In recent years, there has been a significant increase in attention towards the utilization of insect-based products as potential alternatives for key nutrients in aquafeeds. This presentation offers a comprehensive review of the studies conducted by Stellenbosch University and Nutritionhub on the incorporation of insect-derived products into aquafeeds. This presentation will focus on the functional benefits associated with the integration of insect-derived products into production procedures, with particular emphasis on their impacts on production efficiency, meat characteristics, and consumer health.
The research findings pertain to the efficient usage of insect products as a protein source and feasible substitute for fish meal in catfish, tilapia, and abalone diets. Insect meal was successfully included at 30 and 10% in catfish and tilapia diets respectively, whilst complete fish meal substitution was achieved in abalone diets, at 14% dietary inclusion. The replacement of fish oil with insect oil resulted in a notable alteration in the fatty acid (FA) profile, leading to an increase in the concentration of lauric acid in catfish and trout fillets by roughly 4% and 6% respectively. The present discourse examines the application of dietary chitinase as a potential strategy for augmenting the usage of insect-derived products. Additionally, the adverse effects of dietary chitinase on the water stability of feeds intended for slow-feeding animals, including abalone, are explored. There is a great body of research presented that explores the application of insect protein hydrolysates as a viable and value-added alternative to traditional fish meal and insect meal.
Furthermore, this study also addresses practical concerns pertaining to the inclusion of insect products in formulations, taking into account the many potential limitations and constraints. Moreover, the cost aspects associated with incorporating insect products as functional ingredients and fish meal alternatives are also examined and analysed. This study considers the impact of rearing substrate and harvesting age on the variability of nutrient content in insect products. Additionally, it examines the challenges faced in the market when incorporating insect meal into aquafeeds, with a specific emphasis on constant supply, regulatory constraints and the cost-effectiveness of aquafeeds derived from insects. Lastly, current research methodology is discussed, with a key focus on shortcomings and considerations when interpreting study results for practical application.