Biochemical and behavioral responses in the estuarine polychaete Perinereis gualpensis (Nereididae) after in situ exposure to polluted sediments

Mauricio Díaz-Jaramillo, Alessandra Martins da Rocha, Gustavo Chiang, David Buchwalter, José M. Monserrat, Ricardo Barra

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

In situ translocation experiments are advantageous relative to traditional laboratory experiments, particularly for understanding the bioavailability of trace metals like mercury (Hg). Individuals of the polychaete Perinereis gualpensis were translocated from a reference site (Raqui estuary, Chile) to an estuarine site with significant sediment Hg concentrations (Lenga estuary: 1.78-9.89. mg/kg). Individuals were exposed in polluted and non-polluted sediments for 21 days and sampled every 7 days with cages deployed at three different depths. Tissue Hg concentrations were measured in conjunction with oxidative stress responses. Translocated polychaetes rapidly accumulated Hg. Glutathione S-transferase (GST) activities measured from posterior body regions were 2-fold higher than control activities after 21 days of exposure. Other antioxidant measures were idiosyncratic. Distinct burrowing behavior differences were observed; control polychaetes exhibited more homogenous vertical distributions, whereas in Lenga, worms tended to remain in upper layers. These studies demonstrate that under natural conditions, Hg is highly bioavailable to polychaetes affecting both biochemical and behavioral responses after relatively short-term exposure.

Original languageEnglish
Pages (from-to)182-188
Number of pages7
JournalEcotoxicology and Environmental Safety
Volume89
DOIs
Publication statusPublished - 1 Mar 2013
Externally publishedYes

Keywords

  • Behavioral responses
  • Glutathione S-transferase
  • In situ
  • Mercury
  • Perinereis gualpensis

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Biochemical and behavioral responses in the estuarine polychaete Perinereis gualpensis (Nereididae) after in situ exposure to polluted sediments'. Together they form a unique fingerprint.

Cite this