Effect of heavy metals pollution on some hematological parametersand morphology of red blood cells in Oreochromis niloticus (L,) in Lake Maryut

Abstract

Fishes were collected from three sites, Location (1) East basin (Fish
Farm), Location (2) Main basin and location (3) South East basin.
Locations 2 and 3 had the highest levels of BOD, COD, turbidity, total
hardness and alkalinity. pH values tend to be acidic in both locations 2
and 3 and tend to be alkaline in the reference site (location 1). Highest
levels of cadmium, chromium, nickel and lead were found in both
lcations 2 and 3. The highest levels of Mn were found in location 1 (fish
farm). The number of red blood cells, hemoglobin, hematocrit and MCV
decreased significantly in fishes of both locations 2 and 3 compared to
fish of control site. Levels of MCH and MCHC concentrations increased
significantly in fish of both locations 2 and 3 compared to fish of
location 1.
Levels of alanine transaminase (ALT), aspatate transaminase (AST) and creatine phosphokinase (CPK)
increased significantly in plasma of O. niloticus of both locations 2 and 3 compared to fish of location 1.,
which may be due to heavy pollution of these two locations.