Electrophoretic Demonstration of the Hybrid Origin of the Gynogenetic Teleost Poecilia formosa
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منابع مشابه
Repeatability of female preferences in a unisexual–bisexual mating system
Background: A gynogenetic species is a hybrid species in which females must mate with males of their parental species to initiate egg development, but inheritance is strictly maternal. Question: Is the mating preference of an all-female, gynogenetic fish and its parental species repeatable? Organisms: The Amazon molly, Poecilia formosa, is a livebearing gynogenetic fish of hybrid origin. Its pa...
متن کاملMale permissiveness in a unisexual–bisexual mating complex promotes maintenance of a vertebrate unisexual sperm-dependent species
Unisexual–bisexual mating complexes are found when an all female sperm-dependent (gynogenetic or hybridogenetic) species relies on heterospecific males for reproduction. Mistakes in species recognition or discrimination on the part of the males are fundamental for the persistence of unisexual–bisexual mating systems, but should be selected against because mating with heterospecific females does...
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Feeding rates of the gynogenetic Amazon molly Poecilia formosa and one of its sexual hosts, the sailfin molly Poecilia latipinna, were measured under winter and summer temperature conditions. Food consumption of the unisexual P. formosa in winter conditions was significantly higher than that of P. latipinna, and it is hypothesized that the resulting food stress might have an important influence...
متن کاملMonophyletic origin of multiple clonal lineages in an asexual fish (Poecilia formosa).
Despite the advantage of avoiding the costs of sexual reproduction, asexual vertebrates are very rare and often considered evolutionarily disadvantaged when compared to sexual species. Asexual species, however, may have advantages when colonizing (new) habitats or competing with sexual counterparts. They are also evolutionary older than expected, leaving the question whether asexual vertebrates...
متن کاملMating preferences of Amazon mollies (Poecilia formosa) in multi-host populations
Gynogenesis is a peculiar mode of clonal reproduction in which eggs need to be pseudo-fertilized by sperm, but the male genes are not passed on to the offspring. One mating system in which gynogenesis is found involves a unisexual hybrid, the Amazon molly (Poecilia formosa), which typically uses males of its two parental species as sperm donors. Most gynogenetic lineages do not sexually parasit...
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تاریخ انتشار 2016