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Dunn PO, Afton AD, Gloutney ML, et al. Forced copulation results in few extrapair fertilizations in Ross's and lesser snow geese. Anim Behav. 1999;57(5):1071-1081doi: 10.1006/anbe.1998.1066.
Dunn, P. O., Afton, A. D., Gloutney, M. L., & Alisauskas, R. T. (1999). Forced copulation results in few extrapair fertilizations in Ross's and lesser snow geese. Animal behaviour, 57(5), 1071-1081. https://doi.org/10.1006/anbe.1998.1066
Dunn, et al. "Forced copulation results in few extrapair fertilizations in Ross's and lesser snow geese." Animal behaviour vol. 57,5 (1999): 1071-1081. doi: https://doi.org/10.1006/anbe.1998.1066
Dunn PO, Afton AD, Gloutney ML, Alisauskas RT. Forced copulation results in few extrapair fertilizations in Ross's and lesser snow geese. Anim Behav. 1999 May;57(5):1071-1081. doi: 10.1006/anbe.1998.1066. PMID: 10328793.
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Anim Behav. 1999 May;57(5):1071-1081. doi: 10.1006/anbe.1998.1066.

Forced copulation results in few extrapair fertilizations in Ross's and lesser snow geese.

Animal behaviour

Dunn, Afton, Gloutney, Alisauskas

Affiliations

  1. U.S. Geological Survey, Louisiana Cooperative Fish and Wildlife Research Unit, Louisiana State University

PMID: 10328793 DOI: 10.1006/anbe.1998.1066

Abstract

Extrapair paternity varies from 0 to over 70% of young among various populations of birds. Comparative studies have suggested that this variation is related to nesting density, breeding synchrony and the proportion of extrapair copulations. We used minisatellite DNA fingerprinting to examine levels of extrapair paternity in Ross's geese, Chen rossi, and lesser snow geese, C. caerulescens c. (hereafter snow geese) nesting in the largest known goose colony in the world. These geese have one of the highest known percentages of extrapair copulation (46-56% of all attempted copulations), and all of these appeared to be forced. Among all successful copulations, 33 and 38% were extrapair in Ross's and snow geese, respectively. Despite the high percentage of extrapair copulations, extrapair paternity was low in both Ross's and snow geese (2-5% of young). Extrapair paternity was not related to nest density in either species. However, in snow geese, extrapair paternity was more likely to occur in nests of females that nested asynchronously, either early or late in the season. This is one of a few reported examples of a negative relationship between extrapair paternity and breeding synchrony. Extrapair young also tended to come from eggs laid later in the clutch. Although forced extrapair copulations appear to be a relatively inefficient reproductive tactic for males, they may provide a reproductive advantage for some males. Copyright 1999 The Association for the Study of Animal Behaviour.

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