-
On January 15 and 16, each of six groups of 202 amphipods commonly avast
called beach hoppers or sand fleas, was subjected to X-rays.
doses were 150r, 900r, 6,400r, 16,000r, 32,000r, and 82,000r.
also 6 control groups each consisting of 20 individuals.
The six
Therewere
The highest -_
dose rendered all immediately sluggish; the first deaths (3) occurred
on the fourth day and all died within 10 days, In the next group: tio
thirds nad.‘Hed by the end of January,
In the 16,000r group only two-thirds.
renained, slimyat the end of the month, but the dead were not all found,
apparently baving been eaten by less severely affected indtviduals.
In
the other 3 irradiated groups and in all controlgroups the amphipods were
alive and active at the end of the month.
III. Study of the Bikini material collected during the summers of 1946 and
1947 contimed.
Radioautographs are being made of the material and a report
is being formulated gathering this data together.
Recounting of some of the material has been started and a report on
some special problems of absorption is being prepared.
IV.
The mitual exchange of material and information between the Applied
Fisheries Laboratory and the Hanford Enineering Works continues to function
effectively.
1
\
Mr. Richard F. Foster and Mr. Philip A, Olson visited the Laboratory for
¥
conferences.
Dr. Albert W,. Bellamy, Dean of shao! cal Sciences, University of California,
‘Los Angeles and Mr. Robert J. Mather Administrative Assistant,
Atomi.c Energy ‘Project, Unkversity of Calfornia, Los Angeles visited the
\
laboratory for conferences and discussionion project matters,
\
Lonnhe. mutes
{auren R. Donaldson,Director
of Contract No, We28-094~-eng-33
ete,
alone
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