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A Preliminary Assessment of Hawksbill Turtles In Palm Beach County - - PowerPoint PPT Presentation
A Preliminary Assessment of Hawksbill Turtles In Palm Beach County - - PowerPoint PPT Presentation
A Preliminary Assessment of Hawksbill Turtles In Palm Beach County Waters Larry Wood, Marinelife Center of Juno Beach, Florida Project objectives Characterize Palm Beach Countys hawksbill population structure Investigate the relationships
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Area of Focus
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shark canyon, a.k.a. n.w. double ledges nun’s ledge mid-reef yellowtail
02 0405 07 10 11 12 16 26 27 28 30 31 33 42 43 44 45
Larry’s ledge Jolly Jeff’s
47
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governor’s walk north double ledges turtle mound 6-7 windows, “south breakers” Ron’s rock teardrop
01 03 08 13 15 17 19 21 22 23 24 25 29 32 36 37 38 39 41
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Size class of captures (n=54)
2 4 6 8 10 12 14 16 18 20 0-10 11-20 21-30 31-40 41-50 51-60 61-70 71-80 81-90 straight carapace length (cm) # of captures
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Depth at capture (n=54)
5 10 15 20 25 0-5 6-10 11-15 16-20 21-25 depth (m) # captures
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Photographic Identification
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Epibiont patterning
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Cranial scute pigmentation
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Results so far… 54 turtles captured in 51 days diving 24 confirmed re-sightings representing 13 turtles Longest records: 220, 250, 680* days All seen in close proximity to capture site Efficacy of hand-capture proven 21% have Milliporina (Hydrozoa) colonies on carapace
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The next year…
Tissue samples to be analyzed for stock assessment Blood collection for gender determination Begin to characterize reef habitats with digital videography Expand study area
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Many Thanks!
- Dr. Anne Meylan, Amy