Effects of a Salmon Shark Fishery in Prince William Sound. Team Captain: Kelly King Sheila Oelrich Tyler Roesch Keegan Birchfield Heather Sinclair
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1 Effects of a Salmon Shark Fishery in Prince William Sound Team Captain: Kelly King Sheila Oelrich Tyler Roesch Keegan Birchfield Heather Sinclair
2 Team Sharks vs. Jets Geography of Prince William Sound (Tyler) Economical Review of PWS aquaculture and Prince William Sound Ecosystem (Keegan) Biology of the Salmon Shark (Heather) Salmon Shark Fishing (Sheila) Management Plan (Kelly)
3 25,000 mi 2 Surrounded by the Chugach Mountains Formed by a Glacier Protected from storm surges Largest Islands are Montague and Hinchinbrook Geography
4 Environment Bathymetry influences water flow Upwelling and turnover circulates nutrients Rich nutrients supports ocean life Temperatures, 4 C to 18 C summer and 12 C to 3 C winter East dry, west wet
5 Communities Three major communities Valdez is the terminus of the pipeline Cordova is a fishing community Whittier is the Kenai peninsula s access point
6 Alaska and U.S. Fishing Economy 12 of nations top 93 ports 54% U.S. commercial seafood harvest One-fifth of jobs
7 Prince William Sound $35.4 million commercial salmon harvest Fishing=80% of annual income Oil, Tourism, and Sport fishing
8 Magnuson-Stevens Fisheries and Conservation Act Last reauthorized in 1996 Expired in 1999 Attempts to reinstate in May 2005 Effects: Wide scope of effect on fisheries By catch, regional vs. national standards, management of marine ecosystems, and fisheries management New fisheries proposal
9 Prince William Sound Ecosystem Estuarine Rain runoff, melting glaciers and icebergs, streams and rivers Wide variety of organisms
10 Prince William Sound Currents
11 Prince William Sound Food Apex Predator Ocra Fourth Level Consumers (Seals, Sea Lions, Dall s Porpoise) Web Teritary Consumer Apex Predator (Salmon, Pollock, Cod) Sharks Secondary Consumers (Barnacles, Mussels) Primary Consumers (Copepods, Larval fishes, Jellyfish) Primary Producers (Phytoplankton, Macroalgae, Seagrass) Teritary Consumers (Herring, Capelin, Eulachon) Trophic Level Primary producers Primary consumers Secondary consumers First level tertiary consumers Second level tertiary consumers Fourth level consumers Apex predators Biomass in tons per kilometer Detritus Okey, T.A. and D. Pauly (eds.) Exxon Valdez Oil Spill Restoration Project Annual Report Detritus
12 Physical Description 6 to 8.5 ft long 250 to 500 lbs, up to 600 lbs Streamlined body, conical snout, large gills Low fecundity rate 4 to 5 pups every two year repro. Cycle Maturity Males (5 years) Females (8-10) Gestation period (9 month estimate)
13 Range North Pacific to Southern CA Eurythermal (9ºC to 16ºC)(5ºC,18ºC) Endothermic Highest body temp. of all sharks Difference in body and ambient temp. 21.2ºC Rete mirabile
14 Tagging of Pacific Pelagics (TOPP)
15 Habits Feeding Gulf of Alaska (Prince William Sound) Some migrate to west coast of Canada, some remain in PWS and GOA Opportunistic feeders Predominately salmon Squid, sablefish, Pacific herring, rockfish, capelin, spiny dogfish, arrowtooth flounder, and codfishes
16 Current trends Increased abundance (Alaska Shark Assessment Program) Warming trend, improvement of ground fish production and Pacific Salmon (wild and farmed) Increase in local densities By-catch dumping, increase in number of hatchery programs
17 Salmon Shark Market growing worldwide Cosmetics Medicine Leather Fin soup
18 Australian Shark Fishing Successful population monitoring Management team Biologists Population Modelers Fishermen Economists
19 Alaskan Shark Fishing Prince William Sound Estimated 30 shark charter boats Limit 1 per day, 2 per year
20 Individual Fishing Quota Allowable Catch Determined by population studies Number or poundage of fish evaluated as sustainable Allotment of Shares Division of allowable catch Generally distributed according to previous individual quotas
21 Individual Fishing Quota Benefits Flexibility in adjustment to regulations, market conditions Greater economic certainty Sustainable balance of supply and demand Monitor changes in salmon shark behavior and population
22 Individual Fishing Quota Potential Drawbacks Public perception Imbalance of shares Addressing Problems Fishery in Prince William Sound still limited IFQ system could raise allowable catch
23 Individual Fishing Quota North Pacific Fishery Management Council Recommended implementation of IFQ system after halibut population declined sharply Became official in 1995 Juneau, Sitka, and Homer
24 Individual Fishing Quota IFQ system Cordova, Valdez, and Whittier Final Rule (amendment) Small Community Final Rule Ellamar, Port Ashton, Crab Bay,Tatitlek and Chenega Island villages and towns
25 Research Alaska Shark Assessment Program Tagging of Pacific Pelagics (TOPP) EVOS Trustee Council Gulf of Alaska Ecosystem Monitoring (GEM) North Pacific Research Board (NPRB)
26 Thank You!! Coach Bruce Rife Kenneth Goldman Penny Vadla Captain Ron Horton Carmen Field Moms and Dads
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