CATCH ESTIMATION OF PELAGIC SHARKS BY CHINESE LONGLINE OBSERVER IN THE EASTERN PACIFIC OCEAN

his document provide some information of shark and ray bycatch in the tropical longline fishery targeting bigeye tunas. There are eleven species of shark and rays of the catch in the tropical Eastern Pacific Ocean. Blue shark is very abundant shark and discarded due to low economic value, The ratio of blue shark catch to bigeye tuna catch amounted to 0.52 in weight. The ratio of fin weight to round weight of blue shark is 5.35%, But as to white tip shark, ratio is 7.03%. The document also present total length distribution. Key words: Deep Longline fishery, Sharks, ratio of fins weight to body weight