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Friends of the Sea accreditation of the Irish albacore tuna trolling fishery

Friends of the Sea accreditation of the Irish albacore tuna trolling fishery. Peter Tyndall. History of Irish albacore tuna fishing. Driftnet fishery commenced in 1990 – 40t Reached a peak of 4858t in 1999 Phased Driftnet ban from 1998 leading to end of drift netting in 2002

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Friends of the Sea accreditation of the Irish albacore tuna trolling fishery

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  1. Friends of the Sea accreditation of the Irish albacore tuna trolling fishery Peter Tyndall

  2. History of Irish albacore tuna fishing • Driftnet fishery commenced in 1990 – 40t • Reached a peak of 4858t in 1999 • Phased Driftnet ban from 1998 leading to end of drift netting in 2002 • EC funded diversification trials – pair pelagic trawling & trolling 1998 and 1999 • Some success but major drop in landings

  3. History of Irish albacore tuna fishing

  4. History of Irish albacore tuna fishing Other fishing methods tested • Longline trials in 1999, 2003, 2004 • Dead baiting trials in 2007 • Deep trolling trials in 2008 • Limited success with all of these methods

  5. History of Irish albacore tuna fishing

  6. History of Irish albacore tuna fishing

  7. History of Irish albacore tuna fishing

  8. Stock Status • ICCAT stock assessment in 2007 • Based on data going back to 1930’s NA Stock is officially over exploited • EC TAC decreased from 34,500 t in 2007 to 30,000 t in 2008 • Irelands quota still ~ 7,000t • Trolling represents a small fraction of Irelands landings which have minimal effect on the stock

  9. Ireland’s contribution to management BIM’s role • Member of ICCAT albacore working group • Collate and submit tuna data to ICCAT • Carry out standardised CPUE and other analyses in support of stock assessment • Tagging studies – dummy archival and pop up satellite tags used • Also collaborate on ageing and stock structure studies

  10. Trolling Method Advantages • Quality • Hook and line caught fish – superior quality • Fish are landed individually – improved handling • Size selective – young fish age 2 – 4 (lower mercury) • Environmentally Friendly • Species selective – only tuna – no dolphins! • No discards • Good fuel efficiency

  11. Trolling Method Advantages of Irish Troll caught tuna • Proximity to the fishing ground • Short trips typically <10 days compared to 20 days by some other fleets • Careful temperature chain management – slush iced before going into the hold • Fishery is accredited under Friends of the Sea

  12. Troll Fish Characteristics - Size Age 3 Age 4 Age 2

  13. Troll Fish Characteristics - Weight

  14. Troll Fish Characteristics - migrations ARRIZABALAGA, H., López Rodas, V., Ortiz de Zárate, V., Costas, E., and González Garcés, A., 2002. Study on the migrations and stock structure of albacore (Thunnus alalunga) from the Atlantic Ocean and the Mediterranean Sea based on conventional tag release-recapture experiences. Col. Vol. Sci. Pap. ICCAT 54(5): 1479-1494.

  15. Trolling Vessels

  16. Trolling Vessels

  17. Trolling Vessels

  18. Trolling Vessels

  19. Trolling Method Hauling Mechanisms • American hydraulic winches • 1 man 5 lines • Hauled individually • Relies on bungee when fish strikes • Spanish hydraulic winches • Operated individually • Can pay out line when fish strikes • More labour intensive

  20. Trolling Method

  21. Trolling Method

  22. Trolling Method

  23. Trolling Method Poles • Constructed of steel, aluminium, eucalyptus wood, fibreglass • Length typically 16 to 19m • Deployed at 30 - 45 degrees • Easy manouverability essential

  24. Trolling Method

  25. Trolling Method

  26. Trolling Method

  27. Trolling Method Lures • Wide variety available • US, SA lures • Spanish man made lures • Rapalas, Cone heads • Double, small to large, barbless & barbed hooks commonly used • Birdies, down planers etc can also be used

  28. Trolling Method

  29. Trolling Method

  30. Onboard handling • Fish are lifted, gaffed or scoop netted aboard depending on size and catch rate • Fish are then • Stunned • Bled • Placed in bleeding tank for a few minutes • Placed in slush ice (3:1 - ice:water, 4 hours) • Tagged with colour coded unique ID tags • Placed in the hold/lockered belly up in single rows

  31. Onboard handling • Tagging of fish permits full traceability back to the boat • Colour codes – simple catch age system • Data are stored by BIM

  32. Onboard handling

  33. Onboard handling

  34. Onboard handling

  35. Onboard handling

  36. Onboard handling

  37. Onboard handling

  38. Onboard handling

  39. Onboard handling

  40. Onboard handling

  41. Friend of the Sea • 3 vessels and therefore the fishery accredited in 2008 • 2 Irish processors/smoke houses also accredited • Improves market options • Assists price stability • Given Expenses of 1500 / day • 8 days fishing 10 day trip • ~ 400 kgs/ day @ €5 minimum requirement.

  42. The End

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