LokaLaStern

The aim is to develop a nutrient-optimized feed that is entirely produced with regionally sourced raw materials. Main components are mealworm larvae, regional legumes, and starfish meal.

In this project a nutrient-optimized feed for trout (Oncorhynchus mykiss) is beeing developed that is primarily based on regional resources. The feed is specifically produced to match requirements for recirculating aquaculture systems (RAS). Main components are optimized insect protein, regionally produced legumes and marine boosters such as starfish (Asterias rubens) meal. Mealworm larvae are therefore raised on selected substrates from regional sidestreams to enrich the insects with amino-, and fatty acids relevant for trout nutrition. Locally grown legumes are used to replace globally traded soy products. Underutilized marine raw materials, such as starfish meal, are included to additionally supply missing micronutrients, enhance palatability and improve the physical stability of the feed. The sinking behaviour of the feed, its water stability, the retention time in the fish, and the faecal stability are relevant parameters to minimize the overall nutrient loss and water consumption of RAS.

This project is an IGF funded project. The pre-competitive IGF builds a bridge between fundamental research and commercial application and offers SMEs access to the latest scientific findings. 

The project is being carried out by three research institutions: The International Research Association Feed Technology e.V. (IFF), University of Applied Sciences Bremerhaven (HSB), and the Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research (AWI).These institutes complement each other excellently to successfully fulfill the aforementioned project goals. The work is accompanied by a committee consisting of companies (and other stakeholders), in particular SMEs with an economic interest in the content of this project.

Project steps:

• The mealworm larvae culture is first optimized and then scaled at the HSB to produce insect biomass needed for the following project steps.
• Feeds based on regional raw materials are formulated at the AWI to match the specific nutrient requirements of trout.
• Optimized processing methods are evaluated at the IFF to produce feed pellets with the desired physical properties for trout production in RAS.
• Feeding trials are conducted at AWI to determine the digestibility of the feeds, fish growth performance, and the nutritional and health status of the trout that received the newly developed feed.
• Finally, a life cycle analysis is carried out to determine the sustainability of the feed.