All the allometric equations were obtained by applying linear regression analysis to the logarithmic transformation of the data in the form of ln y = ln a + b ln x. The antilog of this expression produces the final equation y =a xb. Each point in the calculation represents the combined group of all the fish per single tank. Descriptive statistics are meanFSE unless otherwise noted. T-tests, simple and multiple regression analyses were carried out using SPSS 7.5 for Windows.