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Sperm competition in the European starling (Sturnus vulgaris): An experimental study of mate switching

Publiceringsår: 1996
Språk: Engelska
Sidor: 797-801
Publikation/Tidskrift/Serie: Proceedings of the Royal Society of London Series B-Biological Sciences
Volym: 263
Nummer: 1371
Dokumenttyp: Artikel
Förlag: Royal Society Publishing

Sammanfattning

In apparently monogamous or polygynous birds, sperm from several males may compete to fertilize the eggs laid by one female. In this study we evaluate sperm competition in the European starling (Sturnus vulgaris) by means of a mate-switching experiment. Already-mated males were removed between 1-7 d before their mates started egg-laying, resulting in the female remating with a new male. The original males' parentage in the subsequent clutches was evaluated using DNA-fingerprinting. The original males fathered only two out of 46 eggs of those which were not likely to have been fertilized already when the males were removed. The low success of the original males can be attributed to a high within-pair copulation frequency during the assumed fertile period before laying and throughout the laying period, resulting in replacement males fathering most offspring. Thus the success of extra-pair copulations more than 2 d before egg-laying is probably very low. The results are discussed in relation to contrasting results from other mate-switching studies.

Disputation

Nyckelord

  • Biology and Life Sciences
  • frequency
  • extra-pair paternity
  • intraspecific brood parasitism
  • female control
  • dna
  • zebra finch
  • birds
  • copulation
  • cuckoldry

Övrigt

Published
Yes
  • Molecular Ecology and Evolution Lab
  • ISSN: 0962-8452

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