Concepts

The hypothesis that animals allocate less time to antipredator vigilance as a function of increasing numbers of animals foraging together

Individuals in more tightly connected social groups perceive greater security from predators and allocate less time to antipredator vigilance while foraging

Hypothesis that highly aroused animals produce nonlinear vocalizations because they lose control of their larynx over vocal fold production apparatus

Explains how acoustic signal structure is shaped by habitat-driven selection that enhances the propagation of relatively undegraded vocalizations

Hypothesis that populations may be buffered from adverse climatic effects when vital rates with high impacts on population growth exhibit the least temporal variability

Assumes that antipredator adaptations evolve together and thus prey may respond to extinct predators as long as they have experience with other predators.