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Behavioral isolation, test designs, and Kaneshiro's hypothesis


American Naturalist 149(3): 527-539
Behavioral isolation, test designs, and Kaneshiro's hypothesis
An evaluation of the Markow criticism of the Kaneshiro hypothesis was undertaken. The Kaneshiro hypothesis states that the direction of evolution can be inferred by examining the direction of asymmetrical behavioral reproductive isolation. The Markow criticism states that the sign and magnitude of the indexes of behavioral reproductive isolation may vary with the procedures employed to measure them. The criticism was evaluated by applying 3 common methods--female choice, male choice, and multiple choice--used for measuring behavioral reproductive isolation to the species Drosophila silvestris and D. heteroneura. A similar direction of asymmetry for all 3 testing methods in the pairing of the 2 species was observed. By contrast, the pairing between 2 populations of D. silvestris did not yield a consistent direction of asymmetry. Therefore, different methods for testing the direction of behavioral reproductive isolation afford similar results at the interspecific level but not at the intraspecific level.


Accession: 002763487

DOI: 10.2307/2463381



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