Bibliothèque Électronique Lac Saint-Pierre

Biological markers to establish a relationship between the health status of the St. Lawrence River yellow perch (Perca flavescens) with a gradient of anthropogenic disturbances

Landry, C. et Houde, M. et Brodeur, P. et Boily, M. (2020). Biological markers to establish a relationship between the health status of the St. Lawrence River yellow perch (Perca flavescens) with a gradient of anthropogenic disturbances. Science of the Total Environment . p. 138515. DOI: 10.1016/j.scitotenv.2020.138515.

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Résumé

Since the mid-1990s, the decline of the yellowperch population of Lake Saint-Pierre (hereinafter LSP) in Quebec, Canada has been the subject of several research programs. The combined effect of habitat deterioration, the presence of invasive species, and poor water quality negatively affected the yellow perch population in this lake. In 2013, we sampled yellow perch (larvae, juveniles and adults) at six sites along the St. Lawrence River representing a gradient of increasing human influences from upstream to downstream and measured several biomarkers including retinoid compounds (vitamin A). In the most contaminated sites (LSP, north and south shores), we found that retinoid stores were decreased in all three stages of development. To corroborate these results and to test other biomarkers, we once again sampled yellow perch (adults only) from the same sites. Results fromour 2014 and 2015 samplings confirmed that LSP yellowperch appeared to be at a disadvantage compared to fish fromupstream populations. Individuals fromLSP have lower acetylcholinesterase (AChE) activity as well as lower retinoid levels in liver and plasma. These fishwere also marked by lower levels of antioxidants such as lycopene and vitamin E. A discriminant analysis of this set of results confirmed that the yellowperch of the LSP could be easily discriminated from those of the other sites (2014 and 2015) on the basis of liver retinoid and, to a lesser extent, of the liver tocopherol and protein concentration of the muscle, as well as AChE activity and DROH (all-trans-3,4-dehydroretinol) measured in plasma.

Type de document: Article scientifique
Statut du texte intégral: Autre
Mots-clés libres: Biomarkers, Retinoids, AChE, Tocopherol, Lycopene, Pesticides, Discriminant analysis
Sujets: 4. Faune > 4.2. Poisson
5. Aménagements > 5.2. Conservation de l’habitat
8. Impacts et monitoring > 8.1. Qualité de l’eau
8. Impacts et monitoring > 8.4. Population de perchaude
9. Nouvelles pressions > 9.2. Espèce de poisson exotique
Date de dépôt: 15 avr. 2021 13:39
Dernière modification: 15 avr. 2021 13:39
URI: http://belsp.uqtr.ca/id/eprint/1494

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