Blar i USN Open Archive på forfatter "Rosell, Frank"
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Mitochondrial phylogeography of the Eurasian beaver Castor fiber L.
Durka, Walter; Babik, Wieslaw; Ducroz, Jean-Francois; Heidecke, Dietrich; Rosell, Frank; Samjaa, Ravcigijn; Saveljev, Alexander P.; Stubbe, Annegret; Ulevicius, Alius; Stubbe, Michael (Journal article; Peer reviewed, 2005)Nucleotide variation in an approximately 490 bp fragment of the mitochondrial DNA control region (mtDNA CR) was used to describe the genetic variation and phylogeographical pattern in the Eurasian beaver ( Castor fiber ) ... -
Odorant source used in Eurasian beaver territory marking
Rosell, Frank; Sundsdal, Lars Jøran (Journal article; Peer reviewed, 2001)Mammals use urine, feces, or the secretion of specialized skin glands to mark their territories. These sources can carry different information and, thus, have different functions. Presently it is not known if beavers (Castor ... -
Parturition dates for Eurasian beavers Castor fiber: when should spring hunting cease?
Parker, Howard; Rosell, Frank (Journal article; Peer reviewed, 2001)Hunting Eurasian beaver Castor fiber with firearms during late spring is the dominating harvest form in Norway but may violate the Norwegian wildlife management principle of not hunting during the breeding season. In ... -
Performance of GPS units for deployment on semiaquatic animals
Justicia, Lia Schlippe; Rosell, Frank; Mayer, Martin (Journal article; Peer reviewed, 2018)Global Positioning System (GPS) technology is widely used in wildlife research to study animal movement and habitat use. In order to evaluate the quality and reliability of GPS data, the factors influencing the performance ... -
Pine marten, Martes martes, as an Eurasian beaver, Castor fiber, lodge occupant and possible predator
Rosell, Frank; Hovde, Bjørnar (Journal article; Peer reviewed, 1998)We trapped three adult Eurasian Pine Martens (Martes martes) at an earlier trapped-out Eurasian Beaver (Castor fiber) lodge in southem Norway. At another site, Pine Marten feces containing remains of beaver claws and hair ... -
Population and distribution of beavers Castor fiber and Castor canadensis in Eurasia
Halley, Duncan John; Saveljev, Alexander P.; Rosell, Frank (Peer reviewed; Journal article, 2020)1. A century ago, overhunting had reduced Eurasian beaver Castor fiber populations to c. 1200 animals in scattered refugia from France to Mongolia. Reintroductions and natural spread have since restored the species to large ... -
Population and distribution of European beavers (Castor fiber)
Halley, Duncan J.; Rosell, Frank (Journal article; Peer reviewed, 2003)After being reduced to about 1,200 animals in eight isolated populations by the beginning of the 20th century, European beavers (Castor fiber) have powerfully recovered in both range and population, through relaxation of ... -
Potential risks of olfactory signaling : the effect of predators on scent marking by beavers
Rosell, Frank; Sanda, Jørn Ingar (Journal article; Peer reviewed, 2006)Mammals scent mark their territories to advertise occupancy and ownership. However, signaling with scent for territorial defense can have a negative effect by advertising an individual’s presence and location to predators. ... -
Red fox, Vulpes vulpes, kills a European beaver, Castor fiber, kit
Kile, Nils B.; Nakken, Petter J.; Rosell, Frank; Espeland, Sigurd (Journal article; Peer reviewed, 1996)We observed an adult Red Fox (Vulpes vulpes) attack, kill and partially consume a 2-month-old female kit European Beaver (Castor fiber) near its lodge in Norway. The inner organs were consumed first. One adult beaver ... -
Resident beavers (Castor canadensis) do not discriminate between castoreum scent marks from simulated adult and subadult male intruders
Herr, Jan; Müller-Schwarze, Dietland; Rosell, Frank (Journal article; Peer reviewed, 2006)Subadult intruding beavers (Castor spp.) could be expected to pose a higher threat than adults to territory holders because, unlike adults who usually own a territory, subadults need to acquire a territory and a mate to ... -
Responses of foraging Eurasian beavers Castor fiber to predator odours
Rosell, Frank; Czech, Andrzej (Journal article; Peer reviewed, 2000)The ability of Eurasian beavers Castor fiber to recognise different predator odours has received little research, nor has the use of predator odours to deter Eurasian beavers from damaging agricultural crops, fruit and ... -
Scent-marking in the Eurasian beaver (Castor fiber) as a means of territory defense
Rosell, Frank; Bergan, Frode; Parker, Howard (Journal article; Peer reviewed, 1998)Beaver (Castor spp.) normally scent mark by depositing castoreum and/or anal gland secretion on scent mounds close to the water's edge. The aim of this study was to investigate the hypothesis that the Eurasian beaver (C. ... -
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 ... -
Selective foraging on woody plant species by the Eurasian beaver (Castor fiber) in Telemark, Norway
Haarberg, Orsolya; Rosell, Frank (Journal article; Peer reviewed, 2006)Beavers Castor spp. are generalist herbivores, feeding on the bark, shoots and leaves of woody plants, terrestrial herbs and forbs, ferns and aquatic vegetation. As central-place foragers, beavers move out from water to ... -
Sex and age composition of spring-hunted Eurasian beaver in Norway
Parker, Howard; Rosell, Frank; Hermansen, Tore André; Sørløkk, Gjermund; Stærk, Martin (Journal article; Peer reviewed, 2002)In Norway, Sweden and Finland most Eurasian beaver (Castor fiber) harvested are shot in April and May. As beaver cannot be sexed or effectively aged under spring hunting conditions, hunters normally shoot the first animal ... -
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 ... -
Sexual dimorphism in territorial scent marking by adult eurasian beavers (Castor fiber)
Rosell, Frank; Thomsen, Liat R. (Journal article; Peer reviewed, 2006)Mammalian scent marking is often associated with territorial defense. However, males and females may demonstrate different activity patterns and play different roles. Female mammals nurture the young during lactation, while ... -
Sexual dimorphism in the development of scent structures for the obligate monogamous Eurasian beaver (Castor fiber)
Rosell, Frank; Schulte, Bruce A. (Journal article; Peer reviewed, 2004)Scent marking is a common form of territorial demarcation in mammals and differential marking by the sexes may select for differences in scent gland developmental rates or size. Rates of marking reflect level of defense ... -
Simulated winter browsing may lead to induced susceptibility of willows to beavers in spring
Veraart, Annelies J.; Nolet, Bart A.; Rosell, Frank; de Vries, Peter P. (Journal article; Peer reviewed, 2006)Browsing may lead to an induced resistance or susceptibility of the plant to the herbivore. We tested the effect of winter browsing by Eurasian beavers (Castor fiber L., 1758) on food quality of holme willows (Salix ... -
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 ...