from fish. The doses from clams are calculated using the detection limits as the concentrations, actual Table 6. These 30-y doses so the can be doses will compared be less with than the those United listed States in Federal guideline for whole body of 5 rem in 30 y. Listed in Table 7 is the contribution of each integral dose importance, from fish. and the The 1376 transuranics is most radionuclide to the 30-y significant, sr is contribute a rather small second fraction of in the 30-y dose. In Table 8 the 30-y integral doses are listed for each fish. From this table the dose can be calculated for any combination of marine food products. The predicted doses from combinations of different fish will differ little from the average values previously given. DISCUSSION Radionuclide concentrations in fish muscle Table 9 from the results in Table 2 and Ref. all reef and pelagic tissue are summarized in 7 to show the average levels in lagoon fish from each atoll or island. Table 10 shows the average amounts accumulated in muscle tissue of individual reef fish and all pelagic fish from all atolls or islands. Inspection of this and Table 2 90 shows that concentrations of s yr in -muscle tissue are very’ low (undetectable difference in in many the of “the average At all atolls or : higher concentrations . pelagic lagoon level species significantly islands. The fish. the 239+240 Further, from from from concentrations similarities muscle Pu than the . and respect to tissue distributions, . (mullet of differences that trophic muscle Pu in . 239+240 highest lowest food Pu. Whereas levels in chain of behavior the Pu the muscle muscle among all tissue of . contain tissue tissue species the of surgeonfish) differ the results . provide 11 with feeding habits, not parallel mullet are found bottom-feeding . trophic does analyzed, of from the other atolls or . s Pu. second level relationships, 137, of from . and environmental concentrations of the transuranics has been discussed. The little fish fish in convict species reef . is 239+240 Cs and all 239+240 in these there different 137 amounts of and that the tissue concentrations Rongelap . and This is not the case for islands of : analyzed) concentrations different atolls or islands. . samples 28 that of have the 1376. concentrations are fish such as mullet and to