Response of piscine liver to external gamma irradiation.

Abstract

Adult healthy specimens of Channa punctatus (fish) were exposed to three doses (i.e. 2.25, 4.50 and 9.00 Gy) of gamma radiations from a 60Cobalt source. Five animals were autopsied at each post-irradiation intervals of 1, 2, 3, 7 and 14 days. The liver was fixed in Bouin's fluid and after processing in a routine way, it was examined histologically and compared with control group. The radio lesions appeared on day 2 in 2.25 Gy dose group and on day 1 in 4.50 and 9.00 Gy dose groups. Signs of recovery was seen on day 7 in 2.25 Gy dose group. Liver exhibited normal picture on day 14 in 2.25 and 4.50 dose group but in 9.00 dose group the lesions persisted. The radiation effects were found dose dependent.