Transgenic plants could make for more nutritious salmon

Salmon don’t produce significant amounts of the fatty acids on their own, but instead obtain them by eating other fish. In the wild, this isn’t a problem. In farms, however, salmon are fed mainly plant-based foods. Fish oil used to be added to these in order to increase their nutritional content, although increased demand for commercial salmon feed has led to a shortage of such oils, boosting their price and reducing their availability – vegetable oil is now often used instead.

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