Adaptation, growth and survival of tilapia (Oreochromis niloticus) in Bafgh brackish water

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Abstract

An experiment was conducted to evaluate the possibility of adaptation, growth and
survival of Nile tilapia (Oreochromis niloticus) with 0.3g initial weight and red tilapia
(Oreochromis sp.) with 0.7g initial weight in underground brackish water. Fry of Nile tilapia
and red tilapia imported from Indonesia and after passing larviculture (25g) were examined
separately in fiber glass tank by two replicate. Fish were fed at a restricted feeding program
according to standard table during the light period. The results showed that some growth
factors such as final weight, final length, daily growth rate, specific growth rate and weight
gain in Nile tilapia were slightly higher than red tilapia but other factors such as survival and
feed conversion rate in red tilapia were slightly higher than Nile tilapia. There were no
significantly differences at 99% level among these factors. Length-weight relationship
equation was w = 0.012×TL3.189 in Nile tilapia and w = 0.014×TL3.119 in red tilapia (r2 = 0.99),
b value were 3.189 and 3.119 respectively in Nile and red tilapia representing isometric
growth. According to the reliable growth and high survival rate (98%), it seems that both Nile
and red tilapia could be good candidates for rearing in brackish water condition.

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Iranian Scientific Fisheries Journal
Volume 21, Issue 2 - Serial Number 79
March and April 2013
Pages 23-30

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