新疆木垒波斑鸨营巢成功率的初步研究

A Preliminary Study on the Nesting Success in Houbara Bustard ( Chlamydotis undulata macqueenii) Population in Mulei Xinjiang

1998年 4月中旬～ 7月中旬 ,对分布于新疆木垒的波斑鸨 (Chlamydotisundulatamacqueenii)种群的营巢成功率进行了初步考察与研究。考察中共发现 16个巢、2 5窝幼雏。每巢产卵 3～ 6枚 ,卵鲜重 (6 4 7± 5 8)g ,卵径为 6 0 9mm× 43 9mm。产卵有两个高峰期 ,表明雌鸟第 1次繁殖失败后可再次产卵。第 1产卵期的巢卵数为(4 1± 0 8)枚 ,第 2产卵期的巢卵数为 (3 5± 0 6 )枚。雌鸟营巢成功率为 77 5 %～ 87 5 % ,卵的孵化率为83 6 %。每窝内从破壳到具备飞行能力的幼雏数基本不变 。

Nesting success of Houbara Bustard ( Chlamydotis undulata macqueenii ) was studied in Mulei,Xinjiang from April to June,1998. A total of 16 nests and 25 broods were found. A bimodal distribution of laying dates suggested the existence of a replacement clutch. 3 to 6 eggs were laid with the fresh weight of (64 7±5 8)g and the size of 60 9?mm×43 9?mm.The clutch size was (4 1±0 8) for the first clutch cohort and (3 5±0 6) for the second clutch cohort. The nesting success was 87 5%. The hatchability was 83 6%. Brood size keep the same within broods between hatching and fledging. This suggested that some females were very good at bringing their chicks to fledging.