-14~
of radioactivity,
indicating that these islands,
Bikar,
Likiep and Rongerik (Appendix Tables A, D, F, and K), had
become contaminated with the 1954 Bravo test fallout as had
Of special
radioactivity in
the island soil,
and the low levels in the
Rongerik.
F
note are the high
Rongelap Atoll.
and we
levels of
fish liver and viscera
coconut samples
collected at
Later collections were not made at these islands
do not know whether
further contamination occurred
7
a
id
=
§
i
there,
as it did at islands to the south and west of the
ay
test site.
Birds were sampled only at Ujelang,
in 1955 and at Tarawa in 1956.
The
Bikar and Rongerik
1955 samples contained
relatively high levels of beta radioactivity, whereas
from Tarawa contained low levels.
from
Tarawa
(Appendix Table G),
those
The white of a tern egg
however,
contained more
beta radioactivity (99 d/m/g) than any other tissue sampled,
and fish,
a principal food item of
these birds,
also con-
tained significant amounts of radioactivity.
ROPMMEohseditg 0-chy 2 eeFie tam
Qualitative analyses of gamma spectra also give an indication of the quantity of the isotopes present.
Analyses of
this kind made shortly after the 1958 collections (Appendix
Table L)
show that gr 25 Wh?
5 and RuLO3, 106_p,103, 106 were the
predominant radioisotopes in the samples.
Two exceptions were
nor
Aye.