Extracting the Underlying Physiological Determinants of Resource-Based Trade-Offs: A Principal Components Approach
Extracting the Underlying Physiological Determinants of Resource-Based Trade-Offs: A Principal Components Approach
复制标题
提取基于资源的权衡的潜在生理决定因素：主成分方法
DOI：
10.1086/667194
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
D. Roff
中科院分区：
文献类型：
--
作者：
Elizabeth G. King;D. Fairbairn;D. Roff
争夺资源的特征之间的关系受到资源获取和分配差异的影响。准确测量这些潜在的生理过程的困难阻碍了基于资源的权衡研究。在这里，我们通过将这些轴与使用生理测量获得的估计进行比较，探索主成分分析（PCA）提取与二变量权衡中的获取和分配相对应的轴的能力。我们通过模拟验证了该方法，然后使用经验数据对其进行测试，以了解雌性沙蟋蟀 (Gryllus Firmus) 飞行能力和繁殖能力之间的权衡。我们发现我们的生理估计值与使用 PCA 获得的估计值之间高度一致。我们的结果表明，PCA 提供了一种稳健且有效的方法，可以直接根据基于资源的权衡所涉及的特征来估计获取和分配。
The relationship between traits that compete for resources is influenced by variance in the acquisition and allocation of resources. The difficulty of accurately measuring these underlying physiological processes has hampered studies of resource-based trade-offs. Here, we explore the ability of principal components analysis (PCA) to extract axes corresponding to acquisition and allocation in a bivariate trade-off by comparing these axes to estimates obtained using physiological measurements. We validate the method using simulations and then test it using empirical data for the well-characterized trade-off between flight capability and reproduction in female sand crickets, Gryllus firmus. We find a high correspondence between our physiological estimates and the estimates obtained using PCA. Our results demonstrate that PCA provides a robust and efficient method for estimating acquisition and allocation directly from the traits involved in a resource-based trade-off.