青海湖裸鲤寄生对盲囊线虫的种群生态研究

被引:17
作者
杨廷宝
廖翔华
曾伯平
机构
[1] 中山大学生命科学院!广州
[2] 不详
[3] 湖南湘潭师范学院生物系
关键词
青海湖裸鲤; 对盲囊线虫; 种群平均密度; 空间格局;
D O I
暂无
中图分类号
Q959.17 [线虫动物门];
学科分类号
摘要
对盲囊线虫的三期幼虫寄生在青海湖裸鲤的体腔,以扁平的透明薄囊包被,附于肠壁和肠系膜间,其种群平均密度随宿主体长的增加呈指数形式增加,寄生虫种群在宿主种群中呈聚集分布,且其聚集强度随寄生虫的种群平均密度增加而增加。这种分布形式与其第一中间宿主锯缘真剑水蚤在青海湖中分布的不均匀性和鱼类宿主在生长过程中的食性分化有关。具体机制无法用数学模式描述,感染率的显著增加引起分布的聚集强度降低。
引用
收藏
页码:213 / 218
页数:6
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