Abstract
The global trade in live ornamental fish carries with it the potential threat of unwanted movement of pathogens. The live ornamental fish, when released into the natural environment of their destination countries, may disseminate their parasites, threatening local fish and causing economic loss in fish aquaculture. This study was aimed to explain the reasons for deterioration of health and premature death of ornamental fish: Nannostomus spp. from Colombia and Symphysodon spp. Some specimens of Symphysodon aequifasciatus Pellegrin, 1904 were captured from their natural habitats in the Amazon River basin and shipped to Poland by air mail. The hybrids of Symphysodon spp. originated from an aquarium in Poland (shared with S. aequifasciatus). The third discus fish species, Symphysodon discus Heckel, 1840 came from a fish farm in Thailand and represents an Asian breeding line. All the studied fish were infected with pathogens. Nannostomus spp. housed a single parasite species on its skin, namely Artystone minima. This isopod species was not recorded in Poland and probably in Europe before. The examined fish of the genus Symphysodon yielded 13 pathogens. Five of them Philodina sp., Ichthyobodo necator, Hexamita symphysodonis, Sciadicleithrum variabilum and Eustrongylides sp. were not earlier recorded in this host species in Poland. The findings of Ichthyophonus hoferi and Myxobolus sp. are new host records for Symphysodon spp. fish. Hybrid fish and S. aequifasciatus are reported here as hosts of Entamoeba sp. for the first time.References
Antychowicz J. 2003. Zakaźne choroby tropikalnych ryb akwariowych [Infectious diseases of aquarian tropical fish]. Państwowy Instytut Weterynaryjny, Puławy (in Polish).
Bassleer G. 2003. The new illustrated guide to fish diseases in ornamental tropical and pond fish. Westmeerbeek, Bassleer Biofish, Belgium.
Bauer O. N. 1987. Opredelitel´ parasitov presnovodnykh ryb fauny SSSR [Key for parasite determination of freshwater fish fauna USSR.]. Isdatel´stvo Nauka, Leningrad (in Russian).
Békési L., Csaba S., Molnár K. 2002. Recent information on the Myxosporean (Myxozoa) fish parasites: an alternate stage of the parasites in Brasil. Braz. J. Vet. Res. An. Sci. 39: 271-276.
Boeger W. A., Piaseck i W., Sobeck a E. 2002. Neotropical Monogenoidea. 44. Mymarotheciumviatorum sp.n. (Ancyrocephalinae) from the gills of Piaractus brachypomus (Serasalmidae, teleostei) captured in a warm-water canal of a power plant in Szczecin, Poland. Acta Ichthyol. Piscat. 32: 157-161.
Crampton W. G. 2008. Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae). Neotrop. Ichthyol. 6: 599-612.
Eiras J. C., Molnár K., Lu Y. S. 2005. Synopsis of the species of Myxobolus Bütchli, 1882 (Myxozoa: Myxosporea: Myxobolidae). Syst. Parasitol. 61: 1-46.
Fenner B. A. 2010. Diversity of aquatic life: the cichlid fishes called discus. Available at http://www.wetwebmedia.com/FWsubwebindex/discusfish.htm; accesed 1 Jan. 2011.
Froese R., Pauly D. 2010. FishBase. World Wide Web electronic publication. Available at www. fishbase.org; accessed 3 Oct. 2010.
Guz L., Szczepaniak K. 2009. Intestinal amoebiasis in Heckel discus Symphysodon discus - a case report. B. Eur. Assoc. Fish. Pat. 29: 28-33.
Kritsky D. C., Thatcher V. E., Boeger W. A. 1989. Neotropical Monogenoidea 15. Dactylogyrids from the gill of Brazilian Cichlidae with proposal of Sciadicleithrum gen. n. (Dactylogyridae). Proc. Helminthol. Soc. Wash. 56: 128-140.
Lom J., Dykova I. 1992. Protozoan parasites of fishes. Developments in aquaculture and fisheries science. Elsevier, Amsterdam.
May L. 1989. Epizootic and parasitic rotifers. Hydrobiologia 186/187: 59-67.
Mizelle J. D., Kritsky D. C. 1969. Studies on monogenetic trematodes. XXXIX. Exotic species of Monopisthocotylea with the proposal of Archidiplectanum gen. n. and Longihaptor gen. n. Am. Midl. Nat. 81: 370-386.
Moravec F., Leopresert T. 2008. Redescription of Ichthyouris bursata Morawec and Prouza, 1995 (Nematoda: Pharyngodonidae), a parasite of wild and aquarium-reared discus Symphysodon spp. (Osteichthes). Syst. Parasitol. 71: 137-143, DOI:10.1007/s11230-008-9144-8.
Moravec F. 1998. Nematodes of freshwater fishes of the Neotropical region. Academia Press, Prague.
Ousman A., Bilong C. F., Njine T., Fomena A. 2007. Structure and dynamics of myxosporean parasites component communities in two freshwater cichlid in the Chari River (Republic of Chad). Pakistan J. Biol. Sci. 10: 692-700.
Ricc i C., Melone G. 2000. Key to the identification of the genera of bdelloid rotifers. Hydrobiologia 418: 73-80.
Roberts H. E., Palmeiro B., Weber E. S. III. 2009. Bacterial and Parasitic Diseases of Pet Fish Veterinary Clinics of North America. Exot. Anim. Pract. 12: 609-638.
Řehulková E., Gelnar M. 2006. Monogenea of freshwater aquarium fishes in the Czech Republic - current state and prospects. In: IX Czech Ichthyological Conference, (Ing. Blanka Vykusová, CSc.), May 4-5 2006, Vodňany, Czech Republic, pp. 142-144, VÚRH JU Vodňany: Martin Kreuz Tiskárna Public.
Sands D. 1988. A fishkeeper’s guide to South American catfishes. Tetra Press, New York.
Sieniawski A. 2006. Zdrowe dyskowce [Healthy discus fish]. Vol. 2. Galaktyka, Poland (in Polish).
Stoskopf M. K. 1993. Fish medicine. W.B. Saunders Company, Philadelphia. Thatcher V. E. 2000. The isopod parasites of South American fishes. In: Metazoan parasites in the Neotropics: a systematic and ecological perspective (Salgado-Maldonado G., Garcia Aldrete A. N., Vidal-Martinez V. M., Eds.), pp. 193-226. Instituto de Biologia, Universidad Nacional Autónomia de México.
Thatcher V. E. 2006. Aquatic biodiversity in Latin America. Vol. 1. Amazon fish parasites. 2nd Edition. Pensoft Publishers, Sofia-Moscow.
Thatcher V. E., Carvalho M. L. 1988. Artystone minima n. sp. (Isopoda, Cymothoidae) a body cavity parasite of the pencil fish (Nannostomus beckfordi Guenther) from the Brasilian Amazon. Amazoniana 10: 255-265.
Więcaszek B., Keszka S., Sobeck a E., Boeger W. A. 2009. Asian pangasiids - an emerging problem for European inland waters? Acta. Ichthyol. Piscat. 39: 131-138. doi:10.3750/ AIP2009.39.2.08.
Wiszniewski J. 1946. Sur un rotifere, parasite des carpes. Zool. Polon. 4: 7-10.
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