Birds Do It, Bees Do It, We Do It: Contributions of Theoretical Modelling to Understanding the Shape of Ageing across the Tree of Life
Birds Do It, Bees Do It, We Do It: Contributions of Theoretical Modelling to Understanding the Shape of Ageing across the Tree of Life
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DOI：
10.1159/000341861
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发表时间：
2012-01-01
期刊：
影响因子：
3.5
通讯作者：
Baudisch, Annette
中科院分区：
文献类型：
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作者：
Baudisch, Annette
不同物种的生物体年龄不同。目前的理论解释了为什么生活会变得更糟，即为什么死亡风险增加的模式会演变。然而，对某些物种来说，死亡的风险保持不变，甚至随着年龄的增长而下降福尔斯。进化理论来解释观察到的衰老形态的多样性是缺乏的。理论模型可以提供对这种多样性的见解。比较模型的假设，发现死亡率增加的模式与模型，发现各种模式，包括恒定和下降的死亡率随年龄的增长，我确定的条件，许可证不变或负形状的老龄化。结果表明，随着年龄的增长，改善和维护的模式出现时，模型可能允许生物体（1）逃避“损害棘轮”，（2）并行实现维护和修复，（3）面对不断增加的未来生殖潜力，（4）纳入灵活的权衡。有了这些见解，理论模型有助于假设哪些物种可能遵循可忽略或负老化的生活史策略。版权所有（C）2012 S. Karger AG，巴塞尔
Organisms of different species age differently. Current theory explains why life should get worse, i.e. why patterns of increasing risk of death should evolve. However, for some species the risk of death remains constant or even falls with advancing age. Evolutionary theory to explain the observed diversity of shapes of ageing is lacking. Theoretical models can provide insights into this diversity. Comparing assumptions of models that find increasing mortality patterns with models that find a variety of patterns, including constant and falling mortality over age, I identify conditions that licence constant or negative shapes of ageing. The results suggest that patterns of improvement and maintenance over age emerge when models potentially allow organisms to (1) escape the 'damage ratchet', (2) achieve maintenance and repair in parallel, (3) face increasing future reproductive potential and (4) incorporate flexible trade-offs. With these insights, theoretical models contribute to hypotheses about which species may follow life history strategies of negligible or negative ageing. Copyright (C) 2012 S. Karger AG, Basel