fish are also comparable to those concentrations in similar types of species consumed in the United States. The Pu concentrations surgeonfish lower from Rongelap are consumed in the United Kingdom. than average in mullet and convict levels in pelagic fish The Pu, however, presently contributes only a small fraction of the dose from ingestion of marine food products. DOSE COMPARISONS The estimated, maximum annual radionuclide dose rates consumption of fish are about 0.01% of the 500 mrem/y Federal most atolls and islands and about 0.02% for Rongelap. from the guideline for The 30-y integral doses range from about 0.01 to 0.06% of the Federal 30-y guideline of 5 rem. The estimated doses from the consumption of clams is only a very small fraction of that from the intake of fish (on the average, body and less than 10% for bone marrow). less than 0.54 for the whole The clams contribute this very small fraction of the dose in the marine pathway even though detection limit values were used as the actual concentration. will be less than these values. In fact, the concentration in clams Therefore, the actual doses from ingestion of clams will be less than those shown in Table 6 and would actually contribute an even smaller fraction of the dose relative to fish. The doses estimated for the various radionuclides for the marine pathway must be viewed with the likely source of each radionuclide in mind. The doses listed here are based on the currently observed radionuclide concentrations at the atolls and islands. The Cs and Sr concentrations in fish from the atolls and islands are similar to those observed in fish from other locations around the world Therefore, in which doses the concentrations calculated for nuclides in the water column. Cs and are Sr derived reflect from global concentrations These concentrations can increase fallout. of these if any type of global atmospheric testing occurs because the primary source of these two radionuclides tests is contributes from global only a fallout; small any fraction of residual the activity activity from that is the 1950 presently associated with the muscle tissue of fish. The radionuclide concentrations and radiological) decay. doses assuming are that However, calculated they are using the removed by current only physical the residence time of Cs and Sr oceanic water columns is less than their 30-y half-life. (i.e., in the upper Therefore the doses, in absence of any further testing, are probably overestimated. 13 radionuclide