Browsing Bergen Open Research Archive by Author "Wergeland, Heidrun Inger"
Now showing items 1-14 of 14
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Antibiotic uptake by cultured Atlantic cod leucocytes and effect on intracellular Francisella noatunensis subsp. noatunensis replication
Kaldestad, Marte Albriktsen; Haugland, Gyri Teien; Rønneseth, Anita; Wergeland, Heidrun Inger; Samuelsen, Ole Bent (Peer reviewed; Journal article, 2014-02-04)The granuloma disease caused by Francisella noatunensis subsp. noatunensis in farmed Atlantic cod has not been successfully treated by use of antibacterials, even when antibacterial resistance testing indicates a sufficient ... -
A case study of biofilter activation and microbial nitrification in a marine recirculation aquaculture system for rearing Atlantic salmon (Salmo salar L.)
Roalkvam, Irene; Drønen, Karine; Dahle, Håkon; Wergeland, Heidrun Inger (Peer reviewed; Journal article, 2020-09)Marine recirculation aquaculture system (RAS) is a prominent technology within fish farming. However, the nitrifying bacteria in the biofilter have low growth rates, which can make the biofilter activation a long and ... -
Characterization of Small, Mononuclear Blood Cells from Salmon Having High Phagocytic Capacity and Ability to Differentiate into Dendritic like Cells
Haugland, Gyri Teien; Jordal, Ann-Elise Olderbakk; Wergeland, Heidrun Inger (Peer reviewed; Journal article, 2012-11-14)Phagocytes are the principal component of the innate immune system, playing a key role in the clearance of foreign particles that include potential pathogens. In vertebrates, both neutrophils and mononuclear cells like ... -
Development of anaesthetic protocols for lumpfish (Cyclopterus lumpus L.): Effect of anaesthetic concentrations, sea water temperature and body weight
Skår, Malene W.; Haugland, Gyri Teien; Powell, Mark; Wergeland, Heidrun Inger; Samuelsen, Ole Bent (Peer reviewed; Journal article, 2017-07-05)In recent years, use of lumpfish (Cyclopterus lumpus L.) as cleaner-fish to remove sea-lice have been chosen by many salmon farmers in Europe and Canada as an alternative to medical treatment, which has led to large scale ... -
Genomic analysis of pasteurella atlantica provides insight on its virulence factors and phylogeny and highlights the potential of reverse vaccinology in aquaculture
Ellul, Rebecca Marie; Kalatzis, Panos G.; Frantzen, Cyril Alexander; Haugland, Gyri Teien; Gulla, Snorre; Colquhoun, Duncan John; Middelboe, Mathias; Wergeland, Heidrun Inger; Rønneseth, Anita (Journal article; Peer reviewed, 2021)Pasteurellosis in farmed lumpsuckers, Cyclopterus lumpus, has emerged as a serious disease in Norwegian aquaculture in recent years. Genomic characterization of the causative agent is essential in understanding the biology ... -
Microbial colonization and community stability in a marine post-smolt RAS inoculated with a commercial starter culture
Drønen, Asbjørg Karine; Roalkvam, Irene; Dahle, Håkon; Nilsen, Hanne Katrine; Olsen, Anne Berit; Wergeland, Heidrun Inger (Journal article; Peer reviewed, 2021)The performance of a commercial starter culture was investigated in a new marine post-smolt RAS, analyzing the microbial communities of 100 samples collected monthly over a year from biofilter biofilm carriers, tank wall ... -
Microbial Communities in a Flow-Through Fish Farm for Lumpfish (Cyclopterus lumpus L.) During Healthy Rearing Conditions
Roalkvam, Irene; Drønen, Karine; Dahle, Håkon; Wergeland, Heidrun Inger (Peer reviewed; Journal article, 2019-07-12)Lumpfish can efficiently remove sea lice from Atlantic salmon in net-pens, and production of lumpfish in closed fish farms is a new, fast developing industry in Norway. However, periodic outbreaks of bacterial diseases in ... -
Microbiome dataset from a marine recirculating aquaculture system (RAS) for salmon post-smolt production in Norway
Drønen, Karine; Roalkvam, I.; Dahle, Hakon; Olsen, Anne Berit; Nilsen, Hanne Katrine; Wergeland, Heidrun Inger (Journal article; Peer reviewed, 2022)A marine aquaculture recycling system (RAS) for the production of post-smolt was monitored for microbial community structures during the first year of operation. Sample material was obtained monthly from the biofilter ... -
Neutrophils in Atlantic salmon (Salmo salar L.) are MHC class II+ and secret IL-12p40 upon bacterial exposure
Haugland, Gyri Teien; Rønneseth, Anita; Gundersen, Lene; Lunde, Harald Sæbø; Nordland, Kaja; Wergeland, Heidrun Inger (Journal article; Peer reviewed, 2022)Antigen-presentation via major histocompatibility complex (MHC) to T cells is the key event to initiate adaptive immune responses. In teleosts, as in mammals, the main types of professional antigen-presenting cells (APCs) ... -
Phaeobacter gallaeciensis Reduces Vibrio anguillarum in Cultures of Microalgae and Rotifers, and Prevents Vibriosis in Cod Larvae
D’Alvise, Paul W.; Lillebø, Siril; Prol-Garcia, Maria J.; Wergeland, Heidrun Inger; Nielsen, Kristian F.; Bergh, Øivind; Gram, Lone (Peer reviewed; Journal article, 2012-08-22)Phaeobacter gallaeciensis can antagonize fish-pathogenic bacteria in vitro, and the purpose of this study was to evaluate the organism as a probiont for marine fish larvae and their feed cultures. An in vivo mechanism of ... -
Phagocytosis and Respiratory Burst Activity in Lumpsucker (Cyclopterus lumpus L.) Leucocytes Analysed by Flow Cytometry
Haugland, Gyri Teien; Jakobsen, Ragnhild Aakre; Vestvik, Nils; Ulven, Kristian; Stokka, Lene; Wergeland, Heidrun Inger (Peer reviewed; Journal article, 2012-10-24)In the present study, we have isolated leucocytes from peripheral blood, head kidney and spleen from lumpsucker (Cyclopterus lumpus L.), and performed functional studies like phagocytosis and respiratory burst, as well as ... -
Pharmacokinetic Data Show That Oxolinic Acid and Flumequine Are Absorbed and Excreted Rapidly From Plasma and Tissues of Lumpfish
Haugland, Gyri Teien; Kverme, Karen obrestad; Hannisdal, Rita; Kallekleiv, Marielle; Colquhoun, Duncan John; Lunestad, Bjørn Tore; Wergeland, Heidrun Inger; Samuelsen, Ole Bent (Peer reviewed; Journal article, 2019-11-12)This study examined the uptake, tissue distribution and elimination of the antibacterial agents oxolinic acid and flumequine in lumpfish (Cyclopterus lumpus L.) by use of LC-MS/MS following a single oral administration of ... -
Pharmacokinetics of florfenicol in lumpfish (Cyclopterus lumpus L.) after a single oral administration
Kverme, Karen Obrestad; Haugland, Gyri Teien; Hannisdal, Rita; Kallekleiv, Marielle; Colquhoun, Duncan John; Lunestad, Bjørn Tore; Wergeland, Heidrun Inger; Samuelsen, Ole Bent (Peer reviewed; Journal article, 2019)Farming of lumpfish for biological removal of sea lice from farmed Atlantic salmon has expanded rapidly in Europe and Canada over the last 5–6 years and the lumpfish has become an economically important species. There are, ... -
Presence and habitats of bacterial fish pathogen relatives in a marine salmon post-smolt RAS
Drønen, Asbjørg Karine; Roalkvam, Irene; Nilsen, Hanne Katrine; Olsen, Anne Berit; Dahle, Håkon; Wergeland, Heidrun Inger (Journal article; Peer reviewed, 2022)Recycling aquaculture system (RAS) requires well-functioning microbial communities to support fish welfare and to minimize the risk of spreading diseases. In this study of a marine post-smolt RAS we searched for groups of ...