Lawee, A.Y.Kigbu, A.A.Danwali, M.I.2023-12-112023-12-112017-01-11Auta, J. (2000). Acute toxicity of dimenthoate to juveniles of Oreochromis niloticus (trawaves) and C. gariepinus (teugels), Ph.D Thesis Ahmadu Bello University Zaria, Nigeria, Pp 150 – 158. Auta, J. Akende, G.A., Balogun, J.K., Oniye, S.J. and Babatunde, M.L. (2000). Acute Toxicity of Cypermethrin to Oreochromis niloticus (trewavas) A paper Presented at the 15th Annual Conference of the Fisheries of Nigeria (FISON) 19-24th march 2000 Jos, Plateau State Babatunde, M.M., Oladimeji, A.A. and Babatunde, J.K. (2000). The toxicity of Gramaxone to Oreochromis niloticus (trawavas), M.Sc Thesis Department of Biological Sciences Ahmadu Bello University Zaria, Nigeria.https://keffi.nsuk.edu.ng/handle/20.500.14448/2157The influences of basagran, a widely used herbicide on the behavioural actions,( Opercular and tail fin beats) per minutes and the haematological characteristics of blood on juveniles of C. gariepinus were investigated under laboratory conditions. The orders of behavior of the fish were restlessness, loss of balance, air gulping and period of quiescence and finally death. Also, blood and mucus around the gills of the fish certified death were observed. However, the intensity of their actions and mucus accumulation were more pronounced in tanks containing the higher levels of the toxicant. The opercula ventilation and tail fin beats ware significantly (P<0.05) higher than in the control fish at the exposure period of 12, 24 and 48hrs. By 72- 96-hrs both the opercula and tail fin beats of the exposed fish showed marked reduction compared to the control tanks. The results of the opercula and tail fin beats were seen to be dose-dependent. Haematological results showed a significant (P<0.05) reduction in the values of haematocrit and total erythrocytes count with increase in concentration and time of exposure where as the values of total leucocytes count increase with increase in concentration.enAcute, Basagran, Haematology, Opercula and tail fin beats.Article