Analysis of ribosomal RNA intergenic spacer (IGS) sequences in species and populations of Gyrodactylus (Platyhelminthes: Monogenea) from salmonid fish in Northern Europe.

@article{Cunningham2003AnalysisOR,
  title={Analysis of ribosomal RNA intergenic spacer (IGS) sequences in species and populations of Gyrodactylus (Platyhelminthes: Monogenea) from salmonid fish in Northern Europe.},
  author={Carey O. Cunningham and Catherine M. Collins and G{\"o}ran Malmberg and Tor Atle Mo},
  journal={Diseases of aquatic organisms},
  year={2003},
  volume={57 3},
  pages={
          237-46
        }
}
The intergenic spacer (IGS) region of ribosomal RNA genes was amplified and sequenced from a variety of Gyrodactylus specimens collected from wild and farmed Atlantic salmon Salmo salar, rainbow trout Oncorhynchus mykiss, and grayling Thymallus thymallus, from various locations in Northern Europe. Phylogenetic analysis of the sequences confirmed the distinction between G. salaris Malmberg, 1957 and G. thymalli Zitnan, 1960, supporting their validity as separate species. G. salaris adapted to… 
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The incongruence of nuclear and mitochondrial DNA variation supports conspecificity of the monogenean parasites Gyrodactylus salaris and G. thymalli
TLDR
The hypothesis that parasites on rainbow trout represent hybrids of both species is rejected and the IGS data is interpreted as support for G. salaris and G. thymalli being a single species.
The mitochondrial genome of Gyrodactylus salaris (Platyhelminthes: Monogenea), a pathogen of Atlantic salmon (Salmo salar)
TLDR
The complete mitochondrial (mt) genome of the Atlantic salmon parasite Gyrodactylus salaris is described, the first for any monogenean species and offers the opportunity of defining new molecular markers for studying evolutionary relationships within and among gyrodACTylid species.
Mitochondrial haplotype diversity of Gyrodactylus thymalli (Platyhelminthes; Monogenea): extended geographic sampling in United Kingdom, Poland, and Norway reveals further lineages
TLDR
It is concluded that G. thymalli established in the UK along with the immigration of grayling, and six new mitochondrial haplotypes of G.Thymalli from England, Poland, and Norway detected by sequencing 745 bp of the cytochrome oxidase I gene are reported.
Molecular phylogeny of Gyrodactylus (Monogenea) parasitizing fishes in fresh water, estuarine, and marine habitats in Canada
TLDR
Significant molecular groups in North American Gyro- dactylus were found to correspond to a major division in the genus based on the structure of the male copulatory organ, corroborate earlier findings suggesting that the genus Fundulotrema Kritsky and Thatcher, 1977, traditionally thought to be distinct from Gyrodactsylus owing to the presence of a peduncular bar, falls within GyrodACTylus.
MicroRNA loci support conspecificity of Gyrodactylus salaris and Gyrodactylus thymalli (Platyhelminthes: Monogenea).
Escape from an evolutionary dead end: a triploid clone of Gyrodactylus salaris is able to revert to sex and switch host (Platyhelminthes, Monogenea, Gyrodactylidae).
TLDR
The triploid parthenogenetic RBT clone had produced diploid oocytes, when (as a female) stimulated by a non-self mate in the new environment, which coincided with a switch to the salmon host.
Clonal Structure of Salmon Parasite Gyrodactylus salaris on a Coevolutionary Gradient on Fennoscandian Salmon (Salmo salar)
TLDR
The prevalence and clonal structuring of G. salaris were concordant with the host resistance predicted from the suggested 132 000 years of common phylogeographic history in the Baltic refugia, suggesting competitive interactions via host defense.
Arctic charr (Salvelinus alpinus) is a suitable host for Gyrodactylus salaris (Monogenea, Gyrodactylidae) in Norway
TLDR
Molecular markers and morphometrics revealed significant differences between G. salaris infecting charr in the 2 localities, and between those on sympatric charr and salmon within Signaldalselva, which may reflect adaptations to a new host species, different environmental conditions, and/or inherited differences between the G.salaris strains.
Revision of Gyrodactylus salaris phylogeny inspired by new evidence for Eemian crossing between lineages living on grayling in Baltic and White sea basins
TLDR
This work suggests an overall revision of G. salaris phylogeny and attempts at precisely drawing the division of lineages within this polytypic species as well as proposes unification in nomenclature for its strains.
Genetisk analyse av opprinnelsen til Gyrodactylus salaris-infeksjonen på laksunger i Lærdalselva
TLDR
The main purpose of this investigation was to look at the relationship between the parasites found in the river Lærdalselva and the RBT-clone and other strains of G. salaris, and suggests that also the parasites in Oslo fjord populations are most probably similar or parallel recombinants.
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