Abstract
Salmon lice-induced mortality of Atlantic salmon during post-smolt migration in Norway
Highlights
Aquaculture, and especially cage-based marine aquaculture, represents a rapidly growing form of global food production
We developed a virtual post-smolt (VPS) model to estimate the marine mortality of wild Atlantic salmon post-smolts resulting from infestation of salmon lice produced on commercial salmon farms
Salmon lice-induced mortality has a negative effect on wild Atlantic salmon post-smolts, and is documented in areas of intensive salmonid aquaculture (Skilbrei et al, 2013; Vollset et al.,2016b)
Summary
Aquaculture, and especially cage-based marine aquaculture, represents a rapidly growing form of global food production. The production of salmonids, which primarily consists of Atlantic salmon (Salmo salar) and to a lesser degree marine-farmed rainbow trout (Oncorhynchus mykiss), was first established in Norway in the early 1970s. Production has increased rapidly, reaching 1.44 million tons in Norway in 2019 (https://www.ssb.no/en/jord-skog-jakt-og-fiskeri/statistikker/fis keoppdrett) and 2.25 million tons globally in 2016 (FAO, 2018). The salmon louse is an ectoparasitic copepod that consists of two allopatric sub-species in the Atlantic and Pacific oceans respectively (Skern-Mauritzen et al, 2014). It is an obligate parasite of anadromous salmonids during the marine phase of the life cycle, feeding on the skin, blood and mucus of its host
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