Animal production, the subject of this article ... Alternatively, production is P = I - F - R. Most energy flow diagrams in textbooks show production flowing from one trophic level into another.

Energy flow diagrams often depict secondary production ... vary greatly depending on the type of food ingested (e.g., animal food v. detritus). The relative amount of each food type assimilated ...

The way energy passes through an ecosystem is described as energy flow. Herbivores (plant eating animals) are primary consumers. Carnivores (animals who eat other animals) are secondary consumers ...