High-Protein Diet: Brown trout require a protein-rich diet (40-50%), especially during early growth stages. Protein sources include fish meal, fish oil, and plant-based alternatives like soybean meal.
Fats and Energy Needs: A diet containing 15-20% fat supports energy metabolism and healthy growth.
Essential Nutrients: Brown trout require a balanced supply of vitamins (A, D, B-complex) and minerals (calcium, phosphorus, and selenium) for optimal health.
Natural and Supplementary Feeding: In extensive systems, they consume insects, crustaceans, and small fish. In aquaculture, they are fed specialized pelleted diets to ensure rapid growth and good health.