Abstract
Pleistophora finisterrensis n. sp. is a microsporidian parasite of the hypoaxial musculature of the blue whiting Micromesistius poutassou (Risso). Foci of infection are between 3 and 6 mm in length and have no evident effects on adjacent muscle fibres. We found only a single type of spore (uninucleate, with mean dimensions of 4×2 µm in fresh preparations), contained within sporophorous vesicles (mean diameter 19 µm in fresh preparations; 150–250 spores per vesicle). All of the development stages of this microsporidian are monokaryotic. The meronts are initially uninucleate and bounded by a plasmalemma. Towards the end of merogony, meronts are multinucleate plasmodia with a well-defined surface coat. Sporogony is polysporous, with multinucleate sporonts, which likewise have a well-defined surface coat (about 130 nm thick), dividing by plasmotomy to give rise to uninucleate sporoblasts. The polar tube is isofilar and consists of 8–9 turns in the posterior half of spore. The polaroplast is made up of an anterior lamellar part and a posterior vesicular part.
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References
Bosanquet, W.C. (1910) Brief notes on two myxosporidian organisms (Pleistophora hippoglossoideos n. sp. and Myxidium mackiei n. sp.). Zoologischer Anzeiger, 35, 434–438.
Canning, E.U. & Hazard, E.I. (1982) Genus Pleistophora Gurley, 1893: an assemblage of at least three genera. Journal of Protozoology 29, 39–49.
Canning, E.U., Hazard, E.I. & Nicholas, J.P. (1979) Light and electron microscopy of Pleistophora sp. from skeletal muscle of Blennius pholis. Protistologica, 15, 317–332.
Canning, E.U., Hazard, E.I. & Nicholas, J.P. (1980) Genus Pleistophora (Phylum Microspora): redescription of the type species, Pleistophora typicalis Gurley. 1893 and ultrastructural characterization of the genus. Journal of Fish Diseases, 3, 317–338
Canning, E.U. & Lom, J. (1986) The Microsporidia of vertebrates. London: Academic Press, 289 pp.
Canning, E.U. & Nicholas, J.P. (1980) Genus Pleistophora (Phylum Microspora): redescription of the type-species, Pleistophora typicalis Gurley, 1893 and ultrastructural characterisation of the genus. Journal of Fish Diseases, 3, 317–328.
Delphy, M.J. (1916) Scoliose abdominale chez le Mugil auratus Risso et presénce d'une myxosporidie parasite de ce poisson. Comptes Rendus de l'Academie des Sciences (Paris), 163, 71–73.
Estévez, J., Iglesias, R., Leiro, J., Ubeira, F.M. & Sanmartin, M.L. (1992) An unusual site of infection by a microsporean in the turbot Scophthalmus maximus. Diseases of Aquatic Organisms, 13, 139–142.
Fischthal, J.H. (1944) Observations on a sporozoan parasite of the eelpout, Zoarces anguillaris, with an evaluation of candling methods for its detection. Journal of Protozoology 30, 35–36.
Gaevskaya, A.V. & Kovaleva, A.A. (1975) Diseases of commercial fishes in the Atlantic Ocean. Kaliningrad: Kaliningradskoe Knizhnoe Idatelstvo, 124 pp. (In Russian).
Grabda, J. (1978). Studies on parasitic infestation of blue whiting (Micromesistius sp.) with respect to the fish utilization for consumption. Acta Ichthyologica et Piscatoria, 8, 29–38.
Gurley, R.R. (1893). Classification of the Myxosporidia, a group of protozoan parasites infecting fishes. Bulletin of the United States Fisheries Commission, 11, 407–420.
Lom, J. & Corliss, J.O. (1967) Ultrastructural observations on the development of the microsporidian parasite Pleistophora hyphessobryconis Schäperclaus. Journal of Protozoology, 14, 141–152.
Lom, J., Gaevskaya, A.V. & Dyková, I. (1980) Two microsporidian parasites found in marine fishes in the Atlantic Ocean. Folia Parasitologica, 27, 197–202.
Loubès, C., Maurand, J., Gasc, C. De Buron. I. & Barral, J. (1984) Etude ultrastructurale de Loma dimorpha n. sp., microsporidie parasite de poissons Gobiidae languedociens Protistologica, 4, 579–589.
MacKenzie, K. (1979) Some parasites and diseases of blue whiting, Micromesistius poutassou (Risso), to the north and west of Scotland and the Faroe Islands. Scottish Fisheries Research Reports, 17, 1–14
Matthews, R.A. & Matthews, B.F. (1980) Cell and tissue reactions of turbot Scophthalmus maximus L. to Tetramicra brevifilum gen. n., sp. n. Journal of Fish Diseases, 3, 495–515.
McVicar, A.H. (1975) Infection of plaice Pleuronectes platessa L. with Glugea (Nosema) stephani (Hagenmüller 1899) (Protozoa: Microsporidia) in a fish farm and under experimental conditions. Journal of Fish Biology, 7, 611–619.
Morrison, C.M. & Sprague, V. (1981a) Electron microscopical study of a new genus and new species of microsporidia in the gills of Atlantic cod Gadus morhua L. Journal of Fish Diseases, 4, 15–32.
Morrison, C.M. & Sprague, V. (1981b) Light and electron microscopic study of microsporidia in the gill of haddock, Melanogrammus aeglefinus (L.). Journal of Fish Diseases, 4, 179–184.
Morrison, C.M., Marryatt, V. & Gray, B. (1984) Structure of Pleistophora hippoglossoides Bosanquet in the American plaice Hippoglossoides platessoides (Fabricius). The Journal of Parasitology, 70, 412–421.
Nigrelli, R.F. (1946) Parasites and diseases of the ocean pout, Macrozoarces americanus. Bulletin Bingham Oceanographic Collection Yale University, 9, 187–202.
Polyansky, Yu.I. (1955) Additions to parasitology of fishes of northern seas of the U.S.S.R. Parasites of Barents Sea fishes. Trudy Zoologicheskogo Instituta Akademiya Nauk SSSR, 19, 5–170 (In Russian).
Polyansky, Yu.I. & Kutemina, I.V. (1963) The parasite fauna of young cods from the Barents Sea. Vestnik Leningrad Universiteta, (15), Seriya Biologiya (3) pp. 12–21 (In Russian).
Pulsford, A. & Matthews, R.A. (1991) Macrophages and giant cells associated with a microsporidian parasite causing liquefaction of the skeletal muscle of the Norway pout, Trisopterus esmarkii (Nilsson). Journal of Fish Diseases, 14, 67–78.
Ralphs, J.R. & Matthews, R.A. (1986) Hepatic microsporidiosis due to Microgemma hepaticus n.g., n. sp., in juvenile grey mullet Chelon labrosus. Journal of Fish Diseases, 9, 225–242.
Sandholzer, L.A., Nostrand, T. & Young, L. (1945) Studies of an Ichthyosporidian-like parasite of ocean pout (Zoarces anguillaris). Special Scientific Report of United States Fish and Wildlife Service, 31, 1–12.
Shulman, S.S. (1962) Protozoa. In: Bykhovskaya-Pavlovskaya, B. et al. (Eds) [Key to the parasites of freshwater fish of the USSR] Moscow-Leningrad: Izdatel'stvo Akademii Nauk SSR, pp. 7–197 (In Russian; English translation, 1965, Jerusalem, IPST).
Sprague, V., Becnel, J.J. & Hazard, E.I. (1992) Taxonomy of Phylum Microspora. Critical Reviews in Microbiology, 18, 285–395.
Sweeney, A.W., Hazard, E.I. & Graham, M.F. (1985). Intermediate host for an Amblyospora sp. (Microspora) infecting the mosquito Culex annulirostris. Journal of Invertebrate Pathology, 46, 98–102.
Thélohan, P. (1891) Sur deux sporozoaires nouveaux, parasites des muscles des poissons. Comptes Rendus de l'Academie des Sciences, 112, 168–171.
Thélohan, P. (1892) Observations sur les Myxosporidies et essai de classification de ces organismes. Bulletin de la Société Philomatique Paris, 4, 165–178.
Thélohan, P. (1985) Recherches sur les Myxosporidies. Bulletin Scientifique de la France et de la Belgique, 26, 100–394.
Wolf, K. (1984). Introduction, Pisces. In: Kinne, O. (Ed.) Diseases of marine animals Hamburg: Biologische Anstalt Helgoland, Vol. 4 (Part 1), pp. 17–115.
Young, P.C. (1969) Parasitic cutaneous lesions in a cod (Gadus morhua L). Veterinary Record, 84, 99–100.
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Leiro, J., Ortega, M., Iglesias, R. et al. Pleistophora finisterrensis n. sp., a microsporidian parasite of blue whiting Micromesistius poutassou . Syst Parasitol 34, 163–170 (1996). https://doi.org/10.1007/BF00009384
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DOI: https://doi.org/10.1007/BF00009384