Population models of sperm-dependent parthenogenesis

Journal of Theoretical Biology
David SchleyTim Sluckin

Abstract

Organisms that reproduce by sperm-dependent parthenogenesis are asexual clones that require sperm of a sexual host to initiate egg production, without the genome of the sperm contributing genetic information to the zygote. Although sperm-dependent parthenogenesis has some of the disadvantages of sex (requiring a mate) without the counterbalancing advantages (mixing of parental genotypes), it appears amongst a wide variety of species. We develop initial models for the density-dependent dynamics of animal populations with sperm-dependent parthenogenesis (pseudogamy or gynogenesis), based on the known biology of the common Enchytraeid worm Lumbricillus lineatus. Its sperm-dependent parthenogenetic populations are reproductive parasites of the hermaphrodite sexual form. Our logistic models reveal two alternative requirements for coexistence at density-dependent equilibria: (i) If the two forms differ in competitive ability, the form with the lower intrinsic birth rate must be compensated by a more than proportionately lower competitive impact from the other, relative to intraspecific competition, (ii) If the two forms differ in their intrinsic capacity to exploit resources, the sperm-dependent parthenogen must be superior in this r...Continue Reading

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Citations

Jul 9, 2005·Bulletin of Mathematical Biology·J A Stewart-CoxM Mogie
Jan 10, 2008·Proceedings. Biological Sciences·Hanna KokkoDaniel J Rankin
May 30, 2008·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Lukás CholevaKarel Janko
Aug 25, 2009·Journal of Theoretical Biology·K Janko, J Eisner
Oct 22, 2008·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Jan Engelstädter
Jun 17, 2010·Evolution; International Journal of Organic Evolution·Jonathan A Mee, Sarah P Otto
Jan 27, 2019·Scientific Reports·Karel JankoPeter Mikulíček

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