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Environmental Science and Pollution Research

, Volume 21, Issue 24, pp 13732–13743 | Cite as

Developmental toxicity of PAH mixtures in fish early life stages. Part II: adverse effects in Japanese medaka

  • Florane Le Bihanic
  • Christelle Clérandeau
  • Karyn Le Menach
  • Bénédicte Morin
  • Hélène Budzinski
  • Xavier Cousin
  • Jérôme CachotEmail author
PAHs and fish – Exposure monitoring and adverse effects – from molecular to individual level

Abstract

In aquatic environments, polycyclic aromatic hydrocarbons (PAHs) mostly occur as complex mixtures, for which risk assessment remains problematic. To better understand the effects of PAH mixture toxicity on fish early life stages, this study compared the developmental toxicity of three PAH complex mixtures. These mixtures were extracted from a PAH-contaminated sediment (Seine estuary, France) and two oils (Arabian Light and Erika). For each fraction, artificial sediment was spiked at three different environmental concentrations roughly equivalent to 0.5, 4, and 10 μg total PAH g−1 dw. Japanese medaka embryos were incubated on these PAH-spiked sediments throughout their development, right up until hatching. Several endpoints were recorded at different developmental stages, including acute endpoints, morphological abnormalities, larvae locomotion, and genotoxicity (comet and micronucleus assays). The three PAH fractions delayed hatching, induced developmental abnormalities, disrupted larvae swimming activity, and damaged DNA at environmental concentrations. Differences in toxicity levels, likely related to differences in PAH proportions, were highlighted between fractions. The Arabian Light and Erika petrogenic fractions, containing a high proportion of alkylated PAHs and low molecular weight PAHs, were more toxic to Japanese medaka early life stages than the pyrolytic fraction. This was not supported by the toxic equivalency approach, which appeared unsuitable for assessing the toxicity of the three PAH fractions to fish early life stages. This study highlights the potential risks posed by environmental mixtures of alkylated and low molecular weight PAHs to early stages of fish development.

Keywords

Developmental abnormalities Comet assay Micronucleus assay Larvae locomotion Oil extract Pyrolytic extract Medaka embryo-larval assay 

Abbreviations

PAH

Polycyclic aromatic hydrocarbon

BSD

Blue sac disease

dpf

Days post fertilization

MELAc

Medaka Embryo-Larval Assay with sediment contact exposure

dw

Dry weight

ERS

Egg rearing solution

ELS

Early life stages

MEM

Minimum Essential Medium

MN

Micronucleus

PY

Pyrolytic

HO

Heavy oil

LO

Light oil

TEF

Toxic equivalent factor

TEQ

Toxic equivalency

Notes

Acknowledgments

This study was funded by the French National Agency for Research’s “Contaminant, Ecosystème et santé” program, as part of the ConPhyPoP (2009–002) research project. It was also included in the LABEX COTE cluster of excellence for continental and coastal ecosystems. Following the project, Florane Le Bihanic received PhD fellowship from “Ministère de l’Enseignement Supérieur et de la Recherche”. The authors wish to thank CEDRE for providing oils, as well as Laure Landi for laboratory management.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Florane Le Bihanic
    • 1
  • Christelle Clérandeau
    • 1
  • Karyn Le Menach
    • 1
  • Bénédicte Morin
    • 1
  • Hélène Budzinski
    • 1
  • Xavier Cousin
    • 2
    • 3
  • Jérôme Cachot
    • 1
    Email author
  1. 1.UMR CNRS 5805 EPOCUniversity of BordeauxTalence CedexFrance
  2. 2.IFREMER, Ecotoxicology laboratoryL’HoumeauFrance
  3. 3.INRA LPGPRennesFrance

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