Blar i Institutt for biologi på tittel
Viser treff 1962-1981 av 2514
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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, ... -
Seasonal dynamics of microzooplankton communities in the Sea of Oman (Arabian Sea)
(Journal article; Peer reviewed, 2019)Seasonal dynamics of microzooplankton and changes in environmental condition were analysed during a one-year field sampling campaign in the Sea of Oman at two different stations. Monsoon winds in this region cause distinct ... -
Seasonal effects of hydropeaking on growth, energetics and movement of juvenile atlantic salmon (Salmo salar)
(Journal article; Peer reviewed, 2015)The performance and movements of juvenile Atlantic salmon Salmo salar exposed to variable water discharge (simulating hydropeaking) but with a stable water‐covered area were studied in six experimental stream channels, ... -
Seasonal Variability in the Zooplankton Community Structure in a Sub-Arctic Fjord as Revealed by Morphological and Molecular Approaches
(Peer reviewed; Journal article, 2021)Phyto- and zooplankton in Arctic and sub-Arctic seas show very strong seasonal changes in diversity and biomass. Here we document the seasonal variability in the mesozooplankton community structure in a sub-Arctic fjord ... -
Seasonal Variation in Genome-Wide DNA Methylation Patterns and the Onset of Seasonal Timing of Reproduction in Great Tits
(Journal article; Peer reviewed, 2019)In seasonal environments, timing of reproduction is a trait with important fitness consequences, but we know little about the molecular mechanisms that underlie the variation in this trait. Recently, several studies put ... -
Seasonal Variation in Site Fidelity of Moose (Alces alces)
(Master thesis, 2013)Species across many taxa display site fidelity, the tendency to return to previous used areas, particularly during important periods of life, such as at mating and reproduction. In general, it is expected that familiarity ... -
Seasonal Variations in Biofouling and Plankton Community Connected to a Large Scale Salmon Farm.
(Master thesis, 2011)Biofouling is the one of the main problems in marine finfish aquaculture. Biofouling occludes the nets and incurs major costs to fish farmers in the form of copper containing anti fouling paints used on the net surfaces, ... -
Seasonal Variations in Thyroid Disrupting Effects of Persistent Organic Pollutants in Polar Bears (Ursus maritimus) from Svalbard
(Master thesis, 2016)Several persistent organic pollutants (POPs) have the ability to interfere with the thyroid hormone (TH) system in arctic mammals. This endocrine system is crucial for adapting to a changing environment, and it is an ...