VOCAL REGULATION OF TEMPERATURE BY AVIAN EMBRYOS - A LABORATORY STUDY WITH PIPPED EGGS OF THE AMERICAN WHITE PELICAN
VOCAL REGULATION OF TEMPERATURE BY AVIAN EMBRYOS - A LABORATORY STUDY WITH PIPPED EGGS OF THE AMERICAN WHITE PELICAN
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DOI：
10.1016/s0003-3472(05)80999-6
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发表时间：
1990-11-01
期刊：
影响因子：
2.5
通讯作者：
EVANS, RM
中科院分区：
文献类型：
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作者：
EVANS, RM
当暴露于高于或低于正常平均孵化温度的温度下时，胚胎期的美国白色鹈鹕，Pelecanus erythrorhynchos，在一个分级的fasion中迅速而强烈地呼叫，然后很快停止呼叫时，温度恢复正常。通过将带皮蛋置于高于（50 ℃）的孵育温度，检测派力肯胚胎通过鸣叫调节其自身体温的能力。C）或以下（20. C）在替代孵化装置中正常，该装置在实验胚胎对加热或冷却作出反应时自动将孵化温度恢复到接近正常水平的短暂4分钟时间内。在这些条件下，胚胎温度最初漂移约2.5度。C从正常，然后稳定，直到2小时的实验期结束。当恢复到正常的孵化温度控制的电话举行的胚胎在另一个房间（蛋黄控制），体温漂移不规则，并倾向于环境，表明温度调节不能简单地通过随机调用。结果表明，后期派力肯胚胎能够发声调节温度提供父母或代理人适当地回应胚胎的电话。通过呼唤合作的父母来调节胚胎温度的声音在广泛的早熟鸟类和一些晚期鸟类中可能起作用。
When exposed to temperatures above or below normal mean incubation temperature, embryonic American white pelicans, Pelecanus erythrorhynchos, at the pipped egg stage called quickly and strongly in a graded fasion, then soon stopped calling when temperatures were returned to normal. The ability of pelican embryos to regulate their own body temperature by calling was examined by subjecting pipped eggs to an incubation temperature that was either above (50.degree. C) or below (20.degree. C) normal in a surrogate incubation apparatus that automatically returned incubation temperature to near-normal levels for a brief 4-min period whenever an experimental embryo called in response to heating or cooling. Under these conditions, embryonic temperatures initially drifted about 2.degree. C from normal, then stabilized until the end of a 2-h experimental period. When a return to normal incubation temperature was controlled by calls of an embryo held in another room (yolked control), body temperature drifted erratically, and tended towards ambient, indicating that temperature regulation could not be achieved simply by random calling. Results show that late-stage pelican embryos are capable of vocal regulation of temperature provided a parent or surrogate responds appropriately to the embryo''s calls. Vocal regulation of embryonic temperature by calling to cooperative parents is potentially operative in a wide range of precocial and some altricial species of birds.