Using dietary additives to improve palatability of diets containing single?cell protein from methanotrophic bacteria in yellowtail kingfish ( <i>Seriola lalandi</i> ) diets

Single-cell protein (SCP) derived from methanotrophic bacteria has significant potential as a fishmeal alternative in aquafeeds. However, SCP known palatability issues, to overcome these issues tuna hydrolysate and garlic powder were tested enhancers against basal diets without additives. This study the inclusion of at four dietary levels 0%, 10%, 20% 30%, representing 25%, 50% 75% replacement juvenile yellowtail kingfish (Seriola lalandi) (YTK) diets. YTK fed triplicate over 35 days. Compared with control diet, fish SCP10% diet ate less feed, but had equal growth subsequently an improved FCR. Feed intake decreased increasing inclusion, ineffective improving intake. Despite reduction feed intake, FCR was across all levels, demonstrating that reduced performance higher function only Data showing retention efficiency apparent digestibility coefficients support this finding. showed can replace 25% 400 g/kg FM suggests if be then could achieved