International Council for the Exploration of the Sea
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Working Group on Multispecies Assessment Methods (WGSAM; outputs from 2022 meeting)

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posted on 2024-01-25, 08:07 authored by ICESICES


The Working Group on Multispecies Assessment Methods (WGSAM) aims to advance the operational use of knowledge on predator-prey interactions for advice on fisheries and ecosystem management. 

This report presents an update of the multispecies SMS keyrun model for the Baltic Sea including its review by the working group, and the review of three modelling frameworks for the Georges Bank marine ecosystem. The Baltic Sea keyrun provides updated estimates of cod predation mortality for the Baltic Sea sprat and central Baltic herring stocks. The model integrates fishery and survey data on the two clupeids and makes extensive use of the cod stomach data (i.e. 64 000 stomachs are used as input to the model). Estimations of predation mortality are consistent with previous estimates and suitable for inclusion in the stock assessment of the two clupeid stocks. Predation remains low on all ages for both herring and sprat as a result of the low cod stock size. The large modelling framework for the Georges Bank comprises a multispecies production model, a multispecies length-based model and a mass-balanced ecosystem model. While none of the three models was at that stage to be evaluated as a keyrun, with further development they could complementarily and in conjunction contribute to the EBFM of the Georges Bank.


Published under the auspices of the following ICES Steering Group or Committee


Published under the auspices of the following ICES Expert Group or Strategic Initiative



ICES Scientific Reports





Contributors (Editors)

Valerio Bartolino • Michael Spence

Contributors (Authors)

Alan Baudron • Alex Holdgate • Alfonso Perez • Andrea Belgrano • Andy Beet • Carolyn McKeon • Chris Legault • Christina Perez • Christopher Griffiths • Floor Soudijn • Francisco De Castro • Gavin Fay • Gustav Delius • Howard Townsend • Jacob Bentley • James Martindale • Jamie Lentin • Jamie Tam • Kiersten Curti • Liesa Celie • Maria Ching Villanueva • Marianne Robert • Marie Savina Rolland • Maxwell Grezlik • Michael Spence • Michael Thomson • Mikaela Potier • Miriam Puts • Morten Vinther • Robert Gamble • Robert Thorpe • Ron Klasky • Roweena Patel • Sarah Gaichas • Sean Lucey • Sigrid Lehuta • Thomas Del Santo O’Neill • Valerio Bartolino • Vanessa Trijoulet



Recommended citation

ICES. 2023. Working Group on Multispecies Assessment Methods (WGSAM; outputs from 2022 meeting). ICES Scientific Reports. 5:12. 233 pp.

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  • en

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  • PDF

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