黄胸鼠体表长形病蚤的数量变动

The Variation of the Population Density of Nosopsyllus elongatus elongatus on Rattus flavipectus

本文汇集了1983～1994年云南保山市坝区的调查资料，对长形病蚤指名亚种的数量变动进行分析。结果表明：长形病蚤多分布在海拔1650米的保山坝区，在海拔1000米以下的盈江县和梁河县的热坝区则稀少。在连续48个月总蚤指数和长形病蚤指数的季节变化图中显示每年春季一次的（2～5月）单峰型；与总蚤指数的春、秋两季双峰型明显不同。12年（年均8～12个月）的年际变动图显示：长形病蚤指数与总蚤指数相比波动性较大。

The variation of the population density of N. e. elongatus was studied with the investigateddata which belonged to Baoshan town from l983 to 1994. The result showed N. e. elongatus assembled in thearea of Baoshan town at the altitude of 1 650 m above sea level , but it was a few in the Yingjiang and Lianghecounties of the tropics below altitude 1000 m above sea level. It showed one peak from February to May andthe total flea index was clifferent for there were two peaks of tendency figures in Spring and Autumn everyyear in the continual 48 months. The interannul fluctuation curves showed that the inclex of N. e. elongatuswas stable, but campareci with the total flea index . it's fluctuation was larger in the continual 12 years (average 8~ 12 months every year ).