Valerio Bartolino, Alan Baudron, Andrea Belgrano, Xochitl Cormon, Francisco DeCastro, Thomas Del Santo O’Neill, Sarah Gaichas, Daniel Howell, Alexander Kempf, Nataliia Kulatska, Sigrid Lehuta, Sean Lucey, Vidette McGregor, Miriam Püts, Anna Rindorf, Nis Sand Jacobsen, Anika Sonjudottir, Floor Soudijn, Michael Spence, Klaas SysBjarki Thor Elvarsson, Robert Thorpe, Vanessa Trijoulet, Ching Villanueva, Morten Vinther

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The Working Group on Multispecies Assessment Methods (WGSAM) aims at enabling research on predator-prey interactions for developing advice on the ecosystem approach to fisheries management.

This report details results related to WGSAM term of reference B: “Update of key-runs (standardized model runs updated with recent data) of multispecies and ecosystem models for different ICES regions”. Multispecies model key-runs are used in ICES advice processes, and WGSAM provides critical expert review of these key-runs to recommend appropriate use of results.

Although key-run reviews have been conducted in the past, requests for reviews are increasing. Therefore, WGSAM first formalized a consistent set of review criteria to conduct key-run reviews. These are outlined in section 2 of this report and are posted online ( WGSAM then applied these review criteria to one key-run for the North Sea ecosystem. The review is detailed in section 3 of this report. As the review criteria were applied, WGSAM also noted any difficulties with the review process in order to further refine the review criteria and to make future key-run reviews more efficient and effective.

WGSAM recommends the use of natural mortality estimates from the North Sea SMS key-run for use in single species stock assessment models of North Sea cod, haddock, herring, Norway pout, southern North Sea sandeel, northern North Sea sandeel, sprat, and whiting.
Original languageEnglish
Place of PublicationCopenhagen, Denmark
PublisherInternational Council for the Exploration of the Sea (ICES)
Number of pages231
Publication statusPublished - 2021
SeriesICES Scientific Report


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