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Orcasphere » 2009 » February
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Archives for February, 2009

Nearshore distribution and size-structure of juvenile salmon and forage fishfrom the observations and modeling on watersheds, marine waters, and marine biota. These talks will focus


Elisabeth Duffy*, David Beauchamp Juvenile salmon are moving through Puget Sound (PS) from April-July.  By end of July most have made it to the deep ocean.  Percent of fish from hatcheries is about 50% in N PS and 90% in S PS. Nearshore fish comunity: herring and perch up north, hatchery salmon dominate in the [...]

Forage fish spawning habitat selection


Theresa Liedtke et al focuesd on 2 forage fish species: Pacific sand lance and Pacific herring Initially focused on Liberty Bay (Poulsbo, WA; today’s data) with non/urban coastline; now working at Possession Point (s Whidbey Island) to get higher wave action and feeder bluffs.  12 sand/sediment samples, 500ml samples preserved eggs. Findings: 40k eggs in [...]

K. Dodd: dynamics of Port Madison fish


Data from N end of Bainbridge and repeat trawl survey from Tom Quinn’s UW class (~20 trawls/year from 1991-2008, over 2nd weeend in May, 4 depths (10-70m)).  Time series started just after 1989 fish closure, so expected increase in catch rate over time, but that wasn’t the case. Catch anomaly shows an actual catch that [...]

Alejandro Frid: rockfish & predation risk theory


Vancouver Aquarium Marine Science Center Focusing on quillback rockfish and interactions with one of their prey, 3 genera of demersal shrimp which show strong spatial association.  An example from 8 reefs in Howe Sound and adjacent Georgia Strait, depths 14-25m, daytime, 10 Jul – 18 Nov, 2008 Lingcod are the main predator of quillback rockfish.  [...]

Eric Eisenhardt: Efficacy of bottomfish recovery zones


We have a great op in the San Juan Islands to compare marine reserves set up in ~1990 (mandatory) with bottomfish recovery zones (BRZ) were established ~7 years later (voluntary).  Overall, regulations have changed over time, essentially getting more restrictive. Methods: 300 dives since 1997; transects to compare recovery zones with paired (nearby) reserve lingcod [...]

Anne Beaudreau on lingcod in the San Juan Islands


What are the interacting relationships between rockfish, the lingcod that eat them, and the fishers who take lingcod (and rockfish)?  In reserves we can look at predatory role of lingcod without fishing pressure.  We can also look at differences in lingcod population structure and feeding between non/reserves. Most samples from central San Juan Channel in [...]

John Calambokidis PSGB’09 talk


Changes in marine mammal populations of the Salish Sea: What will the future look like? Pinnipeds Harbor seal populations have stabilized — probably at historical levels –  in all areas of Washington after rising from lows of the 70s and 80s, often generating (old) conflicts with human fishers… Many haulout areas were actually dynamited, so [...]

Lynne Barre PSGB’09 talk


Implementation of the recovery plan for SRKWs Section 7 consultations: Looking at Federal actions (funding, permiting, regulating) that might affect hydropower (hatchery production), water treatment plants, sewer outfalls, in-water construction, upland projects, habitat restoration, research, tidal and wave energy, etc. Recovery plan implementation: started in 2003 really with funding before plan was final (research, enforcement [...]

Health of the Salish Sea: panel discussion


Andrea Copping, Chief Leah George-Wilson, Richard Beamish, Mary Ruckelshaus, Joel Baker Richard Beamish: State of the Salish Sea (Richard Beamish) Warming trends over last 30yrs  in Strait of Georgia [SoG] (steady) and Puget Sound (slower) Decline in % early marine survival of Coho from 15% down to 1% since 1996 (entrance to SoG through Sept [...]

Keynote talk: 2009 Puget Sound Georgia Basin


Andrew Rosenberg from U of New Hampshire speaking on “Ecosystem-based Management:developing a framework for implementation” at 9:25am PST. Evidence for ecosystem effects: We know ecosystem-level impacts occur (from scientific and traditional knowledge) We know regine shifts occur and that our perception change with shifting baselines Keep in mind that we are approaching theoretical limits of [...]