Sperm Viability and Sperm Competition in Insects
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چکیده
منابع مشابه
Sperm Viability and Sperm Competition in Insects
Sperm quality plays an important role in vertebrates in determining which male has the advantage when two or more males compete to fertilize a female's ova. In insects, however, the importance of sperm quality has never been considered, despite sperm competition being widespread and well studied in this group. We tested the hypothesis that sperm viability, measured as the proportion of live spe...
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Sperm competition has been demonstrated in a variety of insects and is, in addition to ecological resource distribution and sex ratios, generally believed to play a major role in the evolution of insect reproductive strategies and mating systems. In this paper, I review the main theories and some of the empirical evidence regarding sperm competition in insects. Sperm utilization is shaped by se...
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We investigated how sperm morphology varies across 16 species of shorebirds in the Scolopacidae, Charadriidae, and Jacanidae. Sperm were significantly longer in nonmonogamous than in socially monogamous species. Nonmonogamous species also I Received 27 January 1999. Accepted 22 June 1999. 2Current address: Department of Zoology, Private Bag 4800, University of Canterbury, Christchurch, New Zeal...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2002
ISSN: 0960-9822
DOI: 10.1016/s0960-9822(01)00647-9