Biologists have long realized that an individual's reproductive success measured over its entire lifetime is an important component of its fitness. Until recently, however, most of the available measures of breeding output have been restricted to particular breeding seasons, and have often involved unidentifiable individuals.
Thanks to long-term studies of marked individuals, information is now available on the lifetime reproduction of many bird species. This book brings together results from most of these studies and presents much new information and many new analyses of classic data sets. A wide variety of types of bird are represented, from small songbirds to seabirds, birds of prey and wildfowl. Important pointers emerge regarding the role of the individual in population processes and the factors which affect individual performance in the wild. The effects of age and experience on breeding success and survival prospects are also assessed, and the question of senility is discussed.