On the relationship between ontogenetic and static allometry

Ontogenetic and static allometries describe how a character changes in size when the size of the organism changes during ontogeny and among individuals measured at the same developmental stage, respectively. Understanding the relationship between these two types of allometry is crucial to understanding the evolution of allometry and, more generally, the evolution of shape. However, the effects of ontogenetic allometry on static allometry remain largely unexplored. Here, we first show analytically how individual variation in ontogenetic allometry and body size affect static allometry. Using two longitudinal data sets on ontogenetic and static allometry, we then estimate variances and covariances for the different parameters of the ontogenetic allometry defined in our model and assess their relative contribution to the static allometric slope. The mean ontogenetic allometry is the main parameter that determines the static allometric slope, while the covariance between the ontogenetic allo...个体发育异速生长（ontogenetic allometry）与静态异速生长（static allometry）分别刻画了两类场景下的性状大小变化规律：前者对应个体发育过程中生物体自身大小改变时的性状尺寸变化，后者对应同一发育阶段不同个体间的性状尺寸变化。明晰这两类异速生长之间的关联，对于理解异速生长的演化，乃至更广泛意义上的形态演化均至关重要。然而，个体发育异速生长对静态异速生长的影响迄今仍未得到充分探究。本研究首先通过解析分析，阐明个体发育异速生长与个体体型的个体间差异如何影响静态异速生长。随后，本研究利用两套包含个体发育与静态异速生长信息的纵向数据集，对模型中定义的个体发育异速生长各参数的方差与协方差进行估计，并评估其对静态异速生长斜率的相对贡献度。其中，平均个体发育异速生长是决定静态异速生长斜率的核心参数，而个体发育异速生长参数间的协方差……