Participate in assessments of shared species by the International Scientific Committee (ISC)

Project H.6.a - Participate in assessments of shared species by the International Scientific Committee (ISC)

Ongoing

Program(s) in charge: Stock Assessment Program

Funded

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Theme 3. Sustainable fisheries
Goal H. Improve and implement stock assessments, based on the best available science
Target H.6. Maintain active participation in ISC stock assessments

Objectives

Staff participation in development and improvement of assessments for North Pacific-wide species of interest to the IATTC, especially Pacific bluefin and albacore tunas, but also billfishes and sharks
Understand the assessment results, and communicate them to the Commission

Background

The ISC and its various working groups assess stocks in the north Pacific that are covered by both the IATTC and WCPFC
The IATTC staff provides data and advice for the assessments
Assessments are periodic, and the stocks assessed differ each year.

Relevance for management

The IATTC uses the results of the ISC assessments to provide management advice

Duration

Ongoing; ISC meets annually, usually in July

Workplan and status

See ISC website for details (http://isc.fra.go.jp/)

External collaborators

ISC

Deliverables

Report to SAC meetings

Updated date: 01 May 2023

Progress summary for the reporting period

February 2020: submitted a working paper for the Billfish working group
March 2020: Attended the virtual Pacific bluefin working group workshop. New benchmark assessment developed.
August/September 2020 and December 2020: Attended the virtual Albacore working group workshops about the progress on Management Strategy Evaluation
February 2021: Started a Basecamp North Pacific Albacore MSE – ISC albacore working group discussions for managers and other stakeholder
March 2021: Attended the 5th North Pacific Albacore MSE Workshop;, the objectives were: (i) help managers and stakeholders understand MSE results, (ii) get feedback to ALBWG on the presentation of MSE results.
March 2021: Made a presentation to the Billfish working group on the “1th technical workshop on S EPO swordfish, Stock structure of swordfish in the Pacific Ocean”
April 2021: Participated in the north Pacific bluefin working group meeting
December 2021: Attended the virtual billfish working group data preparation workshop to prepare data inputs for the 2022 striped marlin stock assessment.
May 2022: Attended the webinar of the North Pacific Albacore Working Group. Collaborated on a working paper.
November 2022: participated in the shortfin mako working group meeting on biological assumptions. Assisted with the development of the shortfin mako conceptual model with provision of habitat use and post release survival data.
November 2022: Attended the virtual billfish working group data preparation workshop to prepare fishery and biological data inputs for the 2023 North Pacific swordfish stock assessment.
December 2022: Attended the virtual billfish working group biological data workshop on billfish ageing.
December 2022: Made a presentation on the use of conceptual models to improve stock assessment models at the Shark Working group meeting (Shimizu, Japan).
December 2022: Attended the North Pacific Albacore Working Group data preparatory meeting. The goal of the meeting was to review the inputs to the 2024 stock assessment (Yokohama, Japan).
March 2023: Attended the Bluefin Tuna Working Group meeting. The goals of the meeting were to evaluate the data for the next benchmark assessment and discuss MSE
March 2023: Attended the North Pacific Albacore Working Group meeting. The goal of the meeting was to conduct the stock assessment (La Jolla, USA).
April 2023: Attended the Billfish Working Group meeting. The goals of the meeting were to revise the conservation information for striped marlin and to conduct the stock assessment of the north Pacific swordfish (Honolulu, USA).

See working group reports on the ISC website