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Orcasphere » 2009 » February
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Archives for February, 2009

A toxics-based biological observing system (tBiOS) for PS


Lyndal Johnson, NWFSC Pre-spawn mortality of salmon is occurring in restored urban streams.  It is associated with urban development, road traffic, and storm water runoff, but concentrations of toxics aren’t high enough to account for the convulsions and lethargy.  We suspect a synergistic effect of multiple pollutants. PAHs affect embryo development in spawned herring eggs [...]

Persistent organic pollutants in killer whales


Persistent organic pollutants as chemical tracers for Puget Sound marine biota, Gina Ylitalo Chemical tracers can be used to determine geographic ranges.  Persistent organic pollutants (POPs) like PCBs and PDBEs in Salish Sea herring (3 yr old males collected ’99 and ’04) showed elevated levels in Puget Sound relative to Georgia Strait, though difference was [...]

Endocrine Disruptors in Puget Sound


Irvin Schultz We’ve done lab work on fish/embryos response to exposure to estrogens, androgens, thryroid active agents (e.g. PBDEs), pychoactive drugs (e.g. Prozac).  Placed fish cages and water sampling by grab & passive equipment at field sites in Bell Creek (dairy farm runoff), Sammamish River (near stormwater outfalls), Tulalip tribal wastewater facility (secondary treatment water [...]

Etymology of the “Salish Sea”


During the Coast Salish plenary, Bert Webber described the process by which our marine ecosystem has gained a new (and much better) name. Living in Bellingham, it became apparent that this place on both sides of the U.S./Canada border shares a language-history.  In 1980′s Bert submitted the place-name “Salish Sea” to a sub-program of the [...]

Oceanography from Coast Salish canoes


A panel presentation about a 2-week journey in 2008 in which YSI probes and GPS units were carried by traditional canoes .  They observed a low dissolved oxygen area around the San Juan archipelago. Web site Plans for 2009: interpret wrt physical oceanographic models (e.g. currents) continuous monitoring by moorings depth profiles from chase boats [...]

Juvenile Salmon Use of Nearshore Habitats in San Juan County


Tina Wyllie-Echeverria Collaboration with Eric Beamer and Kurt Fresh (tows), and many students/volunteers 1950-2006, about 50 sites around the San Juans have been sampled and have found juvenile salmon.  Of 656km of SJI shoreline, 430km is rocky beach.  Tow nets (164 tows at 37 sites, monthly from Apr-Sep) caught juveniles of 5 species and 785k [...]

Nearshore Chinook use in Strait of Juan de Fuca


Anne Shaffer Focus on central and western strait, trying to identify restoration actions associated with dam removal on the Elwha.   The area is also an important migratory corridor, ultimately seeing about 85% of the outflow from the Salish Sea.  430 seines in many habitat types over last 18 months, 16 snorkel surveys, 2 yrs surf [...]

Fish Response to Shoreline Habitats


Jason Toft Comparing along-shore snorkel surveys between cobble beach, sand beach, rip rap, deep rip rap, and overwater structure. We see biggest difference when you have sub-tidal modifications. Gastric lavage of juvenile Chinook: insects dominate in shallow habitats, plankton/benthic dominate when shoreline is steep. At Olympic sculpture park, we looked at pocket beach and subtidal [...]

Juvenile Chinook use pocket estuaries near natal rivers


Eric Beamer, Juvenile Chinook salmon use of small non-natal estuaries  in the Whidbey Basin, eastern Admiralty Inlet, and the San Juan Islands Most of our juveniles are coming from the Skagit, accumulating early in the year (feb-may, some years as early as december, often associated with floods).  Pocket estuaries are safer places (most fish are [...]

North Kitsap Nearshore Fish


Paul Dorn, Preliminary Results of Beach Seine Sampling in 2007 and 2008. Unmarked coho dominated our seines, particularly in may/june.  Coho size about 120-140cm, larger if from hatchery.  Lots of juvenile chum in apr/may/june (many more in 2007 than in 2008, probably due to Dec 07 floods).  2008 pink salmon (may/june) show this is part [...]