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dc.contributor.authorSkern-Mauritzen, Rasmus
dc.contributor.authorTorrissen, Ole
dc.contributor.authorGlover, Kevin
dc.identifier.citationBMC Genetics 2014, 15:32eng
dc.description.abstractBackground: The salmon louse Lepeophtheirus salmonis is a parasitic copepod that infects salmonids in the Pacific and Atlantic oceans. Although considered as a single species, morphological and biological differences have been reported between lice from the two oceans. Likewise, studies based on nucleotide sequencing have demonstrated that sequence differences between Atlantic and Pacific L. salmonis are highly significant, albeit smaller than the divergence observed between congeneric copepod species. Results: We demonstrated reproductive compatibility between L. salmonis from the two oceans and successfully established F2 hybrid strains using separate maternal lines from both the Pacific and Atlantic. The infection success for the F2 hybrid strains were similar to results typically observed for non hybrid lice strains in the rearing facility used. Lepeophtheirus salmonis COI and 16S sequences divergence between individuals from the Pacific and the Atlantic oceans was high compared to what may be expected within a copepod species and phylogenetic analysis showed that they consistently formed monophyletic clades representing their origin from the Pacific or Atlantic oceans. Conclusions: Lepeophtheirus salmonis from the Pacific and Atlantic oceans are reproductively compatible at least until adults at the F2 hybrid stage, and should not be regarded as separate species based on reproductive segregation or sequence divergence levels. Reported biological and genetic differences in L. salmonis seen in conjunction with the reported genetic diversity commonly observed between and within species demonstrate that Atlantic and Pacific L. salmonis should be regarded as two subspecies: Lepeophtheirus salmonis salmonis and L. salmonis oncorhynchi subsp. nov.eng
dc.publisherBioMed Centraleng
dc.rightsAttribution CC BY 2.0eng
dc.titlePacific and Atlantic Lepeophtheirus salmonis (Krøyer, 1838) are allopatric subspecies: Lepeophtheirus salmonis salmonis and L. salmonis oncorhynchi subspecies novoeng
dc.typeJournal articleeng
dc.subject.nsiVDP::Landbruks- og fiskerifag: 900::Fiskerifag: 920::Fiskehelse : 923
dc.subject.nsiVDP::Agriculture and fisheries science: 900::Fisheries science: 920::Fish health: 923
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Parasittologi: 484
dc.subject.nsiVDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Parasitology: 484
bora.peerreviewedPeer reviewedeng
dc.type.documentJournal article
noa.nsiVDP::Matematikk og Naturvitenskap: 400eng
noa.nsiVDP::Landbruks- og Fiskerifag: 900eng

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Attribution CC BY 2.0
Except where otherwise noted, this item's license is described as Attribution CC BY 2.0