Blar i Rapport fra havforskningen (2007- ) på forfatter "Oppedal, Frode"
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Assessment of long-term implementation of sea lice prevention technologies: efficiency in reducing infestations and impact on fish welfare
Bui, Samantha; Stien, Lars Helge; Nilsson, Jonatan; Oppedal, Frode (Rapport fra havforskningen;45-2018, Research report, 2018) -
Avlusing med kaldt vann? – effektivitet og laksens velferd — sluttrapport FHF prosjekt 901488
Oppedal, Frode; Stien, Lars Helge; Wright, Daniel William; Moltumyr, Lene; Nilsson, Jonatan; Dempster, Timothy David; Overton, Kathy (Rapport fra havforskningen, Research report, 2019)Termisk behandling av oppdrettslaks med varmt vann blir hyppig brukt av næringen som avlusingsmetode. Behandlingen rapporteres å fjerne mobile lus effektivt, men kan også føre til dårligere fiskevelferd og økt dødelighet. ... -
Delousing Efficacy and Physiological Impacts on Atlantic Salmon of Freshwater and Hyposaline Bath Treatments
Thompson, Cameron; Madaro, Angelico; Oppedal, Frode; Stien, Lars Helge; Bui, Samantha (Rapport fra havforskningen;2023 - 11, Research report, 2023)A pilot study was conducted to investigate the delousing efficacy and physiological effects of freshwater and hyposaline water in Atlantic salmon ( Salmo salar ) for various treatment durations. There were four primary ... -
Havbasert oppdrett – hvor mye vannstrøm tåler laks og rensefisk? - fiskevelferd og grenseverdier
Hvas, Malthe; Folkedal, Ole; Oppedal, Frode (Rapport fra havforskningen;2019 - 37, Research report, 2019)I fremtiden ønskes oppdrettsanlegg på mer eksponerte lokaliteter, gjerne langt til havs. Da kan fisken oppleve langt sterkere vannstrøm enn på tradisjonelle lokaliteter. Tåler laksen dette? Det er mange fordeler med ... -
In situ sea lice egg sterilization with UVC light
Bui, Samantha; Oppedal, Frode; Barrett, Luke; Dempster, Tim; Pert, Cassie (Rapport fra havforskningen;2019 - 29, Research report, 2019)Sea-cage salmon farming creates ideal conditions for population growth of the salmon louse Lepeophtheirus salmonis, potentially leading to poor welfare and mortality in farmed salmon and nearby wild salmonids. Frequent ... -
Lusepåslag og velferd hos dypfôret og overflatefôret laks på lokalitet Skrubbholmen midtvinters. – Delrapport fra FHF-prosjekt 901154 «Dypelysogfôring»
Nilsson, Jonatan; Stien, Lars Helge; Oppedal, Frode (Rapport fra havforskningen;35-2018, Research report, 2018) -
Production, fasting and delousing of triploid and diploid salmon in Northern Norway - Report for the 2020-generation
Stien, Lars Helge; Thompson, Cameron; Fjelldal, Per Gunnar; Oppedal, Frode; Kristiansen, Tore S; Sæther, Per Anton; Bølgen, Per Magne; Martinsen, Lisbeth (Rapport fra havforskningen;2023 - 20, Research report, 2023)This report is an investigation into the 2020 generation of triploid salmon in Northern Norway and their diploid comparators. The trajectory of 16 fish groups comprising more than 10 million fish is described throughout ... -
Snorkelmerd: Produksjonseffektivitet, adferd og velferd. Sluttrapport FHF-prosjekt 900884
Oppedal, Frode; Dempster, Tim; Stien, Lars Helge (Rapport fra Havforskningen;9-2016, Research report, 2016-02)English: The snorkel cage creates a mismatch between the salmon lice infestative larvae stage and the salmon, thus minimizing infestations. The snorkel cages comprise a roof of net to keep the fish down, but with a tarpaulin ... -
Summary and status of deep lights and deep feed use in commercial settings: welfare, behaviour and infestation at three case study sites — End report from the FHF projects 901154 “Dypelysogfôring”
Bui, Samantha; Oppedal, Frode; Nilsson, Jonatan; Oldham, Tina Marie Wier; Stien, Lars Helge (Rapport fra havforskningen, Research report, 2019)Infective salmon lice are attracted to light and are therefore more abundant near the surface than deep in the cage. Manipulating salmon swimming depth by the use of deep lights and deep feeding could therefore spatially ... -
The Well – Mixing skirt and freshwater lens concepts with smart-lighting and -feeding to enhance lice prevention and safeguard fish welfare
Wright, Daniel William; Stien, Lars Helge; Oppedal, Frode; Sievers, Michael; Ditria, Ellen; Trengereid, Henrik (Rapport fra havforskningen, Research report, 2019)A commercial scale sea-cage design, combining skirt and freshwater lens concepts with smart lighting and feeding for improved lice prevention and fish welfare, was trialed. Environment, lice levels and fish welfare were ... -
Utvikling av lakselus ved ulik temperatur og lys - TEMPLUS
Dalvin, Sussie; Oppedal, Frode (Rapport fra havforskningen;2019 - 13, Research report, 2019)Lakselus påvirkes sterkt av miljøfaktorer som sjøvannets temperatur og saltholdighet. Sjøvannstemperaturen langs varierer sterkt avhengig av sesong og geografisk plassering. Saltholdighet utviser også store forskjeller ...