Amyloodiniosis in juvenile of Diplodus argenteus (SPARIDAE) maintained at different salinities

Authors

  • Marcelo SOETH Mestrando em Sistemas Costeiros e Oce-­¢nicos -  UFPR. Laboratório de Ecologia de Peixes. Universidade Federal do Paraná. Centro de Estudos do Mar -  CEM http://orcid.org/0000-0003-3968-1993
  • Luciene Corrêa LIMA Professora Adjunta. Laboratório de Sanidade de Animais Aquáticos -  UFPR. Universidade Federal do Paraná. Centro de Estudos do Mar -  CEM
  • Felippe Alexandre DAROS Doutorando em Zoologia -  UFPR. Laboratório de Ecologia de Peixes. Universidade Federal do Paraná. Centro de Estudos do Mar -  CEM http://orcid.org/0000-0003-4848-5169

Keywords:

silver porgy, parasites, protozoa, fish culture

Abstract

This work reports the first occurrence of amyloodiniosis in silver porgy Diplodus argenteus and resistance of juvenile silver porgy to a wide range of salinities. The parasitism was diagnosed during a growth experiment conducted with 540 juveniles silver porgy with average weight of 0.1 ± 0.03 g and 19.0 ± 1.83 mm of total length, distributed in 18 tanks with a density of 0.33 ind L-1 and fed commercial diet for 14 days. Six treatments, T1 to T6, in triplicate, corresponded to the salinities tested: 10, 15, 20, 25, 30 and 34 psu respectively. While the basic parameters of water quality remained within normal ranges for all treatments, mortality rates were significantly different, ranging from 0 to 100% at the end of the study. The results indicate that silver porgy tolerates different salinities, but it is highly susceptible to amyloodiniosis; Amyloodinium cf. ocellatum has its pathogenic action reduced in lower salinities.

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Published

2018-11-11