The success of the intensive culture of Sangkuriang catfish (Clarias gariepinus var. Sangkuriang) highly depends on the availability of feed. The feed is the most significant share of cost production hamper (50-60%). Therefore, it is suggested that feed utilization is inefficient. One of the solutions is to enrich the commercial feed with yeast (Saccharomyces cerevisiae). The research aimed to identify the impacts of yeast (S. cerevisiae) enhanced feed on feed efficiency, growth, and survival rate of Sangkuriang catfish fingerlings. The treatments research was yeast (S. cerevisiae) enrichment in the commercial feed at the various dosages: 0 %/kg feed (A), 3 %/kg feed (B), 6 %/kg feed (C), 9 %/kg feed (D), and 12 %/kg feed (E). The yeast (S. cerevisiae) enrichment in the commercial feed increased feed efficiency and survival rate of Sangkuriang catfish fingerlings. The optimum dosage of S. cerevisiae for apparent digestibility coefficients for protein (ADCp), efficiency feed utilization (EFU), protein efficiency ratio (PER), and relative growth rate (RGR) ranged from 6.10% to 6.51%/kg feed.

• Abdel-Tawwab, M., Mousa, M. A. A., & Mohammed, M. A. (2010). Use of live baker’s, yeast, Saccharomyces cerevisiae, in practical diet to enhance the growth performance of Galilee tilapia, Sarotherodon galilaeus (L.), and its resistance to environmental copper toxicity. Journal of the World Aquaculture Society, 41(S2), 214-223. https://doi.org/10.1111/j.1749-7345.2010.00361.x

• Abdel-Tawwab, M., Khattab, Y. A. E., Ahmad, M. H., & Shalaby, A. M. E. (2008). Compensatory growth, feed utilization, whole-body composition and haematological changes in starved juvenile Nile tilapia, Oreochromis niloticus (L.). Journal of Applied, Aquaculture, 18(3), 17-36. https://doi.org/10.1300/J028v18n03_02

• Al-Refaiee, I. H., Abdulrahman, N. M., & Mutter, H. A. (2016). Replacement of commercial dry yeast (Saccharomyces cerevisiae) with animal protein concentrate and its effect in some blood parameters for fingerlings common carp Cyprinus carpio L. Basrah Journal of Veterinary Research, 15(3), 312-332.

• Association of Official Analytical Chemists. (2005). Official methods of analysis of AOAC International (18th ed.). AOAC International.

• Boyd, C. E. (2003). Guidelines for aquaculture effluent management at the farm level. Aquaculture, 226(1-4), 101–112. https://doi.org/10.1016/S0044-8486(03)00471-X

• de Azevedo, R.V., Filho, J. C. F., Pereira, S. L., Cardoso, L. D., de Andrade, D. R., & Júnior, M. V. V. (2016). Dietary mannan oligosaccharide and Bacillus subtilis in diets for Nile tilapia (Oreochromis niloticus). Acta Scietarium Animal Science, 38(4), 347-353. https://doi.org/10.4025/actascianimsci.v38i4.31360

• Fenucci, J. L. (1981). Studies on the nutrition of marine shrimp of the Penaeus [Unpublished Doctoral dissertation]. University of Houston.

• Hurriyani, Y. (2017, May 23-24). Evaluasi penambahan ragi roti (Saccharomyces cerevisiae),dalam feed terhadap kinerja pertumbuhan benih ikan Jelawat (Leptobarbus hoevenii) [Evaluation of addition of bread yeast (Saccharomyces cerevisiae) in feed on growth performance of Jelawat fish (Leptobarbus hoevenii)] [Paper presentation]. Prosiding Seminar Nasional Penerapan Ilmu Pengetahuan and Teknologi 2017, Pontianak, Indonesia. https://www.researchgate.net/publication/325013236_EVALUASI_PENAMBAHAN_RAGI_ROTI_Saccharomyces_cerevisiae_DALAM_PAKAN_TERHADAP_KINERJA_PERTUMBUHAN_BENIH_IKAN_JELAWAT_Leptobarbus_Hoevenii

• Manoppo, H., & Kolopita, M. E. F. (2016). Penggunaan ragi roti (Saccharomyces cerevisiae) sebagai imunostimulan untuk meningkatkan resistensi ikan mas (Cyprinus carpio L.) terhadap infeksi bakteri Aeromonas hydrophila [The use of baker’s yeast (Saccharomyces cerevisiae) as immunostimulant to enhance resistance of gold fish, (Cyprinus carpio L.) to Aeromonas hydrophila infection]. Jurnal Budidaya Perairan, 4(3), 37-47. https://doi.org/10.35800/bdp.4.3.2016.14945

• Manurung, U. N., & Mose, N. I. (2018). Peningkatan pertumbuhan and sintasan hidup ikan bawal (Colossoma macropumum) dengan penambahan ragi roti dalam feed [The improvement growth and survival rate of pomfret fish (Colossoma macropumum) with yeast addition in feed]. Jurnal Saintek Lahan Kering, 1(2), 26-27. https://doi.org/10.32938/slk.v1i2.546

• Mohammadi, F., Mousavi, S. M., Zakeri, M., & Ahmadmoradi, E. (2016). Effect of dietary probiotic, Saccharomyces cerevisiae on growth performance, survival rate and body biochemical composition of three spot cichlid (Cichlasoma trimaculatum). AACL Bioflux, 9(3), 451-457.

• National Research Council. (2011). Proteins and amino acids. In Nutrient requirements of fish and shrimp (pp. 57-101). National Academy Press.

• Rachmawati, D., & Samidjan, I. (2018). The effects of papain enzyme supplement in feed on protein digestibility, growth and survival rate in Sangkuriang catfish (Clarias sp.). Omni-Akuatika, 14(2), 91- 99. https://doi.org/10.20884/1.oa.2018.14.2.551

• Rachmawati, D., Hutabarat, J., Samidjan, I., Herawati, V. E., & Windarto, S. (2019a). The effects of Saccharomyces cerevisiae-enhanced diet on feed usage efficiency, growth performance and survival rate in Java barb (Barbonymus gonionotus) fingerlings. AACL Bioflux, 12(5), 1841-1849.

• Rachmawati, D., Istiyanto, S., Ristiawan, A. N., & Susilowati T. (2019b). Effects of Sacharomyces cereviceae incorporated diet on growth performance, apparent digestibility coefficient of protein and survival rate of catfish (Pangasius hypothalamus). Aquacultura Indonesiana, 20(1), 8-14. https://doi.org/10.21534/ai.v20i2.140

• Rachmawati, D., Samidjan, I., & Mel, M. (2017). Effect of phytase on growth performance, feed utilization efficiency and nutrient digestibility in fingerlings of Chanos chanos (Forsskal 1775). Philippine Journal of Science, 146(3), 237-245.

• Sitohang, R., Herawati, V., T., & Lili, W. (2012). Pengaruh pemberian dedak padi hasil fermentasi ragi (Saccharomyces cerevisiae) terhadap pertumbuhan biomassa Daphnia sp. [Effect of yeast fermentation rice bran (Saccharomyces cerevisiae) on the growth of Daphnia sp. biomass]. Jurnal Perikanan and Kelautan, 3(1), 65-72.

• Tacon, A. G. J., Cody, J. J., Conquest, L. D., Divakaran, S., Forster, I. P., & Decamp, O. E. (2002). Effect of culture system on the nutrition and growth performance of Pacific white shrimp Litopenaeus vannamei (Boone) fed different feeds. Aquaculture Nutrition, 8(2), 121-137. https://doi.org/10.1046/j.1365-2095.2002.00199.x

• Tewary, A., & Patra, B. C. (2011). Oral administration of baker’s yeast (Saccharomyces cerevisiae) acts as a growth promoter and immunomodulator in Labeo rohita (Ham.). Journal of Aquaculture Research and Development, 2(1), 1000109. https://doi.org/10.4172/2155-9546.1000109

• Tovar, D., Zambonino, J., Cahu, C., Gatesoupe, F. J., Va´zquez-Ju´arez, R., & Le´sel, R. (2002). Effect of live yeast incorporation in compound diet on digestive enzyme activity in sea bass (Dicentrarchus labrax) larvae. Aquaculture, 204(1-2), 113-123. https://doi.org/10.1016/S0044-8486(01)00650-0

• Vendrell, D., Balcazar, J. L., de Blas, I., Ruiz-Zarzuela, I., Girones, O., & Muzquiz, J. L. (2008). Protection of rain-bow trout (Oncorhynchus mykiss) from lactococcosis by probiotic bacteria. Comparative Immunology, Microbiology and Infectious Diseases, 31(4), 337–345. https://doi.org/10.1016/j.cimid.2007.04.002

• Welker, T. L., Lim, C., Yildirim-Aksoy, M., & Klesius, P. H. (2012). Effect of short-term feeding duration of diets containing commercial whole-cell yeast or yeast subcomponents on immune function and disease resistance in channel catfish, Ictalurus punctatus. Journal of Animal Physiology and Animal Nutrition, 96(2), 159-171. https://doi.org/10.1111/j.1439-0396.2011.01127.x