Cytochrome c oxidase subunit I variability in <i>Ruditapes decussatus</i> (Veneridae) from the western Mediterranean

<i>Ruditapes decussatus</i> (Linnaeus, 1758) (Veneridae) is an Atlanto-Mediterranean bivalve whose populations have experienced reductions and, in some instances, hybridisation with allochthonous <i>R. philippinarum</i>. Acquisition of additional genetic knowledge concerning the present <i>R. decussatus</i> populations is essential to address adequate conservation plans for this species. For this purpose, we analysed a portion of the mtDNA cytochrome c oxidase subunit I (COI) region in populations from the western Mediterranean, where this species represents a harvested fishery resource. Our analyses revealed an overall lack of genetic structure within the western Mediterranean area, and the occurrence of mtDNA substructuring between the Aegean and Marmara seas and the remaining populations from the whole Mediterranean basin and the South European Atlantic coast. The results obtained for populations from Sardinia, where extensive restocking programmes have not been reported and where <i>R. philippinarum</i> is rare and localised, suggest that intensive harvesting and potential dispersal alone may have been able to shape the genetic variation identified in the local <i>R. decussatus</i> populations.

交叉帘蛤（Ruditapes decussatus，Linnaeus, 1758）隶属于帘蛤科（Veneridae），是一种大西洋-地中海分布的双壳类软体动物。该物种种群数量持续缩减，部分种群还与外来的菲律宾蛤仔（Ruditapes philippinarum）发生了杂交。获取当前交叉帘蛤种群的更多遗传学信息，是制定该物种合理保护计划的核心前提。为此，我们对西地中海海域的交叉帘蛤种群展开了研究——该海域中该物种为重要的捕捞渔业资源——并分析了其线粒体DNA（mtDNA）细胞色素c氧化酶亚基I（COI）的区域片段。分析结果显示，西地中海海域内部整体不存在遗传结构分化，但爱琴海、马尔马拉海种群与整个地中海盆地及南欧大西洋沿岸的其余种群之间，存在线粒体DNA亚结构分化。撒丁岛海域未开展过大规模人工增殖放流计划，且菲律宾蛤仔在此地分布稀少且局限，对该海域种群的分析结果表明，仅高强度捕捞活动与潜在的种群扩散过程，便足以塑造当地交叉帘蛤种群的遗传变异格局。

搜集汇总

背景与挑战

背景概述

该数据集聚焦于地中海西部Ruditapes decussatus（一种双壳类动物）种群的细胞色素c氧化酶亚基I（COI）遗传变异性分析，旨在支持物种保护计划。研究发现该区域种群缺乏遗传结构，但爱琴海和马尔马拉海种群与其他地中海种群存在mtDNA亚结构，并探讨了捕捞和扩散对遗传变异的影响。数据集包含相关研究文件，覆盖遗传学、生态学等领域，采用CC BY 4.0许可。