Fish caught specifically for the production of fish meals are high in body oil content, much of which is extracted before making meal. There has been some interest in feeding fish oils to food animals to increase the omega-3 fatty acid content of meat, milk, and eggs and the reproductive performance of swine. Although feeding fish oils may have beneficial effects, problems such as softening of body fat, development of a fish-like odor in edible tissues, and reduced protein and fat contents in milk have been reported. It is therefore necessary to consider an optimum inclusion rate and/or a chemical treatment of oils to ensure acceptable final products.
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