Darcy Bradley filed her dissertation and is now DOCTOR Bradley. Congratulations.  Darcy's work in Palmyra Atoll showed that populations of reef sharks may not be as large as previously thought, as common methods such as visual surveys tend to overestimate these large mobile predators.  Using the largest tag and recapture program to date, Darcy showed spatial patterns of hotspots and coldspots for these reef sharks.   For a complete look at Darcy's work, check out this video:  https://www.youtube.com/watch?v=DGEaFVuixqs