D. von Holst, The Concept of Stress and Its Relevance for Animal Behavior; V. Apanius, Stress and Immune Response; P.A. Parsons, Behavioral Variability and Limits to Evolutionary Adaptation under Stress; A.P. Møller, Developmental Instability as a General Measure of Stress; S.L. Lima, Stress and Decision-Making under the Risk of Predation: Recent Developments from Behavioral, Reproductive, and Ecological Perspectives; G.A. Lozano, Parasitic Stress and Self-Medication in Wild Animals; R. Thornhill and F.B. Furlow, Stress and Human Behavior: Attractiveness, Women's Sexual Development, Postpartum Depression, and Baby's Cry; D.M. Broom, Welfare, Stress, and the Evolution of Feelings; H. Hofer and M.L. East, Biological Conservation and Stress; Chapter References; Subject Index.