Lifetime survival rates and senescence in northern elephant seals

  title={Lifetime survival rates and senescence in northern elephant seals},
  author={Richard S. Condit and Joanne Reiter and Patrick A. Morris and Ryan W. Berger and Sarah G. Allen and Burney J. Le Boeuf},
  journal={Marine Mammal Science},
The aim of this study was to extend 40 yr of prior demographic work on northern elephant seals (Mirounga angustirostris )a t A~ Nuevo, California, by including the oldest animals. We used a Bayesian mark-recapture analysis to estimate lifelong survival and lifespan of a cohort of 372 weaned pups branded in 1985–1987 and resighted until 2008. Annual survival probability of females averaged 86.3%/yr at ages 5– 16, then declined until age 21, the age of the oldest female. Male survival was lower… 

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