الوصف

This study was demonstrated to investigate the effect of lead toxicity on tilapia nilotica (Oreochromis niloticus). After 15 days of adaptation, fish (4514.8g) were exposed to 150 and 300 jug 1-1 Pb-12 (PbO) with or without 100 mg CaCO3 F1 for 30 days followed by 15 days for recovery. The haematological parameters (RBCs, WBCs, Hb, PCV, MCV, MCH and MCHC), biochemical parameters (AST, ALT and glucose) and histological changes (in fish liver and gills) were evaluated. Significant differences in RBCs, WBCs and PCV were observed; however, these effects decreased after the recovery period with CaCO3 treatment as well as in biochemical parameters, it reached its highest values at exposure while it decreased at recovery period and with using calcium carbonate treatments at exposure and recovery period. The histological sections supported the haematological and biochemical analysis. This work reported that lead has toxicity effects on fish and these effects decreased with the use of CaCO3 as a protective agent and after recovery period.

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الملخص

الكلمات الدالة

Tilapia, Lead, CaCO3, Haematology, Biochemistry, Histology.