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Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

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Page 1: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National

Wildlife Refuge

Page 2: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Refuge Boundary502 km2

Our Study Site In KWNWR

Page 3: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Observational StudiesAnswer questions like:

• Are hawksbills present in the refuge?

• How many are there?

• Where in the refuge do they occur?

• What kinds of habitats are they using?

Page 4: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Hawksbill sighting locations in the Northeastern KWNWR

OPUE = 0.19 observations per transect kilometer

Page 5: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Hawksbill sighting locations in the central KWNWR

OPUE = 0.02 observations per transect kilometer

Page 6: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Hawksbill sighting locations in the western KWNWR

OPUE = 0.06 observations per transect kilometer

Page 7: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Capture StudiesAnswer questions like:

• What is the size class distribution?

• What is the growth rate?

• Where are these turtles coming from?

• Where are these turtles going?

Page 8: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge
Page 9: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Size class distribution of hawksbill turtles in the KWNWR (N=82)

Juveniles = 20-50cm SCL Subadults = 50-70cm SCL Adults = 70+cm SCL

Page 10: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Hawksbill growth rates in KWNWR

Mean juvenile growth rate = 9.24cm/yr (N-11) Mean subadult growth rate = 3.66cm/yr (n=4)

Page 11: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

Natal Beach Origin of KWNWR Hawksbills (N=50)

Page 12: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

ACKNOWLEDGEMENTSACKNOWLEDGEMENTS

And to our volunteers, who make it all happen: Shigetomo Hirama, Meghan Koperski, Dawn Witherington, Chris Koeppel, Karrie Minch,Wanda Bresette, Karen Holloway-Adkins, Boyd Lyon and many more

And to our volunteers, who make it all happen: Shigetomo Hirama, Meghan Koperski, Dawn Witherington, Chris Koeppel, Karrie Minch,Wanda Bresette, Karen Holloway-Adkins, Boyd Lyon and many more

Special thanks to Tom Wilmers and Anne Morkill (USFWS) and the KWNWR for their unrelenting

support of our work in the Refuge

Special thanks to Tom Wilmers and Anne Morkill (USFWS) and the KWNWR for their unrelenting

support of our work in the Refuge

Thanks to the Garrison Bight City Marina in Key WestThanks to the Garrison Bight City Marina in Key West

Page 13: Population Structure and Genetic Origin of Hawksbill Turtles in the Key West National Wildlife Refuge

www.inwater.orgwww.inwater.org


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