- 62 - Scientific Committee on the Effects of Atomic Radiations (Hiyama 1960). The values in Table VII probably are not from random samples, as it was stated for part of the sample -- the 1954 yellow fin tuna -- that it was the most intensively contaminated individual in a lot of about 100. The values in Table VII appear to be well below the allowable daily intake, with the possible exception of the kidney of the big eye tuna caught in June 1956. The distribution of Sr?° and csl37 in the sea deserves special comment because these are the two fission products that are of greatest public concern. They are produced in substantial quantities (about 1-1/2 times as much Cs!57 as sr9°), have long half lives that are approximately the same (28 years), to some degree by man. However, and are metabolized in marine organisms these two radioisotopes are either absent or present in only very small amounts (Table V and Table VII). Some strontium is found in the bone of fishes but at much lower levels than in bones of terrestrial animals. The uptake of radio- isotopes from the sea is inversely related to the quantity of available stable isotopes of the same element, or of