The origin and evolution of a unisexual hybrid: Poecilia formosa. [PDF]
Philos Trans R Soc Lond B Biol Sci, 2008 Clonal reproduction in vertebrates can always be traced back to hybridization events as all known unisexual vertebrates are hybrids between recognized species or genetically defined races. Interestingly, clonal vertebrates often also rely on interspecific matings for their reproduction because gynogenesis (sperm-dependent parthenogenesis) and ...
Lampert KP, Schartl M.
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Do Females in a Unisexual-Bisexual Species Complex Differ in Their Behavioral Syndromes and Cortisol Production? [PDF]
Biology, 2021 Studies of suites of correlated behavioral traits (i.e., behavioral syndromes) aid in understanding the adaptive importance of behavioral evolution. Behavioral syndromes may be evolutionarily constrained, preventing behaviors from evolving independently,
James J. Muraco +3 more
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Developmental arcs of plasticity in whole movement repertoires of a clonal fish [PDF]
iScienceSummary: Developmental plasticity at the behavioral repertoire level allows animals to incrementally adjust their behavioral phenotypes to match their environments through ontogeny.
Sean M. Ehlman +5 more
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Quantifying the threat of extinction from Muller's ratchet in the diploid Amazon molly (
BMC Evolutionary Biology, 2008 Background The Amazon molly (Poecilia formosa) is a small unisexual fish that has been suspected of being threatened by extinction from the stochastic accumulation of slightly deleterious mutations that is caused by Muller's ratchet in non-recombining ...
Loewe Laurence, Lamatsch Dunja K
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Comparative analysis of the gonadal transcriptomes of the all-female species Poecilia formosa and its maternal ancestor Poecilia mexicana. [PDF]
BMC Res Notes, 2014 The Amazon molly, Poecilia formosa (Teleostei: Poeciliinae) is an unisexual, all-female species. It evolved through the hybridisation of two closely related sexual species and exhibits clonal reproduction by sperm dependent parthenogenesis (or gynogenesis) where the sperm of a parental species is only used to activate embryogenesis of the apomictic ...
Schedina IM +4 more
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Female sperm limitation in natural populations of a sexual/asexual mating complex (Poecilia latipinna, Poecilia formosa). [PDF]
Biol Lett, 2008 In sperm-dependent sexual/asexual mating systems, male mate choice is critical for understanding the mechanisms behind apparent stability observed in natural populations. The gynogenetic Amazon molly ( Poecilia formosa ) requires sperm from sexual males (e.g.
Riesch R, Schlupp I, Plath M.
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Behavioral responses of a clonal fish to perceived predation risk [PDF]
PeerJPredation threat is a major driver of behavior in many prey species. Animals can recognize their relative risk of predation based on cues in the environment, including visual and/or chemical cues released by a predator or from its prey.
Jonathan Aguiñaga +3 more
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Predator exposure early in life shapes behavioral development and individual variation in a clonal fish [PDF]
Scientific ReportsPredation risk is one of the most important factors generating behavioral differences among populations. In addition, recent attention focusses on predation as a potential driver of patterns of individual behavioral variation within prey populations ...
U. Scherer +5 more
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INTERSPECIFIC HYBRIDIZATION AND THE EVOLUTIONARY ORIGIN OF A GYNOGENETIC FISH, POECILIA FORMOSA [PDF]
Evolution, 1980 In recent years, largely through the application of allozyme techniques, several unisexual (thelytokous) vertebrates have been shown to be genetically equivalent to F1 hybrids of certain related bisexual species. The causal relationship, however, between interspecific hybridization and the origin of unisexuality has not been elucidated, and the role of
Turner, Bruce J. +2 more
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Stable inheritance of host species-derived microchromosomes in the gynogenetic fish Poecilia formosa. [PDF]
Genetics, 2007 Abstract B chromosomes are additional, usually unstable constituents of the genome of many organisms. Their origin, however, is often unclear and their evolutionary relevance is not well understood. They may range from being deleterious to neutral or even beneficial.
Nanda I +5 more
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