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dc.contributor.authorLuu, Duc Dien
dc.contributor.authorLe, Huu Hiep
dc.contributor.authorFaggotter, Stephen John
dc.contributor.authorChen, Chengrong
dc.contributor.authorSammut, Jesmond
dc.contributor.authorBurford, Michele Astrid
dc.date.accessioned2019-08-26T06:08:41Z
dc.date.available2019-08-26T06:08:41Z
dc.date.issued2019
dc.identifier.issn0044-8486
dc.identifier.doi10.1016/j.aquaculture.2019.734315
dc.identifier.urihttp://hdl.handle.net/10072/386687
dc.description.abstractIntegrated rice-shrimp ponds (IRSPs) are common in areas of Southeast Asia where saltwater intrudes into rice fields in the dry season, enabling rice production in the wet season, and shrimp farming in the dry season or throughout the year. Previous research has highlighted that IRSPs have periods of low dissolved oxygen concentrations which may have a critical effect on shrimp survival. To understand the causes of low dissolved oxygen, this study examined oxygen fluxes at two IRSPs in Ca Mau Province, Vietnam during a two-year period (two wet seasons and two dry seasons). Sediment oxygen demand (SOD) incubations and whole-system oxygen flux measurements were conducted and compared with a range of water and sediment parameters to explain drivers for low oxygen concentrations. A high percentage of oxygen demand at a whole pond scale was from the sediment; hence SOD drove low oxygen concentrations in the water column. SOD rates were significantly positively correlated with chlorophyll a concentrations in the water column. These findings suggested that algal production in the water column, rather than benthic algal production, or other organic loading, provided an organic carbon source driving SOD. Oxygen demand was much higher than oxygen production within the IRSPs, indicating high bacterial activity and low algal production. This study has shed new light on the importance of SOD in driving oxygen drawdown in IRSPs and improving shrimp survival requires new management approaches to reduce the negative effect of SOD.
dc.description.peerreviewedYes
dc.description.sponsorshipAustralian Centre for International Agriculture Research
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom734315-1
dc.relation.ispartofpageto734315-8
dc.relation.ispartofjournalAquaculture
dc.relation.ispartofvolume512
dc.subject.fieldofresearchZoology
dc.subject.fieldofresearchFisheries sciences
dc.subject.fieldofresearchVeterinary sciences
dc.subject.fieldofresearchcode3109
dc.subject.fieldofresearchcode3005
dc.subject.fieldofresearchcode3009
dc.titleFactors driving low oxygen conditions in integrated rice-shrimp ponds
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationDien, LD; Hiep, LH; Faggotter, SJ; Chen, C; Sammut, J; Burford, MA, Factors driving low oxygen conditions in integrated rice-shrimp ponds, Aquaculture, 2019, 512, pp. 734315-1 - 734315-8
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated2019-08-26T06:04:25Z
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2019 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorBurford, Michele A.
gro.griffith.authorChen, Chengrong


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