of this radionuclide are not known.
of Fon,
13765 and 99sy observed, Fe body burdens were probably
~ small (9).
| 1957.
However, based on the levels
The Rongelapese returned to the atoll in mid-July,
Whole body counting and urinalysis measurements one year
later disclosed significant body purdens of several radionuclides,
the most notable being 13 Tos,
It is probable that 556 body
burdens increased similarly.
|
the concentrations of ne. in a selected species of fish
and in soils are listed in Table 20
Activity in the fish is
based on wet weights for comparison with previous work.
Pooled
samples were used in the analyses to xeduce the effect of withinsample variation.
The 556 values for soil samples collected
in 1963 at both Kabelle Islet and Rongelap Islet are averages
of samples collected at depth increments of O-1.3 cm and 1,3-2.5
em.
Specific activities are not given for soils since varying
amounts of pre-1954 plant detritus could significantly alter the
stable iron content but not the ar activity.
In this instance,
activity per unit weight of soil is a better index of changes
which occur as a result of input or loss than is specific
activity.
|
|
The decrease in Se specific activities in Mulloidichthys,
sp.
(goatfish)
at Rongelap ‘between 1959-1961 corresponds to an
ecological half-life of 11 months, identical to that observed
by Jennings (11).
Higher specific activities may have occurred