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8 Report of the ICES Advisory Committee Agenda Item 4.4 For Information Council CNL(09)8 Report of the ICES Advisory Committee EXTRACT OF THE REPORT OF THE ICES ADVISORY COMMITTEE NORTH ATLANTIC SALMON STOCKS AS REPORTED TO THE NORTH ATLANTIC SALMON CONSERVATION ORGANIZATION 2009 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. 2009. Extract of the Report of the Advisory Committee. North Atlantic Salmon Stocks, as reported to the North Atlantic Salmon Conservation Organization. 118 pp. For permission to reproduce material from this publication, please apply to the Gen‐ eral Secretary. © 2009 International Council for the Exploration of the Sea ICES WGNAS Report 2009 Extract i Contents Contents ................................................................................................................................... i Executive Summary ............................................................................................................... 1 1 Introduction .................................................................................................................... 2 1.1 Main tasks .............................................................................................................. 2 1.2 Management framework for salmon in the North Atlantic ............................ 5 1.3 Management objectives ........................................................................................ 5 1.4 Reference points and application of precaution ............................................... 6 2 Atlantic salmon in the North Atlantic area ............................................................... 7 2.1 Catches of North Atlantic salmon ...................................................................... 7 2.1.1 Nominal catches of salmon ..................................................................... 7 2.1.2 Catch and release ..................................................................................... 8 2.1.3 Unreported catches .................................................................................. 8 2.2 Farming and sea ranching of Atlantic salmon .................................................. 9 2.3 Development of forecast models ........................................................................ 9 2.3.1 NAC model ............................................................................................. 10 2.3.2 NEAC models ......................................................................................... 13 2.3.3 Preliminary results of the Bayesian framework models for NAC and NEAC ..................................................................................... 16 2.3.4 Further work ........................................................................................... 18 2.4 NASCO has asked ICES to report on significant, new or emerging threats to, or opportunities for, salmon conservation and management ........................................................................................................ 18 2.4.1 Genetic population structure and potential for local adaptation in Atlantic salmon .............................................................. 18 2.4.2 Investigations of Atlantic salmon feeding ecology at West Greenland................................................................................................ 19 2.4.3 Red vent syndrome ................................................................................ 19 2.4.4 Reduced sensibility and development of resistance towards treatment in salmon louse (Lepeophtheirus salmonis) ......................... 19 2.4.5 Atlantic salmon stock assessment using sonar .................................. 20 2.4.6 Smolt migration on the River Rhine .................................................... 20 2.4.7 Reintroduction of salmon into the River Rhine ................................. 20 2.4.8 European regulations ............................................................................ 20 2.5 NASCO has asked ICES to continue work already initiated to investigate associations between changes in biological characteristics of all life stages of Atlantic salmon, environmental changes and variations in marine survival with a view to identifying predictors of abundance ................................................................ 21 2.6 NASCO has asked ICES to evaluate the results of studies that estimate the level of prespawning mortality of salmon caught and released by anglers and the implications for stock assessments .................. 24 ii 2.7 NASCO has asked ICES to provide a compilation of tag releases by country in 2008 and advise on progress with compiling historical tag recovery data from oceanic areas ............................................................... 25 2.7.1 Compilation of tag releases and fin clip data by ICES Member Countries in 2008 .................................................................... 25 2.7.2 Summary of the Workshop on Salmon Historical Information‐New Investigations from old tagging data (WKSHINI) ............................................................................................. 25 3 North East Atlantic Commission .............................................................................. 48 3.1 Status of stocks/exploitation .............................................................................. 48 3.2 Management objectives ...................................................................................... 49 3.3 Reference points .................................................................................................. 49 3.3.1 National conservation limits ................................................................ 49 3.3.2 Progress with setting river‐specific conservation limits ................... 50 3.4 Management advice ........................................................................................... 51 3.5 Relevant factors to be considered in management ......................................... 52 3.6 Pre‐fishery abundance forecasts ....................................................................... 53 3.6.1 Pre‐Fishery Abundance forecasts for the Southern NEAC stock complex using the existing regression model .......................... 53 3.6.2 New forecast models ............................................................................. 53 3.6.3 Results of the NEAC Bayesian forecast models ................................. 54 3.6.4 Comparison with the regression forecast model ............................... 54 3.6.5 Use of the NEAC Bayesian forecast models in catch advice ............ 55 3.7 Comparison with previous assessment ........................................................... 56 3.7.1 National PFA model and national conservation limit model .......... 56 3.7.2 PFA regression forecast model ............................................................ 56 3.8 NASCO has requested ICES to describe the key events of the 2008 fisheries and the status of the stocks ................................................................ 56 3.8.1 Fishing at Faroes in 2007/2008 .............................................................. 56 3.8.2 Significant events in NEAC homewater fisheries in 2008 ................ 56 3.8.3 Gear and effort ....................................................................................... 56 3.8.4 Catches .................................................................................................... 57 3.8.5 Catch per unit effort (cpue) .................................................................. 57 3.8.6 Age composition of catches .................................................................. 57 3.8.7 Farmed and ranched salmon in catches .............................................. 57 3.8.8 National origin of catches ..................................................................... 58 3.8.9 Trends in the PFA for NEAC stocks .................................................... 58 3.8.10 Survival indices for NEAC stocks ....................................................... 59 3.9 NASCO has requested ICES to provide any new information on the extent to which the objectives of any significant management measures introduced in recent years have been achieved ............................ 59 3.10 NASCO has requested ICES to further investigate opportunities to develop a framework of indicators that could be used to identify any significant change in previously provided multi‐annual management advice ............................................................................................ 59 ICES WGNAS Report 2009 Extract iii 4 North American Commission .................................................................................... 72 4.1 Status of stocks/exploitation .............................................................................. 72 4.2 Management objectives ...................................................................................... 72 4.3 Reference points .................................................................................................. 72 4.4 Management advice ........................................................................................... 72 4.5 Relevant factors to be considered in management ......................................... 72 4.6 Updated forecast
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