Sample Collections and Analytical Results
During 1976, 50 liter unfiltered seawater samples were obtained
from lagoon locations 1, 5, 7, 8 and 10 shown in Fig. 1.
duplicate locations sampled during 1975.
Stations 1 and 5
Between 1975 and 1977 surface
seawater samples were collected at several open ocean locations within the
area of the Northern Marshall Islands.
Plutonium and cesium were separated
from the water samples and the concentrations of
23942405, and 1376, were
determined using published methods (Wo 78, Wo 71).
Our analytical results
are shown in Table 1 along with 1975 lagoon seawater concentrations
previously reported (No 76).
In a few samples where the 2385,
concentrations were above our detection limits,
were computed and are given in Table 1.
the 2385, /73942405,, ratios
For comparative purposes,
concentrations in surface seawater samples collected in the north
equatorial Pacific since 1972,
in Table 1.
from the cited references, are also compiled
At one ocean surface station where the particulate material
collected onal um filter was analyzed, the concentration of 23942405,
associated with the filtered material represented 13% of the total
concentration in the water.
Eighteen mullet (14 female and 4 male), Crenimugil crenilabis, were
collected on October 21,
at Kwajalein Atoll.
386 mm.
1976 from the lagoon reef off Enewetak Island
The standard length of the fish varied from 265 to
Reef fish collected from this island in 1972
(Ne 73) had the
highest reported plutonium body burdens at Kwajalein Atoll.
Mullet are
primary consumers and represent species belonging to the second trophic
level.
Guary and Fraizier (Gu 77) maintain that concentration factors for
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