(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 995, in the ulua (Appendix Table 12) and the reef fish cannot be directly compared because the bone of the ulua was analyzed for 295, and only whole eviscerated reef fish were analyzed. However, a comparison of Appendix Table 11 and 12 shows that there can be no great difference in Cnr content between larger, older fish of even the grazing herbivore and the higher order carnivore. On the basis of the differences between 6000 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 295 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 concentrate 6900, for example, squid. Another example of increasing concentration of a radio- nuclide probably associated with age is the concentration of 60 C5 in the kidney of the giant clams Tridacna sp. and Hippopus hippopus (Appendix Table 9). as much as 4,000 pci/g dry, By far the highest levels of 69%, in any organism at Bikini Atoll is in the kidney of these clams. Obviously, there must be an ‘ 6 . ' . accumulation of °C in the kidney and the longer the clam lives