Clarias gariepinus fry numbering four hundred and fifty, were stocked in nine concrete tanks. Stocking density was fifty fry per 2 X 2 X 1 metre square tank. The duration for the experiment was three hundred and sixty-five (365) days. Feeding with the hormone ended at 365 days from which normal feeding without the use of the hormone commenced for another 365 days. Clarias gariepinus. fry were fed 0.2mm coppens feed mixed with 17α-Methyltestosterone (MT) at 10% of the fish' body weight from start of the experiment till they were one month old. Subsequently, fish were fed 0.8mm coppens feed from two months old till three months old. Feeding was administered at 10% of the fish' body weight. Clarias gariepinus fish were fed 2mm coppens at four months old. Feeding was also done at 10% of the fish' body weight. 6mm coppens feed was administered to fishes from five months old till twelve months at 5% of the fish' body weight. Thereafter, fish were fed 5% of the fish' body weight for another 365 days. Mean initial weights ranged from 0.053g to 0.065g. Mean final weights ranged from 6.7g to 8.8g. Liver weights for the CLA50 treatments ranged from 3.7g to 8.0g for the male Clarias gariepinus; while the female Clarias gariepinus also in the CLA50 treatment showed liver weights of 4.0g to 12.6g. The CLA100 treatments showed the following weights for the male Clarias gariepinus and the female Clarias gariepinus under the study -6.6g to 14.2g and 5.9g to 18.2g respectively. There were three treatments under study: CLA50, CLA100, CLA0. Treatments were triplicated.

Seven hundred and sixty-five Clarias gariepinus fry were stocked in nine concrete tanks. Stocking density was eighty-five fry per 2 X 2 X 1 metre square tank. Experiment duration for hormone usage was three hundred and sixty-six (366) days. Feeding with the hormone stopped at 366 days and normal feeding without the use of the hormone picked up for another 365 days before findings were carried out. Fry were fed 0.2mm coppens feed mixed with 17α-Methyltestosterone (MT) at 10% of the fish' body weight from start of the experiment till month one. Fish were fed 0.8mm coppens feed in month two and month three at 10% of the fish' body weight. Fish were fed 2mm coppens in month four at 10% of the fish' body weight. 6mm coppens feed was administered from month five till twelve months at 5% of the fish' body weight. Feeding without the hormone continued for another 365days at 5% of the fish' body weight. Mean initial weight ranged from 0.049g to 0.06g. Mean final weights ranged from 6.4g to 8.5g. Weights of the gonads ranged from 31.5g to 117.8g for the C50 treatment. Weights of the testes however, ranged from 0.8g to 11.5g also for the C50 treatment. Weights of the gonads for the C100 treatment ranged from 87.2g to 244.4g, while weights of the testes for the C100 treatment were from 3.9g to 18.6g. There were three treatments: C50, C100, C0. Treatments were in triplicates.