Published on September 14, 2007
Trends in North Pacific Cod and Pollock: James N. Ianelli Alaska Fisheries Science Center Seattle, WA Trends in North Pacific Cod and Pollock Trends in North Pacific Cod and Pollock Outline: Outline Alaska pollock: Gulf of Alaska Eastern Bering Sea Bogoslof and Aleutian Islands region Russian zone Recent US-Russian negotiations Pacific cod World pollock catch 1981-2002: North America Asia Donut Hole World pollock catch 1981-2002 Pollock Fishery Areas: Pollock Fishery Areas Kamchatka EBS NBS WBS Sea of Okhotsk Aleutians Est. 2002 Pollock Catch by area: Est. 2002 Pollock Catch by area Total: ~2.57 million t Conservation Strategies: Conservation Strategies Key Quota management acronyms ABC’s (acceptable biological catch) TAC’s (total allowable catch) OFL’s (overfishing levels) Gulf of Alaska: Gulf of Alaska Gulf of Alaska pollock age 3+ biomass trend: Gulf of Alaska pollock age 3+ biomass trend Thousands of tons 2002 survey estimate low—but 1999 yearclass well above average Gulf of Alaska summary: Gulf of Alaska summary Winter 2002 survey estimates low… 2001 TAC 105.8 thousand tons, 2002 TAC 58.25 thousand tons, 2003 likely to be between 40-60 thousand tons 1999 year class well above average Steller sea-lions likely to affect TAC-setting in this area Eastern Bering Sea Pollock: Eastern Bering Sea Pollock Eastern Bering Sea Pollock: Eastern Bering Sea Pollock Biomass trends Highly dependent on recruitment Both highly variable Three surveys in 2002: Limited shelf acoustic survey in winter Summer trawl and acoustic surveys Issues : Extent of straddling stock Steller sea lions Fishery Characteristics for 2002: Fishery Characteristics for 2002 Within-year production (E. Bering Sea): Within-year production (E. Bering Sea) 2002 Winter fishery distribution: 2002 Winter fishery distribution Catch size distribution: Catch size distribution Jan-June July - Dec 2002 survey data… : 2002 survey data… Pollock density from bottom-trawl survey: Pollock density from bottom-trawl survey Bottom temperature and pollock density…: Bottom temperature and pollock density… Slide19: Bottom-trawl survey abundance at age: Bottom-trawl survey abundance at age Results from integrated model Recruitment estimates… : Results from integrated model Recruitment estimates… EBS Biomass trend: EBS Biomass trend Change in age-composition estimates: Change in age-composition estimates Age Steller sea lion population update: Steller sea lion population update Sea Lion issues : Sea Lion issues NEPA, ESA compliance problems by NMFS Species still listed as 'endangered' Action that may affect recovery of species identified (fishing) Consultation may be required for the Gulf of Alaska pollock (and other) fisheries Ecosystem issues : Ecosystem issues Committee reviewing North Pacific TAC-setting process relative to ecosystem needs Report due to Council in December May look to Antarctic system (CCAMLR) for meeting perceived ecosystem requirements Environmental factors increasing in application to all fish-stock assessments Long-term and short-term productivity Other issues : Other issues Marine Stewardship Council Final announcement delayed to early next year Eastern Bering Sea pollock apparently passed ok Essential Fish Habitat requirements Pollock fishery important since mid-water Cooperative acoustic data collection established To monitor pollock abundance in Critical Habitat Acoustic return…: Acoustic return… Relative sA: Survey vs Fishery: Relative sA: Survey vs Fishery Aleutian Islands Region: Aleutian Islands Region Aleutian Islands Region: Aleutian Islands Region Pollock stock surveyed poorly Bottom trawl gear Every 2 years 2002 estimate ~360,000 tons (andgt; double estimate from 1990s) Pollock as bycatch only since 1999 for sea lion concerns Last year quota expectation for 2002 ~25,000 tons NOT! Set to bycatch only again… Pollock prognosis for 2003: bycatch Aleutian Islands recent surveys: Aleutian Islands recent surveys Basin or “Donut Hole” Region: Basin or 'Donut Hole' Region Central Bering Sea Convention Some experimental fishing/surveys Poor catch rates Bogoslov survey index of this stock still low Estimates of over 1 million tons may trigger an International Basin fishery Recruitment patterns appear to have changed Non contiguous parties wish for a quota Closures since 1992 Recovery not apparent Bogoslov survey estimates: Bogoslov survey estimates Millions of tons Russian Zone: Russian Zone Catch, Survey information Central Bering Sea consultation Russian stock condition:Navarin basin biomass estimates: Russian stock condition: Navarin basin biomass estimates Russian stock condition: Western Bering Sea biomass trend: Russian stock condition: Western Bering Sea biomass trend Thousands of tons age 2+ Russian stock conditionSpawning stock size in Sea of Okhotsk: Russian stock condition Spawning stock size in Sea of Okhotsk Thousands of tons US-Russian bilateral meetings: US-Russian bilateral meetings 'The disputed agreement of 1990 was signed by Eduard Shevardnadze, then USSR Minister of Foreign Affairs, and James Baker, US Secretary of State, for the USA to overtake an approximate 50,000 square kilometres of sea from Russia. The strip abounds in fish. Russia's State Fishing Committee experts estimate the annual catch of Pacific pollock alone at 200,000 tons. The agreement cost Russia an approximate 2.8 million tons of fish at more than US$1.4 billion, complain experts.' Sept 2002 Moscow ICC meeting report: Sept 2002 Moscow ICC meeting report '… The U.S. delegation made clear that the United States is not prepared to review or renegotiate the maritime boundary treaty, though the U.S. was prepared to discuss other areas of cooperation.' Observed catch: Observed catch Russian quota breakdown for 2002Total 930,000 tons: Russian quota breakdown for 2002 Total 930,000 tons Pollock Summary: Pollock Summary Gulf of Alaska 2001 summer and 2002 winter survey estimates low Good sign of 1999 year class (impact expected by 2004) TAC prognosis again about ~50 kt Aleutian Islands Stocks Increasing Steller sea lion issues close to resolution TAC may be re-instated ~35,000 t Aleutian Basin - Bogoslof: Fishery continues to be unlikely in near future Eastern Bering Sea Stock outlook on track in near term, ABC expected to decline 1996 year-class not as prevalent in recent surveys 2003 TAC likely to be around 1,480 kt Russia: Sea of Okhotsk and other areas may be undergoing species shift Herring Quota reductions may increase illegal fishing Pacific Cod Abundance trends: Pacific Cod Abundance trends Sea lion issues also concern Pacific cod: Sea lion issues also concern Pacific cod P. cod and Atka mackerel considered with pollock as essential for sea lions Issue was the level of concentrations during spawning seasons within Critical Habitat Due to the higher complexity, management problems more difficult Multiple gear-types and fishing sectors Pacific Cod Outlook 2002: Pacific Cod Outlook 2002 Gulf of Alaska projected ABC/TAC stable or slight increase Eastern Bering Sea ABC/TAC likely to be flat Strong year classes evident but survey estimate lower Russian Pacific cod considered stable and small EBS Pacific cod biomass trend: EBS Pacific cod biomass trend
Trends in North Pacific Cod and Pollock Trends in North Pacific Cod and Pollock James N. Ianelli Alaska Fisheries Science Center Seattle, WA Outline Alaska ...
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