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Notes on Ichthyophthirius multifiliis, a Ciliate Parasitic on Fresh-Water Fishes, with Some Remarks on Possible Physiological Races and Species

Ross F. Nigrelli, Kathryn S. Pokorny and George D. Ruggieri
Transactions of the American Microscopical Society
Vol. 95, No. 4 (Oct., 1976), pp. 607-613
Published by: Wiley on behalf of American Microscopical Society
DOI: 10.2307/3225383
Stable URL: http://www.jstor.org/stable/3225383
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Notes on Ichthyophthirius multifiliis, a Ciliate Parasitic on Fresh-Water Fishes, with Some Remarks on Possible Physiological Races and Species
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Abstract

Ichthyophthirius multifiliis Fouquet, 1876, a fresh-water member of the Ophryoglenidae, and other "Ich-like" parasites of fresh-water fishes, appear to be limited in distribution and infectivity by the temperature tolerances of their hosts. Because of the widespread distribution of the parasite in aquaria, hatcheries, and rearing ponds, in tropical and temperate regions, probably multiple physiological races exist, perhaps even several separate species (possibly in more than one genus).

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