To understand the contribution of radiation dose to human from consumption of catfish, a comparative radiological assessment study was performed on farm and river raised fish. Gamma spectroscopic analyses of catfish indicated the presence of isotopes of 40 K, 226 Ra, and 228 Ra with activity values of 99.4 ± 14.5, 0.41 ± 0.05, and 0.89 ± 0.08 Bq kg -1 respectively in farm catfish and 101 ± 15.7, 0.47 ± 0.05, and 0.97 ± 0.050 Bq kg -1 respectively in river catfish. The measured activities in two sets of samples were statistically compared using a twotailed t test at 95 % confidence interval and results indicated that activities of 226 Ra and 228 Ra were significantly different.

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