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Today’s schedule

Today’s schedule. 1. 0830: Revision-debriefing 2. 0900: Transect technique 3. 0930: Brief/dive - Transects 4. 1200: Lunch 5. 1245-1700: Brief/dive - Transects. Revision. 1. Debrief from yesterday 2. Sizing aids revisited 3. Other considerations: identification.

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Today’s schedule

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  1. Today’s schedule 1. 0830: Revision-debriefing 2. 0900: Transect technique 3. 0930: Brief/dive - Transects 4. 1200: Lunch 5. 1245-1700: Brief/dive - Transects

  2. Revision 1. Debrief from yesterday 2. Sizing aids revisited 3. Other considerations: identification

  3. Aids to sizing fish 1. Slate marks 2. Transect tape marks 3. Hand measurements 4. Bracketing 5. Comparative approach 6. Recalibration during dive

  4. Factors that contribute to under and overestimation of size Overestimation Underestimation 1. Low light 2. Dull body color 3. Poor visibility 4. Objects in foreground 5. Deep-bodied fish 1. Bright light 2. Bright body color 3. Good visibility 4. Objects in background 5. Elongate fish

  5. The progress function 100% Accuracy 0% Time There is hope!

  6. Recap: Visual transect overview

  7. Recap: Visual transect overview Phase 1 Diver 2 - Lays tape - Count midwater fish Diver 1 - Lays tape - Count bottom fish

  8. Recap: Visual transect overview Phase 2 Diver 2 - Lays tape - Count canopy fish Diver 1 - Estimates canopy Entire transect duration: <20min

  9. Visual transects - Part 1 Technique 1. Dimension: 30x2x2m 2. Moving windows 3. Moving in bounds 4. The Stop, Scan, Search approach 5. When to write? 6. On what do I write, when I need to write?

  10. 3m 2. Moving windows

  11. 2. Moving windows Look ahead, but not too far ahead

  12. 3. Moving in bounds

  13. 3. Moving in bounds

  14. 3. Moving in bounds

  15. 3. Moving in bounds Use landmarks to help divide the transect

  16. What about the 10m segments on the data sheet? 1. Origin: Optimism 2. Utility: Data recording tool 3. Real utility: Control device to maintain communication within dive pair 4. At 10m, establish visual contact with other team member

  17. 4. Stop, Scan, Search Mobile, shoaling species

  18. 4. Stop, Scan, Search Sedentary, solitary, cryptic species

  19. 4. Stop, Scan, Search

  20. 4. Stop, Scan, Search Structure your counts, develop routine

  21. 5. When do I write all this stuff down? 1. After scan at beginning of bound 2. At end of bound 3. When you have more than 3 tallies to remember 4. Whenever you need to Golden rule: Never lower your slate!

  22. On what do I write all this stuff down?

  23. Fish sampling datasheet

  24. 6 Aug 2001 Stillwater East Craig Syms 2 6 1005 1040 1 A 20 8 25, 30, 60 SCAR HDEC ELAT DVAC SATR SMYS SMEL OPIC CNIC 9 (14) 25, 35 17 (5) 35, 20 20 (3) 24 15 (4) 8 (26) 30, 35 12, 14, 13 (2) 25 13 18, 32 24 26, 27, 30 (2) 12, 12, 14 10, 9, 9 (3) SFLA 14, 12, 13, 20 22 (4) 35 30, 35, 38 BFRE KGB 9, 10 8, 6, 7 (12) 4, 6, 5, 7 3 (12) 4 (5) 5 (10), 8, 7 4 (6), 5, 7 4 (15) 4 (5), 5 Fish sampling datasheet

  25. Today’s dive program Morning - Dive 1: Everyone:Transect pairs Afternoon - Dive 2: Group 1:Bottom-midwater pairs Group 2:Transect clinic Afternoon - Dive 3: Group 1:Transect clinic Group 2: Bottom-midwater pairs

  26. Today’s dive program MorningTransect pairs - Materials: Slate, 2 fish data sheets, (fish cheat sheet) - Work in pairs (self-assortment) - Dive: Lay out 2 transect lines end to end; Swim back side by side, counting fish; After both transects - compare counts; Re-count transect lines; Repeat/reel up contingent on gas

  27. Today’s dive program AfternoonBottom-midwater pairs - Materials: Slate, 2 fish data sheets, (fish cheat sheet), 1 transect tape each - Work in pairs (self-assortment) - Dive: Designate bottom-midwater counters; Descend, tie-off tapes; Swim bearing (count, maintain visual contact); Change positions; Repeat for tank duration-cutoff time

  28. Today’s dive program AfternoonTransect clinic - Materials: Slate, 2 fish data sheets, (fish cheat sheet), 1 transect tape each - Work in pairs (self-assortment) - Dive: Conduct dive with trainer; Conduct bottom transects as directed; Debrief at boat;

  29. Dive safety brief 1. Dive log - sign out and in 2. Dive procedures - ascent rate 10m/min - deep-shallow - maintain dive team 3. Communications: pay phone (lab), cell phone & VHF Ch 16 (Paragon) 4. First Aid & Oxygen - Shore and Paragon 5.Evacuation plan: Lighthouse - left on Forest - Highway 68 - few miles on Pacific Grove, CHOMP

  30. Questions?

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