Amino acids are major energy substrates for tissues of hybrid striped bass and zebrafish

Fish generally have much higher requirements for dietary protein than mammals, and this long-standing puzzle remains unsolved. The present study was conducted with zebrafish (omnivores) and hybrid striped bass (HSB, carnivores) to test the hypothesis that AAs are oxidized at a higher rate than carbohydrates (e.g., glucose) and fatty acids (e.g., palmitate) to provide ATP for their tissues. Liver, proximal intestine, kidney, and skeletal muscle...