Prelude to the anthology in memory of Ronald Richard Nelson; T.C. Tricas, S.H. Gruber. Part 1: Biography and eulogy. Shark meets man: the research and academic life of Donald Richard Nelson (1937-1997); T.C. Tricas. Donald Richard Nelson: the most unforgettable character I ever met; S.H. Gruber. Part 2: Sensory biology and behavior. The acoustical biology of elasmobranchs; A.A. Myrberg, Jr. Morphology of the mechanosensory lateral line system in elasmobranch fishes: ecological and behavioral considerations; K.P. Maruska. The neuroecology of the elasmobranch electrosensory world: why peripheral morphology shapes behavior; T.C. Tricas. Comparative neurobiology of the elasmobranch cerebellum: theme and variations on a sensorimotor interface; J.G. New. Orientation and navigation in elasmobranchs: which way forward?; J.C. Montgomery, M.M. Walker. Surfactants as chemical shark repellents: past, present, and future; J.A. Sisneros, D.R. Nelson. Advances in the study of feeding behaviors, mechanisms, and mechanics of sharks; P.J. Motta, C.D. Wilga. A review of elasmobranch reproductive behavior with a case study on the nurse shark, Ginglymostoma cirratum; H.L. Pratt, Jr. & J.C. Carrier. Part 3: New techniques -- tagging, telemetry and movements. Shark tagging: a review of conventional methods and studies; N.E. Kohler, P.A. Turner. Review of elasmobranch behavioral studies using ultrasonic telemetry with special reference to the lemon shark, Negaprion brevirostris, around Bimini Islands, Bahamas; L.F. Sundstrom, et al. Thermal and bioenergetics of elasmobranchs: bridging the gap; C.G. Lowe, K.J. Goldman. Ultrasonic telemetry, tracking and automated monitoring technology for sharks; F.A. Voegeli, et al. Archival tagging of school shark, Galeorhinus galeus, in Australia: initial results; G.J. West, J.D. Stevens. Telemetry and satellite tracking of whale sharks, Rhincodon typus, in the Sea of Cortez, Mexico, and the north Pacific Ocean; S.A. Eckert, B.S. Stewart. Species and subject index.