Aquaculture America 2024

February 18 - 21, 2024

San Antonio, Texas

PALATABILITY ASSESSMENT OF FORMULATED DIETS INCORPORATED WITH BLACK SOLDIER FLY PROTEIN FOR RED DRUM Sciaenops ocellatus

Michael Aina* , Juan F. Paredes, Sahar Mejri, Marty Riche, Paul S. Wills, Radu Popa 

Harbor Branch Oceanographic Institute

Florida Atlantic University

5600 US-1, Fort Pierce, FL, 34946

maina2022@fau.edu

 



 The contribution of protein to the high cost of production of aquaculture feeds cannot be overemphasized as it takes a larger percentage of the overall production cost when compared to other ingredients. Formulated aquafeeds are incorporated with large amounts of protein in  the form of fish meal, but the unstable supply  of fish meal due to  the reduction in natural fish stock and the continuous high demand for fish has led to its increase in price and unpredictability in terms of availability in the market. Hence there is a need to develop an alternative to fish meal.  The palatability of new ingredient is an important factor to be considered when formulating aquaculture diets as it will contribute largely to the consumption and digestibility of the feed by either making the fee d more or less attractive to the fish. Creating a desirable chemosensory feed that fish could readily locate and ingest, guarantees food consumption and low waste of uneaten feed. H ence,  the objective of the current study was to perform a palatability assessment trial on Black Soldier Fly protein when used as  a substitute for fish meal protein at different inclusion levels (25%, 50%, and 100%) on experimental diets for Red drum (Sciaenops ocellatus). Thirty red drum juveniles with an initial average weight of approximately 120g were stocked into 15 experimental tanks. Diets were randomly assigned to the tanks for assessment. Each diet had 3 replicates. Palatability assessment included a 12 day-period for feeding the experimental diets. Each assessment was repeated four times with a seven-day washout period between assessments. There were two feeding strategies tested 1) immediate change in the diet from the control to the test diets (Immediate Feeding Strategy), and 2) gradual change from the control to the test diets (Habituated Feeding Strategy). The Habituated Feeding Strategy group only used the 50% inclusion level as the test diet whereas the Immediate Feeding Strategy group used all three inclusion levels. This resulted in 5 different experimental groups (Control, Immediate 25%, Immediate 50%, Immediate 100% and Habituated 50%).  Our preliminary results suggest that the control diet, 25%, and 100% BSF replacement diets presented the same palatability response in Red drum.