one-third the value reported by Jennings
sockeye Salmon from Petersburg, Alaska,
(1968)
in 1964.
reported by Jennings
(1968)
Bristol Bay,
in 1967 and by Jenkins
Alaska,
salmon from Kotzebue,
5
Yet,
the levels
for sockeye and Chinook salmon from
Alaska,
(1968)
fer chum
in 1968 are of the order of 500 Pci
.
Fe/fmg Fe,
for chum and
ses
or less than the levels in Pacific tuna from the
northern hemisphere by a factor of more than two.
Iron~-55 in
salmon from Alaska and the Washington coast appeared to decrease
from 1964 to 1967 more rapidly than expected from decreases in
the rate of fallout
+t
ge
(Jennings,
.
»
was no Significant decrease in
years 1967, 1968,
tuna.
1968;
55
Jenkins et al.,
ws
woe,
1968). There
.
Fe specific activity during the
and 1969 in either Atlantic cod or Pacific
Since the salmon were generally from areas of maximum
rates ofca
55
2
‘
Fe fallout in
1963 andaq 1964,
*
*
4
1
aL
it
is
possible
that
the
.
8
55
decrease was a relatively localized phenomenon and that the
Fe
levels in fish from the North Atlantic and from latitudes south
of 40°N in the North Pacific approached equilibrium with the rate
- 5.5
of fallout of
Fe.
boy
eae
atekeugh Lhe large variability of the data
casts doubts on the validity of such arguments, nevertheless,
they ere useful
Tt
is
as working hypotheses.
clear that
latitudinal differences occur in the North
Atlantic end thet at least hemispheric differences occur in the
Folsom and Young
(1965)
sampled d stinct North Pacific
and South Pacific populations of albacore
Jes
Pecific.
(hunnus alalunga)
in