Structural Colors of Tiger Beetles and Their Role in Heat Transfer through the Integument
Structural Colors of Tiger Beetles and Their Role in Heat Transfer through the Integument
复制标题
虎甲虫的结构颜色及其在外皮传热中的作用
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
N. F. Hadley
中科院分区：
文献类型：
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作者：
T. Schultz;N. F. Hadley
通过比较两种多形态虎甲虫（Cicinophelus）的亮金属和无色形态的昆虫表皮的反射率和热增益，研究了昆虫表皮中干涉（金属）色的热意义。使用透射电子显微镜确定颜色差异的表皮基础。在400~700 nm波长范围内，金蝉蓝绿色金属角质层的反射率比黑色角质层高6.9%，而在250~2000 nm波长范围内，两者的反射率相差仅1.2%。与此相反，C.福尔摩沙在可见光区的反射率比同一物种的金属红色鞘翅高21%，在近红外区的反射率高35%。在封闭的室内用卤钨灯的可见光对两个鞘翅进行加热，没有观察到彩虹色绿色和黑色鞘翅（鞘翅）的超温差异。Horni（平均差异= 0.01 ℃）。比较福尔摩沙的白色和金属红色鞘翅，金属红色鞘翅获得了显著更高的温度过度（平均差异= 2.2 ℃）。我们的研究结果证实，虎甲虫鞘翅中的金属着色不能有效地减少来自太阳辐射的热量，但在可比的环境条件下，白色鞘翅的甲虫可能会经历显着低于黑色或彩虹色甲虫的体温。
The thermal significance of interference (metallic) colors in insect cuticles was investigated by comparing the reflectivities and heat gain of cuticles from brightly metallic and achromatic morphs of two polymorphic tiger beetle species (genus Cicindela). The cuticular basis of color differences was determined using transmission electron microscopy. The reflectivities of metallic blue-green cuticle from Cicindela horni were 6.9% higher than black cuticle from the same species at wavelengths between 400 and 700 nm, but differences between 250 and 2,000 nm were only 1.2%. In contrast, the white elytra of C. formosa were 21% more reflective in the visible and 35% more reflective in the near-infrared than metallic red elytra from the same species. When elytra were heated in pairs within a closed chamber by visible light from a tungstenhalogen lamp, no differences were observed in the temperature excesses of iridescent green and black cuticles (elytra) of C. horni (mean difference = 0.01 C). In comparisons of white and metallic red elytra of C formosa, the metallic red elytra attained significantly higher temperature excesses (mean difference = 2.2 C). Our results confirm that metallic colorations in the elytra of tiger beetles are not effective in reducing heat gain from solar radiation, but that beetles with white elytra likely experience significantly lower body temperatures than either black or iridescent beetles under comparable environmental conditions.