title: Responses of juvenile European flounder (Platichthys flesus) to multistress in the Vilaine estuary, during a 6-month survey.
abstract: 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.
authors.affiliation: CEDRE, rue Alain Colas, CS 41836, 29218 Brest Cedex 2, France.
authors.forename: Estérine
authors.initials: E
authors.lastname: Evrard
authors.forename: Alain
authors.initials: A
authors.lastname: Devaux
authors.forename: Sylvie
authors.initials: S
authors.lastname: Bony
authors.forename: Jérôme
authors.initials: J
authors.lastname: Cachot
authors.forename: Grégory
authors.initials: G
authors.lastname: Charrier
authors.forename: Louis
authors.initials: L
authors.lastname: Quiniou
authors.forename: Jean
authors.initials: J
authors.lastname: Laroche
mesh_terms: D000251:Adenosine Triphosphatases / Q000235:genetics; D000367:Age Factors; D000818:Animals; D001057:Apolipoproteins E / Q000235:genetics; D050940:Betaine-Homocysteine S-Methyltransferase / Q000235:genetics; D049628:Body Size; D020552:Comet Assay; D004249:DNA Damage; D063366:Estuaries; D005068:Eutrophication; D005432:Flounder / Q000235:genetics / Q000502:physiology*; D005602:France; D005786:Gene Expression Regulation; D014644:Genetic Variation; D005828:Genetics, Population; D008099:Liver / Q000502:physiology; D018807:Polymorphism, Single-Stranded Conformational; D013312:Stress, Physiological; D014876:Water Pollution
chemical_list: D001057:Apolipoproteins E; C040661:apolipoprotein E1; D050940:Betaine-Homocysteine S-Methyltransferase; D000251:Adenosine Triphosphatases