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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Your Position :Home->Past Journals Catalog->2020 Vol.39 No.5

A Preliminary Report on Walchia micropelta in Yunnan Province
Author of the article:DING Fan#, JIANG Wenli#, GUO Xianguo*, FAN Rong, MAO Keyu, ZHAO Chengfu, ZHANG Zhiwei, QIAN Tijun, YANG Zhihua
Author's Workplace:Vector Laboratory, Institute of Pathogens and Vectors, Dali University, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali, Yunnan Province 671000, China
Key Words:chigger mite; Walchia micropelta; distribution pattern; ecology; Yunnan
Abstract:To investigate the infestation and distribution of Walchia micropelta, field survey was conducted in 33 counties of Yunnan Province from 2001 to 2015. The constituent ratio, prevalence, mean abundance and mean intensity were used to analyze the infestations of W. micropelta in different landscapes, habitats, regions and altitudes. Disperse coefficient, I index, patchiness index and Cassie's index were used to analyze the spatial distribution patterns of W. micropelta. Additionally, association coefficient was used to measure the interspecific relationship of W. micropelta with W. koi. A total of 4 014 W. micropelta (accounting for 3.15% of the total) was collected from 20 host species in 22 investigation sites, and most of them were collected in the southern of Yunnan Province. The low altitude areas, mountainous landscapes and outdoor habitats had more abundant numbers of W. micropelta. Adult hosts had significantly higher constituent ratio, prevalence and mean abundance of W. micropelta than the juvenile hosts (P<0.05). Furthermore, there was a positive association between the colonization of W. micropelta and W. koi on Rattus tanezumi body surface (V=0.12, P<0.05). Therefore, it is concluded that W. micropelta is widely distributed in Yunnan Province with low host specificity and aggregate distribution on rodents. The infestations of W. micropelta can be affected by many factors, such as regions, altitudes, and the species and age of hosts.
2020,39(5): 555-562 收稿日期:2020-04-16
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