Predation strongly limits demography of a keystone migratory herbivore in a recovering transfrontier ecosystem by Watson, F, Becker, MS, Smit, D, Droge, E, Mukula, T, Martens, S, Mwaba, S, Christianson, D, Creel, S, Brennan, A, M'soka, J, Gaylard, A, Simukonda, C, Nyirenda, M, Mayani, B