Sequence variation in four mitochondrial genes of the salmon louse Lepeophtheirus salmonis
Journal article, Peer reviewed
Permanent lenke
http://hdl.handle.net/11250/108872Utgivelsesdato
2006-03-02Metadata
Vis full innførselSamlinger
- Articles [3089]
Originalversjon
http://dx.doi.org/10.3354/dao068251Sammendrag
A total of 210 Lepeophtheirus salmonis collected from 7 locations (Scotland, Russia,
Canada, Japan and 3 locations in Norway), were screened for sequence variation in 4 mitochondrial
genes; ATPase subunit 6 (A6), Cytochrome b oxidase subunit I (COI ), Cytochrome b (Cyt b) and
16S rRNA. A high level of intraspecific variation was observed within all genes. The majority of polymorphisms
were present in single individuals only, which resulted in a high number of private haplotypes
within each gene. Little evidence of genetic differentiation was observed among the 3 Norwegian
locations or between L. salmonis samples from Norway, Scotland and Russia. Pairwise FST values
indicated that a weak degree of sub-division between L. salmonis sampled in Canada and the Northeast
Atlantic might, however, exist. All samples collected in the Atlantic were highly different from
the Japanese sample. It is suggested that the lack of genetic differentiation among lice samples from
the North Atlantic is a result of extensive gene flow mediated by passive transport of L. salmonis
larvae, and the migratory pattern of its salmonid hosts.