Can the Fisher-Lande process account for birds of paradise and other sexual radiations?

Models of the Fisher‐Lande process (FLP) have been used successfully to explore many aspects of evolution by sexual selection. Despite this success, quantitative tests of these models using data from sexual radiations are rare. Consequently, we do not know whether realistic versions of the FLP can account for the extent and the rate of evolution of sexually selected traits. To answer this question, we generalize the basic FLP model of sexual coevolution and compare predictions of that basic model with patterns observed in an iconic sexual radiation, birds of paradise. Our model tracks the coevolution of male and female traits (two in each sex) while relaxing some restrictive assumptions. Using computer simulations, we evaluate the behavior of the model and confirm that it is an Ornstein‐Uhlenbeck (OU) process. We also assess the ability of the FLP to account for the quantitative aspects of ornament evolution in the genus Paradisaea using published measurements of display traits and a ph...费希尔-兰德过程（Fisher–Lande Process, FLP）模型已被成功用于探索性选择驱动演化的诸多方面。尽管此类模型已取得诸多成功，但利用性辐射相关数据对其开展定量检验的研究仍较为罕见。因此，我们尚不清楚符合现实场景的FLP模型能否解释性选择性状演化的幅度与速率。为解答这一问题，本研究对性协同演化的基础FLP模型进行了推广，并将该基础模型的预测结果与标志性性辐射类群——极乐鸟中观测到的演化模式进行了对比。我们的模型追踪雌雄两性各两个性状的协同演化过程，同时放宽了部分限制性假设。通过计算机模拟，我们评估了该模型的行为特征，并证实其属于奥恩斯坦-乌伦贝克过程（Ornstein–Uhlenbeck Process, OU）。此外，我们还利用已发表的展示性状测量数据及一份未完整呈现的数据集，评估了FLP模型能否解释极乐鸟属（Paradisaea）装饰物演化的定量特征。