(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