Control of parental investment changes plastically over time with residual reproductive value
Control of parental investment changes plastically over time with residual reproductive value
复制标题
随着时间的推移，父母投资的控制会随着剩余繁殖价值而发生塑性变化
DOI：
10.1111/jeb.12775
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发表时间：
2016
影响因子：
2.1
通讯作者：
S. Koyama
中科院分区：
文献类型：
--
作者：
M. Takata;H. Doi;C. Thomas;S. Koyama
亲本资源投入的进化冲突对亲本和后代的性状都有重要的选择作用。实证研究表明，某些物种的亲代投资由亲代控制，而另一些物种的亲代投资则由后代控制。这两种策略的主要区别在于父母的剩余繁殖价值或未来繁殖的机会。因此，这可以解释物种水平上亲本投资的控制模式。然而，父母的剩余生殖价值在其一生中会发生变化；因此，父母对投资金额的影响可以预期会发生塑性变化。本研究采用交叉培养的方法，研究了四爪小蠹蛾幼小的、剩余生殖价值高的亲本投资与年老的、剩余生殖价值低的亲本投资的控制关系。我们发现父母在他们年轻时对亲代投资施加了更大的控制，但随着父母年龄的增长，父母的控制减弱了。我们的研究结果表明，亲代投资的控制不是固定的，而是在亲代一生中发生可塑性变化的。
Evolutionary conflict between parents and offspring over parental resource investment is a significant selective force on the traits of both parents and offspring. Empirical studies have shown that for some species, the amount of parental investment is controlled by the parents, whereas in other species, it is controlled by the offspring. The main difference between these two strategies is the residual reproductive value of the parents or opportunities for future reproduction. Therefore, this could explain the patterns of control of parental investment at the species level. However, the residual reproductive value of the parents will change during their lifetime; therefore, parental influence on the amount of investment can be expected to change plastically. Here, we investigated control of parental investment when parents were young and had a high residual reproductive value, compared to when they were old and had a low residual reproductive value using a cross‐fostering experiment in the burying beetle Nicrophorus quadripunctatus. We found that parents exert greater control over parental investment when they are young, but parental control is weakened as the parents age. Our results demonstrate that control of parental investment is not fixed, but changes plastically during the parent's lifetime.