Search

Your search keyword '"Lepeophteirus salmonis"' showing total 4 results
Start Over Descriptor "Lepeophteirus salmonis"
4 results on '"Lepeophteirus salmonis"'

1. Effective protection against sea lice during the production of Atlantic salmon in floating enclosures.

Author

Nilsen, Arve, Nielsen, Kristoffer Vale, Biering, Eirik, and Bergheim, Asbjørn

Subjects
*BRANCHIURA (Crustacea), *ATLANTIC salmon, *FISH productivity, *DRINKING (Physiology), *FISH stocking, *FISH reproduction, *FISH mortality
Abstract

Effective protection against sea lice ( Lepeoptheirus salmonis and Caligus elongatus ) was documented over three years during the production of Atlantic salmon ( Salmo salar ) in floating enclosures with water intake at 25 m depth. Moderate to high sea lice abundance in reference groups in open cages confirmed the presence of infective sea lice copepodites in the surface water around the cages. In the closed cages, sea lice were only recorded after fish had been moved between cages with well boats, or when the cages were stocked with fish transferred from open cages. When fish were exposed to sea lice in the closed cages, the recorded abundance was low and with no signs of sea lice reproduction within the cages. Records of mortality and growth during the test period indicate that production in closed sea cages is possible without adverse effects on survival or growth rates. Statement of relevance This study demonstrates how a new closed confinement technology provided an effective protection against sea lice ( L. salmonis and C. elongatus ), without adverse effects on survival or growth rates. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
View/download PDF

2. Vector potential of the salmon louse Lepeophtheirus salmonis in the transmission of infectious haematopoietic necrosis virus (IHNV).

Author

Jakob, E., Barker, D. E., and Garver, K. A.

Subjects
LEPEOPHTHEIRUS salmonis, INFECTIOUS hematopoietic necrosis virus, SALMON, VIRUSES, LICE, RESERVOIRS
Abstract

The article discusses a study which examined whether Lepeophtheirus salmonis can acquire infectious haemotopoietic necrosis virus (INHV) after water bath exposure and whether Lepeophtheirus salmonis can transmit IHNV to Atlantic salmon Salmo salar. Salmon lice which were bath-exposed to 1x105 plaque-forming units (pfu)/millimeter of IHNV for 1 hour acquired the virus and remained INHV-positive for 12 hours. The study found that the salmon louse acts as a mechanical rather than a biological vector or reservoir.

Published
2011
Full Text
View/download PDF

3. Effective protection against sea lice during the production of Atlantic salmon in floating enclosures

Author

Asbjørn Bergheim, Eirik Biering, Kristoffer Vale Nielsen, and Arve Nilsen

Subjects
0301 basic medicine, Atlantic salmon, media_common.quotation_subject, Lepeophteirus salmonis, 04 agricultural and veterinary sciences, Biology, Test (biology), Aquatic Science, biology.organism_classification, Closed cages, Fishery, 03 medical and health sciences, 030104 developmental biology, Caligus elongatus, parasitic diseases, 040102 fisheries, 0401 agriculture, forestry, and fisheries, %22">Fish , Water intake, Salmo, Reproduction, skin and connective tissue diseases, media_common
Abstract

Effective protection against sea lice ( Lepeoptheirus salmonis and Caligus elongatus ) was documented over three years during the production of Atlantic salmon ( Salmo salar ) in floating enclosures with water intake at 25 m depth. Moderate to high sea lice abundance in reference groups in open cages confirmed the presence of infective sea lice copepodites in the surface water around the cages. In the closed cages, sea lice were only recorded after fish had been moved between cages with well boats, or when the cages were stocked with fish transferred from open cages. When fish were exposed to sea lice in the closed cages, the recorded abundance was low and with no signs of sea lice reproduction within the cages. Records of mortality and growth during the test period indicate that production in closed sea cages is possible without adverse effects on survival or growth rates. Statement of relevance This study demonstrates how a new closed confinement technology provided an effective protection against sea lice ( L. salmonis and C. elongatus ), without adverse effects on survival or growth rates.

Published
2017
Full Text
View/download PDF

4. Effects of salmon lice on sea trout. A litterature review

Author

Thorstad, Eva Bonsak, Todd, Christopher D., Bjørn, Pål Arne, Gargan, Patrick G., Vollset, Knut Wiik, Halttunen, Elina, Kålås, Steinar, Uglem, Ingebrigt, Berg, Marius, and Finstad, Bengt

Subjects
life history, sea trout, literature review, knowledge status, growth, Lepeophteirus salmonis, salmon farming, anadromous salmonid, salmon lice, NINA Rapport, mortality, aquaculture, marine migration, parasite, physiology, population effect, Salmo trutta, infestation, fish farming
Abstract

Thorstad, E.B., Todd, C.D., Bjørn, P.A., Gargan, P.G., Vollset, K.W., Halttunen, E., Kålås, S., Uglem, I., Berg, M. & Finstad, B. 2014. Effects of salmon lice on sea trout. A litterature review. NINA Rapport 1044. 162 s. Salmon lice are external parasites on salmonids in the marine environment. Farmed salmonids also act as hosts for salmon lice; therefore open net cage farms can increase the production of infective larvae in coastal areas. The aim of this report is to review the existing knowledge on the effects of salmon lice on wild sea trout and focuses on reports in the peer-reviewed primary scientific literature. Fro this reason, references to so-called "grey literature" reports has been minimized. The studies reviewed here range from laboratory and field investigations of the effects of salmon lice on individual fish, to analyses of impacts on wild populations. © Norsk institutt for naturforskning. Publikasjonen kan siteres fritt med kildeangivelse.

Published
2014

Catalog

Books, media, physical & digital resources
See catalog results