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The growth of aquaculture has negatively affected the environment due to the high levels of nitrogen excreted by farmed fish. Here we propose that modifying the nitrogen metabolism of the fish themselves using transgenic technology might solve the pollution problem. Growth hormone (GH) is known to increase protein retention and absorption, and is thought to reduce ammonia excretion. Thus, we produced...
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...
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