Institutt for natur, helse og miljø: Nye registreringer
Viser treff 261-280 av 321
-
Koppermangel hos oppdrettshjort
(Journal article; Peer reviewed, 2001)Raising red deer in enclosures for meat production is a relatively new practice in Norway and is based on national stocks (Cervus elaphus atlanticus). Presently only 400 - 500 hinds are reared in enclosures by 25 ... -
Investigation of small rodents as reservoirs hosts of Borrelia burgdorferi sensu lato in Lithuania and Norway
(Conference object, 2006) -
The prevalence and distribution of Borrelia burgdorferi sensu lato in host seeking Ixodes ricinus ticks in Lithuania
(Journal article; Peer reviewed, 2006)A total of 1559 unfed Ixodes ricinus (L., 1758) ticks were collected from the vegetation by flagging in 18 locations of Lithuania. The ticks were tested individually for the presence of spirochetes using polymerase chain ... -
Detection of tick-borne pathogens by molecular methods
(Journal article; Peer reviewed, 2008)The use of molecular methods such as species-specific PCR, Multiplex-PCR, RT-PCR, reverse line blot hybridisation in investigations of tick-borne pathogens allowed to detect and identify the causative agents of Lyme ... -
Diversity of thermophilic Campylobacter isolated from slaughter pigs in Norway
(Journal article; Peer reviewed, 2008)Out of 100 faecal swab samples, 88 thermophilic Campylobacter representing ten herds were isolated. The species were identified by biotyping and multiplex polymerase chain reaction (PCR). Of the isolates, 86 (97.7%) were ... -
The function of scent marking in beaver (Castor fiber) territorial defence
(Doctoral thesis; Peer reviewed, 2001)This thesis examines how scent marking in Eurasian beaver (Castor fiber) functions in territorial defence. Beavers usually deposit scent (castoreum and/or anal gland secretion (AGS)) onto small piles of mud and debris, and ... -
Methods of aquatic and terrestrial netting to capture Eurasian beavers
(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 ... -
Sex and age composition of spring-hunted Eurasian beaver in Norway
(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 ... -
Efficacy of cartridge type and projectile design in the harvest of beaver
(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) ... -
Territory ownership and familiarity status affect how much male root voles (Microtus oeconomus) invest in territory defence
(Journal article; Peer reviewed, 2008)Neighbour–stranger discrimination occurs when individuals respond with more aggression to strangers than to territorial neighbours—a phenomenon termed the “dear enemy phenomenon” (DEP). We investigated the DEP with male ... -
A gross assessment of the suitability of selected Scottish riparian habitats for beaver
(Journal article; Peer reviewed, 2000)In November 1998 we were shown a selection of riparian habitats in Scotland and asked to assess their suitability for beaver based on our experience in working with beaver elsewhere. Though many examples of good beaver ... -
Sexual dimorphism in the development of scent structures for the obligate monogamous Eurasian beaver (Castor fiber)
(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 ... -
Use of dawn and dusk sight observations to determine colony size and family composition in Eurasian beaver Castor fiber
(Journal article; Peer reviewed, 2006)The methods used to determine family composition and colony size in Eurasian beaver Castor fiber Linnaeus, 1758 are often poorly described in published reports. Here we show how repeated counts of colony size in a random ... -
Blitzfotografering av bevegelige objekter gjennom mikroskop
(Journal article, 1981)Ordinary microscopes can be adapted to fully automatic photomicroscopes for use with flash. An automatic small film camera with an autodynamic flash and extra equipment for microphotography is necessary. The camera's ... -
Collapsing burrow causes death of a Eurasian beaver, Castor fiber
(Journal article; Peer reviewed, 2004)The death of a Eurasian Beaver Castor fiber caused by a collapsing burrow in southeast Norway is reported. Two days of heavy rainfall had presumably caused the burrow to collapse, suffocating the animal. -
Resident beavers (Castor canadensis) do not discriminate between castoreum scent marks from simulated adult and subadult male intruders
(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 ... -
Simulated winter browsing may lead to induced susceptibility of willows to beavers in spring
(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 ... -
Tool-use in a display behaviour by Eurasian beavers ( Castor fiber )
(Journal article; Peer reviewed, 2007)Tool use is rare amongst rodents and has never been recorded in connection with agonistic displays. We witnessed a behaviour, stick display (StD), involving tool use in free-living Eurasian beavers (Castor fiber) that we ... -
Beaver management in Norway : a model for continental Europe?
(Journal article; Peer reviewed, 2003)While Norway has been managing beaver (Castor fiber) for more than 150 years, most central European countries have little experience and none are presently harvesting beaver, despite rapidly growing populations and conflicts. ... -
Territoriality and time budgets in beavers during sequential settlement
(Journal article; Peer reviewed, 1994)Beavers (Castor fiber) were sequentially released into a previously unoccupied area. The settlement of the animals approximated an ideal despotic distribution: they successively settled in rich habitat and then in poor ...