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Spermatozoal competition in common carp (Cyprinus carpio): what is the primary determinant of competition success?

Abstract : The percentage of sperm motility (92-100%), spermatozoan velocity (112-163 microm.s(-1)) and control hatching rates (83-96%) were evaluated for each of six gold and five green male common carp (Cyprinus carpio). In all 30 possible paired combinations of sperm-competition tests, hatching rates of 90-97% were achieved. The mean percentage of offspring sired was strongly influenced by the male used (P < 0.001, R2 = 0.91). The best male sired an average of 88% of the offspring in its competition tests, and the worst male sired only 5%. Spermatozoan-quality parameters could explain only part of the variation in male competitive ability. The male effects alone explained 91.4% of the observed variance, consisting of 17.1% explained by spermatozoan motility and 32.5% by control hatching rates in single fertilizations. Undetermined male effects explained 41.8%. The velocity of spermatozoa had no effect on the outcome of sperm competition. Neither was there any link between spermatozoan velocity and hatching rate in a control hatching test, whereas there was an effect of motility on hatching rate in this same test.
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https://hal.inrae.fr/hal-02681840
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Submitted on : Sunday, May 31, 2020 - 11:56:48 PM
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Otmar Linhart, M. Rodina, D. Gela, M. Kocour, Marc Vandeputte. Spermatozoal competition in common carp (Cyprinus carpio): what is the primary determinant of competition success?. Reproduction -Cambridge- Supplement-, 2005, 130, pp.705-711. ⟨10.1530/rep.1.00541⟩. ⟨hal-02681840⟩

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