栗斑腹鹀双亲递食率比较研究

Comparative studies of parental feeding rates in Jankowski's Bunting (Emberiza jankowskii)

2012—2013年4—7月,在内蒙古通辽市扎鲁特旗对栗斑腹鹀育雏期双亲递食行为进行了研究.结果表明:栗斑腹鹀双亲均参与育雏,雌鸟和雄鸟递食率没有显著差异;亲鸟每天不同时间段递食次数无显著差异;雌鸟和雄鸟递食频次随着雏鸟日龄增大而显著增加.雏鸟4日龄以前,雄性递食次数高于雌性;雏鸟4日龄以后,雌性递食次数高于雄性.这种递食行为的性别间差异与雌雄分工有关;除递食以外,暖雏、为雏鸟遮阳等行为由雌鸟承担,而领域防御和警戒等行为由雄鸟承担.

Abstract： The parental feeding behaviors of Jankowski＇s Bunting （Emberiza jankowskii ） during the nestling period were studied at Zhaluteqi of Tongliao in Inner Mongolia Province from April to July during 2012--2013. The results indicated that the nestlings of Jankowski＇s Bunting were provisioned by two parents and there was no significant difference in the feeding rates between male and female. No significant difference was observed in the feeding frequency of parents at different time intervals of a day. Female and male feeding rates increased significantly with the nestling age. The provisioning rates of male was higher than that of female before 4 days of nestling＇s age,while the provisioning rate of male was lower than that of females afer 4 days of nestling＇s age. The difference in feeding behavior between female and male can be related to the sexual division of labor. Except for feeding offspring, females were exclusively in charge of warming and sheltering nestlings from strong sunlight, while males were exclusively in charge of alerting and field defense.