Geoduck Aquaculture in Puget Sound Woodpeckers in Your Neighborhood

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Geoduck Aquaculture in Puget Sound Woodpeckers in Your Neighborhood What are geoducks? • Panopea generosa • Nisqually word for “dig deep” • Saltwater clams (Bivalve molluscs) native to the PNW • Big, deep, long-lived, very numerous, highly fecund Geoduck Fishery • Began in 1970 • Value increased in 1990s • Extremely lucrative • Managed sustainably but cannot meet demand 7,000 $25,000 http://blogs.menupages.com/boston/Geod 6,000 ucks.jpg $20,000 5,000 $15,000 4,000 3,000 Production (MT) $10,000 2,000 Value (2003 $000's US) $5,000 1,000 0 $0 1976 1979 1982 1985 1988 1991 1994 1997 2000 2003 Production Value J. Patrick Fisher Jonathan King, Northern Economics What is geoduck aquaculture? • Aquaculture: agriculture in the water • “farming” geoducks for human food • Methods developed by WDFW for fisheries enhancement • Adapted by shellfish industry • Rapid expansion B. Vadopalas P.S. McDonald 70% 60% 50% Fishery 40% 30% Culture 20% 10% 0% 2000 2001 2002 2003 2004 Percent change in WA geoduck landings and aquaculture production (Jonathan King, Northern Economics, Anchorage AK, Personal Communication). How does it work? Spawning Broodstock Geoduck “Seed” Broodstock Images by PS McDonald, R Smith, and J Davis How does it work? PVC tubes – “anti- Tubes covered with net Net and tubes removed predator structures” Net and tubes left in after 2-3 years place for 2-3 years Geoduck remain for 5-7 years total before harvest Images by PS McDonald and R Smith How does it work? Geoducks harvested using low pressure water hoses Causes “liquefaction” of the sediment around the clam’s body, allowing them to be removed easily Images by PS McDonald and R Smith How is it Managed? • Complex regulatory and Federal State Local permit process Department of Natural Resources US Army Corps of Engineers Department of Health City/County government Consultation Department of with other Fish and agencies: Wildlife US Fish & Wildlife NOAA Department of Ecology US EPA So what is the problem? • Habitat effects? • Genetic effects? • Tubes and nets physically alter • What are the genetic effects the habitat of growing geoducks within • Harvesting liquefies sediment the range of wild geoduck? • Food web effects? • Disease effects? • Clam abundance change the • What is the likelihood that ecosystem—they eat plankton having a high concentration of that would be eaten by geoducks leads to a disease someone else epidemic? Will this impact the local wild geoduck? • Nutrient effects: increased nitrogen and phosphorus near farms? • Little Peer-Reviewed Science • Heated Debate Who are the stakeholders? What do they think? • Growers • “They are putting feedlots in PS and they • Environmental are feeding off our advocates fishery resources to • Local property owners fatten up their product” • Resource Managers: WDFW/WDNR • “They are picking places with high ecological • Washington Treaty value…they want the Tribes most pristine areas with • Geoduck Fishermen eel grass and other valuable resources” Who are the stakeholders? What do they think? • Growers • “The disturbance isn’t continuous. After several tide • Environmental cycles, you see the critters advocates back.” • “We try to avoid firefights by • Local property owners looking for areas without multiple use, but those areas • Resource Managers: are getting harder to find.” WDFW/WDNR • “ Mature geoducks filter up to 31 gallons of water per day, • Washington Treaty Tribes removing nutrients that promote algae blooms that rob • Geoduck Fishermen the water of oxygen vital to marine life…and the feces from geoducks helps feed sea grasses that are a critical component of the nearshore habitat.” Who are the stakeholders? What do they think? • Growers • “Clams are blasted out of the sand with high • Environmental advocates pressure water hoses, • Local property owners temporarily turning the tideflats into a liquefied, • Resource Managers: soupy mess.” WDFW/WDNR • Washington Treaty Tribes • “I came home from work • Geoduck Fishermen one day a year ago and there it was in front of my house. It’s a horrible eyesore. I wish they would take it out.” Who are the stakeholders? What do they think? • Growers • “Commercial geoduck clam aquaculture occurs on • Environmental privately-held or leased lands and to date has been advocates mostly in intertidal areas (on • Local property owners beaches).” • Resource Managers: WDFW/WDNR • “A WDFW Aquatic Farm Registration and Washington • Washington Treaty Tribes Department of Health Shellfish License are required • Geoduck Fishermen to cultivate and sell farm- raised geoducks.” What else would you like to know about this issue? .
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