摘要
３种不同巢型雏鸟大约在雏期的５０％开始出现调温机制。从变温到恒温的转变期呈现出两种发育趋势：黄嘴朱顶雀发育迅速，角百灵和褐背拟地鸦发育缓慢。３种雏鸟产热量都随试验温度降低和日龄的增长而增加。但角百灵在３５℃时，产热量不随日龄增长而变化。
The study was conducted at Haibei Research Station of Alpine Meadow Ecosystem,Academia Sinica, during breeding seasons of 1987-1989. The development of themoregulation during the nestling period in three species were examined. The three species have different type-nest. They are Houned Lark (Eremophila alpestris) nesting on ground and open, Twite (Acanthis flavirostris) nesting in shrub and open, and Hum's Ground Jay (Pseudopodoces humilis) nesting in burrow and close. There were two developmental; modes in the process of a striking transition from an essentially poiklotheimic condition to a state of homeotherniy during the nestling period in three nestling species. The Twite was sharp mode, whereas the Hounded Lark and Hum's Ground Jay were gradual mode.There was a optimun growth temperature in Houned Larkes at 35℃ that at which temperature the metabolism rates of nestlings during the developmental period did not vary with age increasing.
基金
国家自然科学基金
中国科学院海北定位站基金
关键词
高寒草甸
雀形目
雏鸟
热调节
Alpine meadow, Passerines, Nestling, Thermoregulation
