Morphometric Relationships and Shell Form of Cultured Winged Pearl Oysters (Pteria penguin) in Tonga

Sophie E Gordon; Poasi Ngaluafe; Max Wingfield; Paul C Southgate

doi:10.2983/035.036.0317

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Morphometric Relationships and Shell Form of Cultured Winged Pearl Oysters (Pteria penguin) in Tonga

Journal article

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Morphometric Relationships and Shell Form of Cultured Winged Pearl Oysters (Pteria penguin) in Tonga

Sophie E Gordon, Poasi Ngaluafe, Max Wingfield and Paul C Southgate

Journal of Shellfish Research, Vol.36(3), pp.677-682

2017

DOI: https://doi.org/10.2983/035.036.0317

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Abstract

pearl oyster

pearl production

shell dimensions

morphometrics

mabé

Tonga

Pteria penguin

Shell dimensions of 588 hatchery-produced Pteria penguin (Röding, 1798) were measured and analyzed to describe morphometric changes in shell form of this species over its life cycle. Oysters ranged from 9.4 to 202.2 mm in dorsoventral height (DVH), 0.1-1,526.9 g in weight and spanned 0.5-5 y of age. Significant positive curvilinear relationships were observed between shell width (SW) and DVH (R2 = 0.99, P < 0.001), diagonal length (DL) and DVH (R2 = 0.99, P < 0.001), shell thickness (ST) and DVH (R2 = 0.98, P < 0.001), and wet weight (WW) and DVH (R2 = 0.99, P < 0.001). Trends in the morphometric ratios of P. penguin indicated a proportional decrease in SW and DL with increasing DVH, resulting in a shift from a horizontally elongate to a vertically elongate shell form. The ST of P. penguin remained proportionally stable over its life cycle, whereas its WW increased proportionally by more than two orders of magnitude. Based on the results of this study, future research should examine (1) the relationship between the external shell dimensions and internal nacreous area, (2) changes in nacre deposition rate in different shell locations, and (3) the relationship between soft tissue weight, shell weight, nacre thickness, and DVH of P. penguin. The description of the growth form of P. penguin represents an important first step toward determining optimum half-pearl (mabé) culture procedures for P. penguin in Tonga.

Details

Title: Morphometric Relationships and Shell Form of Cultured Winged Pearl Oysters (Pteria penguin) in Tonga
Authors: Sophie E Gordon (Corresponding Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Poasi Ngaluafe (Author) - Ministry of Fisheries, Tonga
Max Wingfield (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Paul C Southgate (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Publication details: Journal of Shellfish Research, Vol.36(3), pp.677-682
Publisher: National Shellfisheries Association, Inc.
Date published: 2017
DOI: 10.2983/035.036.0317
ISSN: 0730-8000
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: 99451196702621
Output Type: Journal article

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