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Evaluation of open- and closed-eyed entrances on retention and escape of invasive swimming crabs and associated fauna from pots in their native range
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-29)Fishing trials targeting several invasive swimming crab species in their native habitat were undertaken using two types of collapsible pot, one with open-eyed entrances and the other with closed-eyed entrances, to analyse differences in catch retention between them. The open-eyed pot was dome-shaped with two funnel entrances located at opposite ends, whereas the closed-eyed pot had two soft sleeves ... -
The role of marine mammals in the Barents Sea foodweb
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-26)Marine mammals are important players in the Barents Sea ecosystem but their structural role in the foodweb has been little explored. We compare foodweb-related characteristics within and between phylogenetic groups for 19 marine mammals. As a group, they directly connect to the most central species (i.e cod and haddock) in the Barents Sea (i.e. cod and haddock) and consume over half of the available ... -
Genetic population structure and variation at phenology‐related loci in anadromous Arctic char (Salvelinus alpinus)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-03)The Arctic will be especially affected by climate change, resulting in altered seasonal timing. Anadromous Arctic char (<i>Salvelinus alpinus</i>) is strongly influenced by sea surface temperature (SST) delimiting time periods available for foraging in the sea. Recent studies of salmonid species have shown variation at phenology‐related loci associated with timing of migration and spawning. We ... -
Arctic Circular Seafood Synergies: Beyond the Bottom Line. Perspectives on Full Utilization & Local Processing in Alaska & Norway
(Master thesis; Mastergradsoppgave, 2019-11-16)Alaskan wild salmon and Norwegian farmed salmon represent the largest share of their respective global harvests of salmon by volume, yet both are exporting the majority of their harvests and byproducts for processing and are thereby missing out the potential to create local circular production systems for more environmentally sustainable processing . Alaskan salmon and Norwegian aquaculture have an ... -
Labour in fisheries: Task analysis of fishing operations on a Norwegian trawler
(Master thesis; Mastergradsoppgave, 2019-11-15)This study investigates the labour on a Norwegian trawler through the study of tasks that are performed under the trawling operation. Study of tasks is one of the fundamental approaches to studying labour, and in this thesis, it is carried out using the technique of Hierarchical Task Analysis. This task analysis technique has been broadly and universally used in different industries for over 60 ... -
CO2 i sjø og på land. En lokal studie med fokus på fabrikkrøyk og miljø.
(Master thesis; Mastergradsoppgave, 2019-11-15)Netto utslipp av karbon til atmosfæren har økt siden starten på den industrielle revolusjon. Rundt halvparten av karbon som slippes ut blir tatt opp av havet fysisk via karbon fluks eller bundet opp i økosystemer i havet eller på land. Denne oppgaven tolker og diskuterer potensielle lokale virkninger av industriell CO2 utslipp ved å benytte fysiske og biologiske, oseanografi og CO2 data samlet ... -
The Effect of Climate Change on the Productivity and Profitability of Cod in the Barents Sea
(Master thesis; Mastergradsoppgave, 2019-08-22)Climate change has an inevitable natural impact on fisheries. Continually, several models made of both biological and economic factors are used to measure the effects of climate change on fish stocks. This study has as its objective to identify how climate change effect through carrying capacity affects the productivity and profitability of the cod stock in the Barents Sea. Two scenarios one with ... -
Biokjemiske egenskaper og kitininnhold i skallfraksjoner fra bioraffinering av raudåte (Calanus finmarchicus)
(Master thesis; Mastergradsoppgave, 2019-05-15)Høsting fra lavere trofiske nivå etter underutnyttede arter, som raudåte (Calanus finmarchicus), er foreslått som tiltak for mer bærekraftig utnyttelse av marine ressurser. Raudåte inneholder viktige næringsstoffer som lipider, proteiner og kitin. Bedriften Calanus AS høster og prosesserer raudåte og utvikler raffineringstrinn for en skallfraksjon. Hensikten med oppgaven var å karakterisere biokjemisk ... -
Skeletal anomalies and shape variation in diploid and triploid Atlantic salmon (Salmo salar L.) fed different diets
(Master thesis; Mastergradsoppgave, 2018-11-12)Usage of triploid Atlantic salmon (Salmo salar L.) have been of interest for salmon farmers to mitigate interbreeding between farmed and wild population, and to prevent early sexual maturation. Triploids tend to be more prone to develop skeletal deformities than diploids. This may result from inadequate rearing temperatures and/or diet formulation (i.e. low dietary phosphorus). The main objective ... -
Structure dependent determination of organophosphate targets in mammalian tissues using activity-based protein profiling
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-24)Acute and chronic exposure to organophosphates (OPs), including agricultural pesticides, industrial chemicals, and chemical warfare agents, remain a significant worldwide health risk. The mechanisms by which OPs alter development and cognition in exposed individuals remain poorly understood, in part due to the large number of structurally diverse OPs and the wide range of affected proteins and ... -
T-box transcription factor eomesodermin/Tbr2 in Atlantic cod (Gadus morhua L.): Molecular characterization, promoter structure and function analysis
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-11)Eomesodermin (Eomes) is a member of T-box transcription factor family and plays an important role in the regulation of a wide variety of developmental processes and immune response in animals. Here we report cloning and characterization of the full-length cDNA of Atlantic cod Eomes (GmEomes), which possesses a TBOX_3 domain similar to its counterpart in mammals. The regulated expression was observed ... -
Cultivable marine fungi from the Arctic Archipelago of Svalbard and their antibacterial activity
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-27)During a research cruise in 2016, we isolated fungi from sediments, seawater, driftwood, fruiting bodies, and macroalgae using three different media to assess species richness and potential bioactivity of cultivable marine fungi in the High Arctic region. Ten stations from the Svalbard archipelago (73–80 °N, 18–31 °E) were investigated and 33 fungal isolates were obtained. These grouped into 22 ... -
Coastal habitats and their importance for the diversity of benthic communities: A species- and trait-based approach
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-26)Coastal habitats are used by a great variety of organisms during some or all stages of their life cycle. When assessing the link between biological communities and their environment, most studies focus on environmental gradients, whereas the comparison between multiple habitats is rarely considered. Consequently, trait-based aspects of biodiversity in and between habitats have received little ... -
Dietary inclusion of Orange peels derived pectin and Lactobacillus plantarum for Nile tilapia (Oreochromis niloticus) cultured under indoor biofloc systems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-05-04)A 12-week feeding trial was carried out to investigate possible effects of dietary orange peels derived pectin (OPDP) and <i>Lactobacillus plantarum</i> CR1T5 (LP) singularly or combined on innate immune response, disease resistance, and growth performance of Nile tilapia fingerlings under indoor biofloc system. The fingerlings were fed the following diets: diet 1 (0 g kg<sup>−1</sup> OPDP and ... -
Is the Sri Lankan ecotourism industry threatened by climate change? A case study of Rekawa coastal wetland using contingent visitation approach
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-02)This study investigates intended visitation behavior of tourists toward Rekawa wetland under anticipated climate change (CC) scenarios. An interview-based contingent visitation survey was conducted with 365 foreign and domestic tourists to estimate the effects of CC on future visitation. Based on two IPCC scenarios using two direct and three indirect climatic factors, we composed a CC environmental ... -
Polygenic selection drives the evolution of convergent transcriptomic landscapes across continents within a Nearctic sister species complex
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-03)In contrast to the plethora of studies focusing on the genomic basis of adaptive phenotypic divergence, the role of gene expression during speciation has been much less investigated and consequently less understood. Yet, the convergence of differential gene expression patterns between closely related species‐pairs might reflect the role of natural selection during the process of ecological speciation. ... -
Thermal injuries in Atlantic salmon in a pilot Laboratory trial
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-27)Thermal delousing is a new method for removing sea lice from farmed Atlantic salmon (<i>Salmo salar</i> L). We investigated thermally-related tissue injuries in Atlantic salmon in a pilot laboratory trial to describe the acute effect of high water temperatures (34–38 °C). Acute tissue injuries in gills, eyes, brain and possible also nasal cavity and thymus were seen in salmon exposed to water ... -
Tourism in Marine Protected Areas: A view from Nha Trang Bay, Vietnam
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-25)Tourism development is considered a key accompanying strategy in creating alternative livelihood options for the communities living in and adjacent to the Marine Protected Areas. This paper examines the socioeconomic characteristics of the Nha Trang Bay protected area to determine the factors that influence the decision to participate in tourism sectors, and analyse whether these decisions would ... -
Data Envelopment Analysis for Analyzing Technical Efficiency in Aquaculture: The bootstrap methods
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-14)The paper adopts the bootstrap procedures for data envelopment analysis to analyze the technical efficiency in the Vietnam’s intensive white-leg shrimp farming. The results demonstrate that the null hypothesis of constant returns-to-scale is rejected in favor of variable returns-to-scale for the production technology. Moreover, the potential improvement is greater using bootstrapping than that ... -
Towards an Iberian DNA barcode reference library of freshwater macroinvertebrates and fishes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020)Freshwater macroinvertebrates and fishes are focal groups in major ecosystem biomonitoring programs in the Iberian Peninsula. Yet, their use as bioindicators is sometimes constrained by the time and cost needed for sorting macroinvertebrates specimens and their challenging taxonomic identification, and the huge sampling procedures for capturing rare or incipient fish species, respectively. Given the ...
