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International Journal of Zoology
Volume 2014, Article ID 315029, 4 pages
Research Article

Efficacy of 2-Phenoxyethanol as an Anaesthetic for Adult Redline Torpedo Fish, Sahyadria denisonii (Day 1865)

1School of Fisheries Resource Management and Harvest Technology, Faculty of Fisheries, Kerala University of Fisheries and Ocean Studies (KUFOS), Panangad, Ernakulam, Kerala 682 506, India
2School of Bioscience, Mahatma Gandhi University, Kottayam, Kerala 686 560, India

Received 20 August 2014; Revised 17 October 2014; Accepted 12 November 2014; Published 8 December 2014

Academic Editor: Thomas Iliffe

Copyright © 2014 Anna Mercy Thoranam Varkey and Sajan Sajeevan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Efficacy of 2-phenoxyethanol for redline torpedo fish exposed to five concentrations (200, 300, 400, 500, and 600 μlL−1) was evaluated. The time periods necessary for each characteristic stage of induction and recovery were recorded. Results indicated that the induction time of the fish exposed to five anaesthetic concentrations significantly decreased with increasing concentration but recovery time was independent of concentration. Concentration of 500 μlL−1 (induction time: 173 ± 7 and recovery time: 129 ± 41 seconds) was determined as the minimum effective concentration that induces anaesthesia in less than 3 minutes.