Browsing USN Open Archive by Author "Swenson, Jon"
Now showing items 1-20 of 34
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A "clearcut" case? Brown bear selection of coarse woody debris and carpenter ants on clearcuts
Frank, Shane C.; Steyaert, Sam; Swenson, Jon; Storch, Ilse; Kindberg, Jonas; Barck, Hanna; Zedrosser, Andreas (Journal article; Peer reviewed, 2015-07-05)Forest management alters habitat characteristics, resulting in various effects among and within species. It is crucial to understand how habitat alteration through forest management (e.g. clearcutting) affects animal ... -
A human-induced landscape of fear influences foraging behavior of brown bears
Lodberg-Holm, Hanna Kavli; Gelink, Henriette Wathne; Hertel, Anne Gabriela; Swenson, Jon; Domevscik, Matej; Steyaert, Sam (Journal article; Peer reviewed, 2018)Animals adapt their foraging behavior to variations in food availability and predation risk. In Sweden, brown bears (Ursus arctos) depend on a nearly continuous intake of berries, especially bilberries (Vaccinium myrtillus) ... -
Baiting and feeding mammalian game species: current practices in North America and Europe
Holm, Tor-Egil (Master thesis, 2022)It is commonly stated in the scientific literature that baiting and feeding are widespread wildlife management practices. However, it is difficult to determine exactly how widespread these management practices are, and ... -
Bears and berries: species-specific selective foraging on a patchily distributed food resource in a human-altered landscape
Hertel, Anne Gabriela; Steyaert, Sam; Zedrosser, Andreas; Mysterud, Atle; Lodberg-Holm, Hanna Kavli; Gelink, Henriette Wathne; Kindberg, Jonas; Swenson, Jon (Journal article; Peer reviewed, 2016)When animals are faced with extraordinary energyconsuming events, like hibernation, finding abundant, energy-rich food resources becomes particularly important. The profitability of food resources can vary spatially, ... -
Behavioral correlates of supplementary feeding of wildlife: Can general conclusions be drawn?
Steyaert, Sam; Kindberg, Jonas; Jerina, Klemen; Krofel, Miha; Stergar, Matija; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2014-10-12)Supplementary feeding is a common, but controversial, tool in wildlife management, because it can benefit both humans and wildlife (e.g., increased wildlife densities), but has certain downsides (e.g., increased disease ... -
Berry production drives bottom – up effects on body mass and reproductive success in an omnivore
Hertel, Anne Gabriela; Bischof, Richard; Langval, Ola; Mysterud, Atle; Kindberg, Jonas; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2017)Obligate herbivores dominate studies of the eff ects of climate change on mammals, however there is limited empirical evidence for how changes in the abundance or quality of plant food aff ect mammalian omnivores. Omnivores ... -
Brown bears possess anal sacs and secretions may code for sex
Rosell, Frank; Jojola, Susan M.; Ingdal, Kristian; Lassen, Bård Andreas; Swenson, Jon; Arnemo, Jon Martin; Zedrosser, Andreas (Journal article; Peer reviewed, 2010-09-14)Olfactory communication occurs in carnivores and many scent-mark with anal gland secretions (AGS), which contain a variety of information including sex-related cues. Currently, there is disagreement about whether bear ... -
Can concentrations of steroid hormones in brown bear hair reveal age class?
Cattet, Marc; Stenhouse, Gordon B.; Boulanger, John; Janz, David M.; Kapronczai, Luciene; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2018)Although combining genetic and endocrine data from non-invasively collected hair samples has potential to improve the conservation of threatened mammals, few studies have evaluated this opportunity. In this study, we ... -
Challenges of managing a European brown bear population; lessons from Sweden, 1943–2013
Swenson, Jon; Schneider, Michael; Zedrosser, Andreas; Söderberg, Arne; Franzén, Robert; Kindberg, Jonas (Journal article; Peer reviewed, 2017)Adaptive management’, which has been defined as the repeated iteration between management action, scientific assessment and revised management action, leading to a strengthened foundation for management, is required by ... -
Correcting for enzyme immunoassay changes in long term monitoring studies
Wilson, Abbey E.; Sergiel, Agnieszka; Selva, Nuria; Swenson, Jon; Zedrosser, Andreas; Stenhouse, Gordon; Janz, David M. (Peer reviewed; Journal article, 2021)Enzyme immunoassays (EIAs) are a common tool for measuring steroid hormones in wildlife due to their low cost, commercial availability, and rapid results. Testing technologies improve continuously, sometimes requiring ... -
Determinants of lifetime reproduction in female brown bears: early body mass, longevity, and hunting regulations
Zedrosser, Andreas; Pelletier, Fanie; Bischof, Richard; Festa-Bianchet, Marco; Swenson, Jon (Journal article; Peer reviewed, 2013)In iteroparous mammals, conditions experienced early in life may have long‐lasting effects on lifetime reproductive success. Human‐induced mortality is also an important demographic factor in many populations of large ... -
Do Scandinavian brown bears approach settlements to obtain high-quality food?
Elfström, Marcus; Davey, Marie Louise; Zedrosser, Andreas; Müller, Martin; De Barba, Marta; Støen, Ole-Gunnar; Miquel, Christian; Taberlet, Pierre; Hackländer, Klaus; Swenson, Jon (Journal article; Peer reviewed, 2014)Large carnivores that approach human settlements are usually considered a threat to human property and safety. The prevailing paradigm, that such ‘problem’ animals approach settlements in search of food, ignores their ... -
Does despotic behavior or food search explain the occurrence of problem brown bears in Europe?
Elfström, Marcus; Zedrosser, Andreas; Jerina, Klemen; Støen, Ole-Gunnar; Kindberg, Jonas; Budic, Lara; Jonozovic, Marko; Swenson, Jon (Journal article; Peer reviewed, 2014)Bears foraging near human developments are often presumed to be responding to food shortage, but this explanation ignores social factors, in particular despotism in bears. We analyzed the age distribution and body condition ... -
Ecological implications from spatial patterns in human-caused brown bear mortality
Steyaert, Sam; Zedrosser, Andreas; Elfström, Marcus; Ordiz Fernandez, Andres Avelino; Leclerc, Martin; Frank, Shane C.; Kindberg, Jonas; Støen, Ole-Gunnar; Brunberg, Sven; Swenson, Jon (Journal article; Peer reviewed, 2016)Humans are important agents of wildlife mortality, and understanding such mortality is paramount for effective population management and conservation. However, the spatial mechanisms behind wildlife mortality are often ... -
Faecal spectroscopy: a practical tool to assess diet quality in an opportunistic omnivore
Steyaert, Sam; Hütter, Franziska J.; Elfström, Marcus; Zedrosser, Andreas; Hackländer, Klaus; Le, Minh Hung; Windisch, Wilhelm M.; Swenson, Jon; Isaksson, Tomas (Journal article; Peer reviewed, 2012)Faecal indices of dietary quality can provide useful knowledge about the general ecology of a species, but only if the measurements are accurate and the results are interpreted with caution. In this article, we evaluated ... -
Gut retention time in captive brown bears Ursus arctos
Elfström, Marcus; Støen, Ole-Gunnar; Zedrosser, Andreas; Warrington, Ian; Swenson, Jon (Journal article; Peer reviewed, 2013)Knowing animals’ gut retention time (GRT) for important food items is critical when using non-invasive studies based on faecal remains, e.g. when analysing nutritive quality of food, or relating diet or behaviour to ... -
Harvest is associated with the disruption of social and finescale genetic structure among matrilines of a solitary large carnivore
Frank, Shane C.; Pelletier, Fanie; Kopatz, Alexander; Bourret, Audrey; Garant, Dany; Swenson, Jon; Eiken, Hans Geir; Hagen, Snorre; Zedrosser, Andreas (Peer reviewed; Journal article, 2020)Harvest can disrupt wildlife populations by removing adults with naturally high survival. This can reshape sociospatial structure, genetic composition, fitness, and potentially affect evolution. Genetic tools can detect ... -
Heritability of head size in a hunted large carnivore, the brown bear (Ursus arctos)
Rivrud, Inger Maren; Frank, Shane C.; Bischof, Richard; Mysterud, Atle; Steyaert, Sam; Hertel, Anne Gabriela; Hagen, Snorre; Eiken, Hans Geir; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2019)Wild animal populations experience selection pressures from both natural and anthropogenic sources. The availability of extensive pedigrees is increasing along with our ability to quantify the heritability and evolvability ... -
Hibernation ecology of brown bears in Sweden
Friebe, Andrea; Swenson, Jon; Zedrosser, Andreas (Chapter, 2023)Hibernation is an adaptive strategy to cope with unfavourable environmental conditions. Bears are the only large mammal that use this strategy during winter. They reduce their body temperature by several degrees and their ... -
Hunting promotes sexual conflict in brown bears
Gosselin, Jacinthe; Leclerc, Martin; Zedrosser, Andreas; Steyaert, Sam; Swenson, Jon; Pelletier, Fanie (Journal article; Peer reviewed, 2017)The removal of individuals through hunting can destabilize social structure, potentially affecting population dynamics. Although previous studies have shown that hunting can indirectly reduce juvenile survival through ...