The DNA contents from rainbow trout(Oncorhynchus mykiss),amur sturgeon(Acipenser schrensch) and blunt snout bream(Megalobrama amblycephala )were 3.47,11.73 and 2.66pg/N.

• 虹鳟、鲟和团头鲂的DNA含量分别为3.；47、11