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: 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 : 678
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 892
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Book Description
Author: Hiroshi Kajimura
Publisher:
ISBN:
Category : Northern fur seal
Languages : en
Pages : 304
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Book Description
Author:
Publisher:
ISBN:
Category : Animals
Languages : en
Pages : 284
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Book Description
Author: Food and Agriculture Organization of the United Nations. Working Party on Marine Mammals
Publisher: Food & Agriculture Org.
ISBN: 9789251005149
Category : Nature
Languages : en
Pages : 556
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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:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 350
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Book Description
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.
