Population
Population
Population Trend
The population fluctuates between 20,000 and 40,000 animals. A census in 1978 suggested a population size of about 40,000, but a recent survey in 2001 ? found a 50% decline from this earlier estimate (Alava and Salazar 2006). Methodological differences might exist between counts over this period, but the marked decline suggested is cause for serious concern.
Population Trend
Decreasing
Latest updates
Source information
© International Union for Conservation of Nature and Natural Resources
© International Union for Conservation of Nature and Natural Resources
View source
Supplier:
IUCN
Author: Aurioles, D. & Trillmich, F.
Compiler: Aurioles, D. & Trillmich, F. (IUCN SSC Pinniped Specialist Group)
Aurioles, D. & Trillmich, F. 2008. Zalophus wollebaeki. In: IUCN 2010 . IUCN Red List of Threatened Species. Version 2010.4 . <www.iucnredlist.org>. Downloaded on 22 August 2011 .
Revisions
- 2012-05-16 12:57:42 UTC
- 2011-08-25 06:41:21 UTC
- 2011-04-08 14:32:55 UTC
- 2011-02-09 20:37:00 UTC
- 2011-01-13 02:35:41 UTC
