326
V. Rossi et a!.
Table 3. Gene frequencies for the most frequent allele at GPI
locus in the 3 studied sites and on different sampling dates.
Number of detectable individuals are reported in brackets
Date
Industrial
Power plant
Chioggia
Channel
outflow
Jun 97
0.889 (9)
0.977 (44)
Aug 97
1.000 (1)
0.927 (131)
0.905 (58)
Nov 97
0.920 (25)
0.962 (104)
0.990 (49)
Jan 98
0.933 (15)
0.963 (41)
1.000 (8)
Apr 98
0.833 (15)
0.988 (85)
0.938 (56)
Table 4. Mean overall GPI enzyme activity (Ulmg protein) in
homozygotes and heterozygotes for this locus
Genotype
Homozygote
Heterozygote
n
251
19
Mean
2.174
1.184
SD
1.399
0.866
Table S. Mean GPI enzyme activity (Ulmg protein) in
homozygotes for this locus from different sampling stations
Site
n
Mean
SD
Industrial Channel
33
1.947
1.141
Power plan outflow
171
2.399
1.453
Chioggia
47
1.518
1.127
4
3 •
:JI
.S
I-=:!:
..,
+'
g '2.
l2.
1
~
1 •
II
0
80
160
230
days
power plant outflow was constantly higher than
95%.
The GPI activity in homozygotes at this locus
was higher than in heterozygotes (F=9.23.
P
considering only the homozygotes, the dominant
genotype class, enzyme activity of GPI was different among stations (F=8.26, P
from the power plant outflow than from
Chioggia (Sheffe F-test= 4.31) (Table 5) (Fig. 3),
In general. GPI activity increases significantly
until up to 230 days from panel immersion
(January 1998). This relationship is well
described in organisms from the power plant
outflow where samples are more numerous
{F=26.58, P
homozygotes from the power plant outflow on different sampling dates
Date
n
Mean
SD
Aug 97
34
0.884
0.727
Nov 97
43
2.231
0.456
Jan 98
35
3.060
1.613
Apr 98
59
3.001
1.487
Site
OA
eB
l::.C
Fig. 3. Mean GPI enzyme
activity of homozygotes for
this locus from different
sampling sites, Industrial
::g[
Channel (A), power plant
outflow (B) and Chioggia (C)
~
in different sampling dates
310
after 80 (Aug 97), 160 (Nov
97), 230 (Jan 98) and 310
(Apr 98) days from panel
immersion
V. Rossi et a!.
Table 3. Gene frequencies for the most frequent allele at GPI
locus in the 3 studied sites and on different sampling dates.
Number of detectable individuals are reported in brackets
Date
Industrial
Power plant
Chioggia
Channel
outflow
Jun 97
0.889 (9)
0.977 (44)
Aug 97
1.000 (1)
0.927 (131)
0.905 (58)
Nov 97
0.920 (25)
0.962 (104)
0.990 (49)
Jan 98
0.933 (15)
0.963 (41)
1.000 (8)
Apr 98
0.833 (15)
0.988 (85)
0.938 (56)
Table 4. Mean overall GPI enzyme activity (Ulmg protein) in
homozygotes and heterozygotes for this locus
Genotype
Homozygote
Heterozygote
n
251
19
Mean
2.174
1.184
SD
1.399
0.866
Table S. Mean GPI enzyme activity (Ulmg protein) in
homozygotes for this locus from different sampling stations
Site
n
Mean
SD
Industrial Channel
33
1.947
1.141
Power plan outflow
171
2.399
1.453
Chioggia
47
1.518
1.127
4
3 •
:JI
.S
I-=:!:
..,
+'
g '2.
l2.
1
~
1 •
II
0
80
160
230
days
power plant outflow was constantly higher than
95%.
The GPI activity in homozygotes at this locus
was higher than in heterozygotes (F=9.23.
P
considering only the homozygotes, the dominant
genotype class, enzyme activity of GPI was different among stations (F=8.26, P
from the power plant outflow than from
Chioggia (Sheffe F-test= 4.31) (Table 5) (Fig. 3),
In general. GPI activity increases significantly
until up to 230 days from panel immersion
(January 1998). This relationship is well
described in organisms from the power plant
outflow where samples are more numerous
{F=26.58, P
homozygotes from the power plant outflow on different sampling dates
Date
n
Mean
SD
Aug 97
34
0.884
0.727
Nov 97
43
2.231
0.456
Jan 98
35
3.060
1.613
Apr 98
59
3.001
1.487
Site
OA
eB
l::.C
Fig. 3. Mean GPI enzyme
activity of homozygotes for
this locus from different
sampling sites, Industrial
::g[
Channel (A), power plant
outflow (B) and Chioggia (C)
~
in different sampling dates
310
after 80 (Aug 97), 160 (Nov
97), 230 (Jan 98) and 310
(Apr 98) days from panel
immersion