Topic Title: Use of High and Regular Protein Corn Distiller’s Dried Grains with Solubles (DDGS) in Shrimp Diets
Speaker:
Dr. Romi Novriadi is the associate professor at the Jakarta Technical University of Fisheries or known as Politeknik Ahli Usaha Perikanan, Agency for Marine Affairs and Fisheries Research and Development, Ministry of Marine Affairs and Fisheries Republic of Indonesia. He has published more than 35 peer review research articles which include Aquaculture nutrition, shrimp and fish farming, functional feed, immunology, aquaculture technology and diseases management. Dr Romi was awarded two scholarships, the VLIR-UOS scholarship to pursue his Master of Science in Aquaculture at Ghent University–Belgium and the Fulbright scholarship to pursue his Ph. D in Fisheries and Allied Aquaculture at the Auburn University, Alabama, USA. Currently, Dr Romi focus on the development of intensive shrimp farming system and economical aqua-feed, evaluation of nutritional requirements for shrimp and fish as well as facilitate the evaluation of novel ingredients and feed supplemental properties to enhance the growth and health status of aquatic organisms.
Abstract:
Some of the main challenges faced by the shrimp industry today are the increase in feed prices triggered by the increase in raw material prices and high mortality rates due to pathogen infections. Mitigation measures to overcome the increasing feed prices that have an impact on production efficiency are to substitute the expensive raw materials, such as fish meal and soybean meal, with alternative raw materials that are more economical, such as the use of corn distiller’s dried grains with soluble (DDGS). Meanwhile, to overcome diseases, the β-glucan contained in high protein DDGS or also known as corn fermented protein (CFP) can be used as part of a strategy to improve the non-specific immune system of shrimp. To improve feed efficiency, two trials have been conducted to evaluate the use of corn DDGS to substitute the use of SBM with three different inclusion levels: 5, 10, and 15% in a controlled environment and using an outdoor pond. The results of the evaluation in a controlled environment for 52 and 84 days showed that there was no significant difference in final body weight (FBW), thermal growth coefficient (TGC), feed intake (FI), and feed conversion ratio (FCR) in shrimp fed with an inclusion level of DDGS up to 15% to substitute the use of SBM. Furthermore, the confirmation test using an outdoor pond also showed the same results. Reducing feed costs by 1.04%, 2.06%, and 3.05% in this trial become another added value of using DDGS to substitute SBM in feed, thereby increasing the efficiency and competitiveness of the shrimp produced. Meanwhile, for shrimp health, the further processing technique of DDGS to produce high protein DDGS or CFP contained with moderate level of yeast, can be an option. Our study showed that using CFP with three different inclusion levels, namely 6, 12, and 18% CFP, provided a better growth rate in shrimp compared to shrimp fed without CFP. In the challenge test, adding CFP can increase the survival rate of shrimp compared to the control against Vibrio harveyi. Interestingly, in commercial trials conducted in ponds that had a history of never being harvested due to Acute Hepatopancreatic Necrotic Diseases (AHPND) infection, for the first time, the infected pond achieved the same productivity as ponds that did not have an AHPND outbreak when the shrimp fed with CFP.
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