Journal of Tropical Oceanography ›› 2021, Vol. 40 ›› Issue (5): 36-44.doi: 10.11978/2020129CSTR: 32234.14.2020129

• Marine Biology • Previous Articles     Next Articles

Population genetic structure and historical dynamics of Trachurus japonicus in the China seas based on mitochondrial control region

REN Huimin1(), ZHANG Heng2, XU Shasha1, LI Shengfa2, LI Jiansheng2, LI Zhihong3,4, HE Lijun1,2,4()   

  1. 1. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
    2. East China Sea Fisheries Research Institute, Chinese Academy of Fishery Science, Shanghai 200090, China
    3. School of Geographic Sciences, East China Normal University, Shanghai 200241, China
    4. Institute of Eco-Chongming, East China Normal University, Shanghai 200241, China
  • Received:2020-11-02 Revised:2021-02-22 Online:2021-09-10 Published:2021-02-25
  • Contact: HE Lijun E-mail:51183904026@stu.ecnu.edu.cn;ljhe@sklec.ecnu.edu.cn
  • Supported by:
    National Key Research and Development Program of China(2018YFD0900902);National Key Research and Development Program of China(2018YFD0900904);Strategic Priority Research Program of Chinese Academy of Sciences(XDB42030203);Shanghai Science and Technology Committee “Science and Technology Innovation Action Plan”“One Belt and One Road” International Cooperation Project of Shanghai(18230743200)

Abstract:

As a dominant fishing species, Trachurus japonicus plays an important role in marine food web. However, T. japonicus experienced rapid collapse in population size and decrease in body size due to environmental pollution and overfishing. To uncover evolutionary influence of anthropic activities on marine species in the China seas, we examined genetic structure and population historical dynamics of T. japonicus based on mitochondrial DNA control region. The results were shown in the following: 1) High haplotype diversity (Hd = 0.998±0.001) and high nucleotide diversity (π = 0.01259±0.00041) of T. japonicus were observed in the study areas; 2) A single star-like bursting lineage was identified in the reconstructed haplotypes network and phylogenetic tree based on maximum likelihood method; 3) Genetic variation of T. japonicus occurred mainly within the populations (99.39%) instead of among different geographic populations according to analyses of molecular variance, and no significant genetic differentiation was observed among the East China Sea shelf, coastal Fujian and Beibu Gulf populations; 4) Recent demographic expansions in the East China Sea shelf, coastal Fujian province, Beibu Gulf and overall populations were consistently suggested by neutral tests and mismatch distribution analysis. Thus, T. japonicus can be managed as a single and genetic homogeneous population in the China seas. Even if high fishing pressure had been kept on T. japonicus during the past several decades, strong recovery potential for this species could still be expected in the China seas.

Key words: Mitochondrial control region, Genetic diversity, Population genetic structure, Population historical dynamics, Trachurus japonicas

CLC Number: 

  • P735.541