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生物学
Female and male visually based mate preferences are consistent with reproductive isolation between populations of the Lake Malawi endemic Labeotropheus fuelleborni
<正> Sexual selection via female mate choice is thought to have played a key role in the speciation of haplochromine cichlids,but a dominant role for visual signals in such processes has lately been called into question. In addition, the possible role ofmale mating preferences in haplochromine speciation has been little studied. We studied patterns of both female and male matechoice, based exclusively on visual signals, in order to evaluate potential reproductive isolation between two populations of theLake Malawi haplochromine Labeotropheus fuelleborni. In the first experiment, females were allowed to choose between twomales, one from the same population and the other allopatric with respect to the female. Females in this experiment respondedmore frequently to males from their own population. Similarly, the males in these trials displayed more frequently when presentedwith females of their own population. In the second experiment, a female was allowed to choose between two males, either bothfrom her own population or both allopatric. In these trials, both males and females from the Katale population interacted significantlymore frequently in settings in which all three individuals were from the same population ("same-population trios"), and those fromthe Chipoka population showed a similar trend. Thus, patterns in both male and female courtship behavior suggest that visual signalscontribute to at least incipient reproductive isolation between populations of L. fuelleborni
3 0
Current Zoology
2010年01期

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