To study the biochemical basis of excessive lipid accumulation in the hepatopancreas of grass carp.ATP,ADP andAMP in hepatopancreas with different lipid content(3%-4%,7%-8%,11%-12%,15%-16%,respectively)were detected by high pressure liquid chromatograph.Hepatopancreas ultrastructures as well as the anti-oxidant capacity of serum were also studied by electron microscopic and conventional chemical methods,respectively.Results indicated that both ATP and energy charge decreased with the increase of hepatopancreas lipid accumulation.Though,sign...