Browsing USN Open Archive by Author "Rosell, Frank"
Now showing items 21-40 of 75
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Do Eurasian beavers smear their pelage with castoreum and anal gland secretion
Rosell, Frank (Journal article; Peer reviewed, 2002)The scent-matching hypothesis postulates that scent marks provide an olfactory link between a resident owner and his territory, and that this enables intruding animals to recognize the chance of escalated conflicts. However, ... -
Echinococcus multilocularis Detection in Live Eurasian Beavers (Castor fiber) Using a Combination of Laparoscopy and Abdominal Ultrasound under Field Conditions
Campbell-Palmer, Róisín; Del Pozo, Jorge; Gottstein, Bruno; Girling, Simon; Cracknell, John; Schwab, Gerhard; Rosell, Frank; Pizzi, Romain (Journal article; Peer reviewed, 2015-07-15)Echinococcus multilocularis is an important pathogenic zoonotic parasite of health concern, though absent in the United Kingdom. Eurasian beavers (Castor fiber) may act as a rare intermediate host, and so unscreened wild ... -
Ecological impact of beavers Castor fiber and Castor canadensis and their ability to modify ecosystems
Rosell, Frank; Bozser, Orsolya; Collen, Peter; Parker, Howard (Journal article; Peer reviewed, 2005)The genus Castor comprises two species: the Eurasian beaver Castor fiber, and the North American beaver Castor canadensis. Both species suffered from overexploitation, but have seen a revival since the 1920s due to increased ... -
Effectiveness of predator odors as gray squirrel repellents
Rosell, Frank (Journal article; Peer reviewed, 2001)The ability of gray squirrels (Sciurus carolinensis) to discriminate between different predator odors and the use of predator odors to deter gray squirrels from foraging on plants have not been previously investigated. To ... -
Efficacy of cartridge type and projectile design in the harvest of beaver
Parker, Howard; Rosell, Frank; Danielsen, Johan (Journal article; Peer reviewed, 2006)In Norway, Sweden, and Finland most beavers (Castor spp.) harvested are shot with center-fire rifles. Shooting entails problems not encountered in trapping including pelt damage from bullet holes (body shots are common) ... -
Environmental DNA analyses for detecting the Eurasian beaver (Castor fiber) and assessing biodiversity: a metabarcoding and qPCR study
Bouhouche, Meriem (Master thesis, 2023)Environmental DNA (eDNA) is a relatively new method that has emerged as a promising tool for detecting biodiversity. In this study, I tested the efficacy of using eDNA extracted from water samples of two rivers in Norway, ... -
Errors associated with moose-hunter counts of occupied beaver Castor fiber lodges in Norway
Parker, Howard; Rosell, Frank; Gustavsen, Per Øyvind (Journal article; Peer reviewed, 2002)In Norway, Sweden and Finland moose Alces alces hunting teams are often employed to survey occupied beaver (Castor fiber and C. canadensis) lodges while hunting. Results may be used to estimate population density or trend, ... -
Eurasian beavers (Castor fiber) behavioral response to simulated territorial intruders
Rosell, Frank; Johansen, Geir; Parker, Howard (Journal article; Peer reviewed, 2000)Eurasian beavers (Castor fiber) live in family groups that defend territories against other conspecifics. Part of this territorial defence involves constructing scent mounds near the stream bank within territories and ... -
European beaver, Castor fiber, pinned by a felled tree
Kile, Nils B.; Rosell, Frank (Journal article; Peer reviewed, 1996)The death of an adult European Beaver (Castor fiber) caused by a felled tree in Southeast Norway is reported. The trunk fell on the beaver's tail pinning it to the ground. -
Extra-territorial movements differ between territory holders and subordinates in a large, monogamous rodent
Mayer, Martin; Zedrosser, Andreas; Rosell, Frank (Journal article; Peer reviewed, 2017)Territorial animals carry out extra-territorial movements (forays) to obtain pre-dispersal information or to increase reproductive success via extra-pair copulation. However, little is known about other purposes and spatial ... -
Factors affecting scent-marking behavior in Eurasian beaver (Castor fiber)
Rosell, Frank; Nolet, Bart A. (Journal article; Peer reviewed, 1997)We tested the hypothesis that a main function of territory marking in Eurasian beaver (Castor fiber) is defense of the territory. The results showed that. (1) beaver colonies with close neighbors scent-mark more often than ... -
Fears from the past? The innate ability of dogs to detect predator scents
Samuel, Lydia; Arnesen, Charlotte Holmstad; Zedrosser, Andreas; Rosell, Frank (Peer reviewed; Journal article, 2020)Throughout the animal kingdom, antipredator mechanisms are an evolutionary driving force to enable the survival of species classified as prey. Information regarding a predator’s location can be determined through chemosensory ... -
Field anaesthetic and surgical techniques for implantation of intraperitoneal radio transmitters in Eurasian beavers Castor fiber
Ranheim, Birgit; Rosell, Frank; Haga, Henning Andreas; Arnemo, Jon Martin (Journal article; Peer reviewed, 2004)Radio transmitters were implanted intraperitoneally in 22 (nine females, 13 males) adult, territorial Eurasian beavers Castor fiber under field conditions. Two different injectable anaesthestic drug combinations were tested. ... -
Free-ranging Eurasian beavers, Castor fiber, deposit anal gland secretion when scent marking
Rosell, Frank; Bergan, Frode (Journal article; Peer reviewed, 1998)Two adult free-ranging Eurasian Beavers (Castor fiber) were observed depositing anal gland secretion at the border of thei territory byeverting the "cloaca", protruding the anal gland openings and rubbing them against the ... -
Harvesting of males delays female breeding in a socially monogamous mammal : the beaver
Rosell, Frank; Mysterud, Atle (Journal article; Peer reviewed, 2007)Human exploitation may skew adult sex ratios in vertebrate populations to the extent that males become limiting for normal reproduction. In polygynous ungulates, females delay breeding in heavily harvested populations, but ... -
Invasive North American beaver Castor canadensis in Eurasia: a review of potential consequences and a strategy for eradication
Parker, Howard; Nummi, Petri; Hartman, Göran; Rosell, Frank (Journal article; Peer reviewed, 2012-12)Seven North American beavers Castor canadensis (Cc) were introduced into Finland in 1937 to supplement an ongoing reintroduction of the nearly extinct Eurasian beaver C. fiber (Cf). At that time, many zoologists recognised ... -
Investigations of waterborne pathogens in Eurasian beaver (Castor fiber) from Telemark county, Southeast Norway
Rosell, Frank; Rosef, Olav; Parker, Howard (Journal article; Peer reviewed, 2001)The presence of pathogenic bacteria and parasites in drinking water is a well-known cause of human disease outbreaks. There is however, a lack of knowledge of the contamination routes to water. In Norway, the supply of ... -
Landscape use and economic value of Eurasian beaver (Castor fiber) on large forest in southeast Norway
Parker, Howard; Haugen, Asbjørn; Kristensen, Øystein; Myrum, Erik; Kolsing, Ronni; Rosell, Frank (Conference report, 1999)Though numerous studies of damage caused by beaver (Castor canadensis and C. fiber) to commercially managed forests have been conducted, few have incorporated the economic advantages beaver can create for forest owners. ... -
Methods for live-trapping beaver (Castor spp.)
Rosell, Frank; Kvinlaug, Jan Kåre (Journal article; Peer reviewed, 1998)Effective live-trapping of beaver (Castor spp.) has been and will continue to be necessary for introductions, re-introductions, translocation for the preservation of populations, removal of nuisance beaver, and to obtain ... -
Methods of aquatic and terrestrial netting to capture Eurasian beavers
Rosell, Frank; Hovde, Bjørnar (Journal article; Peer reviewed, 2001)Effective live-trapping of beavers (Castor spp.) has been and will continue to be necessary for introductions, re-introductions, translocation, or to obtain animals for breeding and zoological gardens. Here we describe a ...