REPRODUCTIVE BIOLOGY OF NILE TILAPIA, Oreochromis niloticus UNDER THE BRACKISH WATER CULTURE CONDITION, IRAN  

Nassrin Mashaii*(Nassrinmashaii@yahoo.com), Farhad Rajabipour, Mohamad Mohammadi, Habib Sarsangi, Ahmad Bitaraf, Homayun Hossein-Zadeh, Mostafa Sharif-Rohani
10KM Bafq-Yazd Road, National Research Center of Saline Water Aquatics, Bafq, Yazd, Iran, P.O.Box 159

Nile tilapia Oreochromis niloticus samples were stocked from September 2009 to January 2011. During the study period, water salinity, temperature, pH and oxygen saturate were fixed at 11.5ppt, 27±0.5°C, 7.6-8.1 and 100%, respectively. Fish were fed using 40% protein food under 18:6 (L:D) 2500lux light regime. Total length and weight of the spawners, absolute and relative fecundity, egg weight and diameter and spawning intervals were investigated. Pearson correlation coefficient between total length and weight of brooders against absolute and relative fecundity, wet weight of an egg, egg clutch and egg diameter were studied (p<0.005).

Key words: tilapia, reproduction, fecundity, egg diameter and weight, Iran

 

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