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A brief summary of Precautionary Approach work by SCRS [and some personal reflections]

A brief summary of Precautionary Approach work by SCRS [and some personal reflections]. V.R. Restrepo Halifax, 3/2008. International Background. UNCED (Rio, 1992) FAO Code of Conduct (1995) UNFSA (1995) RFMOs (NAFO, ICES ICCAT, mid-1990s). SCRS Background.

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A brief summary of Precautionary Approach work by SCRS [and some personal reflections]

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  1. A brief summary ofPrecautionary Approach work by SCRS[and some personal reflections] V.R. Restrepo Halifax, 3/2008

  2. International Background • UNCED (Rio, 1992) • FAO Code of Conduct (1995) • UNFSA (1995) • RFMOs (NAFO, ICES ICCAT, mid-1990s)

  3. SCRS Background • ICCAT Tuna Symposium (Azores, June 10-18, 1996) • SCRS (Madrid, October 20-24, 1997) • ICCAT Ad Hoc WG on the Precautionary Approach (Miami, May 13-14, 1998) • ICCAT Ad Hoc WG on the Precautionary Approach (Dublin, May 17-21, 1999) • FAO Expert Consultation (Thailand, March 2000)

  4. Steps • Azores Symposium 1996 • How does PA apply to tuna? • SCRS 1997 • Create ad hoc PA Working Group • Ad Hoc WG Meeting 1 (Miami 1998) • Develop TofR • Questionnaire for all Species Group Chairs

  5. TofR

  6. Questionnaire

  7. Questionnaire

  8. Questionnaire

  9. Steps • Ad Hoc WG Meeting 2 (Dublin 1999) • Main meeting to fulfill TofR • Summarize PA in other for a • Summarize questionnaires on stocks • Technical (gear) considerations • Env. Biological considerations • Data collection considerations • BRPs • Targets, limits, control rules: SIMULATION • Role of Scientists vs Role of Managers

  10. BRPs • Target = Fmsy (ICCAT convention) • Limit = Fmsy (UNFSA App 2) • Conflict?

  11. BRPs • Target = Fmsy (ICCAT convention) • Limit = Fmsy (UNFSA App 2) • Conflict? Maybe Yes, maybe No “In fact, there are very few examples where fishing mortality has been limited to FMSY over a significant period of time, even where MSY has been the stated management objective, and the Committee was not aware of any examples where stocks have collapsed despite fishing mortality being maintained near FMSY over a substantial period.”

  12. BRPs • Control Rules • Test performance with management strategy simulations

  13. Roles

  14. Steps • Commission 1999 (Rio) • Bring scientists and managers together at future meeting • Keep doing simulation work • Bring in environmental and social issues • Ad hoc WG should meet again in 2000

  15. Steps • FAO Expert Consultation (Phuket, 2000) RESEARCH IMPLICATIONS OF ADOPTING THE PRECAUTIONARY APPROACH TO MANAGEMENT OF TUNA FISHERIES • Implications for data collection and research; relationship between uncertainty, risk, targets, limits • Commission (Marrakech, 2000) • Good idea to do simulation work • Consider scientist-manager get together at next Comm meeting Allocation ; BFT

  16. Steps • Commission (2001 Murcia, Spain) • SCRS Chair: we await instructions • Meeting did not end (subsequently, PA proposals by Canada) (here we are) Allocation ; BFT

  17. A few personal thoughts on targets and limitsand bluefin • Fmsy is a target (ICCAT Convention); Is it also a limit (UNFSA)?

  18. Fmsy a constant or a control rule?

  19. Constant catch control rules

  20. Constant Catch and Fmsy

  21. BFT rebuilding with constant catch

  22. BFT overfishing with constant catch

  23. Precision

  24. 2100 t

  25. Summary • Our assessments are not precise enough to tell a good wave from a rip tide • A constant catch rebuilding strategy is more effective when it involves a large initial reduction in yield • On the other hand, constant catch management is attractive in terms of stability. Can we advise on a compromise approach?

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