Molecular Systematics Laboratory, Department of Biochemistry and Molecular Biology, University Santiago de Compostela, A Coruña, Galicia, Spain.
BIOMOL Laboratory, Department of Biology, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain.
PLoS One. 2020 Mar 19;15(3):e0230294. doi: 10.1371/journal.pone.0230294. eCollection 2020.
Exploited, understudied populations of the common octopus, Octopus vulgaris Cuvier, 1797, occur in the northeastern Atlantic (NEA) throughout Macaronesia, comprising the Azores, Madeira and Canaries, and also the Cabo Verde archipelago. This octopus species, found from the intertidal to shallow continental-shelf waters, is largely sedentary, and the subject of intense, frequently unregulated fishing effort. We infer connectivity among insular populations of this octopus. Mitochondrial control region and COX1 sequence datasets reveal two highly divergent haplogroups (α and β) at similar frequencies, with opposing clinal distributions along the sampled latitudinal range. Haplogroups have different demographic and phylogeographic patterns, with origins related to the two last glacial maxima. FST values suggest a significant differentiation for most pairwise comparisons, including insular and continental samples, from the Galicia and Morocco coasts, with the exception of pairwise comparisons for samples from Madeira and the Canaries populations. Results indicate the existence of genetically differentiated octopus populations throughout the NEA. This emphasizes the importance of regulations by autonomous regional governments of the Azores, Madeira and the Canaries, for appropriate management of insular octopus stocks.
被开发利用且研究不足的北大西洋普通章鱼（Octopus vulgaris Cuvier, 1797）种群分布于马卡罗尼西亚地区的东北大西洋，包括亚速尔群岛、马德拉群岛和加那利群岛，以及佛得角群岛。这种章鱼生活在潮间带至浅大陆架水域，其大部分时间是静止的，并且是密集、频繁无监管捕捞活动的对象。我们推断了这些章鱼岛屿种群之间的连通性。线粒体控制区和 COX1 序列数据集显示，存在两种高度分化的单倍群（α和β），频率相似，沿采样的纬度范围呈相反的渐变分布。单倍群具有不同的种群动态和地理分布模式，起源与最近的两次冰河时代最大值有关。FST 值表明，大多数成对比较存在显著的分化，包括来自加利西亚和摩洛哥海岸的岛屿和大陆样本，但马德拉群岛和加那利群岛种群的样本之间的成对比较除外。结果表明，东北大西洋存在遗传分化的章鱼种群。这强调了亚速尔群岛、马德拉群岛和加那利群岛的自治地区政府进行监管的重要性，以对岛屿章鱼种群进行适当的管理。
