• Arterial oxygenation and acid–base status before and during oxygen supplementation in captive European bison (Bison bonasus) immobilized with etorphine-acepromazine-xylazine 

      Gardoni, Nino; Björck, Sven; Morelli, Jacopo; Evans, Alina; Barros, Daniela Sá Braz; Wiklund, Rikard; Græsli, Anne Randi; Thiel, Alexandra; Arnemo, Jon Martin; Lian, Marianne (Peer reviewed; Journal article, 2023)
      Chemical immobilization of captive European bison (Bison bonasus) is often required for veterinary care, transportation, or husbandry practices playing an important role in conservation breeding and reintroduction of the ...
    • Body mass is associated with hibernation length, body temperature, and heart rate in free-ranging brown bears 

      Evans, Alina; Fuchs, Boris; Singh, Navinder; Thiel, Alexandra; Giroud, Sylvain; Blanc, Stephane; Laske, Timothy G.; Frobert, Ole; Friebe, Andrea; Swenson, Jon; Arnemo, Jon Martin (Peer reviewed; Journal article, 2023)
      Background Despite centuries of research, debate remains on the scaling of metabolic rate to mass especially for intraspecific cases. The high variation of body mass within brown bears presents a unique opportunity to ...
    • Body temperature patterns during pregnancy and parturition in moose 

      Græsli, Anne Randi; Thiel, Alexandra; Fuchs, Boris; Stenbacka, Fredrik; Neumann, Wiebke; Singh, Navinder J.; Ericsson, Göran; Arnemo, Jon Martin; Evans, Alina (Peer reviewed; Journal article, 2022)
      Gestation and lactation have high energetic requirements. Up to three-fourths of the gestation period in moose (Alces alces) overlaps with the food-scarce period in winter. During this period, moose deal with the limited ...
    • Classification of behaviors of free-ranging cattle using accelerometry signatures collected by virtual fence collars 

      Versluijs, Erik; Niccolai, Laura Jeanne; Spedener, Mélanie; Zimmermann, Barbara; Hessle, Anna; Tofastrud, Morten; Devineau, Olivier; Evans, Alina (Peer reviewed; Journal article, 2023)
      Precision farming technology, including GPS collars with biologging, has revolutionized remote livestock monitoring in extensive grazing systems. High resolution accelerometry can be used to infer the behavior of an animal. ...
    • Comparison of two non-invasive arterial blood pressure monitoring techniques in brown bears (Ursus arctos) 

      Morelli, Jacopo; Briganti, Angela; Fuchs, Boris; Huber, Ðuro; Evans, Alina; Reljić, Slaven; Arnemo, Jon Martin (Peer reviewed; Journal article, 2020)
      Monitoring arterial blood pressure (BP), represents a more accurate evaluation of hemodynamics than heart rate alone and is essential for preventing and treating intra- and post-operative complications in wildlife chemical ...
    • Concurrent BMP signalling maintenance and TGF-β signalling inhibition is a hallmark of natural resistance to muscle atrophy in the hibernating bear 

      Cussonneau, Laura; Boyer, Christian; Brun, Charlotte; Deval, Christiane; Loizon, Emmanuelle; Meugnier, Emmanuelle; Gueret, Elise; Dubois, Emeric; Taillandier, Daniel; Polge, Cecile; Bechet, Daniel; Gauquelin-Koch, Guillemette; Evans, Alina; Arnemo, Jon Martin; Swenson, Jon; Blanc, Stéphane; Simon, Chantal; Lefai, Etienne; Bertile, Fabrice; Combaret, Lydie (Peer reviewed; Journal article, 2021)
      Abstract: Muscle atrophy arises from a multiplicity of physio-pathological situations and has very detrimental consequences for the whole body. Although knowledge of muscle atrophy mechanisms keeps growing, there is still ...
    • The cost of research: Lasting effects of capture, surgery and muscle biopsy on brown bear (Ursus arctos) movement and physiology 

      Thiel, Alexandra; Hertel, Anne Gabriela; Giroud, Sylvain; Friebe, Andrea; Fuchs, Boris; Kindberg, Jonas; Græsli, Anne Randi; Arnemo, Jon Martin; Evans, Alina (Peer reviewed; Journal article, 2023)
      Animal models are a key component of translational medicine, helping transfer scientific findings into practical applications for human health. A fundamental principle of research ethics involves weighing the benefits of ...
    • Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management 

      Trondrud, Liv Monica; Pigeon, Gabriel; Albon, Steve; Arnold, Walter; Evans, Alina; Irvine, R. Justin; Król, Elżbieta; Ropstad, Erik; Stien, Audun; Veiberg, Vebjørn; Speakman, John R.; Loe, Leif Egil (Peer reviewed; Journal article, 2021)
      Seasonal energetic challenges may constrain an animal's ability to respond to changing individual and environmental conditions. Here, we investigated variation in heart rate, a well-established proxy for metabolic rate, ...
    • Evaluation of Medetomidine-Ketamine for Immobilization of Feral Horses in Romania 

      Roşu, Ovidiu; Melega, Iulia; Evans, Alina; Arnemo, Jon M.; Kûker, Susanne (Peer reviewed; Journal article, 2021)
      Feral horses are immobilized for a variety of reasons including population control via contraceptives. Although opioid combinations have been successfully used for immobilization of feral horses, there is a need for ...
    • Evaluation of three medetomidine-based anesthetic protocols for chemical immobilization of wild boars (Sus scrofa) 

      Morelli, Jacopo; Rossi, Sophie; Fuchs, Boris; Barros, Daniela Sá Braz; Richard, Emmanuelle; Kûker, Susanne; Arnemo, Jon Martin; Evans, Alina (Peer reviewed; Journal article, 2021)
      Three medetomidine-based drug protocols were compared by evaluating time courses, reliability and physiological effects in wild boars. A total of 21 cage-trapped wild boars (Sus scrofa) were immobilized using one of the ...
    • Fat storage influences fasting endurance more than body size in an ungulate 

      Trondrud, Liv Monica; Pigeon, Gabriel; Król, Elżbieta; Albon, Steve; Evans, Alina; Arnold, Walter; Hambly, Catherine; Irvine, R. Justin; Ropstad, Erik; Stien, Audun; Veiberg, Vebjørn; Speakman, John R.; Loe, Leif Egil (Peer reviewed; Journal article, 2021)
      The fasting endurance hypothesis (FEH) predicts strong selection for large body size in mammals living in environments where food supply is interrupted over prolonged periods of time. The Arctic is a highly seasonal and ...
    • Hibernating brown bears are protected against atherogenic dyslipidemia 

      Giroud, Sylvain; Chery, Isabelle; Arrivé, Mathilde; Prost, Michel; Zumsteg, Julie; Heintz, Dimitri; Evans, Alina; Gauquelin-Koch, Guillemette; Arnemo, Jon Martin; Swenson, Jon E.; Lefai, Etienne; Bertile, Fabrice; Simon, Chantal; Blanc, Stéphane (Peer reviewed; Journal article, 2021)
      To investigate mechanisms by which hibernators avoid atherogenic hyperlipidemia during hibernation, we assessed lipoprotein and cholesterol metabolisms of free-ranging Scandinavian brown bears (Ursus arctos). In winter- ...
    • 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 ...
    • 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 ...
    • On the interplay between hypothermia and reproduction in a high arctic ungulate 

      Schmidt, Niels M.; Grøndahl, Carsten; Evans, Alina; Desforges, Jean-Pierre; Blake, John; Hansen, Lars H.; Beumer, Larissa T.; Mosbacher, Jesper B.; Stelvig, Mikkel; Greunz, Eva M.; Chimienti, Marianna; van Beest, Floris M. (Peer reviewed; Journal article, 2020)
      For free-ranging animals living in seasonal environments, hypometabolism (lowered metabolic rate) and hypothermia (lowered body temperature) can be effective physiological strategies to conserve energy when forage resources ...
    • Predicting moose behaviors from tri-axial accelerometer data using a supervised classification algorithm 

      Kirchner, Theresa Margret; Devineau, Olivier; Chimienti, Marianna; Thompson, Daniel P.; Crouse, John; Evans, Alina; Zimmermann, Barbara; Eriksen, Ane (Peer reviewed; Journal article, 2023)
      Background Monitoring the behavior of wild animals in situ can improve our understanding of how their behavior is related to their habitat and affected by disturbances and changes in their environment. Moose (Alces alces) ...
    • Retention and loss of PIT tags and surgically implanted devices in the Eurasian beaver 

      Mayer, Martin; Fuchs, Boris; Robstad, Christian; Evans, Alina; Perrin, Kathryn; Greunz, Eva M.; Laske, Timothy G.; Arnemo, Jon Martin; Rosell, Frank Narve (Peer reviewed; Journal article, 2022)
      Passive integrated transponder devices (PIT tags) are a valuable tool for individual identification of animals. Similarly, the surgical implantation of transmitters and bio-loggers can provide useful data on animal location, ...
    • Seasonality in Biological Rhythms in Scandinavian brown Bears 

      Thiel, Alexandra; Giroud, Sylvain; Hertel, Anne Gabriela; Friebe, Andrea; Devineau, Olivier; Fuchs, Boris; Blanc, Stephane; Støen, Ole-Gunnar; Laske, Timothy G.; Arnemo, Jon Martin; Evans, Alina (Peer reviewed; Journal article, 2022)
      Biological rhythms, such as rhythms in activity and body temperature, are usually highly synchronized and entrained by environmental conditions, such as photoperiod. However, how the expression of these rhythms changes ...
    • Stress responses to repeated captures in a wild ungulate 

      Trondrud, Liv Monica; Ugland, Cassandra Regine; Ropstad, Erik; Loe, Leif Egil; Albon, Steve; Stien, Audun; Evans, Alina; Thorsby, Per Medbøe; Veiberg, Vebjørn; Irvine, R. Justin; Pigeon, Gabriel (Peer reviewed; Journal article, 2022)
      While capture-mark-recapture studies provide essential individual-level data in ecology, repeated captures and handling may impact animal welfare and cause scientific bias. Evaluating the consequences of invasive methodologies ...
    • A Summer Heat Wave Reduced Activity, Heart Rate, and Autumn Body Mass in a Cold-Adapted Ungulate 

      Trondrud, Liv Monica; Pigeon, Gabriel; Król, Elżbieta; Albon, Steve; Ropstad, Erik; Kumpula, Jouko; Evans, Alina; Speakman, John R.; Loe, Leif Egil (Peer reviewed; Journal article, 2023)
      Heat waves are becoming more frequent across the globe and may impose severe thermoregulatory challenges for endotherms. Heat stress can induce both behavioral and physiological responses, which may result in energy deficits ...