Delineating the roles of males and females in sperm competition
نویسندگان
چکیده
منابع مشابه
Delineating the roles of males and females in sperm competition.
Disentangling the relative roles of males, females and their interactive effects on competitive fertilization success remains a challenge in sperm competition. In this study, we apply a novel experimental framework to an ideally suited externally fertilizing model system in order to delineate these roles. We focus on the chinook salmon, Oncorhynchus tshawytscha, a species in which ovarian fluid...
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T is generally assumed that in animal species all the sperm from a heterozygote, I though genetically different, have the same functional properties; consequently they cannot compete in fertilization, and no selection is possible. This has been interpreted as meaning that genes stop functioning after the first meiotic division (MULLER and SETTLES 1927). An exception to this principle has been d...
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We analyse a co-evolutionary sexual conflict game, in which males compete for fertilizations (sperm competition) and females operate sperm selection against unfavourable ejaculates (cryptic female choice). For simplicity, each female mates with two males per reproductive event, and the competing ejaculates are of two types, favourable (having high viability or success) or unfavourable (where pr...
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During the latter half of the last century, evidence of reproductive competition between males and male selection by females led to the development of a stereotypical view of sex differences that characterized males as competitive and aggressive, and females as passive and choosy, which is currently being revised. Here, we compare social competition and its consequences for selection in males a...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society B: Biological Sciences
سال: 2013
ISSN: 0962-8452,1471-2954
DOI: 10.1098/rspb.2013.2047