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norskBrowsing Artikler, rapporter og annet (Norges fiskerihøgskole) by Title
Now showing items 333-352 of 928
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Farvel til fiskeren? Om frafall og rekruttering til fiske
(Chapter; Bokkapittel, 2013)Parallelt med tiltagende lukking av de store fiskeriene i Norge, har det skjedd en nedgang i antall fiskere, samtidig som også færre rekrutteres til fiske. Spørsmålet her er om fiskere har blitt skjøvet ut av yrket eller om de har sluttet av andre grunner? En undersøkelse blant fiskere som har sluttet, tyder på at utviklinga i andre næringer og i samfunnet har hatt innvirkning på sysselsettingssystemet ... -
Fasting and its implications for fish welfare in Atlantic salmon aquaculture
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-20)Periods of fasting occur for a multitude of reasons in Atlantic salmon aquaculture. Feed withdrawal is widely used prior to transport, parasite treatments, preslaughter and for depuration purposes in recirculating aquaculture systems. Voluntary fasting is a coping response when fish have poor health or are exposed to poor farm environments. Owing to increased attention to animal welfare in aquaculture, ... -
The fate of conventional and potentially degradable gillnets in a seawater-sediment system
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-20)Abandoned gillnets in the marine environment represent a global environmental risk due to the ghost fishing caused by the nets. Degradation of conventional nylon gillnets was compared to that of nets made of poly- butylene succinate co-adipate-co-terephthalate (PBSAT) that are designed to degrade more readily in the envi- ronment. Gillnet filaments were incubated in microcosms of natural seawater ... -
Fatty Acid Composition of the Lipids from Atlantic Salmon—Comparison of Two Extraction Methods without Halogenated Solvents
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-01)The scope of this paper was to apply two recently developed methods for lipid extraction: the methyl tert-butyl ether (MTBE) method and the BUME method. These two methods do not include halogenated solvents, which makes them less hazardous to the environment, less toxic, and needed in less volume compared to the standard methods for lipid extraction. Fatty acid composition of the lipids from Atlantic ... -
Fatty acid profile of cooked leg meat and raw hepatopancreas of red king crab (Paralithodes camtschaticus) during three-month live holding without feeding at 5 and 10 °C
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-06)The red king crab (RKC, Paralithodes camtschaticus) is a highly-valued decapod species. Typically, RKCs undergo a period of live holding (LH), often without feeding, in onshore facilities, allowing for flexible management before export to destination markets. This study aimed to (i) gain information on the fatty acid (FA) profile of the cooked leg meat and raw hepatopancreas obtained from RKC harvested ... -
Feeding ecology of piscivorous brown trout (Salmo trutta L.) in a subarctic watercourse
(Journal article; Tidsskriftartikkel; Peer reviewed, 2004-02)Feeding ecology of piscivorous brown trout was studied in the Pasvik watercourse, Norway and Russia. The watercourse is heavily regulated for hydroelectric purposes, and 5000 brown trout > 25 cm are stocked annually to compensate the negative impacts of the impoundments. Stocked and wild trout had almost identical diets consisting mainly of vendace Coregonus albula and partly of whitefish Coregonus ... -
Field demonstration of a novel towed, area bubble-plume zooplankton (Calanus sp.) harvesting approach
(Research report; Forskningsrapport, 2010)This paper presents field experiment results of using a new technology to harvest copepods (Calanus sp.) in the ocean by bubble upwelling. Two largo-scale bubble rafts, a 21 m2 and a flexible 75 m2 bubble raft with tow parallel and perpendicular sparger elements, respectively, were field tested in areas with high, upper 25-m water column Calanus densities. Measured bubble-driven upwelling velocities ... -
Field sampling marine plankton for biodiscovery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-20)Microalgae and plankton can be a rich source of bioactivity. However, induction of secondary metabolite production in lab conditions can be difficult. One simple way of bypassing this issue is to collect biomass in the field and screen for bioactivity. Therefore, bulk net samples from three areas along the coast of northern Norway and Spitsbergen were collected, extracted and fractionated. ... -
Fine-scale differences in eukaryotic communities inside and outside salmon aquaculture cages revealed by eDNA metabarcoding
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-26)Aquaculture impacts on marine benthic ecosystems are widely recognized and monitored. However, little is known about the community changes occurring in the water masses surrounding aquaculture sites. In the present study, we studied the eukaryotic communities inside and outside salmonid aquaculture cages through time to assess the community changes in the neighbouring waters of the farm. Water ... -
Fine-Tuning Climate Resilience in Marine Socio-Ecological Systems: The Need for Accurate Space-Time Representativeness to Identify Relevant Consequences and Responses
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-18)Climate change triggers a wide mosaic of regional and local responses, often different to the large-scale variability in magnitude and direction. Because of the psychological connections (cognitive and emotional) with the frequency, intensity and age of a climatic event, people may have the capacity to recognize key variations at lower scales, especially those from which they perceive risk. Yet, the ... -
FINNFJORD INDRE, 3`dje PRØVETAKING AV SEDIMENT VÅR og HØST 2017
(Research report; Forskningsrapport, 2018)Denne miljøundersøkelsen er den tredje etter at Miljødirektoratet i 2014 påla Finnfjord as å utarbeide et program for vannovervåking, og gjennomføre dette i vannforekomsten Finnfjord Indre. Første rapport ble sendt inn 29 februar 2016, og i en tilbakemelding fra Miljødirektoratet i brev datert 4 april 2016 ble det varslet om behov for en ny undersøkelse for å kartlegge omfang og spredning av ... -
First observation of seasonal variations in the meat and co-products of the snow crab (Chionoecetes opilio) in the Barents Sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-24)The snow crab (<i>Chionoecetes opilio</i>), SC, is a newly established species in the Barents Sea. The snow crab fishery has established itself as a new and profitable industry in Norway in the last decade. The fishery started as a year-round fishery, without any information of possible seasonal variations in the quality of the product. In 2017 a total allowable catch was established by the Norwegian ... -
First record of experimentally induced salmon gill poxvirus disease (SGPVD) in Atlantic salmon (Salmo salar L.)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-07)Salmon gill poxvirus (SGPV) infection is a common denominator in many cases of complex gill disease in the Norwegian salmon farming industry and may, as a single agent infection, result in salmon poxvirus disease (SGPVD). Experiences from the field suggest that stress may be a decisive factor for the induction of SGPVD. Here we investigated the effect of stress hormone treatment on SGPV kinetics and ... -
First Steps Towards RAT: A Protocol for Documenting Data Use in the Agent-Based Modeling Process
(Chapter; Bokkapittel, 2021)While there is a number of frameworks and protocols in Agent-Based Modeling (ABM) that support the documentation of different aspects of a simulation study, it is surprising to find only a small number dealing with the handling of data. Here we present the results of discussions we had on the topic at the Lorentz Center workshop on Integrating Qualitative and Quantitative Evidence using Social ... -
Fish investigations in the Barents Sea winter 2017
(Research report; Forskningsrapport, 2017)Annual catch quotas and other regulations of the Barents Sea fisheries are set through negotiations between Norway and Russia. Assessment of the state of the stocks and quota advices are given by the International Council for the Exploration of the Sea (ICES). Their work is based on survey results and international landings statistics. The results from the demersal fish winter surveys in the ... -
Fish silage hydrolysates: Not only a feed nutrient, but also a useful feed additive
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-06)Background:<br> Processing of fish and shellfish may result in substantial amounts of by-products and unless they can be used as food, the most realistic option in most cases is the production of preserved feed nutrients. If large volumes are available, reduction to fishmeal and fish oil is the preferred technology. However, fresh by-products are most often available in insufficient quantities ... -
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 ... -
Fisheries economics and management
(Book; Bok, 2011-05) -
Fisheries Management and Global Warming. Effects of climate change on fisheries in the Arctic region of the Nordic countries.
(Research report; Forskningsrapport, 2014) -
Fisheries rent creation and distribution – the imaginary case of Codland
(Conference object; Konferansebidrag, 2009-08-27)This paper discusses actual and possible achievements and failures of Codland and examines it from the point of view of efficiency and in terms of distribution. It is argued in favour of the joint analysis of the two approaches when contemplating fisheries management reforms, since such reforms may create both winners and losers. The analysis demonstrates how rent drain from fishing communities and ...
