<strong>Eugenol and menthol as benzocaine substitutes in anaesthesic induction of pacu juveniles</strong> - DOI: 10.4025/actascianimsci.v30i3.1081

Abstract

Anaesthetics represents important tool for management procedures in aquaculture. This study aimed to verify the efficacy of natural anaesthesic induction of pacu juvenile. Were evaluated four menthol concentrations (50, 100, 150 and 200 mg L-1), four eugenol (10, 25, 50 and 100 mg L-1) and one of benzocaine (100 mg L-1). During the anaesthesic procedure were monitored and evaluated four sedative stages, until no reaction to handling. After biometric was evaluated recovery time and mortality 48 hours after anaesthesia. Concentrations 100, 150 and 200 mg L-1 of menthol, 50 and 100 mg L-1 of eugenol showed anaesthesic induction time and recovery time similar of benzocaine. The obtained results showed that menthol is an efficient anaesthesic for pacu juvenile in substitution of benzocaine, suggesting the concentration of 100 mg L-1 of menthol and 50 mg L-1 of eugenol.