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dc.contributor.authorDan, Nguyen Cen_UK
dc.contributor.authorLittle, David Colinen_UK
dc.description.abstractTwo experiments (E1 and E2) to assess the performance of tilapia broodstock and tilapia sex-reversed fry in overwintering were conducted at the Research Institute for Aquaculture No.1 (RIA-1) in the cold seasons of 1995–96 and 1996–97. Nile tilapia Oreochromis niloticus (L.) broodstock of the Thai, GIFT, Egypt and Viet strains were overwintered in deep and shallow ponds, as well as in deep and shallow hapas suspended in a single deep pond for evaluation of the influence of overwintering systems on the survival and growth of fish. Large (greater than 1 g) and small (less than 1 g) tilapia seed were overwintered in deep hapas-in-ponds for comparison of their performance. In 1995–96, the coldest pond water temperature was 10–11 °C, and survival of tilapia broodfish overwintered in deep and shallow hapas-in-ponds was 99.6–100%. This was significantly (P less than 0.05) higher than fish stocked in deep and shallow ponds (74.4–90%). The survival rate of larger monosex tilapia fry was 54%, which was significantly (P less than 0.05) higher than that of smaller fry (33.4%). In 1996–97, the lowest pond water temperature was 15.8 °C, and fry showed similarly high survival rates in all treatments (97–100%). There was no significant difference between fry in the two size classes. The results of this study clearly indicate that hapas-in-ponds are useful for reducing the risk and improving the survival of tilapia broodstock and fry in the cold season. Differences in the decline in ambient temperatures year on year mean that the need for special overwintering conditions varies. Hapas-in-ponds are a low-cost overwintering method that can be one of the appropriate strategies for tilapia seed production under the variable, cool temperature regimes in northern Vietnam.en_UK
dc.relationDan NC & Little DC (2000) Overwintering performance of Nile tilapia Oreochromis niloticus (L.) broodfish and seed at ambient temperatures in northern Vietnam. Aquaculture Research, 31 (6), pp. 485-493.
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.titleOverwintering performance of Nile tilapia Oreochromis niloticus (L.) broodfish and seed at ambient temperatures in northern Vietnamen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[littled_aquacultureresearch_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.citation.jtitleAquaculture Researchen_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 Colin|0000-0002-6095-3191en_UK
local.rioxx.projectInternal Project|University of Stirling|
Appears in Collections:Aquaculture Journal Articles

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