Distribution of univalvia molluscs in area with natural decline of Oncomela-nia hupensis snails in Eastern Dongting Lake area
- VernacularTitle:东洞庭湖钉螺自然消亡地区单壳类软体动物分布调查
- Author:
Linhan LI
;
Yibiao ZHOU
;
Shengbang ZHENG
;
Jinyi WU
;
Xiuxia SONG
;
Zhong HE
;
Jiabian YOU
;
Bin CAI
;
Genming ZHAO
;
Qingwu JIANG
- Publication Type:Journal Article
- Keywords:
Oncomelania hupensis;
Natural extinction;
Schistosomiasis;
Univalvia Mollusc;
Distribution;
Eastern Dongting Lake
- From:
Chinese Journal of Schistosomiasis Control
2014;(1):22-26,31
- CountryChina
- Language:Chinese
-
Abstract:
Objective To understand the distribution of univalvia molluscs in Eastern Dongting lake area where the Oncome-lania hupensis is extinct,so as to explore the causes of extinction and to provide the evidence for formulating schistosomiasis con-trol strategy. Methods The univalvia molluscs of the Qianliang Lake district,Jianxin District and Junshan Park were investigat-ed in August of 2013. All the collected snails were classified and identified. The data were analyzed by using the method of Shapiro-Wilk normality test and non-parametric test. The ecological biodiversity differences from each district were compared by the biodi-versity indexes. Results The univalvia molluscs collected were from 6 species in 3 families in Gastropoda class,namely Oncome-lania hupensis Gredler in Pomatiopsidae family,Parafossarulus striatulus,Alocinma longicornis,Parafossarulus sinensis,Bithynia fuchsisana in Bithyniidae family,and one genus provisionally named Radix in Lymaneidae family. In Junshan Park ,a total of 4 553 snails were collected,among which 1 264 were Oncomelania snails. In Jianxin District,336 univalvia molluscs were collect-ed,and no Oncomelania snails were found. In Qianliang Lake district,there were only 7 Alocinma longicornis snails,2 Parafossa-rulus sinensis snails and 1 Parafossarulus striatulus snail collected. There were significant differences among the distributions of the samples from the three districts(χ2=166.225,P<0.01).The Simpson’s diversity indexes in Qianliang Lake area,Jianxin Dis- trict and Junshan Park were 0.402 8,0.718 6 and 0.678 8,respectively,and the Shannon-Wiener indexes of the 3 areas were 0.721 5,1.431 3 and 1.199 9,respectively. Conclusions With the extinction of Oncomelania snails,the species and quanti-ties of other snails become rare in Qianliang Lake area. Whether their causes are relevant is worth further studying.
