-
2.
The Mn“,
17
-
Co°? and cst 3? values were much less than
the «40 values for all tissues except heart.
3.
(wet)
The largest average values were 140 and 130 pe Ru 7g
for liver and kidney tissues,
respectively,
single value being 810 pc ru l°3/, (wet)
4.
the largest
for a liver sample.
No one tissue had consistently high values for all
radionuclides.
The results of analyses for Fe>> in 13 tissues from one
tuna indicate that the maximum values were those for the bloodrich tissues--gill,
pc/g
(wet)
to zero
spleen and kidney.
(skin)
Values ranged from 9.8
and hence were not greatly different
from the «40 values.
In conclusion,
the results of Kawabata et al.
(1963)
and
those reported here indicate that fallout during the spring and
summer of 1962 contributed very little radioactivity to the tuna
in the western Pacific.
Residual fallout nuclides were detectable
in some tuna samples collected before the 1962 tests of nuclear
devices at Christmas Island but in amounts one-third or less the
amount of radioactivity from naturally occurring Kt.
There was
little change in these values during the sampling period except
for an increase in the amount of Zr?°-Nb?> and Rul in some of
the September and October samples.
The nature of the distribution
of fallout nuclides in western Pacific tunas is that of a
little