摘要
在中国大陆血吸虫病流行的7个省中,采集不同环境类型的21个湖北钉螺(Oncomelania hupensis)种群,每个种群各测量60只湖北钉螺的11个形态性状。采用形态性状的变异系数、种群内个体间的欧氏距离与多样性指数及主成分分析3种方法,分析不同湖北钉螺种群内形态性状的变异程度。结果表明,在种群内个体间的欧氏距离和形态性状多样性方面,都以江西都昌的变异最大,平均欧氏距离为2.88,方差为2.33,极差为9.05,多样性指数为1.56,个体间平均距离以四川西昌湖北钉螺种群的最小,仅为1.37,而多样性指数以四川丹棱湖北钉螺种群的最小,为0.91。在不同光壳湖北钉螺种群中,以云南大理湖北钉螺个体间的平均距离最大,为1.90,但方差和极差以江苏宜兴的最大,分别为0.55和4.46。不同湖北钉螺种群内形态性状变异程度存在较大的差异,肋壳湖北钉螺种群内的形态性状变异程度普遍高于光壳湖北钉螺种群内的变异程度。
21 Oncomelania hupensis populations were collected from the different environment types of seven provinces with Schistosomiasis japonicum in mainland of China. Sixty individuals were sampled randomly for each snail population and 11 morphological traits were measured for each snail. The coefficient of variation of morphological characters, Euclidean distances between snail individuals within a population, Morphological polymorphism and Principal components analysis were conducted to analyze the variation of morphological trait within snail population. Among 21 snail populations, the morphological variation of the snail population from Duchang, Jiangxi Province was the most, and the median,variance and range of its Euclidean distance and its Shannon-Winer index were 2.88,2.33,9.05 and 1.56 respectively. The median of Euclidean distance of the snail population from Xichang, Sichuan Province was the least （1.37） ,but the Shannon＋Winer index of the population from Danling, Sichuan Province was the least （0.91）. Among smooth-shell populations, the median of Euclidean distance of the snail population from Dali, Yunnan Province was the most （1.90）, but the variance and range of Euclidean distance of the snail population from Yixing, Jiangsu Province were the most （0.55 and 4.46 respectively） .There was the different degree of morphological variation within different snail populations, and the degree of morphological variation within rlbbed-shell snail populations was higher than that of within smoothed-shell snail populations.
出处
《动物学杂志》
CAS
CSCD
北大核心
2005年第5期77-83,共7页
Chinese Journal of Zoology
基金
"十五"国家科技攻关课题(No.2004BA718B04)
关键词
湖北钉螺
形态性状
变异
Oncomelania hupensis
Morphological trait
Diversity
作者简介
周艺彪，博士；主要研究方向：钉螺分类和血吸虫病流行病学．E-mail：zhouyibiao@tom．com。
