From inspection of Table 2 the following conclusions
are made.
There were measurable amounts of radioactivity in
all the pre-shot samples, especially those from Bogombogo.
For similar areas,
the post shot samples were more radioactive
than the pre-test samples by 200-300 times.
The post shot
samples from Igurin were higher than those at Rigili, Aaraanbiru and Runit,
which were closer to the shot island.
Usually
the catch in the fine~meshed net was considerably more radioactive than the catch from a coarser-~meshed net for paired
hauls from the same station, especially in the post shot samples.
Some radioactivity was also found in the plankton preservative.
The activity of the preservative from the Bogallua
collection that was filtered through No. 42 Whatman paper was
10,000 d/m/cc as compared to 11,000 a/m/oc for the unfiltered
sample.
The plankton for the same sample was 100 times greater
(1,100,000 a/m/g wet). The activity of the preservative suggests that some radioactive isotopes associated with the plankton are partly soluble
in a 4 percent formalin solution or
that some of the adsorbed particles are washed off the organisms.
4.3
Algae
The algae collections included five species of blue-green
Qlgae, 14 species of green, 3 species of brown, and 7 species
of red algae.
<A check list of species collected for assay is
gZiven in the Appendix.
Analysis by Area.
Because of the paucity of samples and
hon-randomness of sampling, the best evaluation of the data
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