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norskNorges fiskerihøgskole: Nye registreringer
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Kiselalger som fôrkomponent i laksefôr. Biokjemisk sammensetning og fettsyreprofil hos atlantisk laks (Salmo salar L.) fôret med ulike lipid- og proteinkilder
(Master thesis; Mastergradsoppgave, 2020-05-15)Det økende behovet for marine ressurser som ingrediens i fôr har ført til et søk etter nye ressurser, da dagens ressurser ikke lengre er bærekraftig. For å øke utbytte er det foreslått å rette søket lengre ned i næringskjeden. Marine kiselalger er et eksempel på slike organismer. Disse er ikke godt utnyttet i dag, hovedsakelig på grunn av manglende kunnskap rundt teknologi, samt forskning på hvilke ... -
Ufordøyelig binder i fôr til laks - evaluering av velferd og tilvekst
(Master thesis; Mastergradsoppgave, 2021-05-18)Med stadig økning i produksjon av oppdrettslaks og et relativt lavt antall tilgjengelig vannkilder til smoltproduksjon, ser man økt bygging av RAS-anlegg. Ved rensing av produksjonsvannet er første vannbehandlingstrinn mekanisk filtrering etterfulgt av biofiltrering, rensesystemets flaskehals. Biofilteret renser vannet for nitrogenholdige molekyler (TAN), som er giftig for laks, og er sensitivt for ... -
The distribution of Eubothrium crassum (Cestoda: Pseudophyllidea) in brown trout, Salmo trutta, in allopatric and sympatric populations
(Master thesis; Mastergradsoppgave, 2021-05-17)Sticklebacks in particular have been suspected to have a role in transmission of E. crassum to its final host, the brown trout. In this study, prevalence and mean abundance of E. crassum in trout have been examined in allopatric and sympatric populations to address the suspected role of sticklebacks in the life cycle of E. crassum. 1106 trout from 22 lakes in the northern parts of Norway were ... -
Ordningen med utviklingstillatelser Et bidrag til innovasjon i norsk oppdrettsnæring
(Master thesis; Mastergradsoppgave, 2017-05-15)Norsk oppdrettsnæring har opplevd eventyrlig vekst. I løpet av en et halvt århundre har næringen utviklet seg fra omtrent ingenting til å bli blant våre viktigste og største eksportnæringer. Veksten har i stor grad skyltes oppdretternes kontinuerlige produktivitetsforbedringer, basert på forbedring av utstyr, avl og utvikling av vaksiner og fôr. Skal eventyret få fortsette er næringen avhengig av å ... -
Antimikrobielle forbindelser i kongsnegl (Buccinum undatum) og neptunsnegl (Neptunea despecta)
(Master thesis; Mastergradsoppgave, 2017-05-15)Det økende antall patogene bakteriestammer som utvikler resistens mot dagens kommersielle antibiotika er en av de største truslene mot den globale helsen i vår tid. Infeksjonssykdommer som tidligere kunne behandles med antibiotika har nå nesten blitt umulige å behandle, det er derfor et umiddelbart behov for nye typer antibiotika med nye virkningsmekanismer enn det som allerede eksisterer på markedet. ... -
Securidine analogues from the marine bryozoan Securiflustra securifrons.
(Master thesis; Mastergradsoppgave, 2021-05-12)Har isolert analoger av Securidine A, samt andre forbindelser fra arten Securiflustra securifrons, utført strukturoppklaring og testet for bioaktivitet. -
Oceanic plastic pollution caused by Danish seine fishing in Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-06)Wear and tear on fishing gear is a sparsely investigated source of microplastic pollution in the sea. In Norway, Danish seine ropes and trawls are the fishing gears that contribute most to this pollution. The main reason for this pollution is that the seine ropes are dragged along the seabed over a considerable distance, creating a friction force that results in high ropes wear. This note reports ... -
Growth performance, hepatic enzymes, and gut health status of common carp (Cyprinus carpio) in response to dietary Cetobacterium somerae fermentation product
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-15)Intensive aquaculture practices compromise the health of fish. Probiotics especially those isolated from aquatic animals play important roles in improving fish health. The aim of the study was to evaluate the effects of stabilized fermentation product of Cetobacterium somerae (XMX-1) on the growth performance, gut and liver health of common carp. A total of 300 carps (initial weight of 2.32 ± 0.02 ... -
Fish Skin and Gill Mucus: A Source of Metabolites for Non-Invasive Health Monitoring and Research
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-31)Mucous membranes such as the gill and skin mucosa in fish protect them against a multitude of environmental factors. At the same time, changes in the molecular composition of mucus may provide valuable information about the interaction of the fish with their environment, as well as their health and welfare. In this study, the metabolite profiles of the plasma, skin and gill mucus of freshwater ... -
Fishes in a changing world: learning from the past to promote sustainability of fish populations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-14)Populations of fishes provide valuable services for billions of people, but face diverse and interacting threats that jeopardize their sustainability. Human population growth and intensifying resource use for food, water, energy and goods are compromising fish populations through a variety of mechanisms, including overfishing, habitat degradation and declines in water quality. The important ... -
Effect of dietary components on the gut microbiota of aquatic animals. A never-ending story?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-07)It is well known that healthy gut microbiota is essential to promote host health and well-being. The intestinal microbiota of endothermic animals as well as fish are classified as autochthonous or indigenous, when they are able to colonize the host’s epithelial surface or are associated with the microvilli, or as allochthonous or transient (associated with digesta or are present in the lumen). ... -
RAT-RS: a reporting standard for improving the documentation of data use in agent-based modelling
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-30)This article describes and justifies a reporting standard to improve data use documentation in Agent-Based Modelling. Following the development of reporting standards for models themselves, empirical modelling has now developed to the point where these standards need to take equally effective account of data use (which previously has tended to be an afterthought to model description). It is ... -
The impact of fisheries management on fishers' health and safety: A case study from Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-18)Since the late 1980s, Norwegian fishers have been subjected to a cohesive regulatory regime aimed at sustainable resource management. Despite high occupational injury rates and exposure to several factors that may influence health negatively, regulation of occupational health and safety (OHS) came late in fishing compared with other industries. Fisheries management and safety management are not ... -
Aktuelle sykdomsutbrudd og diagnoser
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020)Aktuelle diagnoser, «nye» sykdommer og spesielle tilfeller har i mange år blitt presentert under vignetten «Aktuelle sykdomsutbrudd og diagnoser fra Veterinærinstituttet, Mattilsynet og NMBU Veterinærhøgskolen». Redaksjonen er av den oppfatning at dette er nyttig og lett tilgjengelig informasjon som bidrar til å opprettholde medlemmenes kunnskap om utviklingen innen diagnostikk og overvåkning av ... -
Bakteriell gjellebetennelse hos rognkjeks (Cyclopterus lumpus)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021)Veterinærinstituttet mottok i januar i år en innsendelse fra et settefiskanlegg for rognkjeks. Rognkjeksen var 10-13 gram og uvaksinert. Settefiskanlegget er et gjennomstrømningsanlegg med sjøvann. Det var mistanke om gjelleproblematikk da det ble rapportert om døde individer med utspilte gjellelokk og bleke gjeller. Ved Veterinærinstituttet ble det gjennomført histopatologiske og immunhistokjemiske ... -
Niche separation between two dominant crustacean predators in European estuarine soft-bottom habitats
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-05)Epibenthic predators in estuarine shallow soft-bottom environments are generally considered to have broad ecological niches with a wide overlap. This allows them to cope with abundant but highly variable prey communities. The assessment of trophic relationships in shallow soft-bottom habitats is, however, challenging and often complicated by the bias and low resolution of the analytical tools available ... -
Structural and functional analyses of Rubisco from arctic diatom species reveal unusual posttranslational modifications
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-20)The catalytic performance of the major CO<sub>2</sub>-assimilating enzyme, ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), restricts photosynthetic productivity. Natural diversity in the catalytic properties of Rubisco indicates possibilities for improvement. Oceanic phytoplankton contain some of the most efficient Rubisco enzymes, and diatoms in particular are responsible for a significant ... -
Ethical By Designer - How to Grow Ethical Designers of Artificial Intelligence
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-13)Ethical concerns regarding Artificial Intelligence (AI) technology have fueled discussions around the ethics training received by AI designers. We claim that training designers for ethical behaviour, understood as habitual application of ethical principles in any situation, can make a significant difference in the practice of research, development, and application of AI systems. Building on ... -
Mass Cultivation of Microalgae: I. Experiences with Vertical Column Airlift Photobioreactors, Diatoms and CO2 Sequestration
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-17)From 2015 to 2021, we optimized mass cultivation of diatoms in our own developed vertical column airlift photobioreactors using natural and artificial light (LEDs). The project took place at the ferrosilicon producer Finnfjord AS in North Norway as a joint venture with UiT—The Arctic University of Norway. Small (0.1–6–14 m<sup>3</sup>) reactors were used for initial experiments and to produce inoculum ... -
Effect of the T90-codend on the catch quality of cod (Gadus morhua) compared to the conventional codend configuration in the Barents Sea bottom trawl fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-18)The aim of this study was to compare the catch quality of Northeast Atlantic cod (Gadus morhua) in the Barents Sea bottom trawl fishery caught using the conventional configuration (a sorting grid followed by a diamond mesh (T0) codend) and a T90° turned mesh codend (T90) without a grid. Twenty hauls were conducted, consisting of 10 hauls with the conventional configuration and 10 hauls with the ...
