Laboratorio de Ecología Molecular y Conservación, Departamento de Conservación de la Biodiversidad, El Colegio de la Frontera Sur (ECOSUR), Chetumal, Quintana Roo, México.
Transformación Arte y Educación A.C., Delegación Miguel Hidalgo, Ciudad de México, México.
PLoS One. 2023 Jun 22;18(6):e0287425. doi: 10.1371/journal.pone.0287425. eCollection 2023.
The Setophaga petechia complex includes 43 subspecies distributed within the new world, of which some are migratory and others are resident, with only two resident subspecies in the Mexican Caribbean: Setophaga petechia bryanti a mangrove subspecies belonging to the erithachorides group resident on the mainland of the Yucatan Peninsula and Setophaga petechia rufivertex endemic to Cozumel Island and belonging to the petechia group. Recently, a new population of individuals presenting intermediate phenotypic traits and living in mangrove ecosystems was discovered and reported for Cozumel Island. In this study, we used a multi-character approach including genetic (five ISSR genetic markers), morphometric (eight traits), phenotypic (four characteristics of males), and acoustic dataset (11 parameters) to understand the process of differentiation and the status of these new island individuals in relation to the two well-established subspecies using a total of 60 individuals (20 for each group). Through multivariate analyses based on different dataset used in our study, we show how the new population is related to the endemic island subspecies, S. p. rufivertex and to the mainland subspecies, S. p. bryanti while demonstrating finite differences. We conclude that the new population of S. petechia on Cozumel Island is a well-established population with high level of differentiation.
斑胸草雀复合体包括分布在新世界的 43 个亚种，其中一些是迁徙的，另一些是留鸟，在墨西哥加勒比地区只有两个留鸟亚种：斑胸草雀 bryanti，一种属于 erithachorides 组的红树林亚种，在尤卡坦半岛大陆上栖息；斑胸草雀 rufivertex，是科苏梅尔岛的特有种，属于 petechia 组。最近，在科苏梅尔岛发现并报道了一个具有中间表型特征的新个体种群，生活在红树林生态系统中。在这项研究中，我们使用了一种多特征方法，包括遗传（五个 ISSR 遗传标记）、形态计量学（八个特征）、表型（雄性的四个特征）和声学数据集（11 个参数），以了解分化过程以及这些新岛屿个体与两个已确立亚种的关系，共使用了 60 个个体（每个组 20 个）。通过对我们研究中使用的不同数据集的多元分析，我们展示了新种群与科苏梅尔岛特有亚种 S. p. rufivertex 和大陆亚种 S. p. bryanti 的关系，同时也证明了它们之间存在有限的差异。我们的结论是，科苏梅尔岛上的斑胸草雀新种群是一个具有高度分化的成熟种群。
