Ecological connectivity of the Qiongzhou Strait: a case form Orangefin Ponyfish (Photopectoralis bindus) haplotype diversity and genetic structure
文献类型： 外文期刊
作者： Xu, Lei 1 ; Zhang, Jinxia 1 ; Wang, Xuehui 1 ; Chen, Qinghua 6 ; Tang, Quehui 1 ; Wang, Lianggen 1 ; Ning, Jiajia 1 ; Li, Yafang 1 ; Liu, Shuangshuang 1 ; Huang, Delian 1 ; Du, Feiyan 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou, Peoples R China
2.Guangdong Prov Key Lab Fishery Ecol & Environm, Guangzhou, Peoples R China
3.Sanya Trop Fisheries Res Inst, Sanya, Peoples R China
4.Shanghai Ocean Univ, Coll Marine Sci, Shanghai, Peoples R China
5.Minist Agr & Rural Affairs, Key Lab Marine Ranching, Guangzhou, Peoples R China
6.South China Inst Environm Sci, Guangzhou, Peoples R China
关键词： haplotype pattern; genetic structure; Leizhou Peninsula; The South China Sea; historical demography
期刊名称：FRONTIERS IN MARINE SCIENCE （ 影响因子：3.0； 五年影响因子：3.8 ）
ISSN：
年卷期： 2024 年 11 卷
页码：
收录情况： SCI
摘要： Grasping the genetic structure of marine fish populations is vital for comprehending species connectivity patterns and determining the appropriate spatiotemporal scales for conservation management strategies. Here, we analyzed the population genetics of the Orangefin Ponyfish (Photopectoralis bindus Valenciennes, 1835) by examining a portion of the gene coding for the mitochondrial cytochrome c oxidase subunit I. The aim was to evaluate the haplotype pattern, genetic structure, demographic history, as well as the influence of ecological connectivity through the Qiongzhou Strait on the distribution patterns of this species in the northern South China Sea and the Beibu Gulf. In total, 257 specimens yielded only 13 haplotypes, with the predominant haplotype present at all sampling locations. The analysis revealed a "star-like" haplotype pattern, indicating low levels of both haplotype and nucleotide diversity. Additionally, a small but significant genetic structure was observed between the coastal regions flanking the Leizhou Peninsula. These patterns in the haplotype network and genetic structure may be significantly influenced by contemporary currents, particularly through the connectivity of the Qiongzhou Strait. Tajima's D and Fu's Fs demonstrated pronouncedly negative values, along with a unimodal mismatch distribution, suggested a recent demographic expansion of Photopectoralis bindus during the late Pleistocene, likely influenced by fluctuations in sea levels.
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