Annual investigation of ecology and biology reproduction in Talal fish, female genus (rastrelliger kanagurta) in Iran southern Coast

Talal fish with generic name "Rastrelliger Kanagurta" is one of the osseous(bony) fishes and also the valuable species in the entire world. Since no studying hadnt been carried out on this fish in iran,in framework of above study, in Iran southern Coasts, the female genus this fish Macroscopic and biometric is investigated. In the annual cycle from (Tir 87-Khordad 88) In each month, 50 fishes Randomly collected (selected) from Persian gulf and oman sea, then We calculated climate thermal and salinity. In female fishes, length and total weight and also liver and ovary weight is measured. GSI and HSI calculated for determination of spawning and vitellogenesis season. Also, figures based on relationship (fish Length and fish weight) and fish weight and ovary weight was drawn. Discussion and HSI and GSI peak in talal fish was from (Tir87 – khordad 88) In temp of 29 centigrade and 37 ppt salinity in ordibehesht, that indicates spawning and vitellogenesis season in spring. Ovary type is possible batch spawner and, fish growth this is isometric. We hope theat this research results, more productivily creat in duplication and breeding the fish by accompanied.