Five potential relaxant chemicals were evaluated: 2-phenoxyethanol, menthol crystals, benzocaine, MS-222, and magnesium chloride to induce relaxation in the queen conch for cultured pearl production. S. gigas were exposed to each chemical and were observed continuously for 30 min. Conch were placed on the bottom of the container with the aperture facing upwards (i.e., in an inverted position). When conch returned to their ‘normal’ position, they were turned facing upwards again. This process continued until conch were unable to return to their normal position. Only 30 g L−1 magnesium chloride induced adequate relaxation in S. gigas to attempt pearl seeding. Conch exposed to all other treatments, except 0.25 g L−1 menthol, showed a strong ‘kicking’ (escape) reaction during the initial 2 min to 7 min of exposure. After such reaction, conch retracted into their shells and within the 30 min exposure period they showed no signs of relaxation. Conch exposed to 0.25 g L−1 menthol did not attempt to right but slowly retracted into their shells and did not show signs of relaxation. Conch can be relaxed in 20 min with magnesium chloride. They showed an extended mantle, a relaxed foot and a slow response to physical manipulation.
Member of
Contributors
Publisher
Elsevier B.V.
Date Issued
2006
Note
Language
Type
Genre
Extent
6 p.
Subject (Topical)
Identifier
2761975
Additional Information
Five potential relaxant chemicals were evaluated: 2-phenoxyethanol, menthol crystals, benzocaine, MS-222, and magnesium chloride to induce relaxation in the queen conch for cultured pearl production. S. gigas were exposed to each chemical and were observed continuously for 30 min. Conch were placed on the bottom of the container with the aperture facing upwards (i.e., in an inverted position). When conch returned to their ‘normal’ position, they were turned facing upwards again. This process continued until conch were unable to return to their normal position. Only 30 g L−1 magnesium chloride induced adequate relaxation in S. gigas to attempt pearl seeding. Conch exposed to all other treatments, except 0.25 g L−1 menthol, showed a strong ‘kicking’ (escape) reaction during the initial 2 min to 7 min of exposure. After such reaction, conch retracted into their shells and within the 30 min exposure period they showed no signs of relaxation. Conch exposed to 0.25 g L−1 menthol did not attempt to right but slowly retracted into their shells and did not show signs of relaxation. Conch can be relaxed in 20 min with magnesium chloride. They showed an extended mantle, a relaxed foot and a slow response to physical manipulation.
This is the author’s version of a work accepted for publication by Elsevier. Changes resulting from the publishing process, including peer review, editing, corrections, structural formatting and other quality control mechanisms, may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. The definitive version has been published at http://www.elsevier.com/ and may be cited as: Acosta‐Salmon, Hector and Davis, Megan(2006) Inducing relaxation in the queen conch Strombus gigas (L.) for cultured pearl production, Aquaculture 262(1):73–77 doi:10.1016/j.aquaculture.2006.09.032
Florida Atlantic University. Harbor Branch Oceanographic Institute contribution #1641.
Date Backup
2006
Date Text
2006
DOI
10.1016/j.aquaculture.2006.09.032
Date Issued (EDTF)
2006
Extension
FAU
FAU
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IID
FADT2761975
Issuance
single unit
Person Preferred Name
Acosta-Salmón, Héctor
creator
Physical Description
6 p.
Title Plain
Inducing relaxation in the queen conch Strombus gigas (L.) for cultured pearl production
Origin Information
Elsevier B.V.
2006
single unit
Title
Inducing relaxation in the queen conch Strombus gigas (L.) for cultured pearl production
Other Title Info
Inducing relaxation in the queen conch Strombus gigas (L.) for cultured pearl production