Working Group on Mixed Fisheries Advice Methodology (WGMIXFISH-METHODS)

Alessandro  Orio; Bernhard  Kühn; Claire  Macher; Claire  Moore; Daisuke Goto; Dorleta Garcia; Emma  Bowen; Gianfranco  Anastasi; Harriet Cole; Hugo  Mendes; Katell  Hamon; Klaas  Sys; Marc  Taylor; Marianne  Robert; Matra  Cousido; Mathieu  Merzéréaud; Matthew  Pace; Paul  Dolder; Sonia  Sánchez-Maroño; Thomas Brunel; Vanessa  Trijoulet; Youen  Vermard

doi:10.17895/ices.pub.33733921

Working Group on Mixed Fisheries Advice Methodology (WGMIXFISH-METHODS)

Alessandro Orio
, Bernhard Kühn
, Claire Macher
, Claire Moore
, Daisuke Goto
, Dorleta Garcia
, Emma Bowen
, Gianfranco Anastasi
, Harriet Cole
, Hugo Mendes
, Katell Hamon
, Klaas Sys
, Marc Taylor
, Marianne Robert
, Matra Cousido
, Mathieu Merzéréaud
, Matthew Pace
, Paul Dolder
, Sonia Sánchez-Maroño
, Thomas Brunel

Vanessa Trijoulet, Youen Vermard

School of Ocean Sciences

Research output: Book/Report › Commissioned report

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Abstract

The ICES Working Group on Mixed Fisheries Methodology (WGMIXFISH-METHODS) met to progress work on the improvement and development of the mixed fisheries considerations.

The work addressed in 2026 included improving workflows for the advice process, presenting methodological advances and responding to issues encountered during WGMIXFISH-ADVICE 2025. The group reviewed the annual data call and processing procedures and discussed improved communication of mixed fishery advice products and collaborations with other working groups, notably the ICES Working Group on Economics (WGECON).

The primary development affecting data workflows is the planned introduction of the Regional DataBase and Estimation System (RDBES) to support stock assessments carried out in ICES. In 2027, RDBES will gradually replace InterCatch and the current ad hoc mixed fisheries data call, providing WGMIXFISH with data at a greater level of disaggregation than is currently possible. Whereas this presents an opportunity to improve the quality of mixed fisheries analyses carried out by the working group, the transition to RDBES is challenging because new processes are needed to assemble the inputs to mixed fisheries models. The working group continued the work of 2025 with a continued exploration of the RDBES data in the context of mixed fisheries.

Several methodological advances were presented, many of which address outstanding limitations of current approaches or stakeholder feedback received during mixed fisheries scoping workshops. These included the implementation of an age-structured mixed fisheries model framework for the Celtic Sea case study, the development of generic hindcast process as tool for model evaluation, and a presentation on how to speed-up mixed fisheries MSEs.

Finally, each case study addressed outcomes and issues encountered during the previous year in preparation for WGMIXFISH-ADVICE 2026.

Original language	English
Publisher	ICES Scientific Reports
Number of pages	46
Volume	8
DOIs	https://doi.org/10.17895/ices.pub.33733921
Publication status	Published - 14 Sept 2026

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 14 Life Below Water

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Orio, A., Kühn, B., Macher, C., Moore, C., Goto, D., Garcia, D., Bowen, E., Anastasi, G., Cole, H., Mendes, H., Hamon, K., Sys, K., Taylor, M., Robert, M., Cousido, M., Merzéréaud, M., Pace, M., Dolder, P., Sánchez-Maroño, S., ... Vermard, Y. (2026). Working Group on Mixed Fisheries Advice Methodology (WGMIXFISH-METHODS). ICES Scientific Reports. https://doi.org/10.17895/ices.pub.33733921

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abstract = "The ICES Working Group on Mixed Fisheries Methodology (WGMIXFISH-METHODS) met to progress work on the improvement and development of the mixed fisheries considerations. The work addressed in 2026 included improving workflows for the advice process, presenting methodological advances and responding to issues encountered during WGMIXFISH-ADVICE 2025. The group reviewed the annual data call and processing procedures and discussed improved communication of mixed fishery advice products and collaborations with other working groups, notably the ICES Working Group on Economics (WGECON). The primary development affecting data workflows is the planned introduction of the Regional DataBase and Estimation System (RDBES) to support stock assessments carried out in ICES. In 2027, RDBES will gradually replace InterCatch and the current ad hoc mixed fisheries data call, providing WGMIXFISH with data at a greater level of disaggregation than is currently possible. Whereas this presents an opportunity to improve the quality of mixed fisheries analyses carried out by the working group, the transition to RDBES is challenging because new processes are needed to assemble the inputs to mixed fisheries models. The working group continued the work of 2025 with a continued exploration of the RDBES data in the context of mixed fisheries. Several methodological advances were presented, many of which address outstanding limitations of current approaches or stakeholder feedback received during mixed fisheries scoping workshops. These included the implementation of an age-structured mixed fisheries model framework for the Celtic Sea case study, the development of generic hindcast process as tool for model evaluation, and a presentation on how to speed-up mixed fisheries MSEs. Finally, each case study addressed outcomes and issues encountered during the previous year in preparation for WGMIXFISH-ADVICE 2026.",

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Orio, A, Kühn, B, Macher, C, Moore, C, Goto, D, Garcia, D, Bowen, E, Anastasi, G, Cole, H, Mendes, H, Hamon, K, Sys, K, Taylor, M, Robert, M, Cousido, M, Merzéréaud, M, Pace, M, Dolder, P, Sánchez-Maroño, S, Brunel, T, Trijoulet, V & Vermard, Y 2026, Working Group on Mixed Fisheries Advice Methodology (WGMIXFISH-METHODS). vol. 8, ICES Scientific Reports. https://doi.org/10.17895/ices.pub.33733921

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AU - Orio, Alessandro

AU - Kühn, Bernhard

AU - Macher, Claire

AU - Moore, Claire

AU - Goto, Daisuke

AU - Garcia, Dorleta

AU - Bowen, Emma

AU - Anastasi, Gianfranco

AU - Cole, Harriet

AU - Mendes, Hugo

AU - Hamon, Katell

AU - Sys, Klaas

AU - Taylor, Marc

AU - Robert, Marianne

AU - Cousido, Matra

AU - Merzéréaud, Mathieu

AU - Pace, Matthew

AU - Dolder, Paul

AU - Sánchez-Maroño, Sonia

AU - Brunel, Thomas

AU - Trijoulet, Vanessa

AU - Vermard, Youen

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N2 - The ICES Working Group on Mixed Fisheries Methodology (WGMIXFISH-METHODS) met to progress work on the improvement and development of the mixed fisheries considerations. The work addressed in 2026 included improving workflows for the advice process, presenting methodological advances and responding to issues encountered during WGMIXFISH-ADVICE 2025. The group reviewed the annual data call and processing procedures and discussed improved communication of mixed fishery advice products and collaborations with other working groups, notably the ICES Working Group on Economics (WGECON). The primary development affecting data workflows is the planned introduction of the Regional DataBase and Estimation System (RDBES) to support stock assessments carried out in ICES. In 2027, RDBES will gradually replace InterCatch and the current ad hoc mixed fisheries data call, providing WGMIXFISH with data at a greater level of disaggregation than is currently possible. Whereas this presents an opportunity to improve the quality of mixed fisheries analyses carried out by the working group, the transition to RDBES is challenging because new processes are needed to assemble the inputs to mixed fisheries models. The working group continued the work of 2025 with a continued exploration of the RDBES data in the context of mixed fisheries. Several methodological advances were presented, many of which address outstanding limitations of current approaches or stakeholder feedback received during mixed fisheries scoping workshops. These included the implementation of an age-structured mixed fisheries model framework for the Celtic Sea case study, the development of generic hindcast process as tool for model evaluation, and a presentation on how to speed-up mixed fisheries MSEs. Finally, each case study addressed outcomes and issues encountered during the previous year in preparation for WGMIXFISH-ADVICE 2026.

AB - The ICES Working Group on Mixed Fisheries Methodology (WGMIXFISH-METHODS) met to progress work on the improvement and development of the mixed fisheries considerations. The work addressed in 2026 included improving workflows for the advice process, presenting methodological advances and responding to issues encountered during WGMIXFISH-ADVICE 2025. The group reviewed the annual data call and processing procedures and discussed improved communication of mixed fishery advice products and collaborations with other working groups, notably the ICES Working Group on Economics (WGECON). The primary development affecting data workflows is the planned introduction of the Regional DataBase and Estimation System (RDBES) to support stock assessments carried out in ICES. In 2027, RDBES will gradually replace InterCatch and the current ad hoc mixed fisheries data call, providing WGMIXFISH with data at a greater level of disaggregation than is currently possible. Whereas this presents an opportunity to improve the quality of mixed fisheries analyses carried out by the working group, the transition to RDBES is challenging because new processes are needed to assemble the inputs to mixed fisheries models. The working group continued the work of 2025 with a continued exploration of the RDBES data in the context of mixed fisheries. Several methodological advances were presented, many of which address outstanding limitations of current approaches or stakeholder feedback received during mixed fisheries scoping workshops. These included the implementation of an age-structured mixed fisheries model framework for the Celtic Sea case study, the development of generic hindcast process as tool for model evaluation, and a presentation on how to speed-up mixed fisheries MSEs. Finally, each case study addressed outcomes and issues encountered during the previous year in preparation for WGMIXFISH-ADVICE 2026.

U2 - 10.17895/ices.pub.33733921

DO - 10.17895/ices.pub.33733921

M3 - Commissioned report

VL - 8

BT - Working Group on Mixed Fisheries Advice Methodology (WGMIXFISH-METHODS)

PB - ICES Scientific Reports

ER -

Working Group on Mixed Fisheries Advice Methodology (WGMIXFISH-METHODS)

Abstract

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