Effect of salinity on growth and survival of Nile tilapia fry (Oreochromis niloticus)

Subject Areas : Breeding and Aquaculture Sciences Journal

Habib Sarsangi Aliabad ¹ , Mohammad Mohammadi ² , Nasrin Moshaei ³ , Farhad Rajabi ⁴

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Received: 2017-05-02 Accepted : 2017-05-02 Published : 2017-05-02

Keywords: growth, Salinity, Survival, Oreochromis niloticus, fry,

Abstract :

A study conducted to evaluate the effect of salinity on growth and survival rate of Nile tilapia fry by using sea salt to make six salinity levels (0, 4, 8, 12, 16 and 20 ppt) with three replicates. Fry kept in 18 plastic containers (8 litter capacity) and had the central aeriation. Fry fed on rainbow trout food five times per day during the light period. Results showed  that some growth indices such as average of final body weight, daily growth rate, specific growth rate and survival rate increased by increasing salinity levels up to 8 ppt significantly, and then decreased by increasing salinity levels up to 20 ppt. according to the experiment, it seems that larviculture of Nile tilapia in brackish water is available and the best results achives at 8 ppt. considering the results of growth and survival rate at 16 ppt showed that   Salinity up to 16 ppt was tolerable, although reduced the growth and survival of Nile tilapia fry.