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there is what might be called a strontium, cesium food cycle
on land and a cerium food cycle in the lagoon.
Summary
1.
Periodic determinations of radioactivity in land crabs from
Belle Island, Eniwetok Atoll, were made over a period of nearly
two years following the 1954 atomic testing progran.
2.
Radioactivity in the exoskeleton was found to be due almost
entirely to radiostrontium and the 90 daughter of Sr? ana
remained at a nearly constant level, excepting physical decay.
3.
An estimate of contributions of radiostrontium from previ-
ous tests to crab skeleton at Belle Island is given.
&,
Long-lived fission products in muscle tissue consisted of
84 per cent cst37, 10 per cent gr90 4 ¥90 and 1 per cent
Cel t4 + prt
5.
A possible association between the availability of cesium
and rainfall is suggested.
6.
During the first 150 days following a nuclear detonation the
rate of decline of radioactivity in organisms on an atoll island
may be considered to approximate the rate of decay of mixed
DOE ARCHIVES
fission products.
7.
In so far as the long-lived fission products strontiun,
cesium and cerium are concerned there appears to be 4 strontium,
cesium food cycle on land and a cerium food cycle in the lagoon.
Ue