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Anaesthetic induced relaxation of the winged pearl oyster, Pteria penguin, varies with oyster size and anaesthetic concentration1.02 MB
Published VersionCC BY-NC-ND V4.0, Open Access
Journal article
Anaesthetic induced relaxation of the winged pearl oyster, Pteria penguin, varies with oyster size and anaesthetic concentration
Aquaculture Reports, Vol.22, pp.1-6
2022
Abstract
Stress and mortality of pearl oysters during nucleus implanting for round pearl and mabé pearl production can be reduced using appropriate anaesthetics that allow improved access to nucleus implanting sites. This study evaluated the efficacy of three different concentrations of benzocaine (0.25, 0.50 and 1.20 g L-1) and 1-propylene phenoxetol (2.50, 3.00 and 3.50 mL L-1) when presented to 'small' (dorso-ventral height [DVH], 78.7 ± 1.6 mm), 'medium' (DVH, 118.2 ± 2.0 mm) and 'large' (DVH, 149.3 ± 1.1 mm) cohorts of the winged pearl oyster, Pteria penguin. Results showed the following general trends across treatments with both anaesthetics: (1) greater proportions of large oysters became relaxed compared to small oysters; (2) large oysters required shorter exposure times to become relaxed than small oysters; (3) for each size class of oyster, an increase in anaesthetic concentration resulted in an increased proportion of relaxed oysters; and (4) 'mantle collapse' (where the mantle collapses away from the shell) was only recorded in large oysters in treatments with higher concentrations of anaesthetics. The most effective concentration of benzocaine to use with small, medium and large Pt. penguin was the highest level tested in this study (1.20 g L-1). Similarly, the highest concentration of 1-propylene phenoxetol tested (3.5 mL L-1) was also the most effective with all three size classes of Pt. penguin. These treatments caused mantle collapse in large oysters, for which use of lower, less effective anaesthetic concentrations may be considered preferable, to avoid potentially negative impacts of mantle collapse on subsequent mabé pearl production. As well as efficacy, choice of anaesthetic should consider ease of preparation and preparation time. Benzocaine requires dissolving in methyl alcohol and heating to 88–92˚C92˚92˚C, while 1-propylene phenoxetol is readily soluble in seawater.
Details
- Title
- Anaesthetic induced relaxation of the winged pearl oyster, Pteria penguin, varies with oyster size and anaesthetic concentration
- Authors
- Pranesh Kishore (Author) - University of the Sunshine Coast, Queensland, Australian Centre for Pacific Islands ResearchMax Wingfield (Author) - University of the Sunshine Coast, Queensland, Australian Centre for Pacific Islands ResearchThane Militz (Author) - University of the Sunshine Coast, Queensland, Australian Centre for Pacific Islands ResearchTracy Aisea (Author) - Ministry of Fisheries, TongaPaul Southgate (Corresponding Author) - University of the Sunshine Coast, Queensland, Australian Centre for Pacific Islands Research
- Publication details
- Aquaculture Reports, Vol.22, pp.1-6
- Publisher
- Elsevier BV
- Date published
- 2022
- DOI
- 10.1016/j.aqrep.2021.100987
- ISSN
- 2352-5134
- Copyright note
- © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
- Organisation Unit
- Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99594008902621
- Output Type
- Journal article
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