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Nest-to-surf mortality of loggerhead (Caretta caretta) sea turtle hatchlings on Florida’s east coast in 2016Unknown Date (has links)
Worldwide, sea turtles are especially vulnerable immediately after emerging from
nests. Many monitoring programs measure hatchling production from nest inventories.
These inventories rarely account for mortality occurring post-emergence, leaving an
incomplete estimate of hatchling production. This study addresses the nest-to-surf data gap
for Florida’s east coast nesting assemblages of loggerhead sea turtles (Caretta caretta).
Five locations were surveyed during the 2016 nesting season by using infrared time-lapse
imagery, night vision optics, and track maps. Over all beaches, 7.6% of the observed
hatchlings did not survive to reach the water. Mortality sources varied by location.
Observed predators included: foxes, bobcats, yellow-crowned night herons, ghost crabs,
and gulls. Hatchling disorientation and misorientation occurred more frequently in urban
areas than natural areas. Factors including number of hatchlings emerging, nest-to-surf
distance, and urbanization may help managers estimate nest-to-surf mortality. This study
will improve life history models that serve as foundations of conservation management. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2017. / FAU Electronic Theses and Dissertations Collection
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Fire ants on sea turtle nesting beaches in South Florida, USA, and ST. Croix, USVIUnknown Date (has links)
The red imported fire ant, Solenopsis invicta, is a South American native
introduced in Alabama in the early 20th century. This predatory species has rapidly
spread throughout the southeastern US and parts of the West Indies, inflicting great
ecological and economic damage. For example, Solenopsis invicta is known to attack the
eggs and hatchlings of ground nesting birds and reptiles. The ants swarm into the nests
attacking hatchlings and diminishing their chance for survival. My thesis research aimed
to survey the distribution of ants on sea turtle nesting beaches in South Florida and St.
Croix, USVI, and to evaluate the possible threat of Solenopsis invicta and other predatory
ants to sea turtle hatchlings. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2013.
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