10
1954-55,
similar investigations were carried out in the
vicinity of the Fiji Islands by personnel of the Nankai Fisheries Research Laboratory with the fisheries research vessel,
Daifuji Maru.
The results of these extensive oceanographic,
meteorological, biological and chemical studies,
in which
large amounts of radioactivity were found in the sea and
marine life west of the Marshall Islands,
by Miyake,
2.32
Sugiura and Kameda
Operation Troll.
have been reported
(1956) and by Nakamura
From February to May,
(1956).
1955,
an
investigation of residual radioactivity in the Pacific Ocean
from the nuclear tests of the spring of 1954
(Operation Troll)
was carried out by personnel of the New York Operations Office,
U.
S. Atomic Energy Commission,
Scripps Institution of Ocean-
ography of the University of California and the Applied Fisher-
jes Laboratory of the University of Washington aboard the Coast
Guard cutter,
Kwajalein
Roger B.
Taney,
over a track extending
from
Atoll in the Marshall Islands through the Caroline
and Marianag Islands and the Philippines to Japanese waters.
The survey revealed the continued existence of wide-spread,
low-
level radioactivity in the waters of the Pacific Ocean and in
plankton and fish samples
(Harley,
1956).