EFFECTS OF PROLONGED EXPOSURE TO CADMIUM ON THE HEMATOPOIETIC ORGANS IN GRASS CARP    (CTENOPHARYNGODON IDELLA, CYPRINIDAE)

BASIM M. JASIM

EFFECTS OF PROLONGED EXPOSURE TO CADMIUM ON THE HEMATOPOIETIC ORGANS IN GRASS CARP (CTENOPHARYNGODON IDELLA, CYPRINIDAE)

2008

BASIM M. JASIM

Destruction of spleen and kidney components in C. idella started on the 17th day in specimens subjected to 20 µg•L-1 Cd . The spleen was actually destructed after 73 days of exposure to 60 µg•L-1 Cd , where the two pulps can not be distinguished clearly, as the splenic blood vessels contained less blood cells . The kidney showed a complete destruction and the hematopoietic tissue lacked a distinguishable border whereas the necrosis covered large area after 60 days at 60 µg•L-1Cd . The degree of destruction was lineary proportional to concentration of toxicant and period of exposure although the period was somewhat more effective . It was concluded that the histological alterations in spleen and kidney could be used as an indicator for water pollution with cadmium and for fish health as well .

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