Survival rates for Cassin's and Rhinoceros Auklets at Triangle Island, British Columbia.

Title:	Survival rates for Cassin's and Rhinoceros Auklets at Triangle Island, British Columbia.
Author:	Bertram, D.F.; Jones, I.L.; Cooch, E.G.; Knechtel, H.A.; Cooke, F.
Abstract:	We estimated survival of Cassin's Auklet (Ptychoramphus aleuticus) and Rhinoceros Auklet (Cerorhincam onocerata)f rom recapturer ates during 1994-1997. For both species, a two "age"-class model provided the best fit. Estimates of local adult survival were significantly lower for Cassin's Auklet (0.672 +/- 0.047) than for Rhinoceros Auklet (0.829 +/- 0.095). Our estimate of survival appears lower than that required for the maintenance of a stable populationo f Cassin'sA uklets.T he availablei nformationi ndicatest hat a low survival rate and a declining population at Triangle Island are plausible, particularly given the recentl arge scale oceanographicc hangesw hich have occurredi n the NorthP acific Ocean. Nevertheless, additionalm ark-recapturde ata and indexes of population size arerequiredt o rigorouslyd emonstratep opulationd eclines at the world'sl argestC assin'sA uklet colony.
Subject:	Alcidae Cassin's Auklet Cerorhinca monocerata demography Ptychoramphus aleuticus Rhinoceros Auklet seabird conservation and management
Type:	Article
Rights:	Publisher's statement to accompany pre-print and post-print ------ "Published as "Bertram, D.F.,Jones, I.L.,Cooch, E.G., Knechtel, H.A. and Cooke, F. Survival rates for Cassin's and Rhinoceros Auklets at Triangle Island, British Columbia. The Condor 102(1):155-162. (2000)'" © 2011 by the Regents of the University of California. Copying and permissions notice: Authorization to copy this content beyond fair use (as specified in Sections 107 and 108 of the U. S. Copyright Law) for internal or personal use, or the internal or personal use of specific clients, is granted by the Regents of the University of California for libraries and other users, provided that they are registered with and pay the specified fee via Rightslink® on JSTOR (http://www.jstor.org/r/ucal) or directly with the Copyright Clearance Center, http://www.copyright.com" http://www.jstor.org/stable/1370392 http://ucpressjournals.com/journal.php?j=cond http://ucpressjournals.com
URI:	http://hdl.handle.net/10315/13795
Published:	University of California Press
Citation:	The Condor 102(1):155-162. (2000)
Date:	2000-02