Does the Kuroshio Current transport planktonic larvae of the hydrothermal-vent crab <i>Xenograpsus</i> Takeda & Kurata, 1977 (Decapoda: Brachyura: Grapsoidea)?
Does the Kuroshio Current transport planktonic larvae of the hydrothermal-vent crab <i>Xenograpsus</i> Takeda & Kurata, 1977 (Decapoda: Brachyura: Grapsoidea)?
复制标题
黑潮是否输送热液喷口蟹<i>Xenograpsus</i> Takeda的浮游幼虫
DOI：
10.1093/jcbiol/ruac016
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发表时间：
2022
影响因子：
1.1
通讯作者：
Miyake Hiroshi
中科院分区：
文献类型：
--
作者：
Oda Ayako;Watanabe Hiromi Kayama;Ohtsuka Susumu;Wada Shigeki;Kondo Yusuke;Miyake Hiroshi
栖息于浅水热液喷口的蟹类 Xenograpsus 在西太平洋的分布有限，因此为观察物种如何扩大其分布以及建立和维持集合种群提供了良好的机会。我们分析了沿黑潮分布的四个日本异爪鱼种群（Kueishan-dao、Showa Iwo-jima、Shikine-jima 和 Omuro-dashi），以评估种群连通性是否受到黑潮的影响。重建的系统发育树表明，分析的标本属于单个进化枝，包括X。龟山岛龟甲。我们无法包含 X 的遗传数据。 novaeinsularisand暂将分析的样本称为X。睾丸。所有四个群体都有两种主要的单倍型。尽管如此，相距约 1,000 公里的昭和硫磺岛和大室大师之间仍存在统计学上显着的人口差异。在式根岛 (N= 11) 和龟山岛 (N= 5) 分析的个体数量可能不足以检测差异。人口扩张的相对年龄似乎与黑潮逆流的方向相关。连同有关浮游幼虫、X 幼虫分布的知识。 testudinatus 保留并主要贡献于其源种群。黑潮系统偶尔会在漂浮的浮石和其他物质上运送幼虫和幼虫，甚至成年个体，最终定居在火山喷发后新形成的栖息地，从而扩大了该物种的分布范围。
The grapsoid crabXenograpsusinhabiting shallow-water hydrothermal vents shows a limited distribution in the western Pacific, thus providing a good opportunity to observe how a species expands its distribution and establishes and maintains a metapopulation. We analyzed four Japanese populations ofXenograpsus(Kueishan-dao, Showa Iwo-jima, Shikine-jima, and Omuro-dashi) distributed along the Kuroshio Current to assess whether population connectivity is affected by the current. The reconstructed phylogenetic tree indicated that the specimens analyzed belong to a single clade, includingX. testudinatusin Kueishan-dao. We could not include genetic data ofX. novaeinsularisand tentatively refer to the specimens analyzed asX. testudinatus. All four populations shared the two major haplotypes. Statistically significant population differentiation was nevertheless recognized between Showa Iwo-jima and Omuro-dashi, about 1,000 km apart. The number of individuals analyzed in Shikine-jima (N= 11) and Kueishan-dao (N= 5) might not be enough to detect differences. The relative age of population expansion seemed to correlate with the direction of the Kuroshio Countercurrent. Together with knowledge on the distribution of the planktonic larvae, larvae ofX. testudinatusstay and mostly contribute to its source population. The Kuroshio Current system occasionally transports the larvae and juveniles, or even adult individuals on floating pumice and other materials, to eventually settle into newly formed habitats after volcanic eruptions, thus expanding the distributional range of the species.