Bibliothèque Électronique Lac Saint-Pierre

Lipophilic antioxidants and lipid peroxidation in yellow perch subjected to various anthropogenic influences along the St. Lawrence River (QC, Canada)

Landry, C. et Houde, M. et Brodeur, P. et Spear, P. et Boily, M. (2017). Lipophilic antioxidants and lipid peroxidation in yellow perch subjected to various anthropogenic influences along the St. Lawrence River (QC, Canada). Ecotoxicology and Environmental Safety (139). pp. 316-325. DOI: 10.1016/j.ecoenv.2017.01.051.

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In Lake Saint-Pierre (LSP), the last great widening of the St. Lawrence River (province of Québec, Canada), the yellow perch has been experiencing a significant decline since the mid-1990s. The combined effect of several stressors (deterioration of habitats appropriate for reproduction and growth, invasive species and poor water quality) seems to exert considerable influence on the yellow perch population in LSP, characterized by low recruitment. To better understand possible stressor effects at the biochemical level, LSP yellow perch were compared with other sites along a gradient of increasing human influences from upstream to downstream along the St. Lawrence River. Morphometry (size, weight, circumference and Fulton's condition factor) and biomarkers associated to the peroxidation of lipids, lipophilic antioxidants (α-tocopherol and carotenoids), along with retinoids (vitamins A1 and A2) and proteins were compared between sites at the larval, juvenile and adult stages. Fulton's condition factor was similar between sites for juveniles but was significantly lower in LSP adults, suggesting a weakened physiological condition. In most contaminated sites as LSP, lipid peroxidation tended to be higher in juveniles and adults whereas the lipophilic antioxidant lycopene and proteins content were lower. Retinyl esters were significantly lower for LSP fish compared to other sites, not only in larvae but also in the livers of juveniles and adults. These results are consistent with possible altered metabolism in the retinoid system of LSP yellow perch. The overall results reflect the "pressure" gradient tested, where the yellow perch from the most affected sites located downstream had impaired physiological and biochemical conditions compared to the upstream sectors.

Type de document: Article scientifique
Statut du texte intégral: Autre
Mots-clés libres: Biomarkers, Carotenes, HPLC, Retinoids, TBARS, Tocopherol, Xanthophylls
Sujets: 4. Faune > 4.2. Poisson
8. Impacts et monitoring > 8.1. Qualité de l’eau
8. Impacts et monitoring > 8.2. Études de suivi
8. Impacts et monitoring > 8.4. Population de perchaude
Date de dépôt: 19 avr. 2017 15:47
Dernière modification: 08 nov. 2018 21:01

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Concepteur de la BELSP : André Barabé, Ph. D.