期刊
BIOLOGY LETTERS
卷 3, 期 2, 页码 134-136出版社
ROYAL SOC
DOI: 10.1098/rsbl.2006.0601
关键词
imprinting; mate choice; speciation
The Lake Victoria 'species flock' of cichlids is puzzling because reproductive isolation often occurs in the absence of substantial ecological differences among species. Theory predicts that this cannot evolve with most genetic mechanisms for mate choice. We provide the first evidence that learning, in the form of sexual imprinting, helps maintain reproductive isolation among closely related cichlid species. Using a cross-fostering experiment, we show that young females develop a sexual preference for males of their foster mothers' species, even reversing species assortative mating preferences. We suggest that learning creates favourable conditions for reproductive isolation to evolve.
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