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PGCCDBS Report 2007 ICES PGCCDBS Report 2007 ICES Advisory Committee on Fisheries Management ICES CM 2007/ACFM:09 Report of the Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) 5–9 March 2007 Valetta, Malta 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. 2007. Report of the Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS), 5–9 March 2007, Valetta, Malta. ACFM:09. 115 pp. For permission to reproduce material from this publication, please apply to the General 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. © 2007 International Council for the Exploration of the Sea. ICES PGCCDBS Report 2007 | i Contents Executive summary.......................................................................................................... 4 1 Introduction ............................................................................................................. 7 1.1 Terms of Reference ......................................................................................... 7 1.2 Background...................................................................................................... 7 1.3 General introductory remarks and workplan ................................................... 8 1.4 Cooperation with PGMED (The Mediterranean Planning Group) .................. 8 1.5 Workshops....................................................................................................... 8 1.6 Communication with other expert groups ....................................................... 9 1.6.1 Distribution of PGCCDBS report and reports from Workshops under PGCCDBS................................................................................ 9 1.7 Organization of the report.............................................................................. 10 2 Review and follow up of last year’s recommendations....................................... 10 2.1 Compilation of national manuals and standard operating procedures ........... 10 2.2 Develop a two – step procedure for the flow of information from data – providers to data users. .................................................................................. 10 2.3 Guidelines on how to incorporate experimental design into age reading workshops...................................................................................................... 11 2.4 To develop a procedure for ensuring that AWGs are more actively involved in requesting data and providing feedback to data providers.......... 11 2.5 Improve age readings and maturity staging for several species..................... 11 2.6 Publish reports of age readings and maturity staging workshops online ....... 11 2.7 Each workshop to prepare a digitised set of agreed age otoliths, with and without annotations........................................................................................ 11 2.8 Each workshop to prepare a digitised set of agreed maturity stages, with and without annotations................................................................................. 12 2.9 Considers that the continuing review and assessment of task sharing and cooperation with the discard sampling is best served at RCM level.............. 12 2.10 Supports the development of the project proposal “Discard Atlas” and are of the firm opinion that this would serve as a suitable tool to review discards sampling programmes and develop methodologies to deal with discard rate estimates..................................................................................... 12 2.11 14 Proposals for workshops (other than WKAC&MS) recommended by PGCCDBS 2006............................................................................................ 12 2.12 Review of web tools ...................................................................................... 12 3 Review relevant recommendations from assessment Working Groups, Regional Coordination Meetings, SGRN and STECF Workshops dealing with DCR and where appropriate propose actions to taken within the ICES system ..................................................................................................................... 12 3.1 2006 Age Reading Workshops ...................................................................... 13 3.1.1 Sand eel............................................................................................. 13 3.1.2 Anchovy............................................................................................ 16 3.1.3 Redfishes .......................................................................................... 17 3.1.4 Greenland Halibut............................................................................. 21 3.1.5 Horse Mackerel................................................................................. 21 3.2 2006 Otholits Exchange Programmes............................................................ 25 3.2.1 Flounder............................................................................................ 25 ii | ICES PGCCDBS Report 2007 3.2.2 Saithe ................................................................................................ 25 3.2.3 Sole................................................................................................... 25 3.2.4 Turbot & Brill................................................................................... 28 3.2.5 Grenadier .......................................................................................... 30 3.2.6 Red mullet......................................................................................... 30 3.3 Methodological Workshops........................................................................... 30 3.3.1 [WKMAT] - Workshop on Sexual Maturity Sampling .................... 30 3.3.2 [WKDRP] - Workshop on Discards Raising Procedures.................. 31 3.4 Liaison Meeting............................................................................................. 33 3.5 ICES Assessment Working Groups............................................................... 33 4 Review changes in data collection procedures to check if these present problems for stock assessment data and where appropriate propose procedure changes for rectifying the problems. Such proposals shall be communicated to the DCR system (through DG Fish) for action ..................... 43 4.1 Data issues..................................................................................................... 43 4.1.1 Data availability................................................................................ 43 4.1.2 Data Policy ....................................................................................... 57 4.1.3 Requests to stock co-ordinators ........................................................ 58 4.2 Fisheries-based sampling............................................................................... 58 4.2.1 Problems expected and proposal for exploratory métier-based sampling............................................................................................ 58 4.2.2 Implementation studies in practice ................................................... 59 4.2.3 Discard sampling procedures............................................................ 61 4.2.4 SGRN 06–03 (Anon., 2007) recommendations................................ 61 5 Define the framework for standards and best practises for sampling commercial fisheries. The framework shall include methods to evaluate whether submitted data conforms to the standards. Agree a prioritized workplan for establishing such standards and best practices and initiate intercessional work................................................................................................ 65 5.1 Terminology .................................................................................................. 66 5.2 QA & Indicators ............................................................................................ 67 5.3 Examples ....................................................................................................... 68 5.3.1 Accuracy and precision of fisheries data .......................................... 68 5.3.2 Accuracy and precision of biological stock data .............................. 70 5.4 Further recommended workplan.................................................................... 71 6 Review and update protocols for age calibration and maturity staging workshops............................................................................................................... 71 6.1 TACADAR Concerted Action 2002–2006. Towards Accreditation and Certification of Age Determination of Aquatic Resources............................ 72 6.1.1 TACADAR recommends.................................................................. 72 6.2 Age Calibration Workshops .......................................................................... 73 6.2.1 Time table for exchanges and workshops......................................... 73 6.2.2 Explanation of frequently used terminology..................................... 75 6.2.3 Guidelines for ageing exchanges .....................................................
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