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    Dispersed oil decreases the ability of a model fish (Dicentrarchus labrax) to cope with hydrostatic pressure

    Access Status
    Fulltext not available
    Authors
    Dussauze, M.
    Pichavant-Rafini, K.
    Belhomme, M.
    Buzzacott, Peter
    Privat, K.
    Le Floch, S.
    Lemaire, P.
    Theron, M.
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Dussauze, M. and Pichavant-Rafini, K. and Belhomme, M. and Buzzacott, P. and Privat, K. and Le Floch, S. and Lemaire, P. et al. 2017. Dispersed oil decreases the ability of a model fish (Dicentrarchus labrax) to cope with hydrostatic pressure. Environmental Science and Pollution Research. 24 (3): pp. 3054-3062.
    Source Title
    Environmental Science and Pollution Research
    DOI
    10.1007/s11356-016-7955-8
    ISSN
    0944-1344
    School
    School of Nursing, Midwifery and Paramedicine
    URI
    http://hdl.handle.net/20.500.11937/71989
    Collection
    • Curtin Research Publications
    Abstract

    © 2016, Springer-Verlag Berlin Heidelberg. Data on the biological impact of oil dispersion in deep-sea environment are scarce. Hence, the aim of this study was to evaluate the potential interest of a pressure challenge as a new experimental approach for the assessment of consequences of chemically dispersed oil, followed by a high hydrostatic pressure challenge. This work was conducted on a model fish: juvenile Dicentrarchus labrax. Seabass were exposed for 48 h to dispersant alone (nominal concentration (NC) = 4 mg L-1), mechanically dispersed oil (NC = 80 mg L-1), two chemically dispersed types of oil (NC = 50 and 80 mg L-1with a dispersant/oil ratio of 1/20), or kept in clean seawater. Fish were then exposed for 30 min at a simulated depth of 1350 m, corresponding to pressure of 136 absolute atmospheres (ATA). The probability of fish exhibiting normal activity after the pressure challenge significantly increased from 0.40 to 0.55 when they were exposed to the dispersant but decreased to 0.26 and 0.11 in the case of chemical dispersion of oil (at 50 and 80 mg L-1, respectively). The chemical dispersion at 80 mg L-1also induced an increase in probability of death after the pressure challenge (from 0.08 to 0.26). This study clearly demonstrates the ability of a pressure challenge test to give evidence of the effects of a contaminant on the capacity of fish to face hydrostatic pressure. It opens new perspectives on the analysis of the biological impact of chemical dispersion of oil at depth, especially on marine species performing vertical migrations.

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