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    Evidence for biased use of sperm sources in wild female giant cuttlefish (Sepia apama)

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    Naud Evidence.pdf (981.1Kb)
    Date
    2005-05-22
    Author
    Naud, Marie-Jose  Concept link
    Shaw, Paul W.  Concept link
    Hanlon, Roger T.  Concept link
    Havenhand, Jon N.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/240
    As published
    https://doi.org/10.1098/rspb.2004.3031
    DOI
    10.1098/rspb.2004.3031
    Keyword
     Sperm storage; Sperm genetic diversity; Mating system; Sperm competition; Sepia apama 
    Abstract
    In species where females store sperm from their mates prior to fertilization, sperm competition is particularly probable. Female Sepia apama are polyandrous and have access to sperm from packages (spermatangia) deposited by males onto their buccal area during mating and to sperm stored in internal sperm-storage organs (receptacles) located below the beak. Here, we describe the structure of the sperm stores in the female's buccal area, use microsatellite DNA analyses to determine the genetic diversity of stored sperm and combine these data with offspring genotypes to determine the storage location of paternal sperm. The number of male genotypes represented in the sperm receptacles was significantly lower than that found among the spermatangia. Estimation of the volumes of sperm contained in the receptacles and the spermatangia were statistically comparable; however, paternal sperm were more likely to have come from spermatangia than from the sperm receptacles. These results confirm a genetic polyandrous mating system in this species and suggest that fertilization pattern with respect to the sperm stores used is not random.
    Description
    Author Posting. © Royal Society, 2005. This article is posted here by permission of Royal Society for personal use, not for redistribution. The definitive version was published in Proceedings of the Royal Society of London B 272 (2005): 1047-1051, doi:10.1098/rspb.2004.3031.
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    • MRC Publications
    Suggested Citation
    Proceedings of the Royal Society of London B 272 (2005): 1047-1051
     

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