Browsing Institutt for biologi by Title
Now showing items 2038-2057 of 2615
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Sammenlikning av mekanisk og termisk avlusing: Klekkesuksess og larveutvikling fra eggstrenger med vurdering av smittepotensial hos lakselus (Lepeophtheirus salmonis)
(Master thesis, 2022)Norsk lakseoppdrett har hatt en god økonomisk og produksjonsmessig vekst siden 2000-tallet. De siste årene har produksjonen likevel stagnert på grunn av utfordringer med lakselus (Lepeophtheirus salmonis Krøyer, 1837). ... -
Savannah trees buffer herbaceous plant biomass against wild and domestic herbivores
(Journal article; Peer reviewed, 2019)Questions Given the growing abundance and dominance of domestic herbivores in savannah ecosystems, can trees maintain plant herbaceous standing biomass under increasing herbivore pressure? Are there differences in the ... -
Scavenger community structure along an environmental gradient from boreal forest to alpine tundra in Scandinavia
(Journal article; Peer reviewed, 2020)Scavengers can have strong impacts on food webs, and awareness of their role in ecosystems has increased during the last decades. In our study, we used baited camera traps to quantify the structure of the winter scavenger ... -
Scenariofremstilling: inntak av dioksiner og PCB fra krabbe. Uttalelse fra Faggruppen for forurensninger, naturlige toksiner og medisinrester i matkjeden
(VKM Report;, Research report, 2010)Det er fastsatt øvre grenseverdier for dioksiner og dioksinliknende (dl) PCB i næringsmidler inkludert hvitt krabbekjøtt, men ikke i brun krabbemat. I tilknytning til sterkt forurensede områder langs kysten har Mattilsynet ... -
A schematic sampling protocol for contaminant monitoring in raptors
(Peer reviewed; Journal article, 2020)Birds of prey, owls and falcons are widely used as sentinel species in raptor biomonitoring programmes. A major current challenge is to facilitate large-scale biomonitoring by coordinating contaminant monitoring activities ... -
Schoolchildren as informants about bushmeat consumption in Western Serengeti
(Journal article; Peer reviewed, 2019)Bushmeat contributes to household food security in Western Serengeti, particularly for low-income families who are unable to afford more expensive meat sources. However, as the human population grows, bushmeat demand is ... -
Scientific knowledge in the age of computation: Explicated, computable and manageable?
(Journal article; Peer reviewed, 2019)With increasing publication and data production, scientific knowledge stands not simply as an achievement but also as a challenge. Scientific publications and data are increasingly treated as resources that need to be ... -
Screening new PFAS compounds 2018
(NILU rapport;, Research report, 2019)This screening project has focused on the occurrence of conventional andemerging PFASs in terrestrial and marine environments, including the Arctic. Conventional PFASs were found to be wide-spread in the environment and ... -
Sea ice loss increases genetic isolation in a high Arctic ungulate metapopulation
(Peer reviewed; Journal article, 2019)Sea ice loss may have dramatic consequences for population connectivity, extinction–colonization dynamics, and even the persistence of Arctic species subject to climate change. This is of particular concern in face of ... -
Sea ice thermohaline dynamics and biogeochemistry in the Arctic Ocean: Empirical and model results
(Journal article; Peer reviewed, 2017)Large changes in the sea ice regime of the Arctic Ocean have occurred over the last decades justifying the development of models to forecast sea ice physics and biogeochemistry. The main goal of this study is to evaluate ... -
Sea lice (Lepeophtheirus salmonis and Caligus elongatus) during freshwater treatment
(Master thesis, 2019)Siden begynnelsen på 1960-tallet, har lus vært et problem for fiskevelferden for akvakultur næringen i Norge. Lusen har en større økonomisk påvirkning enn noen annen parasitt, og Lepeophteirus salmonis har blitt indentifisert ... -
Sea or summit? Wild reindeer spatial responses to changing high-arctic winters
(Peer reviewed; Journal article, 2021)Because of climate change, wildlife is facing altered environments, including profound shifts in temperature and precipitation regimes. In snow-dominated ecosystems, winter warming and resulting changes in snowpack properties ... -
Seabird Migration Strategies: Flight Budgets, Diel Activity Patterns, and Lunar Influence
(Peer reviewed; Journal article, 2021)Every year, billions of birds undertake extensive migrations between breeding and non-breeding areas, facing challenges that require behavioural adjustments, particularly to flight timing and duration. Such adjustments in ... -
Seabirds as guides for fisheries management: European shag Phalacrocorax aristotelis diet as indicator of saithe Pollachius virens recruitment
(Journal article; Peer reviewed, 2018)In fisheries management, assessing year-class strength and recruitment to commercial stocks is essential, but can be difficult to do for fish species where the young stages are inaccessible to ship-based surveys. This is ... -
Seabirds during Arctic Polar Night: underwater observations from Svalbard archipelago, Norway
(Journal article; Peer reviewed, 2017)Visually-oriented predators, such as seabirds, are highly light dependent, and thus their presence and activity under continuously dark conditions of Arctic polar night pose a number of questions about the strategies and ... -
Seasonal and annual variation in the diet of brown bears Ursus arctos in the boreal forest of southcentral Sweden
(Journal article; Peer reviewed, 2016)Understanding a species' feeding ecology is essential for successful management and conservation, because food abundance can influence body mass, survival, reproductive success, movements, and habitat use. We describe ... -
Seasonal and Diurnal Variation in Habitat Overlap of Roe Deer and Eurasian Lynx in a Human-Dominated Landscape
(Master thesis, 2015)Predators affect prey directly (lethally), and indirectly (non-lethally), by altering their behaviour as they try to maximise habitat overlap with prey. Prey, on the other hand, are trying to minimise habitat overlap with ... -
Seasonal and inter-male variation in spermatogenesis in farmed Atlantic salmon (Salmo salar) during the last year of sexual maturation
(Master thesis, 2016)Reproductive patterns in male teleost fish have received relatively little attention compared to those of their female counterparts. Testis maturation and progression in spermatogenesis are usually described with a combination ... -
Seasonal changes in growth and composition of the kelp Saccharina latissima cultivated in salmon-driven IMTA
(Master thesis, 2014)The primary objective of this Master s thesis was to study the growth and biochemical composition of Saccharina latissima in salmon-driven IMTA. The differences in the seasonal changes in growth and composition between ... -
Seasonal Changes in Photoperiod: Effects on Growth and Redox Signaling Patterns in Atlantic Salmon Postsmolts
(Peer reviewed; Journal article, 2023)Farmed Atlantic salmon reared under natural seasonal changes in sea-cages had an elevated consumption of antioxidants during spring. It is, however, unclear if this response was caused by the increase in day length, ...