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norskArtikler, rapporter og annet (Norges fiskerihøgskole): Recent submissions
Now showing items 561-580 of 1061
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Cleaner fish in aquaculture: review on diseases and vaccination
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-26)Combating and controlling sea lice causes large economic costs for the farmers, with estimated values of more than 305 million euros (€) per year. Increased resistance against traditional chemotherapeutants due to evolutionary drivers in the sea lice combined with the lack of an effective vaccine and few other chemical treatments available are expected to cause these costs to increase. Several ... -
Detection of specific Atlantic salmon antibodies against salmonid alphavirus using a bead-based immunoassay
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-30)Salmonid alphavirus (SAV) is the etiological cause of pancreas disease (PD) in Atlantic salmon (<i>Salmo salar</i>). Several vaccines against SAV are in use, but PD still cause significant mortality and concern in European aquaculture, raising the need for optimal tools to monitor SAV immunity. To monitor and control the distribution of PD in Norway, all salmonid farms are regularly screened for SAV ... -
The Atlantic Salmon Gill Transcriptome Response in a Natural Outbreak of Salmon Gill Pox Virus Infection Reveals New Biomarkers of Gill Pathology and Suppression of Mucosal Defense
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-04)The salmon gill poxvirus (SGPV) is a large DNA virus that infects gill epithelial cells in Atlantic salmon and is associated with acute high mortality disease outbreaks in aquaculture. The pathological effects of SGPV infection include gill epithelial apoptosis in the acute phase of the disease and hyperplasia of gill epithelial cells in surviving fish, causing damage to the gill respiratory surface. ... -
Risikorapport norsk fiskeoppdrett 2018
(Research report; Forskningsrapport, 2018)Risikorapporten omhandler både miljøpåvirkninger av havbruk og fiskevelferd, og legger vekt på overordnede problemstillinger som myndighetene vil ha råd om. Metodene som brukes for å risikovurdere er under stadig utvikling, og er oppdatert i årets rapport. På sikt er det ønskelig å kunne utføre regionale risikovurderinger hvor de ulike risikofaktorene sees i sammenheng. Rapporten er bestilt av ... -
Oppfølging av miljøundersøkelsen i vannforekomsten Finnfjord Indre
(Research report; Forskningsrapport, 2017)I 2014 påla Miljødirektorat Finnfjord AS først å utarbeide et program for vannovervåking, og deretter gjennomføre dette, i vannforekomsten Finnfjord Indre. Endelig rapport ble sendt inn 29 februar 2016, og i en foreløpig tilbakemelding fra Miljødirektoratet i brev datert 4 april 2016 konkluderer de med at det er behov for en ny undersøkelse som ... -
Miljøundersøkelse i vannforekomsten Finnfjord Indre i Lenvik Kommune, Troms fylke.
(Research report; Forskningsrapport, 2016)Miljødirektoratet påla i mai 2015 Finnfjord AS og andre industribedrifter å gjennomføre vannovervåking i vannforekomsten bedriftene har utslipp til. Finnfjord AS engasjerte Akvaplan Niva AS til å utarbeide et program for miljøundersøkelse i vannforekomsten Finnfjorden Indre.(Akvaplan-niva AS Rapport: 7386-01). Programmet ble akseptert av Miljødirektoratet ... -
Comparing the size selectivity of a novel T90 mesh codend to two conventional codends in the northern shrimp (Pandalus borealis) trawl fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-28)The size selectivity and usability of three codends were quantified and compared for the first time in the inshore Northern shrimp (<i>Pandalus borealis</i>) trawl fishery of Iceland using the covered codend method: a conventional diamond-mesh codend (T0), conventional square-mesh codend (T45), and a 90° turned mesh codend (T90) constructed of four panels and with shortened lastridge ropes. Fishers, ... -
The Atlantic Salmon Gill Transcriptome Response in a Natural Outbreak of Salmon Gill Pox Virus Infection Reveals New Biomarkers of Gill Pathology and Suppression of Mucosal Defense
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-04)The salmon gill poxvirus (SGPV) is a large DNA virus that infects gill epithelial cells in Atlantic salmon and is associated with acute high mortality disease outbreaks in aquaculture. The pathological effects of SGPV infection include gill epithelial apoptosis in the acute phase of the disease and hyperplasia of gill epithelial cells in surviving fish, causing damage to the gill respiratory surface. ... -
Marine biomonitoring with eDNA: Can metabarcoding of water samples cut it as a tool for surveying benthic communities?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-24)In the marine realm, biomonitoring using environmental DNA (eDNA) of benthic communities requires destructive direct sampling or the setting‐up of settlement structures. Comparatively much less effort is required to sample the water column, which can be accessed remotely. In this study we assess the feasibility of obtaining information from the eukaryotic benthic communities by sampling the adjacent ... -
Space-time dynamics in monitoring neotropical fish communities using eDNA metabarcoding
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-01)The biodiverse Neotropical ecoregion remains insufficiently assessed, poorly managed, and threatened by unregulated human activities. Novel, rapid and cost-effective DNA-based approaches are valuable to improve understanding of the biological communities and for biomonitoring in remote areas. Here, we evaluate the potential of environmental DNA (eDNA) metabarcoding for assessing the structure and ... -
Use and non-use values in an applied bioeconomic model of fisheries and habitat connections
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-07-25)In addition to indirect support to fisheries, marine habitats also provide non-use benefits often overlooked in most bioeconomic models. We expand a dynamic bioeconomic fisheries model where presence of natural habitats reduces fishing cost via aggregation effects and provides non-use benefits. The theoretical model is illustrated with an application to cold-water corals in Norway where two fishing ... -
Prediction of square mesh panel and codend size selectivity of blue whiting based on fish morphology
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-24)Square mesh panels (SMPs) are selective devices used extensively to supplement codend size selectivity in trawl fisheries. Therefore, predictions of the effect of mesh size in both SMPs and codends on size selectivity are valuable. Here, we established a framework to predict the size selection of blue whiting through different SMPs and diamond mesh codends based on the morphological characteristics ... -
MultiSEPT - Full scale tests of the semicircular spreading gear (SCSG)
(Research report; Forskningsrapport, 2013-06-24)This reportdescribes full scale tests at sea with the semi-circular spreading gear (SCSG). This activity is part of Work Package 3 (WP3: Development of new ground gear) of the MultiSEPT project. The spreading of the SCSG and rockhopper gear was measured by useof MARPORT distance sensors. Bottom contact was monitored by use of SCANMARtrawl sensors and by underwater cameras mounted in the headline ... -
Effect of mechanical properties of monofilament twines on the catch efficiency of biodegradable gillnets
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-24)Gillnets made of the biodegradable resin polybutylene succinate co-adipate-co-terephthalate were tested under commercial fishing conditions to compare their fishing performance with that of conventional nylon polyamide (PA) gillnets. Both types of gillnets were made of 0.55 mm Ø monofilaments. However, since the biodegradable nets are weaker than nylon PA nets when using the same monofilament diameter, ... -
Erfaringer og analyser fra drift av oppdrettsanlegg på eksponerte lokaliteter
(Research report; Forskningsrapport, 2012-03-29)Dette forprosjektet har hatt som mål å legge til rette for videreutvikling av forskningsrelaterte problemstillinger innen tema drift av eksponerte oppdrettslokaliteter. Eksponerte lokaliteter er her derfor å forstå som "oppdrettslokaliteter som er mer utsatt for bølger, strøm og/eller vind enn de fleste lokaliteter er i dag". Fokuset har vært på teknologi, mennesker og fisk. Prosjektet har samlet ... -
Internasjonal teineteknologi sett opp mot norske forhold Kan canadisk teineteknologi være et altenativ i det norske torskefiskeriet?
(Research report; Forskningsrapport, 2011-07-11)Pa tross av at det har vrert jobbet mye med utvikling av teine i Norge har dette redsk.apet ik.ke oppnadd tilstrekkelige fangstrater tit a fa innpass i kommerSielt fiskeri, selv om prinsippet med teinedrift er 0nsket av fiskelinii?linga. Malsetningen med dette prosjek.tet var a vurdere om det finnes teinefiskerier andre steder i verden med en teknologi som vii Vii?re mulig a overf0re til norske ... -
Konsekvensutredning- verktøy for mer bærekraftig akvakultur
(Research report; Forskningsrapport, 2011-11-23)Konsekvensutredninger (KU) er et vanlig instrument i planlegging av større tiltak på land. Når det gjelder tiltak i sjøområdene er det mindre utbredt, selv om det siden 1997 har vært mulig for forvaltningen å kreve KU for «større akvakulturanlegg». Definisjonen av større oppdrettsanlegg er knyttet til en lokalitetsstørrelse på 3600 MTB, eller mer. Utviklingen innen akvakulturnæringen har medført ... -
En mulighetsstudie for økt vekst innen innlandsoppdrett
(Research report; Forskningsrapport, 2010-06-29)SINTEF Fiskeri og havbruk har sammen med Bioforsk Nord og Nofuna Marked gjennomført en vurdering av mulighetene for økt vekst innen innlandsoppdrett i Norge. Følgende arter er vurdert: Røye, ørret, sik, regnbueørret, gjørs, abbor og lake. Studien gir en oversikt over innlandsoppdrett i Norge og i andre nordiske land. Mulighetene for utvikling av en innlandsoppdrettsnæring i Norge er ellers vurdert ... -
A broad-host-range event detector: expanding and quantifying performance between Escherichia coli and Pseudomonas species
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-24)Modern microbial biodesign relies on the principle that well-characterized genetic parts can be reused and reconfigured for different functions. However, this paradigm has only been successful in a limited set of hosts, mostly comprised from common lab strains of <i>Escherichia coli</i>. It is clear that new applications such as chemical sensing and event logging in complex environments will benefit ... -
Oxidant-induced modifications in the mucosal transcriptome and circulating metabolome of Atlantic salmon
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-06)Here we report the molecular networks associated with the mucosal and systemic responses to peracetic acid (PAA), a candidate oxidative chemotherapeutic in Atlantic salmon (<i>Salmo salar</i>). Smolts were exposed to different therapeutic doses (0, 0.6 and 2.4 mg/L) of PAA for 5 min, followed by a re-exposure to the same concentrations for 30 min 2 weeks later. PAA-exposed groups have higher external ...
