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dc.contributor.authorDempster, Tim
dc.contributor.authorOverton, Kathy
dc.contributor.authorBui, Samantha
dc.contributor.authorStien, Lars Helge
dc.contributor.authorOppedal, Frode
dc.contributor.authorKarlsen, Ørjan
dc.contributor.authorCoates, Andrew
dc.contributor.authorPhillips, B. L.
dc.contributor.authorBarrett, Luke T.
dc.date.accessioned2021-08-17T09:48:06Z
dc.date.available2021-08-17T09:48:06Z
dc.date.created2021-08-11T11:28:43Z
dc.date.issued2021
dc.identifier.citationAquaculture Environment Interactions. 2021, 13 237-248.en_US
dc.identifier.issn1869-215X
dc.identifier.urihttps://hdl.handle.net/11250/2768751
dc.description.abstractSea cage fish farming is typically open to the environment, with disease transmission possible between farmed and wild hosts. In salmonid aquaculture, salmon louse Lepeophtheirus salmonis infestations cause production losses, reduce welfare for farmed fish and increase infestation rates for wild fish populations. The high density of hosts in farms likely also shifts the coevolutionary arms race between host and parasite, with ecological and evolutionary consequences for the salmon louse. Using farm-reported salmon and louse abundances and publicly reported estimates of wild salmonid host abundances and the salmon lice they carry, we estimated (1) the relative abundance of farmed and wild salmonid hosts and (2) the relative importance of each for the abundance of salmon lice for the coastal zone of Norway from 1998 to 2017. Farmed hosts increased in importance over time with the expansion of the industry. From 2013 to 2017, farmed salmonids outnumbered wild salmonids by 267-281:1. By 2017, farmed salmonids accounted for 99.6% of available hosts and produced 99.1% of adult female salmon lice and 97.6% of mated (ovigerous) adult female salmon lice in Norwegian coastal waters. The persistent dominance of farmed hosts has clear implications: (1) management decisions that aim to limit lice abundance can be guided by lice data from farms alone, as lice on wild salmonids make a trivial contribution to the national lice population; and (2) strategies to prevent or treat lice infestations are vulnerable to the evolution of resistance, as the pool of wild hosts is inconsequential and will not act as a refuge large enough to stem the evolution of resistance. As the Norwegian salmon industry expands and salmon lice infestations continue, farmed salmon will drive the ecology and evolution of salmon lice.en_US
dc.language.isoengen_US
dc.titleFarmed salmonids drive the abundance, ecology and evolution of parasitic salmon lice in Norwayen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber237-248en_US
dc.source.volume13en_US
dc.source.journalAquaculture Environment Interactionsen_US
dc.identifier.doi10.3354/aei00402
dc.identifier.cristin1925281
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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