less with distance from shot islands, with the exception of
Rigili, and were least to the south and southeast within the
atoll.
The average increase
in all tissues from pre-shot to post
shot activity was greatest by far at Bogallua (Fig. 6 and Table
10).
Although Engebi and Bogallua were about equidistant from
the target center,
at
the amount of radioactivity in fish tissues
Bogallue showed an increase of from 4 to 18 times that of
the fish tissues at Engebi.
The data indicate that, of the radio-
active materials taken into the gut at Engebi or Bogallua, a
greater proportion reached the four other tissues
bone, liver
4.6
( muscle,
skin,
) of fish at Bogallua than at Engebi.
Land Plants
The plants collected before and after the shot included
15 species of flowering plants, 4 species of fungi, and 1 species
of lichen.
Some of the plants were collected at only a few of
the stations.
eral,
<A check list is given in the Appendix.
collections were made
In gen-
in the areas where rat traps were
set (p.62), but a few were made along the beach or wherever it
was possible to obtain certain of the species.
in autoradiography;
pressed directly in the field for future use
others were preserved for identification.
Some plants were
Radiological assay of
the plants followed the same procedure used for the other organisms.
Counts were made on leaves,
stems,
roots,
flowers,
and fungi.
-~ 597 -
.
roy
fruits,