Now showing items 121-140 of 5353

    • Herbivore diversity effects on Arctic tundra ecosystems: a systematic review 

      Barbero-Palacios, Laura; Barrio, Isabel C.; García Criado, Mariana; Kater, Ilona; Petit Bon, Matteo; Kolari, Tiina H. M.; Bjørkås, Ragnhild; Trepel, Jonas; Lundgren, Erick; Björnsdóttir, Katrín; Hwang, Bernice C.; Bartra Cabre, Laura; Defourneaux, Mathilde; Ramsay, Jennifer; Lameris, Thomas K.; Leffler, A. Joshua; Lock, Janine G.; Kuoppamaa, Mari S.; Kristensen, Jeppe A.; Bjorkman, Anne D.; Myers-Smith, Isla; Lecomte, Nicolas; Axmacher, Jan C.; Den Herder, Michael; Pagneux, Emmanuel P.; Skarin, Anna; Sokolova, Natalia; Windirsch, Torben; Wheeler, Helen Claire; Serrano, Emmanuel; Virtanen, Tarmo; Hik, David S.; Kaarlejärvi, Elina; Speed, James David Mervyn; Soininen, Eeva M; Gilg, Olivier (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-25)
      Background Northern ecosystems are strongly influenced by herbivores that differ in their impacts on the eco‑ system. Yet the role of herbivore diversity in shaping the structure and functioning of tundra ecosystems has been overlooked. With climate and land-use changes causing rapid shifts in Arctic species assemblages, a better under‑ standing of the consequences of herbivore diversity changes for ...
    • Fortrinn bygd på tilgang til viktige fiskefelt 

      Nyborg, Emilie-Martine Torsvik (Master thesis; Mastergradsoppgave, 2024-06-17)
      Denne masteroppgaven undersøker hvordan norske fiskeres konkurransefortrinn påvirkes når de mister tilgang til viktige fiskefelt. Hensikten er å utforske hvordan internasjonale politiske endringer påvirker fiskerienes strategi og effekten av dette. Studien undersøker derfor endringer i lønnsomheten til fiskeriene ved å analysere endringer i fangstkostnader og fangstverdi knyttet til ressursen før ...
    • Effects of diet and the vgll3 locus on male maturation and sperm traits of Atlantic salmon 

      Larsen, Regine Amanda (Master thesis; Mastergradsoppgave, 2024-06-17)
      A challenge in Norwegian Atlantic salmon (Salmo salar) aquaculture is unwanted early maturation in male fish. Environmental factors such as diet and genetic factors such as the vgll3 locus, are key mediators of male maturation and reproduction. In this study, different feeding treatments, alongside the vgll3 locus, was analyzed to assess their influence on maturation and sperm traits on four-year ...
    • Secondary Metabolites from Marine Invertebrate Extracts 

      Eiken, Brede Bjerke (Master thesis; Mastergradsoppgave, 2024-05-15)
      In drug discovery, natural organisms offer a rich source of bioactive compounds, with over one-third of drugs originating from natural sources. Bioprospecting is the field of systematically screening organisms to discover and isolate novel compounds for drug development or other applications. With the shifting trends of examining the biodiversity of the marine environment, have marine bioprospecting ...
    • Preferanser for norsk torsk hos vietnamesiske forbrukere 

      Stefanussen, Fredrik (Master thesis; Mastergradsoppgave, 2024-05-15)
      Formålet med denne studien er å identifisere muligheter og barrierer for norsk torsk i Vietnam, med hensyn til forbrukernes preferanser. Studien har benyttet seg av kvalitativ metode, der data har blitt samlet inn gjennom fokusgrupper med informanter fra Vietnam. Informantene har erfaring fra arbeid innenfor 4-5 stjerners hoteller og restauranter. Fokusgruppene ble gjennomført i byen Nha Trang, 22. ...
    • Unravelling population genetic structure of Arctogadus glacialis in Northeast Greenland with whole genome sequencing 

      Koch, Rasmus Kjær (Master thesis; Mastergradsoppgave, 2024-05-15)
      With rapidly increasing temperatures, reducing ice cover and lower albedo, the physico-chemical conditions in the Arctic fluctuate more than any other place on the planet, especially in the light of the current climate change. This has a severe effect on e.g. Arctic marine eco- systems, which make marine species good indicators, as they are in close contact with environmental gradients. One of which ...
    • An Antiherpesviral Host-Directed Strategy Based on CDK7 Covalently Binding Drugs: Target-Selective, Picomolar-Dose, Cross-Virus Reactivity 

      Yu, DongHoon; Wagner, Sabrina; Schütz, Martin; Jeon, Yeejin; Seo, Mooyoung; Kim, Jaeseung; Brückner, Nadine; Kicuntod, Jintawee; Tillmanns, Julia; Wangen, Christina; Hahn, Friedrich; Kaufer, Benedikt B.; Neipel, Frank; Eickhoff, Jan; Klebl, Bert; Nam, Kiyean; Marschall, Manfred (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-23)
      he repertoire of currently available antiviral drugs spans therapeutic applications against a number of important human pathogens distributed worldwide. These include cases of the pandemic severe acute respiratory coronavirus type 2 (SARS-CoV-2 or COVID-19), human immunodeficiency virus type 1 (HIV-1 or AIDS), and the pregnancy- and posttransplant-relevant human cytomegalovirus (HCMV). In almost ...
    • Use of Algae in Aquaculture: A Review 

      Vijayaram, Srirengaraj; Ringø, Einar; Ghafarifarsani, Hamed; Hoseinifar, Seyed Hossein; Ahani, Saman; Chou, Chi-Chung (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-01)
      The utilization of algae in aquaculture is environmentally friendly, safe, and cost-effective and can effectively substitute for fish meal and fish oil in aquatic feeds. Incorporating algae as dietary supplements leads to significant enhancements in aquatic animals’ health and also improves the aquatic ecosystem. Algae are rich sources of nutrients and serve as the foundational food source in ...
    • Changing species dominance patterns of Boreal-Arctic heathlands: evidence of biotic homogenization 

      Bråthen, Kari Anne; Tuomi, Maria Wilhelmina; Kapfer, Jutta; Böhner, Hanna; Maliniemi, Tuija (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-29)
      Heathlands are extensive systems often dominated by slow-growing and long-lived woody plants. These systems require longer-term studies to capture if and how they are changing over time. In 2020, we resurveyed species richness and cover of vascular plant communities in 139 heathlands along the coastline of northern Fennoscandia, first surveyed during 1965–1975. The first survey included six ...
    • Replacing fishmeal with salmon hydrolysate reduces the expression of intestinal inflammatory markers and modulates the gut microbiota in Atlantic salmon (Salmo salar) 

      Sandbakken, Ingrid Schafroth; Su, Hang; Johansen, Louise; Zhang, Yupeng; Ringø, Einar; Røsbak, Randi; Yakovlev, Igor; Five, Kathrine Kjos; Olsen, Rolf-Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-22)
      The feed legislation allows the use of fish protein hydrolysates in feed for the same species in which it came from, since enzymatic hydrolysis degrades the proteins and eliminates potential prions, which have caused disease in mammals, but not in fish. In this trial, we investigated the effects of partially replacing dietary fishmeal (FM) with salmon protein hydrolysate (FPH) on the intestinal gene ...
    • Comparing the size selectivity and exploitation patterns of two T0 codends with T90 codends in demersal trawl fishery targeting white croaker (Pennahia argentata) of the northern South China Sea 

      Yang, Bingzhong; Herrmann, Bent; Wan, Rong (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-28)
      The size selectivity and exploitation patterns of two T0 (diamond mesh) codends were tested and compared with T90 (diamond mesh turned by 90◦) codends in demersal trawl fishery targeting white croaker (Pennahia argentata) of the northern South China Sea. The four experimental codends involved two mesh sizes, 30 and 35 mm, respectively. The size selectivity of the T0 codend with mesh size of ...
    • Camera traps reveal seasonal variation in activity and occupancy of the Alpine mountain hare Lepus timidus varronis 

      Bison, Marjorie; Yoccoz, Nigel Gilles; Carlson, Bradley Z.; Bayle, Arthur; Delestrade, Anne (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-01)
      Mountain hare is a cold-adapted species threatened by climate change, but despite its emblematic nature, our understanding of the causes of population decline remains limited. Camera traps are increasingly used in ecology as a tool for monitoring animal populations at large spatial and temporal scales. In mountain environments where field work is constrained by difficult access and harsh ...
    • Clustering asset markets based on volatility connectedness to political news 

      Abdollahi, Hooman; Junttila, Juha-Pekka; Lehkonen, Heikki (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-13)
      To assess similarities in international asset markets’ responses to political news, we construct a political news index using advanced natural language processing. We then examine how the volatility across international asset markets is connected to the development of our political news index by measuring the daily directional connectedness using a VAR-based framework. Finally, we apply an ...
    • Taxonomic and functional-trait metrics track recovery of demersal fish and shrimp communities following system collapse 

      Wiedmann, Magnus Aune; Ramasco, Virginie; Wells, Nadine; Warren, Margaret; Cyr, Frédéric; Pedersen, Eric J.; Koen-Alonso, Mariano; Eriksen, Elena; Primicerio, Raul; Lindstrøm, Ulf Ove; Renaud, Paul Eric (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-11)
      Monitoring programs that integrate both structural and functional ecosystem components play integral roles in ecosystem management and conservation planning. In the early 1990’s, the marine ecosystem of the waters surrounding Newfoundland and Labrador (NL) underwent a regime shift. Several demersal and pelagic fish stocks collapsed simultaneously, and this had significant ecological and socioeconomic ...
    • Exploring the potential of extreme citizen science with Danish high school students using environmental DNA for marine monitoring 

      Leerhøi, Frederik; Rytter, Maria; Lillemark, Marie Rathcke; Randeris, Brian; Rix, Christian; Olesen, Jørgen; Olsen, Morten Tange; Møller, Peter Daniel Rask; Lundholm, Nina; Knudsen, Steen Wilhelm; Tøttrup, Anders P. (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-05)
      Background This study aims to assess the efficacy and safety of Qingpeng ointment (QPO), a Tibetan medicine for alleviating symptoms in individuals with acute gouty arthritis (AGA). Methods This study was a randomized, double-blind, placebo-controlled trial that involved individuals with AGA whose joint pain, as measured on a visual analog scale (VAS) from 0 to 10, was equal to or greater than ...
    • Brute force prey metabarcoding to explore the diets of small invertebrates 

      Flo, Snorre; Vader, Anna; Præbel, Kim (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-06)
      Prey metabarcoding has become a popular tool in molecular ecology for resolving trophic interactions at high resolution, from various sample types and animals. To date, most predator–prey studies of small-sized animals (<1 mm) have met the problem of overabundant predator DNA in dietary samples by adding blocking primers/ peptide nucleic acids. These primers aim to limit the PCR amplification ...
    • Effects of the dark triad on word of mouth in the luxury context: the moderating role of opinion divergence 

      Wien, Anders Hauge; Peluso, Alessandro; Pichierri, Marco; Piper, Luigi; Guido, Gianluigi (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-12)
      The study examines the effects of the dark triad traits (i.e., psychopathy, narcissism, and Machiavellianism) on positive word-of-mouth (WOM) intention for luxury products, and the moderating role of others’ opinion divergence (i.e., whether or not a consumer’s opinion deviates from that of the reference group). An experiment with 208 respondents tested the research hypotheses, shedding light on the ...
    • Norsk torsk krysser Atlanteren 

      Ringfoss, Odd Arne (Master thesis; Mastergradsoppgave, 2024-06-12)
      Denne masteroppgaven omfatter en analyse av interne og eksterne faktorer som kan påvirke beslutninger knyttet til eksport av norsk torsk til USA. Gjennom en SWOT-analyse vurderes styrker, svakheter, muligheter og trusler for to grupper: importører og eksportører. For å adressere problemstillingen brukes VRIO- og PESTEL-rammeverkene til å identifisere og analysere interne og eksterne faktorer som ...
    • Varighet av immunresponser mot bakterieantigener hos vaksinert atlantisk laks i sjø – et feltstudie 

      Eikrem, Kristine (Master thesis; Mastergradsoppgave, 2024-05-25)
      Oppdrett av atlantisk laks er en stor næring i Norge i dag, men opplever problematikk med blant annet sykdom. Det arbeides med å utvikle gode og effektive vaksiner for å forhindre alvorlige sykdomsproblemer og opprettholde god fiskevelferd. For å kunne bidra til videre vekst i næringen er det derfor viktig å få en god forståelse for immunsystemet til fisk og undersøke vaksineresponser for å utvikle ...
    • Effekt av ulike temperaturregimer på hjerteutvikling hos Atlantisk laks (Salmo salar L.) i resirkuleringsanlegg (RAS) 

      Jacobsen, Camilla (Master thesis; Mastergradsoppgave, 2024-05-22)
      Økt dødelig i oppdrettsnæringen ansees som et betydelig problem både for omdømme, økonomi og mest av alt for fiskevelferden. Det spekuleres i om nedsatt smoltkvalitet grunnet intensiv drift i settefiskfasen kan være en medvirkende årsak til den økende dødeligheten. Oppdrett av settefisk i RAS kommer med en rekke fordeler, men det er lite studert hvilken påvirkning ulike miljøfaktorer i RAS har for ...