Antioxidant defense responses in Mytella guyanensis (Lamarck, 1819) exposed to an experimental diesel oil spill in Paranaguá Bay (Paraná, Brazil)

Joseane A. Marques, Helena C. Silva de Assis, Izonete C. Guiloski, Leonardo Sandrini-Neto, Renato S. Carreira, Paulo C. Lana

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We evaluated the effects of diesel oil on the bivalve Mytella guyanensis using biomarkers of oxidative stress (glutathione S-transferase, glutathione peroxidase, and reduced glutathione) after an experimental in situ spill in a mangrove area in southern Brazil. A linear model was developed for the Multiple Before-After Control-Impact (MBACI) experimental design to assess the significance of biological responses. Control and impacted sites were sampled seven and two days before as well as two and seven days after the spill. With the exception of a late response of reduced glutathione (GSH) levels on day seven, none of the biomarkers were significantly altered by the impact. This result was attributed to the high environmental variability of the experimental sites combined with a low sensitivity of Mytella guyanensis to diesel oil at short time-scales. The high resistance of M. guyanensis suggests that its antioxidant response is triggered only after a medium- to long-term exposure to contaminants.

Original languageEnglish
Pages (from-to)269-275
Number of pages7
JournalEcotoxicology and Environmental Safety
Volume107
DOIs
StatePublished - 1 Jan 2014
Externally publishedYes

Keywords

  • Diesel oil
  • Field experiment
  • Mytella guyanensis
  • Oxidative stress
  • Paranaguá bay

ASJC Scopus subject areas

  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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