NDLI: Carry-over effects of male extra-pair copulation opportunity on biparental effort in zebra finches

Content Provider	Springer Nature Link
Author	Hill, Davina L. Lindström, Jan Nager, Ruedi G.
Copyright Year	2011
Abstract	Whether parental effort can be negotiated between partners over ecological time and adjusted across different contexts is not well understood. We manipulated male extra-pair copulation (EPC) opportunity in captive zebra finches, Taeniopygia guttata, to test whether males adjust incubation effort to the mating context and to examine how females respond to their partner’s effort. Birds without previous breeding experience were paired randomly and bred with the same partner twice. In the first breeding attempt, half the males received EPC opportunities with ‘extra-pair females’ during incubation, while the other half did not. Males that received EPC opportunities in the first breeding attempt did not in the second breeding attempt and vice versa. We recorded incubation effort on days when EPC opportunities were not presented. In their first breeding attempt, males with EPC opportunities incubated less than those without. Females compensated fully for the deficit in male care so that a pair’s combined incubation effort was unchanged. In the second attempt, when a male’s opportunity for EPCs was switched, individuals showed the same level of incubation effort that they had previously, irrespective of the current availability of extra-pair females. This suggests that division of effort was negotiated in the first breeding attempt and maintained without significant adjustments in the second attempt. The effects of male EPC opportunity in the first breeding attempt on subsequent incubation effort suggests that individual parental decisions can be shaped by previous experience and this may partly explain conflicting results in studies where individuals’ histories were not known.
Starting Page	2049
Ending Page	2059
Page Count	11
File Format	PDF
ISSN	03405443
Journal	Behavioral Ecology and Sociobiology
Volume Number	65
Issue Number	11
e-ISSN	14320762
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-06-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Clutch size Compensation EPC Incubation Sealed bid Taeniopygia guttata Negotiation Zoology Evolutionary Biology Behavioural Sciences
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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