1. Meetings
  2. Scientific Committee (SC) Meetings
  3. Technical Working Group on Chub Mackerel Stock Assessment (TWG CMSA)
  4. 10th TWG CMSA meeting

10th TWG CMSA meeting

    Location
    Virtual
    Short Name
    TWG CMSA10
    Date
    -
    Registration Due
    Meeting Papers Due
    Meeting Information File
    NPFC-2025-TWG CMSA10-MIP01 Meeting Information.pdf195.35 KB
    Meeting Report File for Public
    TWG CMSA10 Report.pdf338.14 KB
    1. Opening of the Meeting
    2. Adoption of Agenda
    3. Overview of the recommendations and outcomes of previous NPFC meetings
     
    3.1 TWG CMSA09
     
    3.2 Intersessional meetings of TWG CMSA
     
    3.3 SC09
    4. Discussion on discrepancies between the input data for the 2024 stock assessment and reported values in Annual Summary Footprint
     
    4.1 Review of how to revise data and results
     
    4.2 How to present the updated results of SAM
     
    4.3 Timeline for developing advice to COM based on recommendation from SC09
    5. Members fishery status and research activities
    6. Review of stock assessment for CM
     
    6.1 Member’s stock assessment
     
    6.2 2024 stock assessment by TWG CMSA
    7. Update of biological information
     
    7.1 Maturity-at-age and natural mortalities
     
    7.2 Finalization of biological parameters for stock assessment in TWG CMSA11
    8. Fishery and biological data for stock assessment
     
    8.1 Catch-at-age
     
     
    8.1.1 Length frequency, catch-at-length/size and age-length key
     
     
    8.1.2 Calculation of catch-at-age
     
    8.2 Weight-at-age
     
    8.3 Finalization of fishery and biological data for stock assessment in TWG CMSA11
    9. Abundance indices
     
    9.1 Update of abundance indices submitted by Members
     
    9.2 Usage of abundance indices in the 2025 stock assessment
     
    9.3 Finalization of abundance indices for stock assessment in TWG CMSA11
    10. Settings and specifications of SAM
     
    10.1 Review of current settings and specifications
     
    10.2 Discussion towards finalization of settings and specifications
    11. Biological reference points
     
    11.1 Methods to calculate biological reference points
     
    11.2 List of reference points for stock assessment in TWG CMSA11
    12. Future projection of chub mackerel
     
    12.1 Methods to conduct future projection
    13. Initiation of discussion on management strategy evaluation (MSE) for CM
    14. Review of the Work Plan of the TWG CMSA
     
    14.1 Discussion on possible changes in TWG CMSA meeting schedule to include most recent data into stock assessment
    15. Other matters
     
    15.1 Timeline and intersessional activities before TWG CMSA11
     
    15.2 Observer Program
     
     
    15.2.1 Review of data or data description on fisheries bycatch in chub mackerel fisheries
     
    15.3 Species summary
     
    15.4 Other issues
    15. Adoption of Report
    16. Close of the Meeting
    No documents listed
    NPFC-2025-TWG CMSA10-MIP02 (Rev. 1)
    		Provisional Agenda NPFC-2025-TWG CMSA10-MIP02(Rev1) Provisional Agenda.pdf164.65 KB
    NPFC-2025-TWG CMSA10-MIP03 (Rev. 1)
    		Annotated Indicative Schedule NPFC-2025-TWG CMSA10-MIP03(Rev1) Annotated Indicative Schedule_0.pdf178.63 KB
    No documents listed
    3.1 TWG CMSA09
    9th TWG CMSA meeting report (click for LINK)
    3.2 Intersessional meetings of TWG CMSA
    No documents listed
    3.3 SC09
    SC09 meeting report (click for LINK)
    No documents listed
    4.1 Review of how to revise data and results
    NPFC-2025-TWG CMSA10-IP08
    		Details on discrepancy of Japanese catch and its solution NPFC-2025-TWG CMSA10-IP08 Catch discrepancy and solution_Jpn.pdf2.12 MB
    4.2 How to present the updated results of SAM
    No documents listed
    4.3 Timeline for developing advice to COM based on recommendation from SC09
    No documents listed
    NPFC-2025-TWG CMSA10-IP01
    		Chub Mackerel Catch in Canada (updated for 2024) NPFC-2025-TWG CMSA10-IP01 ChubMackerelCatchCanada.pdf278.01 KB
    NPFC-2025-TWG CMSA10-IP02
    		Chub mackerel Russian fishery in the northwest Pacific Ocean Pacific Ocean, research activities in 2024 NPFC-2025-TWG CMSA10-IP02 CM fishery and research activities in 2024_Rus.pdf8.21 MB
    NPFC-2025-TWG CMSA10-IP03
    		Review of chub mackerel fishery in China and research activities NPFC-2025-TWG CMSA10-IP03 Review of chub mackerel fishery in China in 2024.pdf2.79 MB
    NPFC-2025-TWG CMSA10-IP04
    		Recent fishery and stock status of chub mackerel from Japan NPFC-2025-TWG CMSA10-IP04 CM fishery_Jpn_0.pdf1.66 MB
    No documents listed
    6.1 Member’s stock assessment
    No documents listed
    6.2 2024 stock assessment by TWG CMSA
    No documents listed
    No documents listed
    7.1 Maturity-at-age and natural mortalities
    NPFC-2025-TWG CMSA10-IP05
    		Updated Maturity at age from Japan NPFC-2025-TWG CMSA10-IP05 Updated MAA_Jpn.pdf335.41 KB
    NPFC-2025-TWG CMSA10-IP06
    		Progress report on the study of maturity at age of Chub mackerel NPFC-2025-TWG CMSA10-IP06 Progress report of MAA_Jpn.pdf986.38 KB
    7.2 Finalization of biological parameters for stock assessment in TWG CMSA11
    No documents listed
    No documents listed
    8.1 Catch-at-age
    NPFC-2025-TWG CMSA10-WP03
    		The estimation method and data on catch, weight, and maturity at age of the chub mackerel caught by Japan up to CY2024 Q2 NPFC-2025-TWG CMSA10-WP03 Catch-at-age_Jpn.docx2.09 MB
    8.1.1 Length frequency, catch-at-length/size and age-length key
    No documents listed
    8.1.2 Calculation of catch-at-age
    No documents listed
    8.2 Weight-at-age
    No documents listed
    8.3 Finalization of fishery and biological data for stock assessment in TWG CMSA11
    No documents listed
    No documents listed
    9.1 Update of abundance indices submitted by Members
    NPFC-2025-TWG CMSA10-WP05
    		Standardized Abundance Indices for Ages 0 and 1 Fish of Chub Mackerel from Northwest Pacific Autumn Surveys up to 2024 NPFC-2025-TWG CMSA10-WP05 AutumnSurvey_Jpn.docx5.37 MB, NPFC-2025-TWG CMSA10-WP05 AutumnSurvey_ppt.pdf3.13 MB
    NPFC-2025-TWG CMSA10-WP06
    		Standardized CPUE of Japanese commercial dip-net fishery targeting spawners of chub mackerel in the Northwest Pacific up to 2024 NPFC-2025-TWG CMSA10-WP06 DipNetCPUE_Jpn.docx2.94 MB, NPFC-2025-TWG CMSA10-WP06 Standardized_Index_dipnet_ppt.pdf2.95 MB
    NPFC-2024-TWG CMSA10-WP07 (Rev. 1)
    		Standardizing monthly egg survey data as an abundance index for spawning stock biomass of chub mackerel in the Northwest Pacific NPFC-2025-TWG CMSA10-WP07(Rev1) EggSurvey_Jpn.docx2.6 MB, NPFC-2025-TWG CMSA10-WP07 Egg survey ppt.pdf3.58 MB
    NPFC-2025-TWG CMSA10-WP08
    		Standardized abundance index for recruitment of chub mackerel from Northwest Pacific summer surveys up to 2024 NPFC-2025-TWG CMSA10-WP08 SummerSurvey_Jpn.docx4.94 MB, NPFC-2025-TWG CMSA10-WP08 Index_summer_ppt.pdf2.64 MB
    NPFC-2025-TWG CMSA10-WP09
    		Standardized CPUE of Chub mackerel (Scomber japonicas) caught by the China’s lighting purse seine fishery up to 2023 NPFC-2025-TWG CMSA10-WP09 Standardized CPUE of CM up to 2023_Chn.pdf3.18 MB
    9.2 Usage of abundance indices in the 2025 stock assessment
    No documents listed
    9.3 Finalization of abundance indices for stock assessment in TWG CMSA11
    No documents listed
    No documents listed
    10.1 Review of current settings and specifications
    No documents listed
    10.2 Discussion towards finalization of settings and specifications
    No documents listed
    No documents listed
    11.1 Methods to calculate biological reference points
    No documents listed
    11.2 List of reference points for stock assessment in TWG CMSA11
    No documents listed
    No documents listed
    12.1 Methods to conduct future projection
    No documents listed
    No documents listed
    NPFC-2025-TWG CMSA10-WP01
    		TWG CMSA Work Plan, 2025-2029 NPFC-2025-TWG CMSA10-WP01 TWG CMSA Work Plan.docx267.54 KB
    14.1 Discussion on possible changes in TWG CMSA meeting schedule to include most recent data into stock assessment
    No documents listed
    No documents listed
    15.1 Timeline and intersessional activities before TWG CMSA11
    No documents listed
    15.2 Observer Program
    No documents listed
    15.2.1 Review of data or data description on fisheries bycatch in chub mackerel fisheries
    NPFC-2025-TWG CMSA10-WP04
    		Bycatch information in chub mackerel fisheries from the Japanese fisheries NPFC-2025-TWG CMSA10-WP04 Bycatch_Jpn.docx333.98 KB
    NPFC-2025-TWG CMSA10-IP07
    		Bycatch of chub mackerel fishery in China NPFC-2025-TWG CMSA10-IP07 Bycatch CM fishery in China in 2024.pdf395.45 KB
    15.3 Species summary
    NPFC-2025-TWG CMSA10-WP02 (Rev. 1)
    		Species summary for chub mackerel NPFC-2025-TWG CMSA10-WP02(Rev1) Species summary for chub mackerel.docx719.63 KB
    15.4 Other issues
    No documents listed
    No documents listed
    No documents listed
    Document Number Title File Created
    NPFC-2025-TWG CMSA10-MIP02 (Rev. 1) Provisional Agenda NPFC-2025-TWG CMSA10-MIP02(Rev1) Provisional Agenda.pdf164.65 KB
    NPFC-2025-TWG CMSA10-MIP03 (Rev. 1) Annotated Indicative Schedule NPFC-2025-TWG CMSA10-MIP03(Rev1) Annotated Indicative Schedule_0.pdf178.63 KB
    NPFC-2025-TWG CMSA10-WP01 TWG CMSA Work Plan, 2025-2029 NPFC-2025-TWG CMSA10-WP01 TWG CMSA Work Plan.docx267.54 KB
    NPFC-2025-TWG CMSA10-WP02 (Rev. 1) Species summary for chub mackerel NPFC-2025-TWG CMSA10-WP02(Rev1) Species summary for chub mackerel.docx719.63 KB
    NPFC-2025-TWG CMSA10-WP03 The estimation method and data on catch, weight, and maturity at age of the chub mackerel caught by Japan up to CY2024 Q2 NPFC-2025-TWG CMSA10-WP03 Catch-at-age_Jpn.docx2.09 MB
    NPFC-2025-TWG CMSA10-WP04 Bycatch information in chub mackerel fisheries from the Japanese fisheries NPFC-2025-TWG CMSA10-WP04 Bycatch_Jpn.docx333.98 KB
    NPFC-2025-TWG CMSA10-WP05 Standardized Abundance Indices for Ages 0 and 1 Fish of Chub Mackerel from Northwest Pacific Autumn Surveys up to 2024 NPFC-2025-TWG CMSA10-WP05 AutumnSurvey_Jpn.docx5.37 MB, NPFC-2025-TWG CMSA10-WP05 AutumnSurvey_ppt.pdf3.13 MB
    NPFC-2025-TWG CMSA10-WP06 Standardized CPUE of Japanese commercial dip-net fishery targeting spawners of chub mackerel in the Northwest Pacific up to 2024 NPFC-2025-TWG CMSA10-WP06 DipNetCPUE_Jpn.docx2.94 MB, NPFC-2025-TWG CMSA10-WP06 Standardized_Index_dipnet_ppt.pdf2.95 MB
    NPFC-2024-TWG CMSA10-WP07 (Rev. 1) Standardizing monthly egg survey data as an abundance index for spawning stock biomass of chub mackerel in the Northwest Pacific NPFC-2025-TWG CMSA10-WP07(Rev1) EggSurvey_Jpn.docx2.6 MB, NPFC-2025-TWG CMSA10-WP07 Egg survey ppt.pdf3.58 MB
    NPFC-2025-TWG CMSA10-WP08 Standardized abundance index for recruitment of chub mackerel from Northwest Pacific summer surveys up to 2024 NPFC-2025-TWG CMSA10-WP08 SummerSurvey_Jpn.docx4.94 MB, NPFC-2025-TWG CMSA10-WP08 Index_summer_ppt.pdf2.64 MB
    NPFC-2025-TWG CMSA10-WP09 Standardized CPUE of Chub mackerel (Scomber japonicas) caught by the China’s lighting purse seine fishery up to 2023 NPFC-2025-TWG CMSA10-WP09 Standardized CPUE of CM up to 2023_Chn.pdf3.18 MB
    NPFC-2025-TWG CMSA10-IP01 Chub Mackerel Catch in Canada (updated for 2024) NPFC-2025-TWG CMSA10-IP01 ChubMackerelCatchCanada.pdf278.01 KB
    NPFC-2025-TWG CMSA10-IP02 Chub mackerel Russian fishery in the northwest Pacific Ocean Pacific Ocean, research activities in 2024 NPFC-2025-TWG CMSA10-IP02 CM fishery and research activities in 2024_Rus.pdf8.21 MB
    NPFC-2025-TWG CMSA10-IP03 Review of chub mackerel fishery in China and research activities NPFC-2025-TWG CMSA10-IP03 Review of chub mackerel fishery in China in 2024.pdf2.79 MB
    NPFC-2025-TWG CMSA10-IP04 Recent fishery and stock status of chub mackerel from Japan NPFC-2025-TWG CMSA10-IP04 CM fishery_Jpn_0.pdf1.66 MB
    NPFC-2025-TWG CMSA10-IP05 Updated Maturity at age from Japan NPFC-2025-TWG CMSA10-IP05 Updated MAA_Jpn.pdf335.41 KB
    NPFC-2025-TWG CMSA10-IP06 Progress report on the study of maturity at age of Chub mackerel NPFC-2025-TWG CMSA10-IP06 Progress report of MAA_Jpn.pdf986.38 KB
    NPFC-2025-TWG CMSA10-IP07 Bycatch of chub mackerel fishery in China NPFC-2025-TWG CMSA10-IP07 Bycatch CM fishery in China in 2024.pdf395.45 KB
    NPFC-2025-TWG CMSA10-IP08 Details on discrepancy of Japanese catch and its solution NPFC-2025-TWG CMSA10-IP08 Catch discrepancy and solution_Jpn.pdf2.12 MB
    9th TWG CMSA meeting report (click for LINK)
    SC09 meeting report (click for LINK)