1. Meetings
  2. Scientific Committee (SC) Meetings
  3. Technical Working Group on Chub Mackerel Stock Assessment (TWG CMSA)
  4. 11th TWG CMSA meeting

11th TWG CMSA meeting

    Location
    Shanghai, China
    Short Name
    TWG CMSA11
    Date
    -
    Registration Due
    Meeting Papers Due
    Meeting Information File
    NPFC-2025-SSC NFS02-MIP01(Rev3) Meeting Information_1.pdf388.34 KB
    Meeting Report File for Public
    TWG CMSA11 report.pdf3.74 MB
    1. Opening of the Meeting
    2. Adoption of Agenda
    3. Overview of the recommendations and outcomes of previous NPFC meetings relevant to chub mackerel
     
    3.1 TWG CMSA10
     
    3.2 Intersessional meetings of TWG CMSA
     
    3.3 SC09
     
    3.4 COM09
     
     
    3.4.1 Tasks from COM09 to TWG CMSA
    4. Members’ fishery status and research activities
     
    4.1 Bycatch information
    5. Review of results of stock assessment using State-space stock assessment model (SAM)
     
    5.1 Review of data used for stock assessment
     
    5.2 Confirmation of setting and specification of SAM
     
    5.3 Review of stock assessment results
     
    5.4 Discussion on base cases and representative cases
    6. Future projections and biological reference points
     
    6.1 Confirmation of projection methods and scenarios
     
    6.2 Review of projection results
     
    6.3 Discussion on contents to be shown in the stock assessment report in response to the tasks from COM09
    7. Stock assessment report
     
    7.1 Review of draft executive summary
     
     
    7.1.1 Stock status
     
     
    7.1.2 Management advice
     
     
    7.1.3 Others
     
    7.2 Review of draft stock assessment report
     
    7.3 Work assignments to finalize the report towards SC10 meeting
    8. Response to the tasks from COM09
     
    8.1 Task #1
     
    8.2 Task #2
    9. Data collection and management
     
    9.1 Data provision templates
     
    9.2 Update on GitHub repository and user manual
     
    9.3 Observer Program
    10. Review of the Work Plan for the TWG CMSA
     
    10.1 Climate change related issues
     
    10.2 Options to minimize the time lag between the terminal year of the stock assessment and the management decisions
     
    10.3 Work Plan of the TWG CMSA
     
    10.4 NPFC Performance Review recommendations
    11. Other matters
     
    11.1 Timeline and intersessional activities before TWG CMSA12
     
    11.2 Species summary
     
    11.3 Invited expert
     
    11.4 Other issues
    12. Recommendations to the Scientific Committee
    13. Adoption of Meeting Report
    14. Close of the Meeting
    No documents listed
    NPFC-2025-TWG CMSA11-MIP02
    		Provisional Agenda NPFC-2025-TWG CMSA11-MIP02 Provisional Agenda.pdf183.7 KB
    NPFC-2025-TWG CMSA11-MIP03 (Rev. 2)
    		Annotated Indicative Schedule NPFC-2025-TWG CMSA11-MIP03(Rev2) Annotated Indicative Schedule.pdf217.27 KB
    No documents listed
    3.1 TWG CMSA10
    NPFC-2025-TWG CMSA10-Final Report
    		10th TWG CMSA meeting report (click for LINK)
    3.2 Intersessional meetings of TWG CMSA
    NPFC-2025-TWG CMSA11-RP01
    		Summary of the 1st Intersessional Meeting of the Technical Working Group on Chub Mackerel Stock Assessment NPFC-2025-TWG CMSA11-RP01 TWG CMSAint01 mtng summary.pdf624.47 KB
    NPFC-2025-TWG CMSA11-RP02
    		Summary of the 2nd Intersessional Meeting of the Technical Working Group on Chub Mackerel Stock Assessment NPFC-2025-TWG CMSA11-RP02 TWG CMSAint02 mtng summary.pdf371.8 KB
    3.3 SC09
    SC09 meeting report (click for LINK)
    3.4 COM09
    NPFC-2025-COM09-Final Report
    		COM09 meeting report (click for LINK)
    3.4.1 Tasks from COM09 to TWG CMSA
    No documents listed
    NPFC-2025-TWG CMSA11-IP01
    		Recent fishery and stock status of chub mackerel from Japan NPFC-2025-TWG CMSA11-IP01 Recent Fishery and Stock Status of CHUB JP.pdf1.14 MB
    NPFC-2025-TWG CMSA11-IP03
    		Chub Mackerel Catch in Canada updated for 2024 NPFC-2025-TWG CMSA11-IP03 Chub Mackerel Catch Canada 2024.pdf383.96 KB
    NPFC-2025-TWG CMSA11-IP04
    		Chub mackerel Russian fishery in the northwest Pacific Ocean Pacific Ocean, research activities in 2024-2025 NPFC-2025-TWG CMSA11-IP04 CM fishery and research_Rus.pdf1.36 MB
    NPFC-2025-TWG CMSA11-WP11
    		Chub mackerel biology information from Song Hang survey in the Northwest Pacific from 2021 to 2024 NPFC-2025-TWG CMSA11-WP11 Chub mackerel biology from survey_CHN.pdf788.79 KB
    NPFC-2025-TWG CMSA11-IP05
    		Review of chub mackerel fishery in China and research activities in 2024-2025 NPFC-2025-TWG CMSA11-IP05 Review of chub mackerel fishery in China in 2024-2025.pdf10.55 MB
    NPFC-2025-TWG CMSA11-WP12
    		Standardized CPUE of Chub mackerel (Scomber japonicus) caught by the China’s lighting purse seine fishery up to 2024 NPFC-2025-TWG CMSA11-WP12 Standardized CPUE of CM up to 2024_CHN_0.docx5.98 MB, NPFC-2025-TWG CMSA11-WP12 Standardized CPUE ppt_0.pdf1.05 MB
    4.1 Bycatch information
    NPFC-2025-TWG CMSA11-IP02
    		Russian by-catch data from Chub mackerel fisheries in the Northwest Pacific NPFC-2025-TWG CMSA11-IP02 Bycatch CM fisheries_Rus.pdf186.51 KB
    NPFC-2025-TWG CMSA11-IP06
    		Data description on fisheries bycatch in the chub mackerel fisheries in China NPFC-2025-TWG CMSA11-IP06 Data description on fisheries bycatch in the chub mackerel fisheries in China.pdf695.74 KB
    No documents listed
    5.1 Review of data used for stock assessment
    NPFC-2025-TWG_CMSA11-WP03 Rev.1
    		The data description for the base case stock assessment of chub mackerel Scomber japonicus in the northwestern Pacific Ocean for 2025 assessment NPFC-2025-TWG CMSA11-WP03 Rev.1 Data_description.docx1.58 MB, NPFC-2025-TWG CMSA11-WP03 SuppDoc.1 Input_data_presentation_0.pdf1.73 MB
    NPFC-2025-TWG CMSA11-WP04
    		Details and resolution on the discrepancy of annual footprint and sum of product of catch at age and weight at age from China, Japan, and Russia NPFC-2025-TWG_CMSA11-WP04_Discrepancy.docx1.2 MB, NPFC-2025-TWG CMSA11-WP04 SuppDoc.1 Discrepancy_0.pdf671.75 KB
    NPFC-2025-TWG CMSA11-WP05
    		Standardized CPUE of Russian commercial trawl fishery of chub mackerel in the Northwest Pacific up to 2024 NPFC-2025-TWG CMSA11-WP05 Standardized_CPUE_Rus.docx792.36 KB
    5.2 Confirmation of setting and specification of SAM
    No documents listed
    5.3 Review of stock assessment results
    NPFC-2025-TWG CMSA11-WP06
    		Candidate Base Case Scenarios for the 2025 Chub Mackerel Stock Assessment in the Northwest Pacific Ocean NPFC-2025-TWG CMSA11-WP06 Candidate_basecases_2025.docx7.86 MB, SAM_basecase_proposal ppt.pdf5.88 MB
    NPFC-2025-TWG CMSA11-WP08
    		What caused the increase in retrospective pattern in the chub mackerel stock assessment in the Northwest Pacific? NPFC-2025-TWG CMSA11-WP08 RetroPattern.docx636.47 KB, sam-retro-ppt.pdf1.39 MB
    NPFC-2025-TWG CMSA11-WP07
    		Sensitivity analyses of the 2025 chub mackerel stock assessment in the Northwest Pacific Ocean NPFC-2025-TWG CMSA11-WP07_sam_sensitivity.docx1.63 MB, sam-sensitivity-ppt.pdf1.53 MB
    5.4 Discussion on base cases and representative cases
    No documents listed
    No documents listed
    6.1 Confirmation of projection methods and scenarios
    No documents listed
    6.2 Review of projection results
    NPFC-2025-TWG CMSA11-WP09
    		Biological reference points and future projections in the 2025 stock assessment for the Northwestern Pacific chub mackerel NPFC-2025-TWG CMSA11-WP09_Future_projection_0.docx7.7 MB, future-projection ppt.pdf3.81 MB
    6.3 Discussion on contents to be shown in the stock assessment report in response to the tasks from COM09
    No documents listed
    No documents listed
    7.1 Review of draft executive summary
    No documents listed
    7.1.1 Stock status
    No documents listed
    7.1.2 Management advice
    No documents listed
    7.1.3 Others
    No documents listed
    7.2 Review of draft stock assessment report
    No documents listed
    7.3 Work assignments to finalize the report towards SC10 meeting
    No documents listed
    No documents listed
    8.1 Task #1
    No documents listed
    8.2 Task #2
    No documents listed
    No documents listed
    9.1 Data provision templates
    No documents listed
    9.2 Update on GitHub repository and user manual
    No documents listed
    9.3 Observer Program
    No documents listed
    No documents listed
    10.1 Climate change related issues
    No documents listed
    10.2 Options to minimize the time lag between the terminal year of the stock assessment and the management decisions
    No documents listed
    10.3 Work Plan of the TWG CMSA
    NPFC-2025-TWG CMSA011-WP01
    		TWG CMSA Work Plan, 2025-2029 NPFC-2025-TWG CMSA11-WP01 TWG CMSA Work Plan.docx265.59 KB
    10.4 NPFC Performance Review recommendations
    No documents listed
    No documents listed
    11.1 Timeline and intersessional activities before TWG CMSA12
    No documents listed
    11.2 Species summary
    NPFC-2025-TWG CMSA11-WP02 (Rev. 1)
    		Chub mackerel species summary NPFC-2025-TWG CMSA11-WP02(Rev1) Chub mackerel species summary.docx778 KB
    11.3 Invited expert
    No documents listed
    11.4 Other issues
    NPFC-2025-TWG CMSA11-WP10
    		Review of the maturity criterion using gonad index in Pacific stock chub mackerel NPFC-2025-TWG CMSA11-WP10 CM maturity.docx1.34 MB
    NPFC-2025-TWG CMSA11-WP13
    		Analysis of identification method for gonadal maturity and MAA calculation methods on Chub mackerel in China NPFC-2025-TWG CMSA11-WP13 CM maturity and MAA calculation_CNH.docx791.42 KB
    No documents listed
    No documents listed
    No documents listed
    Document Number Title File Created
    NPFC-2025-TWG CMSA11-MIP02 Provisional Agenda NPFC-2025-TWG CMSA11-MIP02 Provisional Agenda.pdf183.7 KB
    NPFC-2025-TWG CMSA11-MIP03 (Rev. 2) Annotated Indicative Schedule NPFC-2025-TWG CMSA11-MIP03(Rev2) Annotated Indicative Schedule.pdf217.27 KB
    NPFC-2025-TWG CMSA011-WP01 TWG CMSA Work Plan, 2025-2029 NPFC-2025-TWG CMSA11-WP01 TWG CMSA Work Plan.docx265.59 KB
    NPFC-2025-TWG CMSA11-WP02 (Rev. 1) Chub mackerel species summary NPFC-2025-TWG CMSA11-WP02(Rev1) Chub mackerel species summary.docx778 KB
    NPFC-2025-TWG_CMSA11-WP03 Rev.1 The data description for the base case stock assessment of chub mackerel Scomber japonicus in the northwestern Pacific Ocean for 2025 assessment NPFC-2025-TWG CMSA11-WP03 Rev.1 Data_description.docx1.58 MB, NPFC-2025-TWG CMSA11-WP03 SuppDoc.1 Input_data_presentation_0.pdf1.73 MB
    NPFC-2025-TWG CMSA11-WP04 Details and resolution on the discrepancy of annual footprint and sum of product of catch at age and weight at age from China, Japan, and Russia NPFC-2025-TWG_CMSA11-WP04_Discrepancy.docx1.2 MB, NPFC-2025-TWG CMSA11-WP04 SuppDoc.1 Discrepancy_0.pdf671.75 KB
    NPFC-2025-TWG CMSA11-WP05 Standardized CPUE of Russian commercial trawl fishery of chub mackerel in the Northwest Pacific up to 2024 NPFC-2025-TWG CMSA11-WP05 Standardized_CPUE_Rus.docx792.36 KB
    NPFC-2025-TWG CMSA11-WP06 Candidate Base Case Scenarios for the 2025 Chub Mackerel Stock Assessment in the Northwest Pacific Ocean NPFC-2025-TWG CMSA11-WP06 Candidate_basecases_2025.docx7.86 MB, SAM_basecase_proposal ppt.pdf5.88 MB
    NPFC-2025-TWG CMSA11-WP07 Sensitivity analyses of the 2025 chub mackerel stock assessment in the Northwest Pacific Ocean NPFC-2025-TWG CMSA11-WP07_sam_sensitivity.docx1.63 MB, sam-sensitivity-ppt.pdf1.53 MB
    NPFC-2025-TWG CMSA11-WP08 What caused the increase in retrospective pattern in the chub mackerel stock assessment in the Northwest Pacific? NPFC-2025-TWG CMSA11-WP08 RetroPattern.docx636.47 KB, sam-retro-ppt.pdf1.39 MB
    NPFC-2025-TWG CMSA11-WP09 Biological reference points and future projections in the 2025 stock assessment for the Northwestern Pacific chub mackerel NPFC-2025-TWG CMSA11-WP09_Future_projection_0.docx7.7 MB, future-projection ppt.pdf3.81 MB
    NPFC-2025-TWG CMSA11-WP10 Review of the maturity criterion using gonad index in Pacific stock chub mackerel NPFC-2025-TWG CMSA11-WP10 CM maturity.docx1.34 MB
    NPFC-2025-TWG CMSA11-WP11 Chub mackerel biology information from Song Hang survey in the Northwest Pacific from 2021 to 2024 NPFC-2025-TWG CMSA11-WP11 Chub mackerel biology from survey_CHN.pdf788.79 KB
    NPFC-2025-TWG CMSA11-WP12 Standardized CPUE of Chub mackerel (Scomber japonicus) caught by the China’s lighting purse seine fishery up to 2024 NPFC-2025-TWG CMSA11-WP12 Standardized CPUE of CM up to 2024_CHN_0.docx5.98 MB, NPFC-2025-TWG CMSA11-WP12 Standardized CPUE ppt_0.pdf1.05 MB
    NPFC-2025-TWG CMSA11-WP13 Analysis of identification method for gonadal maturity and MAA calculation methods on Chub mackerel in China NPFC-2025-TWG CMSA11-WP13 CM maturity and MAA calculation_CNH.docx791.42 KB
    NPFC-2025-TWG CMSA11-IP01 Recent fishery and stock status of chub mackerel from Japan NPFC-2025-TWG CMSA11-IP01 Recent Fishery and Stock Status of CHUB JP.pdf1.14 MB
    NPFC-2025-TWG CMSA11-IP02 Russian by-catch data from Chub mackerel fisheries in the Northwest Pacific NPFC-2025-TWG CMSA11-IP02 Bycatch CM fisheries_Rus.pdf186.51 KB
    NPFC-2025-TWG CMSA11-IP03 Chub Mackerel Catch in Canada updated for 2024 NPFC-2025-TWG CMSA11-IP03 Chub Mackerel Catch Canada 2024.pdf383.96 KB
    NPFC-2025-TWG CMSA11-IP04 Chub mackerel Russian fishery in the northwest Pacific Ocean Pacific Ocean, research activities in 2024-2025 NPFC-2025-TWG CMSA11-IP04 CM fishery and research_Rus.pdf1.36 MB
    NPFC-2025-TWG CMSA11-IP05 Review of chub mackerel fishery in China and research activities in 2024-2025 NPFC-2025-TWG CMSA11-IP05 Review of chub mackerel fishery in China in 2024-2025.pdf10.55 MB
    NPFC-2025-TWG CMSA11-IP06 Data description on fisheries bycatch in the chub mackerel fisheries in China NPFC-2025-TWG CMSA11-IP06 Data description on fisheries bycatch in the chub mackerel fisheries in China.pdf695.74 KB
    NPFC-2025-TWG CMSA10-Final Report 10th TWG CMSA meeting report (click for LINK)
    NPFC-2025-TWG CMSA11-RP01 Summary of the 1st Intersessional Meeting of the Technical Working Group on Chub Mackerel Stock Assessment NPFC-2025-TWG CMSA11-RP01 TWG CMSAint01 mtng summary.pdf624.47 KB
    NPFC-2025-TWG CMSA11-RP02 Summary of the 2nd Intersessional Meeting of the Technical Working Group on Chub Mackerel Stock Assessment NPFC-2025-TWG CMSA11-RP02 TWG CMSAint02 mtng summary.pdf371.8 KB
    NPFC-2025-COM09-Final Report COM09 meeting report (click for LINK)
    SC09 meeting report (click for LINK)