Interactive effects of 3,4-DCA and temperature on the annual killifish Nothobranchius furzeri

Charlotte Philippe, Pauline Hautekiet, Arnout F. Grégoir, Eli S.J. Thoré, Luc Brendonck, Gudrun De Boeck, Tom Pinceel

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

Although aquatic organisms are increasingly exposed to pollutants and abnormally high temperatures as a consequence of climate change, interactive effects between those stressors remain poorly assessed. Especially in ectotherms, such as fish, increases in ambient temperature are expected to affect fitness-related traits and physiology. We used the turquoise killifish Nothobranchius furzeri to study the effects of a range of 3,4-dichloroaniline concentrations (0, 50, 100 μg/L) in combination with two temperature conditions (control and control +4 °C) during four months of exposure. As part of an integrated multi-level approach, we quantified effects on classic life history traits (size, maturation time, body mass, fecundity), critical thermal maximum and physiology (energy reserves and stress-associated enzymatic activity). While no interactive effects of 3,4-DCA exposure and increased temperature emerged, our results do show a negative effect of 3,4-DCA on thermal tolerance. This finding is of particular relevance in light of increasing temperatures under climate change. Due to increases in pest species and faster degradation of 3,4-DCA under higher temperatures, increased use of the pesticide is expected under climate change which, in turn, could result in a decreased tolerance of aquatic organisms to high temperatures.

langue originaleAnglais
Pages (de - à)146-153
Nombre de pages8
journalAquatic Toxicology
Volume212
Les DOIs
Etat de la publicationPublié - juil. 2019
Modification externeOui

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