Visual ＂playback＂ of colorful signals in the field supports sensory drive for signal detectability  

作　　者：Alex R. GUNDERSON Leo J. FLEISHMAN Manuel LEAL 

机构地区：[1]Department of Integrative Biology, University of California, Berkeley, CA, 94720, USA [2]Department of Biology, Union College, Schenectady, NY, 12308, USA [3]Division of Biological Sciences, University of Missouri, 105 Tucker Hall, Columbia, MO, 65211, USA

出　　处：《Current Zoology》2018年第4期493-498,共6页动物学报（英文版）

摘　　要：Colorful visual signals are important systems for investigating the effects of signaling environ ments and receiver physiology on signal evolution as predicted by the sensory drive hypothesis. Support for the sensory drive hypothesis on color signal evolution is mostly based on document ing correlations between the properties of signals and habitat conditions under which the signals are given （i.e., a correlational approach） and less commonly on the use of mathematical models that integrate representations of visual environments, signal properties, and sensory systems （i.e., a functional approach）. Here, we used an experimental approach in the field to evaluate signal efficacy of colorful lizard throat fans called dewlaps that show geographic variation in the lizard Anolis cristatellus. We used a remote controlled apparatus to display ＂fake dewlaps＂ to wild lizards to test for adaptive divergence in dewlap brightness （i.e., perceived intensity） among populations in situ. We found evidence of local adaptation in dewlap brightness consistent with the sensory drive hypothesis. Specifically, dewlaps that had the brightness characteristics of local lizards were more likely to be detected than those with the brightness characteristics of nonlocal lizards. Our findings indicate that simplified mathematical representations of visual environments may allow robust estimates of relative detectability or conspicuousness in natural habitats. We have shown the feasibility of evaluating color signal efficacy experimentally under natural conditions and dem onstrate the potential advantages of presenting isolated components of signals to an intended re ceiver to measure their contribution to signal function.

关 键 词：ANOLIS color signal sensory drive signal evolution 

分 类 号：TP393.07[自动化与计算机技术—计算机应用技术] U665[自动化与计算机技术—计算机科学与技术]