Haematological Responses of Clarias Gariepinus and Oreochromis niloticus Juveniles Exposed To Sub-Lethal Concentrations of Glyphader 480® Herbicide
Yongu, J.T. Cheikyula, J.O. & Annune, P.A.
Department of Fisheries and Aquaculture
Federal University of Agriculture, Makurdi, Benue State, Nigeria
ABSTRACT
This study was designed to determine the haematological responses of juveniles of Clarias gariepinus and Oreochromis niloticus exposed to different sub-lethal concentrations of Glyphader 480 herbicide during a period of 8 weeks. The toxicant led to significant (P<0.05) changes in haematological parameters as the toxicant concentration increased. Haemoglobin content (Hb), Mean Red Blood Cells (RBC), Packed Cell Volume (PCV), Haemotocrit (HCT) reduced as the concentration of toxicant increased while other parameters (WBC, MCV, MCH, PLT and MCHC) increased proportional with the toxicant concentration. Replacement of Glyphader 480 with less harmful and more biodegradable herbicides is recommended.
