关键词: 蜱螨亚纲, 医学革螨, 生态学, 云南

Abstract:

　　【Abstract】　Objective　To study the distribution and its ecological charateristics of medical gamasid mites in the surrounding areas of Biluoxueshan in Yunnan province, China. Methods　Some small mammals were captured by mouse traps (or mouse clips) in the surrounding areas of Biluo snow mountain located in Weixi county of Yunnan province. The ectoparasitic gamasid mites were all collected from the body surface of small mammal hosts. The community structure of gamasid mites were illustrated with richness （S）, Shannon?Wiener’s diversity index（H′）, evenness（J′） and dominance index（C′）. The spatial distribution patterns of some dominant species of gamasid mites were measured by disperse coefficient, clumping index, Cassie index and patch index. Results　There were 1560 small mammals belonging to 40 species captured, and 35 species of gamasid mites were collected from the body of small mammals. Of which, 8 species were not identified. The community of gamasid mites showed a high diversity with abundant species. The dominant species of gamasid mite were Laclaps traubi, Laelaps chin, Laelaps jingdongensis, Laclaps turkestanicus and Ornithonyssus bacoti. The distribution patterns of 5 dominant gamasid mite species on the body of small mammals were of aggregated distribution. Of the 5 dominant species, the female ratios of most mite species （96.84%, 87.94%, 92.78%, 95.77%） were much higher than the males, but Os.bacoti was an exception （37.25%）. For most mites species, the proportion of the larvae and nympha was much lower with the exception of Os.bacoti Hirst （54.51%）. Conclusion　The community of gamasid mites in the surrounding areas of Biluo snow mountain was relatively complicated with abundant species. The spatial distribution of dominant mite species was of aggregated distribution pattern.

Key words: Acai, Medical gamasid mite, Ecology, Yunnan