Browsing Master i natur-, helse- og miljøvern by Subject "Castor fiber"
Now showing items 1-10 of 10
-
Deadwood in beaver (Castor fiber) habitat – a study with focus on polypore fungi and saproxylic insects
(Master thesis, 2020)Deadwood is known as a diversity indicator in a forest, where 20-25 % of all forest species in the Nordic countries are dependent on deadwood. 10.7 % of the saproxylic beetles in Europe and 37 % of the polypore fungi in ... -
Extra pair copulation in the Eurasian beaver (Castor fiber)?
(Master thesis, 2016)In mammalian species, primarily in rodents, primates and canids, social monogamy is found in only 3-5% species and genetic monogamy appears to be rare. There is compelling evidence that the beavers (genus Castor) are a ... -
GPS-aided mapping of Eurasian beaver (Castor fiber) territories in southern Norway
(Master thesis, 2014)In this study I use GPS technology for the first time on the monogamous semi-aquatic Eurasian Beaver (Castor fiber). I tested the hypothesis that GPS technology can be used in the riparian environment. Further I tested the ... -
Mapping of sexual and seasonal differences in Eurasian beaver (Castor fiber) behaviour using GPS in southern Norway.
(Master thesis, 2016-01-19)In mammals monogamy is often characterized in mammals by reduced sexual dimorphism. Beavers, being a monogamous species are hard to observe, due to their nocturnal and semiaquatic nature. In this study I used GPS technology ... -
Pair movement of a monogamous mammal, the Eurasian beaver
(Master thesis, 2019)Studying the cohesion of monogamous pairs is an important component in understanding their social relationships. I used the Eurasian beaver (Castor fiber) to investigate how movement patterns and space use relate to their ... -
Review of microsatellites in ecology and parentage analysis of Norwegian beavers (Castor fiber) based on cross-specific microsatellites
(Master thesis, 2009)The Eurasian Beaver (Castor fiber) in Scandinavia was once close to extinction due to a bottleneck resulting from vigorous overhunting in the middle of the 19th century. After measures of protection, the population number ... -
Selection of aquatic vegetation in river habitats by Eurasian beaver (Castor fiber) in South-Eastern Norway
(Master thesis, 2020)Habitat selection in animals is evident when the choosing of habitat is disproportionate to its availability, usually when habitat characteristics differ in quantity and quality. A very important factor of their use is the ... -
Short-term effects of bio-logging on body mass and growth of a semi-aquatic mammal, the Eurasian beaver (Castor fiber)
(Master thesis, 2020)Bio-logging is a popular method to collect scientific data in the field of animal ecology. The presumption is that bio-logging should allow the study of animals with only minor disturbance to their natural behaviour and ... -
The importance of vegetation availability in three scales on body condition, reproduction and territory size of the Eurasian beaver
(Master thesis, 2019)Availability of food resources can affect body condition and reproduction in animal populations as low food availability can lead to decreasing body condition and constrain reproduction. At the same time, spatial distribution ... -
Ørret (Salmo trutta) viser antipredatoradferd på avføring fra mink (Mustela vison) fôret på artsfrender
(Master thesis, 2011)Innførte predatorer, deriblant pattedyr, kan teoretisk utgjøre risiko for byttedyrpopulasjoner av lokale arter dersom byttedyret ikke har utviklet relevant antipredatoradferd. I hvilken grad dette er økologisk relevant ...