LO
However, the values reported by Preston
(1970)
for cod and plaice
from northern latitudes were higher by from three to four orders
of magnitude.
os
conteined
37
magnitude
as
Pacific salmon sampled in 1967 (Jenkins, 1969)
ws
.
Cs concentrétions generally in the same order of
those of the
eas
Magnitude greater.
cod but
in
some
cases even
tee
These differences between
137
an order of
as
Cs concentrations
in tune and those in the fish from the middle and northern latitudes reflect the well-known latitudinal differences in worldwide fallout
1
(Joseph et al.,
.
.
the contributions of
137
in press)
and probably also reflected
:
Cs from surface runoff in some areas,
as
Preston has pointed out.
In recapitulation:
The tuna from the southern hemisphere
tended to have lower concentretions and specific activities than
tuna from the northern hemisphere.
.
.
trends in the data when
with species,
55
tes
.
location of fish,
There was a close correlation of
;
muscle,
1
55
contained
+46
Co believed to be
[He
Cesium-137
1
.
tok
55
.
Fe concentration between
Yellowfin tuna caught near Bikini Atoll
.
60
correlation of
Co
and liver.
toes
or size of fish.
specific activity in light
dark muscle and liver and of
dark muscle and liver.
a close
es
Fe specific activities were compared
month of catch,
.
There were no significant
derived
from the
atoll.
There was
.
concentrations between dark muscle
concentrations were
lower than those
reported for fish from middle and northern latitudes by three to
five orders of magnitude.
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