Proposed Abstract Title

Temporal trends of three major classes of toxic contaminants in two indicator fish species from Puget Sound, Washington

Type of Presentation

Oral

Session Title

Toxic Contaminants in Salish Sea Biota

Location

2016SSEC

Description

In this presentation we update time trends for three classes of persistent environmental contaminants in Puget Sound, polychlorinated biphenyls (PCBs), polybrominated diphenylether flame retardants (PBDEs), and polycyclic aromatic hydrocarbons (PAHs), in two indicator fish species, English sole (Parophrys vetulus) and Pacific herring (Clupea pallasii). English sole are a common and abundant flatfish that reflect sediment contaminant conditions; results for this species are summarized for ten index sites, ranging from highly urban habitats such as Elliott Bay and the Duwamish River, to less contaminated habitats in Hood Canal and northern Puget Sound, and monitored from 1998 through 2013. Pacific herring are a small-bodied, open-water (pelagic) planktivore that reflect contaminant conditions in the pelagic food web. Herring results are summarized for four distinct herring stocks in Southern (Squaxin), Central (Port Orchard/Madison), and Northern (Semiahmoo and Cherry Point) Puget Sound. Highlights of this monitoring include:

  • a significant decline in flame retardants in all four stocks of herring, ranging from 3.5% to 8.2% annual decline, while PCB concentrations remained static in Southern and Central Puget Sound stocks and declined weakly in the two stocks from Northern Puget Sound (approximately 2% per year),

  • increasing PCBs and PBDEs in English sole from several urbanized locations including Tacoma’s Thea Foss Waterway, Seattle’s Duwamish River, and Everett’s Port Gardner, and a decreasing trend of PAH exposure in English sole from Thea Foss Waterway, and

  • correlation between cleanup efforts and decreasing contaminants in English sole at some locations.

Results presented here are being incorporated into Puget Sound’s “Toxics in Fish” Vital Sign and are being used to evaluate the effectiveness of restoration efforts and to track the recovery of Puget Sound. This presentation is linked to a poster at this conference exhibiting the full results of this long-term monitoring.

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This oral snapshot presentation is linked to a poster that provides greater detail

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Temporal trends of three major classes of toxic contaminants in two indicator fish species from Puget Sound, Washington

2016SSEC

In this presentation we update time trends for three classes of persistent environmental contaminants in Puget Sound, polychlorinated biphenyls (PCBs), polybrominated diphenylether flame retardants (PBDEs), and polycyclic aromatic hydrocarbons (PAHs), in two indicator fish species, English sole (Parophrys vetulus) and Pacific herring (Clupea pallasii). English sole are a common and abundant flatfish that reflect sediment contaminant conditions; results for this species are summarized for ten index sites, ranging from highly urban habitats such as Elliott Bay and the Duwamish River, to less contaminated habitats in Hood Canal and northern Puget Sound, and monitored from 1998 through 2013. Pacific herring are a small-bodied, open-water (pelagic) planktivore that reflect contaminant conditions in the pelagic food web. Herring results are summarized for four distinct herring stocks in Southern (Squaxin), Central (Port Orchard/Madison), and Northern (Semiahmoo and Cherry Point) Puget Sound. Highlights of this monitoring include:

  • a significant decline in flame retardants in all four stocks of herring, ranging from 3.5% to 8.2% annual decline, while PCB concentrations remained static in Southern and Central Puget Sound stocks and declined weakly in the two stocks from Northern Puget Sound (approximately 2% per year),

  • increasing PCBs and PBDEs in English sole from several urbanized locations including Tacoma’s Thea Foss Waterway, Seattle’s Duwamish River, and Everett’s Port Gardner, and a decreasing trend of PAH exposure in English sole from Thea Foss Waterway, and

  • correlation between cleanup efforts and decreasing contaminants in English sole at some locations.

Results presented here are being incorporated into Puget Sound’s “Toxics in Fish” Vital Sign and are being used to evaluate the effectiveness of restoration efforts and to track the recovery of Puget Sound. This presentation is linked to a poster at this conference exhibiting the full results of this long-term monitoring.