plotted against distance collected from ground zero (Fig. 12),
the effect of the site of collection upon the amount of activity
within the organs or tissues is apparent.
Meter readings were taken at each collecting site with a
Juno ionization type instrument at the time the collections
were made.
These values for Runit, Aaraanbiru and Rigili are
given in Table 5
in the Appendix.
On the basis of the meter readings the activity levels in
the terns from Runit and Rigili should be similar, but those of
the terns from Asraanbiru higher.
true,
however (Fig.
12).
This was not found to be
At Rigili,
downwind from ground zero,
there were higher average levels of activity in the terns than
at either Runit or Asraanbiru in which the levels were almost
equal (Table 17b).
The terns taken at Runit may have flown from
neighboring northerly islands since,
able to fly.
although singed,
they were
The birds taken at Rigili, however, probably did
not fly from islands closer to the target area, because all of
the birds observed during the post shot collections at Rigill
were singed or 11] and not inclined to fly.
They would walk
away or flutter with effort from the beach to the water when
anyone came near.
The shore birds and rats have
Analysis by Feeding Habit.
| similar feeding habits; both subsist mainly on insects,
seeds,
and grasses so that 4 comparison of average levels of activity
The
in diverse forms with similar feeding habits can be made.
results are as
follows:
-_
70
~-
OR ARE
1-
4-4 ‘
of a