Evonik Degussa Gaowen: Aquatic animals can effectively use crystalline methionine

Amino acids have found increasing applications in the livestock and poultry industry, though there are still areas that need improvement. The field is gradually maturing, but research on their use in aquatic products remains limited. As the world's largest producer of aquatic products, China has a significant opportunity to optimize the use of amino acids in aquaculture. This seminar was honored to host Dr. Gao Wen, Manager of the Aquatic Nutrition Program at Evonik Degussa (China) Investment Co., Ltd., who delivered a keynote speech titled "Progress in the Study of Methionine in Fish and Shrimp Feed." The content presented below was compiled by Dr. Gao Wen during the event and has not been verified by me.

Dr. Gao Wen shared insights from scientific studies on the value and role of methionine in both fish and shrimp feed, emphasizing its importance in modern aquaculture practices.

High prices in aquatic feed make exogenous amino acids a viable solution

Historical data shows that the use of fishmeal in feed increased from 10% in 1988 to 35% in 2000. Meanwhile, the price of fishmeal rose more than fivefold between 1988 and 2012. To reduce costs and meet sustainability goals, modern salmon feeds have been gradually reducing fishmeal content. Two common approaches are used to compensate for this reduction: adding plant-based proteins or synthetic amino acids. According to the "amino acid balance principle," the direct addition of crystalline amino acids offers considerable advantages in terms of efficiency and cost-effectiveness.

The value of methionine as a substitute for fishmeal in aquatic feed

Methionineâ€™s substitution value for fishmeal has been validated through concentration gradient experiments in various species, including salmon, southern Chinese tilapia, northern squid, and South American prawns. Specific substitution ratios were determined for each type of feed.

The benefits of using methionine instead of fishmeal are two-fold: first, it helps reduce feed costs while maintaining the same level of growth performance; second, it can significantly enhance the growth performance of aquatic organisms when used within the same cost range. This makes methionine a promising alternative in sustainable aquaculture.

Photo: Evonik Degussa (China) Investment Co., Ltd. - Dr. Gao Wen

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