ICES WGFTFB REPORT 2010 SCICOM STEERING GROUP ON ECOSYSTEM SURVEYS SCIENCE AND TECHNOLOGY ICES CM 2010/SSGESST:14 REF. SCICOM, ACOM Report of the ICES-FAO Working Group on Fishing Technology and Fish Behaviour (WGFTFB) 31 May - 4 June 2010 ICES Headquarters, Copenhagen 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. 2010. Report of the ICES-FAO Working Group on Fishing Technology and Fish Behaviour (WGFTFB), 31 May - 4 June 2010, ICES Headquarters, Copenhagen. ICES CM 2010/SSGESST :14. 252 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. © 2010 International Council for the Exploration of the Sea ICES WGFTFB REPORT 2010 | i Contents Executive summary ................................................................................................................ 1 1 Directive .......................................................................................................................... 6 2 Introduction .................................................................................................................... 6 3 Terms of Reference ........................................................................................................ 6 4 Participants ..................................................................................................................... 8 5 Explanatory note on meeting and report structure .................................................. 8 6 WGFTFB advice and requests during 2009–2010 ..................................................... 8 6.1 Overview................................................................................................................ 8 6.1.1 Request on Baltic cod selectivity ............................................................ 8 6.1.2 References ............................................................................................... 20 6.1.3 Response to The Netherlands’ request on Electric Pulse Trawl ........................................................................................................ 21 6.1.4 References ............................................................................................... 25 6.1.5 Response to WGNEACS on Exploratory Fishing Protocols ............ 25 6.1.6 References ............................................................................................... 30 6.1.7 Response to NAFO on Redfish Selectivity ......................................... 31 7 Report from FAO ......................................................................................................... 32 8 Report from SGTCOD ................................................................................................ 34 9 Report from SGEM ...................................................................................................... 35 10 Report from WGQAF .................................................................................................. 37 11 Report from WKPULSE .............................................................................................. 38 12 Update on gillnet selectivity manual and WKGILLMAN ................................... 39 13 ToR a): Incorporation of Fishing Technology Issues/Expertise into Management Advice ................................................................................................... 39 13.1 General Overview ............................................................................................... 39 13.2 Terms of Reference ............................................................................................. 40 13.3 General issues ...................................................................................................... 40 13.4 Information for individual assessment working groups............................... 51 13.5 Conclusions ......................................................................................................... 51 14 ToR b): Seine net fisheries ......................................................................................... 51 14.1 General Overview ............................................................................................... 51 14.2 Terms of Reference ............................................................................................. 52 14.3 List of Participants .............................................................................................. 52 14.4 General issues ...................................................................................................... 53 ii | ICES WGFTFB REPORT 2010 14.4.1 Identification of seine net fisheries ...................................................... 53 14.4.2 Fly-dragging (Scottish seining) ............................................................ 55 14.4.3 Anchor Seining (Danish Seining)......................................................... 56 14.4.4 Pair Seine ................................................................................................. 56 14.4.5 Other Seine Net Methods ...................................................................... 57 14.5 Assessment of Seine Net Fisheries ................................................................... 58 14.5.1 Fuel Efficiency ........................................................................................ 59 14.5.2 Environmental Impact........................................................................... 61 14.5.3 Fish Quality ............................................................................................ 62 14.5.4 Selectivity ................................................................................................ 63 14.5.5 Discarding ............................................................................................... 72 14.6 Use of flume tanks for seine nets observations ............................................... 73 14.7 Technology Creep ............................................................................................... 73 14.7.1 Net Design .............................................................................................. 73 14.7.2 Seine Rope ............................................................................................... 75 14.7.3 Deck Machinery.................................................................................... 75 14.8 Gear Monitoring Equipment ............................................................................. 76 14.9 Pair seining and Tow-Dragging........................................................................ 76 14.10 Dual Purpose Vessels ......................................................................................... 77 14.11 Conclusions ......................................................................................................... 77 14.12 Recommendations .............................................................................................. 78 14.13 References ............................................................................................................ 78 15 ToR c): Gear Monitoring Systems ............................................................................ 83 15.1 General overview ................................................................................................ 83 15.2 Terms of Reference ............................................................................................. 83 15.3 List of Participants .............................................................................................. 83 15.4 Overview.............................................................................................................. 83 15.4.1 Description of developments in sensor capabilities .......................... 84 15.5 Experience and challenges using net mensuration systems ......................... 85 15.6 Integrated, custom sensor data collection systems ........................................ 86 15.7 Calibration and sensitivity ................................................................................ 87 15.8 Areas for further development ......................................................................... 87 15.9 Discussion and conclusions ............................................................................... 88 15.10 Recommendations .............................................................................................. 88 16 ToR d): Innovation in Fishing Gear Technology ................................................... 89 16.1 General overview ................................................................................................ 89 16.2 Terms of Reference ............................................................................................. 89 16.3 List of Participants .............................................................................................. 89 16.4 General Issues ..................................................................................................... 90 16.5 Individual Countries .........................................................................................