Prevalence of ectoparasites and bacteriological diagnosis in Nile tilapia bred in net-tanks in the Corvo’s river, Paraná, Brazil

Autores

  • Ricardo Hideo Mori Universidade Estadual de Maringá
  • Renata Alari Chedid Universidade Estadual Paulista
  • Graciela Lucca Braccini Universidade Estadual de Maringá
  • Ricardo Pereira Ribeiro Universidade Estadual de Maringá
  • Carlos Antonio Lopes de Oliveira Universidade Estadual de Maringá
  • Lucienne Garcia Pretto-Giordano Universidade Estadual de Londrina
  • Lauro Vargas Universidade Estadual de Maringá

DOI:

https://doi.org/10.5433/1679-0359.2015v36n2p1145

Palavras-chave:

Densities, Monogenoidea, Oreochromis niloticus, Trichodina.

Resumo

Predominance of ectoparasites and bacteria diagnosis were identified in Nile tilapia (Oreochromis niloticus), GIFT strain, bred in net-tanks at different densities. Current experiment was performed in the Corvo’s river, State of Paraná, Brazil, in two cycles: cycle A installed in August 2010 with 155 days, and cycle B, installed in February 2011 with 128 days. Twenty 6.8 m-3 (2.0 x 2.0 x 1.7 m) net-tanks were employed, using 6.0 m-3 and five densities (150, 175, 200, 225 and 250 fish/m-3), with four replications each. No significant difference was registered with regard to the prevalence of ectoparasites due to densities in the two experimental cycles. In the months of September to November cycle A displayed increase in the predominance of Trichodina and a decrease in the prevalence of Monogenoidea and mixed parasites. Further, an inverse relationship with a decrease in the prevalence of Trichodina and an increase in the prevalence of Monogenoidea and mixed parasites occurred during October and November. Trochodina prevalence occurred in October and November. Cycle B showed a significant difference in total prevalence of ectoparasites due to months. There was an increase in tricodinid infestation between March and June in proportion to increase of density and throughout the experiment. More care should be taken with regard to densities during the period. No positive result was registered in the diagnosis of bacteria in Nile tilapias in the two cycles. The above was perhaps due to the water quality standards for the species and the cleanliness of the net-tanks for the experiments. Density increase did not affect the prevalence of ectoparasites and influenced tricodinid infestation between March and June.

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Biografia do Autor

Ricardo Hideo Mori, Universidade Estadual de Maringá

Discente de Pós-graduação em Aquicultura, Centro de Aqüicultura, CAUNESP, Universidade Estadual Paulista, UNESP, Jaboticabal, SP, Brasil.

Renata Alari Chedid, Universidade Estadual Paulista

Discente de Pós-graduação em Aquicultura, Centro de Aqüicultura, CAUNESP, Universidade Estadual Paulista, UNESP, Jaboticabal, SP, Brasil.

Graciela Lucca Braccini, Universidade Estadual de Maringá

Discente de Pós-graduação em Ciências Agrícolas, Universidade Estadual de Maringá, UEM, Maringá, PR, Brasil.

Ricardo Pereira Ribeiro, Universidade Estadual de Maringá

Prof. do Programa de Pós-graduação em Zootecnia, UEM, Maringá, PR, Brasil.

Carlos Antonio Lopes de Oliveira, Universidade Estadual de Maringá

Prof. do Programa de Pós-graduação em Zootecnia, UEM, Maringá, PR, Brasil.

Lucienne Garcia Pretto-Giordano, Universidade Estadual de Londrina

Profª, Deptº de Medicina Veterinária Preventiva, Universidade Estadual de Londrina, UEL, Londrina, PR, Brasil.

Lauro Vargas, Universidade Estadual de Maringá

Prof. do Programa de Pós-graduação em Zootecnia, UEM, Maringá, PR, Brasil.

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Publicado

2015-04-22

Como Citar

Mori, R. H., Chedid, R. A., Braccini, G. L., Ribeiro, R. P., Oliveira, C. A. L. de, Pretto-Giordano, L. G., & Vargas, L. (2015). Prevalence of ectoparasites and bacteriological diagnosis in Nile tilapia bred in net-tanks in the Corvo’s river, Paraná, Brazil. Semina: Ciências Agrárias, 36(2), 1145–1154. https://doi.org/10.5433/1679-0359.2015v36n2p1145

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