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- W2059120478 abstract "Heterosexual courtship trials were staged between dusky salamanders of two species (Desmognathus fuscus and D. santeetlah) from two allopatric populations in the southern Appalachian Mountains of eastern North America. Two experiments were conducted in order to test for effects of experimental design on estimates of the strength of sexual isolation between these species. In Experiment 1, frequencies of interspecific mating were determined when: (1) a male was presented with a conspecific and a heterotypic female successively; and (2) both types of females were presented simultaneously to a male. The frequency of interspecific mating by male D. fuscus was greatest when females were presented successively. The frequency of interspecific mating by male D. santeetlah was not influenced by method of female presentation. An index of sexual isolation of +0.29 was obtained between D. fuscus and D. santeetlah when females were presented successively, and of +0.63 when females were presented simultaneously. In Experiment 2, interspecific mating frequencies were determined in courtship arenas of two different sizes. No significant effect of arena size on frequency of interspecific mating was found for D. fuscus. In D. santeetlah, a trend towards greater mating frequency in small arenas was almost significant. These results suggest that interspecific mating frequencies (and thus estimates of the strength of sexual isolation between populations or species) may be sensitive to the experimental design employed. The validity and generality of this conclusion for other animals is an urgent, empirical issue." @default.
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- W2059120478 date "1990-07-01" @default.
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- W2059120478 title "Frequency of interspecific mating in salamanders of the plethodontid genus <i>Desmognathus</i> : different experimental designs may yield different results" @default.
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- W2059120478 doi "https://doi.org/10.1111/j.1469-7998.1990.tb04012.x" @default.
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