scholarly journals The potential for cleaner fish‐driven evolution in the salmon louse Lepeophtheirus salmonis : Genetic or environmental control of pigmentation?

2021 ◽  
Author(s):  
Lars Are Hamre ◽  
Tina Oldham ◽  
Frode Oppedal ◽  
Frank Nilsen ◽  
Kevin Alan Glover
Keyword(s):  
Environmental Control ◽  
Lepeophtheirus Salmonis ◽  
Salmon Louse ◽  
Cleaner Fish

scholarly journals Salmon Louse (Lepeophtheirus salmonis (Krøyer)) Control Methods and Efficacy in Atlantic Salmon (Salmo salar (Linnaeus)) Aquaculture: A Literature Review

Fishes ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 11 ◽  
Author(s):  
Kristine Cerbule ◽  
Jacques Godfroid
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Fish Mortality ◽  
Lepeophtheirus Salmonis ◽  
Fish Health ◽  
Farmed Fish ◽  
Salmon Louse ◽  
Cleaner Fish ◽  
Atlantic Salmon Salmo Salar ◽  
Treatment And Prevention

The salmon louse (Lepeophtheirus salmonis) causes problems in Atlantic salmon (Salmo salar) aquaculture in the Northern Hemisphere, because infestations can result in both a loss of production and in fish mortality. Several types of treatment have been used to control louse infestations, but these have seen varying success. The aim of this review is to examine the efficacy and safety of commonly used treatments (chemical, biological, mechanical, and preventive measures) as documented in peer-reviewed publications. Efficacy is assessed in relation to a reduction in numbers of lice, and safety is assessed as a lack of negative treatment-associated effects on fish health and welfare (Atlantic salmon and/or cleaner fish). Most chemical treatments showed decreasing efficacy over time, together with the use of increasing concentrations as a result of the development of resistance to the treatments by lice. The need for a restrictive use of pesticides to preserve treatment efficacy has been emphasized. The use of cleaner fish was suggested to be effective, with few or no negative effects towards Atlantic salmon. The use of cleaner fish would be preferable to chemical treatment if the farmed fish health and welfare criteria are met. At present, the number of peer-reviewed publications relating to other forms of treatment and prevention are sparse.

Diel vertical distribution of early marine phase juvenile pink salmon (Oncorhynchus gorbuscha) and behaviour when exposed to salmon louse (Lepeophtheirus salmonis)

2011 ◽  
Vol 89 (9) ◽  
pp. 796-807 ◽  
Author(s):  
S. Tang ◽  
A.G. Lewis ◽  
M. Sackville ◽  
L. Nendick ◽  
C. DiBacco ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Water Column ◽  
Pink Salmon ◽  
Distribution Patterns ◽  
Oncorhynchus Gorbuscha ◽  
Lepeophtheirus Salmonis ◽  
Night Time ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Salmon Louse ◽  
Seawater Acclimation

We observed diel vertical migration patterns in juvenile pink salmon ( Oncorhynchus gorbuscha (Walbaum, 1792)) and tested the hypothesis that fish behaviour is altered by exposure to sea lice copepodids. Experiments involved replicated field deployments of a large (9 m) plankton column, which provided a vertical distribution enclosure under natural light and salinity conditions. Diel vertical distributions of juvenile pink salmon were observed during the first 3 weeks of seawater acclimation in both the presence and the absence of the ectoparasitic salmon louse ( Lepeophtheirus salmonis (Krøyer, 1838)). Immediately upon entering seawater, juvenile pink salmon preferred the top 1 m of the water column, but they moved significantly deeper down the vertical water column as seawater acclimation time increased. A significant diel migration pattern was observed, which involved a preference for the surface at night-time, compared with daytime. When fish in the column were exposed to L. salmonis copepodids for 3 h, 43%–62% of fish became infected, fish expanded their vertical distribution range, and significant changes in vertical distribution patterns were observed.

scholarly journals Rainbow trout Oncorhynchus mykiss skin responses to salmon louse Lepeophtheirus salmonis: From copepodid to adult stage

2020 ◽  
Vol 103 ◽  
pp. 200-210 ◽  
Author(s):  
Sussie Dalvin ◽  
Louise v.G. Jørgensen ◽  
Per W. Kania ◽  
Sindre Grotmol ◽  
Kurt Buchmann ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Adult Stage ◽  
Lepeophtheirus Salmonis ◽  
Salmon Louse ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Skin Responses

scholarly journals Ultrastructure of the cuticle of the chalimus larva of the salmon louse Lepeophtheirus salmonis (Krøyer, 1837) (Copepoda: Caligidae)

2000 ◽  
Vol 69 (1-2) ◽  
pp. 39-49 ◽  
Author(s):  
J.E. Bron ◽  
A.P. Shinn ◽  
C. Sommerville
Keyword(s):  
Lepeophtheirus Salmonis ◽  
Free Living ◽  
Salmon Louse ◽  
Parasitic Species

The cuticle of the chalimus II stage of Lepeophtheirus salmonis (Copepoda: Caligidae) comprised a four-layered epicuticle with a pronounced fuzzy coat which was separated from the outer and inner procuticles by a layer of transitional procuticle. The cuticle is underlain by a single-layered epidermis which overlies integumental glands and chromatophores. The structure of this cuticle is very similar to that described for free-living copepods and does not display the modifications associated with more highly transformed parasitic species.

Genetic variation in resistance of Atlantic salmon (Salmo salar) to the salmon louse Lepeophtheirus salmonis

Aquaculture ◽  
2005 ◽  
Vol 247 (1-4) ◽  
pp. 145-151 ◽  
Author(s):  
Kari Kolstad ◽  
Peter Andreas Heuch ◽  
Bjarne Gjerde ◽  
Trygve Gjedrem ◽  
Ragnar Salte
Keyword(s):  
Genetic Variation ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Lepeophtheirus Salmonis ◽  
Salmon Louse ◽  
Atlantic Salmon Salmo Salar
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