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WORKING GROUP on MIXED FISHERIES METHODOLOGY (WGMIXFISH-METHODS; Outputs from 2020 Meeting) WORKING GROUP ON MIXED FISHERIES METHODOLOGY (WGMIXFISH-METHODS; outputs from 2020 meeting) VOLUME 3 | ISSUE 39 ICES SCIENTIFIC REPORTS RAPPORTS SCIENTIFIQUES DU CIEM ICES INTERNATIONAL COUNCIL FOR THE EXPLORATION OF THE SEA CIEM CONSEIL INTERNATIONAL POUR L’EXPLORATION DE LA MER International Council for the Exploration of the Sea Conseil International pour l’Exploration de la Mer H.C. Andersens Boulevard 44-46 DK-1553 Copenhagen V Denmark Telephone (+45) 33 38 67 00 Telefax (+45) 33 93 42 15 www.ices.dk [email protected] ISSN number: 2618-1371 This document has been produced under the auspices of an ICES Expert Group or Committee. The contents therein do not necessarily represent the view of the Council. © 2021 International Council for the Exploration of the Sea. This work is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). For citation of datasets or conditions for use of data to be included in other databases, please refer to ICES data policy. ICES Scientific Reports Volume 3 | Issue 39 WORKING GROUP ON MIXED FISHERIES METHODOLOGY (WGMIXFISH- METHODS; outputs from 2020 meeting) Recommended format for purpose of citation: ICES. 2021. Working Group on Mixed Fisheries Methodology (WGMIXFISH-METHODS ; outputs from 2020 meeting). ICES Scientific Reports. 3:39. 232 pp. https://doi.org/10.17895/ices.pub.8040 Editor Claire Moore Authors Mikel Aristegui Ezquibela • Michel Bertignac • Paul Bouch • Florence Britton • Thomas Brunel • Sofia Carlshamre • Harriet Cole • Paul Dolder • Niall Fallon • Dorleta Garcia • Olga Kalinina • Ruth Kelly Alexandros Kokkalis • Sarah Kraak • Mathieu Lundy • Johan Lövgren • Claire Marcher • Hugo Mendes Alessandro Orio • Lionel Pawlowski • Alfonso Pérez-Rodríguez • Paz Sampedro • Shawna Sanfey Cristina Silva • Andreas Sundelöf • Klass Sys • Marc Taylor • Vanessa Trijoulet • Youen Vermard ICES | WGMIXFISH-METHODS 2020 | I Contents i Executive summary ................................................................................................................... iii ii Expert group information .......................................................................................................... iv 1 Introduction ............................................................................................................................... 5 Terms of Reference .................................................................................................................... 5 2 ToR A - Continue improvement of WGMIXFISH-ADVICE workflow, updating associated documentation and increasing transparency ............................................................................. 7 2.1 Overview ...................................................................................................................... 7 2.2 Bay of Biscay ................................................................................................................. 7 2.3 Celtic Sea ...................................................................................................................... 8 2.4 North Sea ...................................................................................................................... 8 2.5 Iberian Waters .............................................................................................................. 9 2.6 Irish Sea ........................................................................................................................ 9 2.7 Kattegat ........................................................................................................................ 9 3 ToR B - Respond to the outcomes of the Mixed Fisheries Scoping Meeting .............................. 10 3.1 Summary of workshop ................................................................................................ 10 3.2 Advancing methodology ............................................................................................. 11 3.2.1 Beyond short-term forecasting: Ongoing applications in the North Sea ...................... 11 3.2.2 Providing Integrated Total Catch Advice for the Management of Mixed Fisheries with an Eco-viability Approach .................................................................................... 12 3.2.3 Can we take account of technical interactions at haul level? ....................................... 12 3.2.4 Projections and simulations featuring gear changes should account for the “Rosa Lee effect” ........................................................................................................ 12 3.2.5 Global Sensitivity Analysis of a complex multi-stock and multi-fleet simulation model: Application to Iberian Waters case study. ....................................................... 15 3.2.6 Management of target and bycatch species in Bay of Biscay ....................................... 16 3.2.7 Using FLBEIA in an EBFM context in the Celtic Sea ...................................................... 16 3.2.8 Estimating catchability trends ..................................................................................... 17 3.2.9 An evaluation of multispecies management strategies ............................................... 17 3.2.10 Inclusion of West of Scotland into the North Sea FCube model ................................... 18 4 ToR C - Respond to the outcomes and issues encountered during WGMIXFISH-ADVICE........... 19 4.1 Celtic Sea .................................................................................................................... 19 4.1.1 Incorporation of Nephrops .......................................................................................... 19 4.1.2 Forecasts .................................................................................................................... 21 4.1.3 Celtic Sea FLBEIA ......................................................................................................... 22 4.1.4 WKCELTIC ................................................................................................................... 23 4.2 North Sea .................................................................................................................... 24 4.2.1 Documentation ........................................................................................................... 24 4.2.2 Adapting the FIDES scenario for FLBEIA ...................................................................... 25 4.2.3 Looking to parallelise the range scenario for FLBEIA ................................................... 25 4.2.4 Comparing non-FIDES scenarios between FLBEIA and FCube ...................................... 27 4.2.5 Extension of North Sea Fcube into the West of Scotland ............................................. 31 4.2.6 Incorporation of data poor species ............................................................................. 31 4.3 Iberian Waters ............................................................................................................ 32 5 ToR D - Review of updated data call, identifying possible areas of improvements .................... 34 6 TOR E - Assess the fleet and métier definition in the Bay of Biscay fisheries ............................. 35 6.1 French demersal fleets typology used to parameterize the IAM simulation model ......................................................................................................................... 35 6.2 Fleet and métier typology based on landing and effort data provided under the ICES Accession data call .............................................................................................. 37 ii | ICES SCIENTIFIC REPORTS 3: 39 | ICES 6.3 Which way forward for the definition of fleet and métier for the Bay of Biscay for the next MIXFISH-ADVICE working groups? ........................................................... 40 7 ToR F - Development of mixed fisheries advice in new areas ................................................... 42 7.1 Irish Sea FCube............................................................................................................ 42 7.1.1 Background ................................................................................................................. 42 7.1.2 Implementation .......................................................................................................... 42 7.1.3 Next steps ................................................................................................................... 42 7.1.4 Summary .................................................................................................................... 43 7.2 Kattegat ...................................................................................................................... 43 8 ToR G - Continued development of the combined implementation of FCube and FLBEIA in conjugation with STECF/WGECON economists ..................................................................... 44 9 References ............................................................................................................................... 45 Annex 1: Celtic Sea FLBIEA ......................................................................................................... 46 Annex 2: North Sea and West of Scotland implementation ..................................................... 107 1.Introduction ........................................................................................................................ 107 1.1. Cod
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