Blar i Institutt for biologi på tittel
Viser treff 1381-1400 av 2613
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Lacustrine fish community turnover on a century time scale in south-eastern Norway
(Master thesis, 2020)Menneskelig aktiviteter har bidratt til store endringer i økosystemer det siste århundret. Ferskvannsøkosystemer er spesielt sårbare mot antropogene aktiviteter som forårsaker endringer i biodiversitet. På grunn av ... -
Lakselusinfestasjon, velferd og tilvekst hos Atlantisk laks (Salmo salar) i nedsenket drift
(Bachelor thesis, 2024)Havbruksnæringa står ovenfor flere velferd-, miljø- og arealutfordringer. For å bidra til å løse denne problematikken er det utviklet nye teknologiske løsninger, inkludert oppdrettsanlegg med nedsenket drift. Fra 2019 ble ... -
Land of retreating glaciers – checklist of liverworts on Svalbard
(Journal article; Peer reviewed, 2021)The checklist of liverworts of the Svalbard archipelago contains all published data on the occurrence of liverworts in the Svalbard archipelago. The list includes 105 species, five more reported species that only doubtfully ... -
Land use and habitat selection by small mammals in the Tanzanian Greater Serengeti Ecosystem
(Peer reviewed; Journal article, 2021)Habitat selection is central to shaping the abundance and distribution of organisms in space and time. We analysed land use (National Park, pastoralism and agriculture) and habitat selection by small mammals in the Tanzanian ... -
Langtidseffekter av ulik fôrkvalitet på kroppssammensetning og overlevelse hos sebrafink (Taeniopygia guttata)
(Master thesis, 2010)Et individs utvikling påvirkes av mange ytre og indre faktorer, og betydningen av slike faktorer er størst tidlig i livet. Hos fugler skjer det meste av vekst og utvikling i løpet av de første leveukene, og påvirkning som ... -
Large hawk-cuckoo Hierococcyx sparveroides parasitism on the Chinese babax Babax lanceolatus may be an evolutionary recent host-parasite system
(Journal article; Peer reviewed, 2012)We documented brood parasitism by the poorly studied Large Hawk-Cuckoo on a previously unknown host species, the Chinese Babax. Furthermore, we describe a new egg colour for the Large Hawk-Cuckoo. The parasitism rate of ... -
Large Scale Geographical Mapping of Essential Oil Volatiles in Heracleum (Apiaceae): Identification of Novel Compounds and Unraveling Cryptic Variation
(Journal article; Peer reviewed, 2018)Conspecific populations of plants in their native range are expected to show considerable variation due to long‐term ecological and evolutionary factors. We investigated the levels of secondary metabolites in Heracleum ... -
Large-effect loci mediate rapid adaptation of salmon body size after river regulation
(Peer reviewed; Journal article, 2022)Understanding the potential of natural populations to adapt to altered environments is becoming increasingly relevant in evolutionary research. Currently, our understanding of adaptation to human alteration of the environment ... -
Large-scale spatiotemporal variation in road mortality of moose: Is it all about population density?
(Journal article; Peer reviewed, 2011)Ungulate‐vehicle collisions (UVC) constitute a widespread and increasing problem in large parts of the world. This has generated an intensive search for mitigating measures, but often based on a weak understanding of the ... -
Later at higher latitudes: large-scale variability in seabird breeding timing and synchronicity
(Journal article; Peer reviewed, 2016-05-28)In seasonal environments, organisms are expected to optimally schedule reproduction within an annual range of environmental conditions. Latitudinal gradients generate a range of seasonality to which we can expect adaptations ... -
Lead concentrations in blood from incubating common eiders (Somateria mollissima) in the Baltic Sea.
(Journal article; Peer reviewed, 2020)Here we investigate if lead may be a contributing factor to the observed population decline in a Baltic colony of incubating eiders (Somateria mollissima). Body mass and blood samples were obtained from 50 incubating female ... -
Lead isotopic signatures in blood from incubating common eiders (Somateria mollissima) in the central Baltic Sea
(Peer reviewed; Journal article, 2020)The Christiansø colony of common eiders (Somateria mollissima) in the central Baltic Sea were exposed to high levels of Pb during the 2018 breeding season that were not present in 2017. Due to these high Pb blood levels, ... -
Leads in Arctic pack ice enable early phytoplankton blooms below snow-covered sea ice
(Journal article; Peer reviewed, 2017)The Arctic icescape is rapidly transforming from a thicker multiyear ice cover to a thinner and largely seasonal first-year ice cover with significant consequences for Arctic primary production. One critical challenge is ... -
Leaf it to the professionals: Branching out to restore deciduous forests in southern Norway.
(Master thesis, 2023)While restoration endeavors in Scandinavia and Northern Europe have predominantly concentrated on boreal forests, the often-overlooked boreonemoral forests, sharing similar characteristics, demand equal attention. These ... -
Legacy and emerging organohalogenated compounds in feathers of Eurasian eagle-owls (Bubo bubo) in Norway: Spatiotemporal variations and associations with dietary proxies (δ13C and δ15N)
(Peer reviewed; Journal article, 2021)The occurrence of organohalogenated compounds (OHCs) in wildlife has received considerable attention over the last decades. Among the matrices used for OHCs biomonitoring, feathers are particularly useful as they can be ... -
Legacy and emerging per- and polyfluorinated alkyl substances (PFASs) in sediment and edible fish from the Eastern Red Sea
(Journal article; Peer reviewed, 2021) -
Lessons from an extinction : Population dynamics of a population of green rumped parrotlets in decline
(Master thesis, 2024)Dagens rate for utdøing er mange ganger høyere enn de normale bakgrunnsrate de siste 10 millioner årene, og populasjonstørrelser rundt om i verden er i ferd med å bli redusert til farlige nivåer. Endret arealbruk antas å ... -
Levels and Effects of Organohalogenated Contaminants on Thyroid Hormone Levels in Glaucous Gulls (Larus hyperboreus) from Kongsfjorden, Svalbard.
(Master thesis, 2011)The glaucous gull (Larus hyperboreus) is one of the largest flying top predators in the Arctic and is exposed to rather high levels of different persistent organohalogenated contaminants (OHCs). The present study investigated ... -
Levels and Effects of Organohalogens on Corticosterone Hormones in glaucous gulls (Larus hyperboreus) from Kongsfjorden, Svalbard
(Master thesis, 2014)Long-range atmospheric transport, ocean currents, sea ice and rivers are transporting environmental contaminants into the Arctic. Some of these contaminants can reach high concentrations in the upper trophic levels in the ...