Browsing Biologisk institutt ( -2012) by Title
Now showing items 180-199 of 391
-
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)Background The deer ked (Lipoptena cervi), a hematophagous ectoparasite of Cervids, is currently spreading in Scandinavia. In Norway, keds are now invading the south-eastern part of the country and the ...
-
(Master thesis / Hovedoppgave, 2005)We studied a willow warbler (Phylloscopus trochilus) population breeding in Øvre Heimdalen, in Valdres, Norway. Several previous studies have found large differences in the amount of EPY (extra- pair young) in the broods ...
-
(Master thesis / Masteroppgave, 2009)I denne studien har jeg analysert forhold og faktorer som påvirker artsrikhet av flercellet zooplankton i innsjøer i Norge. Oppgaven består av to deler: den ene delen tar for seg mitt eget arbeid, som er prøvetaking for ...
-
(Master thesis / Masteroppgave, 2008)Disease in the male reproductive system seems to increase in industrialised countries. Examples are increasing rates of poor semen quality, and more cases of testicular cancer, - with Denmark and Norway having the World’s ...
-
(Master thesis / Masteroppgave, 2012)Large herbivores and their grazing impact is an important subject in ecology. It is well known that grazing shapes the structure, diversity and functioning of terrestrial ecosystems, but how the level of density dependence ...
-
(Master thesis / Masteroppgave, 2007)Polar cod (Boreogadus saida) were collected in two different fjords around Svalbard in 2006 to address their feeding ecology and growth. Kongsfjorden was sampled in spring and in autumn to investigate seasonal patterns. ...
-
(Master thesis / Hovedoppgave, 2004)The feeding behavior is favored by natural selection in the past and is based on getting a high fitness by maximizing net energy intake. Reproductive success among altricial birds is closely related to feeding strategies ...
-
(Chapter / Bokkapittel / PublishedVersion; Peer reviewed, 2012)In: Pagou, P. and Hallegraeff, G. (eds). Proceedings of the 14th International Conference on Harmful Algae. International Society for the Study of Harmful Algae and Intergovernmental Oceanographic Commission of UNESCO 2012 ...
-
(Master thesis / Masteroppgave, 2008)Many freshwater fishes are fragmented into local populations. Brown trout (Salmo trutta) is a fish that express high genetic heterogeneity and are known to be structured into genetically differentiated subpopulations ...
-
(Master thesis / Masteroppgave, 2006)Lake Finsevatnet is a regulated monomictic alpine lake situated a little north of the Hardangerjøkulen glacier in Ulvik, Hordaland county. The lake is regulated 3,3 meters at most. Lake Flakavatnet is also a monomictic ...
-
(Master thesis / Masteroppgave, 2008)Denne undersøkelsen ble utført som en del av et større tareskogsprosjekt hvis mål var å opparbeide kunnskap om biodiversitet og produksjon i tareskogsområder. Langs norskekysten domineres tareskogen av stortare Laminaria ...
-
(Master thesis / Masteroppgave, 2007)Sammendrag 37 arter fisk ble samlet inn ved hjelp av 28 tråldrag ved lokaliteter som er representative for dypvannsområdene (65-190 meter) i Oslofjorden i preioden Oktober 2004-Mai 2006. Totalt ble det samlet inn 5466 fisk. ...
-
(Master thesis / Masteroppgave, 2006)Fluctuating asymmetry (FA) as a measure of environmental stress was studied in polar bear (Ursus maritimus) skulls from East Greenland (n = 300, collected during the period 1892-2004) and Svalbard (n = 391, collected during ...
-
(Master thesis / Hovedoppgave, 2005)Abstract Patterns in time series are observational records of past ecological processes, and identifying these processes remains a major challenge to population ecologists. Until recently, analysis of time series has ...
-
The fungal community associated with roots of alpine and arctic Dryas octopetala along a latitudinal gradientRestricted Access (Master thesis / Masteroppgave, 2009)The ectomycorrhizal (ECM) dwarf shrub Dryas octopetala is one of the hardiest and most abundant of all woody plant groups in alpine and arctic environments. The main aim of this study was to characterise the fungal communities ...
-
(Doctoral thesis / Doktoravhandling, 2008)High nitrate (NO3) leaching rates have been observed in mountain and heathland areas in Europe at sites receiving high levels of nitrogen (N) deposition. These areas are characterised by sparse vegetation on thin, patchy ...
-
(Master thesis / Masteroppgave, 2005)The presence of gastrointestinal nematodes is considered to be a problem in domestic cattle, and various studies have tried to present reasons for and solutions to this problem. A study was conducted in Southern Norway in ...
-
(Master thesis / Hovedoppgave, 2005)The delimitation of the genera Anthericum and Chlorophytum has up to now been based on morphological and cytological data. In this study I discuss previous generic delimitations based on DNA sequence data from European and ...
-
(Doctoral thesis / Doktoravhandling, 2008)In most cases, the proliferation of marine planktonic alga is ecologically beneficial for the marine food web. However, harmful algal blooms can have negative effects by causing fish kills. In this PhD thesis particularly ...
-
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)Background Genetic variation has been shown to play a significant role in determining susceptibility to the salmon louse, Lepeophtheirus salmonis. However, the mechanisms involved in differential response ...