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Widow rockfish update prompts supplemental review after large productivity change
Summary
The widow rockfish 2025 update shows lower productivity than the 2019 update, driven by revised recruitment and age data; the Groundfish Subcommittee and SSC recommended a supplemental review to analyze spatial structure, data inputs and model options.
Owen Hammel, instructor and co-lead reviewer for the widow rockfish update, presented results that differ substantially from the 2019 update and called for further review. Key points:
- Current estimates: 2025 age-4 biomass ~83,000–84,000 metric tons and stock status ~55% fraction unfished spawning output. - Changes since 2019: the large 2013 recruitment estimated in the 2019 update is not supported by data through 2024; bottom-trawl surveys show more…
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