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 : 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: 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: John P. Croxall Publisher: ISBN: Category : Northern fur seal Languages : en Pages : 224
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: Briton Cooper Busch Publisher: McGill-Queen's Press - MQUP ISBN: 9780773506107 Category : Business & Economics Languages : en Pages : 436
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.
Author: Karl W. Kenyon
Author: Karl W. Kenyon
Author: Hiroshi Kajimura
Author: John P. Croxall
Author: Richard D. Brodeur
Author: 
Author: 
Author: United States. Bureau of the Census
Author: 
Author: Briton Cooper Busch
Author: U.S. Fish and Wildlife Service