First record of Trichodina heterodentata , cultivado no Brasil

• Published in: Brazilian journal of biology Vol. 82
• Main Authors: Sousa-Filho, I.P, Moares, R.S, Saturnino, K.C, Tavares-Dias, M, Braga, I.A, Ziemniczak, H.M, Souto, C.N, Ramos, D.G.S
• Format: Journal Article
• Language: English
• Published: Association of the Brazilian Journal of Biology 01-02-2022
• Subjects: Brasil
• ISSN: 1519-6984
• DOI: 10.1590/1519-6984.240840

The aim of this study was to report the first record of Trichodina heterodentata in banded knifefish Gymnotus carapo. Banded knifefish cultivated in the municipality of Jatai, state of Goias, in the central western region of Brazil, experienced fish mortality rates of 3-4% per tank. Macroscopic analysis found that fish had lesions on their skin and gills. Smears of the integument and gills were confectioned and air-dried at room temperature and impregnated with silver nitrate to identify the Trichodinidae species causing the lesions. The trichodinid were identified as T. heterodentata, and their characteristics were compared to those from T. heterodentata recorded from other species of host fish. It was observed that the presence of T. heterodentata was associated with inadequate fish management, low water quality, high rates of stocking density, and inadequate nutritional management. Keywords: fish farm, infestation, parasites, production, trichodinids. O objetivo deste estudo foi relatar o primeiro registro de Trichodina heterodentata em tuviras Gymnotus carapo. Um cultivo de tuviras no municipio de Jatai, estado de Goias, na regiao Centro- Oeste do Brasil, apresentou taxas de mortalidade de peixes de 3-4% por tanque. A analise macroscopica constatou que os peixes tinham lesoes na pele e branquias. Raspados do tegumento e branquias foram confeccionadas e secas ao ar a temperatura ambiente e impregnadas com nitrato de prata para identificar as especies de Trichodinidae causadoras das lesoes. Os tricodinideos foram identificados como T. heterodentata, e suas caracteristicas foram comparadas com as de T. heterodentata registradas para outras especies de peixes hospedeiros. Observou-se que a presenca de T. heterodentata estava associada ao manejo inadequado dos peixes, baixa qualidade da agua, altas taxas de densidade de estocagem e manejo nutricional inadequado. Palavras-chave: piscicultura, infestacao, parasito, producao, tricodinideos.