DEFENSE STRATEGIES AGAINST ENVIRONMENTAL HEAT STRESS IN BIRDS
DEFENSE STRATEGIES AGAINST ENVIRONMENTAL HEAT STRESS IN BIRDS
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DOI：
10.1080/00212210.1989.10688624
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
J. Marder;Y. Arieli;J. Ben-Asher
中科院分区：
文献类型：
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作者：
J. Marder;Y. Arieli;J. Ben-Asher
摘要当热适应鸽子暴露在50-60°C的环境温度下时，极高的皮肤蒸发冷却，加上羽毛的高绝缘能力，为鸟类创造了一个生理过程可以正常调节的小气候。通过巧妙地使用这种冷却服装，鸽子保持其休息代谢率，并调节低皮肤和体温，既不喘气也不抖动。这些生理上的成就与北极动物的成就不相上下。因此，在动物向极端高温环境进化的过程中，选择似乎有利于以最低的能量成本适应极端寒冷的北极和世界上最热的沙漠。
ABSTRACT When heat-acclimated pigeons are exposed to ambient temperatures of 50–60°C, extremely high cutaneous evaporative cooling, together with a high insulative capacity of the feather coat, creates for the bird a microclimate within which physiological processes can be regulated normally. By skillfully using this cooling garment, pigeons maintain their resting metabolic rate and regulate low skin and body temperatures, employing neither panting nor gular fluttering. These physiological achievements parallel those of arctic animals. Hence, during animal evolution towards inhabiting extreme thermal environments, selection seems to have favored adaptations at the lowest energy cost in both the extreme cold arctic and the hottest deserts of the world.