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Curassaows, Guans, and Chachalacas: Status Survey and Conservation Action Plan for Cracids 2000-200
Avian Biology,Volume VIII assesses selected aspects of avian biology. It is generally the conceptual descendant of Marshall's earlier treatise,"Biology and Comparative Physiology of Birds, but is more than simply a revision of it. This volume consists of two relatively lengthy, diverse chapters that focus on adaptive significance of coloniality in birds and fossil records of birds. In particular, this volume looks into group phenomena related to central place systems, that is, systems in which one or more individuals move to and from a centrally located place in the course of daily activities. It also addresses selective factors that have been suggested to explain why individuals should form colonies rather than disperse within the available foraging space. This book will be useful as a reference material for advanced students and instructors in this field of interest.
Two rather different elements combine to explain the origin of this volume: one scientific and one personal. The broader of the two is the scientific basis-the time for such a volume had arrived. Geology had made remarkable progress toward an understanding of the phys ical history of the Caribbean Basin for the last 100 million years or so. On the biological side, many new discoveries had elucidated the distributional history of terrestrial orga nisms in and between the two Americas. Geological and biological data had been combined to yield the timing of important events with unprecedented resolution. Clearly, when each of two broad disciplines is making notable advances and when each provides new insights for the other, the rewards of cross-disciplinary contacts increase exponentially. The present volume represents an attempt to bring together a group of geologists, paleontologists and biologists capable of exploiting this opportunity through presentation of an interdisciplinary synthesis of evidence and hypothesis concerning interamerican connections during the Cretaceous and Cenozoic. Advances in plate tectonics form the basis for a modern synthesis and, in the broadest terms, dictate the framework within which the past and present distributions of organisms must be interpreted. Any scientific dis cipline must seek tests of its conclusions from data outside of its own confines.
Drawing on the knowledge and insight gained from a lifetime of watching, studying, and enjoying birds, this book is full of information about more than four hundred species of birds in Texas, most all of which author Gary Clark has seen first hand. Organized in the standard taxonomic order familiar to most birders, the book is written in a conversational tone that yields a wide-ranging discussion of each bird’s life history as well as an intimate look at some of its special characteristics and habits. Information regarding each species’ diet, voice, and nest is included as well as when and where it can be found in Texas. Magnificent photographs by Kathy Adams Clark accompany each bird’s entry. For those just beginning to watch birds to those who can fully relate to the experiences and sentiments communicated here by a veteran birder, this book reveals the kind of personal connection to nature that careful attention to the birds around us can inspire.
The diversity of living forms and the unity of evolutionary processes are the focus of these essays. The collection helps form much of the basis of contempoary undertanding of evolutionary biology.
971 references on wild foods in agricultural systems are selected with the intention to provide an indication of the range of research carried out on this subject, highlighting key themes of policy interest. The bibliography is organised into a number of different thematic sessions. Each session starts with an introduction with references to major issues in the literature and areas where questions remain unanswered. Each reference is provided with an abstract. Three indices are given: a regional index, an ethnic groups index and a thematic index