Science and Products
Increased sediment load during a large-scale dam removal changes nearshore subtidal communities
The coastal marine ecosystem near the Elwha River was altered by a massive sediment influx—over 10 million tonnes—during the staged three-year removal of two hydropower dams. We used time series of bathymetry, substrate grain size, remotely sensed turbidity, scuba dive surveys, and towed video observations collected before and during dam removal...Rubin, Stephen P.; Miller, Ian M.; Foley, Melissa M.; Berry, Helen D.; Duda, Jeffrey J.; Hudson, Benjamin; Elder, Nancy E.; Beirne, Matthew M.; Warrick, Jonathan; McHenry, Michael L.; Stevens, Andrew W.; Eidam, Emily; Ogston, Andrea; Gelfenbaum, Guy R.; Pedersen, Rob
Alaska Arctic marine fish ecology catalog
The marine fishes in waters of the United States north of the Bering Strait have received new and increased scientific attention over the past decade (2005–15) in conjunction with frontier qualities of the region and societal concerns about the effects of Arctic climate change. Commercial fisheries are negligible in the Chukchi and Beaufort...Thorsteinson, Lyman K.; Love, Milton S.
Boat ramp locations within the Columbia River Basin with associated recreational use, water quality measurements, and risk assessment data for zebra and quagga mussels
Aquatic invasive species are often transported between water bodies on boats or boat trailers, thus they are considered one of the primary vectors for new introductions of invasive species to a water body. This data set contains geographic positioning system locational data for boater access points, use data (i.e. recreational, fishing), water...Hardiman, Jill M.; Holmberg, Glen S.; Elder, Nancy E.
Urchins (Stronglyocentrotus spp.): Section 4.6
Summary Increased ocean temperature in combination with changes in ocean currents may cause urchin populations to expand or be replaced by another species. Increases in ocean acidity, hypercapnia, and decreasing carbonate mineral saturation are intricately linked and have been shown to have negative impacts on all urchin life stages (pelagic...Miller, Ian M.; Shishido, Caitlin; Antrim, Liam; Bowlby, C. Edward; Elder, Nancy E.
Nearshore biological communities prior to the removal of the Elwha River dams: Chapter 6 in Coastal habitats of the Elwha River, Washington--biological and physical patterns and processes prior to dam removal
Increases in sediment delivery to coastal waters are expected following removal of dams on the Elwha River, Washington, potentially increasing sediment deposition on the seafloor and suspended sediment in the water column. Biological communities inhabiting shallow, subtidal depths (3–18 m) near the mouth of the Elwha River, between the west end of...Duda, Jeffrey J.; Warrick, Jonathan A.; Magirl, Christopher S.; Rubin, Stephen P.; Miller, Ian M.; Elder, Nancy; Reisenbichler, Reginald R.; Duda, Jeffrey J.
Prevalence of viral erythrocytic necrosis in Pacific herring and epizootics in Skagit Bay, Puget Sound, Washington.
Epizootics of viral erythrocytic necrosis (VEN) occurred among juvenile Pacific herring Clupea pallasii in Skagit Bay, Puget Sound, Washington, during 2005-2007 and were characterized by high prevalences and intensities of cytoplasmic inclusion bodies within circulating erythrocytes. The prevalence of VEN peaked at 67% during the first epizootic...Hershberger, P.K.; Elder, N.E.; Grady, C.A.; Gregg, J.L.; Pacheco, C.A.; Greene, C.; Rice, C.; Meyers, T.R.
Dynamics of viral hemorrhagic septicemia, viral erythrocytic necrosis and ichthyophoniasis in confined juvenile Pacific herring Clupea pallasii
Capture of wild, juvenile herring Clupea pallasii from Puget Sound (Washington, USA) and confinement in laboratory tanks resulted in outbreaks of viral hemorrhagic septicemia (VHS), viral erythrocytic necrosis (VEN) and ichthyophoniasis; however, the timing and progression of the 3 diseases differed. The VHS epidemic occurred first, characterized...Hershberger, P.; Hart, A.; Gregg, J.; Elder, N.; Winton, J.
Abnormalities in larvae from the once-largest Pacific herring population in Washington State result primarily from factors independent of spawning location
Among larvae from populations of Pacific herring Clupea pallasii in Washington State those from Cherry Point have consistently demonstrated abnormalities indicative of distress, including low weights and lengths at hatch, increased prevalences of skeletal abnormalities, and shorter survival times in food deprivation studies. The biomass of adult,...Hershberger, P.K.; Elder, N.E.; Wittouck, J.; Stick, K.; Kocan, R.M.
Dissolved saxitoxin causes transient inhibition of sensorimotor function in larval Pacific herring (Clupea harengus pallasi) Kathi A. Lefebvre , N
Herring (Clupea harengus pallasi) spawning sites in Puget Sound, Washington overlap spatially and temporally with blooms of Alexandrium catenella, a toxic dinoflagellate species responsible for paralytic shellfish poisoning. Consequently, newly hatched herring larvae may be regularly exposed to the suite of dissolved paralytic shellfish...Lefebvre, Kathi A.; Elder, Nancy E.; Hershberger, Paul K.; Trainer, Vera L.; Stehr, Carla M.; Scholz, Nathaniel L.
Epidemiology of viral hemorrhagic septicemia (VHS) among juvenile Pacific herring and Pacific sandlances in Puget Sound, Washington
Viral hemorrhagic septicemia (VHS) and the associated virus (VHSV) were identified in newly metamorphosed Pacific herring Clupea pallasi and Pacific sand lances Ammodytes hexapterus captured from Puget Sound, Washington, between 1995 and 1998. During that 4-year period, virus was detected in less than 1% of free-ranging, age-0 Pacific herring;...Kocan, R.M.; Hershberger, P.K.; Elder, N.E.; Winton, J.R.
Management of Pacific herring closed pound spawn-on-kelp fisheries to optimize fish health and product quality
Use of high densities of newly recruited Pacific herring Clupea pallasi for the closed-pound spawn-on-kelp (PPSOK) fishery in Prince William Sound, Alaska, was associated with increased gamete retention, decreased product quality, and increased prevalence of viral hemorrhagic septicemia virus (VHSV) relative to the confinement of older...Hershberger, P.K.; Elder, N.E.; Marty, G.D.; Johnson, J.; Kocan, R.M.
Standardized seawater rearing of chinook salmon smolts to evaluate hatchery practices showed low statistical power
We examined, under standardized conditions, seawater survival of chinook salmon Oncorhynchus tshawytscha at the smolt stage to evaluate the experimental hatchery practices applied to their rearing. The experimental rearing practices included rearing fish at different densities; attempting to control bacterial kidney disease with broodstock...Palmisano, Aldo N.; Elder, N.E.