Extra-pair paternity in monogamous and polygynous Savannah sparrows, Passerculus sandwichensis
Article Abstract:
Fledgling production in a population of monogamous and polygynous males Passerculus sandwichensis or Savannah sparrows were analyzed to determine the role of polygyny on male reproductive performance. Multilocus DNA fingerprinting analysis of fledglings in a population of monogamous and polygynous male sparrows indicated the role of polygyny in increasing male reproductive success. Furthermore, paternity costs were absent in Savannah sparrows due to simultaneous polygyny that was exhibited by male sparrows.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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Assessment of the quality of copulation partners in the monogamous Bearded tit
Article Abstract:
The pre-copulatory behavior of the Bearded tit, Panurus biarmicus, was analyzed during the breeding season to determine the motivation behind female resistance behavior. Analysis of female resistance behavior in monogamous Bearded tits during chase-flights and copulations indicated a high frequency of chase-flights in females of high quality males compared to low quality males. Furthermore, female pre-copulatory behavior promoted sperm competition among male Bearded tits.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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Copulation rate and sperm use by female bearded tits, Panurus biarmicus
Article Abstract:
Variation in copulation rate and the number of the sperm present in the reproductive tract of female bearded tits, Panurus biarmicus, were determined to examine the mechanistic and functional aspects of sperm competition in this species. The rate of sperm loss in this species is relatively high necessitating repeated copulation even during the egg-laying period to ensure fertilized eggs. This is consistent with the fertility insurance hypothesis.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1998
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