Physical properties of fish feed containing household waste as an alternative substitute in newly developed soft-dry fish feed for red tilapia

Abstract

Most of the fish pellet in market is quite low in requisites of water stability and can swell easily when it is immersed in water. Therefore, the soluble minerals and vitamins will be easily drained out from the pellet. Hence, a study was conducted to reduce the degree of mineral leaching and swelling while the floating time was maximized. The study was conducted to study the effect of varying the concentration of protein, vitamins, fats and carbohydrate on the swelling, leaching, floating properties and morphology of the developed soft-dry fish pellets for Red Tilapia from household waste. The result shows the relationship between fish feed formulation and properties of fish feed pellet produced. Fish feed of formulation of 50% exhibit the desired swelling, leaching and surface morphology with swelling rate of 10.20%, absorbance of 0.023 for leaching test and with few pores on the surface of the fish feed.