Avoidance behaviour and toxicological impact of sunscreens in the teleost Chelon auratus
Comportement d'évitement et impact toxicologique de crèmes solaires chez le téléoste Chelon Auratus
Résumé
There is increasing evidence that sunscreen, more specifically the organic ultraviolet filters (O-UVFs), are toxic for aquatic organisms. In the present study, we simulated an environmental sunscreen exposure on the teleost fish, Chelon auratus. The first objective was to assess their spatial avoidance of sunscreen products. Our results showed that the fish did not avoid the contaminated area. Therefore, the second objective was to evaluate the toxicological impacts of such pollutants. At the individual level, O-UVFs increased the hepatosomatic index which suggests pathological alterations of the liver. At the cellular level, a significant increase of malondialdehyde was measured in the muscle of fish exposed to O-UVFs which suggests a failure of antioxidant defences and/or an excess 2 of reactive oxygen species. Although our study highlighted some of the toxicological effects due to O-UVFs contamination, further investigations are needed for a better understanding of the impact of these contaminants upon marine teleosts.
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