Abstract
The effect of various concentrations of fluoride (NaF) (10, 20, 30 and 40ppm) after 15 days of exposure on some haematobiochemical parameters of Channa punctatus (Bloch) has been studied. Changes in the shape and size, cell membrane and nucleus of the R.B.C. were observed. Clumping of the R.B.C. cells was noted. Clumping becomes prominent in higher concentrations. The TEC, Hb, PCV, MCV, MCH and MCHC progressively decreased with an increase in the concentration of fluoride. The length/ breadth ratio of erythrocyte and erythrocyte nucleus do not depart significantly from normal values and as such there is no significant change in erythrocyte and nuclear surface area.
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