Context-dependent genetic benefits of polyandry in a marine hermaphrodite
نویسندگان
چکیده
منابع مشابه
Context-dependent genetic benefits of polyandry in a marine hermaphrodite.
Numerous studies emphasize the potential indirect (genetic) benefits of polyandry in animals with resource-free mating systems. In this paper, we examine the potential for these benefits to fuel sexual selection and polyandry in the hermaphroditic ascidian Pyura stolonifera. Individuals were designated either sire (sperm producers) or dam (egg producers) at random and crossed in a North Carolin...
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Behavioural ecology is currently undergoing a paradigm shift, with the traditional concepts of the choosy, monogamous female and the coadapted gene complex increasingly giving way to the realization that sexual reproduction engenders conflicts, promotes polyandry, and thereby provides females with a cryptic arsenal of postcopulatory processes with which to safeguard their investment in large, c...
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The maintenance of female polyandry has traditionally been attributed to the material (direct) benefits derived from male mating resources (e.g. nuptial gifts) accrued by multiple mating. However, genetic (indirect) benefits offer a more robust explanation since only polyandrous, not monandrous, females may gain both material benefits from multiple mating and genetic benefits from multiple sire...
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Multiple mating has clear fitness benefits for males, but uncertain benefits and costs for females. We tested for indirect genetic benefits of polyandry in a natural population, by using data from a long-term genetic and demographic study of lemon sharks (Negaprion brevirostris) at Bimini, Bahamas. To do so, we followed the fates of individuals from six cohorts (450 age-0 and 254 age-1 fish) in...
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www.sciencemag.org (this information is current as of November 22, 2008 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/322/5905/1241 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/322/5905/1241/DC1 can be f...
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ژورنال
عنوان ژورنال: Biology Letters
سال: 2007
ISSN: 1744-9561,1744-957X
DOI: 10.1098/rsbl.2007.0438