Article (Scientific journals)
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, Joseph; Koutrarkis, Emmanuil; Siebert, Ursula et al.
2008In Marine Pollution Bulletin, 56 (10), p. 1755-1764
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Keywords :
Endocrine disruption; Dicentrarchus labrax; Aegean sea
Abstract :
[en] 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.
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Schnitzler, Joseph ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Koutrarkis, Emmanuil;  Fisheries Research Institute > National Agricultural Research Foundation > 640 07 Nea Peramos, Kavala, Greece
Siebert, Ursula;  Research- and Technology Centre Westcoast > Christian-Albrecht-University Kiel > Büsum, Germany.
Thomé, Jean-Pierre ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Ecologie animale et écotoxicologie
Das, Krishna  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Language :
English
Title :
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?
Publication date :
October 2008
Journal title :
Marine Pollution Bulletin
ISSN :
0025-326X
eISSN :
1879-3363
Publisher :
Pergamon, Oxford, United Kingdom
Volume :
56
Issue :
10
Pages :
1755-1764
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture
Available on ORBi :
since 19 November 2008

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