Lepeophtheirus salmonis can parasitize other salmonids to varying degrees, including brown trout (sea trout: Salmo trutta), Arctic char (Salvelinus alpinus), and all species of Pacific salmon. Preadult and adult sea lice, especially gravid females, are aggressive feeders, in some cases feeding on blood in addition to tissue and mucus. Bathing fish with hydrogen peroxide (350–500 mg/L for 20 min) will remove mobile sea lice from fish. The sea louse generation time is around 8-9 weeks at 6°C, 6 weeks at 9°C and 4 weeks at 18°C. Marine Institute, n. d. Web. It has been used only sparingly in sea lice control, largely due to concerns that it may affect the moult cycle of non-target crustaceans, although this has not been shown at the concentrations recommended.[56]. 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Newly hatched larvae do not survive below salinities of 15‰ and poor development to the infective copepodid occurs between 20 and 25‰. When exposed in river estuaries containing large numbers of open-net farms, mathematical models have suggested that many young wild salmon may be infected [34][35] Adult salmon may survive otherwise critical numbers of sea lice, but small, thin-skinned juvenile salmon migrating to sea are highly vulnerable. The resistance is likely due to prolonged use of the drug leading to up-regulation of P-glycoprotein,[64] similar to what has been seen in nematode resistance to macrocyclic lactones. [39] Field sampling of copepodids, and hydrographic and population models, show how L. salmonis from farms can cause mass infestations of seaward-migrating salmonids, and this effect can occur up to 30 km (19 mi) from the farms. [14] Several field and modeling studies on L. salmonis have examined copepodid populations and have shown that planktonic stages can be transported tens of kilometres from their source.[12][15][16]. It thus prevents further development of larval stages of sea lice, but has no effect on adults. With exception of a short period during the moult, the preadult and adult stages are mobile on the fish, and in some cases, can move between host fish. Loose , long dresses, big sizes and many different colours... New collection "By the Sea",2020 [13], The ability to activate an inflammatory response is a way to combat salmon lice infection. Once detached, they can be blown by wind across the surface of the sea, like plankton. Sea trout populations in recent years may have seriously declined due to infestation by sea lice,[36] and Krkosek et al. Disturbances in hydro mineral balance can result in negative consequences at the cellular, tissue, and organism levels. 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