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    Ramírez, Raúl Bakke, Tor A. and Harris, Philip D. 2015. Population regulation in Gyrodactylus salaris – Atlantic salmon (Salmo salar L.) interactions: testing the paradigm. Parasites & Vectors, Vol. 8, Issue. 1,
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    OLSTAD, K. SHINN, A. P. BACHMANN, L. and BAKKE, T. A. 2007. Host-based identification is not supported by morphometrics in natural populations of Gyrodactylus salaris and G. thymalli (Platyhelminthes, Monogenea). Parasitology, Vol. 134, Issue. 14,
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    Bakke, T.A. Cable, J. and Harris, P.D. 2007. Advances in Parasitology Volume 64. Vol. 64, Issue. , p. 161.
    Kania, P W Jørgensen, T R and Buchmann, K 2007. Differentiation between a pathogenic and a non-pathogenic form of Gyrodactylus salaris using PCR-RFLP. Journal of Fish Diseases, Vol. 30, Issue. 2, p. 123.
    Makhrov, A. A. and Bolotov, I. N. 2006. Dispersal routes and species identification of freshwater animals in Northern Europe: A review of molecular evidence. Russian Journal of Genetics, Vol. 42, Issue. 10, p. 1101.
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    Shinn, Andrew P. Hansen, Haakon Olstad, Kjetil Bachmann, Lutz and Bakke, Tor A. 2004. The use of morphometric characters to discriminate specimens of laboratory-reared and wild populations of Gyrodactylus salaris and G. thymalli (Monogenea). Folia Parasitologica, Vol. 51, Issue. 2, p. 239.
    Huyse, Tine Malmberg, Göran and Volckaert, Filip A.M. 2004. Four new species of Gyrodactylus von Nordmann, 1832 (Monogenea, Gyrodactylidae) on gobiid fishes: combined DNA and morphological analyses. Systematic Parasitology, Vol. 59, Issue. 2, p. 103.
    Bakke, Tor A. Nilsen, Kariann B. and Shinn, Andrew P. 2004. Chaetotaxy applied to Norwegian Gyrodactylus salaris Malmberg, 1957 (Monogenea) clades and related species from salmonids. Folia Parasitologica, Vol. 51, Issue. 2, p. 253.
    Matejusová, I. and Cunningham, C. O. 2004. THE FIRST COMPLETE MONOGENEAN RIBOSOMAL RNA GENE OPERON: SEQUENCE AND SECONDARY STRUCTURE OF THE GYRODACTYLUS SALARIS MALMBERG, 1957, LARGE SUBUNIT RIBOSOMAL RNA GENE. Journal of Parasitology, Vol. 90, Issue. 1, p. 146.
    Hansen, Haakon Bachmann, Lutz and Bakke, Tor A 2003. Mitochondrial DNA variation of Gyrodactylus spp. (Monogenea, Gyrodactylidae) populations infecting Atlantic salmon, grayling, and rainbow trout in Norway and Sweden. International Journal for Parasitology, Vol. 33, Issue. 13, p. 1471.
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The use of host specificity, pathogenicity, and molecular markers to differentiate between Gyrodactylus salaris Malmberg, 1957 and G. thymalli Zitnan, 1960 (Monogenea: Gyrodactylidae)

  • E. STERUD (a1), T. A. MO (a1), C. M. COLLINS (a2) and C. O. CUNNINGHAM (a2)
Abstract

The validity of Gyrodactylus thymalli has been questioned, based on its morphological and genetic resemblance to G. salaris. This taxonomic problem has practical implications regarding correct diagnosis of G. salaris, which has proved to be highly pathogenic to stocks of wild Norwegian Atlantic salmon. The host specificity and pathogenicity of G. salaris and G. thymalli were experimentally tested on salmon and grayling. Both parasite species were able to infect, live and reproduce on both fish species. G. salaris was highly pathogenic for the experimental stock of salmon, while grayling mounted an effective response against this parasite. Both fish species responded to an infection with G. thymalli. The results did not support the hypothesis of conspecificity between G. thymalli and G. salaris. The ribosomal RNA gene intergenic spacer of both species was sequenced. Variation in sequence was lower than expected for different species. Variation in the sequences of tandemly repeated elements was found and may prove useful in distinguishing G. salaris and G. thymalli.

Copyright
2002 Cambridge University Press
Corresponding author
Corresponding author: National Veterinary Institute, P.O. Box 8156 Dep., N-0033 Oslo, Norway. Tel: +47 22 96 47 13. Fax: +47 22 46 38 77. E-Mail: erik.sterud@vetinst.no
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Parasitology
  • ISSN: 0031-1820
  • EISSN: 1469-8161
  • URL: /core/journals/parasitology
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