Age-specific survival, breeding success, and recruitment in common murres (Uria aalge) of the California current system

Derek E. Lee, Christine L. Abraham, Peter M. Warzybok, Russell W. Bradley, William J. Sydeman

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Estimating age-specific vital rates and determining which of them have the greatest influence on population trajectory is very useful for conservation and management of at-risk species. We created multistate capture-recapture models to provide estimates of age-specific variation in survival, recruitment, breeding propensity, and breeding success of Common Murres (Uria aalge) breeding at Southeast Farallon Island, California. Model-averaged age functions indicated that a "plateauing" (inverse age) function best characterized recruitment probability (transition from nonbreeder to breeder state) and breeding success (fledglings per pair). Adult and juvenile survival and breeding propensity were best modeled as constant with age. We modeled the population using an extended Leslie matrix and determined elasticity values for each of our estimated parameters to determine which have the greatest influence on population growth. Elasticities indicated that variation in adult survival had the greatest influence on population growth rate, but juvenile survival was also important. Increased juvenile survival since 1999, a period of cooler and more productive oceanic conditions, is probably largely responsible for the population growth observed during this period.

Original languageEnglish (US)
Pages (from-to)316-325
Number of pages10
JournalAuk
Volume125
Issue number2
DOIs
StatePublished - Jan 1 2008

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reproductive success
breeding
population growth
elasticity (mechanics)
elasticity
coolers
trajectories
trajectory
Uria aalge
matrix

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

Lee, Derek E. ; Abraham, Christine L. ; Warzybok, Peter M. ; Bradley, Russell W. ; Sydeman, William J. / Age-specific survival, breeding success, and recruitment in common murres (Uria aalge) of the California current system. In: Auk. 2008 ; Vol. 125, No. 2. pp. 316-325.
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Age-specific survival, breeding success, and recruitment in common murres (Uria aalge) of the California current system. / Lee, Derek E.; Abraham, Christine L.; Warzybok, Peter M.; Bradley, Russell W.; Sydeman, William J.

In: Auk, Vol. 125, No. 2, 01.01.2008, p. 316-325.

Research output: Contribution to journalArticle

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