Occurrence of extra-pair copulation in t
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Scott B. Morrill; Raleigh J. Robertson
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Article
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1990
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Springer
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English
β 649 KB
A new method to mark sperm transfer events between birds, using microspheres inserted into males' cloacae, was employed to assess the frequency of extra-pair copulation (EPC) in a population of tree swallows (Tachycineta bicolor) in Ontario, Canada, during the summer of 1988. We inserted 25 males wi