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Animal Products
Asian-Australasian Journal of Animal Sciences 1999;12(6): 944-950.
DOI: https://doi.org/10.5713/ajas.1999.944    Published online September 1, 1999.
Effect of Hexavalent Chromium on Egg Laying Capacity, Hatchability of Eggs, Thickness of Egg Shell and Post-Hatching Development of Gallus domesticus
Asmatullah, A. Asma, A. Latif, A. R. Shakoori
Abstract
Hexavalent chromium (CrVI) was fed to one day old chicks of Gallus domesticus in the form of different concentrations (250 and 500 mg/kg feed) of potassium dichromate mixed with the feed, ad libitum, for 32 weeks. After 20 weeks of feeding, the total body weight was higher in the low dose (260 mg/kg (feed) group and lower in the high dose (500 mg/kg feed) group, as compared with the control chicks. After 32 weeks of feeding, however, the total body weight was significantly decreased in both the treated groups. Egg laying was enhanced. Fertility remained unaffected, whereas hatchability was considerably decreased after CrVI-treatment. The egg shell thickness increased significantly (13%). Cr was deposited in a dose dependent manner in the liver and lungs. Some structural derangements in liver were also noted in treated chicks. The results of this study i.e., rapid ageing, excessive Cr deposition, decreased hatchability and hepatotoxicity indicate toxic effects of CrVI.
Keywords: Gallus domesticus; Hexavalent Chromium; Egg Shell Thickness; Hepatotoxicity; Egg Hatching
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