more tissues rather than on counts of the entire organism,
as was done for certain treatments of the fish data.
Attempts
to compare species by areas on the basis of the ratios of activity of their tissues were thwarted by a lack of some samples and by the presence of many samples with only background
counts,
i.e., net sample counts of zero.
Also,
the method
of ranking was considered but was believed to be inadequate
because of the great effect of surface contamination upon the
average of a limited number of sample counts (see p.18).
Results.
Table 5,
page
Appendix Table 1
gives
individual sample values.
32, shows average amounts of radioactivity in
the main invertebrate groups: at the collecting localities.
Blanks indicate no specimens were found.
out the
These values bear
inverse relationship of radioactivity to distance
from the test sites
for operations previous to Ivy,
extended from Runit Island to Engebi Island.
which
Within this range
the only significantly low counts came from a small collection made by navy personnel on Piiraai Island.
However,
it
is probable that because of this island's position relative
to the prevailing winds, waves, and current it neither initially
in spite
received nor retained large amounts of radioactivity,
of its intermediate position between two shot islands.
Igurin
and Japtan Islands were almost equally low, and Rigili higher.
Because of their marked influence upon the averages,
the
high-counting samples included in Tabie 5 and Appendix Table
are listed separately in Table 6.
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