1 / 28

Outline

An Assessment of Fisheries Management Strategies in Alaska Relative to the Goals of Ecosystem Approaches to Management. Anne B. Hollowed, Kerim Aydin, Jennifer Boldt, Angie Greig, Patricia Livingston, and Chang Ik Zhang. Outline. Overview of EBM objectives in US fisheries off Alaska

nuri
Download Presentation

Outline

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. An Assessment of Fisheries Management Strategies in Alaska Relative to the Goals of Ecosystem Approaches to Management Anne B. Hollowed, Kerim Aydin, Jennifer Boldt, Angie Greig, Patricia Livingston, and Chang Ik Zhang

  2. Outline • Overview of EBM objectives in US fisheries off Alaska • Examples of current EBM management measures • Reporting and tracking EBM a. Status reports and indicatorsb. Modeling efforts to predict future impactsc. Tracking progress using an integrated framework tool • Evaluation of effectiveness of EBM mgt off Alaska • Future research and management direction

  3. North Pacific Fishery Management Council Ecosystem Approach to Management • Prevent Overfishing • Promote Sustainable Fisheries and Communities • Preserve Food Web • Manage Incidental Catch and Reduce Bycatch and Waste • Avoid Impacts to Seabirds and Marine Mammals: • Reduce and Avoid Impacts to Habitat • Promote Equitable and Efficient Use of Fishery Resources • Increase Alaska Native Consultation • Improve Data Quality, Monitoring and Enforcement www.fakr.noaa.gov/tasking/management_FMP.pdf

  4. Multi-species, Multi-fishery, Multi-Sector, Multi-Objective Management

  5. Catch TAC ABC OFL Current Groundfish Stock Status Relative to MSY and B(MSY) Control Rule • Multispecies management • Individual TAC’s should not be exceeded • Basis is to use “lowest common denominator” species • Fishery “openings” allowed based on anticipated bycatch rates • Fishery “closures” occur based on real-time observer catch estimates and fish-ticket data. • OY caps – 2 Million t BSAI

  6. Bering Sea Habitat Conservation Area Bering Sea Research Area 2008 Aleutian Islands Habitat Conservation Area 2007

  7. Prohibited speciesManagement • Prohibited species caps:P. halibut, BSAI crab, P. salmon (especially Chinook and Chum), P. herring • Gear/Area closures • Bristol Bay Red King Crab Conservation Area • Chinook salmon: • Hard cap + incentive programs • Chum salmon: TBD this summer Pacific herring. Photo: JJ Vollenweider, NOAA Fisheries

  8. Non-target Management • Vulnerability assessment • Susceptibility: bycatch rate. • Productivity: vital rates • Divide groups into complexes with similar life history characteristics: sculpin, shark, skates, octopus, squid • Species identification of catch • Accelerated life history studies

  9. Forage Fish • Catch deterrents • Maximum Retention Allowance 2% of landed catch • No directed fishery Reduce Discard • Full retention provisions on catcher vessels targeting cod and pollock • Groundfish Retention Standards • Bycatch avoidance research

  10. Annual Stock assessment Fishery Evaluations Catch reporting: non-targets, prohibited species, seabirds, other non-specified, forage fish Essential Fish Habitat – 5 year assessment and review Reports from protected resources Peer review by Center of Independent Experts and Marine Stewardship Council Alaska Fisheries Science Center & North Pacific Fishery Management Council’s version of Integrated Ecosystem Assessments www.NPFMC.NOAA.gov

  11. Ecosystem Considerations Chapter Fisheries and The Environment (FATE) /Resource Ecology and Ecosystem Modeling (REEM) “Proto” = shows recent level and trend in relation to historical variation (“green zone” is +/- 1 S.D.) Direction and color not indicative of “good” or “bad”. Five-year running mean Five-year linear trend

  12. BS Diversity index BS Species richness BS size spectrum slope BS HAPC survey CPUE AI HAPC survey CPUE GOA Diversity index GOA species richness GOA HAPC survey CPUE All regions – indices of diversity

  13. Total catch Bottom trawl effort Longline effort Pot effort Trophic level of catch FIB index Discards Discard rate HAPC nontarget catch Bering Sea Fishing effects on ecosystem

  14. Forecasting Models • Multispecies Bycatch Model • MSVPA/MSFOR • End – To – End Models • Multispecies Management Strategy Evaluations • ECOSIM

  15. Zhang, C. I., S. Kim, D. Gunderson, R. Marasco, J. B. Lee, H. W. Park, and J. H. Lee. An Ecosystem-based Fisheries Assessment Approach for Korean Fisheries. Fisheries Research. 2009. Application of Integrated Fisheries Risk Assessment Method for Ecosystems (IFRAME) to EBS trawl fisheries Integrated Risk Scores Performance tracking Evaluation of alternative management strategies Preliminary results and discussion Integrated Fisheries Risk Assessment Method or Ecosystems IFRAME

  16. Since 1997, numerous fishery management actions for groundfish have been implemented. Amendment of Magnuson-Stevens Fishery Conservation and Management Act (MSFCMA) American Fisheries Act, and A suite of Steller sea lion protection measures These changes warrant evaluation of their impacts on the EBS trawl fisheries and fisheries impacts on the EBS ecosystem. Changes in management for the EBS trawl fisheries

  17. Management objectives and attributes (New) S Sustainability H Habitat E Socio-Economics B Biodiversity • Biomass • Fishing intensity • Size/age at first capture • Habitat size • Community structure • Habitat damage • Discarded wastes • Habitat protection • Incidental catch • Discards • Trophic level • Diversity • Integrity of functional group • Macro- economics • Micro- economics • Social considerations

  18. Sustainability Biomass*** Catch*** Age at first capture** Biodiversity Discard rate** Mean trophic level** Diversity index*** Habitat Critical habitat damage rate** Prohibited area from fishing*** Socio-economy Catch per vessel** Price per pound* Average wage*** Indicators developed so far *Number of asterisks denotes relative weights

  19. Nested risk indices of IFRAME Ecosystem Fishery A Species 1 Objective S … ORI Objective B … ORI Objective H … ORI Objective E … ORI Species 2 Objective S … ORI Objective B … ORI Objective H … ORI Objective E … ORI Fishery B Species 1 Objective S … ORI Objective B … ORI Objective H … ORI Objective E … ORI Species 2 Objective S … ORI Objective B … ORI Objective H … ORI Objective E … ORI Bi : Biomass or biomass index of species i Ci : Catch of fishery SRI Ii : Score of indicator i Wi : Weighting factor of indicator i n : Number of indicators FRI SRI : Weighting value for objectives : Sustainability risk index : Biodiversity risk index : Habitat risk index : Socio-economic risk index ERI SRI FRI SRI

  20. Assessing indicators using reference points Example _ Sustainability_Biomass (Tier 1) Walleye pollock : 1997 2007 . BMSY 1.84 mmt 2.06 mmt 0.5BMSY 0.94 mmt 2.03 mmt Biomass 3.67 mmt 1.95 mmt Risk score 0 0.22

  21. 97 97 07 07 97 97 07 07 Preliminary risk assessment diagram for the EBS trawl fishery FRI97 =0.665, FRI07=0.291

  22. Evaluation of NPFMC harvest strategy relative to principles of EAM • Management policy aligns well with principles of EAM. • Complex system of management results in multi-sector management. • Precautionary harvest policies appear to be sustainable. • Predictive tools are needed to account for the interactions to assess how proposed changes ripple through the system.

  23. IFRAME as an Element of Integrated Ecosystem Assessments • IFRAME synthesizes indicators into a risk assessment framework for use in evaluating the efficacy of management practices. • Identifies key gaps in knowledge. • Risk scores currently scaled to common scoring system but ecosystem impacts may not be equal. • Ecosystem status could be influenced by factors other than management strategy. • Weights currently subjective and may differ between user groups. • Preliminary results indicate there was an improvement in the ecosystem resulting from new management practices.

  24. Future Issues and Modeling • Integrated Ecosystem Assessments feasible because of comprehensive monitoring and assessment program within AFSC. • Further research needed on key relationships: • Catch quotas and trawl distribution and intensity. • Catch quotas and incidental catch rate. • Improved understanding of life history of non-target species. • Forecasting: IFRAME +Technical Interactions

  25. Results of risk assessment for walleye pollock NS : denotes non-significant A total of 7 species (Pacific cod, POP, yellowfin sole, rock sole, flathead sole, and arrowtooth flounder) were assessed.

  26. The Ecosystem Assessment: Tracking and modeling the effects of fishing and climate on ecosystem structure and function on multiple scales • Preserving nodal species within a complex network • 300+ species • Measuring direct and indirect effects of fishing and climate within a food web • 100+ groups including multiple fisheries • Tracking status and shifts in production between major functional groups. • 14 major groups

  27. Acres Disturbed: Km2 disturbed expanded from observer data 2007 1997

More Related