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Interim Report of the Stock Identification Methods Working Group (SIMWG)

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Interim Report of the Stock Identification Methods Working Group (SIMWG) ICES SIMWG REPORT 2015 SCICOM STEERING GROUP ON ECOSYSTEM PRESSURES AND IMPACTS ICES CM 2015/SSGEPI:13 REF. ACOM, SCICOM Interim Report of the Stock Identification Methods Working Group (SIMWG) 10-12 June 2015 Portland, Maine, USA 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] Recommended format for purposes of citation: ICES. 2015. Interim Report of the Stock Identification Methods Working Group (SIMWG), 10–12 June 2015, Portland, Maine, USA. ICES CM 2015/SSGEPI:13. 67 pp. For permission to reproduce material from this publication, please apply to the Gen- eral Secretary. The document is a report of an Expert Group under the auspices of the International Council for the Exploration of the Sea and does not necessarily represent the views of the Council. © 2015 International Council for the Exploration of the Sea ICES SIMWG REPORT 2015 | i Contents Executive summary ................................................................................................................ 3 1 Administrative details .................................................................................................. 4 2 Terms of Reference ........................................................................................................ 4 3 Summary of Work plan ................................................................................................ 4 4 List of Outcomes and Achievements of the WG in this delivery period ............ 4 5 Progress report on ToRs and workplan ..................................................................... 5 5.1 ToR a) Review recent advances in stock identification methods ................... 5 5.1.1 Genetic Analysis ...................................................................................... 5 5.1.2 Life history parameters ........................................................................... 6 5.1.3 Body Morphometrics ............................................................................... 7 5.1.4 Tagging (conventional, acoustic, satellite)............................................ 7 5.1.5 Growth marks in calcified structures .................................................... 9 5.1.6 Otolith Shape ............................................................................................ 9 5.1.7 Otolith Chemistry .................................................................................. 10 5.1.8 Parasites .................................................................................................. 11 5.1.9 Early life stages ...................................................................................... 12 5.1.10 Simulation approaches .......................................................................... 13 5.1.11 Interdisciplinary analysis ...................................................................... 14 5.2 ToR b) Build a reference database with updated information on known biological stocks for species of ICES interest ..................................... 16 5.2.1 Summary of workplan and progress on database............................. 16 5.2.2 Technical reviews ................................................................................... 17 5.3 ToR c) Review and report on advances in mixed stock analysis, and assess their potential role in improving precision of stock assessment. .......................................................................................................... 17 6 References ..................................................................................................................... 21 7 Revisions to the work plan and justification ......................................................... 28 8 Next meetings ............................................................................................................... 28 Annex 1: List of participants............................................................................................... 29 Annex 2: Recommendations ............................................................................................... 30 Annex 3: Agenda ................................................................................................................... 31 Annex 4: ToR B – Tables ..................................................................................................... 33 Annex 5: Evaluation of Greater Silver Smelt Stock Identity in ICES Subareas I, II, IV, VI, VII, VIII, IX, X, XII and XIV and Divisions IIIa and Vb ............................................................................................................................ 38 ii | ICES SIMWG REPORT 2015 Annex 6: Evaluation of Plaice Stock Identity in ICES sub-area IIIa and Adjacent Areas ............................................................................................................. 42 Annex 7: Evaluation of Haddock Stock Identity in ICES Subareas IV and VIa (North Sea and West of Scotland) ..................................................................... 48 Annex 8: Evaluation of European Anchovy Stock Identity in ICES Division IXa ................................................................................................................................... 56 Annex 9: Evaluation of Megrim Stock Identity in ICES Subareas VIIIc and IXa ................................................................................................................................... 62 ICES SIMWG REPORT 2015 | 3 Executive summary The Stock Identification Methods Working Group (SIMWG) held a meeting at the Gulf of Maine Research Institute in Portland, Maine (USA) on 10–12 June 2015. The work plan for SIMWG in 2015 comprised three Terms of Reference (ToR), most of which, being multiannual, will require additional work over the coming years: a ) Review recent advances in stock identification methods; b ) Build a reference database with updated information on known biologi- cal stocks for species of ICES interest; (1) Technical reviews and expert opinions on matters of stock identification, as requested by specific Working Groups and SCICOM; c ) Review and report on advances in mixed stock analysis, and assess their potential role in improving precision of stock assessment. ToR a) is a key, ongoing task of SIMWG in which we provide a comprehensive update on recent applications of stock identification techniques to ICES species of interest, summa- rize new approaches in stock identification, and novel combinations of existing applica- tions. ToR b) is a multi-annual ToR in which SIMWG is taking steps to build a reference data- base consisting of SIMWG reviews of issues of stock identity for ICES species. Under this ToR we have also addressed specific requests by ICES working groups for technical ad- vice on issues of stock identity. Specifically, we provided advice on the following species: 1) haddock Melanogrammus aeglefinus (as requested by WKHAD), 2) megrim Lepidorhom- bus whiffiagonis (as requested by WGBIE), and 3) anchovy Engraulis encrasicolus (as re- quested by WGHANSA). Two additional species were reviewed by correspondence over the past year: 1) greater silver smelt Argentina silus (as requested by ADGDEEP), and 2) plaice Pleuronectes platessa (as requested by WKPLE). ToR c) is a multi-annual ToR that is focused on tracking developments in the application of mixed stock analysis and the integration of this information into assessment and man- agement. 4 | ICES SIMWG REPORT 2015 1 Administrative details Name of the Working Group Stock Identification Methods Working Group (SIMWG) Year of Appointment: 2014 Reporting year within current cycle: 2 Chair(s) Lisa Kerr, USA Meeting venue Portland, Maine USA Meeting dates 10–12 June 2015 2 Terms of Reference SIMWGs multiannual ToRs are as follows: a ) Review recent advances in stock identification methods; b ) Build a reference database with updated information on known biologi- cal stocks for species of ICES interest; (1) Technical reviews and expert opinions on matters of stock identification, as requested by specific Working Groups and SCICOM; c ) Review and report on advances in mixed stock analysis, and assess their potential role in improving precision of stock assessment. 3 Summary of Work plan Year 1 Organise a physical meeting for SIMWG for summer 2015, trying to identify a period of the year that would allow best coordination with benchmarking processes. Establish working agreement with ICES web designers for delivery of ToR b. Year 2 Focus primarily on ToR b and assess personnel commitment and feasibility of ToR c. Year 3 Complete the first version of ToR c. 4 List of Outcomes and Achievements of the WG in this delivery period • SIMWG organized and held a physical meeting in Portland, Maine, 10–12 June 2015 • SIMWG provided an update on recent applications of stock identification methods to ICES species and on recent advances in stock identification meth- ods. ICES SIMWG REPORT 2015 | 5 • SIMWG developed summary materials of past SIMWG reviews on issues of stock identity for ICES species (1998-2014). This information will be used to build an online reference database. • SIMWG provided expert advice on the following species: 1) Haddock Melanogrammus aeglefinus (as requested by WKHAD) 2) Megrim Lepidorhombus whiffiagonis (as requested by WGBIE) 3) Anchovy Engraulis encrasicolus (as requested by WGHANSA) 4) Greater
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