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ABDEL-TAWWAB, M. (2000). FOOD AND FEEDING HABITS OF OREOCHROMIS NILOTICUS UNDER THE EFFECT OF INORGANIC FERTILIZER WITH DIFFERENT N:P:K RATIOS IN ABBASA FISHPONDS. Egyptian Journal of Agricultural Research, 78(1), 437-448. doi: 10.21608/ejar.2000.321714
MOHSEN ABDEL-TAWWAB. "FOOD AND FEEDING HABITS OF OREOCHROMIS NILOTICUS UNDER THE EFFECT OF INORGANIC FERTILIZER WITH DIFFERENT N:P:K RATIOS IN ABBASA FISHPONDS". Egyptian Journal of Agricultural Research, 78, 1, 2000, 437-448. doi: 10.21608/ejar.2000.321714
ABDEL-TAWWAB, M. (2000). 'FOOD AND FEEDING HABITS OF OREOCHROMIS NILOTICUS UNDER THE EFFECT OF INORGANIC FERTILIZER WITH DIFFERENT N:P:K RATIOS IN ABBASA FISHPONDS', Egyptian Journal of Agricultural Research, 78(1), pp. 437-448. doi: 10.21608/ejar.2000.321714
ABDEL-TAWWAB, M. FOOD AND FEEDING HABITS OF OREOCHROMIS NILOTICUS UNDER THE EFFECT OF INORGANIC FERTILIZER WITH DIFFERENT N:P:K RATIOS IN ABBASA FISHPONDS. Egyptian Journal of Agricultural Research, 2000; 78(1): 437-448. doi: 10.21608/ejar.2000.321714

FOOD AND FEEDING HABITS OF OREOCHROMIS NILOTICUS UNDER THE EFFECT OF INORGANIC FERTILIZER WITH DIFFERENT N:P:K RATIOS IN ABBASA FISHPONDS

Article 32, Volume 78, Issue 1, March 2000, Page 437-448  XML PDF (2.71 MB)
Document Type: Original Article
DOI: 10.21608/ejar.2000.321714
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Author
MOHSEN ABDEL-TAWWAB
Central Laboratory for Aquaculture, Agricultural Research Centre, Giza, Egypt
Abstract
The food and feeding habits of Nile tilapia (Oreochromis niloticus) in ponds received inorganic fertilizer with different ratios of N:P:K were studied. The ratios were 20:20:5,20:40:5, and 20:20:0 and applied at a rate of 40 kg/feddan/month. It was found that, 0.mloticus mainly con­sumed phytoplankton. The main items found in fish stomach belonged to Cyanophyta, Chlorophyta, Bacillanophyta and Euglenophyta. Detritus consisted mainly of scraps of macrophytes and mud. Zooplankton was occasionally found. The most frequently species represented in the food were Anabaena spp., Mensmopedia eleganse, Microcystas aeruginosa, Os­cillatona spp. and Spruhna sp. (Cyanophyta). Ch/Dregs spp., Pandonha morum, Pediastrum spp. Scenedesmus spp. and Shereoderia setigera (Chlorphyta), Amphora ovahs, Gyrostgma attenuatum, Melosira granulate, Navicula map., Nitzschia spp., Pin/J/aria spp. and Synedra sp. (Bacillanophyta) and Euglena spp. and Phacus spp. (Euglenophyta). 0.nthaticus could select only Cyanophyta and Euglenophyta dunng the in­vestigation period and sometimes select Bacillanophyta.
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