中文摘要：

Planktonic 桡脚类的动物 Calanus sinicus 是在西北太平洋的主导的中央浮游动物。更好理解它的人口动力学和 phylogeographic 模式， 243 C。sinicus 个人越过中国的架水从七个地点被收集，它的人口遗传被 mitochondrial DNA 细胞色素 oxidase 学习(mtCOI ) 我定序分析。39 个不同序列，或 haplotypes，为所有人口与中等 haplotype 差异(h=0.749 ) 和低核苷酸差异(=0.003 ) 被检测。在地理人口之间的进化分叉从 0.24% ～ 0.37% 变化了，很有限的基因区别的陈述语气。设想的最小跨越网络(MSN ) 和所有检测 haplotypes 的种系发生的分析没揭示任何清楚的 phylogeographic 模式。而且， AMOVA 数据证明没有重要空间人口区别在越过中国架水收集的个人之中存在。Pairwise F < 潜水艇 class= “ a-plus-plus ” > 圣 价值证明从华东海(ECS ) 的西北收集的人口显示了低差别到另外的人口。失配分发分析和中性测试显示了那 C。sinicus 可能经历 demographic/population 扩大。没有重要人口基因组织被检测，在 C 之中显示广泛的基因流动。sinicus 人口。我们的结果为假设提供分子的证据那 C。在在冬季的西北的华南海的 sinicus 被中国沿海的水流在东北季风时期期间从华东海和黄海搬运。

英文摘要：

Planktonic copepod Calanus sinicus is the dominant meso-zooplankton in the Northwest Pacific Ocean. To better understand its population dynamics and phylogeographic patterns, 243 C. sinicus individuals were collected from seven locations across the shelf waters of China and its population genetics was studied by mitochondrial DNA cytochrome oxidase I（mtCOI） sequences analyses. Thirty-nine different sequences, or haplotypes, were detected with moderate haplotype diversity（h=0.749） and low nucleotide diversity（π=0.003） for all populations. The evolutionary divergence between geographic populations varied from 0.24% to 0.37%, indicative of very limited genetic differentiation. Visualized minimum spanning network（MSN） and phylogenetic analysis of all the detected haplotypes did not reveal any clear phylogeographic pattern. Furthermore, AMOVA data showed no significant spatial population differentiation existed among the individuals collected across China shelf waters. Pairwise FST values showed that population collected from northwest of the East China Sea（ECS） displayed a low difference to other populations. Mismatch distribution analyses and neutrality tests indicated that C. sinicus might undergo a demographic/population expansion. No significant population genetic structuring was detected, indicating an extensive gene flow among the C. sinicus populations. Our results provide molecular evidence for the hypothesis that C. sinicus in the northwestern South China Sea in winter is transported from the East China Sea and the Yellow Sea by the China Coastal Current during the northeast monsoon period.