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dc.contributor.authorSkern-Mauritzen, Rasmuseng
dc.contributor.authorTorrissen, Oleeng
dc.contributor.authorGlover, Kevineng
dc.date.accessioned2014-09-24T13:39:23Z
dc.date.available2014-09-24T13:39:23Z
dc.date.issued2014-03-14eng
dc.identifier.issn1471-2156en_US
dc.identifier.urihttp://hdl.handle.net/1956/8560
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.en_US
dc.language.isoengeng
dc.publisherBioMed Centralen_US
dc.rightsAttribution CC BYeng
dc.rights.urihttps://creativecommons.org/licenses/by/2.0/eng
dc.subjectHybrid fitnesseng
dc.subjectCOIeng
dc.subjectSubspecieseng
dc.subjectSea liceeng
dc.subjectSalmon louseeng
dc.subjectReproductioneng
dc.subjectCopepodidseng
dc.subjectPhylogeneticseng
dc.titlePacific and Atlantic Lepeophtheirus salmonis (Krøyer, 1838) are allopatric subspecies: Lepeophtheirus salmonis salmonis and L. salmonis oncorhynchi subspecies novoen_US
dc.typePeer reviewed
dc.typeJournal article
dc.date.updated2014-04-17T05:01:36Z
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2014 Skern-Mauritzen et al.en_US
dc.source.articlenumber32
dc.identifier.doihttps://doi.org/10.1186/1471-2156-15-32
dc.identifier.cristin1161711
dc.source.journalBMC Genetics
dc.source.4015


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