Fishmeal has been the primary source of protein in aquafeed, which is becoming increasingly scarce and expensive. Insects are rich in protein and a number of essential amino acids recommending them as alternative to traditional animal feeds.
The yellow mealworm (Tenebrio molitor) meal considered for partial replacement of protein in fish diets is usually prepared by drying and grinding of the whole larvae.
ŸnMealTM is prepared from defatted larvae, increasing the protein content of the product up to 70%.
Trial conducted on whiteleg shrimp (Litopenaeus vannamei) showed that introduction of ŸnMealTM into the diet, up to 50 %, is beneficial for weight gain. In addition, substantial increase of the phenol oxidase activity was recorded (increase by 400 %), proving impressive immunostimulant property. In case of rainbow trout (Oncorhynchus mykiss) the feed can be fully replaced by ŸnMealTM reducing the growth time by 33 %.