Study of Big eye snapper (Lutjanus lutjanus) reproduction in Persian Gulf waters and Oman Sea

Study of behavioral and biological characteristics of each fish can be used for Proliferation, breeding industry, maintaining, and restocking. Study reproduction in Lujanus lutjanus was conducted in the Persian Gulf and Sea of Oman from December 2014 to November 2015. Sampling was conducted at 14 stations using trawl and trap monthly. In this study, the total number of samples was 247, which were 133 females, 97 males and 17 immature and the ratio of female to male was 1.37. Measuring of samples such as length (total, fork) and weight were taken. Minimum and maximum length of fish during different months was between 13 and 26 cm. Length-weight relationship was indicated Y = 0.002X 2.966, therefore, the fish had an isometric growth.Maximum and Minimum absolute fecundity were 102841 and 9870 eggs in May and November respectively. Maximum and Minimum relative fecundity were 581.02 and 73.69 eggs per gram in May and November respectively. Monthly average of GSI calculated 1.185. Maximum and Minimum of GSI were 2.304 and 0.474 in June and October 2014 respectively. Size maturity (Lm50) was 17.5 cm.