Blar i forfatter Norges fiskerihøgskole "Dalum, Alf Seljenes"

Viser treff 1-3 av 3

    • Nanofiltration of intake water in RAS: Effect on fish performance, health and welfare 

      Ytrestøyl, Trine; Sveen, Lene; Krasnov, Aleksei; Dalum, Alf Seljenes; Kolarevic, Jelena (Research report; Forskningsrapport, 2022)
      The experiment tested the effect of nanomembrane filtration in RAS on the salmon's physiology, welfare and growth. A specially designed membrane was used to remove sulphate from seawater and to adjust salinity from 32 to 12 ‰. A RAS where salinity was adjusted to 12 ‰ by mixing raw seawater and freshwater was used as control. The fish were kept in the two systems for 10 weeks before being ...

    • Production of lumpfish (Cyclopterus lumpus L.) in RAS with distinct water treatments: Effects on fish survival, growth, gill health and microbial communities in rearing water and biofilm 

      Dahle, Stine Veronica Wiborg; Bakke, Ingrid; Birkeland, Mari; Nordøy, Kristian; Dalum, Alf Seljenes; Attramadal, Kari Johanne Kihle (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-08)
      Lumpfish (<i>Cyclopterus lumpus</i> L.) in Norway is currently produced in traditional flow-through systems (FTS). Hatcheries frequently show signs of bacterial infections, unstable microbial communities in the rearing water and varying mortality. Recirculating aquaculture systems (RAS) is proposed to create stable and healthy microbial environments, with less probabilities for blooming of opportunistic ...

    • Radiological detection of nephrocalcinosis in farmed Atlantic salmon Salmo salar L. 

      Klykken, Christine; Dalum, Alf Seljenes; Reed, Anne Katrine; Attramadal, Kari; Olsen, Rolf Erik; Boissonnot, Lauris Jeannine Ernestine (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-14)
      Nephrocalcinosis is a common disorder in nurseries in Norway (Klykken, Reed, et al., 2022) and was reported as one of the main welfare challenges in farmed salmon by The Norwegian Fish Health Report of 2019 (Sommerset et al., 2020). Nephrocalcinosis is described as deposits of minerals within the kidneys (Bruno, 1996), that can disturb kidney function, which in turn can have dramatic consequences ...