早成鸟
- 网络precocial bird
早成鸟-
雏鸟为早成鸟，出壳后12h内即随亲鸟离巢。
The young are precocial , and after being hatched they leave the nest with their parents within 12 hours .
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雏鸟在20日龄后体温维持在38.9±0.52℃，恒温能力晚于早成鸟。
The body temperature of nestling maintained at 38.9 ± 0.52 ° C after 20 days old .
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胚胎发育在第12孵化日龄到第15孵化日龄期间生长最快，生产单位重量的耗能最少，此期间虽是早成鸟胚胎低耗氧率时期，但又是快速生长的时期。
Embryonic growth was the fastest and growing same mass consumed tha lest energy during from the 12th to the 15th day .