Using Maternal DNA to Evaluate Egg Translocation Success of the Loggerhead Sea Turtle (Caretta Caretta) at Chincoteague National Wildlife Refuge
Summary
The federally threatened Caretta caretta nests on Assateague Island, Virginia. From 1969 to 1979, eggs from nests laid on Cape Romain NWR, SC were translocated to Chincoteague NWR. The main goal was to extend the U.S. Atlantic loggerhead breeding range to protected beaches physically and ecologically similar. Females that were part of the transplant project may now be returning to their hatch and release sites.The current management aims to protect current nesting sea turtles andare participating with the University of Southern Georgia on a genetics study to gather more information on nesting females. With this said, are we seeing the effects of the management effort from the 70’s now?, what is the hatching success of nests? and, is the current management aiding the hatch success of nests?. The areas of study were Chincoteague NWR, NASA Wallops Island- Virginia and Assateague Island National Park, Maryland. We collected an egg (24 hours of deposition) and GPS points from each nest found to compare location and nesting frequency of the individuals. Maternal nuclear microsatellite DNA was isolated from the eggshells of loggerheads. Genotypes derived from these eggshells allow an individual assignment of nests and demographic parameter estimates for loggerhead nesting populations. Management activities have kept mortality below so far. However, if turtle nesting increases on the Refuge there may be more overlap between human disturbance factors and turtle nesting. The program has been successful as far as nesting attempt frequency although nesting success has not been statistically significant.

Awards under this project:
ASLO Multicultural Program Travel Award, Hampton University & National Science Foundation 2014Alumni Conference Mentor Travel Award, ESA SEEDS program 2015