Impact of chromium trioxide on haematological parameters of freshwater fish, Channa punctatus (Bloch)

An attempt has been made to investigate the impact of Chromium trioxide on haematological parameters of freshwater fish, Channa punctatus exposed to sub lethal concentration for 7, 15, 30 and 60 days. Haematological parameters viz; Hb %, CT, ESR, TEC, TLC PCV, MCH, MCV and MCHC were analysed for different period. Exposed fishes showed an increase in Hb %, and decrease in TLC throughout the experiment as compared to control. However, increasing trend in TEC and PCV was noticed from 7 to 30 days but it decline after 60 days. Both, CT and ESR exhibited a declining trend from 7 to 30 days but abrupt increases in these parameters were recorded after 60 days. MCH and MCV showed fluctuating value. Whereas, MCHC exhibited declining trend throughout the experiment as compared to control