ARTICLE 56 FEED & ADDITIVE MAGAZINE April 2022 PAPAYA BY-PRODUCTS: APPLICATION IN AQUAFEEDS “Papaya is a tropical fruit; hence it is readily available throughout the year and economical. The primary by-products of the papaya processing industry include papaya peel and papaya seed, which accounts for 12 and 8.5% of fruit weight. These peels and seeds are rich in several phenolic compounds, which can exert an anti-oxidant effect in aquatic animals when administered through feed as a nutraceutical. There are very few significant studies available using papaya processing waste in the case of aquatic animals.” Papaya is a tropical fruit; hence it is readily available throughout the year and economical. The primary by-products of the papaya processing industry include papaya peel and papaya seed, which accounts for 12 and 8.5% of fruit weight. These peels and seeds are rich in several phenolic compounds, which can exert an anti-oxidant effect in aquatic animals when administered through feed as a nutraceutical. There are very few significant studies available using papaya processing waste in the case of aquatic animals. Globally, aquaculture is the booming food-producing sector and the growth rate of the sector is constantly increasing in the last few decades. To gear up with the drastic increase of world population and to ensure food safety and security from fisheries sector, it is a must to increase the overall aquaculture production. The production from aquaculture is possible through vertical expansion because horizontal expansion is limited due to limitation in resource availability. Increasing production is made possible nowadays because of aquaculture intensification. But vertical expansion may challenge the growth and immunity of fish. Fishes maybe stressed, their immune system collapses, and feed intake gets reduced. Hence, such systems require nutraceuticals to boost the immune system of the fish. Whereas, oxidative stress occurs in fish when there is an imbalance between the reactive oxygen species and the body's antioxidant system. In this case, we need to provide adequate anti-oxidants through diet to cope with the oxidative stress; commercially available synthetic antioxidants include ethoxyquin, BHA, BHT etc. where ethoxyquin cannot be used in the feed when exporting to Japan, Atshaya. S, N. Shamna, Parimal Sardar, Manish Jayant, N.P Sahu* ICAR-CIFE, FNBP Divison, Mumbai. *Corresponding author (npsahu@cife.edu.in)
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