关键词: Bile pigment Granule scattering Reflectance spectrum Spectral sensitivity

Mesh : Female Animals Bees Bile Pigments Hair Thorax

来  源:   DOI:10.1007/s00114-023-01854-9   PDF(Pubmed)

Abstract:
Carpenter bees can display distinct colouration patterns due to structural coloured wings and/or coloured hairs on their bodies. Females of the sexually dichromatic Xylocopa caerulea are marked by strongly blue-pigmented hairs on the head, thorax and abdomen. The thorax of female X. confusa is covered by yellow-pigmented hairs. The diffuse pigmentary colouration of the blue and yellow hairs is effectively enhanced by strongly scattering granules. The absorption spectrum of the blue pigment of X. caerulea has a maximum at 605 nm and is probably a bilin (a bile pigment). The absorption spectrum of the yellow pigment of X. confusa has a maximum at 445 nm and may be a pterin. The thoracic hairs of female X. confusa contain also a minor amount of the bilin. The reflectance spectra of the pigmented hairs suggest that the pigments are tuned to the spectral sensitivity of the bees\' photoreceptors and provide spectral contrast with a green background.
摘要:
木匠蜜蜂由于其身体上的结构性有色翅膀和/或有色毛发而可以显示出不同的着色图案。有性二色性Xylocopacaerulea的雌性在头上有强烈的蓝色色素毛发,胸部和腹部。雌性X.confusa的胸部被黄色的头发覆盖。强烈散射颗粒有效地增强了蓝色和黄色毛发的扩散颜料着色。X.caerulea的蓝色颜料的吸收光谱在605nm处具有最大值,并且可能是bilin(胆汁颜料)。X.confusa的黄色颜料的吸收光谱在445nm处具有最大值,并且可以是蝶呤。雌性X.confusa的胸毛也含有少量的bilin。色素毛发的反射光谱表明,色素被调整到蜜蜂光感受器的光谱灵敏度,并提供具有绿色背景的光谱对比。
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