(Appendix Table 11). Presumably, the 90 Sr is being accumulated throughout the life of the fish and a steady state has not been reached. The values for ?!sr in the ulua (Appendix Table 12) and the reef fish cannot be directly compared because the bone of the ulua was analyzed for 905, and only whole eviscerated reef fish were analyzed. However, a comparison of Appendix . Table il and 12 shows that there can be no great difference in Sr content between larger, older fish of even the grazing herbivore and the higher order carnivore. On the basis of the differences between 60.0, content of goatfish and ulua, it might be assumed that there is an increasing concentration of the radionuclide in the ascending food chain. evidently not true for 90 Sr. However, this is The discrepancy probably exists because information is lacking on the radionuclide content of other organisms on which the ulua feed and which could well conergy 60 Department of En centrate Co, for example, squid. Historian’s Office ARCHIVES _. Another example of increasing concentration_of a radionuclide probably associated with age is the concentration of ©0G0 in the kidney of the giant clams Tridacna sp. and Hippopus hippopus (Appendix Table 9). By far the highest levels of 60 G6, as much as 4,000 pCi/g dry, in any organism at Bikini Atoll is in the kidney of these clams. accumulation of 4 5002459 60 Obviously, there must be an ° : Co in the kidney and the longer the clam lives