Spatiotemporal distribution characteristics of the density and ectoparasitic fleas of <i>Spermophilus dauricus</i> in Xilin Gol League， Inner Mongolia Autonomous Region， China， 2012-2021

GUO Chen-ran, HAN Xiao, LIU Yu-qiu, REN Jia-rong, WANG Xiao-xu, CHANG Nan, JI Hao-qiang, WANG Zi-hao, LIU Qi-yong

doi:10.11853/j.issn.1003.8280.2025.02.013

Chinese Journal of Vector Biology and Control >

2025 , Vol. 36 >Issue 2: 215 - 225

DOI: https://doi.org/10.11853/j.issn.1003.8280.2025.02.013

Spatiotemporal distribution characteristics of the density and ectoparasitic fleas of Spermophilus dauricus in Xilin Gol League， Inner Mongolia Autonomous Region， China， 2012-2021

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1. School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, China;
2. National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Department of Vector Biology and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Vector Surveillance and Management, Beijing 102206, China;
3. Department of Vector Control, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China

Received date: 2024-11-25

Online published: 2025-05-09

Supported by

National Natural Science Foundation of China (No. 32090023); Vector Surveillance and Control Project (No. 102393220020020000012)

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Abstract

Objective To describe and analyze the spatiotemporal distribution characteristics of the density, major ectoparasitic fleas, and flea community diversity of Spermophilus dauricus in Xilin Gol League, Inner Mongolia Autonomous Region, China, so as to provide a reference for plague prevention and control. Methods Data on the density and ectoparasitic flea infection of S. dauricus from 2012 to 2021 in Xilin Gol League were collected. The diversity of ectoparasitic flea community was calculated. Temporal distribution was analyzed using the Mann-Kendall trend test and seasonal decomposition of time series (STL). The spatial distributions of rodent density and flea infestation across different natural plague foci were described. The Kruskal-Wallis H rank-sum test was used to compare the differences in spatial distribution. Results The average density of S. dauricus in Xilin Gol League between 2012 and 2021 was 1.29 inds/hm². The flea infestation rate was 61.51%, the ten-year total flea index was 3.43, the Simpson's dominance index (D) was 0.36, and the Shannon-Wiener diversity index (H′) was 0.76. The dominant ectoparasitic flea species of S. dauricus was Citellophilus tesquorum. The Mann-Kendall trend test indicated significant decreases in rodent density, total flea index, C. tesquorum flea index, and Neopsylla abagaitui flea index (all Z<0, P<0.05). STL revealed seasonality in rodent density and ectoparasitic flea infestation. Kruskal-Wallis H rank-sum test showed statistically significant differences in the distribution of rodent density and ectoparasitic flea infestation among the natural plague foci of Lasiopodomys brandtii, the overlapping, and non-overlapping areas of the natural plague foci of S. dauricus and Meriones unguiculatus (all P<0.001), with the exception of other flea indexes. Conclusions In 2012-2021, rodent density was relatively high in the natural plague foci of S. dauricus and M. unguiculatus, and the burden of flea infestation was relatively high in the natural plague foci of L. brandtii and M. unguiculatus. It is necessary to strengthen the surveillance and control of S. dauricus and its ectoparasitic fleas based on the specific conditions of surveillance sites.

Key words： Spermophilus dauricus; Rodent density; Rodent flea index; Biodiversity; Natural plague focus

Cite this article

GUO Chen-ran, HAN Xiao, LIU Yu-qiu, REN Jia-rong, WANG Xiao-xu, CHANG Nan, JI Hao-qiang, WANG Zi-hao, LIU Qi-yong . Spatiotemporal distribution characteristics of the density and ectoparasitic fleas of Spermophilus dauricus in Xilin Gol League， Inner Mongolia Autonomous Region， China， 2012-2021[J]. Chinese Journal of Vector Biology and Control, 2025 , 36(2) : 215 -225 . DOI: 10.11853/j.issn.1003.8280.2025.02.013

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