Anesthetic Evaluation of Essential Oils of Prunus myrtifolia, Pilocarpus pennatifolius, and Casearia sylvestris in Silver Catfish Juveniles (Rhamdia quelen).

Authors

Carlos Herminio M Fortes, Fabiola T Ferrari, Bernardo Baldisserotto, Paulo Fernando S Machado, Frederico D Fleig, Berta Maria Heinzmann

Published in

Anais da Academia Brasileira de Ciencias. Volume 98. Issue 4. Pages e20250319. Epub Oct 23, 2026.

Abstract

Essential oils are used in animals, mainly in research, for the development of new drugs. However, more are needed to characterize their sedative and anesthetic properties in fish. Therefore, the objective of this work was to determine the anesthetic potential of the essential oils of Prunus myrtifolia, Pilocarpus pennatifolius, and Casearia sylvestris in silver catfish (Rhamdia quelen) and analyze their chemical composition through gas chromatography. Concentrations for rapid induction and recovery from anesthesia were tested in the range of 50 to 300 mg L-1, while prolonged exposure was observed in the range of 10 to 100 mg L-1. The essential oils of P. pennatifolius and C. sylvestris are suitable for sedation, as they did not induce anesthesia or cause visible adverse effects or mortality. Thus, these essential oils are promising for future investigations in the studied species. However, the essential oil of P. myrtifolia is not recommended as an anesthetic or sedative due to the signs of toxicity observed.

PMID:
42961194
Bibliographic data and abstract were imported from PubMed on 30 Oct 2026.

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