‘te
sos
thet
often
.
.
ar ee
ae eo -Ue te
wt
7. St
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a oe BT
ee A ae
ee
tt teWhy Sek pee yeom Ry oe
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were pe LL Tikes
:
et
ET
*
in an environment where 6005 is available, the more 6006 it
accumulates in the kidney,
life.
if 006 has a long biological half-
This is not a concentration through the food web since
the clams are filter feeders.
The radionuclide content of bird species presents a sharp
contrast, both qualitatively and quantitatively, associated with
feeding habit (Table 8 and Appendix Table 10).
The fairy terns
and noddy terns feed mostly at sea outside the lagoon and contain
small amounts of fallout radionuclides,
naturally occurring 40,
of 137 G5,
The curlew,
less than the amount of
They contain barely detectable amounts ©
on the other hand,
feeds on the reef and
on Scaevola sp. seeds, and consequently contains relatively large
amounts of 13766, as much as 2,300 pCi/g dry in muscle.
The
turnstones also feed along the beaches and on the reef, and
contain both
60
Co and
stones is not known,
of sand particles.
1
370s.
.
The source of 1374. for the turn-
although it could be by direct ingestion
The yellowfin tuna, which are feeding on
essentially the same organisms as the terns, contain about the
same levels of
60
.
Co as the fairy terns.
The
60
.
Co levels in the
noddy terns are somewhat higher but still are of the same order
of magnitude.
Thus the area in which an animal is feeding is
a factor affecting its radionuclide content, as expected, in
relation to the distance from the source of the radionuclide.
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