Induction of siamese twins in the fish, Oreochromis Mossambicus after the treatment of an insecticide, Rogor 30E

Abstract

Male tilapia, Oreochromis mossambicus intraperitoneally injected with 1.2 ppm Rogor 30E solution, at 1 ml per 100 g b w and mated to virgin females which yielded 30 Siamese type twins-28 atttached at the skin of the belly, 1 at the belly and tail region and the remaining 1 from the trunk region to the end of the tail. Abnormal eye and body size were also found in some of them. It was envisaged that they originated due to impairment of genes controlling development.