M5 PM Marine Environmental Chemistry of Organic Pollutants
Monday, 14 November 2005: 1:50 PM - 5:30 PM in 321-323

(JOH-1117-665810) Polybrominated Diphenyl Ethers(PBDEs) and Polychlorinated Biphenyls(PCBs) in fish and dolphins from Florida Coast(USA).

Johnson-Restrepo, B.^{1, 2}, Kannan, K.¹, Addink, R.¹, Adams, D.³, ¹ Wadsworth Center, New York State Department of Health and State University of New York at Albany., Albany, New York, USA² Environmental and Computational Chemistry Group, University of Cartagena, Cartagena, Colombia³ Florida Fish & Wildlife Conservation Commission, Fish & Wildlife Research Institute, Melbourne, Florida, USA

ABSTRACT- Polybrominated diphenyl ethers (PBDE) and polychlorinated diphenyls (PCBs) were measured in dorsal muscle tissues of seven marine fish including one species of shark and one species of stingray as well as in blubber tissues of bottlenose- and striped- dolphins collected along Florida coastal waters, USA. Concentrations of PBDE in muscle tissues of fish collected in 2004, on average, ranged from 7.7 ng/g, (lipid wt) in silver perch, to 273 ng/g, (lipid wt) in Atlantic sharpnose shark with an overall mean concentration of 75 ±91 ng/g, lipid wt. Mean concentrations of PBDEs in the blubber of bottlenose- and striped- dolphins collected in the early 1990s were 222 and 563 ng/g lipid wt, respectively. BDE-47 was the major congener detected in fish and dolphin samples, followed by BDE-99, BDE-153, BDE-100 and BDE-154. In contrast, BDE-209 was the most abundant congener in Atlantic sharpnose shark. Concentrations of PBDEs were, on average, 20- to 100-fold greater than those of PCBs in fish species analyzed. Nevertheless, dolphins collected in the early 1990s contained three orders of magnitude greater PCB concentrations than PBDEs. Occurrence of BDE-183, BDE-203, and BDE-209 in addition to other major congeners such as BDE-47, BDE-99 and BDE-100, suggests exposure to all technical PBDE formulations such as penta-, octa- and deca- BDE mixtures in marine fish. Biomagnification factors of PBDEs and PCBs were examined in this coastal marine food chain comprising fish, shark and dolphins.

Key words: pbdes, pcbs, fish, dolphins