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ADAPTIVE CHANGES IN ANTIPREDATOR BEHAVIOR OF A GRASSHOPPER DURING DEVELOPMENT

Insects often undergo major physiological, morphological, habitat, and behavioral changes as they mature. For many insects, developing individuals may experience a series of different selective regimes. For obvious reasons, predation risk is likely to change with the age of prey. One set of evolutionary consequences of predation, counter-adaptation by the prey (Smith, 1974), may take different forms in response to differing predation pressures. This report focuses on systematic changes in the predator avoidance tactics of a South American bush-dwelling grasshopper during its ontogeny.