Publication: MS-222 toxicity in juvenile seabream correlates with diurnal activity, as measured by a novel video-tracking method
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Date
2010
Authors
Vera, L.M ; Ros Sánchez, G. ; García Mateos, Ginés ; Sánchez Vázquez, F.J.
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Publisher
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DOI
https://doi.org/10.1016/j.aquaculture.2010.06.028
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info:eu-repo/semantics/article
Description
©2010. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
This document is the Accepted version of a Published Work that appeared in final form in Aquaculture. To access the final edited and published work see
https://doi.org/10.1016/j.aquaculture.2010.06.028
Abstract
Fish are frequently exposed to anaesthetics since their use is necessary in several
aquaculture procedures. The aim of this study was to investigate the existence of day night differences in toxicity and effectiveness of a common fish anaesthetic (MS-222)
in juvenile gilthead seabream (Sparus aurata), determining the induction time of
anaesthesia and subsequent recovery by a novel video-recording system. Our results
showed that MS-222 toxicity was significantly higher at ML (mid-light) (LC50=85.5
mg/L) than at MD (mid-darkness) (LC50=107.6 mg/L) (trimmed Spearman-Karber
method). In addition, when fish were exposed to a sublethal but effective MS-222
concentration (65 mg/L), 7 min passed before 50% a reduction in swimming activity
was observed at ML compared to the 9 min required at MD. As regards recovery, fish
showed activity levels similar to basal levels 10 min after MS-222 removal at ML, but
only 6 min at MD. These results indicated that both toxicity and effectiveness were
higher during the day than at night, coinciding with the diurnal activity pattern
displayed by seabream, which should be taken into account when designing and
applying daily protocols for anaesthesia in aquaculture
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Citation
Aquaculture
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