Poultry manure fertilization of Egyptian aquaculture ponds brings more cons than pros

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dc.creatorNyberg, Oskar
dc.creatorNovotny, Andreas
dc.creatorSbaay, Ashraf
dc.creatorNasr-Allah, Ahmed
dc.creatorAl-Kenawy, Diaa
dc.creatorRossignoli, Cristiano
dc.creatorHenriksson, Patrik
dc.date2024-09-15
dc.date2024-08-15T06:04:14Z
dc.date2024-08-15T06:04:14Z
dc.date.accessioned2026-06-27T18:47:21Z
dc.descriptionAquaculture is a crucial sector for Egyptian food production, providing a cheap source of animal protein while securing income and employment for a substantial part Egypt's population. Nile tilapia (Oreochromis niloticus) is the most commonly produced fish, usually farmed in earthen ponds around the Northern Delta Lakes. A common practice among farms is to fertilize ponds with chicken manure (CM) in order to increase nutrient levels and promote phytoplankton, consumed by the fish. However, with reports of use of antibiotics in Egypt's poultry sector, and that CM contains residues of antibiotics, antibiotic resistant pathogens and antibiotic resistance genes (ARGs) are production benefits large enough to compensate a potential health hazard? Using production data from 501 aquaculture farms and fish pond sediment from 28 ponds we evaluated potential benefits in yields and profitability for farms using CM for fertilization, and used qPCRs to screen sediments for three antibiotic resistance genes coding for resistance to the most commonly used antibiotics in the poultry sector. The analysis showed no significant benefits to fish yields or profitability in farms where CM was applied, but a risk of significantly increased nutrient loads. Meanwhile, we detected increased abundances of tetA and tetW resistance genes in fish pond sediment where CM was applied. With the risk of disseminating ARGs and causing eutrophication of local waterways, we recommend that Egyptian tilapia pond farmers refrain from using CM and adopt best management practices for increasing farm profitability in order to reduce environmental and health hazards.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/151690
dc.identifier.urihttp://hdl.handle.net/123456789/164449
dc.languageen
dc.publisherElsevier
dc.rightsOpen Access
dc.sourceOskar Nyberg, Andreas Novotny, Ashraf Sbaay, Ahmed Nasr-Allah, Diaa Al-Kenawy, Cristiano Rossignoli, Patrik Henriksson. (15/9/2024). Poultry manure fertilization of Egyptian aquaculture ponds brings more cons than pros. Aquaculture, 590 ( 15 September 2024, 741040).
dc.subjectaquaculture
dc.subjectprofitability
dc.subjectchicken manure
dc.subjecteutrophication
dc.subjectfish
dc.subjectargs
dc.titlePoultry manure fertilization of Egyptian aquaculture ponds brings more cons than pros
dc.typeJournal Article

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