Kinship reinforces cooperative predator inspection in a cichlid fish

Hesse, Saskia; Anaja-Rojas, Jamie M.; Frommen, Joachim Gerhard; Thünken, Timo (2015). Kinship reinforces cooperative predator inspection in a cichlid fish. Journal of Evolutionary Biology, 28(11), pp. 2088-2096. Wiley 10.1111/jeb.12736

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Kin selection theory predicts that cooperation is facilitated between genetic relatives, as by cooperating with kin an individual might increase its inclusive fitness. Although numerous theoretical papers support Hamilton's inclusive fitness theory, experimental evidence is still underrepresented, in particular in noncooperative breeders. Cooperative predator inspection is one of the most intriguing antipredator strategies, as it implies high costs on inspectors. During an inspection event, one or more individuals leave the safety of a group and approach a potential predator to gather information about the current predation risk. We investigated the effect of genetic relatedness on cooperative predator inspection in juveniles of the cichlid fish Pelvicachromis taeniatus, a species in which juveniles live in shoals under natural conditions. We show that relatedness significantly influenced predator inspection behaviour with kin dyads being significantly more cooperative. Thus, our results indicate a higher disposition for cooperative antipredator behaviour among kin as predicted by kin selection theory.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Behavioural Ecology

UniBE Contributor:

Frommen, Joachim Gerhard and Thünken, Timo

Subjects:

500 Science > 590 Animals (Zoology)

ISSN:

1010-061X

Publisher:

Wiley

Language:

English

Submitter:

Karin Schneeberger

Date Deposited:

27 Sep 2016 12:05

Last Modified:

09 Sep 2017 07:41

Publisher DOI:

10.1111/jeb.12736

PubMed ID:

26299423

BORIS DOI:

10.7892/boris.88691

URI:

https://boris.unibe.ch/id/eprint/88691

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