Responses of male white ibises to their mate's extra-pair copulations

  title={Responses of male white ibises to their mate's extra-pair copulations},
  author={Peter C. Frederick},
  journal={Behavioral Ecology and Sociobiology},
  • P. Frederick
  • Published 1 October 1987
  • Biology
  • Behavioral Ecology and Sociobiology
SummaryI intensively observed the mating behavior of 134 pairs of white ibises for over 15 000 pair hours to examine the responses of males to extrapair copulations (EPC) involving their mates. Females often cooperated completely in apparently fertile EPCs. Male mate-guarding was vigorous and effective. Males did not respond to apparent sperm competition with forced-pair copulation, physical punishment, or abandonment of their mates. I found no negative correlation between degree of female… 

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