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The main ingredients of feed |
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The main ingredients of feeds for farmed carnivorous fish species are fish meal and fish oil, at levels of about 25 percent and 30 percent, respectively. These two ingredients supply essential amino acids and fatty acids required by the fish for normal growth. More recently, small quantities of fish meal and fish oil (3-5 percent and 1-3 percent, respectively) have been included in feeds for omnivorous and herbivorous fish.
Manufactured fish feeds account for 35 percent of the fish meal and 55 percent of the fish oil produced annually. Most of the rest is used in manufactured feeds for terrestrial farm animals and poultry.
Carnivorous fish convert these manufactured feeds to edible flesh with maximum efficiency.
Farmed salmon convert approximately 1.2 kg of feed into 1 kg of fish.
Poultry convert between 3 and 5 kg of feed into 1 kg of flesh.
Pigs convert approximately 8 kg of feed into 1 kg of flesh.
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Fish feed