青海湖裸鲤体腔寄生蠕虫群落研究
STUDIES ON THE CAVITY HELMINTH COMMUNITY OF GYMNOCYPRIS PRZEWALSKII PRZEWALSKII IN QINGHAI LAKE
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摘要: 青海湖裸鲤体腔为三种寄生蠕虫寄生,即裂头绦虫裂头蚴,舌状绦虫裂头蚴和对盲囊线虫的三期幼虫。这几种蠕虫在不同大小的青海湖裸鲤中数量差异很大。将其看作一个组分群落,并根据其发生数量进行模糊聚类和极点排序,结果将其分为二个亚组分群落,即体长小于150mm的青海湖裸鲤体腔蠕虫亚组分群落和体长大于150mm的个体的体腔蠕虫亚组分群落。这与宿主的行为和食性改变有密切关系。舌状绦虫与另两种蠕虫间有显著负协调关系。Abstract: The cavity of Gymnocypris przewalskii przewalskii is parasitized by three helminths, the plerocereoids of Ligula intestinalis and Diphyllothrium sp. and the third-Stage larvae of Contracaecum rudolphii The abundance of these helminths in diferent size of fish is different. By means of fuzzy cluster and pole ordination, the component community can be divided into tWo groups ie helminths in hosts less than 150 mm in body length and those in hosts more than 150 mm, which is related to the ecological conversion of the host with the growth. The negative assosiation between Ligula intestinalis and Diphyllobothrium sp. and between Ligula intestinalis and Contracaecum rudolphii are obvious.
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