| The research project LeTe-Protein has already demonstrated how high-quality regional protein sources can be obtained from residual materials. Feeding trials with brook trout showed no differences in acceptance or growth between the experimental feed and conventional fish feed. Building on these findings, the ReProtein project pursues a resource-efficient approach by using previously evaluated plant-based by-products to generate sustainable protein sources from mealworm larvae and duckweed for aquaculture.
The project’s main objective is to strengthen the regional fish production cycle and enhance the resilience of local feed supply chains.
Initial feeding trials with mixtures of mealworm larvae and duckweed yielded promising results. For brook trout, the duckweed-based feed led to a noticeable green coloration. Long-term trials with WALDLAND African catfish aim to further evaluate the suitability of these feed mixtures. In parallel, the efficiency of protein extraction from duckweed and its potential for heavy metal accumulation are being investigated.
Another focus is on protein usage from mealworm larvae, which are considered suitable for fish nutrition due to their favourable fatty acid profile. Feeding the larvae with linseed increases their omega‑3 content. Long-term trials will assess the effectiveness of these feed mixtures with WALDLAND African catfish.
The project explores sustainable, regional alternatives to fishmeal in aquafeeds. The integrated production of duckweed and mealworm larvae within a circular system holds significant potential for generating high-value proteins from regional raw materials. These innovative approaches aim to strengthen local value chains and reduce international dependencies.
A key ecological benefit lies in the substantial CO₂ savings achieved through short transport routes and the utilization of regional by-products. The project serves as a model for circular economy in aquaculture, demonstrating how sustainability, innovation, and regional economic development can be effectively combined. |