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Mostrar el registro sencillo del ítem. JavaScript is disabled for your browser. Some features of this site may not work without it. Mostrar el registro sencillo del ítem dc. Lo Nostro, Fabiana Laura. The dusky grouper Epinephelus marginatus is a protogynous hermaphrodite fish, that maintains high levels of plasma steroids as juveniles, as substrates for sex inversion.
These fish are exposed to marine pollution from oil spills during cargo handling. Polycyclic aromatic hydrocarbons PAHs , such as phenanthrene Phe , are the main crude oil components and are toxic to fish, acting as endocrine disruptors ED.
This is the first study that investigated impacts of Phe as an ED in E. An in vivo sublethal exposure 96 h to Phe was carried out at two concentrations 0. Gonads, liver and spleen were processed for histological analysis. In an in vitro bioassay, gonad fragments were incubated with Phe 8. The in vivo exposure to Phe triggered an increase of the area of the hepatocytes, increased number of melanomacrophagic centers and hemosiderosis in the spleen; ETOH induced similar effects on spleen.
E2 and T levels did not change in plasma or in vitro media. Phenanthrene sharply reduced KT levels in vitro.
Although in vivo bioassay results were not unequivocal owing to ethanol effects, Phe might disrupt steroidogenesis in juvenile grouper, possibly causing dysfunctions during sex change and gonadal maturity, considering the importance of KT in developing ovaries. Academic Press Inc Elsevier Science.