Browsing Institutt for natur, helse og miljø by Title
Now showing items 91-110 of 320
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Elvesnelle Equisetum flutiatile på vandring. Endringer i en elvesnellepopulasjon gjennom 29 år etter vannstandssenkning
(Journal article; Peer reviewed, 2017)Etter omfattende naturinngrep vil det alltid bli store konsekvenser for vegetasjonen i de berørte områdene. De artene som ikke er tilpasset de nye økologiske miljøforholdene vil med tiden enten dø, eller de må forflytte ... -
Emerging trends of the illegal wildlife trade in Mesoamerica
(Peer reviewed; Journal article, 2020)Mesoamerica is the world's third largest biodiversity hotspot and has c. 4,000 wildlife species protected under CITES. Despite the high biodiversity in the region, there is limited global attention, data and funding for ... -
Environmental factors influencing mercury speciation in Subarctic and Boreal lakes
(Journal article; Peer reviewed, 2014)Environmental drivers of total mercury (TotHg) concentrations, methylmercury (MeHg) concentrations, and MeHg fractions (a proxy for methylation potential, expressed as %MeHg) were assessed in a synoptic study of 51 lakes ... -
Errors associated with moose-hunter counts of occupied beaver Castor fiber lodges in Norway
(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, ... -
Estimation of lichen biomass with emphasis on reindeer winter pastures at Hardangervidda, S Norway
(Journal article; Peer reviewed, 2014)Quantification of lichen abundance is important for management of reindeer populations. We measured dry lichen biomass in 876 micro plots (16.5 cm - 16.5 cm) systematically sampled within 219 vegetation plots (2 m - 2 m) ... -
Etterutdanning for helserådspersonell. 11.-15. august 1980. Utferdsbeskrivelse
(Working paper, 1980) -
Eurasian beavers (Castor fiber) behavioral response to simulated territorial intruders
(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
(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. -
Experimental infection of lambs with tick-borne encephalitis virus and co-infection with Anaplasma phagocytophilum.
(Journal article; Peer reviewed, 2019)Tick-borne encephalitis virus (TBEV) is a zoonotic pathogen which may cause tick-borne encephalitis (TBE) in humans and animals. More than 10,000 cases of TBE are reported annually in Europe and Asia. However, the knowledge ... -
Extra-territorial movements differ between territory holders and subordinates in a large, monogamous rodent
(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)
(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 ... -
Factors determining parasite abundance in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic charr, Salvelinus alpinus, in an oligotrophic lake, southern Norway
(Peer reviewed; Journal article, 2020)Temporal and spatial variations in macroparasite status were investigated in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic charr, Salvelinus alpinus in Lake Norsjø (Southern Norway), ... -
Faecal spectroscopy: a practical tool to assess diet quality in an opportunistic omnivore
(Journal article; Peer reviewed, 2012)Faecal indices of dietary quality can provide useful knowledge about the general ecology of a species, but only if the measurements are accurate and the results are interpreted with caution. In this article, we evaluated ... -
Fear the reaper: ungulate carcasses may generate an ephemeral landscape of fear for rodents
(Journal article; Peer reviewed, 2020)Animal carcasses provide an ephemeral pulse of nutrients for scavengers that use them. Carcass sites can increase species interactions and/or ephemeral, localized landscapes of fear for prey within the vicinity. Few studies ... -
Fears from the past? The innate ability of dogs to detect predator scents
(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 ... -
Fertilizing behavior of extract of organomineral-activated biochar: low-dose foliar application for promoting lettuce growth
(Peer reviewed; Journal article, 2021)Background: Fostering plant growth and improving agricultural yields by adding “macro”-sized biochar to soil has been extensively explored. However, the impact and mechanism of action of aqueous extracts of biochar applied ... -
Field anaesthetic and surgical techniques for implantation of intraperitoneal radio transmitters in Eurasian beavers Castor fiber
(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. ... -
First 10Be measurements at Trondheim 1 MV AMS
(Journal article; Peer reviewed, 2018)The performance of the Trondheim 1 MV AMS system for 10Be measurements has been investigated. While the initial acceptance tests were done using the 1 + 1+ charge state, we concluded that the 2 + 2+ charge state offers ... -
Forests buffer the climate-induced decline of body mass in a mountain herbivore
(Peer reviewed; Journal article, 2021)Climate change is known to affect key life-history traits, such as body mass, reproduction, and survival in many species. Animal populations inhabiting mountain habitats are adapted to extreme seasonal environmental ... -
Formalin treatments before eyeing and hand-picking of Arctic charr (Salvelinus alpinus) eggs; re-evaluating the timing of antifungal treatments
(Peer reviewed; Journal article, 2019)Arctic charr (Salvelinus alpinus) eggs in hatcheries are treated for fungal infections using formalin before, and hand-picking during the eyed stage. The relative effectiveness of these two treatments was evaluated using ...