Journal article
Assessing Protective Cylinders for Chaplet-Based Culture of the Winged Pearl Oyster Pteria penguin
Journal of Shellfish Research, Vol.39(1), pp.59-66
2020
Abstract
This study assessed the use of novel, locally made, protective culture cylinders as a means of improving pearl oyster Pteria penguin performance and standardizing culture methods used by mabé pearl farmers in Tonga. Cylinders were constructed from locally sourced wire mesh, for a cost of USD 12.1 each and were used to protect oysters grown on chaplets. Growth and survival of two age cohorts of oysters-"young" (0.7-y-old and 33.1±0.7-mm dorsoventral height (DVH)) and "old" (2.7-y-old and 86.9±0.8 mm DVH)-cultured using this system were determined every 3-5 wk over an 11-mo period. The DVH of "young" oysters increased by 74.6 mm, wet weight (WW) by 161.2 g, and shell thickness (ST) by 23.4 mm, whereas for "old" oysters, DVH, WW, and ST increased by 55.2 mm, 271.4 g, and 14.7 mm, respectively, over the same period. "Young" oysters held in culture cylinders reached the starting size of the "old" oyster cohort within seven months of growth and at less than half their age (1.2 and 2.7 y old, respectively). "Young" oysters held in culture cylinders also showed a 3-fold greater monthly growth rate than oysters cultured in trays (6.8 and 2.1 mm month-1, respectively). Survival of oysters in culture cylinders over the 11-mo culture period was 91.7% and 97.6% for "young" and "old" oysters, respectively, compared with 25% for oysters cultured in trays. The use of protective cylinders for P. penguin culture increases oyster survival and reduces the culture period required for P. penguin to reach minimum pearl production size by >50% relative to the current tray-based culture method, supporting improved mabé pearl farm profitability.
Details
- Title
- Assessing Protective Cylinders for Chaplet-Based Culture of the Winged Pearl Oyster Pteria penguin
- Authors
- Sophie E Gordon (Author) - University of the Sunshine Coast - School of Science and EngineeringMax Wingfield (Author) - University of the Sunshine Coast - School of Science and EngineeringSiola'a Malimali (Author) - Ministry of Fisheries, TongaTu'ikolongahau Halafihi (Author) - Ministry of Fisheries, TongaPaul C Southgate (Author) - University of the Sunshine Coast - School of Science and Engineering
- Publication details
- Journal of Shellfish Research, Vol.39(1), pp.59-66
- Publisher
- National Shellfisheries Association, Inc.
- Date published
- 2020
- DOI
- 10.2983/035.039.0106
- ISSN
- 0730-8000
- Copyright note
- Copyright © 2020 National Shellfisheries Association. Reproduced with permission of the publisher.
- Organisation Unit
- School of Science and Engineering - Legacy; Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering; External
- Language
- English
- Record Identifier
- 99451412302621
- Output Type
- Journal article
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- International collaboration
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- Fisheries
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