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norskNorges fiskerihøgskole: Nye registreringer
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Balancing conservation goals and ecotourism development in coastal wetland management in Sri Lanka: A choice experiment
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-15)Understanding the tradeoff between tourism development and environmental conservation is essential for the sustainable management of ecotourism. Accordingly, we conducted a choice experiment (CE) using valuation workshops to estimate the preferences of foreign tourists for ecotourism development and biodiversity conservation in Rekawa coastal wetland in Southern Sri Lanka. Transforming preferences ... -
The rise and decline of fishing industry support – with a translation from Norwegian of Bjørn S. Brochmann's 1981 article ‘long-term effects of government support to the fisheries’
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-21)Input and output measures, including the use of (Pigou) taxes, have been recommended to bridge the gap between average and marginal revenues in fisheries. Several countries have improved management, but few have followed the fiscal recommendations. On the contrary, subsidies that can expand capacity and effort have been and still are used. For decades, international organizations such as the WTO, ... -
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 ... -
Guidelines for co-creating climate adaptation plans for fisheries and aquaculture
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-27)Climate change is having a significant impact on the biology and ecology of fish stocks and aquaculture species and will affect the productivity within seafood supply chains in the future. The challenges are further amplified when actors within the fisheries and aquaculture sectors have very different ideas and assumptions about climate change and what risks and opportunities they entail. In order ... -
Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-26)Several shrimp trawl fisheries use a Nordmöre sorting grid to avoid bycatch of fish. However, small fish can pass through the grid. Therefore, the retention of juvenile fish often remains an issue during shrimp trawling. We investigated the vertical distribution of deepwater shrimp (<i>Pandalus borealis</i>) and dominant bycatch species at the point where the Nordmöre grid section is installed. This ... -
Genome editing on finfish: Current status and implications for sustainability
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-26)Novel genome editing techniques allow for efficient and targeted improvement of aquaculture stock and might be a solution to solve challenges related to disease and environmental impacts. This review has retrieved the latest research on genome editing on aquacultured finfish species, exploring the technological progress and the scope. Genome editing has most often been used on Nile tilapia (<i>Oreochromis ... -
Praksis som læringsform i studier uten profesjonstilknytning - utfordringer og muligheter
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-28)Hvilke muligheter og utfordringer kan oppstå med praksis som læringsform i utdanninger som ikke er spesifikt profesjonsrettet? I profesjonsutdanninger deler praksisvirksomhetene og utdanningsinstitusjonene ofte en felles forståelse av hva som skal oppnås i praksis, mens i ikke-profesjonsrettede studieløp er det andre utfordringer. I et nylig oppstartet prosjekt som heter «Samarbeid om praksis i ... -
Synthesis and Evaluation of the Tetracyclic Ring-System of Isocryptolepine and Regioiso-Mers for Antimalarial, Antiproliferative and Antimicrobial Activities
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-30)A series of novel quinoline-based tetracyclic ring-systems were synthesized and evaluated in vitro for their antiplasmodial, antiproliferative and antimicrobial activities. The novel hydroiodide salts 10 and 21 showed the most promising antiplasmodial inhibition, with compound 10 displaying higher selectivity than the employed standards. The antiproliferative assay revealed novel pyridophenanthridine ... -
Piscine Orthoreovirus (PRV)-3, but Not PRV-2, Cross-Protects against PRV-1 and Heart and Skeletal Muscle Inflammation in Atlantic Salmon
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-06)Heart and skeletal muscle inflammation (HSMI), caused by infection with Piscine orthoreovirus-1 (PRV-1), is a common disease in farmed Atlantic salmon (Salmo salar). Both an inactivated whole virus vaccine and a DNA vaccine have previously been tested experimentally against HSMI and demonstrated to give partial but not full protection. To understand the mechanisms involved in protection against HSMI ... -
Adding zooplankton to the OSMAC toolkit: Effect of grazing stress on the metabolic profile and bioactivity of a diatom
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-03)“One strain many compounds” (OSMAC) based approaches have been widely used in the search for bioactive compounds. Introducing stress factors like nutrient limitation, UV-light or cocultivation with competing organisms has successfully been used in prokaryote cultivation. It is known that diatom physiology is affected by changed cultivation conditions such as temperature, nutrient concentration and ... -
Flashing light emitting diodes (LEDs) induce proteins, polyunsaturated fatty acids and pigments in three microalgae
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-25)As the periodic emission of light pulses by light emitting diodes (LEDs) is known to stimulate growth or induce high value biocompounds in microalgae, this flashing light regime was tested on growth and biochemical composition of the microalgae <i>Nannochloropsis gaditana, Koliella antarctica</i> and <i>Tetraselmis chui</i>. At low flashing light frequencies (e.g., 5 and 50 Hz, Duty cycle = 0.05), ... -
Produksjonsindusert stress på rogn (Salmo salar L.) og effekter på immun- og stressrelaterte gener etter smitte av plommesekkyngel med Yersinia ruckeri
(Master thesis; Mastergradsoppgave, 2016-05-18)I denne oppgaven blir det sett på hvordan produksjonsindusert stress i form av mekanisk sjokking og/eller transport under embryogenesen (300-400 døgngrader etter befruktning (dgr)) ville påvirke overlevelse og uttrykk av immun- og stressrelaterte gener på plommesekkstadiet (740-900 dgr) etter en immunologisk utfordring - badsmitte med <i>Yersinia ruckeri</i>. Utvalgte immun- og stressrelaterte gener ... -
Humorale immunresponser i bukhule og systemiske organer hos Atlantisk laks (Salmo salar L.) – sammenligning av levende og inaktivert salmonid alphavirus 3 administrert i bukhulen
(Master thesis; Mastergradsoppgave, 2019-05-15)Pankreassykdom (PD) er en sykdom som forårsakes av salmonid alphavirus (SAV) og anses som en av de mest utbredte virussykdommene i dagens oppdrettsnæring. I tillegg til at sykdommen fører til store tap for næringa, utgjør sykdommen også et stort problem sett fra et fiskevelferds-perspektiv. Siden det ikke finnes behandling mot sykdommen ligger fokuset på forebyggende tiltak. Det er utviklet flere ... -
Hav, fisk og ressursforvaltning i nordområdene
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-08)Mesteparten av norske havområder ligger nord for polarsirkelen og er åsted for noen av verdens rikeste fiskerier. De største fiskebestandene er delt med andre land, og internasjonalt samarbeid om ressursforvaltningen er derfor en viktig dimensjon ved nordområdepolitikken. Slikt samarbeid er basert på globale normer om hvordan levende marine ressurser skal forvaltes og deles og foregår på en rekke ... -
Environmental DNA for assessing abundance of salmon lice (Lepeophtheirus salmonis) in salmon (Salmo salar) farms
(Master thesis; Mastergradsoppgave, 2018-05-18)The aim of this thesis was to investigate an alternative way to detect salmon lice (Lepeophtheirus salmonis) in the field, and investigate the possibility of counting salmon lice in a commercial farming facility of Atlantic salmon (Salmo salar) by using methods and tools based on environmental DNA (henceforth referred to as eDNA). This was performed by sampling water in a salmon farming facility ... -
Spiser studenter i Nord-Norge nok fisk? En spørreundersøkelse blant studenter ved Universitetet i Tromsø
(Master thesis; Mastergradsoppgave, 2018-05-15)Et godt kosthold er av stor betydning for helsen og livskvaliteten. Et godt og variert kosthold bidrar til å forebygge mot en rekke livsstilsykdommer som hjerte- og karsykdommer, diabetes, fedme og overvekt. Fisk og annen sjømat er en nøkkelstein i et godt kosthold og gir viktige næringsstoffer som vitaminer (A og D), mineraler (selen og jod), proteiner og essensielle fettsyrer (omega-3 fettsyrene ... -
A visitor that has come to stay? The case of pink salmon (Oncorhynchus gorbuscha) in Norway
(Master thesis; Mastergradsoppgave, 2020-05-15)This thesis is dedicated to the case of the pink salmon (Oncorhynchus gorbuscha) in Norway. The pink salmon has a large native range and is indigenous to regions of the Pacific Ocean. It was deliberately introduced into rivers that drained into the White Sea by the Soviet Union. This was done through several attempts reaching from 1957 to 2001. These attempts resulted in secondary expansion to the ... -
Biokjemisk sammensetning og bioaktivitet i enzymatisk hydrolyserte torskehoder
(Master thesis; Mastergradsoppgave, 2020-05-15)I Norge utgjør ikke-smittsomme sykdommer hele 87 % av sykdomsbyrden (FHI, 2018). Hovedårsaken til disse sykdommene er feilernæring (Mozaffarian, 2016). At fisk og sjømat er bra for helsen er godt akseptert, men helsefordelene har i hovedsak vært knyttet til den gunstige fettsyresammensetningen i sjømat. I de senere år har interessen for bioaktive komponenter økt, og marint restråstoff kan være en ... -
Biochemical composition and antioxidant capacity of two sea cucumbers (Cucumaria frondosa and Parastichopus tremulus)
(Master thesis; Mastergradsoppgave, 2020-05-15)Sea cucumber is one of the most expensive seafood products in the world and dried sea cucumbers can be valued at more than USD 300 per kilogram for Astichopus japonicus, which is one of the highest priced species. Both market and consumption are centred in East- Asia. Sea cucumbers are sold in various forms, but the majority are distributed to the ’beche-de-mer’ market (gutted, boiled and dried ... -
Ecological speciation in European whitefish is driven by a large‐gaped predator
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-13)Lake‐dwelling fish that form species pairs/flocks characterized by body size divergence are important model systems for speciation research. Although several sources of divergent selection have been identified in these systems, their importance for driving the speciation process remains elusive. A major problem is that in retrospect, we cannot distinguish selection pressures that initiated divergence ...
