Senescence and age-specific trade-offs between reproduction and survival in female Asian elephants.
Senescence and age-specific trade-offs between reproduction and survival in female Asian elephants.
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DOI：
10.1111/j.1461-0248.2011.01735.x
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发表时间：
2012-03
期刊：
影响因子：
8.8
通讯作者：
M. Robinson;K. U. Mar;V. Lummaa
中科院分区：
文献类型：
--
作者：
M. Robinson;K. U. Mar;V. Lummaa
尽管对实验室物种和脊椎动物自然种群的研究表明，繁殖会损害后期的表现，但对繁殖和生存之间的年龄特异性联系以及这些发现如何适用于大型长寿物种的衰老却知之甚少。在这里，我们开发了一个框架，以检查人口水平的模式，在长寿的生物体的整个生命周期的繁殖和生存，并将这些变化分解为个人层面的影响，以及特定年龄的健身组件之间的权衡的影响。我们将此应用于一个广泛的纵向数据集的女性半圈养亚洲木材大象（Elephas maximus），并报告了第一个证据的年龄特定的健身下降，驱动的年龄特定的健身组件之间的关联，在长寿的哺乳动物。繁殖和生存之间的关联在早期生活中是积极的，但在晚年生活中是消极的，高达71%的晚年生存下降与这种极度濒危物种的后代生产投资有关。
Although studies on laboratory species and natural populations of vertebrates have shown reproduction to impair later performance, little is known of the age-specific associations between reproduction and survival, and how such findings apply to the ageing of large, long-lived species. Herein we develop a framework to examine population-level patterns of reproduction and survival across lifespan in long-lived organisms, and decompose those changes into individual-level effects, and the effects of age-specific trade-offs between fitness components. We apply this to an extensive longitudinal dataset on female semi-captive Asian timber elephants (Elephas maximus) and report the first evidence of age-specific fitness declines that are driven by age-specific associations between fitness components in a long-lived mammal. Associations between reproduction and survival are positive in early life, but negative in later life with up to 71% of later-life survival declines associated with investing in the production of offspring within this population of this critically endangered species.