Phenotypic variability of physiological traits in populations of sexual and asexual whiptail lizards (genus Cnemidophorus)

dc.contributor.authorCullum, Alistair J.en_US
dc.contributor.cuauthorCullum, Alistair J.en_US
dc.date.accessioned2014-06-27T13:30:38Z
dc.date.available2014-06-27T13:30:38Z
dc.date.issued2000en_US
dc.date.year2000en_US
dc.description.abstractOne of the major potential disadvantages to asexual reproduction is believed to be a reduction in phenotypic variability. This study represents an empirical test for such a reduction in the variance of physiological traits in parthenogenetic species of the lizard genus Cnemidophorus. Five performance traits (burst speed, endurance, maximal exertion, standard metabolic rate and evaporative water loss rate) were examined in four asexual species and the sexual species that hybridized to produce them. A phylogenetically controlled analysis revealed less trait variance in asexual species for the first three traits, but no detectable differences between asexual and sexual species for the other two traits. A second analysis examining the average shape of trait distributions in the two types of species suggests that sexual populations produce distributions with more elongate tails than do asexual populations. Thus, part of the reason for increased variance in sexual populations may be a greater tendency for these populations to produce extreme phenotypes.en_US
dc.description.issue7en_US
dc.description.pages841-855en_US
dc.description.volume2en_US
dc.identifier.citationCullum, A. J. (2000). Phenotypic variability of physiological traits in populations of sexual and asexual whiptail lizards. Evolutionary Ecology Research. 2(7), 841-855.en_US
dc.identifier.issn1522-0613en_US
dc.identifier.issn1522-0613en_US
dc.identifier.urihttp://hdl.handle.net/10504/55738
dc.program.unitCollege of Arts and Sciencesen_US
dc.program.unitBiologyen_US
dc.publisherEvolutionary Ecology, Ltd.en_US
dc.rights.holderAlistair J. Cullumen_US
dc.titlePhenotypic variability of physiological traits in populations of sexual and asexual whiptail lizards (genus Cnemidophorus)en_US
dc.title.workEvolutionary Ecology Researchen_US
dc.typeJournal Articleen_US
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