Effect of the treatment with diflubenzuron in the hematology of Jundiás Rhamdia quelen (Pimelodidae) infected by Lernaea cyprinacea (Copepoda) in 24-hour immersion baths - DOI: 10.4025/actascibiolsci.v28i2.1040

Abstract

There are no specific formulations of diflubenzuron for the treatment of ectoparasities in freshwater fishes. Many therapeutics protocols of untested efficacy, environmental impact and unknown hematological effects have been introduced in Brazilian aquaculture. The aim of this study was evaluate the diflubenzuron effect on the hematological parameters (total number of erythrocytes, hematocrit, total number of leucocytes and differential count of leucocytes) of “Jundias” (Rhamdia quelen) infected by Lernaea cyprinacea. Four groups of jundias were exposed to a 24 hour immersion bath containing diflubenzuron in concentrations: 0.0 mg.L^-1, 0.01 mg.L^-1, 0.1 mg.L^-1 and 1.0 mg.L^-1. These concentrations of diflubenzuron did not show any significant difference in the basal parameters of hematology (Tukey test p < 0.05) of Jundias. More studies about the effect of diflubenzuron on the hematology of infected fishes exposed to a long period of treatment are needed to test chronic effects.