Extremes in particle sizes are wasteful and often dangerous. Small fish and fry require plankton-size feeds available in dry form as a meal or granule. There are other reasons for grinding and the associated sieving of ingredients in formula feeds before further processing. (c) additives such as antioxidants may be blended.Īll of these improve the ease of handling ingredients and their storability. (b) some moisture is removed due to aeration, and (a) clumps and large fragments are reduced in size,
Many feed mills pass all incoming ingredients through a grinder for several reasons: Grinding or particle-size reduction is a major function of feed manufacturing. Since most fish have size and texture preferences and often react to colour, odour, and flavour, processing research is an integral part of fish culture. By one or more of these processes, a wide variety of ingredients can be prepared into a standardized product. Unless the fisheries biologist understands and specifies the activities of the feed mill and its laboratory, profitable fish farming will be a matter of chance.ĭry feeds may be ground, sifted, screened, mixed, compressed, expanded, texturized, coloured and flavoured.
INTRODUCTIONįeed manufacturing and the associated quality control programme are keys to successful fish culture.
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