The genetic diversity in Pseudosciaena polyactis, Trichiurus lepturus, Eupleurogrammus muticus and the molecular phylogeny of eight Sciaenoid species in the neritic waters of China
石首鱼科（Sciaenidae）和带鱼科（Trichiuridae）鱼类是我国“四大渔业”的主要组成，许多种类如小黄鱼（PseudosciaenapolyactisBleeker1877）、带鱼（TrichiuruslepturusLinnaeus1785）等为重要的海洋渔业捕捞对象。然而，持续多年的过度捕捞和栖息地的破坏，已经造成经济种类资源的严重衰竭，并出现种群结构简单化，个体小型化和性早熟等异常现象。 现代遗传学观点认为，一个物种的遗传多样性高低与其适应能力、生存能力和进化潜力密切相关，遗传变异是有机体适应环境变化的必要条件。因此，研究物种的遗传结构和遗传分化，揭示其遗传多样性水平是生...The thesis mainly contains three parts as followings: Part one: The genetic diversity in Pseudosciaena polyactis P. polyactis is a commercially important fish species and widely distributed in the Bohai Sea, the Yellow Sea and the northern part of the East China Sea. For the purpose of conservation and sustainable utilization of this valuable species, it was necessary to investigate the genetic ...学位：理学博士院系专业：海洋与环境学院海洋学系_海洋生物学学号：B20002700
