![]() ![]() The percentage inclusion of each feed ingredient is determined by factors such as feedstuff proximate composition, amino acid profile, shrimp nutrient requirements, ingredient cost, availability of each ingredient, feed digestibility and processing characteristics. A combination of feed ingredients is needed to supply the nutrients and energy shrimp need for best growth. Plant proteins can be deficient in key amino acids when compared with fishmeal ( Table 15) (Ahamad Ali, Syama Dayal and Ambasankar, 2004).Ī variety of plant and animal feedstuffs is used in shrimp feeds ( Table 13a, Table 13b). The moisture content, crude protein, crude lipid, crude fibre, nitrogen-free extract (digestible carbohydrates), ash content, vitamins and minerals, available phosphorus, amino acid content and levels of polyunsaturated fatty acids of the n–3 and n–6 series should be known for each feed ingredient (Piedad–Pascual, 1989a). Together with the nutrient requirements of shrimp, it is imperative to know the proximate composition of feedstuffs to be able to formulate a diet to meet these needs.
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