When the counting error is >100%, the concentration is
The + value is 1 o counting error.
reported as <2 0.
>21
7,72
6.1
<4.0
24.2+3,1
A
>94 mm
2,289 42,28
13.9 42.5
80—94 mm}
D
12.14#1,1
D
65—73 mm
0.72 +0.32
6.1
7.7
4.40 +406,90
33.8 +5.4
D
50—64 mm}
3,41 +0.90
39.6 +2.8
0~—49 mm
D
2. The activities in carp gastrointestinal tracts are much higher than in
carp bodies presumably due to sediment found in the gut.
3. It appears that there is little transfer of plutonium across intestinal
walis of carp into body tissues.
4, Crayfish collected downstream of Mound Laboratory show elevated
tevels of
Pu particularly in soft tissues as opposed to shell,
S.
Activities of 238py in crayfish tend to increase during an effluent pulse.
6. A size-dependent relationship may exist in crayfish with larger size
classes having lower activities per unit weight than smaller size classes
possibly due to the difference in relative surface area of the shell and
gills.
ACKNOWLEDGMENTS
The authors wish to thank W. H. Westendorf, D. G. Carfagno and R,
Robinson of Mound Laboratory for their cooperation; and J. R, Gammon and
C. Yoder of De Pauw University for providing us with several fish samples,
In addition, we wish to thank Argonne's Center for Educational Affairs for
supporting S. E. Groves under the Undergraduate Research Participation
Program.
(a)
6l24
ye? + 1l]
3,240.9
19
>8
<13.0
106 +8
204 + 8
12,9+1,9
27
9.7 +2,4
260 + 10
Tissue
239, 240.4
298/239 ' 240,
238,
u
238, /233 ' 240,
Shell
239,240),
238,
Sample
239,2
Distribution of 2385 and 39
4054 (FCi/g dry wt) (2! between shell and tissue of
crayfish as a function of individual length,
Table 5.
increase in 238py activity, apparently independent of their feeding be-
havior,
527