Now showing items 21-40 of 41

    • High concentrations of lead (Pb) in blood and milk of free-ranging brown bears (Ursus arctos) in Scandinavia 

      Fuchs, Boris; Thiel, Alexandra; Zedrosser, Andreas; Brown, Ludovick; Hydeskov, Helle Bernstorf; Rodushkin, Ilia; Evans, Alina; Boesen, Amanda Høyer; Græsli, Anne Randi; Kindberg, Jonas; Arnemo, Jon Martin (Peer reviewed; Journal article, 2021)
      Exposure to lead (Pb) is a global health problem for both humans and wildlife. Despite a dramatic decline in human Pb exposure following restrictions of leaded gasoline and industry and thereby an overall reduction of Pb ...
    • 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 ...
    • Hunting promotes spatial reorganization and sexually selected infanticide 

      Leclerc, Martin; Frank, Shane C.; Zedrosser, Andreas; Swenson, Jon; Pelletier, Fanie (Journal article; Peer reviewed, 2017)
      Harvest can affect the ecology and evolution of wild species. The removal of key individuals, such as matriarchs or dominant males, can disrupt social structure and exacerbate the impact of hunting on population growth. ...
    • Hunting regulation favors slow life histories in a large carnivore 

      Van de Walle, Joanie; Pigeon, Gabriel; Zedrosser, Andreas; Swenson, Jon; Pelletier, Fanie (Journal article; Peer reviewed, 2018)
      As an important extrinsic source of mortality, harvest should select for fast reproduction and accelerated life histories. However, if vulnerability to harvest depends upon female reproductive status, patterns of selectivity ...
    • Infanticide as a male reproductive strategy has a nutritive risk effect in brown bears 

      Steyaert, Sam; Reusch, Christine; Brunberg, Sven; Swenson, Jon; Hackländer, Klaus; Zedrosser, Andreas (Journal article; Peer reviewed, 2013-10-02)
      Behavioural strategies to reduce predation risk can incur costs, which are often referred to as risk effects. A common strategy to avoid predation is spatio-temporal avoidance of predators, in which prey typically trade ...
    • Insights in the regulation of trimetylamine N-oxide production using a comparative biomimetic approach suggest a metabolic switch in hibernating bears 

      Ebert, Thomas; Painer, Johanna; Bergman, Peter; Qureshi, Abdul Rashid; Giroud, Sylvain; Stalder, Gabrielle; Kublickiene, Karolina; Göritz, Frank; Vetter, Sebastian G.; Bieber, Claudia; Fröbert, Ole; Arnemo, Jon Martin; Zedrosser, Andreas; Redtenbacher, Irene; Shiels, Paul; Johnson, Richard J.; Stenvinkel, Peter (Peer reviewed; Journal article, 2020)
      Experimental studies suggest involvement of trimethylamine N-oxide (TMAO) in the aetiology of cardiometabolic diseases and chronic kidney disease (CKD), in part via metabolism of ingested food. Using a comparative biomimetic ...
    • Litter loss triggers estrus in a nonsocial seasonal breeder 

      Steyaert, Sam; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2014)
      Sexually selected infanticide (SSI) is often presumed to be rare among seasonal breeders, because it would require a near immediate return to estrus after the loss of an entire litter during the mating season. We evaluated ...
    • Metabolic reprogramming involving glycolysis in the hibernating brown bear skeletal muscle 

      Chazarin, Blandine; Storey, Kenneth B.; Ziemianin, Anna; Chanon, Stéphanie; Plumel, M.; Chery, Isabelle; Durand, Christine; Evans, Alina; Arnemo, Jon Martin; Zedrosser, Andreas; Swenson, Jon; Gauquelin-Koch, Guillemette; Simon, Chantal; Blanche, Stephane; Lefai, Etienne; Bertile, Fabrice (Journal article; Peer reviewed, 2019)
      Background In mammals, the hibernating state is characterized by biochemical adjustments, which include metabolic rate depression and a shift in the primary fuel oxidized from carbohydrates to lipids. A number of studies ...
    • National Parks in Northern Sweden as Refuges for Illegal Killing of Large Carnivores 

      Rauset, Geir Rune; Andrén, Henrik; Swenson, Jon; Samelius, Gustaf; Segerström, Peter; Zedrosser, Andreas; Persson, Jens (Journal article; Peer reviewed, 2016)
      Large protected areas are often considered to be as important as population size in reducing extinction risk for large carnivores. However, the effectiveness of protected areas for large carnivore survival has rarely been ...
    • Phylogeography, genetic diversity, and connectivity of brown bear populations in Central Asia 

      Tumendemberel, Odbayar; Zedrosser, Andreas; Proctor, Michael F.; Reynolds, Harry V.; Adams, Jennifer R.; Sullivan, Jack M.; Jacobs, Sarah J.; Khorloojav, Tumennasan; Tserenbataa, Tuya; Batmunkh, Mijiddorj; Swenson, Jon; Waits, Lisette P. (Peer reviewed; Journal article, 2019)
      Knowledge of genetic diversity and population structure is critical for conservation and management planning at the population level within a species’ range. Many brown bear populations in Central Asia are small and ...
    • Proteolysis inhibition by hibernating bear serum leads to increased protein content in human muscle cells 

      Chanon, Stéphanie; Chazarin, Blandine; Toubhans, Benoit; Durand, Christine; Chery, Isabelle; Robert, Maud; Vieille-Marchiset, Aurélie; Swenson, Jon; Zedrosser, Andreas; Evans, Alina; Brunberg, Sven; Arnemo, Jon Martin; Gauquelin-Koch, Guillemette; Storey, Kenneth B.; Simon, Chantal; Blanc, Stéphane; Bertile, Fabrice; Lefai, Etienne (Journal article; Peer reviewed, 2018)
      Muscle atrophy is one of the main characteristics of human ageing and physical inactivity, with resulting adverse health outcomes. To date, there are still no efficient therapeutic strategies for its prevention and/or ...
    • Quantifying long-term stress in brown bears with the hair cortisol concentration: a biomarker that may be confounded by rapid changes in response to capture and handling 

      Cattet, Marc; Macbeth, Bryan J.; Janz, David M.; Zedrosser, Andreas; Swenson, Jon; Dumond, Mathieu; Stenhouse, Gordon B. (Journal article; Peer reviewed, 2014)
      The measurement of cortisol in hair is becoming important in studying the role of stress in the life history, health and ecology of wild mammals. The hair cortisol concentration (HCC) is generally believed to be a reliable ...
    • Scent-sniffing dogs can discriminate between native Eurasian and invasive North American beavers 

      Rosell, Frank; Cross, Hannah; Johnsen, Christin Beate; Sundell, Janne; Zedrosser, Andreas (Peer reviewed; Journal article, 2019)
      The invasion of a species can cause population reduction or extinction of a similar native species due to replacement competition. There is a potential risk that the native Eurasian beaver (Castor fiber) may eventually be ...
    • Seasonal and annual variation in the diet of brown bears Ursus arctos in the boreal forest of southcentral Sweden 

      Stenset, Nina Emilie; Lutnæs, Paul Antoni Nilsen; Bjarnadóttir, Valgerður; Dahle, Bjørn Steinar; Fossum, Kristin Høivik; Jigsved, Patrick; Johansen, Thomas; Neumann, Wiebke; Opseth, Ole; Rønning, Oddmund; Steyaert, Sam; Zedrosser, Andreas; Brunberg, Sven; Swenson, Jon (Journal article; Peer reviewed, 2016)
      Understanding a species' feeding ecology is essential for successful management and conservation, because food abundance can influence body mass, survival, reproductive success, movements, and habitat use. We describe ...
    • Sex discrimination via anal gland secretion in a territorial monogamous mammal 

      Cross, Hannah; Zedrosser, Andreas; Nevin, Owen; Rosell, Frank (Journal article; Peer reviewed, 2014-07-12)
      Monogamy in mammals is relatively unusual, only occurring in 3-5% and to an even lesser degree in rodents. Monogamy exists in two forms, facultative which evolved due to female dispersion and obligate when male care is ...
    • Social environment shapes female settlement decisions in a solitary carnivore 

      Hansen, Jennifer Eve; Hertel, Anne Gabriela; Frank, Shane C.; Kindberg, Jonas; Zedrosser, Andreas (Peer reviewed; Journal article, 2021)
      How and where a female selects an area to settle and breed is of central importance in dispersal and population ecology as it governs range expansion and gene flow. Social structure and organization have been shown to ...
    • Socio-ecological features other than sex affect habitat selection in the socially obligate monogamous Eurasian beaver 

      Steyaert, Sam; Zedrosser, Andreas; Rosell, Frank (Journal article; Peer reviewed, 2015-08-11)
      Habitat selection is a context-dependent mechanism, in which both the internal state as well as external factors affect the behavior and decisions of an individual. This is well known for polygamous mammals, which are ...
    • Sociodemographic factors modulate the spatial response of brown bears to vacancies created by hunting 

      Frank, Shane C.; Leclerc, Martin; Pelletier, Fanie; Rosell, Frank; Swenson, Jon; Bischof, Richard; Kindberg, Jonas; Eiken, Hans Geir; Hagen, Snorre; Zedrosser, Andreas (Journal article; Peer reviewed, 2017)
      1. There is a growing recognition of the importance of indirect effects from hunting on wildlife populations, e.g. social and behavioural changes due to harvest, which occur after the initial offtake. Nonetheless, little ...
    • Temporal effects of hunting on foraging behavior of an apex predator: Do bears forego foraging when risk is high? 

      Hertel, Anne Gabriela; Zedrosser, Andreas; Mysterud, Atle; Støen, Ole-Gunnar; Steyaert, Sam; Swenson, Jon (Journal article; Peer reviewed, 2016)
      Avoiding predators most often entails a food cost. For the Scandinavian brown bear (Ursus arctos), the hunting season coincides with the period of hyperphagia. Hunting mortality risk is not uniformly distributed throughout ...
    • The relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears 

      Gosselin, Jacinthe; Zedrosser, Andreas; Swenson, Jon; Pelletier, Fanie (Journal article; Peer reviewed, 2014)
      There is increasing evidence of indirect effects of hunting on populations. In species with sexually selected infanticide (SSI), hunting may decrease juvenile survival by increasing male turnover. We aimed to evaluate the ...