Actuarial and reproductive senescence in a long-lived seabird: preliminary evidence

被引：23
|
作者：
Anderson, DJ [1 ]
Apanius, V
机构：
[1] Wake Forest Univ, Dept Biol, Winston Salem, NC 27109 USA
[2] Florida Int Univ, Dept Biol Sci, Miami, FL 33199 USA
来源：
EXPERIMENTAL GERONTOLOGY | 2003年 / 38卷 / 07期
关键词：
reproduction; actuarial senescence; seabird; nazea booby; Sula granti;
D O I：
10.1016/S0531-5565(03)00104-9
中图分类号：
R592 [老年病学]; C [社会科学总论];
学科分类号：
03 ; 0303 ; 100203 ;
摘要：
The evolutionary theory of aging predicts that pelagic seabirds, which have low extrinsic mortality, should show exceptional longevity. These taxa appear to show the lowest rates of actuarial senescence among birds yet display declining reproductive performance at advanced ages. We have studied survival and reproduction of Nazca boobies (Sula granti) in the remote Galapagos Islands since 1984. We found a slight but detectable increase in mortality rate in the oldest (greater than or equal to 19 yrs) cohort, indicating minimal actuarial senescence. The probability of successful reproduction (eggs or fledglings) declined from mid-life to the age of the oldest cohort. We are currently investigating the causal relationship between physical (foraging) performance, components of reproductive success, and longevity at our pristine study site. (C) 2003 Elsevier Science Inc. All rights reserved.
引用
收藏
页码：757 / 760
页数：4
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