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dc.contributor.authorFermin, Armando C.
dc.contributor.authorBolivar, Ma. Edna C.
dc.contributor.authorGaitan, Albert
dc.contributor.editorAl-Thobaiti, Salem A.
dc.contributor.editorAl-Hinty, Hamad M.
dc.contributor.editorSiddiqui, Abdaul Qayyum
dc.contributor.editorHussain, Ghulam
dc.date.accessioned2011-06-22T09:35:30Z
dc.date.available2011-06-22T09:35:30Z
dc.date.issued1994
dc.identifier.citationFermin, A. C., Bolivar, M. E. C., & Gaitan, A. (1994). Studies on the nursery rearing of seabass, Lates calcarifer (Bloch) fry in illuminated floating net cages. In S. A. Al-Thobaiti, H. M. Al-Hinty, A. Q. Siddiqui, & G. Hussain (Eds.), Aquaculture Technology and Investment Opportunities. Proceedings of the First International Symposium on Aquaculture Technology and Investment Opportunities, 11-14 April 1993, Riyadh, Saudi Arabia (pp. 187-199). Riyadh, Saudi Arabia: Ministry of Agriculture and Water; King Abdulaziz City for Science and Technology; Riyadh Chamber of Commerce and Industry.en
dc.identifier.urihttp://hdl.handle.net/10862/375
dc.description.abstractThe feasibility of rearing seabass, Lates calcarifer, fry for fingerling production in illuminated floating nursery cages was determined. In experiment 1, seabass fry of 20.0 mm mean TL were stocked at 600 and 1200 in 1 m3 illuminated cages and reared without supplemental feeding. Control fish were stocked at same densities in non-illuminated cages and fed minced trash fish. After 42 days, fish held in illuminated cages at either density had higher specific growth rates (SGR) and percent survival (20-38%) than those of fish reared in non-illuminated cages. Mean number of zooplankton trapped inside the illuminated cages was significantly higher than those found in the non-illuminated cages which was dominated by Copepods such as the Calanoid, Cyclopoid and Harpacticoid and their nauplii. In experiment 2, minimum body size of seabass fry at stocking in illuminated cages was determined. Seabass fry of 7.35, 11.30, 18.73 and 20.71 mm total length (TL) were stocked at three replicates in illuminated cages and reared for 30 days. Percent survival was significantly higher for fish stocked at an initial size of 11.30 mm TL than the other size groups. Number of “shooters” (range = 6-9%) was significantly higher among fish with initial size of 7.35 mm and 20.71 mm than in other groups. SGR of 8.28%/day was highest for fish with mean stocking size of 7.35 mm TL. Feeding incidence (FI) ranging from 13.16 ± 6.7% to 54.9 ± 4.2% was similar for all size groups during the first week of rearing and significantly increased towards the end of rearing period except for fish stocked at 7.35 mm initial TL. Results showed that nursery rearing seabass fry in illuminated cages is feasible. Natural zooplankton were attracted into the cages by artificial illumination sufficiently served as food to fish. Minimum stocking size of seabass fry is from 10-15 mm TL for better survival. Early transfer of fry in nursery cages and availability of natural zooplankton through artificial illumination can be a cost-effective method of nursing seabass fry.en
dc.language.isoenen
dc.publisherMinistry of Agriculture and Wateren
dc.publisherKing Abdulaziz City for Science and Technologyen
dc.publisherRiyadh Chamber of Commerce and Industryen
dc.subjectSea bassen
dc.subjectLates calcarifer
dc.subject.lccVF SP 0170
dc.titleStudies on the nursery rearing of seabass, Lates calcarifer (Bloch) fry in illuminated floating net cagesen
dc.typeConference paperen
dc.citation.spage187
dc.citation.epage199
dc.citation.conferenceTitleAquaculture Technology and Investment Opportunities. Proceedings of the First International Symposium on Aquaculture Technology and Investment Opportunities, 11-14 April 1993, Riyadh, Saudi Arabiaen
dc.subject.asfaFish cultureen
dc.subject.asfaStocking densityen
dc.subject.asfaAquaculture systemsen
dc.subject.asfaFryen
dc.subject.asfaFloating cagesen
dc.subject.asfaCage cultureen


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