Oxidative Stress in a Wild Population of the Freshwater Fish Hyphessobrycon Luetkenii Chronically Exposed to a Copper Mining Area: New Insights into Copper Toxicology

• Published in: Bulletin of environmental contamination and toxicology 2023-04, Vol.110 (4), p.77-77, Article 77
• Main Authors: Borges, Vinícius Dias, Zebral, Yuri Dornelles, Costa, Patrícia Gomes, da Silva Fonseca, Juliana, Klein, Roberta Daniele, Bianchini, Adalto
• Format: Article
• Language: English
• Subjects: Abnormalities; Adaptation; Animals; Aquatic Pollution; Biomarkers; Carbonyls; Characidae - metabolism; Copper; Copper - metabolism; Copper - toxicity; Creeks; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Erythrocytes; Fish; Fish populations; Fresh Water; Freshwater fish; Gills; Gills - metabolism; Heavy metals; Lipid Peroxidation; Lipids; Liver; Liver - metabolism; Metabolism; Mining; Muscles; Oxidative Stress; Peroxidation; Physiology; Pollution; Proteins; Soil Science & Conservation; Toxicology; Waste Water Technology; Water Management; Water Pollutants, Chemical - metabolism; Water Pollutants, Chemical - toxicity; Water Pollution Control
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s00128-023-03721-9

In this study, we examine markers of oxidative stress in the tetra Hyphessobrycon luetkenii collected from two locations in the copper contaminated João Dias creek (southern Brazil). Also, specimens were translocated from a clean reference section of the creek to a polluted stretch and vice-versa. Fish were held at in submerged cages for 96 h and then sacrificed. Nuclear abnormalities in erythrocytes and total antioxidant capacity, lipid peroxidation and protein carbonylation in gills, brain, liver and muscle displayed similar trends in both groups. Lipid peroxidation increased in all tissues of individuals translocated to the polluted site but only in liver and muscle of those translocated to the reference site. Increased protein carbonylation was also observed in gills of individuals translocated to the reference location. These results suggest similar oxidative stress among fish from the reference and polluted locations and that long-term metals exposure may require adaptations toward oxidative stress responses.