clam :
the tr
Ailinginae tuna (14,000 pyc/gm of caudal fin) was the same as the Zn** contamination of
a tuna from Bikini Lagoon which assayed 16,000 uyuc/gm of caudal fin. The relative
values of (y/min)/gm in Table 1.9 have been corrected for the counting efficiency of
trace
the principal isotopes detected in the same or similar specimens.
Th
A radiochemical and gamma spectrographic analysis of various EPG organisms
partic
shown in Table 1.11 and in less detail in Table 1.9 indicates the presence of Mn*™, Co*’,
Co, Zn®, Ru, ce!and Cs", with considerable variation among different organisms.
The d
in Tal
greate
Only the long-lived parent radionuclide has been considered for yc oomputation.
Mostof the radioactivity detected in the marine organisms was not direct fission acti-
and ve
vity but instead was probably induced and spallation products of elements associated
with the 1954 nuclear devices. The high concentration of zinc and cobalt isotopes in
On the
perce
At
was n
reef.
fish and mollusks was probably due not so much to a high production yield but to bioRADIOACTIVITY LEVELS OF CERTAIN ORGANISMS FROM AILINGINAE LAGOON
Organism
4-inch
4-inch
$-inch
8-inch
8-inch
8-inch
Tridacna
Tridacna
Tridacna
Tridacna
Tridacna
Tridacna
(y/min)/gm
liver
muacle
liver
muscle
mantle
liver
Hippopus liver
Hippopus gills
Hippopus muscle
Hippopus stomach
3-inch Hippopus liver
3-inch Hippopus mantle
3-inch Hippopus stomach
4-inch Mullet, whole
4-inch Mullet, viscera
Beche-de-mer
Principal
Isotopes
Organism
1,120
456
3,800
7
6
2,360
Co, Za
Co
Co, Zn
~_
_
Co, Za
Phytoplankton and
inorganic matter
Phytoplankton and
inorganic matter
Phytoplankton and.
inorganic matter
1,600
Co, Zn
eee
nicwaar surt
108
11
230
~~
_
Co, Ru, Ce
122
Co, Zn
23
23
536
1,224
29
.
Coral, lagoon, white
Coral, lagoon, pink
~~
_
Zao, Ru
Za, Ru
Ru, Ce
- 64
Ce, Ru
{
480
Ce, Ru
4
Zn*
23
20
Ce, Ru
Ce, Ru
20
2
Coral, ocean, pink
,
,
20
Algae, ocean, green
Algae, lagoon, green
Lobster, ocean side
Coconut crab
Coconut, green
Coconut, milk
Coconut, ripe
Pandanus fruit
Ce, Ru, Zn
ll
2
59
250
205
47
$1
85
47
Isotopes
Ce, Ru
134
Coral, lagoon, green
Coral, ocean, white
Principal
showe
the s:
comb
feedir
mulle
Tr
lagoo
(y/min)/gm
Ce, Ru
7
Ce, Ru
,
‘
Ce, Ru
.
Ru,
Ru,
Ru,
Cs,
Coe
Ce
Ce
Ce, Ru
Cs
Cs
Cs
Cs, Ce
logica] requirements of some fish and mollusks for these isotopes. Various portions
of tuna taken from sea water containing 5 x 10~" percent zinc have been shown to contain 0.1 to | percent zinc (Reference 1), thereby concentrating elemental zinc by a
factor of 107.
.
Table 1.11 also indicates a concentration of cobalt in the livers of some fish. This
may be due moreto a diet of cobalt-contaminated food than direct concentration over
that of the water. Clams and mollusks contained chiefly Co’ and Co®. The basses and
snappers, which feed on mollusks and small crustaceans, as well as fish, showed equal
amounts of Co® and Zn**, while the tuna contained chiefly zn®®.
The variation of cobalt and zinc in fish and clams is visibly demonstrated by the
26
in the
to Co
Pt
taine:
wate!
of Cc
neve)
ganic
T!
amou
4
in the
snail
and f
|
gamma energy spectrum of unprocessed, dried livers of bass, tuna, and the tridacna
y/mir
zinc
Ae Yee tte ne. NE eet en be emer ny.
TABLE 1.9
1.
ence
exter
Ope)
wate
cula
thro
dept
Ané
Sb!2!