However, the line of argument given above is incorrect and logically insufficient to establish the claimed result. The structural problems in the above type of argument are addressed in later sections. This section will focus specifically on the issue of ape diets. Thus, omnivorous primates are mainly frugivorous and, depending upon body size, obtain most of their protein from insects and leaves. In all large, omnivorous, nonhuman primates, animal protein is a very small but presumably necessary component of the diet.
Insect food is the predominant animal matter resource for primates.
Preference for animal matter seems confirmed. The response in Fit Food for Humanity to the information that anthropoid apes are not strict vegetarians could be characterized as reliance on outdated information, rationalizations, and hand- waving. Let's review some of the claims. Both lowland and mountain gorillas consume insects, deliberately and indirectly, that is, on the vegetation they consume. Insectivory by mountain gorillas is discussed further later in this section.