Sökning: "Buteo lagopus"

Hittade 3 avhandlingar innehållade orden Buteo lagopus.

1. 1. Predator responses to non-stationary rodent cycles

   Författare :Peter Hellström; Anders Angerbjörn; Xavier Lambin; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Buteo lagopus; Vulpes lagopus; Lemmus; Myodes; population cycles; predation; numerical response; functional response; arctic; lemmings; voles; fox; monitoring; raptors; zoologisk ekologi; Animal Ecology;

   Sammanfattning : Regular fluctuations in population size, cycles, are common in small mammals and have important effects on predator populations and life histories. In this thesis, I identify long-term patterns and processes in two specialist predators, the arctic fox Vulpes lagopus and the rough-legged buzzard Buteo lagopus, in relation to their prey (lemmings and voles) and in the case of the arctic fox also to a dominant competitor, the red fox Vulpes vulpes. LÄS MER

3. 2. Interactions between rodents and rough-legged buzzards (Buteo Lagopus) in Northern Sweden

   Författare :Peter Hellström; Stockholms universitet; []
   Nyckelord :;

   Sammanfattning : .... LÄS MER

4. 3. Predator-prey interactions of raptors in an arctic environment

   Författare :Jesper Nyström; Anders Angerbjörn; A. Rolf Ims; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology of raptors; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

   Sammanfattning : This thesis concerns the predator-prey interactions of three raptor species in a Swedish arctic community: the gyrfalcon (Falco rusticolus), the rough-legged buzzard (Buteo lagopus) and the golden eagle (Aquila chrysaetos). The gyrfalcon behaved like a highly specialised ptarmigan (Lagopus spp.) predator. LÄS MER