Parasitic infestations in hybrid surubim catfish fry (Pseudoplatystoma reticulatum x P. corruscans)

  • Santiago Benites de Pádua
  • Márcia Mayumi Ishikawa
  • Rodrigo Yutaka Dichoff Kasai
  • Gabriela Tomas Jerônimo
  • Juliana Rosa Carrijo Mauad
Keywords: Fry, Ciliophora, Myxosporea, Monogenoidea

Abstract

ABSTRACT. Pádua S.B., Ishikawa M.M., Kasai R.Y.D., Jerônimo G.T., Carrijo-Mauad J.R. [Parasitic infestations in hybrid surubim catfish fry (Pseudoplatystoma reticulatum x P. corruscans)]. Infestações parasitárias em alevinos de surubim hí- brido (Pseudoplatystoma reticulatum x P. corruscans). Revista Brasileira de Medicina Veterinária, 34(3):235-240, 2012. Centro de Aquicultura, Unesp (CAUNESP), Rod. Paulo Donato Castellane, s/n, Bairro Rural, Jaboticabal, SP 14884-900, Brazil. E-mail: santiagopadua@live.com This study evaluated parasitic infestations in the hybrid surubim catfish (Pseudoplatystoma reticulatum ♀ x P. corruscans ♂) during the initial phase of rearing. 50 fish of lengths ranging from 5.7 to 20.3 cm and weights from 1.2 to 48.8 g were examined. Among the fish evaluated, only 15 (30%) were parasite-free, while at least one type of parasite was diagnosed in all of the other 35 (70%). Among these, the protozoan Ichthyophthirius multifiliis, Epistylis sp. and Trichodina sp. were observed. Occurrences of myxosporidians were seen, represented by Henneguya sp. and a metazoan belonging to the class Monogenoidea. The ciliated protozoa I. multifiliis, Epistylis sp. and Trichodina sp. were the main parasites infesting the gills and tegument of hybrid catfish fry. The peritrichid Epistylis sp. may be an emerging parasite in Brazil.

Published
2012-10-30
How to Cite
de Pádua, S. B., Ishikawa, M. M., Kasai, R. Y. D., Jerônimo, G. T., & Mauad, J. R. C. (2012). Parasitic infestations in hybrid surubim catfish fry (Pseudoplatystoma reticulatum x P. corruscans). Brazilian Journal of Veterinary Medicine, 34(3), 235-240. Retrieved from http://rbmv.org/index.php/BJVM/article/view/725