K, J Koistinen, K Beckmen, T Evans, JF Gorzelany, KJ Hansen, PD Jones,
E Helle, M Nyman and JP Giesy. 2001. Accumulation
of perfluorooctane sulfonate in marine mammals. Environmental
Science and Technology 35:1593-1598.
some background on PFOS
corporate coverup on PFOS?
a companion paper on PFOS
et al. report on contamination levels of PFOS perfluorooctane
sulfonatein the tissue of marine mammals from around the world.
They found PFOS in most samples. Levels ranged up to 1520 nanograms/gram
(ppb), with the highest observed in the livers of bottle-nose dolphin
from Florida Bay.
patterns emerged in their data, although additional study will be needed
to because of the eclectic sources of the samples:
even in the most remote locationsfor example, polar bears
from northern Alaskacontained significant PFOS levels. PFOS
contamination is everywhere.
locations had less contamination than sites near developed and industrialized
regions. Thus seals from the Baltic Sea were more contaminated than
seals from the Arctic Ocean near Spitzbergen.
animals had higher concentrations than off-shore animals. This in examining
several species of dolphins and porpoises in the region of Florida Bay,
the near-shore feeders (bottle-nose dolphins) were more contaminated
than off-shore feeders (pygmy sperm whales).
water (inland) had higher contamination. River otters from the Columbia
River in Washington State were more contaminated than sea otters from
the nearby coast.
the most part, contamination level was not related to age, at least