The problem?
Very few protein sources in the world today are well standardised, well characterised, or of relatively consistent quality, in comparison to the other sources. Amongst them, most prominent are fishmeal, soybean meal, canola meal, and some animal by-products such as poultry by-product meal and feather meal.
To be consistent, these products need to be sourced from trusted and well-recognised suppliers, thus futhering the limits the supply of these products, and cost could be out-of-reach for most feed manufacturers.
Limited supply,
high price, and increasing demand of these well-characterised protein sources
have been forcing feed manufacturers worldwide to use less known and poorly
characterised plant and animal proteins. These proteins usually possess an
imbalanced amino acid profile, may contain some toxins or anti-nutrients, and
may be high in fibre or ash, rendering them difficult to digest.
High inclusion of
these protein sources in fish diet may result in reduced nutrient
digestibility, poor production performance, and sometimes, deterioration of the
gastrointestinal health. Quality of these raw materials also vary from region
to region and season to season, from manufacturer to manufacturer, and even
vary among batches from a single manufacturer.
As a result of these variations,
nutritionists and formulators often had to use irrationally high safety margins
for some key amino acids and micronutrients in order to meet the nutritional
requirement of the target animals.
To discover the solution, the history and all about proteases click here and read our full in page feature - Page 38
The Aquaculturists
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