Sperm competition-induced plasticity in the speed of spermatogenesis

Giannakara A, Schärer L, Ramm SA (2016)
BMC Evolutionary Biology 16: 60.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
Background Sperm competition between rival ejaculates over the fertilization of ova typically selects for the production of large numbers of sperm. An obvious way to increase sperm production is to increase testis size, and most empirical work has focussed on this parameter. Adaptive plasticity in sperm production rate could also arise due to variation in the speed with which each spermatozoon is produced, but whether animals can respond to relevant environmental conditions by modulating the kinetics of spermatogenesis in this way has not been experimentally investigated. Results Here we demonstrate that the simultaneously hermaphroditic flatworm Macrostomum lignano exhibits substantial plasticity in the speed of spermatogenesis, depending on the social context: worms raised under higher levels of sperm competition produce sperm faster. Conclusions Our findings overturn the prevailing view that the speed of spermatogenesis is a static property of a genotype, and demonstrate the profound impact that social environmental conditions can exert upon a key developmental process. We thus identify, to our knowledge, a novel mechanism through which sperm production rate is maximised under sperm competition.
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BMC Evolutionary Biology
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16
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60
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Article Processing Charge funded by the Deutsche Forschungsgemeinschaft and the Open Access Publication Fund of Bielefeld University.
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Giannakara A, Schärer L, Ramm SA. Sperm competition-induced plasticity in the speed of spermatogenesis. BMC Evolutionary Biology. 2016;16:60.
Giannakara, A., Schärer, L., & Ramm, S. A. (2016). Sperm competition-induced plasticity in the speed of spermatogenesis. BMC Evolutionary Biology, 16, 60. doi:10.1186/s12862-016-0629-9
Giannakara, A., Schärer, L., and Ramm, S. A. (2016). Sperm competition-induced plasticity in the speed of spermatogenesis. BMC Evolutionary Biology 16, 60.
Giannakara, A., Schärer, L., & Ramm, S.A., 2016. Sperm competition-induced plasticity in the speed of spermatogenesis. BMC Evolutionary Biology, 16, p 60.
A. Giannakara, L. Schärer, and S.A. Ramm, “Sperm competition-induced plasticity in the speed of spermatogenesis”, BMC Evolutionary Biology, vol. 16, 2016, pp. 60.
Giannakara, A., Schärer, L., Ramm, S.A.: Sperm competition-induced plasticity in the speed of spermatogenesis. BMC Evolutionary Biology. 16, 60 (2016).
Giannakara, A, Schärer, L, and Ramm, Steven A. “Sperm competition-induced plasticity in the speed of spermatogenesis”. BMC Evolutionary Biology 16 (2016): 60.
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Daten bereitgestellt von Europe PubMed Central.

Bigger testes increase paternity in a simultaneous hermaphrodite, independently of the sperm competition level.
Vellnow N, Marie-Orleach L, Zadesenets KS, Schärer L., J Evol Biol 31(2), 2018
PMID: 29160913

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