太原市南郊区喜鹊种群数量研究

喜鹊遍布于全国,分化为4个亚种。作者于1961～1990年连续30年,在太原市南郊对喜鹊的种群数量进行了研究。选定4条调查路线,采用数量统计法,表明种群数量相对稳定。以5年对种群数量比较,结果差异也不显著。但30年间种群数量呈不规则的波动。种群数季节消长规律以5月份最低,与自然死亡,天敌伤害和雌鸟卧巢关系密切。繁殖后比繁殖前的种群数量指数增长65.13%。影响喜鹊种群数量增长的因素是食物和气候。

The Kinds and Number of Magpies in the Suburbs of Taiyuan

Magpies which are divided into subspecies are widesprede around the country.The author,chosing 4 routes of observation and using the method of amount statistics,studied the amounts of Magpies species groups in the southen suburbs of Taiyuan city for 30 years in succession from 1961 to 1990.the results showed that the amounts of the species groups were relatively stable,the difference of the results was not marked comparing with the amounts of the species groups in 5 years but there were some of the irregular fluctuation during 30 years,the seasonal regular pattern of growth and decline of the species groups was the lowest in Meng and had a close relationship with natural death and the injury of natural enemy and incubation period of the female birds.The index of the amounts of the species groups before breeding had growed 65. 13% more than that after breeding.The factors which effected the growth of the amourts of the species groups were food and climate.