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

Published: 2003-05-04

Total Pages: 217

ISBN-13: 0309086329

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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

Published: 2003-04-04

Total Pages: 216

ISBN-13: 0309168724

DOWNLOAD EBOOK →

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.

Steller Sea Lion Decline

Steller Sea Lion Decline PDF

Author: Douglas P. DeMaster

Publisher:

Published: 2002

Total Pages: 86

ISBN-13:

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The most likely cause of the moderate decline of western Alaska Steller sea lions, in the 1990s, is poor recruitment (reproduction and survival of young). Also implicated are nutritional stress, predation, and disease. In contrast, nutritional stress alone was the leading hypothesis for a steep decline in sea lions the 1980s. This book has 13 extended abstracts presented at a May 2001 workshop. Attendees included the nation's leading authorities on Alaska's Steller sea lions.

Ocean and Coastal Resources Law

Ocean and Coastal Resources Law PDF

Author: Josh Eagle

Publisher: Aspen Publishing

Published: 2023-08-28

Total Pages: 832

ISBN-13:

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Ocean and Coastal Resources Law is a topical and up-to-date resource for those interested in marine law and policy and the land uses near marine areas, and how they interact. Ocean and Coastal Resources Law, 4e, provides an interdisciplinary approach that combines cases and materials with key sources from science, economics, and business. Ocean and Coastal Resources Law prepares students for practice as lawyers in a variety of fields, such as conservation and marine protection, oil and gas and renewable energy development, coastal land use, real estate, development, and work in nongovernmental organizations and federal and state regulatory agencies. The Fourth Edition adds updated materials related to the rapidly developing law of climate adaptation, e.g., fisheries regulation as fish populations relocate, and the regulation of coastal structure protection as sea levels rise. New to the Fourth Edition: Coverage of domestic and international ocean law, protected marine species, and off-shore industrial development Updated materials on renewable energy and aquaculture In-depth treatment of the Deepwater Horizon disaster. A holistic view of how activities on the seas affect coastal land activities, and vice versa Updates throughout Coastal Law chapters through 2023 New points for discussion Refreshed problem exercises Professors and students will benefit from: Coverage of domestic and international ocean law--richly illustrated and accessibly written The back-to-back organization of Ocean Law and Coastal Law chapters may be easily adapted to syllabi on Ocean Law, Coastal Law, or Ocean and Coastal Law courses Interdisciplinary materials from law, science, economics, and business inform and add perspective to a range of subjects--such as conservation, land use, and industry regulation--preparing students for careers as lawyers in a variety of fields Points for discussion highlight connections between cases and topics and raise questions that encourage students to articulate a response to issues of law and policy

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