Metabolomic and transcriptomic profiling reveals the effect of dietary protein and lipid levels on growth performance in loach ().

The subject of this study was to explore the optimum requirements of loach () regarding dietary proteins and lipids and discuss the underlying mechanism. We designed nine diets to determine the effects of different levels of dietary crude protein (CP: 30%, 35%, and 40%) and ether extract (EE: 6%, 10%, and 14%) on the growth performance and metabolism of . In total, 2160 healthy (5.