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Preference status does not indicate intrinsic quality differences in Drosophila pseudoobscura

Integrative Zoology 2010年第3期5卷 198-207页

作者： Yong-Kyu KIM Mary Beth WEBER Wyatt W.ANDERSON patricia adair gowaty Department of Genetics University of GeorgiaAthensGeorgiaUSA Rollins School of Public Health Emory UniversityAtlantaGeorgiaUSA Department of Ecology and Evolutionary Biology and Institute of the Environment University of CaliforniaLos AngelesCaliforniaUSA Smithsonian Tropical Research Institute APOUSA

The good genes hypothesis states that choosers prefer individuals of high intrinsic quality to individuals of lower intrinsic *** in longevity is thought to reflect,in part,intrinsic quality differences of individuals in addition to the costs of mating and *** we report longevity variation of Drosophila pseudoobscura,a species in which previous experiments have demonstrated that individual mate preferences(pre-touching mate assessments)of females and males are associated with enhanced numbers of eclosed(adult)offspring and higher egg-to-adult survival(offspring viability).Using mate assessment arenas and protocols similar to those in a previous experiment that demonstrated fitness benefits to breeders and their offspring of mating with individuals they preferred,we tested the following predictions:(i)preferred discriminatees live longer than non-preferred discriminatees;(ii)males live longer than females;and(iii)virgins live longer than mated *** experiment yielded 938 individuals for longevity *** and mating status affected longevity:males lived longer than females,virgin females lived longer than mated females,but there were no differences in longevity for mated and virgin ***-preferred discriminatees of both sexes survived as long as preferred discriminatees,a result inconsistent with the prediction of the good genes hypothesis for mate *** our knowledge,this is the first demonstration of the cost of reproduction for females in *** and of longevity variation of preferred and non-preferred discriminatees.

关键词： longevity mate assessment mate choice mate preferences.

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