CESIMAR - CENPAT   25625
CENTRO PARA EL ESTUDIO DE SISTEMAS MARINOS
Unidad Ejecutora - UE
artículos
Título:
Metals from mine waste as potential cause of oxidative stress in burrowing crab Neohelice granulata from San Antonio bay
Autor/es:
ERICA GIARRATANO; GABRIELA MALANGA; MÓNICA N. GIL; CARMEN H. MARINHO
Revista:
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Amsterdam; Año: 2016 vol. 132 p. 68 - 76
ISSN:
0147-6513
Resumen:
The Natural Protected Area San Antonio bay isof particular importance for its congregation of migratory shorebirds and it hasbeen declared one of the Western Hemisphere Shorebird Reserve NetworkInternational site (WHSRN). Present study represents the first assessment ofvariation on oxidative stress biomarkers in male crab Neohelice granulata from San Antonio bay (Río Negro, Argentina)under field conditions, associated mainly to metal contamination coming frompassive mining wastes. Three sites were sampled once every three months fromNovember 2012 to August 2013 within this sea inlet (Pile, Fishery and Port) anda control site at the southeast of the bay (Punta Perdices). Accumulation ofNi, Zn, Cr and Al varied only with seasons although without a constant trend,meanwhile Cd, Cu and Pb also varied among sites being highest in Pile and Port.Biochemical results indicated that variations in catalase activity was onlysite specific being maximum in Pile; meanwhile lipid radical, α-tocopherol andmetallothioneins were only seasonal specific being higher in autumn and winter.Seasonal variation was also found for total thioles, being the content higher insummer and autumn than in winter. Correlation analysis revealed that malondialdehydeand α-tocopherol have a positive association with Al and negative with Ni,meanwhile GST has a positive association with Fe. Crabs from the closest areato the waste pile did not exhibit a differentiated oxidative pressure despitethe higher accumulation of metals. It is possible that crabs from contaminatedareas have developed a tolerance to metals, indicating a strongecotoxicological selective pressure. More studies are needed to assess whetherthere is a transfer of metals through the food chain.