5 Works

Data from: No place like home? A test of the natal habitat-biased dispersal hypothesis in Scandinavian wolves

Ana Sanz Pérez, Andres Ordiz, Håkan Sand, Jon Swenson, Petter Wabakken, Camilla Wikenros, Barbara Zimmermann, Mikael Åkesson & Cyril Milleret
Natal dispersal is an important mechanism for the viability of populations. The influence of local conditions or experience gained in the natal habitat could improve fitness if dispersing individuals settle in an area with similar habitat characteristics. This process, defined as “natal habitat-biased dispersal” (NHBD), has been used to explain distribution patterns in large carnivores, but actual studies evaluating it are rare. We tested whether gray wolf Canis lupus territory establishment was influenced by the...

Data from: Activity patterns at the Arctic Circle: nocturnal eagle owls and interspecific interactions during continuous midsummer daylight

Ane Eriksen & Petter Wabakken
Circadian rhythms result from adaptations to biotic and abiotic environmental conditions that cycle through the day, such as light, temperature, or temporal overlap between interacting species. At high latitudes, close to or beyond the polar circles, uninterrupted midsummer daylight may pose a challenge to the circadian rhythms of otherwise nocturnal species, such as eagle owls Bubo bubo. By non‐invasive field methods, we studied eagle owl activity in light of their interactions with their main prey...

Data from: Den site selection by male brown bears at the population’s expansion front

Ane Eriksen, Petter Wabakken, Erling Maartmann & Barbara Zimmermann
Brown bears (Ursus arctos) spend about half of the year in winter dens. In order to preserve energy, bears may select denning locations that minimize temperature loss and human disturbance. In expanding animal populations, demographic structure and individual behavior at the expansion front can differ from core areas. We conducted a non-invasive study of male brown bear den sites at the male-biased, low-density western expansion front of the Scandinavian brown bear population, comparing den locations...

Data from: Habitat segregation between brown bears and gray wolves in a human-dominated landscape

Cyril Milleret, Andrés Ordiz, Guillaume Chapron, Harry Peter Andreassen, Jonas Kindberg, Johan Månsson, Aimee Tallian, Petter Wabakken, Camilla Wikenros, Barbara Zimmermann, Jon E. Swenson & Håkan Sand
Identifying how sympatric species belonging to the same guild coexist is a major question of community ecology and conservation. Habitat segregation between two species might help reduce the effects of interspecific competition and apex predators are of special interest in this context, because their interactions can have consequences for lower trophic levels. However, habitat segregation between sympatric large carnivores has seldom been studied. Based on monitoring of 53 brown bears (Ursus arctos) and 7 sympatric...

Data from: Heart rate during hyperphagia differs between two bear species

Boris Fuchs, Koji Yamazaki, Alina L. Evans, Toshio Tsubota, Shinsuke Koike, Tomoko Naganuma & Jon M. Arnemo
Hyperphagia is a critical part of the yearly cycle of bears when they gain fat reserves before entering hibernation. We used heart rate as a proxy to compare the metabolic rate between the Asian black bear (Ursus thibetanus) in Japan and the Eurasian brown bear (Ursus arctos) in Sweden from summer in to hibernation. In the hyperphagic period, black bears feed on fat- and carbohydrate-rich hard masts whereas brown bears feed on sugar-rich berries. Availability...

Registration Year

  • 2018

Resource Types

  • Dataset


  • Inland Norway University of Applied Sciences
  • Swedish University of Agricultural Sciences
  • Norwegian University of Life Sciences
  • Utah State University
  • Hokkaido University
  • Norwegian Institute for Nature Research
  • Tokyo University of Agriculture