Browsing Bergen Open Research Archive by Author "Hamre, Lars Are"
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Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C
Hamre, Lars Are; Bui, Samantha; Oppedal, Frode; Skern-Mauritzen, Rasmus; Dalvin, Sussie (Peer reviewed; Journal article, 2019-09-05)The development rate of the salmon louse Lepeophtheirus salmonis is greatly influenced by seawater temperature. This study describes how the growth rate of L. salmonis changes with temperature and identifies the extreme ... -
The effect of temperature on ability of Lepeophtheirus salmonis to infect and persist on Atlantic salmon
Dalvin, Sussie; Hamre, Lars Are; Skern-Mauritzen, Rasmus; Vågseth, Tone; Stien, Lars Helge; Oppedal, Frode; Bui, Samantha (Journal article; Peer reviewed, 2020)The salmon louse (Lepeophtheirus salmonis) is an ecologically and economically important parasite of salmonid fish. Temperature is a strong influencer of biological processes in salmon lice, with development rate increased ... -
Identification of critical enzymes in the salmon louse chitin synthesis pathway as revealed by RNA interference-mediated abrogation of infectivity
Braden, Laura; Michaud, Dylan; Igboeli, Okechukwu O.; Dondrup, Michael; Hamre, Lars Are; Dalvin, Sussie; Purcell, Sara; Kongshaug, Heidi; Eichner, Christiane; Nilsen, Frank; Fast, Mark D. (Journal article; Peer reviewed, 2020)Treatment of infestation by the ectoparasite Lepeophtheirus salmonis relies on a small number of chemotherapeutant treatments that currently meet with limited success. Drugs targeting chitin synthesis have been largely ... -
Instar growth and molt increments in Lepeophtheirus salmonis (Copepoda: Caligidae) chalimus larvae
Eichner, Christiane; Hamre, Lars Are; Nilsen, Frank (Peer reviewed; Journal article, 2015-02)The salmon louse (Lepeophtheirus salmonis) is an ectoparasitic copepod causing severe problems to the fish farming industry and to wild salmonids. Morphologically, all stages in the life cycle of L. salmonis have been ... -
The potential for cleaner fish-driven evolution in the salmon louse Lepeophtheirus salmonis: Genetic or environmental control of pigmentation?
Hamre, Lars Are; Oldham, Tina Marie Wier; Oppedal, Frode; Nilsen, Frank; Glover, Kevin Alan (Journal article; Peer reviewed, 2021)The parasitic salmon louse represents one of the biggest challenges to environmentally sustainable salmonid aquaculture across the globe. This species also displays a high evolutionary potential, as demonstrated by its ... -
RNAi-mediated treatment of two vertically transmitted rhabdovirus infecting the salmon louse (Lepeophtheirus salmonis)
Øvergård, Aina-Cathrine; Hamre, Lars Are; Kongshaug, Heidi; Nilsen, Frank (Peer reviewed; Journal article, 2017-10-25)Rhabdoviruses are a family of enveloped negative-sense single-stranded RNA viruses infecting a variety of hosts. Recently, two vertically transmitted salmon louse (Lepeophtheirus salmonis) rhabdoviruses (LsRV) have been ... -
The salmon louse Lepeophtheirus salmonis (Copepoda: Caligidae) life cycle has only two chalimus stages
Hamre, Lars Are; Eichner, Christiane; Caipang, Christopher; Dalvin, Sussie Trine; Bron, James E.; Nilsen, Frank; Boxshall, Geoffrey; Skern-Mauritzen, Rasmus (Peer reviewed; Journal article, 2013-09-12)Each year the salmon louse (Lepeophtheirus salmonis Krøyer, 1838) causes multi-million dollar commercial losses to the salmon farming industry world-wide, and strict lice control regimes have been put in place to reduce ...