branchiostegal，branchiostegite,flap,gill cover

The annuli on scale,opercular,dorsal fin spine,vertebra and cleithrum of Tor(Folifer) Brevifilis Brevifilis Peter were observed carefully and also the age of the species was diagnosed on the basis of 316 specimens collected respectively from the Qingshui River and the Duliu River in Guizhou,China.

根据分别采集于贵州清水江和都柳江的316例瓣结鱼标本,观察了瓣结鱼鳞片、主鳃盖骨、背鳍条、脊椎骨和匙骨等5种材料的年轮特征并进行了瓣结鱼的年龄鉴定。

Effects of Cu~(2+) and Zn~(2+) on opercular movement in Tilapia sp.;

Cu~(2+)、Zn~(2+)对罗非鱼鳃盖运动的影响