Toxic concentrations in fish early life stages peak at a critical moment

E.M. Foekema, A. Fischer, M. Lopez Parron, C. Kwadijk, P. de Vries, A.J. Murk

Research output: Contribution to journalArticleAcademicpeer-review

21 Citations (Scopus)

Abstract

During the development of an embryo into a juvenile, the physiology and behavior of a fish change greatly, affecting exposure to and uptake of environmental pollutants. Based on experimental data with sole (Solea solea), an existing bioaccumulation model was adapted and validated to calculate the development of concentrations of persistent organic pollutants in the tissue of developing fish. Simulation revealed that toxic tissue concentrations of pollutants with log octanol–water partition ratio (KOW)¿>¿5 peak at the moment when the larvae become free-feeding, when the lipid reserves are depleted. This may explain the delayed effects observed in fish early-life-stage experiments with exposed eggs. In the field, eggs can be exposed through maternal transfer to adult pollutant tissue concentrations, which will increase in the larva to peak tissue concentrations, exceeding those of the adult fish. The results demonstrate the risk of underestimating the effects of lipophilic persistent organic pollutants with log KOW¿>¿5 in short-term, early-life-stage fish tests and underscore the importance of maternal transfer as an exposure route in the field situation.
Original languageEnglish
Pages (from-to)1381-1390
Number of pages10
JournalEnvironmental Toxicology and Chemistry
Volume31
Issue number6
DOIs
Publication statusPublished - 2012

Keywords

  • medaka oryzias-latipes
  • organochlorine compounds
  • aquatic organisms
  • maternal transfer
  • risk-assessment
  • pcb congeners
  • exposure
  • accumulation
  • substances
  • bioaccumulation

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