Behavior Research Of Electroreception And Chemoreception And Sense Organs Structure Observation By SEM Of Chinese Sturgeon (Acipenser Sinensis Gray)

Chinese sturgeon(Acipenser Sinensis Gray) is an endangered aquatic wild animal that has been listed as categoryâ… in the China's national protected wild animal list. There is no conclusion that which sense plays a major role in feeding behavior. We have studied electroreception and chemoreception which work in the feeding Behavior of Chinese sturgeon by ethological method. The electrical sense reseach were designed five groups:No Oligochaete covered by plastic membrane,Live Oligochaete covered by plastic membrane,No Oligochaete covered by agarose membrane,Live Oligochaete covered by agarose membrane,Dead Oligochaete covered by agarose membrane. The chemical sense study were devised sixe groups:Normal Chinese sturgeon fed by water,Normal Chinese sturgeon fed by juice of chironomid larval,Barbel cuted Chinese sturgeon fed by water,Barbel cuted Chinese sturgeon fed by juice of chironomid larval,Barbel cuted and nostril jammed Chinese sturgeon fed by water,Barbel cuted and nostril jammed Chinese sturgeon fed by juice of chironomid larval. Also structure and distribution of Taste buds on upper(lower)lip's verge and wall were observed by Scanning electron microscope. The results showed that there was no significant difference in food suck frequency between No Oligochaete covered by plastic membrane group,Live Oligochaete covered by plastic membrane group and No Oligochaete covered by agarose membrane group, but these groups had marked distinction with Live Oligochaete covered by agarose membrane group (P<0.05); Three groups of Chinese sturgeon fed by juice of chironomid larval had noticeable diversity wih three groups of Chinese sturgeon fed by water (P<0.05), but there was no significant difference between Normal Chinese sturgeon fed by juice of chironomid larval group and Barbel cuted Chinese sturgeon fed by juice of chironomid larval group, however these two groups had conspicuous diversity with Barbel cuted and nostril jammed Chinese sturgeon fed by juice of chironomid larval group (P<0.05). There are much Taste buds that distributes over upperlip's verge and wall and lower lip's verge, but we did not find on lower lip's wall. For these reasons, it is may conclude that electroreception and chemoreception have fundamental contribution in feeding behavior of Chinese sturgeon.