Responses of juvenile European flounder (Platichthys flesus) to multistress in the Vilaine estuary, during a 6-month survey - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Environmental Science and Pollution Research Année : 2013

Responses of juvenile European flounder (Platichthys flesus) to multistress in the Vilaine estuary, during a 6-month survey

Résumé

Physiological and genetic responses of age 0+ Platichthys flesus were investigated in the eutrophicated and moderately contaminated Vilaine estuary, during a 6-month survey. The main objective of this study was to explore the biological responses of fishes during their juvenile period in an estuarine system in order to detect a possible selective pressure induced by the environmental stress. Our results showed a general convergence in physiological responses along the survey: an increase in genotoxicity was associated with an increase in mRNA expression of ATPase and betaine homocysteine methyltransferase. These results could suggest an increase of cellular damage, energetic request, and detoxification rate related to the growing exposure time to stress. Considering the aging of the cohort, the genetic characteristics of the Vilaine flounder cohort came closer to the one observed in a highly stressed system, the Seine estuary, suggesting a potential selective pressure mainly induced by the chemical stress.

Dates et versions

halsde-00946804 , version 1 (14-02-2014)

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Estérine Evrard, Alain Devaux, Sylvie Bony, Jerome Cachot, Grégory Charrier, et al.. Responses of juvenile European flounder (Platichthys flesus) to multistress in the Vilaine estuary, during a 6-month survey. Environmental Science and Pollution Research, 2013, 20 (2), pp.676-689. ⟨10.1007/s11356-012-1138-z⟩. ⟨halsde-00946804⟩
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