether male age mediates the

magnitude of kin tolerance behaviour. However, we found no support for this as both young and old dominant males were less likely to

interrupt related, compared to unrelated, subdominant males’ copulations during male–male interactions. Our results, consistent with

kin selection, provide a rare experimental demonstration of relatedness relaxing male–male competition over mating.

Place, publisher, year, edition, pages
Oxford University Press, 2017. Vol. 28, no 3, 760-766 p.
Keyword [en]
aggression, chicken, gallus gallus, intra-sexual selection, kin recognition, relatedness
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:liu:diva-138098DOI: 10.1093/beheco/arx024ISI: 000401942800023OAI: oai:DiVA.org:liu-138098DiVA: diva2:1106866
Note

Funding agencies: ERASMUS; Zochonis Enterprise Fund; Discovery Early Career Researcher Award from the Australian Research Council and Marie Curie Actions [DE150101853, 655392]; Linkping University "Future research leader" programme

Available from: 2017-06-08 Created: 2017-06-08 Last updated: 2017-06-14

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