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首页> 外文期刊>Ecological research >Reflectance and artificial nest experiments of reptile and bird eggs imply an adaptation of bird eggs against ultraviolet
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Reflectance and artificial nest experiments of reptile and bird eggs imply an adaptation of bird eggs against ultraviolet

机译：爬行动物和鸟卵的反射率和人工巢实验表明，鸟卵对紫外线具有适应性

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摘要

Interspecific comparative studies in trait responses to nest predation will help uncover potential costs associated with changes in nest predation risk that may constrain the degree of the response. Reptiles build large mounds of sand, soil or compost in which they bury and leave their eggs after laying. As their eggs are not exposed, reptiles consistently lay immaculate white eggs; while some birds that also lay immaculate white eggs place their nests in exposed sites under sunlight. Comparing the spectrum of reptile and bird eggs, especially in the ultraviolet (UV) region, may help us understand the evolution of coloration in bird eggs. We measured white immaculate eggs from four species of turtle and three species of birds by spectrometer, and compared their hue, chroma, UV brightness, and total brightness. Our results indicated that the UV reflectance of bird eggs consistently exhibited peaks and troughs in waveform that obviously differed from that of turtle eggs, which rising gradually from 300 to 400 nm. This finding implies that bird eggs have been released from enclosed nests, like those of reptiles, and have thus evolved an adaptation in UV reflectance as a signal. Furthermore, artificial nest experiments indicated that predation rates of bird eggs were significantly higher than those of turtle eggs, implying that such a signal might exist. Our study provides baseline data and perspective for further research on the evolution of egg coloration between reptiles and birds.
机译：种间对巢穴捕食性状反应的比较研究将有助于发现与巢捕食风险变化相关的潜在成本，这些变化可能会限制反应的程度。爬行动物会在沙子，土壤或堆肥中筑成一堆大堆，然后将其埋葬并在产卵后留下卵。由于它们的卵未暴露，所以爬行动物始终会产下无暇的白卵。而有些也会下垂无瑕白蛋的鸟儿则将鸟巢放在阳光下暴露的地方。比较爬行动物和鸟卵的光谱，尤其是在紫外线（UV）区域，可以帮助我们了解鸟卵着色的演变。我们用分光光度计测量了四种乌龟和三种鸟的白色无瑕卵，并比较了它们的色相，色度，紫外线亮度和总亮度。我们的结果表明，禽蛋的紫外线反射率始终呈现出与海龟蛋明显不同的波峰和波谷，乌龟蛋的波峰和波谷从300 nm逐渐上升到400 nm。这一发现暗示，像爬行动物一样，鸟卵已从封闭的巢中释放出来，因此已经适应了紫外线反射信号。此外，人工巢实验表明，禽蛋的捕食率明显高于乌龟蛋，这表明可能存在这种信号。我们的研究为进一步研究爬行动物和鸟类之间的蛋色演变提供了基线数据和前景。

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  • 来源
    《Ecological research》 |2016年第1期|105-110|共6页
  • 作者

    Wang Jichao; Yang Canchao; Shi Haitao; Liang Wei;

  • 作者单位

    Hainan Normal Univ, Minist Educ, Key Lab Trop Anim & Plant Ecol, Coll Life Sci, Haikou 571158, Peoples R China;

    Hainan Normal Univ, Minist Educ, Key Lab Trop Anim & Plant Ecol, Coll Life Sci, Haikou 571158, Peoples R China;

    Hainan Normal Univ, Minist Educ, Key Lab Trop Anim & Plant Ecol, Coll Life Sci, Haikou 571158, Peoples R China;

    Hainan Normal Univ, Minist Educ, Key Lab Trop Anim & Plant Ecol, Coll Life Sci, Haikou 571158, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Bird egg; Nest predation; Turtle egg; Ultraviolet spectrum; UV reflectance;

    机译：鸟卵;巢捕食;乌龟卵;紫外线光谱;紫外线反射率;

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