Abstract

SUAREZ-MARTINEZ, Roger O. et al. Eugenol as an Anesthetic for Handling Hybrid Pseudoplatystoma metaense by Leiarius marmoratus. Orinoquia [online]. 2014, vol.18, suppl.1, pp.256-259. ISSN 0121-3709.

The purpose of this study was to establish the optimal anesthetic concentration of eugenol for handling hybrid juvenile Pseudoplatystoma metaense by Leiarius marmoratus (PxL) and subsequent survival (24 hours). Forty juveniles youth PxL hybrid (9.3 ± 2.75 g and 9.08 ± 0.8 cm) from the ponds of IALL station obtained from the same spawning were exposed to eugenol (85% purity in oil base) (30, 50, 60 and 70 mg / L) and a control group (ethanol 0.8 ml / L). Specimens of each experimental group (n = 8 fish) were randomly selected and individually subjected to each treatment in an aquarium with a capacity of 10L and recovered in fresh water. The quality parameters determined for the experiment were: water temperature 28.3 ± 0.12°C, OD: 2.3 ± 8.0 mg / L and pH 5.4 ± 0.32. None of the treatments caused mortality (100% survival). Induction times measured for levels 50, 60 and 70 mg / L were significantly lower than those recorded for the concentration of 30 mg / L in which induction times were over 400 seconds. Although none of the concentrations produced damage to the recovery of the animals, in consideration of the time of induction of anesthesia-recovery, it is concluded that the concentration of 50 mg / L of eugenol is recommended for handling hybrid PxL.

Keywords : anesthesia; Siluriformes; clove oil; fish management.

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