Population differences in the toxic effects of heavy metals to Littorina saxatilis olivi (prosobranchia: Mollusca)

SIGLEAvailable from British Library Document Supply Centre-DSC:DXN008451 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Effects of industrial effluents on some haematological parameters of Sarotherodon melanotheron and Tilapia guiniensis

The effects of petroleum refinery and fertilizer plant effluents on some haematological parameters (packed cell volume - PCV, Total Leucocyte Counts - TLC and Differential Leucocyte Counts) in two species of cichlids; Sarotherodon melanotheron and Tilapia guiniensis were studied. This was with a view to assessing the usefulness of these parameters as indicators of pollution in Niger Delta Estuaries. Average Packed Cell Volume (PCV) ranged from 24.4 + 3 to 24.4 + 4.4 cm3 in T. guiniensis while the values for S. melanotheron ranged form 24.3 + 3 to 26.5 + 4.7 cm3. PCV is probably not a good indicator for contaminants in both species. There were high significant differences (