REPRODUCTIVE BIOLOGY OF BIGEYE TUNA IN THE EASTERN INDIAN OCEAN 1

Abstract

Reproductive biology of bigeye tuna in the Eastern Indian Ocean was conducted from January 2000 to August 2003 which collected the data from surface longline that unloaded their catch at Phuket fishing port, Thailand. Spawning season of female and male of BE found in December to January and June. The size at first maturity and age of female and male was reported 88.08, 1.97 years old and 86.85 cm, 1.92 years old. Monthly sex ratio varied (1:0.33 to 1:24),