Autopsy data showed tho following to be significantly cor¬ 
related with death at one or more stations (see Table 7 for a 
presentation of these data); fungus on body or fins; watery fat 
in the mesentery and on the surface of the intestines; foreign 
material on the gill surface; and hard, white crystalline nodules 
attached to the body or fins. Comparing stations for frequency 
of occurrence of each of these characteristics using nonsurvivors 
only showed that no location had significantly higher or lower 
frequency of watery mesenteric fat; Campbell Upstream and Camp¬ 
bell Downstream had significantly higher frequency of occurrence 
of fungus; the Control Station showed a significantly higher fre¬ 
quency of foreign material (apparently silt) on the gills and 
Sewage plant, Tenneco Pond and Campbell Downstream showed sig¬ 
nificantly higher frequency of white nodules. See Table 8 for 
levels of significance of these characteristics. 
TABLE 7. 
RELATIONSHIP OF 
NONSURVIVAL 
TO AUTOPSY 
DATA* 
Station 
Fungus 
White 
nodules 
Foreign 
material 
on gills 
Watery 
mesenteric 
fat 
Control 
N.C. t 
N.C. t 
0.05 
0.05 
Campbell Upstream 
0.005 
N.C.t 
N.S. 
N.S. 
Campbell Downstream 
0.005 
N.S. 
N.S. 
N.S. 
Tenneco Pond 
N.S. 
N.S. 
0.05 
N.S. 
Tenneco Downstream 
0.05 
N.S. 
N.S. 
N.S. 
Sewage Plant 
N.S. 
0.01 
N.S. 
0.01 
Numbers are probability values calculated using contingency 
analysis. N.S. indicates that probability was greater than 
0.5. 
t 
Not calculable because of zero expected values. 
34 
