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Issue: Vol. 3422 No. 1: 14 Aug. 2012
Type: Articles
Published: 2012-08-14
DOI: 10.11646/zootaxa.3422.1.4
Page range: 62–68
Abstract views: 61
PDF downloaded: 1

Trichodina heterodentata (Ciliophora: Trichodinidae): a new parasite for Piaractus mesopotamicus (Pisces: Characidae)

UNESP Aquaculture Center, CAUNESP, Via de acesso prof. Paulo Donato Castellane, s/n, CEP: 14.884-900, Jaboticabal, SP, Brazil
AQUOS - Aquatic Organims Health Laboratory, Aquaculture Department, Federal University of Santa Catarina, Rod. Admar Gonzaga, 1346, CEP: 88040-900, Florianópolis, SC, Brazil
UNESP Aquaculture Center, CAUNESP, Via de acesso prof. Paulo Donato Castellane, s/n, CEP: 14.884-900, Jaboticabal, SP, Brazil Weed Environmental Research and Studies of the College of Agricultural and Veterinary Sciences at Unesp, Jaboticabal, SP, Brazil
Weed Environmental Research and Studies of the College of Agricultural and Veterinary Sciences at Unesp, Jaboticabal, SP, Brazil
Embrapa Western Agriculture, Brazilian Agricultural Research Corporation, EMBRAPA, BR 163, km 253.6, CEP: 79804-970, Dourados, MS, Brazil
Protozoa Trichodinids fish ectoparasite aquaculture health

Abstract

Trichodinids are mobile peritrichous ciliated protozoa, and widely known as ectocommensals and/or parasites of fish andother aquatic organisms. Little is known about the trichodinid fauna in Brazilian fish. This study reports Trichodina het-erodentata Duncan, 1977 as a new parasite for freshwater fish Piaractus mesopotamicus Holmberg, 1887. This is the firstrecord of this trichodinid in southeastern Brazil. Fifty specimens impregnated with 2% silver nitrate and another fiftystained with Giemsa were used for morphometry on the taxonomic characteristics. T. heterodentata in this study is medi-um size, with a disc-shaped body measuring 49.0 to 61.0 µm, parasitizing the skin, fins and gills of pacu. Measurement comparisons between the present material and other records from different countries are presented.

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