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norskFakultet for biovitenskap, fiskeri og økonomi
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Quality parameters and storage stability of the Norwegian red sea cucumber (Parastichopus tremulus)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-01-03)Quality parameters and storage stability were evaluated through biochemical, textural, and microbial analyses of the Norwegian red sea cucumber Parastichopus tremulus at two different storage temperatures (0 °C and 4 °C) over 17 days. During storage, the pH decreased from 7 to 6.3, the texture became softer decreasing from 47.3 to 0.3 N, while K-value increased from 4 to 52 %, microbial counts ... -
Seroprevalence and risk factors of brucellosis in pastoralists and their livestock in Central Equatoria State, South Sudan
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-19)Background Brucellosis poses serious public health implications and substantial economic losses in pastoral rural settings in South Sudan. In humans, brucellosis is almost always originating from animals. Current literature provides scant data regarding the seroprevalence of brucellosis in South Sudan. This cross-sectional study investigates the seroprevalence of brucellosis among the pastoral ... -
Eksamen og vurdering 24 - Sluttrapport fra arbeidsgruppe ved NTNU
(Research report; Forskningsrapport, 2024-12-03) -
Contrasting two major Arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the Laptev and Beaufort seas
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-17)The diel vertical migration (DVM) of zooplankton is one of the largest species migrations to occur globally and is a key driver of regional ecosystems and the marine carbon pump. Previously thought to be hampered by the extreme light regime prevailing in the Arctic Ocean, observations have revealed that DVM does occur in ice-covered Arctic waters and suggest the decline in Arctic sea ice may thereby ... -
Seasonal changes in the feeding aggregation structure of male sperm whales (Physeter macrocephalus) in Northern Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-25)The sperm whale (Physeter macrocephalus) is one of the most widely distributed cetaceans. Adult males commonly occupy high latitudes, whereas females and juveniles occupy lower latitudes. In Northern Norway, previous studies focused on the summer period limiting our understanding of the seasonal dynamics of male foraging aggregations. We used year-round capture–mark–recapture data based on photo ... -
Differential regulation of magnesium transporters Slc41, Cnnm and Trpm6-7 in the kidney of salmonids may represent evolutionary adaptations to high salinity environments
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-29)Magnesium is important for enzymatic reactions and physiological functions, and its intracellular concentration is tightly regulated. Atlantic salmon has the ability to handle large changes in environmental Mg<sup>2+</sup> concentration when migrating between freshwater and seawater habitats, making it a relevant model to investigate Mg<sup>2+</sup> homeostasis. Parr-smolt transformation (PST) is ... -
Price transmission and asymmetry in a changing seafood supply chain
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-01-08)This study investigates price transmission and asymmetry in the cod value chain between the export market of Norway and the retail market of Portugal. Using monthly data from January 2011 to December 2022, it analyzes the value chains of salted dried cod, salted wet cod, and the relationship between the export price of salted wet cod and the retail price of salted dried cod using a non-linear ARDL ... -
Takvatnprosjektet – vellykket samarbeid mellom forskere og fiskeentusiaster
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)Overbefolka fiskebestander er et stort problem i mange innsjøer, særlig for røye, ørret, abbor og sik. Kjennetegnet er småvokst og mager fisk, gjerne med høy infeksjon av parasitter. Som et potensielt botemiddel ble et storstilt uttynningsfiske med teiner iverksatt i Takvatn (15 km2), Troms, på 1980-tallet. I nært samarbeid mellom forskere, grunneiere og fiskere ble 700.000 smårøye (31.3 tonn) tatt ... -
Extreme mismatch between phytoplankton and grazers during Arctic spring blooms and consequences for the pelagic food-web
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-13)Food-web structure determines the cycling pathways and fate of new production in marine ecosystems. Herbivorous zooplankton populations are usually seasonally coupled with pelagic primary producers. Synchrony of phytoplankton blooms with reproduction, recruitment and seasonal ascent of their main grazers ensures efficient transfer of organic carbon to higher trophic levels, including commercially ... -
One organ to infect them all: the Cuscuta haustorium
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-02)Background - Research on the parasitic plant genus Cuscuta has flourished since the genomes of several of its species were published. Most of the research revolves around the iconic infection organ that secures the parasite’s sustenance: the haustorium. Interest in understanding the structure–function–regulation relationship of the haustorium is based as much on the wish to find ways to keep the ... -
Macroecological patterns of rodent population dynamics shaped by bioclimatic gradients
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-27)Long-term studies of cyclic rodent populations have contributed fundamentally to the development of population ecology. Pioneering rodent studies have shown macroecological patterns of population dynamics in relation to latitude and have inspired similar studies in several other taxa. Nevertheless, such studies have not been able to disentangle the role of different environmental variables in shaping ... -
Public entrepreneurial opportunities: How institutional logics shape public servants' opportunity evaluation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-26)Which entrepreneurial opportunities do public servants find appealing, and what influences their evaluation? Our investigation of 14 Norwegian municipal entrepreneurial projects indicates that public servants positively assess the attractiveness of welfare, economic, and participatory opportunities. Their evaluations are shaped by public sector logics. Our contribution is twofold: first, we connect ... -
Quantifying the Detection Sensitivity and Precision of qPCR and ddPCR Mechanisms for eDNA Samples
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-11)Environmental DNA (eDNA) detection employing quantitative PCR (qPCR) and droplet digital PCR (ddPCR) offers a non-invasive and efficient approach for monitoring aquatic organisms. Accurate and sensitive quantification of eDNA is crucial for tracking rare and invasive species and understanding the biodiversity abundance and distribution of aquatic organisms. This study compares the sensitivity and ... -
Goose grubbing and warming suppress summer net ecosystem CO2 uptake differentially across high-Arctic tundra habitats
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-09)Environmental changes, such as climate warming and higher herbivory pressure, are altering the carbon balance of Arctic ecosystems; yet, how these drivers modify the carbon balance among different habitats remains uncertain. This hampers our ability to predict changes in the carbon sink strength of tundra ecosystems. We investigated how spring goose grubbing and summer warming—two key environmental-change ... -
The relationship between personal values and preference for novelty: conceptual issues and the novelty–familiarity continuum
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-20)The search for novelty when going on vacation is a prominent theme in the literature. Still, empirical research exploring the antecedents of this preference is limited. This study investigates the impact of two opposing personal value dimensions – openness to change and conservation – on individuals’ preference for novelty and familiarity. Data was assembled from a representative sample of 493 UK ... -
Biopolymer encapsulation for improved probiotic delivery: Advancements and challenges
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-15)Probiotics, known for their health benefits as living microorganisms, hold significant importance across various fields, including agriculture, aquaculture, nutraceuticals, and pharmaceuticals. Optimal delivery and storage of probiotic cells are essential to maximize their effectiveness. Biopolymers, derived from living sources, plants, animals, and microbes, offer a natural solution to enhance ... -
Investment and endogenous efficiency in a contest
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-01-01)Contests are ubiquitous but do not happen in a vacuum. Rivals can prepare themselves for the contest to improve their ultimate chance of victory. Two contestants with different prize values play an all-pay auction and can invest to improve the efficiency of their own effort in the contest. We show that at most one player will invest, and that two asymmetric pure-strategy equilibria exist depending ... -
Hydrochemical characterization and sustainability assessment of Ismailia canal water, Eastern Nile Delta, Egypt: implications for human health and environmental safety
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-11)Surface freshwater systems globally face severe stresses due to overpopulation and associated waste. The Ismailia Canal, a crucial freshwater source in the eastern Nile Delta, Egypt, serves multiple purposes and is endangered by various environmental activities. This study characterizes the canal’s water using physicochemical parameters to evaluate its suitability for different uses. Water samples ... -
Transcriptomic profiling of gill biopsies to define predictive markers for seawater survival in farmed Atlantic salmon
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-16)Wild Atlantic salmon migrate to sea following completion of a developmental process known as parr-smolt transformation (PST), which establishes a seawater (SW) tolerant phenotype. Effective imitation of this aspect of anadromous life history is a crucial aspect of commercial salmon production, with current industry practice being marred by significant losses during transition from the freshwater ... -
Social acceptance for salmon produced in new production systems - Report on willingness to pay for new production systems and social acceptance of salmon farming in general
(Research report; Forskningsrapport, 2024)This report summarizes the findings from a price experiment survey on the willingness to pay (WTP) for salmon produced using new production systems in salmon farming in three countries (Norway, Canada and Scotland). This includes land-based, floating closed containment cages and offshore production systems. The results revealed that consumers preferred salmon produced using conventional (traditional) ...
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