三道眉草鹀营巢成功率及其影响因素

Nesting Success and Influencing Factors in the Meadow Bunting( Emberiza cioides)

2012—2015年每年的4—7月份,在内蒙古扎鲁特旗地区对三道眉草鹀的窝卵数和营巢成功率进行了研究。结果表明:三道眉草鹀的平均窝卵数为(4.46±0.72)枚·巢^(-1)(n=47),平均孵卵期为(12.44±0.53)d(n=9),孵化率为0.52,Mayfield营巢成功率为0.22,直接观察法营巢成功率为0.34。三道眉草鹀营巢成功率的主要影响因素为天敌捕食和人为干扰,因此,应加强对西伯利亚山杏的保护和管理,制定合理的放牧政策以提高三道眉草鹀的营巢成功率。

We studied the clutch size and the nesting success of Meadow Bunting in Zhaluteqi Region of Inner Mongolia Munici- pality from April to July of 2012-2015. The average clutch size of Meadow Bunting was 4.46＋0.72 eggs （ n = 47）, average incubation period was 12.44_＋0.53 d （n=9）, incubated rate was 0.52, Mayfield＇ s nesting success was 0.22, and direct observational nesting success was 0.34. The two main factors influencing Meadow Bunting nesting success are predators and human disturbance. Therefore, we should strengthen the conservation and management of Siberia apricot （Prunus sibirica） and enact reasonable grazing policies to enhance the nesting success of Meadow Bunting.