1 / 31

STFA/CFMC Pilot Trap Vent Study Final Report (3/25/2009)

STFA/CFMC Pilot Trap Vent Study Final Report (3/25/2009). Acknowledgements. Project Funding CFMC Puerto Rico Sea Grant SEFSC Fishermen Tony Blanchard Winston Ledee Julian Magras Ernest Quetel Sampling Gerald Greaux Ruth Gomez. Trap Vents Tested. Location of Vents. Completed Trips.

vevay
Download Presentation

STFA/CFMC Pilot Trap Vent Study Final Report (3/25/2009)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. STFA/CFMC Pilot Trap Vent StudyFinal Report(3/25/2009)

  2. Acknowledgements • Project Funding • CFMC • Puerto Rico Sea Grant • SEFSC • Fishermen • Tony Blanchard • Winston Ledee • Julian Magras • Ernest Quetel • Sampling • Gerald Greaux • Ruth Gomez

  3. Trap Vents Tested

  4. Location of Vents

  5. Completed Trips

  6. Completed Trap Hauls

  7. Total Fish (all traps)

  8. Effect of Set Length

  9. CPUE (Fish/Trap Haul)

  10. Total Catch/Bycatch

  11. % Bycatch

  12. Total Fish in Landings

  13. CPUE Landings(Fish/Trap Haul)

  14. CPUE Bycatch(Fish/Trap Haul)

  15. Reasons for Discard

  16. Empty Empty Traps 12% 15% 32% 13% 12%

  17. Average TL (mm)

  18. Species Totals(20 Most Abundant)

  19. Species Abundance

  20. Average Lengths

  21. Blue Tang (FL mm) N=153 N=137 N=21 N=196

  22. Longspined Squirrelfish (FL mm) N=65 N=136 N=166 N=9

  23. Queen Triggerfish (FL mm) N=133 N=84 N=80 N=56 Missing Bycatch

  24. Red Hind (TL mm) N=153 N=137 N=196 N=12 Missing Bycatch

  25. White Grunt (FL mm) N=50 N=109 N=9 N=85

  26. Scrawled Cowfish (TL mm) N=69 N=29 N=42 N=41

  27. Preliminary Findings • Study design works well. • Escape vents release fish but also release target fish (2 x 4). • Other vents do not differ from controls. • Need to test other vents in order to find a successful design. • Release Panels function on long sets

  28. Vent Design Considerations • Location. Location was held constant for the pilot study but could be significant. • Visual cues. All of the vents in the present study were created by removing portions of the mesh. There are no collars around the vents and some of the fishermen feel that the current one inch wide vents might work if there was a visual cue. • Size. There is a general consensus that the 1 by 6 vent, or some modification of that vent size might be likely to improve escapement of by catch and the likely starting design will be some version of the 1 by 6 vent size. • Orientation. Escapement may be enhanced by either horizontal or vertical orientation of the vents.

  29. STFA CRP Proposal • Goal: Design vents that will release target species and still retain landings • 18 Month study period • 8 Fishermen: to rotate among interested participants • Phase 1 Vents to be developed from pilot study findings • Phase 2 Vents to be developed from Phase 1 findings • Implement within STFA (46% of STT Trips) as soon as developed (i.e. Don’t have to wait for FMP amendment or compatible regulations

More Related