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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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Effects of persistent organic pollutants on the thyroid function of the European sea bass (Dicentrarchus labrax) from the Aegean sea, is it an endocrine disruption? Schnitzler, J.G.; Koutrakis, E.T.; Siebert, U.; Thomé, J.-P.; Das, K. (2008). Effects of persistent organic pollutants on the thyroid function of the European sea bass (Dicentrarchus labrax) from the Aegean sea, is it an endocrine disruption? Mar. Pollut. Bull. 56(10): 1755-1764. dx.doi.org/10.1016/j.marpolbul.2008.06.011 In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 141564 [ download pdf ]

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Trefwoorden

Aquaculture Biological phenomena > Accumulation > Bioaccumulation Biology > Histology Chemical compounds > Arsenic compounds Chemical compounds > Halogen compounds > Chlorine compounds Chemical compounds > Organic compounds > Hydrocarbons > Halogenated hydrocarbons > Chlorinated hydrocarbons > DDT Diseases > Organic diseases > Diseases > Endocrine diseases Endocrine systems Hormones > Thyroid hormones Morphometry Persistence Pollution Pollution Polychlorinated biphenyls Sea bass Secretory organs > Glands > Endocrine glands > Thyroid Secretory products > Hormones Vertebrates > Fishes > Osteichthyes > Perciformes > Serranidae > Marine fishes > Sea bass Water pollution effects Dicentrarchus labrax (Linnaeus, 1758) [WoRMS]; Serranidae Swainson, 1839 [WoRMS] MED, Egeïsch [Marine Regions] Marien/Kust

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Auteurs		Top
Schnitzler, J.G., meer Koutrakis, E.T., meer Siebert, U.	Thomé, J.-P., meer Das, K., meer

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Abstract

We evaluated the alterations of organochlorinated compounds such as polychlorobiphenyls (PCB), dichloro-diphenyl-dichloroethylene (DDE) and dichloro-diphenyl-trichloroethane (DDT) on the thyroid in wild and cultured sea bass (Dicentrarchus labrax) at environmental concentrations. These compounds influence the endocrine system of many fish species and are qualified as endocrine disruptors. The thyroid seems to be a target organ. Two alteration endpoints: the thyroid histology and the muscular thyroid hormone concentrations, were used simultaneously. High concentrations in PCBs and DDT were detected in muscles, supporting the idea that the Mediterranean fauna could be more polluted than the Atlantic fauna. The high abundance of DDE indicates a progressive degradation of remnant DDT load and the absence of new inputs in this area. Aquaculture sea bass shows a significant higher amount of pollutants on fresh weight basis (especially PCBs) in their muscles compared to the wild sea bass. Those differences may be related mainly to the contaminations of diet. Thyroid parameters vary between wild and aquaculture sea bass, wild sea bass were characterized by higher follicle diameters, epithelial cell heights and muscular T4 concentrations. A significant relationship between persistent organic pollutants (muscular PCBs and DDT concentration) and the different thyroid parameters (diameters of follicles, epithelial cell heights and muscular T4 levels) could be observed, which support the hypothesis that these compounds have an adverse impact on thyroid morphometry and function.

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