云南省齐氏姬鼠体表相关甲胁虱(虱目:甲胁虱科)的空间分布格局(摘要)

目的判定相关甲胁虱在齐氏姬鼠不同个体间的空间分布格局,揭示体表寄生吸虱在其鼠类宿主不同个体间的分布状况.方法本文应用Iwao直线回归方法及其随机偏离度检验对相关甲胁虱在齐氏姬鼠不同个体间的空间分布格局进行了研究. 结果相关甲胁虱是云南省境内齐氏姬鼠体表的主要寄生吸虱之一,分布比较广泛.按照Iwao方法所建立的回归方程为M*=3.10 6.69M(r=0.67,P<0.05),所得到的α与β值(α=3.10;β=6.69)均明显高于判定界线值0和1.对α与β值进行随机偏离度检验,F值为8.77(F>F0.05(2,6), P<0.05),由此判定相关甲胁虱在齐氏姬鼠不同个体间的空间分布格局为聚集型分布. 结论相关甲胁虱在齐氏姬鼠的寄生是不均匀的,而存在聚集现象,有形成大小不一吸虱个体群的趋势.

Spatial Distribution Pattern of Hoplopleura affinis (Anoplura: Hoplopleuridae) on Its Rat Host, Apodemus chevrieri in Yunnan, China

Objective To determine the spatial pattern of Hoplopleura affinis among the individuals of its dominant rat host, Apodemus chevrieri and to illustrate how the ectoparasitic sucking louse individuals distribute among their rat host individuals. Methods Iwao's linear regression method and a significance test of random deviation were used to analyze the spatial distribution pattern of Hoplopleura affinis among the individuals of Apodemus chevrieri. Results Hoplopleura affinis is a common sucking louse species on the body surface of Apodemus chevrieri, a common wild rat species in Yunan Province of China. In the light of Iwao's method, the equation for Hoplopleura affinis is M*=3.10 + 6.69M (r=0.67, P<0.05). Both α and β in the equation (α= 3.10, β=6.69) are higher than 0 and 1, the border values for determining spatial pattern of populations. The F values is 8.77(F>F0.05(2,6), P<0.05) in the significance test of random. The spatial pattern of Hoplopleura affinis among the individuals of its dominant host (Apodemus chevrieri) is of aggregated distribution. Conclusions The result suggests that the individuals of Hoplopleura affinis do not evenly distribute among its rat host individuals, but have a tendency to gather together and form different individual louse groups on the body surface of the rat host.