11th TWG CMSA meeting

Location

Shanghai, China

Short Name

TWG CMSA11

Date

15-Jul-2025, 9:00 AM - 18-Jul-2025, 6:00 PM CST

Registration Due

04-Jul-2025 05:00 PM CST

Meeting Papers Due

16-Jun-2025 05:00 PM CST

Meeting Information File

NPFC-2025-SSC NFS02-MIP01(Rev3) Meeting Information_1.pdf

Meeting Report File for Public

TWG CMSA11 report.pdf

Agenda

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

Documents by Agenda

1. Opening of the Meeting

	No documents listed

2. Adoption of Agenda

NPFC-2025-TWG CMSA11-MIP02 10-Jun-2025	Provisional Agenda	NPFC-2025-TWG CMSA11-MIP02 Provisional Agenda.pdf
NPFC-2025-TWG CMSA11-MIP03 (Rev. 2) 10-Jun-2025	Annotated Indicative Schedule	NPFC-2025-TWG CMSA11-MIP03(Rev2) Annotated Indicative Schedule.pdf

3. Overview of the recommendations and outcomes of previous NPFC meetings relevant to chub mackerel

	No documents listed

3.1 TWG CMSA10

NPFC-2025-TWG CMSA10-Final Report 02-Jul-2025	10th TWG CMSA meeting report (click for LINK)

3.2 Intersessional meetings of TWG CMSA

NPFC-2025-TWG CMSA11-RP01 02-Jul-2025	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.pdf
NPFC-2025-TWG CMSA11-RP02 02-Jul-2025	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.pdf

3.3 SC09

	SC09 meeting report (click for LINK)

3.4 COM09

NPFC-2025-COM09-Final Report 02-Jul-2025	COM09 meeting report (click for LINK)

3.4.1 Tasks from COM09 to TWG CMSA

	No documents listed

4. Members’ fishery status and research activities

NPFC-2025-TWG CMSA11-IP01 20-Jun-2025	Recent fishery and stock status of chub mackerel from Japan	NPFC-2025-TWG CMSA11-IP01 Recent Fishery and Stock Status of CHUB JP.pdf
NPFC-2025-TWG CMSA11-IP03 23-Jun-2025	Chub Mackerel Catch in Canada updated for 2024	NPFC-2025-TWG CMSA11-IP03 Chub Mackerel Catch Canada 2024.pdf
NPFC-2025-TWG CMSA11-IP04 04-Jul-2025	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.pdf
NPFC-2025-TWG CMSA11-WP11 05-Jul-2025	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.pdf
NPFC-2025-TWG CMSA11-IP05 10-Jul-2025	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.pdf
NPFC-2025-TWG CMSA11-WP12 14-Jul-2025	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.docx, NPFC-2025-TWG CMSA11-WP12 Standardized CPUE ppt_0.pdf

4.1 Bycatch information

NPFC-2025-TWG CMSA11-IP02 20-Jun-2025	Russian by-catch data from Chub mackerel fisheries in the Northwest Pacific	NPFC-2025-TWG CMSA11-IP02 Bycatch CM fisheries_Rus.pdf
NPFC-2025-TWG CMSA11-IP06 10-Jul-2025	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.pdf

5. Review of results of stock assessment using State-space stock assessment model (SAM)

	No documents listed

5.1 Review of data used for stock assessment

NPFC-2025-TWG_CMSA11-WP03 Rev.1 17-Jun-2025	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.docx, NPFC-2025-TWG CMSA11-WP03 SuppDoc.1 Input_data_presentation_0.pdf
NPFC-2025-TWG CMSA11-WP04 17-Jun-2025	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.docx, NPFC-2025-TWG CMSA11-WP04 SuppDoc.1 Discrepancy_0.pdf
NPFC-2025-TWG CMSA11-WP05 20-Jun-2025	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.docx

5.2 Confirmation of setting and specification of SAM

	No documents listed

5.3 Review of stock assessment results

NPFC-2025-TWG CMSA11-WP06 27-Jun-2025	Candidate Base Case Scenarios for the 2025 Chub Mackerel Stock Assessment in the Northwest Pacific Ocean	NPFC-2025-TWG CMSA11-WP06 Candidate_basecases_2025.docx, SAM_basecase_proposal ppt.pdf
NPFC-2025-TWG CMSA11-WP08 30-Jun-2025	What caused the increase in retrospective pattern in the chub mackerel stock assessment in the Northwest Pacific?	NPFC-2025-TWG CMSA11-WP08 RetroPattern.docx, sam-retro-ppt.pdf
NPFC-2025-TWG CMSA11-WP07 09-Jul-2025	Sensitivity analyses of the 2025 chub mackerel stock assessment in the Northwest Pacific Ocean	NPFC-2025-TWG CMSA11-WP07_sam_sensitivity.docx, sam-sensitivity-ppt.pdf

5.4 Discussion on base cases and representative cases

	No documents listed

6. Future projections and biological reference points

	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 09-Jul-2025	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.docx, future-projection ppt.pdf

6.3 Discussion on contents to be shown in the stock assessment report in response to the tasks from COM09

	No documents listed

7. Stock assessment report

	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

8. Response to the tasks from COM09

	No documents listed

8.1 Task #1

	No documents listed

8.2 Task #2

	No documents listed

9. Data collection and management

	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

10. Review of the Work Plan for the TWG CMSA

	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 17-Jul-2025	TWG CMSA Work Plan, 2025-2029	NPFC-2025-TWG CMSA11-WP01 TWG CMSA Work Plan.docx

10.4 NPFC Performance Review recommendations

	No documents listed

11. Other matters

	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) 11-Jul-2025	Chub mackerel species summary	NPFC-2025-TWG CMSA11-WP02(Rev1) Chub mackerel species summary.docx

11.3 Invited expert

	No documents listed

11.4 Other issues

NPFC-2025-TWG CMSA11-WP10 27-Jun-2025	Review of the maturity criterion using gonad index in Pacific stock chub mackerel	NPFC-2025-TWG CMSA11-WP10 CM maturity.docx
NPFC-2025-TWG CMSA11-WP13 14-Jul-2025	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.docx

12. Recommendations to the Scientific Committee

	No documents listed

13. Adoption of Meeting Report

	No documents listed

14. Close of the Meeting

	No documents listed

All Documents

Document Number	Title	File	Created
NPFC-2025-TWG CMSA11-MIP02	Provisional Agenda	NPFC-2025-TWG CMSA11-MIP02 Provisional Agenda.pdf	10-Jun-2025
NPFC-2025-TWG CMSA11-MIP03 (Rev. 2)	Annotated Indicative Schedule	NPFC-2025-TWG CMSA11-MIP03(Rev2) Annotated Indicative Schedule.pdf	10-Jun-2025
NPFC-2025-TWG CMSA011-WP01	TWG CMSA Work Plan, 2025-2029	NPFC-2025-TWG CMSA11-WP01 TWG CMSA Work Plan.docx	17-Jul-2025
NPFC-2025-TWG CMSA11-WP02 (Rev. 1)	Chub mackerel species summary	NPFC-2025-TWG CMSA11-WP02(Rev1) Chub mackerel species summary.docx	11-Jul-2025
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.docx, NPFC-2025-TWG CMSA11-WP03 SuppDoc.1 Input_data_presentation_0.pdf	17-Jun-2025
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.docx, NPFC-2025-TWG CMSA11-WP04 SuppDoc.1 Discrepancy_0.pdf	17-Jun-2025
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.docx	20-Jun-2025
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.docx, SAM_basecase_proposal ppt.pdf	27-Jun-2025
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.docx, sam-sensitivity-ppt.pdf	09-Jul-2025
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.docx, sam-retro-ppt.pdf	30-Jun-2025
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.docx, future-projection ppt.pdf	09-Jul-2025
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.docx	27-Jun-2025
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.pdf	05-Jul-2025
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.docx, NPFC-2025-TWG CMSA11-WP12 Standardized CPUE ppt_0.pdf	14-Jul-2025
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.docx	14-Jul-2025
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.pdf	20-Jun-2025
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.pdf	20-Jun-2025
NPFC-2025-TWG CMSA11-IP03	Chub Mackerel Catch in Canada updated for 2024	NPFC-2025-TWG CMSA11-IP03 Chub Mackerel Catch Canada 2024.pdf	23-Jun-2025
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.pdf	04-Jul-2025
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.pdf	10-Jul-2025
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.pdf	10-Jul-2025
NPFC-2025-TWG CMSA10-Final Report	10th TWG CMSA meeting report (click for LINK)		02-Jul-2025
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.pdf	02-Jul-2025
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.pdf	02-Jul-2025
NPFC-2025-COM09-Final Report	COM09 meeting report (click for LINK)		02-Jul-2025
	SC09 meeting report (click for LINK)		03-Jul-2025