尾鳃

以寄生在每尾鱼鳃上的钩介幼虫的数量为基础，分析了钩介幼虫寄生密度与寄生时间对宿主鱼鳃上寄生数量的影响；

On the basis of the parasitic number of glochidia in every host-fish 's gills , we analyzed how the parasitic densities and parasitic times affected the glochidia 's parasitic number in the host-fish 's gills ;

大鲵（Andriasdavidianus）俗称娃娃鱼，属两栖类，有尾目，隐鳃鲵科，是国家二级保护动物和世界上最大的珍稀两栖动物。

Andrias davidianus is the biggest amphibian in the world .

中国大鲵（Andriasdavidianus）属于国家二级保护动物，已被列入《濒危野生动植物国际贸易公约》即CITES公约附录Ⅰ中，属于两栖纲、有尾目、隐鳃鲵科。

Chinese giant salamander ( Andrias davidianus ) belongs to a national second class protected animal which has been listed in the Convention on International Trade in Endangered Species of Wild Fauna and Flora ( CITES ) in Appendix I , it belongs to the Amphibia , Caudata , Cryptobranchidae .