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dc.contributor.authorDan, Nguyen Cen_UK
dc.contributor.authorLittle, David Cen_UK
dc.description.abstractTwo experiments (E1, E2) to evaluate the performance of new-season and overwintered fry in three strains (Viet, GIFT and Thai) of Nile tilapia (Oreochromis niloticus) were conducted at Research Institute for Aquaculture No.1 (RIA-1) in northern Vietnam. The performance of both mixed and monosex fish of the three strains was also compared. The experiments were carried out from May to November (E1) and August to November 1997 (E2) with overwintered and new-season fry, respectively. Each experiment included a comparison of production in fertilized earthen ponds (6×300 m2) and cages (18×1.2 m3) suspended within a single pond (1200 m2). In the pond trials, the three strains were stocked communally as either monosex or mixed-sex groups, whereas treatments (strain×sex) were separated into replicate cages. Individual size of fish stocked was 11.8±0.8 g (E1) and 9.4±0.4 g (E2). Floating pellets were fed at 5% (b.wt. day−1, 30% crude protein) initially, and declined to 2% by the third month of culture. Water quality and fish growth were monitored monthly. Overwintered fingerlings, both mixed and monosex, of all three strains performed well. Daily weight gain (DWG) ranged between 1.8 and 2.3 g day−1 in both ponds and cages. Among the three tilapia strains, the GIFT fish attained a significantly (P less than 0.01) larger individual final weight (387.7±21.0 g in ponds; 410.6±35.1 g in cages) compared to the Thai (351.6±26.1 g in ponds; 373.2±30.4 g in cages) and Viet strains (359.5±33.2 g in ponds; 350.3±33.4 g in cages). Overall, monosex fish of the three strains grew significantly faster than mixed-sex fish (P less than 0.05). DWG of new-season fingerlings (E2) in ponds ranged from 1.6 to 1.8 g day−1, showing slower growth compared to overwintered fingerlings. There was no significant difference in the growth between the three strains, and between mixed and monosex fish in ponds. Growth of all three strains was significantly slower in cages than ponds (overall DWG=0.8–0.9 g day−1; P less than 0.01). The results suggest that the performance of overwintered seed compare well with new-season fry. These results are discussed in the context of developing appropriate strategies for tilapia seed productions for northern Vietnam.en_UK
dc.relationDan NC & Little DC (2000) The culture performance of monosex and mixed-sex new-season and overwintered fry in three strains of Nile tilapia (Oreochromis niloticus) in northern Vietnam. Aquaculture, 184 (3-4), pp. 221-231.
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.titleThe culture performance of monosex and mixed-sex new-season and overwintered fry in three strains of Nile tilapia (Oreochromis niloticus) in northern Vietnamen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[littled_aquaculture_2000.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationAsian Institute of Technologyen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorDan, Nguyen C|en_UK
local.rioxx.authorLittle, David C|0000-0002-6095-3191en_UK
local.rioxx.projectInternal Project|University of Stirling|
Appears in Collections:Aquaculture Journal Articles

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