Unrelated helpers neither signal contributions nor suffer retribution in chestnut-crowed babblers

Nomano, Fumiaki Y., Browning, Lucy E., Savage, James L., Rollins, Lee A., Griffith, Simon C. and Russell, Andrew F. 2015, Unrelated helpers neither signal contributions nor suffer retribution in chestnut-crowed babblers, Behavioral ecology, vol. 26, no. 4, pp. 986-995.

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Title Unrelated helpers neither signal contributions nor suffer retribution in chestnut-crowed babblers
Author(s) Nomano, Fumiaki Y.
Browning, Lucy E.
Savage, James L.
Rollins, Lee A.ORCID iD for Rollins, Lee A. orcid.org/0000-0002-3279-7005
Griffith, Simon C.
Russell, Andrew F.
Journal name Behavioral ecology
Volume number 26
Issue number 4
Start page 986
End page 995
Total pages 10
Publisher Oxford University Press
Place of publication Oxford, Eng.
Publication date 2015-01-01
ISSN 1045-2249
1465-7279
Keyword(s) Science & Technology
Life Sciences & Biomedicine
Behavioral Sciences
Biology
Ecology
Zoology
Life Sciences & Biomedicine - Other Topics
Environmental Sciences & Ecology
coercion
direct benefits
pay-to-stay
punishment
signaling
COOPERATIVELY BREEDING BIRD
CROWNED BABBLER
POMATOSTOMUS-RUFICEPS
GROUP AUGMENTATION
HELPING-BEHAVIOR
PREDATION RISK
EVOLUTION
COEFFICIENTS
RELATEDNESS
Summary Alloparental care by distant/nonkin that accrue few kin-selected benefits requires direct fitness benefits to evolve. The pay-to-stay hypothesis, under which helpers contribute to alloparental care to avoid being expelled from the group by dominant individuals, offers one such explanation. Here, we investigated 2 key predictions derived from the pay-to-stay hypothesis using the chestnut-crowed babbler, Pomatostomus ruficeps, a cooperatively breeding bird where helping by distant/nonkin is common (18% of nonbreeding helpers). First, we found no indication that distant or nonkin male helpers advertised their contributions toward the primary male breeder. Helpers unrelated to both breeders were unresponsive to provisioning rates of the dominant male, whereas helpers that were related to either the breeding male or to both members of the pair were responsive. In addition, unrelated male helpers did not advertise their contributions to provisioning by disproportionately synchronizing their provisioning events with those of the primary male breeder or by provisioning nestlings immediately after him. Second, no helper, irrespective of its relatedness to the dominant breeders, received aggression when released back into the group following temporary removal for 1-2 days. We therefore find no compelling support for the hypothesis that pay-to-stay mechanisms account for the cooperative behavior of unrelated males in chestnut-crowned babblers.
Language eng
Field of Research 060201 Behavioural Ecology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Oxford University Press
Persistent URL http://hdl.handle.net/10536/DRO/DU:30075761

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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