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Estimation of nitrogen and phosphorus in effluent from the striped catfish farming sector in the Mekong Delta, Vietnam De Silva, Sena S., Ingram, Brett A., Nguyen, Phuong T., Bui, Tam M, Gooley, Geoff J. and Turchini, Giovanni M 2010, Estimation of nitrogen and phosphorus in effluent from the striped catfish farming sector in the Mekong Delta, Vietnam, Ambio : a journal of the human environment, vol. 39, no. 7, pp. 504-514. Attached Files Name Description MIMEType Size Downloads Title Estimation of nitrogen and phosphorus in effluent from the striped catfish farming sector in the Mekong Delta, Vietnam Author(s) De Silva, Sena S. Ingram, Brett A. Nguyen, Phuong T. Bui, Tam M Gooley, Geoff J. Turchini, Giovanni M Journal name Ambio : a journal of the human environment Volume number 39 Issue number 7 Start page 504 End page 514 Total pages 11 Publisher Springer Netherlands Place of publication Dordrecht, Netherlands Publication date 2010-11 ISSN 0044-7447 1654-7209 0301-0325 Keyword(s) Effluent discharge Mekong Delta Nutrient mass balance Nitrogen Pangasius Phosphorus Striped catfish Tra Catfish BMPs Summary In this study an attempt is made to estimate nitrogen and phosphorus discharged to the environment from the striped catfish (Pangasianodon hypophthalmus) farming sector in the Mekong Delta (8°33̕–10°55̕ N, 104°30̕–106°50̕ E), South Vietnam. The sector accounted for 687,000 t production in 2007 and 1,094,879 t in 2008, with over 95% of the produce destined for export to over 100 countries. Commercial and farm-made feeds are used in catfish farming, currently the former being more predominant. Nitrogen discharge levels were similar for commercial feeds (median 46.0 kg/t fish) and farm-made feeds (median 46.8 kg/t fish); whilst, phosphorus discharge levels for commercial feeds (median 14.4 kg/t fish) were considerably lower than for farm-made feeds (median 18.4 kg/t fish). Based on the median nutrient discharge levels for commercial feeds, striped catfish production in the Mekong Delta discharged 31,602 t N and 9,893 t P, and 50,364 t N and 15,766 t P in 2007 and 2008, respectively. However, the amount of nutrients returned directly to the Mekong River may be substantially less than this as a significant proportion of the water used for catfish farming as well as the sludge is diverted to other agricultural farming systems. Striped catfish farming in the Mekong Delta compared favourably with other cultured species, irrespective of the type of feed used, when the total amounts of N and P discharged in the production of a tonne of production was estimated. Notes Published online: 6 July 2010 Language eng Field of Research 070401 Aquaculture Socio Economic Objective 830102 Aquaculture Fin Fish (excl. Tuna) HERDC Research category C1 Refereed article in a scholarly journal HERDC collection year 2010 Copyright notice ©2010, Royal Swedish Academy of Sciences Persistent URL http://hdl.handle.net/10536/DRO/DU:30030677 Document type: Journal Article Collection: School of Life and Environmental Sciences Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Mon, 18 Oct 2010, 16:02:42 EST Mon, 25 Oct 2010, 10:27:40 EST Mon, 25 Oct 2010, 13:12:41 EST Mon, 25 Oct 2010, 13:13:45 EST Mon, 25 Oct 2010, 13:18:07 EST Mon, 25 Oct 2010, 13:19:17 EST Filtered Full Citation counts:   Cited 12 times in TR Web of Science Cited 13 times in Scopus Search Google Scholar Access Statistics: 384 Abstract Views, 2 File Downloads  -  Detailed Statistics Created: Mon, 18 Oct 2010, 16:02:35 EST by Teresa Treffry

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