differences between the european carp (cyprinus carpio carpio) and the coloured carp (cyprinus carpio haematopterus) in susceptibility to thelohanellus nikolskii (myxosporea) infection.thelohanellus nikolskii infection of the common carp (cyprinus carpio l.) has been a common parasitosis in the central european fish farms since the first detection of the parasite about 20 years ago. this parasite, introduced from the far east, causes intensive infection on the fins of fingerlings of the carp subspecies cultured in europe (european carp, cyprinus carpio carpio). this infection of the common carp occurs in the hungarian fish farms every year. until the present study, this parasi ...200212061236
biology and histopathology of thelohanellus nikolskii achmerov, 1955 (myxosporea, myxozoa), a protozoan parasite of the common carp (cyprinus carpio).thelohanellus nikolskii, a myxosporean originating from the far east, arrived in hungary through natural waters from neighbouring countries which it had originally reached because of the introduction of the amur wild carp. t. nikolskii is a specific parasite of carp which produces large cysts on the fins of fry. the cysts usually appear on the fish at the beginning of july, and in august and september cysts containing the mature spores burst. the cysts are easily seen even by the naked eye and a ...19827157940
[the biology and pathogenicity of the carp parasite thelohanellus nikolskii (myxosporidia)].the myxosporidian thelohanellus nikolskii has been recorded in young of carp in fish-breeding ponds of moldavia since 1982. sporogenesis takes place from june to august. single cysts with mature spores are found in winter and spring. the distribution of cysts in the host's population is of overdispersed character. haematological investigation has revealed the threshold level of the invasion when there are observed changes in the blood of infected fishes (8 to 10 cysts per 1 g of fish weight). th ...19902147986
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