Blar i forfatter "Acquarone, Mario"

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    • The Bacterial Microbiome in the Small Intestine of Hooded Seals (Cystophora cristata) 

      Acquarone, Mario; Salgado-Flores, Alejandro; Sundset, Monica Alterskjær (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-27)
      Arctic hooded seals (Cystophora cristata) are monogastric carnivores that go through extreme fasting and re-feeding in early life. They are born isolated on sea ice; suckle high-fat milk for four days and may then fast for up to one month before they start hunting and feeding on small prey (fish and crustaceans). Previous studies of the gut microbiota in pinnipeds have focused on the large intestine, ...

    • Carbon, Nitrogen and Sulphur isotopic fractionation in captive juvenile hooded seal (Cystophora cristata): application for diet analysis 

      Pinzone, Marianna; Acquarone, Mario; Huyghebaert, Loreen; Sturaro, Nicolas; Michel, Loïc N.; Siebert, Ursula; Das, Krishna (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-15)
      <p><i>Rationale</i>: Intrinsic biogeochemical markers, such as stable isotope ratios of carbon, nitrogen and sulphur, are increasingly used to trace the trophic ecology of marine top predators. However, insufficient knowledge of fractionation processes in tissues continues to hamper the use of these markers.</p> <p><i>Methods</i>: We performed a controlled feeding experiment with eight juvenile ...

    • Characterization of the gut microbiome of hooded seals (Cystophora cristata) 

      Acquarone, Mario; Salgado, Alejandro Flores; Sundset, Monica Alterskjær (Conference object; Konferansebidrag, 2016-03-14)

    • Energy efficiency of respiration in mature and newborn reindeer 

      Solberg, Simon Birger Byremo; Kjelstrup, Signe; Magnanelli, Elisa; Kizilova, Nataliya; Barroso, Iratxe Lorea Casado; Acquarone, Mario; Folkow, Lars (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-25)
      Reindeer (<i>Rangifer tarandus</i>) have evolved elaborate nasal turbinate structures that are perfused via a complex vascular network. These are subject to thermoregulatory control, shifting between heat conservation and dissipation, according to the animal’s needs. The three-dimensional design of the turbinate structures is essential in the sense that they determine the efficiency with which heat ...

    • Evaluation of etorphine reversed by diprenorphine for the immobilisation of free-ranging Atlantic walrus (Odobenus rosmarus rosmarus L.) 

      Acquarone, Mario; Born, Erik W.; Griffiths, David; Knutsen, Lars Øyvind; Wiig, Øystein; Gjertz, Ian (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)

    • A life after Research? First Release of Harp Seals (Phoca groenlandica) after Temporary Captivity for Scientific Purposes 

      Blanchet, Marie-Anne; Acquarone, Mario; Biuw, Martin; Larsen, Roger B.; Nordøy, Erling Sverre; Folkow, Lars (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-07-08)
      Three wild-caught female harp seals (Pagophilus groenlandicus) from the Greenland Sea stock were brought into temporary captivity in connection with a controlled validation study on energetics. The two pups and one adult were kept in two indoor and outdoor experimental facilities approved by the Norwegian Animal Research Authority. They were trained daily using operant conditioning to participate ...

    • Marine mammal hotspots across the circumpolar Arctic 

      Hamilton, Charmain D.; Lydersen, Christian; Aars, Jon; Acquarone, Mario; Atwood, Todd; Baylis, Alastair; Biuw, Martin; Boltunov, Andrei N.; Born, Erik W.; Boveng, Peter; Brown, Tanya M.; Cameron, Michael; Citta, John; Crawford, Justin; Dietz, Rune; Elias, Jim; Ferguson, Steven H.; Fisk, Aaron; Folkow, Lars; Frost, Kathryn J.; Glazov, Dmitri M.; Granquist, Sandra M.; Gryba, Rowenna; Harwood, Lois; Haug, Tore; Heide-Jørgensen, Mads Peter; Hussey, Nigel E.; Kalinek, Jimmy; Laidre, Kristin L.; Litovka, Dennis I.; London, Josh M.; Loseto, Lisa L.; MacPhee, Shannon; Marcoux, Marianne; Matthews, Cory J. D.; Nilssen, Kjell Tormod; Nordøy, Erling Sverre; O’Corry-Crowe, Greg; Øien, Nils Inge; Olsen, Morten Tange; Quakenbush, Lori; Rosing-Asvid, Aqqalu; Semenova, Varvara; Shelden, Kim E. W.; Shpak, Olga V.; Stenson, Garry; Storrie, Luke; Sveegaard, Signe; Teilmann, Jonas; Ugarte, Fernando; Von Duyke, Andrew L.; Watt, Cortney; Wiig, Øystein; Wilson, Ryan R.; Yurkowski, David J.; Kovacs, Kit M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-11)
      Aim: Identify hotspots and areas of high species richness for Arctic marine mammals.<p><p> Location: Circumpolar Arctic. <p>Methods: A total of 2115 biologging devices were deployed on marine mammals from 13 species in the Arctic from 2005 to 2019. Getis-Ord Gi* hotspots were calculated based on the number of individuals in grid cells for each species and for phyloge-netic groups (nine pinnipeds, ...

    • The Nasal Geometry of the Reindeer Gives Energy-Efficient Respiration 

      Magnanelli, Elisa; Wilhelmsen, Øivind; Acquarone, Mario; Folkow, Lars; Kjelstrup, Signe (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-07-14)
      Reindeer in the arctic region live under very harsh conditions and may face temperatures below 233 K. Therefore, efficient conservation of body heat and water is important for their survival. Alongside their insulating fur, the reindeer nasal mechanism for heat and mass exchange during respiration plays a fundamental role. We present a dynamic model to describe the heat and mass transport that takes ...

    • Prolonged chemical restraint of walrus (Odobenus rosmarus) with etorphine supplemented with medetomidine 

      Griffiths, David; Born, Erik W.; Acquarone, Mario (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      Physiological studies involving the use of isotopic water required chemical restraint of free- ranging walruses (Odobenus rosmarus) for several hours. In August 2000, six male walrus (total body mass: 1050–1550 kg) were immobilized in East Greenland by remote delivery of 8.0–9.8 mg of etorphine and subsequently restrained for up to 6.75 h by administration of medetomidine. The effects of etorphine ...

    • Reply to ‘Swim encounters with Killer Whales (Orcinus orca) off Northern Norway: interactive behaviours directed towards Human Divers and Snorkellers obtained from opportunistic underwater video recordings' 

      Bertella, Giovanna; Acquarone, Mario (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-29)
      This is a reply to the research note ‘Swim Encounters with Killer Whales (Orcinus orca) off Northern Norway: Interactive Behaviours directed towards Human Divers and Snorkellers obtained from Opportunistic Underwater Video Recordings’ by C. Pagel, M. Scheer and M. Lück published on the Journal of Ecotourism in the December 2016 issue. This research note gives us the opportunity to reflect on the ...

    • Report of the Workshop on Age Estimation in Monodontids 

      Hohn, Aleta A.; Lockyer, Christina; Acquarone, Mario (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
      The workshop was a 2-day event organised immediately before the Society for Marine Mammalogy biennial conference in Tampa. NAMMCO funding enabled participation of 4 invited experts and also supported the organization and logistics associated with the workshop. The breadth and depth of the workshop presentations made it clear that most issues concerning monodontid age estimation are not unique. Many ...

    • Seroprevalence for Brucella spp. in Baltic ringed seals (Phoca hispida) and East Greenland harp (Pagophilus groenlandicus) and hooded (Cystophora cristata) seals 

      Sonne, Christian; Andersen-Ranberg, Emilie; Rajala, Elisabeth; Agerholm, Jørgen S.; Bonefeld-Jørgensen, Eva; Desforges, Jean-Pierre; Eulaers, Igor; Jenssen, Bjørn Munro; Koch, Anders; Rosings-Asvid, Aqqualu; Siebert, Ursula; Tryland, Morten; Mulvad, Gert; Härkönen, Tero; Acquarone, Mario; Nordøy, Erling Sverre; Dietz, Rune; Magnusson, Ulf (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-12)
      Zoonotic infections transmitted from marine mammals to humans in the Baltic and European Arctic are of unknown significance, despite given considerable potential for transmission due to local hunt. Here we present results of an initial screening for <i>Brucella</i> spp. in Arctic and Baltic seal species. Baltic ringed seals (<i>Pusa hispida</i>, n = 12) sampled in October 2015 and Greenland Sea harp ...