Journal article
Growth of the winged pearl oyster, Pteria penguin, at dissimilar sites in Northeastern Australia
Journal of Shellfish Research, Vol.31(1), pp.13-20
2012
Abstract
Growth of Pteria penguin pearl oysters was monitored for 20 mo, from April 2009 to November 2010, to investigate differences in growth performance at three dissimilar sites: Pioneer Bay, Cape Ferguson, and Horseshoe Bay in the Great Barrier Reef lagoon. Growth parameters generated with the von Bertalanffy growth function ranged from K = 0.090.32 and L∞ = 283.6822.5. Overall growth performance (′) ranged from 4.404.77. Time to reach commercial size (T100) was between 1.38 y and 1.54 y, and T120 was between 1.74 and 1.92 y. A more accurate estimate of the L∞ = 213.4-mm dorsoventral measurement (DVM) was obtained at Pioneer Bay by using a larger data set that incorporated a wider size range of oysters. Overall monthly increase in DVM of oysters held at Horseshoe Bay (5.3±0.2 mm) was more than that at Pioneer Bay (4.7±0.2 mm) and Cape Ferguson (4.9±0.2 mm), and there were significant differences in the monthly DVM increase among the sites during growth measurement periods (P < 0.05). Monthly DVM growth was fastest (7.2±0.2 mm) in small oysters (DVM, 5070 mm) in the spring and summer and was lowest (2.4±0.4 mm) in larger oysters (DVM, 105110 mm) during the spring. Regression analysis showed anteroposterior measurement (APM), shell thickness (ST), and whole weight (WW) were significantly correlated with DVM for all groups (P < 0.001). In the commercial size class of 100120 mm DVM, mean WW of oysters at Cape Ferguson was significantly greater (P < 0.01), and the APM-to-DVM ratio was also significantly greater for oysters at Cape Ferguson and Horseshoe Bay (P < 0.01), whereas there were no significant differences among groups with regard to the ST-to-DVM ratio. At all 3 sites, the highest mortalities (measured as a percentage) were recorded for small oysters (DVM, 2550 mm) during the winter period. Suspended particulate inorganic matter (measured in grams) levels were significantly different among sites (P < 0.001). Comparison among growth rates obtained during this study demonstrate that there is significant variability in growth between sites in the Great Barrier Reef lagoon, and that P. penguin are able to tolerateand even thrive-under a wide range of turbidity levels.
Details
- Title
- Growth of the winged pearl oyster, Pteria penguin, at dissimilar sites in Northeastern Australia
- Authors
- M Milione (Author) - James Cook UniversityPaul C Southgate (Author) - James Cook University
- Publication details
- Journal of Shellfish Research, Vol.31(1), pp.13-20
- Publisher
- National Shellfisheries Association, Inc.
- Date published
- 2012
- DOI
- 10.2983/035.031.0102
- ISSN
- 0730-8000
- Copyright note
- Copyright © 2012 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
- Language
- English
- Record Identifier
- 99449147602621
- Output Type
- Journal article
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