Abstract
Pomphorhynchus laevis is believed on ecological evidence to exist as three strains in the British Isles. However, the strains have never been shown to be capable of being distinguished using morphological characters. A morphological comparison was made between a sample of P. laevis from Salmo trutta in L. Feeagh in the west of Ireland and a sample from Leuciscus cephalus in R. Culm in the south of England. The length and width of the trunk, neck, bulb, proboscis and hooks were measured. The number of hooks per row, the number of rows and the positions of the stoutest and longest hooks were also recorded. A Principal Components Analysis based on the morphological measurements confirmed the separation of the two populations and showed that two characters successfully identified the populations: the position of the stoutest hook and the ratio of numbers of anterior to posterior hooks.
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References
Amin, O.M. (1975) Variability in Acanthocephalus parksideiAmin, 1974 (Acanthocephala: Echinorhynchidae). Journal of Parasito-logy, 61, 307–317.
Amin, O.M. & Dailey, M.D. (1998) Description of Mediorhynchus papillosus(Acanthocephala: Gigantorhynchidae) from a Color-ado, U.S.A., population, with a discussion of morphology and geographical variability. Journal of the Helminthological Society of Washington, 65,189–200.
Brown, A.F. (1987) Anatomical variability and secondary sexual characteristics in Pomphorhynchus laevis(Müller, 1776) (Acanthocephala). Systematic Parasitology, 9, 213–219.
Brown, A.F., Chubb, J.C. & Veltkamp, C.J. (1986) A key to the species of Acanthocephala parasitic in British freshwater fishes. Journal of Fish Biology, 28, 327–334.
Buckner, S.C. & Nickol, B.B. (1975) Morphological variation of Moniliformis moniliformis(Bremser 1811) Travassos 1915 and Moniliformis clarki(Ward 1917) Chandler 1921. Journal of Parasitology, 61, 996–998.
Bullock, W.L. (1962) A new species of Acanthocephalusfrom New England fishes, with observations on variability. Journal of Parasitology, 48, 442–451.
Byrne, C.J. (2000) The parasite community structure of stocked and wild browntrout (Salmo trutta L.). PhD Thesis, Trinity College, University of Dublin.
Byrne, C.J., Holland, C.V., Poole, R. & Kennedy, C.R. (2002) Com-parison of the macroparasite communities of wild and stocked brown trout (Salmo truttaL.) in the west of Ireland. Parasitology, 124, 435–445.
Duncan, L.W., Inserra, R.N., Thomas, W.K., Dunn, D., Mustika, I., Frisse, L.M., Mendes, M.L., Morris, K. & Kaplan, D.T. (1999) Molecular and morphological analysis of isolates of Pratylenchus coffeaeand closely related species. Nematropica, 29, 61–80.
Gleason, L.N. & Huffman, D.G. (1981) Meristogram analysis of a collection of Pomphorhynchus bulbocollifrom South-Central Kentucky. Journal of Parasitology, 67, 133–134.
Guillen-Hernandez, S. & Whitfield, P.J. (2001) A comparison of freshwater and marine/estuarine strains of Pomphorhynchus laevisoccurring sympatrically in flounder, Platichthys flesus,in the tidal Thames. Journal of Helminthology, 75, 237–243.
Hine, P.M. & Kennedy, C.R. (1974) Observations on the dis-tribution, specificity and pathogenicity of the acanthocephalan Pomphorhynchus laevis(Müller). Journal of Fish Biology,6, 521–535.
Hobbs, R.P., Lymbery, A.J. & Thompson, R.C.A. (1990) Ros-tellar hook morphology of Echinococcus granulosus(Batsch, 1786) from natural and experimental Australian hosts, and its implications for strain recognition. Parasitology, 101, 273–281.
Holland, C.V. & Kennedy, C.R. (1997) A checklist of parasitic hel-minth and crustacean species recorded in freshwater fish from Ireland. Biology and Environment, 97, 225–243.
Huffman, D.G. & Bullock, W.L. (1975) Meristograms: graphical analysis of serial variation of proboscis hooks of Echinorhynchus(Acanthocephala). Systematic Zoology, 24, 333–345.
Huffman. D.G. & Nickol, B.B. (1978) Meristogram analysis of the acanthocephalan genus Pomphorhynchusin North America. Journal of Parasitology, 64, 851–859.
Jacquiet, P., Humbert, J.F., Comes, A.M., Cabaret, J., Thiam, A. & Cheikh, D. (1995) Ecological, morphological and genetic char-acterisation of sympatric Haemonchusspp. parasites of domestic ruminants in Mauritania. Parasitology, 110, 483–492.
Kennedy, C.R. (1974) A checklist of British and Irish freshwater fish parasites with notes on their distribution. Journal of Fish Biology, 6, 613–644.
Kennedy, C.R. (1984) The status of flounders, Platichthys flesusL., as hosts of the acanthocephalan Pomphorhynchus laevis(Müller) and its survival in marine conditions. Journal of Fish Biology, 24, 135–149.
Kennedy, C.R., Bates, R.M. & Brown, A.F. (1989) Discontinu-ous distributions of the fish acanthocephalans Pomphorhynchus laevisand Acanthocephalus anguillaein Britain and Ireland: an hypothesis. Journal of Fish Biology, 34, 607–619.
Kennedy, C.R., Broughton, P.F. & Hine, P.M. (1976) The sites occupied by the acanthocephalan Pomphorhynchus laevisin the alimentary canal of fish. Parasitology, 72, 195–206.
Kennedy, C.R., Broughton, P.F. & Hine, P.M. (1978) The status of brown and rainbow trout, Salmo truttaand Salmo gairdnerias hosts of the acanthocephalan Pomphorhynchus laevis. Journal of Fish Biology, 13, 265–275.
Lymbery, A.J. (1998) Combining data from morphological traits and genetic markers to determine transmission cycles in the tape-worm, Echinococcus granulosus. Parasitology, 117, 185–192.
Molloy, S., Holland, C. & O'Regan, M. (1995) Population biology of Pomphorhynchus laevisin brown trout from two lakes in the west of Ireland. Journal of Helminthology, 69, 229–235.
O'Mahony, E.M., Bradley, D.G., Kennedy, C.R. & Holland, C.V. (in press) Evidence for the hypothesis of strain formation in Pom-.157 phorhynchus laevis(Acanthocephala): an investigation using mitochondrial DNA sequences. Parasitology.
Petrochenko, V.I. (1956) [ Acanthocephala of domestic and wild animals.] Vol. I. Izdatel'stvo Akademii Nauk SSSR, Moskva. (In Russian: Translated by the Israel Program for Scientific Translations, Jerusalem, 1971 464 pp.)
Ponce Gordo, F. & Cuesta Bandera, C. (1997) Differentiation of Spanish strains of Echinococcus granulosususing larval rostellar hook morphometry. International Journal for Parasitology, 27, 41–49.
Samuel, N., Nickol, B.B. & Mayes M.A. (1976) Acanthocephala of Nebraska fishes. The American Midland Naturalist, 96, 391–406.
Wayland, M.T., Gibson, D.I. & Sommerville, C. (2004) Echin-orhynchus salmonisMüller, 1784 (Acanthocephala: Echino-rhynchidae) from the Bothnian Bay, Baltic Sea: morphological variability and radial asymmetry of proboscis hooks. Systematic Parasitology, in press.
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O'Mahony, E., Kennedy, C. & Holland, C. Comparison of morphological characters in Irish and English populations of the acanthocephalan Pomphorhynchus laevis (Müller, 1776). Syst Parasitol 59, 147–157 (2004). https://doi.org/10.1023/B:SYPA.0000044431.21210.f3
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DOI: https://doi.org/10.1023/B:SYPA.0000044431.21210.f3