The biochemical composition of chyme in fish species with different diets

The chyme contents of the main biochemical components in fish with different diets vary. Proteins are dominant in the chyme of piscivorous fish (burbot and pike). In the chyme of benthivores (roach and bream), ash is the dominating component. Typical for all fish is the descending lipid gradients with maxima in the proximal section and the ascending ash gradients with maxima in the distal section. The maximum amount of protein was found in the medial part of the intestine. As a rule, there are higher contents of lipids in the chyme of the proximal section and proteins in the chyme of the medial section than in the whole body of fish prey.