title: Baseline levels of oxidative stress biomarkers in species from a subtropical estuarine system (Paranaguá Bay, southern Brazil).
abstract: Offshore petroleum exploration has increased the risks of oil spills in coastal tropical and subtropical habitats. Monitoring tools are needed to assess and protect environmental health. We determined baseline values of antioxidant biomarkers (CAT, SOD, GPx, GST, MDA) for five ecologically relevant species in a subtropical system in southern Brazil. Regional baseline levels are compared with literature data as a basis to eventually test their efficacy as post-spill monitoring tools. Differences in the antioxidant response among species, contamination, and seasons were tested using univariate and multivariate analyses. The bivalves Anomalocardia flexuosa and Crassostrea rhizophorae and the catfish Genidens genidens emerge as suitable sentinel species. Seasonality is the main factor accounting for biomarkers variability, and not background contamination level. However, interactions between season and contamination level are also significant, indicating that biomarkers respond to complex environmental settings, a fact that needs to be fully understood for designing proper monitoring programs.
authors: Fram Centre, Akvaplan-niva, 9296 Tromsø, Norway; University of Tromsø, Faculty of Science, Faculty of Science and Technology, Department of Science & Safety, N-9037 Tromsø, Norway. Electronic address: ads@akvaplan.niva.no.
authors: Adriana E
authors: AE
authors: Sardi
authors: Fram Centre, Akvaplan-niva, 9296 Tromsø, Norway.
authors: Paul E
authors: PE
authors: Renaud
authors: Centro de Estudos do Mar, Universidade Federal do Paraná (UFPR), PO Box 61, 83255-000, Pontal do Paraná, Paraná, Brazil.
authors: Paulo
authors: P
authors: da Cunha Lana
authors: Fram Centre, Akvaplan-niva, 9296 Tromsø, Norway; University of Tromsø, Faculty of Science, Faculty of Science and Technology, Department of Science & Safety, N-9037 Tromsø, Norway.
authors: Lionel
authors: L
authors: Camus
mesh_terms: D000818:Animals; D061006:Bays; D015415:Biomarkers / Q000378:metabolism; D049872:Bivalvia; D001938:Brazil; D002397:Catfishes; D049896:Crassostrea; D004784:Environmental Monitoring; D063366:Estuaries; D018384:Oxidative Stress; D014874:Water Pollutants, Chemical
chemical_list: D015415:Biomarkers; D014874:Water Pollutants, Chemical
keywords: Antioxidant biomarkers; Brazil; Monitoring design; Multivariate analysis; Oil contamination; Tropical species