BEHAVIORAL THERMOREGULATION - ORIENTATION TOWARD SUN IN HERRING GULLS
BEHAVIORAL THERMOREGULATION - ORIENTATION TOWARD SUN IN HERRING GULLS
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DOI：
10.1126/science.635577
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发表时间：
1978-01-01
期刊：
影响因子：
56.9
通讯作者：
KELTY, M
中科院分区：
文献类型：
--
作者：
LUSTICK, S;BATTERSBY, B;KELTY, M
朝向太阳的方向加上姿势的变化最大限度地减少了成年银鸥在繁殖季节的净辐射增益。吸收的太阳辐射减少是由于暴露在直射阳光下的表面积减少以及吸收率降低，因为当鸟朝向太阳时，入射角使得只有白色表面接收直射阳光。在低风速（0-0.6 m/s）和环境温度高于下临界温度时，鸟儿旋转 180 度。白天时，始终面向太阳。
Orientation toward the sun combined with postural changes minimized the net radiation gain on the adult herring gull during the breeding season. The decrease in absorbed solar radiation was due to reduced surface area exposed to direct sunlight and to reduced absorptivity since, when the bird orients toward the sun, the angle of incidence is such that only the white surfaces receive direct sunlight. At low wind velocities (0-0.6 m/s) and ambient temperatures above the lower critical temperature, the birds rotated 180.degree. during the day, always facing the sun.