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Growing banana prawns in prawn farm settlement ponds to utilise and help remove waste nutrients.

Palmer, P.J. and Erler, D. and Burke, M.J. and Lobegeiger, R. and Morrison, C. and Bell, G. and Knibb, W. (2005) Growing banana prawns in prawn farm settlement ponds to utilise and help remove waste nutrients. In: Project Report QO04018. Wastewater remediation options for prawn farms - Aquaculture Industry Development Initiative 2002-04. Department of Primary Industries and Fisheries, pp. 5-24.

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Article URL: http://era.deedi.qld.gov.au/2080/

Abstract

To assess their utility for profitable wastewater bioremediation, banana prawns, Penaeus (Fenneropenaeus) merguiensis (de Man), were stocked at low densities (1 – 5 m-2) and grown without supplemental feeding in five commercial-prawn-farm settlement ponds (0.3 to 6.0 ha). The prawns free-ranged in the variously designed ponds for 160 to 212 days after stocking as PL15. Survival estimates ranged from 12% to 60% with production of 50 – 528 kg ha-1. Over 1150 kg of marketable product was produced in the study. Exceptional growth was monitored at one farm where prawns reached an average size of 17g in 80 days. Nutrients in water flowing into (8 - 40 ML d-1) and out of the settlement pond at that farm were assessed twice weekly along with routine water quality measurements. Only small differences in water qualities were detected between waters running into and out of this settlement pond. Total nitrogen levels gradually increased from 1 - 1.5 mg L-1 early in the season to over 3 mg L-1 towards the end of the season. Total phosphorus levels similarly rose from 0.1 - 0.2 mg L-1 to 0.3 - 0.4 mg L-1 in the middle of the season, but fell to 0.2 – 0.3 mg L-1 towards the end when approximately 12,000 prawns were harvested with a total weight of 175 kg. No significant differences (P > 0.05) were detected in the overall acceptability of prawns harvested from each of the 5 settlement ponds in small-scale consumer sensory analyses. The prawns from settlement ponds were rated similarly to banana prawns grown with commercial diets at two other establishments. Microbiological analyses of prawns from all farms showed bacterial levels to be well within food-grade standards and lower than prawns produced in a normal growout pond. These results demonstrate that high quality food grade banana prawns can be produced in these wastewater treatment systems.

Item Type:Book Section
Business groups:Agri-Science, Fisheries and Aquaculture
Additional Information:© The State of Queensland (Department of Employment, Economic Development and Innovation). © The State of Queensland, Department of Primary Industries 2005. Copyright protects this publication. Except for purposes permitted by the Copyright Act 1968, reproduction by whatever means is prohibited without prior written permission of the Department of Employment, Economic Development and Innovation. Enquiries should be directed to Commercialisation Unit: http://www.dpi.qld.gov.au/77.htm . Email: SAFTRSCopyright@deedi.qld.gov.au . Phone: the Business Information Centre on 13 25 23 (Queensland residents) or +61 7 3404 6999. Published electronically August 2011.
Keywords:Banana prawns; settlement ponds; bioremediation; prawn farm; wastewater; nutrients.
Subjects:Aquaculture and Fisheries > Aquaculture > Mariculture
Science > Science (General)
Deposited On:04 Aug 2011 05:26
Last Modified:08 Jun 2015 15:57

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