- Stochastic predation events and population persistence in bighorn sheepMarco Festa-Bianchet
Université de Sherbrooke Département de biologie Sherbrooke, Quebec J1K 2R1, Canada
Proc Biol Sci 273:1537-43. 2006..We suggest that such processes may be common. In such cases, predator-prey equilibria may only occur at large geographical and temporal scales, and are unlikely with increasing habitat fragmentation...
- Temperature constraints on foraging behaviour of male Alpine ibex (Capra ibex) in summerJean François Aublet
Departement de Biologie, Universite de Sherbrooke, 2500 boul de l Universite, Sherbrooke, QC, J1K2R1, Canada
Oecologia 159:237-47. 2009..Larger males may be more sensitive to temperature and solar radiation, or may have more flexibility in allocating time to different activities, given their lower relative energetic requirements...
- Using reproductive value to estimate key parameters in density-independent age-structured populationsSteinar Engen
Department of Mathematical Sciences, Norwegian University of Science and Technology, N 7491 Trondheim, Norway
J Theor Biol 244:308-17. 2007..We illustrate the method by estimating the long-run growth rate and the environmental variance in an exponentially growing population of Bighorn Sheep...
- Selection on heritable seasonal phenotypic plasticity of body massFanie Pelletier
Division of Biology and Natural Environment Research Council Center for Population Biology, Faculty of Life Sciences, Imperial College London, Silwood Park, Ascot, Berkshire, SL5 7PY, United Kingdom
Evolution 61:1969-79. 2007....
- The status of the world's land and marine mammals: diversity, threat, and knowledgeJan Schipper
International Union for Conservation of Nature IUCN Species Programme, IUCN, 28 Rue Mauverney, 1196 Gland, Switzerland
Science 322:225-30. 2008..Marine mammals are also disproportionately poorly known. These data are made freely available to support further scientific developments and conservation action...
- Quantitative genetics and sex-specific selection on sexually dimorphic traits in bighorn sheepJocelyn Poissant
Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2E9
Proc Biol Sci 275:623-8. 2008..The absence of detectable sexually antagonistic selection suggests that currently there are no sexual conflicts at loci influencing horn volume and body mass...
- Sex- and age-specific survival of the highly dimorphic Alpine ibex: evidence for a conservative life-history tacticCarole Toïgo
Office National de la Chasse et de la Faune Sauvage, 5 allée de Bethléem, Z I Mayencin, 38610 Gieres, France
J Anim Ecol 76:679-86. 2007..Male ibex differ from similar-sized herbivores by showing a nearly indeterminate growth in horn size and body mass. By surviving to an advanced age, males may enjoy high reproductive success because of their large size...
- Early onset of vegetation growth vs. rapid green-up: impacts on juvenile mountain ungulatesNathalie Pettorelli
Département de biologie and Centre d études nordiques, Universite Laval, Quebec G1K 7P4, Canada
Ecology 88:381-90. 2007....
- Selection and genetic (co)variance in bighorn sheepDavid W Coltman
Department of Biological Sciences, University of Alberta, Edmonton, Alberta, T6G 2E9, Canada
Evolution 59:1372-82. 2005..Trade-offs in the form of negative genetic or phenotypic correlations among the traits we have measured do not appear to constrain the potential for evolution in this population...
- Undesirable evolutionary consequences of trophy huntingDavid W Coltman
Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
Nature 426:655-8. 2003..Declines in mean breeding values for weight and horn size therefore occurred in response to unrestricted trophy hunting, resulting in the production of smaller-horned, lighter rams, and fewer trophies...