The last decade has seen radical changes in our understanding of the behavior and ecology of seals, whales, and dolphins. This timely volume addresses subjects of critical importance to the field, with outstanding contributions from scientists actively involved in marine mammal research. Topics include the application of modern genetics to understanding populations and their social structure, the development of new methods of diet analysis, and the application of microelectronics to questions concerning the distribution, abundance, foraging behavior, and diving physiology of marine mammals. Scientists and students studying marine mammalogy, population ecology, and animal behavior--as well as fisheries biologists and mammalian conservationists--will welcome this exciting new contribution to the field.