Female mate choice and the potential for ornament evolution in túngara frogs Physalaemus pustulosus

查看全文 作　　者：Michael [1,2]J.RYAN;Ximena [3]E.BERNAL;A.Stanley [4]RAND

机构地区：[1]Section of Integrative Biology C0930,University of Texas;[2]Smithsonian Tropical Research Institution;[3]Department of Biological Science,Texas Tech University;[4]Srnithsonian Tropical Research Institution

出　　处：《Current Zoology》索引2010年第56卷第3期,共15页

基　　金：funded by several grants from both the National Science Foundation;the Smithsonian Scholarly Studies Program 摘　　要：The potential for ornament evolution in response to sexual selection rests on the interaction between the permissivenessor selectivity of female preferences and the constraints on male development of signaling related traits. We investigate theformer by determining how latent female preferences either exaggerate the magnitude of current traits (i.e. elaborations) or favornovel traits (i.e. innovations). In tunngara frogs, females prefer complex mating calls (whine-chucks) to simple calls (whine only).The whine is critical for mate recognition while the chuck further enhances the attractiveness of the call. Here we use a combinationof synthetic and natural stimuli to examine latent female preferences. Our results show that a diversity of stimuli, includingconspecific and heterospecific calls as well as predator-produced and human-made sounds, increase the attractiveness of a callwhen added to a whine. These stimuli do not make simple calls more attractive than a whine-chuck, however. In rare cases wefound stimuli that added to the whine decrease the attractiveness of the call. Overall, females show strong preferences for bothelaborations and innovations of the chuck. We argue that the emancipation of these acoustic adornments from mate recognitionallows such female permissiveness, and that male constraints on signal evolution are probably more important in explaining whymales evolved their specific adornment. Experimentally probing latent female preferences for stimuli out of the species' range is auseful means to gain insights about the potential of female choice to influence signal evolution and thus the astounding diversityin male sexually-selected traits [Current Zoology 56 (3): 343-357, 2010]. 关键词：进化青蛙装饰择偶女性

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Female mate choice and the potential for ornament evolution in túngara frogs Physalaemus pustulosus

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