Dépôt numérique

Metal effects on fathead minnows (Pimephales promelas) under field and laboratory conditions.

Gauthier, Charles, Couture, Patrice et Pyle, Greg G. (2006). Metal effects on fathead minnows (Pimephales promelas) under field and laboratory conditions. Ecotoxicology and Environmental Safety , vol. 63 , nº 3. p. 353-364. DOI: 10.1016/j.ecoenv.2005.03.019.

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The consequences of low-level metal exposure to early life stages of fathead minnows (Pimephales promelas) were investigated along a contamination gradient near Sudbury, Canada. Field exposures resulted in elevated hatching time and increased mortality in metal-contaminated lakes, in contrast to laboratory exposures where no effects were observed. Dissolved and ionic Cd and Ni were associated with changes in hatching time and larval mortality under field conditions, though other potential contaminants were not examined and may also have had an influence. The increased biological response of field-exposed fish, relative to fish exposed to the same water in laboratory conditions, may be the result of higher stress in natural environments, which could sensitize fish to contaminants. Analysis also indicated that, as contamination increases, the discrepancies between laboratory and field estimates of effect also increase. A temperature versus hatching time relationship was also quantified for fathead minnows.

Type de document: Article
Mots-clés libres: Pimephales promelas; lab to field extrapolation; stress; metals; cadmium; nickel; sudbury; early life stages; toxicity testing
Centre: Centre Eau Terre Environnement
Date de dépôt: 08 janv. 2021 19:14
Dernière modification: 08 janv. 2021 19:14
URI: https://espace.inrs.ca/id/eprint/10966

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