Ecomorphological Differences in Toepad Characteristics between Mainland and Island Anoles
Ecomorphological Differences in Toepad Characteristics between Mainland and Island Anoles
复制标题
大陆与岛屿变色蜥趾甲特征的生态形态差异
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
J. Losos
中科院分区：
文献类型：
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作者：
Thomas E. Macrini;D. Irschick;J. Losos
长鼻龙（Anolis, Chamaeleolis, Chamaelinorops, Phenacosaurus）在亚趾趾的大小和形状上存在很大差异。为了解决两个问题，我们对79种变色蜥蜴进行了取样。首先，脚垫的大小与栖息地的使用有显著关系吗？第二，来自中南美洲大陆的变色蜥与加勒比变色蜥在脚掌的大小或脚掌形状与栖息地使用之间的关系上是否有所不同？在所有的变色蜥中，脚掌大小随着栖木高度和直径的增加而增加，尽管当身体大小的影响被消除时，这些关系就减弱了。这两个地区的变色蜥足趾在形态上存在差异。与大陆物种相比，加勒比变色蜥相对于口鼻长度有更大的趾垫和更大的身体尺寸。趾部形态与栖地利用特征的关系在两类群间无显著差异。然而，去除大小的影响后，加勒比变色蜥的脚掌相对于栖木的高度和直径都更大更宽。这些发现表明，生活在岛屿栖息地的变色蜥可能需要比大陆变色蜥更大的脚趾来利用它们的树木栖息地。这些趾垫形态差异的潜在功能后果为未来的研究提供了一个有希望的途径。
Abstract Anoles (Anolis, Chamaeleolis, Chamaelinorops, Phenacosaurus) differ greatly in size and shape of their subdigital toepads. We sampled 79 anole species to address two issues. First, is toepad size significantly related to habitat use? Second, do anoles from mainland Central and South America differ from Caribbean anoles in either the size of their toepads or in the relationship between toepad shape and habitat use? Among all anoles, toepad size increases with both perch height and diameter, although when the effects of body size are removed, these relationships are weakened. Morphological differences exist between toepads of anoles from the two regions. Caribbean anoles have larger toepads relative to snout–vent length and wider pads at larger body sizes compared to mainland species. Relationships between toepad morphology and habitat use characteristics do not differ significantly between the two groups of anoles. However, with effects of size removed, Caribbean anoles have larger and wider toepads relative to both perch height and diameter. These findings suggest that anoles in island habitats may require larger toepads than mainland anoles to use their arboreal habitats. The potential functional consequences of these differences in toepad morphology provide a promising avenue for future studies.