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Whales, Whaling, and Ocean Ecosystems$
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James Estes

Print publication date: 2007

Print ISBN-13: 9780520248847

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520248847.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 26 June 2022

Potential Influences of Whaling on the Status and Trends of Pinniped Populations

Potential Influences of Whaling on the Status and Trends of Pinniped Populations

(p.344) Twenty-Seven Potential Influences of Whaling on the Status and Trends of Pinniped Populations
Whales, Whaling, and Ocean Ecosystems




University of California Press

This chapter reviews the current trends of pinniped populations worldwide and summarizes the known or suspected reasons for recent declines. It evaluates trends in pinniped populations attributed to natural biological processes in terms of reproductive strategies, physiological limitations, and the resultant susceptibility to disturbance in prey resources and predation brought about by these factors. Increasing populations include most of the southern hemisphere fur seals, the California sea lion, harbor seal populations off the west coast of the United States, and the northern elephant seal. Populations in decline include northern and southern sea lions, the northern fur seal, the southern elephant seal in parts of the Southern Ocean, and the harbor seal in southwest Alaska. The tropical monk seals are either stable at low levels or in decline. Population trends for polar species are poorly known, although by and large these species appear to be both abundant and fairly stable.

Keywords:   pinniped populations, reproductive strategies, prey resources, predation, California sea lion, fur seals

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