ISSUE FOCUS 48 FEED & ADDITIVE MAGAZINE May 2025 “Geographical regions also vary in their susceptibility to the different mycotoxin types. For instance, storage mycotoxins such as aflatoxin and ochratoxin A are of particular concern in the Asia-Pacific region due to the high temperatures and humidity that favor their growth. These mycotoxins can reduce feed efficiency, damage vital organs like the hepatopancreas, and lower survival rates in aquatic species.” ASIA-PACIFIC’S DOMINANCE IN AQUACULTURE Global aquaculture production now accounts for 51% of the global supply of aquatic animals, surpassing fisheries for the first time — and this increase is primarily driven by growth in the Asia-Pacific region, which in 2022 produced 83.4 million metric tons (MT) of aquatic animals out of the 94.4 million MT produced worldwide. INNOVATIONS IN AQUAFEED FORMULATIONS The aquaculture industry’s rapid expansion is supported by innovations in aquafeed formulations, with fed aquaculture now representing 73% of total production. With fish meal and fish oil becoming scarcer and more expensive, the industry has turned to alternative protein sources, primarily plant-based ingredients. Soybean meal is the most common plant protein used in the diets of farmed aquatic species, with inclusion rates varying across species such as Asian sea bass (25%), white-leg shrimp (35%), and pangasius catfish (42%). Other plant-based ingredients — such as wheatmeal, cornmeal and byproducts like dried distillers grains with solubles (DDGS) — are also widely used. RISKS OF MYCOTOXIN CONTAMINATION While plant-based ingredients are essential for sustainability, they bring the risk of mycotoxin contamination. Mycotoxins are toxic compounds produced by specific fungi that grow on plants before and after harvest, especially in inadequate storage conditions. Common mycotoxins in aquafeeds include Fusarium-produced toxins (e.g., fumonisins and deoxynivalenol), as well as aflatoxins and ochratoxin A, which are produced by Aspergillus and Penicillium species during storage. The Alltech 37+® lab offers advanced mycotoxin analysis technology such as liquid chromatography– tandem mass spectrometry (LC-MS/MS), which allows for the detection of up to 54 different mycotoxins. To assess the general risk of mycotoxin contamination, we examined the mycotoxin profiles of samples of soybean meal, DDGS, wheat and corn. MANAGING MYCOTOXIN RISKS IN ASIA-PACIFIC AQUACULTURE Dr. Vivi Koletsi Global Technical Support Specialist Alltech Coppens
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