A Population Study of the Alaska Fur-seal Herd PDF Download
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Author: Karl W. Kenyon
Publisher:
ISBN:
Category : Northern fur seal
Languages : en
Pages : 88
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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: Karl W. Kenyon
Publisher:
ISBN:
Category : Northern fur seal
Languages : en
Pages : 88
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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: Hiroshi Kajimura
Publisher:
ISBN:
Category : Northern fur seal
Languages : en
Pages : 304
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 678
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Book Description
Author: John P. Croxall
Publisher:
ISBN:
Category : Northern fur seal
Languages : en
Pages : 224
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Book Description
14 species summaries, 12 contributed papers and 5 rapporteurs' reports on fur seals throughout the world including the Pribilof Islands and Antarctica.
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 892
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Book Description
Author: U.S. Fish and Wildlife Service
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 574
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 350
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Book Description
Author: Richard D. Brodeur
Publisher:
ISBN:
Category : Nekton
Languages : en
Pages : 590
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Book Description
Author: Ken Ross
Publisher: University Press of Colorado
ISBN: 1607327147
Category : History
Languages : en
Pages : 569
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Book Description
A companion volume to Environmental Conflict in Alaska, Pioneering Conservation in Alaska chronicles the central land and wildlife issues and the growth of environmental conservation in Alaska during its Russian and territorial eras. The Alaskan frontier tempted fur traders, whalers, salmon fishers, gold miners, hunters, and oilmen to take what they could without regard for long-term consequences. Wildlife species, ecosystems, and Native cultures suffered, sometimes irreparably. Damage to wildlife and lands drew the attention of environmentalists, including John Muir, who applied their influence to enact wildlife protection laws and set aside lands for conservation. Alaska served as a testing ground for emergent national resource policy in the United States, as environmental values of species and ecosystem sustainability replaced the unrestrained exploitation of Alaska's early frontier days. Efforts of conservation leaders and the territory's isolation, small human population, and late development prevented widespread destruction and gave Americans a unique opportunity to protect some of the world's most pristine wilderness. Enhanced by more than 100 photographs, Pioneering Conservation in Alaska illustrates the historical precedents for current natural resource disputes in Alaska and will fascinate readers interested in wildlife and conservation.
Author: Briton Cooper Busch
Publisher: McGill-Queen's Press - MQUP
ISBN: 9780773506107
Category : Business & Economics
Languages : en
Pages : 436
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Book Description
Concentrates on the fur seals of the Bering Sea and the harp seals of the Newfoundland hunt. Reveals the consequences of an industry's killing of more than 50,000,000 seals in a century and a half.
