Browsing USN Open Archive by Author "Steifetten, Øyvind"
Now showing items 1-11 of 11
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A comparative analysis of Merlin and BirdNet applications for accurate bird species identification through passive acoustic monitoring
Joachin Godinez, Emilio Antonio (Master thesis, 2024)In recent years, passive acoustic monitoring (PAM) has emerged as a powerful tool for monitoring avian biodiversity. However, a major challenge has been to develop algorithms that can process large amounts of data, and at ... -
Development and evaluation of 16 new microsatellite loci for the rock ptarmigan (Lagopus muta) and cross-species amplification for the willow grouse (L. lagopus)
Costanzi, Jean-Marc; Bergan, Frode; Sæbø, Mona; Jenkins, Andrew; Steifetten, Øyvind (Journal article; Peer reviewed, 2018)Abstract The genetic markers designed for this study can facilitate future genetic studies on the rock ptarmigan (Lagopus muta). To our knowledge no microsatellite markers have ever been developed specifically for this ... -
Do bank voles (Myodes glareolus) trapped in live and lethal traps show differences in tick burden?
De Pelsmaeker, Nicolas; Korslund, Lars; Steifetten, Øyvind (Peer reviewed; Journal article, 2020)In studies assessing tick abundance, the use of live traps to capture and euthanize rodent hosts is a commonly used method to determine their burden. However, captive animals can experience debilitating or fatal capture ... -
Does temperature affect breeding success in cavity nesting birds?
Leikvoll, Erik (Master thesis, 2022)Nest box provision is used as a method to provide secondary cavity nesters with nesting spaces in areas where natural tree cavities are scarce. Orientation have been identified as a factor affecting the nest box temperature, ... -
High-elevational occurrence of two tick species, Ixodes ricinus and I. trianguliceps, at their northern distribution range
De Pelsmaeker, Nicolas; Korslund, Lars; Steifetten, Øyvind (Journal article; Peer reviewed, 2021)Background: During the last decades a northward and upward range shift has been observed among many organisms across different taxa. In the northern hemisphere, ticks have been observed to have increased their latitudinal ... -
Host in reserve: The role of common shrews (Sorex araneus) as a supplementary source of tick hosts in small mammal communities influenced by rodent population cycles
De Pelsmaeker, Nicolas; Korslund, Lars; Steifetten, Øyvind (Peer reviewed; Journal article, 2022)Rodents often act as important hosts for ticks and as pathogen reservoirs. At north -ern latitudes, rodents often undergo multi- annual population cycles, and the peri -odic absence of certain hosts may inhibit the survival ... -
Island biogeography theory explains the genetic diversity of a fragmented rock ptarmigan (Lagopus muta) population
Costanzi, Jean-Marc; Steifetten, Øyvind (Peer reviewed; Journal article, 2019)The island biogeography theory is one of the major theories in ecology, and its applicability to natural systems is well documented. The core model of the theory, the equilibrium model of island biogeography, predicts that ... -
Lone male loser? Effects of spatial isolation on male pairing success in the ortolan bunting Emberiza hortulana
Steifetten, Øyvind; Starholm, Trude; Dale, Svein (Peer reviewed; Journal article, 2023)In small, isolated or fragmented bird populations, past studies have shown that there can be a high proportion of unpaired males. Low male pairing success is suggested to be the result of female-biased natal dispersal and ... -
Subspecies discrimination in the Scandinavian beaver (Castor fiber): combining behavioral and chemical evidence
Rosell, Frank; Steifetten, Øyvind (Journal article; Peer reviewed, 2004)Geographic isolation is one of several models that has been proposed to explain the evolutionary course of speciation. In this study, we examined how geographical isolation may affect subspecies discrimination in the ... -
Use of dawn and dusk sight observations to determine colony size and family composition in Eurasian beaver Castor fiber
Rosell, Frank; Parker, Howard; Steifetten, Øyvind (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 ... -
Use of linear and areal habitat models to establish and distribute beaver Castor fiber harvest quotas in Norway
Parker, Howard; Steifetten, Øyvind; Uren, Gisle; Rosell, Frank (Journal article; Peer reviewed, 2013)In Norway the Eurasian beaver Castor fiber harvest is quota-regulated. Once the annual quota for each municipality has been determined it is distributed to landowner-organized beaver management units. Municipal wildlife ...