黄鼠洞干蚤和宿主密度的年间动态关系

THE YEARLY DYNAMICS RELATIONSHIP BETWEEN BURROW TRACK FLEA INDEX AND POPULATION OF CITELLUS DAURICUS

根据内蒙古自治区正镶白旗乌宁巴图苏木1981～1993年达乌尔黄鼠Citellusdauricus密度和洞干蚤指数监测资料进行分析，得到如下结果。共检桐干蚤9种，其中方形黄鼠蚤蒙古亚种Citellophilustesquorummongolicus（66．0％）为优势蚤种，光亮额蚤Frontopsyllaluculenta（23．6％）为次优势蚤种，阿巴盖新蚤Neopsyllaabagaitui和二齿新蚤N．bidentatiformis为常见种，余为少见种。鼠密度与洞干蚤指数关系显著（P＜0．03），关系为洞干蚤指数=0．2491＋0．0596鼠密度。洞干蚤指数和染蚤率关系不显著（0．05＜P＜0．10）。方形黄鼠蚤数量的高低显著地影响洞干蚤的多样性和均匀性。洞干蚤和体蚤指数的关系是显著的（P＜0．05），关系为洞干蚤指数＝0．2709＋0．0504体蚤指数。洞干蚤和巢蚤指数的关系是显著的（P＜0.07），关系为洞干蚤指数=0.27652＋0．00348巢蚤指数。三种蚤指数之间有如下近似关系：巢蚤指数：体蚤指数：洞干蚤指数=100：10：1。

According to the fluctuation of population of Citellus dauricus and its burrow track flea index in Wuningbatu Sumu, Zhengxiangbai Banner, Inner Mongolia Autonomous Region during 1981 ～ 1993, the authors have found that there are nine flea species with Citellophilus tesquorum mongolicus (66. 0 % ) as the most dominant member,and Frontopsylla luculenta (25. 0 % ) the second. Neopsylla abagaitui and N. bidentatiformis are only of common occurrence whereas the other species are rather scare. The correlation between the burrow host population and its burrow track flea index is significant (P<0. 03), i. e., burrow track flea index=0. 2491+0. 0596 host population. But the correlation between the burrow track flea index and its infecting flea rate is not significant (0. 05<P<0. 10), and the diversity and evenness of flea species are influenced significantly by the proportion of C. t. mongolicus in the flea population. Furthermore, the relationship between the burrow track flea index and body flea index is significant (P<0. 05 ), i. e., burrow track flea index = 0. 2709 + 0. 0504 body flea index, and that between the burrow track flea index and burrow nest flea index is also significant (P<0. 07), i.e., burrow track flea index= 0. 2765+0. 0035 burrow nest flea index. Finally, the correlation among the three kinds of flea index is approximately as following: (burrow nest flea index): (body flea index): (burrow track flea index) = 100: 10: 1.