Assuming, as these results indicate, that activities in
coarse and fine meshes do not differ,
fine should be unity.
the ratio of coarse to
The ratios in Table 9 were used to
determine variability on the wet as opposed to the ash basis.
On the ash basis, variance was only half as great as on the
wet basis, thus, ash is considered the better basis.
Con-
version to logarithms was necessary to normalize the skewed
(with peak toward the left) frequency distribution of the two
arrays of ratios.
10,0001°\_
Figure 12 shows
the decline for
MIKE CRATER
plankton samples at
6 localities on a
1000
wet weight basis
using the data of
Table 7, with the
two values for paired
,
tows averaged.
Except at the
from Table 1, with an
average for all locali-
ties combined of -1.96,
wet basis, and -1.74 on
the ash basis.
The
gradual decline (-1.0)
r
maintaining the activity
Vera
the
trend
is
At
too
;
,
WIDE PASSAGE
at the Mike crater could
be the result of continuous leaching of radioisotopes, from the crater
into the water, thereby
of the plankton.
/
an
°' |
“0
.
100
.
L,
1000 10
+
100
DAYS AFTER MAY 14,1954
poorly defined (P > 10%)
to permit comparisons.
DEEP ENTRANCE
—
-1.8 to -2.61 as seen
100
dsmx tO3 wat
Mike crater and Vera
the declines were
steep, ranging from
VERA
Fig. 12
L..
1000 10
4
;
100
.
1600