Benzocaine and eugenol as anesthetics for Brycon hilarii

Bruno Matucita Fabiani,Odair Diemer,Aldi Feiden,Fábio Bittencourt,Dacley Hertes Neu,Wilson Rogério Boscolo

doi:10.4025/actascianimsci.v35i2.16644

Abstract

Anesthetic products are frequently employed during fish handling practices; however, the correct doses of the various chemicals for different species are still unknown. This study determined the ideal concentrations of benzocaine and eugenol as anesthetics used in Brycon hilarii juveniles. The fish were acquired from a commercial fish farm located in western Paraná state, Brazil, totaling 104 juveniles, with average body weight and length of 50.04 ± 20.80 g and 16.30 ± 12.32 cm respectively. The study was carried out at the Aquiculture Laboratory from the Aquaculture Management Study Group - GEMAq at the West Parana State University. Five benzocaine concentrations (50.0, 100.0, 150.0, 200.0 and 250.0 mg L-1) and seven eugenol concentrations (50.0, 100.0, 150.0, 200.0, 250.0, 300.0 and 350 mg L-1) were evaluated in order to assess the induction time to anesthesia. The fish were transferred to anesthetic-free tanks to recover, and the time needed to return to normal activity was recorded. The best results were observed with the benzocaine dose of 100 mg L-1 and the eugenol dose between 100 and 150 mg L-1.

Highlights

Fish farming has experienced uncontrolled growth in Brazil and worldwide and the commercial potential of species is frequently discovered
An improved understanding on the behaviors of different species in cultures is important to establish effective handling techniques reducing losses during fish rearing period. One of these newly farmed species in Brazil is known as piraputanga, belonging to the genus Brycon and Briconinae family
Animal Sciences group of the highly Neotropical migratory fish (HOWES, 1982). It is pursued by both local small fishing communities, for sport fishing due to its aggressive behavior (GANECO; NAKAGHI, 2003), and it is considered the main species of tourist interest in the area of Bonito, Mato Grosso do Sul State, Brazil (SANCHES; GALETTI JR., 2007)

Summary

Introduction

Fish farming has experienced uncontrolled growth in Brazil and worldwide and the commercial potential of species is frequently discovered. An improved understanding on the behaviors of different species in cultures is important to establish effective handling techniques reducing losses during fish rearing period. One of these newly farmed species in Brazil is known as piraputanga, belonging to the genus Brycon and Briconinae family. Animal Sciences group of the highly Neotropical migratory fish (HOWES, 1982) It is pursued by both local small fishing communities, for sport fishing due to its aggressive behavior (GANECO; NAKAGHI, 2003), and it is considered the main species of tourist interest in the area of Bonito, Mato Grosso do Sul State, Brazil (SANCHES; GALETTI JR., 2007)

Methods

Results

Conclusion