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Gene transfer has offered a new tool for the development of improved fish strains for aquaculture. Monosex fish populations could minimize the impact of genetically modified organisms in the environment. In Oreochromis aureus, the use of pseudofemale spawners (sex-reversed male with a female phenotype) is an alternative technique for producing genetically male tilapia offspring. O. aureus fry were...
Growth manipulation of fish is an important task in aquatic biotechnology. The growth promoting effect of recombinant Pichia pastoris expressing tilapia growth hormone was demonstrated in red tilapia fry (Oreochromis sp.), which were immersed into water containing intact cells of the recombinant yeast. The weight increase of the treated group was 171% relative to the control group after 6 weeks.
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