average highest 23942405 unlike Also ‘‘goatfish. . concentrations how and fish in concentrations 1376, the 239+2 and 1376, that are Pu environmental — to relate It is sufficient to point out here and biological factors is in preparation. +240 these Cs A full discussion are found in the muscle tissue of the pelagic lagoon fish. of 137 of accumulated in higher concentrations in some species than in others because of the capacity individual species of fish have to accumulate these radionuclides from the environment. ingestion 7 of 13 Cs (presently the Therefore to minimize : largest contributor to the small doses from the marine food chain), species of bottom-feeding fish should make up a larger fraction of the marine diet. COMPARISON OF FISH AND INVERTEBRATE RADIONUCLIDE CONCENTRATIONS TO THOSE OF UNITED STATES AND OTHER MARINE FOOD PRODUCTS Recent measurements of radionuclide concentrations in fish muscle tissue and other marine dietary items ‘ sources are summarized generalizations analysis of in Tables can be made fish from a variety of national and by radionuclide 11 and 12 comparing respectively. these concentrations at Several obvious results to independent the international Marshall our Islands. The average concentrations of ee in the muscle tissue of any species from the atolls or islands fall within the range observed in fresh fish typically found in the United States and Japanese markets. The 905, is approximately two to three times less in fish from the atolls or islands than the average 906, concentration found in fish products imported to the United States for consumption. If the sources for canned marine foods imported to Likiep, Wotho, Ailuk, Ujelang, States, fish Utirik, it is obvious exceeds indigenous Mejit, the to and that average these atolls Rongelap the are also 90, concentrations concentration and those islands. in the The Tables 2 and 10 are also within the range of the in present-day muscle 137¢6 supplying tissue of United imported all concentrations fish shown in levels associated with United States marine dietary products and are significantly less than concentrations in many commerical fish consumed in the United Kingdom. Except at Rongelap, concentrations of 1370 in mullet are generally lower than the concentration presently detected Except for the in the mullet second from the east coast of the . 2 trophic-level fish 12 from Rongelap, United 394240, States. : levels in