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 ...
Read More
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.
Read Less
Add this copy of Decline of the Steller Sea Lion in Alaskan Waters: to cart. $14.16, good condition, Sold by Wonder Book - Member ABAA/ILAB rated 5.0 out of 5 stars, ships from Frederick, MD, UNITED STATES, published 2003 by National Academies Press.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
Good. Good condition. A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains. Bundled media such as CDs, DVDs, floppy disks or access codes may not be included.
Add this copy of Decline of the Steller Sea Lion in Alaskan Waters: to cart. $16.95, good condition, Sold by Earthlight Books rated 4.0 out of 5 stars, ships from Walla Walla, WA, UNITED STATES, published 2003 by National Academies Press.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
Good. Size: 6x0x8; Clean text, tight binding, light wear to exterior, academic library markings. A percentage of the proceeds from the sale of this book benefit Penrose Memorial Library at Whitman College in Walla Walla, Washington, Earthlight Books across the street, and the local Walla Walla economy!
Add this copy of Decline of the Steller Sea Lion in Alaskan Waters: to cart. $36.57, good condition, Sold by Alibris rated 5.0 out of 5 stars, ships from NV, USA, published 2003 by National Academies Press.
