Pelagic Larval Dispersal Habits Shape the Weak Population Structure of Thais clavigera in the Coastal Areas of China Sea
Pelagic Larval Dispersal Habits Shape the Weak Population Structure of Thais clavigera in the Coastal Areas of China Sea
Chengrui Yan1, Jing Miao1, Jiantong Feng1, Liping Xia1, Yingying Ye1,2*, Jiji Li1 and Baoying Guo1,2
ABSTRACT
Thais clavigera (T. clavigera) is an ecologically and economically important gastropod species in the coastal regions of China. Compared to other molluscs, T. clavigera has a long planktonic larval period (i.e., ~ two months). In order to identify the relevant factors affecting the genetic structure of T. clavigera, a total of 147 T. clavigera individuals distributed along the Chinese coast from 9 populations were analysed genetically on the bases of cytochrome oxidase I (COI) gene. Analysis of the COI genetics indicated a high level of genetic diversity among T. clavigera. Our analysis of population genetic and demographic (AMOVA, haplotype networks and mismatch distribution) revealed a single genealogical branch and indicated undifferentiation of T. clavigera in the China Sea. Migration dynamic analysis showed that gene flow was asymmetrical and QD as the source population. Additional, canonical correspondence analysis (CCA) analysis between environmental factors (SKT, TOP, SLP, and SUND) and haplotypes indicated that SLP and SUND carried highest influence on the haplotype distribution. SKT and total precipitation TOP were highly correlated with haplotype formation. Combine life story of T. clavigera revealed that environmental factors contribute to the nuances of population genetic in different regions. Understanding the genetic variation and population structure of T. clavigera populations along the coast of China Sea obtained from this study will support the aquaculture management and conservation of T. clavigera in China.
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