A typical example of this kind of relationship is the predator-prey relationship.

As an example, a balanced predator-prey relationship is nearly impossible to maintain in even the largest aquaria.

And, of course, they want to show both sides of the predator-prey relationship.

That was why I began, five years ago, to model predator-prey relationships as a way to keep goals fixed.

The problem is that food chains grossly oversimplify predator-prey relationships.

Food webs are a better representation of predator-prey relationships.

Here was a predator-prey relationship, of a weird kind.

We evolved ourselves in a kind of social one-upping, predator-prey relationship?

Overwhelmingly, the most common function of colour is in predator-prey relationships.

We had our own case of the freak suspension of the predator-prey relationship.