LokaLaStern

The aim of this project is to develop a nutrient-optimized feed for trout (Oncorhynchus mykiss) in recirculation systems based on regional sources. This will be based on optimized insect protein, regionally produced legumes and starfish meal as a marine booster.

The amino acid composition of the insect protein from mealworm larvae (Tenebrio molitor) is to be adapted to the nutritional requirements of trout using suitable substrates from regional residual streams from the food industry. Regionally grown legumes will replace soy products and starfish meal (Asterias rubens) will be used as a supplier of micronutrients, amino acid supplement and physical stabilizer in the feed. Particular attention is paid to the physical properties of the feed pellets. The sinking behaviour of the feed, water stability, retention time in the fish and faecal stability are to be optimized in order to minimize nitrogen loss and discharge.

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

The Internationale Forschungsgemeinschaft Futtermitteltechnik e.V. the Bremerhaven University of Applied Sciences and Alfred Wegener Institute Helmholtz Center for Polar and Marine Research complement each other perfectly in terms of their expertise in order to carry out this project successfully. The work is accompanied by a committee consisting of companies (and other stakeholders), in particular SMEs with an economic interest in the project content.

Project steps:

- First, the quality of the mealworm larvae is optimized at Bremerhaven University of Applied Sciences, then produced in larger quantities and prepared for further processing.

- At the AWI, the sustainable feed from regional raw materials is adapted and formulated to meet the needs of the trout.

- At the IFF, tests are carried out to achieve the best possible quality of the feed pellets using extrusion.

- Feeding trials and the analysis of digestibility, growth, nutritional and health status and thus the suitability of the feed are carried out at the AWI.

- Finally, a life cycle analysis is carried out to determine the sustainability of the feed.