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There has been some research on the problems caused by this species in aquaculture, but little is known about the salmon louse's life in nature. It has been shown, however, that salmon louse infections in fish farming facilities can cause epizootics in wild fish.
The life cycle consists of 8 stages, with ecdysis in between. The first two stages are free swimming nauplius I and II, where it has a length between 0.54 and 0.85 mm. The third stage is the copepodit stage, in which the length is ca. 0.7 mm, and the salmon louse attaches itself to the fish. Stages IV and V are the chalimus stages. The salmon louse eats from the fish, and grows to a length of 5 mm for the males, 10 mm for the females. Each generation takes about six weeks at a temperature of 10–12 °C (50–54 °F). In the pre-adult and adult stages (stage VI to IIX), the sea louse is now mobile, and it becomes possible to differentiate males and females.
The thorax is broad and shield shaped. The abdomen is narrower, and in the females, filled with eggs. The females also have two long egg strings attached to the abdomen. The salmon louse uses its feet to move around on the host or to swim from one host to another.
- Geoff Boxshall (2013). "Lepeophtheirus salmonis (Krøyer, 1837)". In T. C. Walter & G. Boxshall. World Copepoda database. World Register of Marine Species. Retrieved October 8, 2013.
- Christiane Eichner, Petter Frost, Bjarte Dysvik, Inge Jonassen, Bjørn Kristiansen & Frank Nilsen (2008). "Salmon louse (Lepeophtheirus salmonis) transcriptomes during post molting maturation and egg production, revealed using EST-sequencing and microarray analysis". BMC Genomics 9: 126. doi:10.1186/1471-2164-9-126. PMC 2329643. PMID 18331648.
- Martin Krkošek, Jennifer S. Ford, Alexandra Morton, Subhash Lele, Ransom A. Myers & Mark A. Lewis (2007). "Declining wild salmon populations in relation to parasites from farm salmon" (PDF). Science 318 (5857): 1772–1775. doi:10.1126/science.1148744. PMID 18079401.
- Lars A. Hamre, Christiane Eichner, Christopher Marlowe A. Caipang, Sussie T. Dalvin, James E. Bron, Frank Nilsen, Geoff Boxshall & Rasmus Skern-Mauritzen (2013). "The salmon louse Lepeophtheirus salmonis (Copepoda: Caligidae) life cycle has only two chalimus stages". PLoS One 8 (9): e73539. doi:10.1371/journal.pone.0073539. PMC 3772071. PMID 24069203.
- "Lakselus: generell biologi" (in Norwegian). Havforskningsinstituttet. Retrieved August 3, 2011.
- "Lepeophtheirus salmonis". Universität Würzburg. Archived from the original on June 27, 2009.