Off-Flavor in Aquaculture: Causes and Solutions
Off-flavor is the leading cause of harvest delays and product rejection in pond aquaculture, affecting an estimated 30-50% of catfish and tilapia crops in warm-season production. The compounds responsible — geosmin and MIB — are not harmful to human health but render the product unmarketable. Understanding the biology of off-flavor production (cyanobacteria blooms), accumulation (gill absorption into lipid tissues), and removal (depuration in clean water) is essential for any pond-based aquaculture operation.