0.01
0.03
0.1
0.3
1
3
10
0
5
10
15
20
25
30
35
40
Marnay-sur-Seine
Bougival
A
Sediment June 2012 (g/L)
sediment
water
EEQ
ng E2-eq/g ng E2-eq/L
Triel-sur-Seine
2.10
Bougival
0.20
Marnay-sur-Seine
0.10
0.01
0.03
0.1
0.3
1
3
10
0
5
10
15
20
25
30
35
40
June 2012
December 2012
September 2011
B
EEQ
1.95
2.10
0.32
0.30
0.32
0.50
Triel-sur-Seine
Estrogenic activity
Sediment Triel-sur-Seine (g/L)
Estrogenic activity
December 2012
September 2011
June 2012
sediment
water
ng E2-eq/g ng E2-eq/L
1.95
0.87
0.0005
Fig. 1 Spatial (a, for June 2012 samples) and temporal (b, for Triel-sur-Seine samples) variation of
the oestrogenic potential in sediments (in g/L of culture medium in the MELN bioassay) collected
from the Seine River in September 2011, June 2012 and December 2012 at Marnay-sur-Seine,
Bougival and Triel-sur-Seine. Graph data correspond to mean Æ SEM of one experiment repeated
three times. Insert data represent EEQ values in ng E2-eq/g and in ng E2-eq/L of the dissolved phase
of water samples collected at the same time
Experience Gained from Ecotoxicological Studies in the Seine River and. . .
249