<br>蓝尾石龙子（Plestodion elegans）尾巴的个体发生颜色变化,Ecology and Evolution

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蓝尾石龙子（Plestodion elegans）尾巴的个体发生颜色变化
Ecology and Evolution ( IF 2.3 ) Pub Date : 2023-06-06 , DOI: 10.1002/ece3.10152
Chen Yang _{1,

2} , Siheng Chen ₃ , Jie Wang ₂

Affiliation

动物的个体发生颜色变化是一种有趣的与进化相关的现象，进化生物学家已经研究了几十年。然而，在动物的整个生命周期中获得定量和连续的颜色测量是一个挑战。为了了解尾色和性二色性的变化节奏，我们使用光谱仪测量了蓝尾石龙子（ Plestiodon elegans ）从出生到性成熟的尾色。选择Lab颜色空间是因为其简单、牢固、准确，并且依赖于观察者的视觉来测量石龙子的尾巴颜色。观察到石龙子的颜色指数（ L *、 a *、 b * 值）与生长时间之间存在很强的关系。两性尾部颜色的亮度从幼鱼到成鱼均呈下降趋势。此外，我们观察到两性之间颜色节奏的差异，这可能受到他们所使用的不同行为策略的影响。这项研究连续测量了石龙子从幼年到成年的尾部颜色变化，并深入了解了它们的性别差异。虽然这项研究没有提供直接证据来解释导致蜥蜴性别间二色性的潜在因素，但我们的发现可以为未来探索爬行动物个体发生颜色变化的可能机制的研究提供参考。

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Ontogenetic color change in the tail of blue-tailed skinks (Plestodion elegans)

Ontogenetic color change in animals is an interesting evolution-related phenomenon that has been studied by evolutionary biologists for decades. However, obtaining quantitative and continuous color measurements throughout the life cycle of animals is a challenge. To understand the rhythm of change in tail color and sexual dichromatism, we used a spectrometer to measure the tail color of blue-tailed skink (Plestiodon elegans) from birth to sexual maturity. Lab color space was selected due to its simplicity, fastness, and accuracy and depends on the visual sense of the observer for measuring the tail color of skinks. A strong relationship was observed between color indexes (values of L*, a*, b*) and growth time of skink. The luminance of tail color decreased from juveniles to adults in both sexes. Moreover, we observed differences in color rhythms between the sexes, which may be influenced by different behavioral strategies used by them. This study provides continuous measurements of change in tail color in skinks from juveniles to adults and offers insights into their sex-based differences. While this study does not provide direct evidence to explain the potential factors that drive dichromatism between the sexes of lizards, our finding could serve as a reference for future studies exploring possible mechanisms of ontogenetic color change in reptiles.

更新日期：2023-06-07

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