Effects of Leaf Size on Forage Selection by Collared Pikas, Ochotona Collaris

References Cited

• Aebischer, N. J. , P. A. Robertson , and R. E. Kenward . 1993. Compositional analysis of habitat use from animal radio-tracking data. Ecology 74:1313–1325.
   Web of Science ®Google Scholar
• Broadbooks, H. E. 1965. Ecology and distribution of pikas of Washington and Alaska. American Midland Naturalist 73:299–335.
   Web of Science ®Google Scholar
• Calenge, C. 2006. The package “adehabitat” for the R software: a tool for the analysis of space and habitat use by animals. Ecological Modeling 197:516–519. , Version 1.5.
   Web of Science ®Google Scholar
• Cody, W. J. 2000. Flora of the Yukon Territory. Second edition Ottawa, Canada NRC Research Press.
   Google Scholar
• Conner, D. A. 1983. Seasonal changes in activity patterns and the adaptive value of haying in pikas ( Ochotona princeps ). Canadian Journal of Zoology 61:411–416.
   Google Scholar
• Dearing, M. D. 1996. Disparate determinants of summer and winter diet selection of a generalist herbivore, Ochotona princeps . Oecologia 108:467–478.
   Google Scholar
• Dearing, M. D. 1997a. The function of haypiles of pikas ( Ochotona princeps ). Journal of Mammalogy 78:1156–1163.
   Web of Science ®Google Scholar
• Dearing, M. D. 1997b. The manipulation of plant toxins by a food-hoarding herbivore, Ochotona princeps . Ecology 78:774–781.
   Web of Science ®Google Scholar
• Franken, R. 2002. Demography and metapopulation dynamics of collared pikas ( Ochotona collaris ) in the southwest Yukon. MSc thesis. Department of Biological Sciences, University of Alberta, Edmonton, Alberta. 133 pp.
   Google Scholar
• Gliwicz, J. , S. Pagacz , and J. Witczuk . 2006. Strategy of food plant selection in the Siberian northern pika, Ochotona hyperborea . Arctic, Antarctic, and Alpine Research 38:54–59.
   Web of Science ®Google Scholar
• Huntly, N. J. , A. T. Smith , and B. L. Ivins . 1986. Foraging behavior of the pika ( Ochotona princeps ), with comparisons of grazing versus haying. Journal of Mammalogy 67:139–148.
   Web of Science ®Google Scholar
• Johnson, D. H. 1980. The comparison of usage and availability measurements for evaluating resource preference. Ecology 61:65–71.
   Web of Science ®Google Scholar
• Koh, S. and D. S. Hik . 2007. Herbivory mediates grass-endophyte relationships. Ecology 88:2752–2757.
   Google Scholar
• Krebs, C. J. 1999. Ecological methodology. Second edition Menlo Park Addison Wesley Longman Inc.
   Google Scholar
• Manly, B. F. J. , L. L. MacDonald , D. L. Thomas , T. L. McDonald , and W. P. Erickson . 2002. Resource selection by animals: statistical design and analysis for field studies Secaucus Kluwer Academic Publishers.
   Google Scholar
• McIntire, E. J. B. and D. S. Hik . 2005. Influences of chronic and current season grazing by collared pikas on above-ground biomass and species richness in subarctic alpine meadows. Oecologia 145:288–297.
   PubMed Web of Science ®Google Scholar
• McKechnie, A. M. , A. T. Smith , and M. M. Peacock . 1994. Kleptoparasitism in pikas ( Ochotona princeps ): theft of hay. Journal of Mammalogy 75:488–491.
   Google Scholar
• Millar, J. S. and F. C. Zwickel . 1972. Characteristics and ecological significance of hay piles in pikas. Mammalia 36:657–667.
   Google Scholar
• Morrison, S. 2007. Foraging behaviour and population dynamics of collared pikas, Ochotona collaris . PhD thesis. Department of Biological Sciences, University of Alberta, Edmonton, Alberta. 156 pp.
   Google Scholar
• Morrison, S. F. and D. S. Hik . 2008. Discrimination of intra- and inter-specific forage quality by collared pikas ( Ochotona collaris ). Canadian Journal of Zoology 86:456–461.
   Web of Science ®Google Scholar
• Morrison, S. , L. Barton , P. Caputa , and D. S. Hik . 2004. Forage selection by collared pikas, Ochotona collaris , under varying degrees of predation risk. Canadian Journal of Zoology 82:533–540.
   Web of Science ®Google Scholar
• R Development Core Team 2005. R Version 2.1.1: a language and environment for statistical computing Vienna R Foundation for Statistical Computing.
   Google Scholar
• Robbins, C. T. 1983. Wildlife feeding and nutrition.. New York: Academic Press .
   Google Scholar
• Smith, A. T. 1974. The distribution and dispersal of pikas: influences of behavior and climate. Ecology 55:1368–1376.
   Web of Science ®Google Scholar
• Smith, A. T. and B. L. Ivins . 1986. Terminal intrusions by pikas ( Ochotona princeps ) as a function of occupant activity. Animal Behaviour 34:392–397.
   Google Scholar
• Smith, A. T. , N. A. Formozov , R. S. Hoffmann , Z. Changlin , and M. A. Erbajeva . 1990. The pikas. In Chapman, J. A. and J. E. C. Flux , editors. Rabbits, hares and pikas: status survey and conservation action plan Oxford International Union for Conservation of Nature and Natural Resources. 14–60.
   Google Scholar
• Stephens, D. W. and J. R. Krebs . 1986. Foraging theory Princeton Princeton University Press.
   Google Scholar
• Thomas, D. L. and E. J. Taylor . 1990. Study designs and tests for comparing resource use and availability. Journal of Wildlife Management 54:322–330.
   Web of Science ®Google Scholar