Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 424494
Title Toxic concentrations in fish early life stages peak at a critical moment
Author(s) Foekema, E.M.; Fischer, A.; Lopez Parron, M.; Kwadijk, C.; Vries, P. de; Murk, A.J.
Source Environmental Toxicology and Chemistry 31 (2012)6. - ISSN 0730-7268 - p. 1381 - 1390.
Department(s) IMARES Milieu
Sub-department of Toxicology
Alterra - Centre for Water and Climate
IMARES Maritiem
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) medaka oryzias-latipes - organochlorine compounds - aquatic organisms - maternal transfer - risk-assessment - pcb congeners - exposure - accumulation - substances - bioaccumulation
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.
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