Few genetic studies that provide biological, ecological and evolutionary information have been conducted for parrotfishes, including Sparisoma viride, and none has covered the full geographic range of this species. Here, we examine the genetic patterns of the Stoplight parrotfish (S. viride) in the Greater Caribbean and its relationship with the recognized biogeographic provinces in the region. Phylogeographic, population and coalescent analyses were performed to examine the genetic structure and connectivity of S. viride populations throughout its entire range within the Greater Caribbean. Two mitochondrial (control region and coxI) and one nuclear (RHO) markers were used. The Stoplight parrotfish shows high haplotypic diversity (h) and low nucleotide diversity (π) in the control region, and low genetic diversity in coxI and RHO. No evidence of genetic structure was found, indicating a panmictic population throughout the Greater Caribbean with highly symmetrical migration rates among previously defined Caribbean biogeographic provinces. The demographic history estimates indicate events of bottlenecks followed by a population expansion dated at 80,000 years ago (kya) during the Pleistocene epoch. These results suggest that the contrasting environmental conditions that define the Greater Caribbean provinces are not barriers to gene flow for S. viride. The phylogeographic patterns of Stoplight parrotfish could be associated with the biological characteristics of the species (such as extensive pelagic larval duration and use of multiple habitats), historical demographic events and physical conditions of the Greater Caribbean, promoting the genetic homogeneity of the species in the region.

很少有针对鹦鹉鱼的遗传学研究提供生物学，生态和进化方面的信息，其中包括viris sparideoma，而且都没有涵盖该物种的全部地理范围。在这里，我们研究了大加勒比地区的交通信号灯鹦嘴鱼（S. viride）的遗传模式及其与该地区公认的生物地理省份的关系。进行了系统地理学，种群和聚结分析，以检查大加勒比地区整个范围内的链球菌种群的遗传结构和连通性。两个线粒体（控制区和coxI）和一个核仁（RHO））标记。红绿灯鹦嘴鱼在控制区显示高单倍型多样性（h）和低核苷酸多样性（π），在coxI和RHO中遗传多样性低。没有发现遗传结构的证据，表明整个大加勒比地区有大量的恐慌人口，在先前确定的加勒比生物地理省份之间迁移率高度对称。人口历史记录估计表明，在更新世时期出现瓶颈事件，然后是人口膨胀，发生在80,000年前。这些结果表明，定义大加勒比海省份的相反环境条件并非沙门氏菌基因流动的障碍。。交通信号灯鹦嘴鱼的系统地理学模式可能与该物种的生物学特征（例如广泛的中上层幼体持续时间和多种生境的使用），大加勒比地区的历史人口事件和自然状况有关，从而促进了该物种在遗传上的同质性。地区。