Download or read book A Population Study of the Alaska Fur seal Herd written by Karl W. Kenyon and published by . This book was released on 1954 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Population Study of the Alaska Fur Seal Herd written by U.S. Fish and Wildlife Service and published by . This book was released on 1951 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Story of the Pribilof Fur Seals written by and published by . This book was released on 1972 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population dynamics of the Alaska fur seal herd written by D.G. CHAPMAN and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book History of Scientific Study and Management of the Alaskan Fur Seal Callorhinus Ursinus 1786 1964 Classic Reprint written by Victor B. Scheffer and published by Forgotten Books. This book was released on 2018-02-03 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from History of Scientific Study and Management of the Alaskan Fur Seal, Callorhinus Ursinus, 1786-1964 Nevertheless, the managing agency - the u.s. Department of the Interior4 - will continue to be faced with problems of a diplomatic nature rising from the fact that all Alaskan fur seals feed at times in international waters. A few actually land on foreign soil. Research on the Alaskan seal population has been carried out since the early 1890's on efforts to manage it, not only as a national but also as an international resource. The Department can also expect to face local problems ris ing from the fact that the welfare of seals and the welfare of people are not always compatible. Certain areas of conflict are illustrated by the following questions: Is predation by seals upon commercial fishes of the eastern North Pacific Ocean and Bering Sea economically important? Should tourism to the seal-breeding grounds be encouraged? How can the future livelihood of the people of the Pribilof Islands be ensured when their population is outgrowing its local base of support (the seal harvest)? What should be the respective roles of the Federal Government and the State of Alaska in conserving the seal herd? The purpose of the present history is to trace the evolution of zoological research on the fur seals, to discuss the origin and development of research ideas and techniques, and to point out the contributions of research to the present manage ment structure. In discussing past research, we will describe not only scientific studies but also changes in fur seal manage ment and fur seal legislation which have, from time to time, made the studies necessary. 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.
Download or read book North Pacific Fur Seals written by United States. National Advisory Committee on Oceans and Atmosphere and published by . This book was released on 1985 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Northern Fur Seal written by Ralph C. Baker and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Booklet describing early history of fur sealing; the distribution and movement of northern fur seals; Callorhinus Ursinus, their food, physical characteristics, reproduction and mortality and disease, management and research; sealing on the Pribilof Islands and processing and sale of fur seal skins.
Download or read book Report of the Workshop on the Status of Northern Fur Seals on the Pribilof Islands Alaska Held November 14 16 1983 Seattle Washington written by Charles Winsor Fowler and published by . This book was released on 1986 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fur Seal Industry of the Pribilof Islands 1786 1965 written by Francis Riley and published by . This book was released on 1967 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Statement Submitted in Re the Fur Seal Herd of Alaska to the House Committee on Expenditures in the Department of Commerce 1912 written by Henry Wood Elliott and published by . This book was released on 2008-06-01 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: This scarce antiquarian book is a facsimile reprint of the original. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions that are true to the original work.
Download or read book Setting the Annual Subsistence Harvest of Northern Fur Seals on the Pribilof Islands written by and published by . This book was released on 2005 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavior and Ecology of the Northern Fur Seal written by Roger L. Gentry and published by Princeton University Press. This book was released on 2014-07-14 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the behavior and ecology of the northern fur seal, this book is a model long-term study of marine mammals, one that tests theory through both observation of undisturbed behavior and manipulative experiments on individuals. Here Roger Gentry draws on nearly two decades of research on three different islands to show how behavior among these seals changes with population size, sex ratio, and environment, to explain the behavior of the population beginning with individuals, and to generalize the results to other members of the eared seal family. In so doing, he offers one of the most comprehensive studies of its kind on any marine mammal species to date. Gentry shows that the species is driven by very different behavioral traits than have been assumed for it in the past. His book analyzes behavior on scales of hours to lifetimes, investigates the mating system, considers processes that underlie the mating system (site fidelity, behavioral estrus, and the development of territoriality), and addresses specific aspects of maternal strategy (female attendance behavior, pup growth, seasonal influences, and the effects of continental shelf width). Gentry contributes to knowledge about marine mammals by providing a very specific basis for interspecies comparisons, and he suggests a link between population trend and environmental regime shifts. He also guides the debate over seal mating systems from an interpretive to an empirical or experimental basis. Originally published in 1997. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Download or read book The Fur Seals and Fur seal Islands of the North Pacific Ocean The history condition and needs of the herd of fur seals resorting to the Pribilof Islands written by David Starr Jordan and published by . This book was released on 1898 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fur seal Industry of Pribilof Islands Alaska written by Henry O'Malley and published by . This book was released on 1930 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Statement Submitted in Re the Fur Seal Herd of Alaska written by Henry W. Elliott and published by . This book was released on 2015-08-05 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Statement Submitted in Re the Fur-Seal Herd of Alaska: To the House Committee on Expenditures in the Department of Commerce Mr. Chairman and Gentlemen of the Committee: I desire to submit for your consideration a concise statement of facts, showing the history and condition of the fur-seal herd of Alaska, and the connection of the officers and stockholders of the North American Commercial Co., as lessees, and the officials of the United States Government and others therewith since 1890 to date. It is first in order to show how and why the fur-seal herd of Alaska has been commercially destroyed and ruined as an asset of value to the Government ever since 1890; I will lead by giving you a brief but carefully studied statement of the reasons why this herd has been reduced so as to be at the verge of complete extinction when the act of August 24, 1912, prevented that end. By order of this committee, a careful survey of the herd was made by Mr. Gallagher and myself last July. We have given you in our report of August 31 last an account in detail of its condition. The condition of this herd as we found it last July on its breeding rookeries of St. Paul and St. George Islands, Bering Sea, Alaska, is one of complete commercial ruin and of near extinction of virile breeding male life. Happily the act of August 24, 1912, prevents any repetition of the deadly killing of young male seals for the next five years on the islands, and makes it unnecessary to call upon Congress for any further legislation in the premises until the lapse of this close time thus provided for. It now becomes in order to clearly show how and why this herd of 4,700,000 seals in 1874 has been so managed by our own agents as to bring it to the pitiful limit of less than 1,500 breeding bulls in 1913, as contrasted with 90,000 in 1874 - with less than 30,000 non-breeding seals - yearlings and males, 2, 3, 4, 5, and up to 6 years old, against 1,250,000 of them in 1874, and less than 80,000 breeding cows as against 1,633,000 of them in 1874. It is an easy exhibition of cause which I am to give you, as follows: I. The fur seal by its law of life breeds but once a year, and then during one short period of that year only, viz, between July 4 and 25. II. This makes its order of life entirely different from cattle, sheep, horses, and swine, with which it has been erroneously contrasted by ignorant or scheming "naturalists," who have at great length declared it to be similar, when in fact it is utterly and irreconcilably different. III. That two weeks of the year (between July 4-25) in which all of the cows land, give birth to their young (a single pup), and are impregnated for another 12 months of gestation, is now admitted to be the "height of the season" by every observer who has had several seasons of personal study of the question on the rookeries. 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.
Download or read book NOAA Technical Report NMFS written by and published by . This book was released on 1984 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fur Seal Investigations Pribilof Islands written by Alton Y. Roppel and published by . This book was released on 1963 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
