THYROID HORMONE STATUS IN GRAY SEAL (HALICHOERUS GRYPUS) PUPS FROM THE BALTIC SEA AND THE ATLANTIC OCEAN IN RELATION TO ORGANOCHLORINE POLLUTANTS

We examined associations between the blubber concentrations of polychlorinated biphenyls, dichlorodiphenyltrichloroethane and metabolites, chlordanes, hexachlorocyclohexanes and hexachlorobenzene, and plasma concentrations of thyroid hormones in free-ranging, newly weaned gray seal pups from the Baltic Sea and the Norwegian waters of the Atlantic Ocean

Eugen Gravningen Sørmo; Ivar Jüssi; Mart Jüssi; Marte Braathen; Janneche Utne Skaare; Bjørn Munro Jenssen

2005

Scholarcy highlights

  • Mrine apex predators, such as the gray seal, are exposed to high concentrations of organochlorine compounds via biomagnification in the food web. These lipophilic pollutants are transferred from the female to her offspring during lactation, and there is particular concern for endocrine disruption in the offspring
  • The results from this study indicate that OCs may affect levels of thyroid hormones in free-ranging gray seal pups, and that more focus should be put on T3 when addressing the possible effects of OCs on thyroid hormone function and status in nonrodent species

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