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Author: Harald H. Roth Publisher: Springer Science & Business Media ISBN: 3662033844 Category : Science Languages : en Pages : 424
Book Description
The general interest and attention paid to the use of the renewable natural resources of the world have increased greatly during the last decades. This is due to the environmental dilemma into which mankind has got itself by the total disregard of ecological facts and laws, the underprizing of natural resources and the overemphasis on economic develop ment, coupled with unimpeded rapid population growth and the preponderance of material istic consumption-oriented attitudes. The management and use of natural resources such as forests, grasslands, rivers and lakes were formerly considered purely in a financial context, whereas latterly, a consciousness of their social function and the indirect economic benefits which can be derived from them has developed. Thus, as regards these traditional resources, multi-use concepts comprising eco nomically oriented utilisation as well as recreational, educational and social use have be come widely accepted. Conservation of natural resources for sustainable consumptive as well as non-consumptive uses has been recognised as a key element for maintaining eco nomic development all over the world. Fortunately, the industrialised countries have started to apply this principle themselves and in their technical and financial aid to the developing Third World countries. This is manifest from policy documents such as the World Bank Policy on Development of Wild Lands, issued in 1987.
Author: Harald H. Roth Publisher: Springer Science & Business Media ISBN: 3662033844 Category : Science Languages : en Pages : 424
Book Description
The general interest and attention paid to the use of the renewable natural resources of the world have increased greatly during the last decades. This is due to the environmental dilemma into which mankind has got itself by the total disregard of ecological facts and laws, the underprizing of natural resources and the overemphasis on economic develop ment, coupled with unimpeded rapid population growth and the preponderance of material istic consumption-oriented attitudes. The management and use of natural resources such as forests, grasslands, rivers and lakes were formerly considered purely in a financial context, whereas latterly, a consciousness of their social function and the indirect economic benefits which can be derived from them has developed. Thus, as regards these traditional resources, multi-use concepts comprising eco nomically oriented utilisation as well as recreational, educational and social use have be come widely accepted. Conservation of natural resources for sustainable consumptive as well as non-consumptive uses has been recognised as a key element for maintaining eco nomic development all over the world. Fortunately, the industrialised countries have started to apply this principle themselves and in their technical and financial aid to the developing Third World countries. This is manifest from policy documents such as the World Bank Policy on Development of Wild Lands, issued in 1987.
Author: Todd J. Braje Publisher: Univ of California Press ISBN: 0520267265 Category : Nature Languages : en Pages : 328
Book Description
“The bones recovered from the middens of the northeastern Pacific shorelines have important stories to tell biologists, marine mammalogists, and those concerned with marine conservation. This volume unearths a wealth of information about the historical ecology of seals, sea lions, and sea otters in the North Pacific that spans thousands of years. It provides fascinating insights into how the world once looked, and how it may one day look again as seals, sea lions, and sea otters reclaim and recolonize their former haunts.”—Andrew Trites, Director, Marine Mammal Research Unit, University of British Columbia “Braje and Rick have assembled a compelling set of case studies on the long-term and complex interactions between people, marine mammals, and environments in the Northeast Pacific. The promise of zooarchaeology as historical science is on full display, as researchers use geochemistry, aDNA, morphometrics, and traditional analytic methods to address questions of utmost importance to the long-term health of coastal ecosystems. If this book doesn't convince conservation biology about the need to take the long view of animal histories and ecosystems into account in developing conservation management plans, I'm not sure what will.”—Virginia L. Butler, Department of Anthropology, Portland State University
Author: Burney J. Le Beouf Publisher: Univ of California Press ISBN: 0520328159 Category : Science Languages : en Pages : 434
Book Description
The largest of all seals, elephant seals rank among the most impressive of marine mammals. They are renowned for their spectacular recovery from near-extinction at the end of the nineteenth century when seal hunters nearly eliminated the entire northern species. No other vertebrate has come so close to extinction and made such a complete recovery. The physiological extremes that elephant seals can tolerate are also remarkable: females fast for a month while lactating, and the largest breeding males fast for over one hundred days during the breeding seasons, at which times both sexes lose forty percent of their body weight. Elephant seals dive constantly during their long foraging migrations, spending more time under water than most whales and diving deeper and longer than any other marine mammal. This first book-length discussion of elephant seals brings together worldwide expertise from scientists who describe and debate recent research, including the history and status of various populations, their life-history tactics, and other findings obtained with the help of modern microcomputer diving instruments attached to free-ranging seals. Essential for all marine mammalogists for its information and its methodological innovations, Elephant Seals will also illuminate current debates about species extinctions and possible means of preventing them. This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1994.
Author: S. Morand Publisher: Springer Science & Business Media ISBN: 4431360255 Category : Science Languages : en Pages : 640
Book Description
This book provides a comprehensive survey of the diversity and biology of metazoan parasites affecting small mammals, of their impact on host individuals and populations, and of the management implications of these parasites for conservation biology and human welfare. Designed for a broad, multidisciplinary audience, the book is an essential resource for researchers, students, and practitioners alike.
Author: Karl W. Kenyon Publisher: ISBN: Category : Northern fur seal Languages : en Pages : 86
Book Description
Introduction. Sources and methods ; Counts and measurements of seals ; Age determination -- Components of the herd. Bulls ; Bachelors ; Pups ; Cows ; Yearlings -- Present size of the herd. Life habits ; Estimate of the size of the herd from the trend of the commercial harvest ; Estimate of the size of the herd from the trend of the harem bull count -- Appendix A. Effect of sealing on fluctuations in herd size 1786-1951 -- Appendix B. Fecundity of males -- Appendix C. Size of the average harem -- Appendix D. Age criteria for bachelor fur seals -- Appendix E. Escapement of bachelors from the commercial kill -- Appendix F. Calculations for the size of the pup class in 1947 from tag recoveries -- Appendix G. Serial photography on the Pribilofs.
Author: Paul J. B. Hart Publisher: John Wiley & Sons ISBN: 0470693134 Category : Technology & Engineering Languages : en Pages : 424
Book Description
Recent decades have witnessed strong declines in fish stocks around the globe, amid growing concerns about the impact of fisheries on marine and freshwater biodiversity. Fisheries biologists and managers are therefore increasingly asking about aspects of ecology, behaviour, evolution and biodiversity that were traditionally studied by people working in very separate fields. This has highlighted the need to work more closely together, in order to help ensure future success both in management and conservation. The Handbook of Fish Biology and Fisheries has been written by an international team of scientists and practitioners, to provide an overview of the biology of freshwater and marine fish species together with the science that supports fisheries management and conservation. This volume, subtitled Fisheries, focuses on a wide range of topics, including the history of fisheries science, methods of capture, marketing, economics, major models used in stock assessments and forecasting, ecosystem impacts, marine protected areas and conservation. It builds on material in Volume 1, Fish Biology, which ranges from phylogenetics and biogeography to physiology, recruitment, life histories, genetics, foraging, reproductive behaviour and community ecology. Together, these books present the state of the art in our understanding of fish biology and fisheries and will serve as valuable references for undergraduates and graduates looking for a comprehensive source on a wide variety of topics in fisheries science. They will also be useful to researchers who need up-to-date reviews of topics that impinge on their fields, and decision makers who need to appreciate the scientific background for management and conservation of aquatic ecosystems. To order volume II, go to the box in the top right hand corner. Alternatively to order volume I, go to: http://www.blackwellpublishing.com/book.asp?ref=0632054123 or to order the 2 volume set, go to: http://www.blackwellpublishing.com/book.asp?ref=0632064838. Provides a unique overview of the study of fish biology and ecology, and the assessment and management of fish populations and ecosystems. The first volume concentrates on aspects of fish biology and ecology, both at the individual and population levels, whilst the second volume addresses the assessment and management of fish populations and ecosystems. Written by an international team of expert scientists and practitioners. An invaluable reference tool for both students, researchers and practitioners working in the fields of fish biology and fisheries.
Author: Alan D. McMillan Publisher: National Library of Canada = Bibliothèque nationale du Canada ISBN: 9780612169951 Category : Indians of North America Languages : en Pages : 353
Author: Henry W. Elliott Publisher: Forgotten Books ISBN: 9780266277194 Category : Reference Languages : en Pages : 264
Book Description
Excerpt from A Statement Submitted in Re the Fur-Seal Herd of Alaska: To the House Committee on Expenditures in the Department of Commerce What was and is the cause of this practical extinction of the virile male life on the breeding grounds of the Pribilof Islands? It is due wholly to the killing of all the young male seals that the lessees could annually find on the islands, first begun in 1896, in violation of regulations or the Carlisle rules of May 14, 1896, and then continued 11 to 1904, when the Hitchcock rules of May 1 were published, but w ich the lessees nullified completely by 1906, and continued to do so to the end of their lease, May 1, 1910. A plain statement of the facts which were given to Mr. F. H. Hitchcock, chief clerk of the Department of Commerce and Labor, ' and upon which he ordered the Hitchcock rules of 1904, is of interest at this point, to wit: On January 8, 1904, I gave him the fol lowing analysis of the reason why he must step in at once and check that close killing of all the young male seals Which his agents then were permitting the lessees to take or face the complete extinction of the breeding male life on the islands by 1907 or 1908: On the seal island rookeries of St. Paul and St. George there were (i wrote thus) In 1872 - 1874 there were some breeding bulls and cows (primipares, multipares, and nubiles), showing a birth rate of pups. In 1890 this herd was reduced to some breeding bulls and about 420 000 cows (primipares, multipares, and nubiles), showing a birth rate of pups. In 1896 this herd was still further reduced to some bulls and about cows (primipares, multipares, and nubiles), showing a birth rate of pups. In 1903 this herd is reduced to some bulls and about cows (primipares, multipares, and nubiles), showing a birth rate of pups. These breeding bulls of 1903 are the survivors of those young males which were spared in 1890 and by the modus vivendi of 1891 - 1893, and thus allowed to grow up to the age of 6 years, and then take their places in 1894, 1895, and 1896 on the rookeries as 6 and 7 year old seecatchie. In 1894 and in 1895 a few hundred 4-year-olds may have escaped the club on the killing grounds and thus came in as 6 - year-olds in 1896 and 1897. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Bernd Würsig Publisher: Springer ISBN: 3030166635 Category : Science Languages : en Pages : 508
Book Description
This book concentrates on the marine mammalian group of Odontocetes, the toothed whales, dolphins, and porpoises. In 23 chapters, a total of 40 authors describe general patterns of ethological concepts of odontocetes in their natural environments, with a strong bent towards behavioral ecology. Examples are given of particularly well-studied species and species groups for which enough data exist, especially from the past 15 years. The aim is to give a modern flavor of present knowledge of ethology and behavior of generally large-brained behaviorally flexible mammals that have evolved quite separately from social mammals on land. As well, the plight of populations and species due to humans is described in multiple chapters, with the goal that an understanding of behavior can help to solve or alleviate at least some human-made problems.
Author: Harald H. Roth
Author: Harald H. Roth
Author: Todd J. Braje
Author: Burney J. Le Beouf
Author: S. Morand
Author: Teresa Clocksin
Author: Karl W. Kenyon
Author: Paul J. B. Hart![Since Kwatyat Lived on Earth [microform] : an Examination of Nuu-chah-nulth Culture History PDF](https://books.google.com/books/content/images/frontcover/p8eItgAACAAJ?fife=w80-h100)
Author: Alan D. McMillan
Author: Henry W. Elliott
Author: Bernd Würsig