Variation in Conspicuousness among Populations of an Iguanid Lizard, Sauromalus obesus (= ater)
Variation in Conspicuousness among Populations of an Iguanid Lizard, Sauromalus obesus (= ater)
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鬣蜥蜥蜴 Sauromalus obesus (= ater) 种群间显着性的变化
DOI：
10.1643/ch-02-28r
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发表时间：
2003
期刊：
影响因子：
2.6
通讯作者：
Matthew A. Kwiatkowski
中科院分区：
文献类型：
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作者：
Matthew A. Kwiatkowski
生物体的颜色模式的外观是许多变量的函数，包括观察生物体的背景。因此，当脱离上下文时看起来相似或显眼的颜色图案，在现实中，当在自然环境中观察时，可能会显得非常不同。我调查了相对显着的chuckwallas，Sauromalus obesus（= ater）在三个种群中，男性在他们的着色不同。男性和女性chuckwallas的颜色模式进行了比较的岩石上的个人观察晒太阳或显示的背景颜色。还收集了捕食压力和热环境的数据，看看是否有任何关联的显着。雄性尾和身体的显著性，以及雌性尾的显著性，在三个群体之间存在差异。在所有种群中，雄性尾色比雄性体色更明显，在所有种群中，雄性比雌性更明显。然而，男性和女性并不是同样明显的人群中，女性从一个人口是男性从不同的人口一样显眼。引人注目似乎是负相关的捕食压力。几乎没有证据表明，热的考虑影响三个种群之间的颜色变化。chuckwalla显着性的作用也讨论了性选择的背景下。
Abstract The appearance of an organism's color pattern is a function of numerous variables, including the background on which the organism is observed. Hence, color patterns that appear similar or conspicuous when taken out of context, may, in reality, appear quite different when viewed in a natural setting. I investigated the relative conspicuousness of chuckwallas, Sauromalus obesus (= ater) among three populations in which males differ in their coloration. The color pattern of male and female chuckwallas was compared to the background color of rocks on which individuals were observed basking or displaying. Data were also collected on predation pressures and the thermal environment to see whether there was any association with conspicuousness. Male tail and body conspicuousness, and female tail conspicuousness, varied among the three populations. In all populations, male tail color was more conspicuous than male body color and, within all populations, males were more conspicuous than females. However, males and females were not equally conspicuous among populations; females from one population were as conspicuous as males from a different population. Conspicuousness appeared to be negatively associated with predation pressures. Little evidence was found to suggest that thermal considerations influenced color variation among the three populations. The role of chuckwalla conspicuousness is also discussed in the context of sexual selection.