234
A.A. Martinez et al.
0
25
50
75
100
a
0
3
5
7
10
12
17
Treatment days
Accumulated mortality (%)
80 ppm
60 ppm
40 ppm
10 ppm
0.5
0.0
- 0.5
- 1.0
Probit
20
40
60
80
ppm
b
Fig. 20.2 (a) Cumulative lethality (percentage) as effect of short term tar exposure at different tar
concentrations. (b) Median lethal concentration of tar. Probit test
Discussion
Toxic and mutagenic effects of several PAHs species, as well as their relation
with the development of neoplastic diseases are reported in the literature (EPA
2010). However, few studies have been conducted to demonstrate induction of
these pathologies in the laboratory. Mytilus spp. is considered suitable as a sentinel
organism in marine environmental monitoring (Goldberg et al. 1978; Farrington