Data from: Additive genetic variation for tolerance to estrogen pollution in natural populations of Alpine whitefish (Coregonus sp., Salmonidae)
Brazzola, Gregory, University of Lausanne
Chèvre, Nathalie, University of Lausanne
Wedekind, Claus, University of Lausanne
Published Aug 19, 2014 on Dryad.
Cite this dataset
Brazzola, Gregory; Chèvre, Nathalie; Wedekind, Claus (2014). Data from: Additive genetic variation for tolerance to estrogen pollution in natural populations of Alpine whitefish (Coregonus sp., Salmonidae) [Dataset]. Dryad. https://doi.org/10.5061/dryad.md103
The evolutionary potential of natural populations to adapt to anthropogenic threats critically depends on whether there exists additive genetic variation for tolerance to the threat. A major problem for water-dwelling organisms is chemical pollution, and among the most common pollutants is 17α-ethinylestradiol (EE2), the synthetic estrogen that is used in oral contraceptives and that can affect fish at various developmental stages, including embryogenesis. We tested whether there is variation in the tolerance to EE2 within Alpine whitefish. We sampled spawners from two species of different lakes, bred them in vitro in a full-factorial design each, and studied growth and mortality of embryos. Exposure to EE2 turned out to be toxic in all concentrations we tested (≥1 ng/L). It reduced embryo viability and slowed down embryogenesis. We found significant additive genetic variation in EE2-induced mortality in both species, that is, genotypes differed in their tolerance to estrogen pollution. We also found maternal effects on embryo development to be influenced by EE2, that is, some maternal sib groups were more susceptible to EE2 than others. In conclusion, the toxic effects of EE2 were strong, but both species demonstrated the kind of additive genetic variation that is necessary for an evolutionary response to this type of pollution.
Brazzola et al. C. albellus
Mortality, time to hatching (day degrees), and hatchling body lenght (mm) and yolk sac volume (mm3) 1 and 10 days after hatching of whitefish (C. albellus) raised singly at one of several different concentrations of 17alpha-etinyloestradiol (EE2) or Fluconazole
Brazzola et al. C. palaea
Mortality and hatching time (day degrees) of whitefish (C. palaea) raised singly at one of different concentrations of 17alpha-ethinyloestradiol (EE2)