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Volume 10, September

J. Xenobiot., Volume 10, Issue 2 (December 2020) – 2 articles

Cover Story (view full-size image): Flounders collected in the heavily polluted Seine estuary were compared with those collected from the moderately polluted Bay of Douarnenez. The muscle energetic reserves were highly depleted in Seine fish when compared to Douarnenez fish. The Seine fish displayed (1) a reduced capacity to manage oxidative stress, (2) a higher energetic metabolism, and (3) an increase in the content of muscle membrane phospholipids. The data integration allowed relationships to be hypothesised between membrane phospholipids, xenobiotic metabolism, bioenergetics, and antioxidant defence. The genetic diversity considering neutral markers was maintained in the heavily polluted Seine population compared with the Douarnenez population. The high physiological cost of tolerance to toxicants in the Seine flounder population could compromise its capacity to respond in the future to an additional stressor like [...] Read more.
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Open AccessEditorial
Significance of Environmental Input Data in Risk Assessment Analyses
J. Xenobiot. 2020, 10(2), 36-38; https://0-doi-org.brum.beds.ac.uk/10.3390/jox10020005 - 21 Dec 2020
Viewed by 352
Abstract
The environment is becoming more and more polluted [...] Full article
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Open AccessFeature PaperArticle
An Integrated Biomarker Approach Using Flounder to Improve Chemical Risk Assessments in the Heavily Polluted Seine Estuary
J. Xenobiot. 2020, 10(2), 14-35; https://0-doi-org.brum.beds.ac.uk/10.3390/jox10020004 - 27 Oct 2020
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Abstract
The objective of this study was to develop an integrative approach in ecotoxicology (from biomarkers to population genetics) to assess the ecological status of fish populations. Flounders (Platichthys flesus) collected after the spawning season in the heavily polluted Seine estuary were [...] Read more.
The objective of this study was to develop an integrative approach in ecotoxicology (from biomarkers to population genetics) to assess the ecological status of fish populations. Flounders (Platichthys flesus) collected after the spawning season in the heavily polluted Seine estuary were compared with the moderately polluted Bay of Douarnenez. The muscle energetic reserves were highly depleted in Seine vs. Douarnenez fish. The Seine fish displaying a reduced capacity to manage the oxidative stress and a higher energetic metabolism. An increase in the content of muscle membrane phospholipids (sphingomyelin, phosphatidylserine, free sterols) was detected in the Seine vs. Douarnenez fish. The data integration allowed to hypothesize relationships between membrane phospholipids, xenobiotic metabolism, bioenergetics, and antioxidant defence. The genetic diversity considering neutral markers was maintained in the heavily polluted Seine population compared with the Douarnenez population. Finally, we suggest that the high physiological cost of tolerance to toxicants in the Seine flounder population could compromise its capacity to respond in the future to an additional stressor like warming waters in shallow depth. Thus, this population could be submitted to an ecological risk. Full article
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