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, the amount of radtoactivity in fish tissues
at
Bogallua 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,
4.6
liver
( 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.
A check list is given in the Appendix.
In gen-
eral, collections were made 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.
Some plants were
pressed directly in the field for future use in autoradiography;
others were preserved for identification.
Radiological assay of
the plants followed the same procedure used for the other organisms.
stems, roots,
Counts were made on leaves,
and fungi.
-
59
-
flowers,
fruits,