Productive performance of a new synthetic red tilapia population ‘PargoâUNAM’ compared with that of wildâtype Nile tilapia (Oreochromis niloticus L.)
2012
RamírezâParedes, J G | GarduñoâLugo, M | MuñozâCórdova, G
A 342âday trial was conducted comparing productive performance in a synthetic strain of red tilapia PargoâUNAM (PU) and in a Nile tilapia Oreochromis niloticus (NT) population during four experimental stages: Is, IIs, IIIs and IVs. In the Is, 900 nonsexually inverted PU and NT fry (0.07 and 0.06âg respectively) were each placed in four plastic tanks per strain. For the IIs [1.59âg (PU) and 1.39âg (NT)], the population in each replicate was reduced to 440. For the IIIs [36.6âg (PU) and 36.5âg (NT)], the tanks were culled to 220 fish and transferred to 1âm3 cages. At the end of IIIs, all the fish were sexed and 40 fish (133.3–231.6âg) of a single sex were placed in a cage, with eight per genetic group. Survival was similar between groups in any stage. Weight gain was similar in Is and IIs, while PU exhibited more growth than NT during the IIIs. At the end of the IVs, weight of males was similar (PU=623.4âg; NT=650.1âg), but PU females had higher weight (435.4âg) than NT females (323.6âg). Fillet rate (>32%) was similar in all groups. Advantages of culturing the synthetic strain ‘PU’ are discussed.
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