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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

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