Vols. for 1958- issued by the Association for the Study of Animal Behavior; 1958 with the Section of Animal Behavior and Sociobiology of the Ecological Society of America; 1959-64 with the Section of Animal Behavior and Sociobiology of the Ecological Society of America and the Division of Animal Behavior and Sociobiology of the American Society of Zoologists; and 1965- with the Animal Behavior Society.