Genetic monogamy in the absence of paternity guards: the Capricorn silvereye, Zosterops lateralis chlorocephalus, on Heron Island

Robertson, B. C., Degnan, S. M., Kikkawa, J. and Moritz, C. C. (2001) Genetic monogamy in the absence of paternity guards: the Capricorn silvereye, Zosterops lateralis chlorocephalus, on Heron Island. Behavioural Ecology, 12 6: 666-673. doi:10.1093/beheco/12.6.666


Author Robertson, B. C.
Degnan, S. M.
Kikkawa, J.
Moritz, C. C.
Title Genetic monogamy in the absence of paternity guards: the Capricorn silvereye, Zosterops lateralis chlorocephalus, on Heron Island
Journal name Behavioural Ecology   Check publisher's open access policy
ISSN 1045-2249
Publication date 2001-01-01
Sub-type Article (original research)
DOI 10.1093/beheco/12.6.666
Volume 12
Issue 6
Start page 666
End page 673
Total pages 8
Editor A. Bourke
I. Cuthill et al.
Place of publication Cary, NC, USA
Publisher Oxford University Press
Language eng
Subject C1
270706 Life Histories (incl. Population Ecology)
779903 Living resources (flora and fauna)
Abstract We investigated the genetic mating system of a socially monogamous passerine bird, the Capricorn silvereye Zosterops lateralis chlorocephalus, on an island of the Great Barrier Reef. There were no cases of extrapair paternity (EPP) among 122 offspring from 53 broods detectable by minisatellite or microsatellite DNA fingerprinting. Behavioral observations of paired birds showed that this was not a consequence of efficacious paternity guards and that females did not engage in extrapair copulation (EPC). Frequency of intrapair copulations was also low, with only 14 cases observed during 199 hours of observations of the 11 focal pairs in the fertile periods of females, and this was consistent with anatomical features of the cloacal protuberance in males. In this population, young birds form life-time pair bonds soon after gaining independence but females are obviously not attempting EPC possibly to redress this early mate choice. This is despite the fact that they breed in high density with a synchronous start and asynchronous spread of laying in a protracted season and males do not positively exhibit mate guarding behavior when females are fertile. Our results support high fidelity of socially monogamous birds on islands and are consistent with the hypothesis that sexual selection is reduced where genetic variation in fitness is limited.
Keyword Behavioral Sciences
Ecology
Zoology
Dna Fingerprinting
Island Birds
Monogamy
Parentage
Paternity Guards
White-eyes
Extra-pair Paternity
Mating System
Breeding Synchrony
Minisatellite Dna
Parental Care
Birds
Population
Behavior
Males
Copulation
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Created: Wed, 15 Aug 2007, 02:49:24 EST