Communities of gamasid mites on Eothenomys miletus in southwest China
Communities of gamasid mites on Eothenomys miletus in southwest China
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DOI：
10.1515/biolog-2015-0080
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发表时间：
2015-05
期刊：
影响因子：
1.5
通讯作者：
P. Peng;Xian-Guo Guo-Xian-Guo-Guo-2207510841;Wenyu Song;Peng Hou;Y. Zou;R. Fan;Xue He
中科院分区：
文献类型：
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作者：
P. Peng;Xian-Guo Guo-Xian-Guo-Guo-2207510841;Wenyu Song;Peng Hou;Y. Zou;R. Fan;Xue He
摘要云南红背田鼠是中国地区特有的特有野生啮齿动物。2001年至2013年，在中国西南地区的39个地点，共从2463只田鼠中采集到12,536只革螨。共检出螨类12,536只，隶属于9科26属106种。所有受检田鼠的总螨率和平均密度分别为48.36%和5.09只/只。中华乳叶螨(Cr值为81.24%)为优势种。革螨寄生常见，具有很高的物种多样性(S=10 6)。利用分散系数、聚集指数、Cassie指数、斑块度指数、平均拥挤度和负二项分布参数等指标分析了优势种的空间分布格局。建立的Iwao方程为M*=5.516+2.312M(r=0.942，P<；0.05)，α和β分别大于0和1(决定空间格局的边界值)，经F检验，F值为81.66(P<；0.05)。中华绒毛虫在各个体间的空间分布格局为聚集分布，表明中华绒毛虫在体表上有聚集分布的趋势，形成不同的个体群。种-丰度分布表明，随着革螨个体数的增加，革螨种类逐渐减少，说明大多数革螨种类为稀有种。种-样关系曲线趋势表明，革螨种类数随寄主样本数(米氏绒毛革螨个体数)的增加而增加。这些结果表明，在今后的鼠类革螨种类组成和物种多样性的现场调查中，建议采用大样本寄主。
Abstract The Yunnan red-backed vole (Eothenomys miletus) is an endemic and specific wild rodent species in China. From 39 sites across southwest China, a total of 12,536 individuals of gamasid mites were collected from 2,463 voles between 2001 and 2013. The 12,536 mites were identified as comprising 106 species, 26 genera and 9 families. The overall mite prevalence and mean abundance from all the voles were 48.36% and 5.09 mites/per examined vole, respectively. Laelaps chini (Cr = 81.24%) was the dominant mite species. The gamasid mite infestation of E. miletus is common with a very high species diversity (S = 106). The spatial distribution pattern of the dominant species (L. chini) was analyzed by using some indices, including the dispersion coefficient, aggregated indices, Cassie index, patchiness index, mean crowding and negative binomial distribution parameter. The established Iwao’s equation was M* = 5.516 + 2.312M (r = 0.942, P < 0.05) with higher α and β than 0 and 1 (the border values for determining spatial pattern), respectively, and the F value was 81.66 (P < 0.05) in the significance test of random deviation (F-test). The spatial distribution pattern of L. chini among the individuals of E. miletus was then determined as an aggregated distribution, which means that L. chini has a tendency to clump together and form different individual groups on the body surface of E. miletus. The distribution of species-abundance showed that with the increase of gamasid mite individuals, the number of the mite species gradually decreased, which indicates that most mite species are rare species. The curve tendency of species-sample relationship showed that the number of gamasid mite species increased with the increase of the host samples (number of individuals of E. miletus). The results suggest that a large host sample is recommended in the future field investigations for the species composition and species diversity of gamasid mites on rodents.