Preliminary study on the diffusion dynamics characteristics of Biomphalaria straminea in Southern China
10.3969/j.issn.1006-2483.2020.05.001
- VernacularTitle:我国华南地区藁杆双脐螺扩散动力学特性初步研究
- Author:
Fengyang MIN
1
,
2
,
3
,
4
,
5
,
6
,
7
;
Shizhu LI
1
,
2
,
3
,
4
,
5
;
Jiasheng WANG
6
;
Yunhai GUO
1
,
2
,
3
,
4
,
5
;
Kongxian ZHU
6
;
Yunchao ZHANG
6
Author Information
1. National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention
2. Chinese Center for Tropical Diseases Research
3. WHO Collaborating Centre for Tropical Diseases
4. National Center for International Research on Tropical Diseases, Ministry of Science and Technology
5. Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
6. Changjiang River Scientific Research Institute，Wuhan, Hubei 430010，China
7. College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei 430070, China
- Publication Type:Journal Article
- Keywords:
Biomphalaria straminea;
Water flow;
Diffusion;
Drift;
Guanlan Rive;
Longgang River
- From:
Journal of Public Health and Preventive Medicine
2020;31(5):1-5
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the dynamic diffusion characteristics of Biomphalaria straminea in Shenzhen, Dongguan and Huizhou of Southern China. Methods B. straminea was monitored at 25 investigation points along 10 river channels in Shenzhen, Dongguan and Huizhou by salvaging method. The diffusion characteristics of snails along with water in the Guihua New Village section of the Guanlan River and the Dawei Village section of the Longgang River were analyzed by GPS location drift test. In addition, the influence of flooding on the diffusion of B. straminea in the Kuichong River both before and after Typhoon "Shanzhu" was analyzed by monitoring the hydrology and distribution of snails. Results In March and October from 2016 to 2018, a total of 1 176 kg of floating objects were salvaged in rivers in Shenzhen, Dongguan and Huizhou. Scattered B. straminea were found on water hyacinths. Drift test of floats with GPS showed that the average drift speed of GPS floating objects was close to the river surface velocity. Affected by river current and wind direction, the GPS floats quickly drifted to the river bank and stopped in the stagnant area due to the blockade of water plants, stone and the bending of the shoreline. The drift distance of each time was between 136 - 715m. The test results of salvaged floating objects found that the loss rates of B. straminea were 46.70% - 60.00% and 22.10% - 30.80%, in the Guihua New Village section of the Guanlan River and the Dawei Village section of the Longgang River, respectively, which were significantly affected by the floating weight, river velocity and drifting distance. The analysis of the hydrology and distribution of B. straminea in the Kuichong River both before and after Typhoon "Shanzhu" showed that the density of B. straminea in the river was significantly reduced by the flood. Conclusion B. straminea is mainly transported as suspended matter in water body, and flooding was an important factor in its long-distance diffusion.
