issues with dispersal dates
From Julie: there’s some issues with the dispersal dates. it looks like used DLS instead of disappear, so anyone who dispersed (fate = d) after 3/30/13 looks like they dispersed prematurely early because their DLS is before 3/30/13.
note: 3/30/13 is the end of the data we have currently, so end of the sessions we are using for this run. DLS = date last seen