Use of a probiotic for the culture of larvae of the Pacific oyster (Crassostrea gigas Thunberg) |
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| Affiliation: | 1. Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, QLD, Australia;2. Government of Western Australia, Department of Regional Development, Perth, WA, Australia;3. Aquaculture Section, Fisheries Division, Ministry of Agriculture and Food, Forests and Fisheries, Tonga;1. Tropical Marine Science Institute, National University of Singapore, Singapore 119227, Singapore;2. Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, Singapore 117543, Singapore;3. The UWA Oceans Institute and School of Plant Biology, University of Western Australia, Crawley, WA 6009, Australia;1. Institute of Aquaculture, University of Stirling, Stirling FK9 4LA, UK;2. Scottish Association for Marine Science, Scottish Marine Institute, Oban PA37 1QA, UK |
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| Abstract: | Additions of bacteria (strain CA2) as a food supplement to xenic larval cultures of the oyster Crassostrea gigas consistently enhanced growth of larvae during different seasons of the year. Bacterial enhancement of larval growth occurred when either Isochrysis galbana (ISO), I. aff. galbana (T-ISO) or Pseudoisochrysis paradoxa (VA-12) were used as algal foods. Additions of CA2 bacteria at 105 cells ml−1 to cultures of algal-fed larvae increased larval growth, the proportion of larvae that set to produce spat, and the subsequent size of spat. A lower proportion of slow-growing larvae in populations receiving additions of CA2 bacteria compared with populations of larvae fed only algae, suggests a bacterial nutritional contribution to larval growth. Manipulation of bacterial populations present in bivalve larval cultures is a potentially useful strategy for the enhancement of oyster production. |
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