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Improving Fish Stock Assessments (1998) / Chapter Skim
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Appendix H
Pages 153-160

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From page 153...
... COMMISSION AND STATE CONCERNS AND COMMENTS REGARDING STOCK ASSESSMENTS Atlantic States Marine Fisheries Commission (ASMFC) The complexity of many stock assessments models leads to a lack of understanding among those who may not have a scientific background.
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From page 154...
... Pacific States Marine Fisheries Commission (PSMFC) There are fisheries on the West Coast that do not have the basic population data necessary to allow adequate assessment modeling.
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From page 155...
... For the past three years, ADF&G has focused on development of length-based methods for shellfish stock assessments under a range of data situations (e.g., trawl survey, pot survey, no survey)
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From page 156...
... (1996) for methods CSA in progress CPUE index from experimental fishery Plans: GIS analysis of fisheries with on-board observer data None Trawl survey, area-swept estimator CPUE model used to project attainment of fixed quota LBA in progress for Bering Sea, LBA planned for Kodiak Bering Sea Trawl survey, area-swept estimator Needs: growth and M estimates Hair crab Bering Sea Trawl survey, area-swept estimator Needs: growth and M estimates Dungeness crab Southeast Alaska, Yakutat, Kodiak, None Alaska Peninsula CLA possible in future Prince William Sound, Cook Inlet Pot survey, index of abundance CSA possible in future Pink shrimp Cook Inlet, Kodiak, Alaska Peninsula Trawl survey, area-swept estimator Southeast Alaska Weathervane scallop Prince William Sound, Cook Inlet Yakutat, Kodiak, Dutch Harbor, Bering Sea Sea cucumber Southeast Alaska Elsewhere Sea urchin Southeast Alaska Elsewhere Intertidal clams None Dredge survey, area-swept estimator None Dive survey, surplus production model None Dive survey, surplus production model None LBA in progress for Cook Inlet CLA possible in future Plans: develop age-structured model Plans: GIS analysis of onboard fishery observer data Needs: growth and recruitment estimates Needs: sampling, basic biological information Needs: growth and recruitment estimates Needs: sampling, basic biological information Cook Inlet (Kachemak Bay)
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From page 157...
... Gulf States Marine Fisheries Commission (GSMFC) The stock assessment team of the Gulf States Marine Fisheries Commission has reviewed the documents provided by your office and generally offer complete concurrence with the thirteen points raised by the Atlantic States staff.
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From page 158...
... Directed Westside set net fishery limited to two openings per week and reduced if CPUE low Kodiak Fixed escapement goal Aerial survey, weir count Chignik Fixed escapement goal Aerial survey, weir count Alaska Peninsula Fixed escapement goal Aerial survey, weir count Bristol Bay Fixed escapement goal Sonar count, aerial survey Kuskokwim River Reduced fishing periods when run strength Test fishery CPUE is weak Yukon River Catch incidental to fall chum fishery, stock Test fishery CPUE, sonar count not fully exploited Pink salmon Southeast Alaska Fixed escapement goals Aerial survey Prince William Sound Fixed escapement goals Aerial survey, hatchery stock identification based on CWT Lower Cook Inlet Fixed escapement goals Aerial survey Kodiak Fixed escapement goals Aerial survey Chignik Fixed escapement goals Aerial survey Alaska Peninsula Fixed escapement goals Aerial survey Bristol Bay, Production highly variable, markets not well None Norton Sound developed Chum salmon Southeast Alaska Generally catches incidental to pink salmon, Aerial surveys, poor quality due to presence of pink except for hatchery terminal harvest salmon Prince William Sound Generally catches incidental to pink salmon, Aerial surveys, poor quality due to presence of pink except for hatchery terminal harvests salmon Kodiak Generally catches incidental to pink salmon, Aerial surveys, poor quality due to presence of pink except for hatchery terminal harvests salmon
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From page 159...
... APPENDIX H TABLE H.4 (Continued) 159 Species Name/Area Harvest Policy Stock Assessment Methods Alaska Peninsula Bristol Bay Kuskokwim River Yukon River Norton Sound Kotzebue Sound Sockeye salmon Southeast Alaska Yakutat Copper/Bering River Upper Cook Inlet Kodiak Chignik Alaska Peninsula Generally catches incidental to pink salmon Harvests incidental to directed sockeye fishery Fixed escapement goal Fixed escapement goals, in river allocation plan, subsistence priority summer run fishery is market limited Fixed escapement goal, large-run fisheries are market limited Fixed escapement goal Fixed escapement goals, interception fishery limited by quota Fixed escapement goal Fixed escapement goal Fixed escapement goal Fixed escapement goal Fixed escapement goal Fixed escapement goal, June interception quota set on Bristol Bay sockeye preseason forecast and chum cap Bristol Bay Fixed escapement goal Aerial surveys, poor quality due to presence of pink salmon Nushagak sonar, aerial survey Sonar count, test fishery catches, weir counts, aerial survey Sonar count, test fishery catches Lower counts, aerial surveys, weir counts Sonar count, aerial survey, test fishery catches Weir count, mark-recapture Weir count, aerial survey Sonar count, aerial survey Sonar count, test fishery catches Weir count, test fishery catches Weir count, test fishery catches Weir count, aerial survey, test fishery catches Lower count, sonar count, aerial survey, test fishery catches TABLE H.5 Methods Used to Assess Pacific Herring Area Harvest Policy Stock Assessment Methods Southeast Alaska Prince William Sound Lower Cook Inlet Kodiak Bristol Bay Kuskokwim Bay Norton Sound Fixed harvest rate with threshold Fixed harvest rate with threshold Quota based on historical catches that maintained stable abundances; quota increments or decrements based on in-season abundance indices Quota based on historical catches that maintained stable abundances; quota increments or decrements based on in-season abundance indices Fixed harvest rate with threshold Quota based on historical catches that maintained stable abundances; quota increments or decrements based on in-season abundance indices Quota based on historical catches that maintained stable abundances; quota increments or decrements based on in-season abundance indices Age-structured analysis tuned to biomass estimated with spawn deposition surveys Age-structured analysis tuned to biomass estimated with spawn deposition surveys, aerial surveys Aerial surveys Aerial surveys Aerial surveys Aerial surveys Aerial surveys
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From page 160...
... FMP to be published in 1997 NOTE: FMP = fishery management plan; SPR = spawning biomass per recruit; SSBR = spawning stock biomass per recruit; VPA = virtual population analysis.
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Key Terms

  • aerial survey
  • marine fisheries
  • stock assessments
  • aerial surveys
  • test fishery

  • cook inlet
  • fixed escapement
  • states marine
  • fisheries commission
  • weir count

  • sonar count
  • prince william
  • fishery cpue
  • fishery management
  • william sound

  • assessment methods
  • trawl survey
  • pink salmon
  • escapement goal
  • atlantic states

  • escapement goals
  • southeast alaska
  • biological information
  • bristol bay
  • deposition surveys

  • basic biological
  • catches incidental
  • gulf states
  • west coast
  • assessment models


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