Apparent Digestibility of Distillery Yeast Sludge Meal for Juvenile of Red Tilapia (Oreochromis niloticus)
Jacob L.A. Uktolseja1, Frendy Kurniawan1, Budhi Prasetyo2

1.Faculty of Biology, Satya Wacana Christian University, Salatiga, Indonesia
2. Faculty of Medicine and Health Sciences,
Satya Wacana Christian University, Salatiga, Indonesia

Abstract

For sustainable aquaculture, distillery yeast sludge meal (DYSM) derived from molasses fermented by Saccharomyces contains nutrition that can replace fishmeal (FM). Therefore, this study evaluated the apparent digestibility coefficients (ADCs) of nutrients of red tilapia (Oreochromis niloticus) juveniles with DYSM as an ingredient of feed. Fish was fed four experimental diets, which contained DYSM and FM respectively of 0 and 30% (D1) as the positive control, 5 and 15% (D2), 10 and 15% (D3), 15 and 15% (D4)- 0 and 15% (D5) as the negative control, during 90 days. The results show there were increasing trends of ADCs of protein, lipid, ash, and dry weight as the level of DYSM increased from 5 to 15%. ADCs of the protein of D4 did not significantly differ (P>0.05) from that of D5. ADCs of lipid, carbohydrate, and dry weight of D4 were not significantly different from D1. ADCs of ash of D4 level were significantly higher (P<0.05) than all other diets. It is concluded that the addition of DYSM in the ingredients of red tilapia feed does not hamper the digestibility of nutrients- therefore, DYSM can be used as a standard ingredient of fish feed to replace partially fishmeal.

Keywords: distillery yeast sludge meal, apparent digestibility, red tilapia

Topic: Sustainable Aquaculture and Fisheries