بررسي برخي از خصوصيات زيستي ماهي شوريده به منظور بهينه‌سازي فصل صيد در درياي عمان‌

Biological investigation of Tiger-toothed Croaker, Otolithes ruber, in Oman Sea along Sistan and Baluchistan Province

, , , During the years 2003-2004, biological aspects of Tiger-toothed Croaker, Otolithes ruber, was investigated in Oman Sea along Sistan and Baluchistan Province. Based on the frequency of developed maturity stages (IV,v), a prolonged spawning activity extending from August 10 March was determined for 0. ruber. The Gonadosomatic Index (GSI) suggests two peaks which a minor one in October and a major one in March-April. Comparison of Hepatosomalic Index (HI) and Condition Factor (Kn) with the spawning peak indicated a reverse relationship. According to length at first maturity (Lm50%== 40cm) data and exploitation of fish at lengths more than 40cm, the stretched optimum mesh size of nets was calculated at 100mm. Analysis of stomach food items , showed that fish group dominated the diet (80%), of which Anchovy accounted for 40% of the total frequency. We estimated the exploitation rate of the fish at E= 0.6. The length infinity (1