Kerniske Franciele Fernanda, Pena Castro Jonathan, De la Ossa-Guerra Luz Elena, Mayer Bruna Angelina, Abilhoa Vinícius, de Paiva Affonso Igor, Ferreira Artoni Roberto
Graduate Program in Evolutionary Biology, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.
Graduate Program in Evolutionary Genetics and Molecular Biology, Federal University of São Carlos, São Carlos, São Paulo, Brazil.
PeerJ. 2021 Oct 20;9:e12239. doi: 10.7717/peerj.12239. eCollection 2021.
Fish populations that reside in completely isolated freshwater ecosystems are rare worldwide. The Vila Velha State Park (VVSP), located in southern Brazil, is recognized for its arenitic formations called sinkholes (), which are completely isolated. Fish populations within, such as those of aff. , often develop vertebral malformations due to this isolation from other conspecifics and other species. In this study, we analyzed geometric morphology in digital radiographs to identify congenital deformations of aff. in of VVSP. We found many fish with spinal deformities, including wide variation in the number of caudal vertebrae and corporal deformations related to a flattened body and spinal curvature. Females were more affected than males. We also demonstrated that these deformations reflect inbreeding and an absence of gene flow in the population. In conclusion, isolated populations such as fish species in are potential models for evo-devo research.
生活在完全孤立的淡水生态系统中的鱼类种群在世界范围内都很罕见。位于巴西南部的维拉韦利亚州立公园（VVSP）以其被称为灰岩坑的砂质地层而闻名，这些地层是完全孤立的。其中的鱼类种群，比如拟 的鱼类种群，由于与其他同种和其他物种隔离，常常会出现脊椎畸形。在本研究中，我们分析了数字X光片中的几何形态，以识别维拉韦利亚州立公园 中拟 的先天性畸形。我们发现许多鱼有脊柱畸形，包括尾椎数量的广泛差异以及与身体扁平、脊柱弯曲相关的身体变形。雌性比雄性受影响更严重。我们还证明，这些畸形反映了种群中的近亲繁殖和基因流动的缺乏。总之，像 中的鱼类物种这样的孤立种群是进化发育研究的潜在模型。
