Jan 31, 2008 · Fish waste (mainly heads, bones, skin, viscera and sometimes whole fish and parsley) was heated at 65, 80, 105 and 150 °C for 12 h in order to reduce the moisture content to 10–12%, which is the recommended moisture content in animal feed (NRC (National Research Council), 1998). Fish waste proved to be a great source of minerals, protein [58
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