Amelioration the Toxic Effects of Cadmium-Exposure in Nile Tilapia (Oreochromis Niloticus) by using Lemna gibba L

作者：Kaoud Hussein A^*; Zaki M**** M; El Dahshan Ahmed R; Saeid Sherein; El Zorba Hesham Y

来源：Life Science Journal-Acta Zhengzhou University Overseas Edition, 2011, 8(1): 185-195.

• Cadmium
• histopathology
• Lemna gibba L
• amelioration
• Oreochromis niloticus

The effect of cadmium (Cd) toxicity and its impact on histopathology, haematological, and biochemical changes in Nile tilapia (Oreochromius niloticus) were studied. Fish (35-45 grams) were exposed to Cd that resulted in significant reduction (p< 0.05) of the erythrocyte count (RBCs), haemoglobin content (Hb) and haematocrit value (Hct). Significant increases in plasma aspartate aminotranseferase (AST) and alanine aminotransferase (ALT) were observed in fish exposed to Cd. The obtained results indicate that Lemna gibba L weed and their extract are effective in removing Cd from water and reducing Cd bioaccumulation in fish. The addition of Lemna gibba L-extract reduced significantly (p< 0.05) the Cd level in water and the metal uptake as compared to fish exposed to Cd alone. The Cd concentration in water was 9.620 +/- 0.198 mg L-1 and it decreased significantly (p< 0.05). The Cd accumulation in liver and muscles of fish exposed to Cd alone was higher than that of Lemna gibba L-extract treatment. The addition of Lemna gibba L-extract improves the haematological parameters (RBCs, Hb and Hct) and ameliorates the toxic effect of Cd which indicating the capability of Lemna gibba L-extract to chelate Cd from the media. Subsequently, the Cd toxicity was reduced. This study indicates that Cd poisoning cause structural damage in the fish organs. It is also demonstrated that Lemna gibba L-extract, weed or the weed plus the extract provided protection against the degenerative action of Cd and increased the chance of tissue regeneration. [Hussein A. Kaoud, Manal M. Zaki, Ahmed R. El-Dahshan, Sherein Saeid and Hesham Y. El Zorba. Amelioration the Toxic Effects of Cadmium-Exposure in Nile Tilapia (Oreochromis Niloticus) by using Lemna gibba L. Life Science Journal. 2011;8(1):185-195] (ISSN: 1097-8135). http://www.lifesciencesite.com.

• 出版日期2011