Show simple item record

dc.contributor.authorKonsowa, A.H.
dc.coverage.spatialEl-Fayoumen
dc.coverage.spatialEgypten
dc.date.accessioned2007-09-28T06:17:23Z
dc.date.available2007-09-28T06:17:23Z
dc.date.issued2007
dc.identifier.citationEgyptian journal of aquatic research, 33(1). p. 290-300
dc.identifier.issn1687-4285
dc.identifier.urihttp://hdl.handle.net/1834/1887
dc.description.abstractThis study was carried out at the fish farms of El-Fayioum province during 2003 farming season. They extend along the eastern bank of Lake Qarun. These farms derive its water and drainage wastes into Diar El-Berka Drain. pH values at the chosen farms ranged between 7.43 and 8.91 and its values are certainly optimum for fish culture. Salinity levels at fish farms adjacent to Lake Qarun (Goda 2, 9.5‰) are generally much higher than the other fishing ponds due to seepage from the lake water. The major nutrient concentrations (N & P) at the main feeder were much higher than the corresponding values at fish farms. Nitrogen concentrations that represented by NO2-N, NO3-N and NH4-N indicated the dominance of NH4-N over NO2-N and NO3-N at the selected fish farms (0.026, 0.091 & 0.59 mg/L respectively). Total organic phosphorus (TOP) concentrations at the chosen farms were much higher than the corresponding values of orthophosphate. The abundance of phytoplankton reached the climax during January and March (8746, 6937 x 104cell/L respectively), but showed a severe drop during September and October (59, 38 x 104cell/L respectively) at all farms under investigation. Oreochromis niloticus prefers diet on Navicula spp. and Cyclotella spp. from diatoms; Prorocentrum apora from dinoflagellates; Euglena spp. and Phacus caudatus from euglenoids and few species of green and blue green algae. So it should decreases supplementary foods at these farms during the abundance of phytoplankton items in spring and summer seasons. Fish production of these farms depends on intensive aquaculture in which the fishes are fed with external food supply. This kind of aquaculture can be changed to extensive production during spring and summer seasons.en
dc.description.sponsorshipNational Institute of Oceanography and Fisheries (NIOF), Egypten
dc.language.isoenen
dc.publisherNational Institute of Oceanography and Fisheries, Egypt
dc.relation.urihttp://www.nodc-egypt.org/en
dc.subject.classificationField Study
dc.titleEcological studies on fish farms of el-fayoum depression (egypt)en
dc.title.alternativeدراسات بيئية على المزارع السمكية في منخفض الفيوم – مصرar
dc.typeJournal Contribution
dc.bibliographicCitation.agscitationNumbervol. 33,issue:1 p.290-300
dc.bibliographicCitation.endpage300en
dc.bibliographicCitation.issue1en
dc.bibliographicCitation.stpage290en
dc.bibliographicCitation.titleEgyptian journal of aquatic researchen
dc.bibliographicCitation.volume33en
dc.description.notesThe Egyptian Journal of Aquatic Research is abstracted in both of Zoological Record and Chemical Abstract since Volume 31(1), 2005. The Chief Editor: Prof. Fatma Aly Abd El-Razek E-mail: fatma_abdelrazek@hotmail.comen
dc.description.statusPublisheden
dc.description.otherFish Farms, Oreochromis niloticusen
dc.subject.agrovocPhytoplanktonen
dc.subject.agrovocWater qualityen
dc.subject.asfaPhytoplanktonen
dc.subject.asfaWater qualityen
dc.subject.asfaFish farmsen
dc.type.refereedNon-Refereeden
dc.type.specifiedArticleen
refterms.dateFOA2021-01-30T18:47:35Z


Files in this item

Thumbnail
Name:
TEXT.pdf
Size:
399.8Kb
Format:
PDF
Description:
Published version
Thumbnail
Name:
Arabic.pdf
Size:
64.91Kb
Format:
PDF
Description:
Arabic Summary

This item appears in the following Collection(s)

Show simple item record