Decline of the Steller Sea Lion in Alaskan Waters

Decline of the Steller Sea Lion in Alaskan Waters PDF Author: National Research Council
Publisher: National Academies Press
ISBN: 0309086329
Category : Science
Languages : en
Pages : 217

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Book Description
For an unknown reason, the Steller sea lion population in Alaska has declined by 80% over the past three decades. In 2001, the National Research Council began a study to assess the many hypotheses proposed to explain the sea lion decline including insufficient food due to fishing or the late 1970s climate/regime shift, a disease epidemic, pollution, illegal shooting, subsistence harvest, and predation by killer whales or sharks. The report's analysis indicates that the population decline cannot be explained only by a decreased availability of food; hence other factors, such as predation and illegal shooting, deserve further study. The report recommends a management strategy that could help determine the impact of fisheries on sea lion survival-establishing open and closed fishing areas around sea lion rookeries. This strategy would allow researchers to study sea lions in relatively controlled, contrasting environments. Experimental area closures will help fill some short-term data gaps, but long-term monitoring will be required to understand why sea lions are at a fraction of their former abundance.

Decline of the Steller Sea Lion in Alaskan Waters

Decline of the Steller Sea Lion in Alaskan Waters PDF Author: National Research Council
Publisher: National Academies Press
ISBN: 0309086329
Category : Science
Languages : en
Pages : 217

Get Book Here

Book Description
For an unknown reason, the Steller sea lion population in Alaska has declined by 80% over the past three decades. In 2001, the National Research Council began a study to assess the many hypotheses proposed to explain the sea lion decline including insufficient food due to fishing or the late 1970s climate/regime shift, a disease epidemic, pollution, illegal shooting, subsistence harvest, and predation by killer whales or sharks. The report's analysis indicates that the population decline cannot be explained only by a decreased availability of food; hence other factors, such as predation and illegal shooting, deserve further study. The report recommends a management strategy that could help determine the impact of fisheries on sea lion survival-establishing open and closed fishing areas around sea lion rookeries. This strategy would allow researchers to study sea lions in relatively controlled, contrasting environments. Experimental area closures will help fill some short-term data gaps, but long-term monitoring will be required to understand why sea lions are at a fraction of their former abundance.

Decline of the Steller Sea Lion in Alaskan Waters

Decline of the Steller Sea Lion in Alaskan Waters PDF Author: National Research Council
Publisher: National Academies Press
ISBN: 0309168724
Category : Science
Languages : en
Pages : 216

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Book Description
For an unknown reason, the Steller sea lion population in Alaska has declined by 80% over the past three decades. In 2001, the National Research Council began a study to assess the many hypotheses proposed to explain the sea lion decline including insufficient food due to fishing or the late 1970s climate/regime shift, a disease epidemic, pollution, illegal shooting, subsistence harvest, and predation by killer whales or sharks. The report's analysis indicates that the population decline cannot be explained only by a decreased availability of food; hence other factors, such as predation and illegal shooting, deserve further study. The report recommends a management strategy that could help determine the impact of fisheries on sea lion survival-establishing open and closed fishing areas around sea lion rookeries. This strategy would allow researchers to study sea lions in relatively controlled, contrasting environments. Experimental area closures will help fill some short-term data gaps, but long-term monitoring will be required to understand why sea lions are at a fraction of their former abundance.

Final recovery plan for the steller sea lion (Eumetopias jubatus)

Final recovery plan for the steller sea lion (Eumetopias jubatus) PDF Author:
Publisher:
ISBN:
Category : Steller's sea lion
Languages : en
Pages : 112

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Book Description


The Findings and Recommendations of the Department of Defense Independent Review Relating to Fort Hood

The Findings and Recommendations of the Department of Defense Independent Review Relating to Fort Hood PDF Author: United States. Congress. Senate. Committee on Armed Services
Publisher:
ISBN:
Category : Biography & Autobiography
Languages : en
Pages : 268

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Book Description


Oversight Hearing on Steller Sea Lions

Oversight Hearing on Steller Sea Lions PDF Author: United States. Congress. House. Committee on Resources. Subcommittee on Fisheries Conservation, Wildlife, and Oceans
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 132

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Implementation of the Magnuson-Stevens Fishery Conservation and Management Act

Implementation of the Magnuson-Stevens Fishery Conservation and Management Act PDF Author: United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Oceans, Atmosphere, Fisheries, and Coast Guard
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 140

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Book Description


Southeast Alaska Harbors, Sitka

Southeast Alaska Harbors, Sitka PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 294

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Book Description


Astro

Astro PDF Author: Jeanne Walker Harvey
Publisher: Arbordale Publishing
ISBN: 1607180766
Category : Juvenile Nonfiction
Languages : en
Pages : 19

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Book Description
After Astro, an orphaned Steller sea lion, was rescued by scientists at The Marine Mammal Center in Sausalito, California, his attachment to people made him unable to be returned to the ocean and he now lives at the Mystic Aquarium in Connecticut.

Steller's Island

Steller's Island PDF Author: Dean Littlepage
Publisher: The Mountaineers Books
ISBN: 9781594850578
Category : Biography & Autobiography
Languages : en
Pages : 378

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Book Description
History, adventure, and science-the 18th century naturalist, Georg Steller, sailed to the north coast of North America and introduced its biological wonders to the world.

Arctic Research of the United States

Arctic Research of the United States PDF Author:
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 604

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Book Description