Haematological changes in the fish Clarias albopunctatus (Lamonte and Nichole, 1927) subjected to sublethal concentrations (0, 0.25, 0.5, 0.75, and 1.0 µg/L) of Gammalin 20 for 21 days were studied in a static bioassay renewal system. Compared with the control, the erythocytic count haematocrit values and haemoglobin concentrations were significantly reduced (P > 0.05) in the treatment groups. These parameters also differed in the treatment groups. There was significant leucocytosis (P > 0.05) in the fish exposed to sublethal concentrations of Gammalin 20. The Gammalin-20-exposed fish suffered macrocytic anaemia. Key Words: Haematology, Erythropoietic, Catfish, Gammalin Bio-Research Vol.1(2) 2003: 61-68
BO Mgbenka, NS Oluah, L Umeike
