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The pervasive effects of lighting environments on sensory drive in bluefin killifish： an investigation into male/male competition, female choice, and predation

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Current Zoology 2018年第4期64卷 499-512页

作者： Lisa D. MITCHEM Shannon STANIS Nicholas M. SUTTON Zachary TURNER Rebecca C. FULLER School of Integrative Biology University of Illinois Urbana IL 61801 USA Department of Biology University of Virginia Charlottesville VA 22904 USA Department of Mathematics University of Illinois Urbana IL 61801 USA

Sensory drive predicts that the conditions under which signaling takes place have large effects on signals, sensory systems, and behavior. The coupling of an ecological genetics approach with sen sory drive has been fruitful. An ecological genetics approach compares populations that experi ence different environments and asks whether population differences are adaptive and are the result of genetic and/or environmental variation. The multifaceted effects of signaling environ ments are wellexemplified by the bluefin killifish. In this system, males with blue anal fins are abundant in tanninstained swamps that lack UV/blue light but are absent in clear springs where UV/blue light is abundant. Past work indicates that lighting environments shape genetic and envir onmental variation in color patterns, visual systems, and behavior. Less is known about the select ive forces creating the across population correlations between UV/blue light and the abundance of blue males. Here, we present three new experiments that investigate the roles of lighting environ ments on male competition, female mate choice, and predation. We found strong effects of lighting environments on male competition where blue males were more likely to emerge as dominant in teastained water than in clear water. Our preliminary study on predation indicated that blue males may be less susceptible to predation in teastained water than in clear water. However, there was little evidence for female preferences favoring blue males. The resulting pattern is one where the effects of lighting environments on genetic variation and phenotypic plasticity match the direction of selection and favor the expression of blue males in swamps.

关键词： Lucania goodei adaptive plasticity intrasexual selection male competition private communication predation

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