[MARMAM] Publication available

Peter Corkeron peter.corkeron at gmail.com
Wed Sep 26 12:01:34 PDT 2007


Dear Marmamers

The following paper was published recently:

ACCUMULATION AND TRANSFER OF CONTAMINANTS IN KILLER WHALES (ORCINUS
ORCA) FROM NORWAY: INDICATIONS FOR CONTAMINANT  METABOLISM

HANS WOLKERS, PETER J. CORKERON, SOFIE M. VAN PARIJS, TIU SIMILÄ , and
BERT VAN BAVEL

Environmental Toxicology and Chemistry, Vol. 26, No. 8, pp. 1582–1590, 2007

Abstract—Blubber tissue of one subadult and eight male adult killer
whales was sampled in Northern Norway in order to assess the degree
and type of contaminant exposure and transfer in the herring–killer
whale link of the marine food web. A comprehensive selection of
contaminants was targeted, with special attention to toxaphenes and
polybrominated diphenyl ethers (PBDEs). In addition to assessing
exposure and food chain transfer, selective accumulation and
metabolism issues also were addressed. Average total polychlorinated
biphenyl (PCB) and pesticide levels were similar, approximately 25
_g/g lipid, and PBDEs were approximately 0.5 _g/g. This makes killer
whales one of the most polluted arctic animals, with levels exceeding
those in polar bears. Comparing the contamination of the killer
whale's diet with the diet of high-arctic species such as white whales
reveals six to more than 20 times higher levels in the killer whale
diet. The difference in contaminant pattern between killer whales and
their prey and the metabolic index calculated suggested that these
cetaceans have a relatively high capacity to metabolize contaminants.
Polychlorinated biphenyls, chlordanes, and
dichlorodiphenyldichloro-ethylene (DDE) accumulate to some degree in
killer whales, although toxaphenes and PBDEs might be partly broken
down.

The first author's a little preoccupied at present, so if you'd like a
pdf, please email me: peter.corkeron at gmail.com

Btw, I've started blogging some of my experiences: http://aleakage.blogspot.com/

Peter Corkeron




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