期刊
MARINE MAMMAL SCIENCE
卷 30, 期 1, 页码 122-138出版社
WILEY
DOI: 10.1111/mms.12025
关键词
demography; lifetime survival; vital rates; elephant seal; Mirounga angustirostris; pinniped; life history
资金
- Office of Naval Research
- National Science Foundation
The aim of this study was to extend 40yr of prior demographic work on northern elephant seals (Mirounga angustirostris) at Ano 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, averaging 67.7%/yr from age 1 to age 15, the age of the oldest male. Northern elephant seal females in the expanding population at Ano Nuevo live longer than southern elephant seal females (M. leonina) at colonies whose populations are declining. This comparison suggests that high survival of females is a key factor in population growth.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据