Avian Territory Mapping
Author | : James S. Wakeley |
Publisher | : |
Total Pages | : 20 |
Release | : 1987 |
Genre | : Bird populations |
ISBN | : |
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Author | : James S. Wakeley |
Publisher | : |
Total Pages | : 20 |
Release | : 1987 |
Genre | : Bird populations |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 16 |
Release | : 1987 |
Genre | : |
ISBN | : |
This report on avian territory mapping is provided as Section 6.3.4 of the US Army Corps of Engineers Wildlife Resources Management Manual. The report is designed to assist the District or project biologist in the application of territory mapping to estimate the density and diversity of breeding bird populations for planning, management, and research purposes. The mapping method involves repeated visits to a relatively small study plot where observations of territorial songbirds are recorded on gridded maps. For each species, population density is determined by counting the number of occupied territories. The report presents guidelines concerning plot size and shape, plot maps, number of visits, survey timing and procedures, and interpretation of results.
Author | : Mary Elizabeth Nevers |
Publisher | : |
Total Pages | : 114 |
Release | : 1981 |
Genre | : Bird populations |
ISBN | : |
Author | : Colin J. Bibby |
Publisher | : Elsevier |
Total Pages | : 324 |
Release | : 2000-08-15 |
Genre | : Juvenile Nonfiction |
ISBN | : 9780120958313 |
In this book there are entire chapters devoted to the most widely used bird counting techniques, and attempts to amalgamate other counting methodologies into major groups were made. Examples of the use of methods are provided wherever possible and the relative value of various approaches for answering specific questions is also addressed. A newly revised edition of the immensely successful Bird Census Techniques An entirely new chapter covering the census methods recommended for tropical habitats Provides a concise guide to various census techniques and their opportunities and pitfalls
Author | : Thomas Gottschalk |
Publisher | : diplom.de |
Total Pages | : 102 |
Release | : 2014-04-11 |
Genre | : Political Science |
ISBN | : 3836609622 |
Inhaltsangabe:Introduction: Over 10% (1186 species) of the bird species in the world are threatened with extinction in the near future, almost all of them due to habitat change or loss by man. Likewise, 1130 mammals, 296 reptiles, 146 amphibians and 5611 plants have been identified as endangered species. The destruction of natural habitat is the major factor contributing to the global species extinction event. The increasing loss of biodiversity has centred on conducting inventories and monitoring species and habitats, especially in identifying areas of high species richness, threatened species and species of restricted or local distribution. In 1992 the UNCED-Conference in Rio de Janeiro pointed out the need for monitoring the environment, leading to the Convention on Biological Diversity and the Agenda 21. Article 7 of the Convention on Biological Diversity deals with identification and monitoring, which are to be undertaken with sampling and other techniques. New methodologies with a view to undertaking systematic sampling and evaluation of the components of biological diversity are to be developed. While the number of identified threatened species has increased dramatically, a huge gap in knowledge of ecosystems and their fauna and flora remains. Distribution, status and ecology of species are mostly unknown in many countries, as is the degree they are endangered. In view of the immense unknown ecosystems in the world, a great number of which are located in developing countries, conventional survey and mapping methods cannot deliver the necessary information in a timely and cost-effective fashion. Nature conservation will require large volumes of Remote Sensing (RS) data if the quality of planning is to improve. With RS technology, we may be able to make real progress in understanding why more species occur in some places than in others and in identifying the most critical places that must be protected to preserve the maximum number of species into the 22nd century and beyond. As current air photos are often not available, satellite images are the sole source of data for many regions of the world. Fortunately, computer technology has improved enormously in the last years, mainly processing time, storage requirements as well as programme features and possibilities. Concurrent declining costs of computer hardware have favoured the design of new techniques for special data processing and combining remotely sensed information with other extensive [...]
Author | : Colin J. Bibby |
Publisher | : Academic Press |
Total Pages | : 276 |
Release | : 2012-12-02 |
Genre | : Science |
ISBN | : 0080984509 |
Wild birds are counted for a wide variety of reasons and by a bewildering array of methods. However, detailed descriptions of the techniques used and the rationale adopted are scattered in the literature, and the newcomer to bird census work or the experienced bird counter in search of a wider view, may well have difficulty in coming to grips with the subject as a whole. While not an end in itself, numerical and distributional census work is a fundamental part of many scientific and conservation studies, and one in which the application of given standards is vital if results are not to be distorted or applied in a misleading way. This book provides a concise guide to the various census techniques and to the opportunities and pitfalls which each entails. The common methods are described in detail, and illustrated through an abundance of diagrams showing examples of actual and theoretical census studies. Anyone with a bird census job to plan should be able to select the method best suited to the study at hand, and to apply it to best effect within the limits inherent in it and the constraints of the particular study. The Royal Society for the Protection of Birds and the British Trust for Ornithology have for many years pioneered the collaboration of amateurs and professionals in various census studies. Three members of their staff, each with extensive field experience, now pool the knowledge of these investigations to lay the groundwork for sound census work in future years.
Author | : Ian Newton |
Publisher | : Academic Press |
Total Pages | : 609 |
Release | : 1998-04-08 |
Genre | : Technology & Engineering |
ISBN | : 0080879233 |
This book meets the demand for a comprehensive introduction to understanding the processes of population limitation. Recognized world-wide as a respected biologist and communicator, Dr. Ian Newton has now written a clear and detailed treatise on local scale population limiting factors in birds. It is based almost entirely on results from field studies, though it is set in a contemporary theoretical framework. The 16 chapters fall under three major section headings: Behavior and Density Regulation; Natural Limiting Factors; and Human Impacts. Population Limitation in Birds serves as a needed resource expanding on Dr. David Lacks research in this area of ornithology in the 1950s. It includes numerous line diagrams and beautiful illustrations by acclaimed wildlife artist Keith Brockie. Provides a sorely needed introduction to a long-established core subject in ornithology Focuses on local scale factors Written by a well-known biologist and effective communicator Includes numerous line diagrams and beautiful illustrations by acclaimed wildlife artist Keith Brockie
Author | : |
Publisher | : |
Total Pages | : 52 |
Release | : 1993 |
Genre | : Bird populations |
ISBN | : |
Author | : Wayne R. Petersen |
Publisher | : Univ of Massachusetts Press |
Total Pages | : 476 |
Release | : 2003 |
Genre | : Nature |
ISBN | : 1558494200 |
In 1974, the Massachusetts Audubon Society and the Massachusetts Division of Fisheries and Wildlife launched a five-year survey to map the distribution of all the birds that breed in the Commonwealth - the first such comprehensive effort in North America. Nearly 600 volunteers spent countless hours in the field collecting data. This landmark volume presents the results of their efforts. The book includes distribution maps showing possible, probable, and confirmed breeding areas for 198 Massachusetts nesting species on a grid of 989 tensquare-mile blocks. Opposite each species map is a summary account giving historical perspective, relative abundance, habitat, seasonal schedule, nest, egg, and song descriptions, clutch size, egg dates, number of broods, and other pertinent details. Each species account is illustrated with a scrupulously accurate, watercolor portrait by award-winning nature artists John Sill and Barry Van Dusen. The book also includes a set of six transparent overlay maps in an attached pocket that allow the reader to correlate key environmental factors with the distribution of nesting species. Introductory sections describe the atlas survey methodology, and two appe
Author | : Richard Johnston |
Publisher | : Springer Science & Business Media |
Total Pages | : 372 |
Release | : 2013-11-11 |
Genre | : Science |
ISBN | : 1461323851 |
It is not often that a century of scholarly activity breaks conveniently into halves, but ornithology of the first half of the 20th century is clearly different from that of the second half. The break actually can be marked in 1949, with the appearance of Meyer and Schuz's Ornithologie ais Biologische Wissenschaft. Prior to this, ornithologists had tended to speak mostly to other ornithologists, experiments (the testing of hy potheses) were uncommon, and a concern for birds as birds was the dominant thread in our thinking. Subsequent to 1949, ornithologists have tended to become ever more professional in their pursuits and to incorporate protocols of experimental biology into their work; more importantly perhaps, they have begun to show a concern for birds as agencies for the study of biology. Many of the most satisfying of recent ornithological studies have come from reductionist research ap proaches, and have been accomplished by specialists in such areas as biochemistry, ethology, genetics, and ecology. A great many studies routinely rely on statistical hypothesis testing, allowing us to come to conclusions unmarred by wishful thinking. Some of us are ready to tell the world that we are a "hard" science, and perhaps that time is not so very far off for most of us. Volume 2 examines several solid examples of late 20th-century ornithology.