Show simple item record

dc.contributor.authorAziz, F.K.
dc.contributor.authorZaki, M.I.
dc.contributor.authorEl-Absawy, M. El-G.
dc.coverage.spatialEgypten
dc.date.accessioned2007-10-04T18:38:19Z
dc.date.available2007-10-04T18:38:19Z
dc.date.issued2007
dc.identifier.citationEgyptian journal of aquatic research, 33(1). p. 418-433
dc.identifier.issn1687-4285
dc.identifier.urihttp://hdl.handle.net/1834/1908
dc.description.abstractSparus aurata females in captivity were injected with human chorionic gonadotropin hormone (HCG), pituitary extraction and both them during the spawning season. First hormonal treatment was applied as cumulative doses required for successful ovulation ranged from 4500 to 7500 IU\fish, the maximum fertilization percent was 71. The ovulation period under the influence of this treatment extended up to 14 days. In the second experiment, the total dose requirement for successful ovulation ranged from 2 to 4 pituitary extractions. Fish and the maximum fertilization percent recorded was 81, while the longest ovulation period obtained was 15 days. In the third experiment the total doses required for successful ovulation ranged from 2 pituitary extractions and 4500 IU to 3 pituitary extraction and 7500 IU/fish. The maximum fertilization percent recorded was 88, while the ovulation period was extended up to 23 days. The combined treatment gave the highest value of fertilization percent and the longest ovulation period. Moreover, the results from the combined treatment showed the highest value of hatching percent of 83.5 when compared to those of HCG was 70.5 % or pituitary extraction was 80%. The maximum ovulation and fertilization percent was recorded at temperature ranging between 10 and 16°C. The survival percent of Sparus auratus larvae up to 10 days old after hatching were greatly affected by both temperature and photoperiod. The proper temperature ranged between 17 – 22 °C recording the highest survival percent 29 at natural photoperiod (8 h. light), while it increased to35% under continues illumination. The larvae starts feeding with rotifer at third day old were measured 0.2 mm. At 11th day old the post larvae measure 3.1 mm. and being reared to accept next feeding regime represented by Artemia nauplii.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.titleInduce spawning and larval reading of gilthead sea bream (sparus aurata)collected from fish farms, egypten
dc.title.alternativeالتفريخ الصناعي ورعاية اليرقات لاسماك الدنيس في بعض المزارع السمكية بمصرar
dc.typeJournal Contribution
dc.bibliographicCitation.agscitationNumbervol. 33,issue:1 p.418-433
dc.bibliographicCitation.endpage433en
dc.bibliographicCitation.issue1en
dc.bibliographicCitation.stpage418en
dc.bibliographicCitation.titleEgyptian journal of aquatic researchen
dc.bibliographicCitation.volume33en
dc.description.notesThe Chief Editor: Prof. Fatma Aly Abd El-Razek E-mail: fatma_abdelrazek@hotmail.com The Egyptian Journal of Aquatic Research is abstracted in both of Zoological Record and Chemical Abstract since Volume 31(1), 2005.en
dc.description.statusPublisheden
dc.description.otherSparus aurata, Pituitary extract, Human chorionic gonadotropinen
dc.subject.agrovocSpawningen
dc.subject.agrovocHatchingen
dc.subject.agrovocSurvivalen
dc.subject.asfaBiological fertilizationen
dc.subject.asfaSpawningen
dc.subject.asfaHatchingen
dc.subject.asfaLarval developmenten
dc.subject.asfaSurvivalen
dc.type.refereedNon-Refereeden
dc.type.specifiedArticleen
refterms.dateFOA2021-01-30T18:47:36Z


Files in this item

Thumbnail
Name:
Text.pdf
Size:
143.2Kb
Format:
PDF
Description:
Published version
Thumbnail
Name:
Arabic.pdf
Size:
21.02Kb
Format:
PDF
Description:
Arabic Summary

This item appears in the following Collection(s)

Show simple item record