Department of Natural Sciences: Nye registreringer
Viser treff 41-60 av 408
-
Three decades of change in the Skagerrak coastal ecosystem, shaped by eutrophication and coastal darkening
(Peer reviewed; Journal article, 2023)Global coastal ecosystems are under accelerating pressure from human activities and climate change. In this study we explore a long-term time series (mostly 1990–2016) from major Norwegian rivers, together with coastal ... -
Combining modeling with novel field observations yields new insights into wintertime food limitation of larval fish
(Peer reviewed; Journal article, 2023)Recruitment success of marine fishes is generally considered to be highly dependent on larval growth and survival. In temperate ecosystems, fish larvae are sensitive to food limitation during the low productivity seasons, ... -
Marine primary producers in a darker future: a meta-analysis of light effects on pelagic and benthic autotrophs
(Peer reviewed; Journal article, 2023)The availability of underwater light, as primary energy source for all aquatic photoautotrophs, is (and will further be) altered by changing precipitation, water turbidity, mixing depth, and terrestrial input of chromophoric ... -
Haulout patterns of harbour seal (Phoca vitulina) colonies in the Norwegian Skagerrak, as monitored through time-lapse camera surveys
(Master thesis, 2023)Harbour seals (Phoca vitulina) are a part of the Norwegian coastal ecosystem and are distributed along the coastline, amongst the humans inhabiting and/or visiting these areas. We need to gain a better understanding of how ... -
A Global Perspective on Microplastic Concentrations and Characteristics in Sediment and Biota in Marine Coastal Areas
(Master thesis, 2023)Microplastic (MP, < 5 mm) has become an omnipresent environmental pollutant due to inappropriate management since the invention of plastic during the 1800s. MPs are now detected in all environmental matrices, with marine ... -
Gytetid hos laks (Salmo salar). - Skjer det en endring som følge av klimaendringer?
(Master thesis, 2023)Gytetid hos Atlanterhavslaks i norske vassdrag ble i 1988 studert av Tor G. Heggberget. Han fant at tiden laksen gyter på varierer fra midten av oktober til midten av januar, og at laksen gyter på gjennomsnittstemperaturer ... -
Fishing for Answers: A Historical Analysis of 150 Years of Fisheries landings in Skagerrak
(Master thesis, 2023)Norge blir ofte betraktet som et ledende eksempel på bærekraftig fiskeriforvaltning. Allikevel tilsier historien at det ikke alltid har vært slik, men skiftende referanserammer etter flere tiår med utvikling i fiskerinæringen, ... -
Designing a species-specific method, based on analysis of eDNA, for detection of lesser weever fish, and testing it at chosen locations along the coastline of Agder, Southern Norway
(Master thesis, 2023)Temperature is largely influencing species dispersion, and when the temperature conditions within an area are changing, species populations often respond by moving to other, more suitable areas. Such behavior has often ... -
Analyzing the reliability of citizen science information using Pacific oysters as a model system
(Master thesis, 2023)Det biologiske mangfolds krisen har ført til at mange arter har blitt utryddet de siste 20 årene; En av årsakene til dette er økende nærvær av fremmede arter. Mange av disse artene er uidentifiserte, noe som gjør det ... -
Behavioral reactions to H2S in farmed Salmon
(Master thesis, 2023)I resirkulerende akvakulturanlegg kan dannelse av hydrogensulfid (H2S) føre til akutt massedød av laks. Det er begrenset med kunnskap om hvordan fisk reagerer på H2S ved lave konsentrasjoner. Automatisk tolking av adferd ... -
Monitoring Attempted Eradication of the Invasive Species Northern Pike (Esox lucius), and Re-Establishment of Three-Spined Stickleback (Gasterosteus aculeatus) in Gillsvann, using eDNA Analysis.
(Master thesis, 2023)Anthropogenic activities are putting marine and freshwater ecosystems under increasing pressure and global climate change is causing transformations in ecosystems and food chains worldwide. Invasive species pose one of the ... -
Detection and Analysis of Microplastics in Boat Marina and Eelgrass Bed on the Southern Coast of Norway
(Master thesis, 2023)Microplastics are widely distributed around the world and are emerging as one of the most serious environmental problems worldwide. This study aimed to investigate the presence and sources of microplastics by human activities ... -
In deep water: Long-term trends in demersal fish diversity in Skagerrak and the Norwegian trench
(Master thesis, 2023)Throughout history, human activities have had profound impacts on marine ecosystems, with clear evidence of these consequences observable in the Skagerrak region. Oceans have historically been a critical resource for ... -
Recolonization and recovery of an Arctic benthic community subject to mine-tailings deposits
(Peer reviewed; Journal article, 2023) -
Time trends of heavy metals and PAHs in blue mussels (Mytilus edulis) and contamination of sediments in the Kristiansandfjord, Southern Norway
(Master thesis, 2023)The Kristiansandfjord in Southern Norway has been contaminated for several decades (Green et al., 1985; Berge et al., 2007; Øxnevad et al., 2021). In this study, contaminant concentration data from blue mussel and sediments ... -
The effect of removing a natural migration barrier on a previously isolated population of Brown trout (Salmon trutta L.) – Kvåsfossen, Norway.
(Master thesis, 2023)In the years of 1970s and 1980s acidic rain threatened coastal freshwater fish populations in European rivers. Several fish populations in western and southern Norway were particularly affected including the Norwegian brown ... -
Size selectivity of standardized lobster traps used in long-term monitoring and their ability to catch large European lobsters (Homarus gammarus).
(Master thesis, 2023)Harvesting the resources of the ocean has been an integral part of both human settlement and advancements for millennia. In later years, the effects of unsustainable harvesting have become clearer, and several management ... -
Prevalence of tick-borne encephalitis virus in questing Ixodes ricinus nymphs in southern Scandinavia and the possible influence of meteorological factors
(Peer reviewed; Journal article, 2023)Ixodes ricinus ticks are Scandinavia's main vector for tick-borne encephalitis virus (TBEV), which infects many people annually. The aims of the present study were (i) to obtain information on the TBEV prevalence in ... -
Leading edge erosion of wind turbine blades: Effects of blade surface curvature on rain droplet impingement kinematics
(Peer reviewed; Journal article, 2020)The issue of leading edge erosion (LEE) of wind turbine blades (WTBs) is a complex problem that reduces the aerodynamic efficiency of blades, and affects the overall cost of energy. Several research efforts are being made ... -
The interplay between terrestrial organic matter and benthic macrofauna: Framework, synthesis, and perspectives
(Peer reviewed; Journal article, 2023)Ecosystems are shaped by physical, chemical, and biological drivers, which affect the quality and quantity of basal energy sources, with impacts that cascade to higher trophic levels. In coastal, shelf, and marine habitats, ...