.
.
ws
60
:
1964 and found that the concentration of
Co in the northern
population
was approximately
Pp
Pp
y five times that in the southern
_s
population;
ws
.
.
55
.
this supports the conclusion that
Fe concentrations
are generally higher in northern hemisphere tuna than in southern
The results of analyses of tissues from the yellowfin tuna
caught off Bikini Atoll in 1969 show the large variability that
can be encountered even with fish of approximately the same size,
caught in the same place within a period of approximately an hour
and believed to be from the same school.
Certainly the analytical
method is not suspect since the correlation for specific activities between tissues is high.
One cannot be positive that these
fish spent their entire life spans together and were thus exposed
to the same water masses, but assuming that they were,
there is
no evident explanation for the large variability that was found,
Blood and liver usually contained the highest concentrations
55
of
Log
.
Fe, but in the highly vascular dark muscle of the tuna the
levels were as high as they were in the liver.
some importance in future sampling,
This may be of
as concentrations decrease,
V
since it is often easier to obtain large samples of dark muscle
liver.
k
O
re
Vt
reported
°
.
(1965)
2
9
ctry
‘3
fat
19
cT
QQ
IH
™~
On
bey
Q
4
©
a
Folson and Young
fe
than of
a
60
a
Co concentration of
albacore from the North Poeee
got BB
ip