(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