54 Show Review
Additive strategies for optimising health and digestive performance in aquaculture A
new era for Nutriad/Adisseo Aquaculture was clear at Adisseo’s seminar entitled “Innovative strategies for a sustainable blue revolution”, held in conjunction with Asian-Pacific Aquaculture (APA’19). It was also the opportunity to introduce the new team and Adisseo’s product lines for aquaculture to the sector in Asia, gathered in Chennai, India for the annual conference and trade show held from June 19-21. In 2018, Nutriad was acquired by Adisseo, a global leader in nutritional solutions and additives for animal feeds. In his welcome to participants, Dr Peter Coutteau, Business Unit Director Aquaculture for Adisseo said that the benefit of being part of the larger Adisseo is the focus on diversification and integration. The aquaculture world is entirely different from the poultry sector and the blue revolution in Asia is exemplified by the farming of the vannamei shrimp. “The strategy for the aquaculture business unit is to develop key markets and India is one of them.” Coutteau explained that within Adisseo, aquaculture is positioned in the specialties business unit led by Francois Pellet. “Adisseo’s ambition to become a leader in aquaculture is supported by a strong expansion of the technical-commercial aqua team in all key markets and an investment plan for long term R&D“. The integrated Adisseo/Nutriad product portfolio covers all key aspects of additive requirements for aquafeed including programs for health, digestion, palatability, specialty nutrition, and feed quality. During this seminar attended by shrimp and fish farmers as well as aquafeed managers and technicians, Martin
September/October 2019 AQUA Culture Asia Pacific
Guerin, Regional Technical Manager- Aquaculture APAC/ISC looked at optimising lipid digestion and utilisation in aquafeeds. Guerin introduced categories of lipids and their functions. Lipid digestibility depends on the type of lipids and species. For the latter, the range is 20% to 90%. “We can improve lipid digestibility with feed additives such as lysophospholipids which form the easily-absorbed micelles. Lysophospholipids reduce the size of the micelles which result in faster absorption at the level of the intestine or hepatopancreas. Lysophospholipid based products find application in fish and shrimp feeds at inclusions between 0.5kg and 1kg/tonne.” Another strategy is bile salts which Guerin explained to be the strongest oil-in-water emulsifier existing in nature with much stronger emulsification power compared to lecithin and even lysophospholipids. Bile salts can replace cholesterol as they have the same structure as the cholesterol molecule. “When we replace fish oil and fish meal, there will be no source of cholesterol and lecithin is usually added into the formulation. In Vietnam, adding bile salts into the regular diet in pangasius feeds reduced visceral fat, improved growth and feed conversion ratio.” Dr Waldo Nuez Ortin, Lead Scientist-Aquaculture presented different strategies for the nutritionist to prevent oxidative stress in fish and shrimp. “Oxidative stress occurs when there is an imbalance between pro-oxidants and antioxidants. There are three levels; breaking down the free radicals, followed by capturing