山东部分地区小兽类寄生恙螨的群落结构

用鼠笼捕捉活鼠，收集体外恙螨，分类计数，定量分析小兽类体外寄生恙螨的群落结构。探讨山东小兽类体外寄生恙螨群落结构及其与疾病的关系。结果表明，当地5种小兽类体外共有6种寄生恙螨。黑线姬鼠、大仓鼠体外寄生螨种较丰富，各有5种寄生螨。小盾纤恙螨宿主范围广，在4种小兽的体外均有发现。大仓鼠体外太平洋无前恙螨的带螨率和带螨指数最高(72．73％、52．00)，临淮岗纤恙螨、泰山纤恙螨、须纤恙螨普遍寄生于黑线姬鼠、大仓鼠体外。黑线姬鼠与大仓鼠寄生螨群落多样性指数相对较高。黑线姬鼠寄生螨群落与大仓鼠的相似系数最大(39．2)。黑线姬鼠体外恙螨群落结构随季节变化而发生变化，恙螨群落的丰富度和多样性指数以冬季(12～2月)最低，春、秋季较高。

Community Structure of Chigger Mites Parasitic on Small Rodents and Insectivores in Shandong Province

Living rodents and insectivores were captured with rodent taps, the chigger mites out their bodies were numbered and identified to study the community structure of chigger mites from Shandong Province. A total 6 species of chigger mites were collected from 5 species of rodents and insectivores. The results show that Leptotrombidium scutellare parasitic on 4 species of hosts. Parasitic rate and the index of Walchia pacific on Cricetulus triton is the highest (72 73%, 52 00). L.linhuaikongense, L.palpale, L.taishanicum are commonly observed on Apodemus agrarius, C.triton. The diversity indexes of the communities of chigger mites on A.agrarius and C.triton is relatively higher, and the similar index between the two communities is the highest among the rodents. The diversity index of chigger mite's community on A.agrarius changes with the season. The community structure of chigger mites parasitic on various rodents is different, and changes with season.