A Comparative Study on Three Sampling Methods of Oncomelania hupensis
Science Discovery
Volume 5, Issue 4, August 2017, Pages: 270-275
Received: May 19, 2017; Published: May 20, 2017
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Authors
Shang Yidi, School of Geography and Environmental Sciences, Jiangxi Normal University, Nanchang City, China
Zhao An, School of Geography and Environmental Sciences, Jiangxi Normal University, Nanchang City, China; Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang City, China
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Abstract
The oncomelania hupensis snail is the unique host of schistosomiasis. Schistosomiasis is closely related to the spatial distribution of the snail. It is important to control schistosomiasis susceptible areas and eliminate oncomelania hupensis by optimizing, simplifying the snail sampling method, and obtaining the snail's statistics. A 50m × 50m experimental field was selected from the Chayegang marshland of Henghu farm in the Poyang Lake region, and the sampling frame (0.33m × 0.33m in size) used by the present schischtosomiasis control departments served as the basic sampling unit to conduct continuously push-broom survey of the snail. The count number of the snail, vegetation species, plant height and plant coverage were investigated. The average number of the snail were estimated under three assumed sampling scenarios: simple random sampling, systematic sampling and spatial stratified sampling. The results show that the relative errors of the average number in three sampling schemes are very close, 10.82%, 12.85% and 10.11% respectively, and the absolute errors are 0.310, 0.319 and 0.06 respectively, which demonstrate that the spatial stratified sampling has obvious advantages, its estimation accuracy of the snail can be improved remarkably.
Keywords
Oncomelania hupensis, Vegetation, Spatial Stratified Sampling, Comparative Study
To cite this article
Shang Yidi, Zhao An, A Comparative Study on Three Sampling Methods of Oncomelania hupensis, Science Discovery. Vol. 5, No. 4, 2017, pp. 270-275. doi: 10.11648/j.sd.20170504.15
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