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Tagging Methods for Stock Assessment and Research in Fisheries

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Tagging Methods for Stock Assessment and Research in Fisheries 1 TAGGING METHODS FOR STOCK ASSESSMENT AND RESEARCH IN FISHERIES Report of Concerted Action FAIR CT.96.1394 (CATAG) Co-ordinator Mr. Vilhjalmur Thorsteinsson, Marine Research Institute, Skulagata 4, IS-121 Reykjavik, Iceland Editorial committee Dr. Geoff Arnold, Centre for Environment, Fisheries & Aquaculture Science (CEFAS), Lowestoft, UK Prof. John Davenport, University Marine, Biological Station, Millport, UK Dr. Niall Ó Maoiléidigh, Marine Institute, Dublin, IRELAND Mr. Vilhjálmur Thorsteinsson, Marine Research Institute, Reykjavik, ICELAND Reykjavík 2002 2 Management Committee of the CATAG project Dr. Geoff Arnold (Chair), Centre for Environment, Fisheries & Aquaculture Science (CEFAS), Lowestoft, UK Prof. John Davenport, Department of Zoology & Animal Ecology, University College, Cork, IRELAND Dr. Olav Rune Godø, Institute of Marine Research, Bergen, NORWAY Mr. Curt Insulander, Swedish Salmon Research Institute, Älvkarleby, SWEDEN. Dr. Niall Ó Maoiléidigh, Marine Institute, Dublin, IRELAND Mr. Vilhjalmur Thorsteinsson, Marine Research Institute, Reykjavik, ICELAND Workgroups responsible for various chapters Chapter 4, conventional tagging: Mr Curt Insulander (group leader), Mr Stig Petersen, Dr Josianne Støttrup and Mr Vilhjalmur Thorsteinsson. Chapter 5, electronic tagging, telemetry and data-logging tags: Dr Geoff Arnold (group leader), Mr Sigmar Gudbjornsson, Mrs Marianne Holm, Dr Tor Heggberget, Dr Niall Ó Maoiléidigh and Mr Johannes Sturlaugsson. Chapters 6 and 7, national legislation affecting tagging programmes; fish health and welfare, behavioural and physiological effects of tagging procedures: . Prof. John Davenport (group leader), Dr Etienne Baras, Dr Gianna Fabi and Dr Gisli Jonsson. Chapter 8, data analysis and modelling: Dr Olav Rune Godø (group leader), Dr-Ing. Frederico Borghini, Mr Tapani Pakarinen and Dr George Tserpes For addresses see chapter 11 (Annex): names and addresses of partners in the CATAG project. In citations please refer to: Thorsteinsson, V. 2002. Tagging Methods for Stock Assessment and Research in Fisheries. Report of Concerted Action FAIR CT.96.1394 (CATAG). Reykjavik. Marine Research Institute Technical Report (79), pp 179. 3 CONTENTS Page Foreword.......................................................................................................... 5 1. Introduction ..................................................................................................... 7 2. Rationale and Objectives................................................................................. 8 3. General concerns ............................................................................................. 9 3.1 Strategic planning of tagging programmes................................................ 9 3.2 Treatment of fish during capture, tagging and release ............................. 10 3.3 Quality and consistency of recapture information ................................... 12 3.4 References.............................................................................................. 13 4. Identification tags and marks........................................................................ 13 4.1 Introduction............................................................................................ 13 4.2 Tag and mark types ................................................................................ 13 4.3 Application of methods........................................................................... 13 4.4 General applicability............................................................................... 20 4.5 Shellfish tagging..................................................................................... 21 4.6 Requirements and recommendations....................................................... 23 4.7 References.............................................................................................. 24 5. Electronic tags................................................................................................ 26 5.1 Introduction............................................................................................ 26 5.2 Tag and sensor classification .................................................................. 26 5.3 Capture, handling and fish recovery........................................................ 33 5.4 Tag attachment methods ......................................................................... 42 5.5 Recovery of data storage tags (DSTs) ..................................................... 53 5.6 Application to fisheries........................................................................... 57 5.7 Future applications and developments..................................................... 67 5.8 Recommendations .................................................................................. 80 5.9 References............................…..................................................................82 6. Legislation...................................................................................................... 98 6.1 Introduction............................................................................................ 98 6.2 Fish tagging and the law governing vivisection....................................... 98 6.3 Requirements and recommendations..................................................... 105 6.4 References............................................................................................ 106 7. Fish welfare and health in relation to tagging ............................................ 108 7.1 Introduction.......................................................................................... 108 7.2 Anaesthesia .......................................................................................... 108 7.3 Effects of conventional tags on fish ...................................................... 111 7.4 Effects of electronic tags on fish ........................................................... 113 7.5 Conclusions.......................................................................................... 125 7.6 Effects of tags on organisms other than fish.......................................... 126 7.7 Requirements and recommendations..................................................... 127 7.8 References............................................................................................ 127 7.9 Appendix I - Summary of main results.................................................. 134 7.10 Appendix II - Downloadable information sheets ................................... 143 8. Data analysis and modelling........................................................................ 150 8.1 Introduction.......................................................................................... 150 4 8.2 Current methodology............................................................................ 151 8.3 Requirements and recommendation ...................................................... 165 8.4 References............................................................................................ 168 9. Future........................................................................................................... 172 9.1 Perspectives.......................................................................................... 172 9.2 Recommendations/Requirements.......................................................... 172 10. The CATAG website.................................................................................... 175 10.1 Website functions ................................................................................. 175 10.2 Website structure.................................................................................. 176 11. Annex 1: Names and addresses of partners to the CATAG project .......... 178 5 Foreword The overall objective of FAIR CT.96.1394 (1997-99) was to achieve improvements in the methodology of fish tagging techniques with emphasis on applications in fisheries research and stock assessment. The report consists of ten chapters. The first three are essentially introductory, sketching the background and concerns that led to the Concerted Action, and describing its rationale and objectives. Chapters 4 to 8 address the various objectives of the project, whilst Chapters 9 to 11 provide a conclusion and additional information. Chapters 4 to 8 are based on the deliberations of four separate working groups, which tackled different aspects of the subject and then presented their conclusions for debate in a plenary session. Chapter 4 is devoted to conventional identification tags and tagging techniques. The content is comprehensive, but not exhaustive, because this area has been reviewed before. Responsible for this chapter were: Mr. Curt Insulander, (SRI, Sweden), Dr Josianne Støttrup (DIFR, Hirtshals), Mr Stig S. Pedersen (DIFR, Silkeborg) and Mr. Vilhjalmur Thorsteinsson (MRI, Reykjavik). Chapter 5 is concerned with electronic tags and provides the most up-to-date compilation of the field, covering tag function, engineering and methodology in some detail. This chapter provides the technical core of the report. Participants in the workgroup were: Dr Geoff Arnold (CEFAS, Lowestoft), Dr Tor G. Heggberget (NINA, Trondheim), Mrs Marianne Holm (IMR, Bergen), Dr Niall Ó Maoiléidigh (FRC, Dublin), Mr Johannes Sturlaugsson (IFF, Reykjavik) and Mr Sigmar Gudbjornsson (Star Oddi Ehf, Reykjavik). Chapters 6 and 7 are devoted to the legislation governing tag use, and
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