自然孵育下大紫胸鹦鹉生长发育的观察

Growth and Development of Psittacula derbiana (Fraser) under Natural Incubation Condition

对自然孵育条件下3只大紫胸鹦鹉的生长发育情况进行了观察与分析,表明大紫胸鹦鹉的平均出壳重为(13.80±2.79)g,60日龄平均体重为(265.33±39.03)g。体重与日龄的关系为W=8.55+5.61×D(0～50日龄);出壳时嘴峰短于嘴裂,45日龄时嘴峰长度超过嘴裂,60日龄时嘴峰嘴裂的平均长度分别为(27.00±1.00)mm和(24.00±0.87)mm。在育雏过程中,雏鸟的羽色变化明显。

Weight and body measurements of three chicks of Psittacula derbiana were taken five days. The average body weight of new hatch chicks is（ 13.80 ± 2.79） g. The average weight of 60 day old chicks is （265.33 ± 39. 03 ） g. The results indicate the relationship between weight and days is W = 8.55 ± 5.61 × D （0 -50 d）. The culmen is shorter than rictus of the new hatch, and the culmen is longer than rictus on the 45 days. The average length of culmen and rictus is （27.00± 1.00） mm and （24. 00 ±0. 87） mm on the 60 days, respectively. The feather color of these chicks changes distinctly during its growing process.