Comparison of the antioxidant defense system in Crassostrea rhizophorae and Crassostrea gigas exposed to domestic sewage discharges.
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.
Zanette
Juliano
J
Laboratório de Biomarcadores de Contaminação Aquática e Imunoquímica, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.
Nunes
Fabrício Flores
FF
Medeiros
Igor Dias
ID
Siebert
Marília Nardelli
MN
Mattos
Jacó Joaquim
JJ
Lüchmann
Karim Hahn
KH
Rodrigues de Melo
Cláudio Manoel
CM
Bainy
Afonso Celso Dias
AC
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*
D000975:Antioxidants; D012722:Sewage; D014874:Water Pollutants, Chemical