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Life History Strategies in Extreme Environments: Comparative Demography of Arctic and Alpine PtarmiganDownload
Abstract: Arctic and alpine habitats are extreme environments characterized by short breeding seasons, cold temperatures, limited food availability, and potentially high predation rates. Stringent ecological conditions are likely to have important consequences for the evolution of life history...
Nest Survival Patterns in Willow Ptarmigan: Influence of Time, Nesting Stage, and Female CharacteristicsDownload
Nest predation is the most important factor limiting reproductive success of Willow Ptarmigan (Lagopus lagopus), as it is for many bird species. Using program MARK, we examined patterns of daily nest survival in two widely separated populations of Willow Ptarmigan in Manitoba and British...