Toxic effects of antiparasitic pesticides used by the salmon industry in the marine amphipod Monocorophium insidiosum

Felipe Tucca, Mauricio Díaz-Jaramillo, Gabriel Cruz, Jeannette Silva, Enrique Bay-Schmith, Gustavo Chiang, Ricardo Barra

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

The use of antiparasitic pesticides (APs) has been widely required by the salmon industry to treat diseases. The direct emission of chemicals in the seawater has produced uncertainty about the potential effects on non-target organisms, such as crustaceans. The aim of this study was to assess the toxicity of three APs used by the salmon farm industry, such as emamectin benzoate (EB), cypermethrin (CP), and deltamethrin (DE), in the amphipod Monocorophium insidiosum during 10 days through whole-sediment bioassay tests. Lethal concentration by 50% (LC50-10d) and biochemical responses, such as glutathione S-transferase (GST) and thiobarbituric acid reactive substances (TBARS), were measured as exposure and effects end points, respectively. Acute assays for DE (7.8 μg kg-1, confidence interval, CI95% 5-11) and CP (57 μg kg-1, CI95% 41-77) showed more mortality than EB (890 μg kg-1, CI95% 672-1,171). In this study, it was possible to observe sublethal responses in amphipods after 2 days of exposure to APs. Significant induction in GST and TBARS (p < 0.05) were measured for CP and EB. Lower DE concentrations showed no significant biochemical responses. M. insidiosum was sensitive to AP concentrations at μg kg-1 in sediments. This information would allow considering the possible consequences of detected concentrations for APs in areas with intensive salmon farming activity.

Original languageEnglish
Pages (from-to)139-148
Number of pages10
JournalArchives of Environmental Contamination and Toxicology
Volume67
Issue number2
DOIs
Publication statusPublished - Aug 2014
Externally publishedYes

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

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