[MARMAM] Pollutants in Cetacean and Pinniped Brains

emontie at marine.usf.edu emontie at marine.usf.edu
Mon Aug 10 14:35:51 PDT 2009

Dear Colleagues,
We would like to draw your intention to the following paper recently
published in Environmental Pollution 157 (2009) 2345–2358.

"Organohalogen contaminants and metabolites in cerebrospinal fluid and
cerebellum gray matter in short-beaked common dolphins and Atlantic
white-sided dolphins from the western North Atlantic"

Eric W. Montie, Christopher M. Reddy, Wouter A. Gebbink, Katie E. Touhey,
Mark E. Hahn, Robert J. Letcher

Concentrations of several congeners and classes of organohalogen
contaminants (OHCs) and/or their metabolites, namely organochlorine
pesticides (OCs), polychlorinated biphenyls (PCBs), hydroxylated-PCBs
(OH-PCBs), methylsulfonyl-PCBs (MeSO2-PCBs), polybrominated diphenyl ether
(PBDE) flame retardants, and OH-PBDEs, were measured in cerebrospinal
fluid (CSF) of short-beaked common dolphins (n = 2), Atlantic white-sided
dolphins (n = 8), and gray seal (n = 1) from the western North Atlantic.
In three Atlantic white-sided dolphins, cerebellum gray matter (GM) was
also analyzed. The levels of OCs, PCBs, MeSO2-PCBs, PBDEs, and OH-PBDEs in
cerebellum GM were higher than the concentrations in CSF.
4-OH-2,3,3',4',5-pentachlorobiphenyl (4-OH-CB107) was the only detectable
OH-PCB congener present in CSF. The sum OH-PCBs/ sum PCB concentration
ratio in CSF was approximately two to three orders of magnitude greater
than the ratio in cerebellum GM for dolphins.

Best Regards,
Eric Montie

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