title: Comparison of the antioxidant defense system in Crassostrea rhizophorae and Crassostrea gigas exposed to domestic sewage discharges.
abstract: Oysters Crassostrea rhizophorae and Crassostrea gigas were kept for fourteen days at four sites in São José, SC, Brazil, chosen according to a sewage discharge contamination gradient. Enzymatic activities of CAT, GST, G6PDH and GR were evaluated in gills and digestive glands. Higher CAT activity was observed in tissues of C. rhizophorae in response to sewage contamination possibly indicating peroxisome proliferation induction. C. gigas showed elevated G6PDH activity in digestive gland, and GR in gills, after domestic sewage exposure. In conclusion, C. rhizophorae and C. gigas showed different biochemical responses after in situ exposure to domestic sewage. However, C. rhizophorae showed more significant changes in CAT suggesting that this organism could be a better monitor to this kind of effluent.
authors.affiliation: Laboratório de Biomarcadores de Contaminação Aquática e Imunoquímica, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.
authors.forename: Juliano
authors.initials: J
authors.lastname: Zanette
authors.forename: Fabrício Flores
authors.initials: FF
authors.lastname: Nunes
authors.forename: Igor Dias
authors.initials: ID
authors.lastname: Medeiros
authors.forename: Marília Nardelli
authors.initials: MN
authors.lastname: Siebert
authors.forename: Jacó Joaquim
authors.initials: JJ
authors.lastname: Mattos
authors.forename: Karim Hahn
authors.initials: KH
authors.lastname: Lüchmann
authors.forename: Cláudio Manoel
authors.initials: CM
authors.lastname: Rodrigues de Melo
authors.forename: Afonso Celso Dias
authors.initials: AC
authors.lastname: Bainy
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D049896:Crassostrea / Q000201:enzymology / Q000378:metabolism*; D004064:Digestive System / Q000201:enzymology; D004755:Enterobacteriaceae / Q000302:isolation & purification; D004781:Environmental Exposure; D005880:Gills / Q000201:enzymology; D012623:Seawater / Q000382:microbiology; D012722:Sewage / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D000975:Antioxidants; D012722:Sewage; D014874:Water Pollutants, Chemical