虎纹伯劳的巢生境选择与繁殖行为

Nest-building and Breeding Behavior of Tiger Shrike (Lanius tigrinus)

2005年3-7月通过焦点动物取样法（focal animal sampling）和完全记录法（all-occurrence recording）对四川南充地区虎纹伯劳的繁殖行为进行了研究。结果表明，虎纹伯劳喜在5～12m的高大阔叶乔木的冠部分叉处营巢。对15个巢址主成分分析表明，前5个主成分特征值均大于1，累积贡献率高达83．15％，说明前5个主成分已经基本包含了所有参数的总信息量。4月下旬开始陆续有虎纹伯劳迁到，初到时并未配对。5月上旬开始出现求偶行为，并伴有递食行为。5月中旬首次见到营巢，两性参与营巢，营巢期5～7d。营巢结束一两天后开始产卵，一天一枚，窝卵数4～6枚。营巢期和产卵期都有求偶和交配行为。产完最后1枚卵后即开始由雌鸟单独孵卵，孵卵期13～14d。两性育雏，育雏期13～15d。

The breeding behavior of the tiger shrike was studied with the methods of focal animal sampling and all-occurrence recording in Nanchong, Sichuan during March to July 2005. The results showed that all studied nest sites were built on crunches closed to the canopy of trees with height between 5-12 meters. According to the principal component analysis for 15 nest＇s sites, the characteristic values of first five principal components were greater than 1 and the cumulative percentage reaches 83.15 % indicating that the five principal components contained the total information of all the 14 parameters. The tiger shrikes immigrated to Nanchong one by one from later April but they didn＇t pair. The first courtship with feeding we watched was in early May. The first nest-building was found in the middle of May. The nest was constructed by parents birds. The nest-building period lasted about 5-7 days. Tiger shrike laid one egg each day after the nest had been constructed one or two days later. The mean clutch was 4-6. Courtship and mating behavior existed during the period of nest-building and laying. It began incubation after the last egg has been laid. The incubation period was about 13-14 days. The nesdings were bred by parents birds. The breeding period was about 13-15 days.