Grizzly bear predation links the loss of native trout to the demography of migratory elk in Yellowstone - Middleton, Arthur D.; Morrison, Thomas; Fortin, Jennifer K.; Robbins, Charles; Proffitt, Kelly; White, P.J.; McWhirter, Douglas; Koel, Todd M.; Brimeyer, Douglas; Fairbanks, W.; Kauffman, Matthew J. (Proceedings of the Royal Society B: Biological Sciences, 2013)