Phylogeography and population structure of Lagocephalus spadiceus (Richardson, 1845) (Tetraodontiformes, Tetraodontidae) in the South China Sea

Author:

Xu Hao12ORCID,Huang Liangliang13ORCID,Chen Tao4ORCID,Wang Caiguang12,Wu Zhiqiang13,Cheng Yanan12,Su Qiongyuan12,Kang Bin5ORCID,Yan Yunrong6,Zhang Xiuguo7

Affiliation:

1. College of Environmental Science and Engineering Guilin University of Technology Guilin China

2. Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control Guilin China

3. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas Guilin China

4. College of Basic Medicine Guilin Medical University Guilin China

5. Fisheries College Ocean University of China Qingdao China

6. Fisheries College Guangdong Ocean University Zhanjiang China

7. Guangxi Jinggong Marine Science and Technology Ltd Beihai China

Abstract

AbstractThe climate fluctuations during the Late Pleistocene significantly influenced the phylogeographic structure and historical dynamics of marine fishes in the marginal seas of the western Pacific Ocean. The puffer fish, Lagocephalus spadiceus, holds substantial nutritional and economic value in the South China Sea. To investigate the demographic history and population structure of the L. spadiceus, the mitochondrial DNA COI and Cyt b gene datasets from 300 individuals across eight populations in the South China Sea were sequenced. Our findings revealed high haplotype diversity (0.874 ± 0.013) and low nucleotide diversity (0.00075 ± 0.00058). The phylogenetic tree and haplotype networks revealed no significant genetic differentiation along the northern coast of South China Sea. Neutrality tests, mismatch distribution analyses, and Bayesian skyline plots suggested that L. spadiceus underwent population expansion during the Late Pleistocene. Both ocean currents and climate change significantly influenced the geographical distribution and genetic population structure of L. spadiceus.

Funder

Guangxi Key Research and Development Program

National Natural Science Foundation of China

Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation

Publisher

Wiley

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