Nathaniel D. Rayl, Todd K. Fuller, John F. Organ, John E. McDonald, Jr., Shane P. Mahoney, Colleen Soulliere, Steve E. Gullage, Tyler Hodder, Frank Norman, Truman Porter, Guillaume Bastille-Rousseau, James A. Schaefer, and Dennis L. Murray
Rangifer tarandus population in insular Newfoundland, Canada, has been severely limited by predation on newborn calves. These neonates are patchily distributed on the landscape; therefore, to adequately understand predator–prey interactions, the temporal and geographic extent of the distribution of caribou calves must be identified so that current areas with calves can be differentiated from areas without calves.
Edward H. Miller, Shane P. Mahoney, Michael L. Kennedy, and Phyllis K. Kennedy
The authors investigated molar-crown–size variation, sexual dimorphism, and allometry in the black bear (Ursus americanus), using hunter-shot specimens (n =429) from the island of Newfoundland, and museum specimens from elsewhere in Canada and the continental United States (n =502). The authors predicted higher variation in and weaker correlations among molar size in this omnivorous species than in other species of Carnivora with dentition more specialized for carnivory, because of relatively weak normalizing selection on food-processing mechanisms in U. americanus.
