Cooperative cichlids boost their own reproductive success

Subordinate individuals living within a group of vertebrates sometimes assist a more dominant pair by helping to raise the dominant pair's offspring and this has been shown to occur among subordinate female cichlids. Reporting in the online, open-access, peer-reviewed journal PLoS ONE, Dik Heg and colleagues at the University of Bern, Switzerland, and the Ohio State University, suggest that rather than engaging in an act of reciprocal altruism, these subordinate females actually benefit from the care-giving they offer as the more helpful subordinates are more likely to reproduce...

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