Teratological effect of various sublethal concentrations of chromium hexavalent [Cr(VI)] on the gills of Cyprinus carpio. | [International Journal of Agriculture and Biology • 2012]

Author(s):

1. Shaheen Tayybah: Fish Seed Hatchery, Satyana Road, Faisalabad, Pakistan

2. Munawar Khan: Fish Seed Hatchery, Satyana Road, Faisalabad, Pakistan

3. Khalid Pervaiz: Fish Seed Hatchery, Satyana Road, Faisalabad, Pakistan

4. Muhammad Ashraf: Fish Seed Hatchery, Satyana Road, Faisalabad, Pakistan

5. Akhtar Tanveer: Department of Zoology, University of Punjab, Quaid-i-Azam Campus Lahore, Pakistan

6. Muhammad Ismail Chughtai: Nuclear Institute for Agriculture and Biology (NIAB), P.O. Box 128, Faisalabad, Pakistan

Abstract:

The objective of the present study was to identify the degree and damage to the histological structure of gills in Cyprinus carpio exposed to various sublethal concentrations of chromium hexavalent [Cr(VI)]. For this investigation 168 C. carpio breeders (W=500±9.5 g; L=25.60±2.6 cm) were divided at random in to control (n=24) and experimental (n=144) @ 8 breeders/tank (8.84 m3). Control was kept in normal water, while experimental were monthly exposed to various sublethal concentrations of Cr(VI) (25, 50, 75, 100, 125 & 150 mg/L) separately in triplicate for six months. Actual chromium in water was measured on atomic absorption on monthly basis. In exposed group gill epithelium was found to be severely damaged, necrosed and peeled off with hyperplasia at all the Cr(VI) concentrations in temporal dose pattern. Absconding secondary lamellae and talengectases were noted at 125 and 150 mg/L Cr(VI) concentration. Actual chromium concentration varied from 36 to 118 µg/mL in tanks exposed to Cr(VI) from 25 to 150 mg/L. However, gills had normal histological structure in control. Present results showed that Cr(VI) is highly teratogenic metal and its deteriorating affect increase with the increase in concentration of metal.

Page(s): 318-320

DOI: DOI not available

Published: Journal: International Journal of Agriculture and Biology, Volume: 14, Issue: 2, Year: 2012

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