Journal article
Hatchery rearing of the tropical blacklip oyster Saccostrea echinata (Quoy and Gaimard)
Aquaculture, Vol.169(3-4), pp.275-281
1998
Abstract
This paper reports on two growth trials in which larvae of the tropical black-lip oyster, Saccostrea echinata (Quoy and Gaimard), were reared to settlement, and on early spat growth to 2 weeks post-settlement. Broodstock oysters were induced to spawn by increasing water temperature to 33°C followed by rapid reduction in salinity and water temperature. Female oysters spawned a mean of 8.0 X 106 and 9.4 X 106 eggs in the first and second spawning, respectively. The maximum number of eggs spawned per individual was 18 X 106. Mean egg diameter was 52.9±3.2 μm (+s.d. n=30) and 55.2±2.8 μm (n=50) in the first and second spawning, respectively. Larvae reared at 28-31.2°C and fed an algal diet consisting of Isochrysis sp. (clone T-ISO), Pavlova salina and Chaetoceros muelleri reached settlement 20 days after-fertilisation. However, larvae reared at 27-30°C and fed only T-ISO and P. salina developed more slowly and did not reach settlement until 25 days after fertilisation. Survival from D-stage to competent pediveliger stage was low and ranged from 4.2-5.2%. At 2 weeks post-settlement, spat had a mean shell length of 2.3±0.4 mm and a mean dry weight of 1.7±0.2 mg. Although S. echinata seed can successfully be reared in the hatchery, poor larval survival may limit the potential of this species to support a hatchery-based aquaculture industry.
Details
- Title
- Hatchery rearing of the tropical blacklip oyster Saccostrea echinata (Quoy and Gaimard)
- Authors
- Paul C Southgate (Author) - James Cook UniversityP S Lee (Author) - James Cook University
- Publication details
- Aquaculture, Vol.169(3-4), pp.275-281
- Publisher
- Elsevier BV
- Date published
- 1998
- DOI
- 10.1016/S0044-8486(98)00382-2
- ISSN
- 0044-8486
- 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
- 99449190902621
- Output Type
- Journal article
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