Comparative Population Genetics of Two Alvinocaridid Shrimp Species in Chemosynthetic Ecosystems of the Western Pacific

Qi Dai, Ting Xu*, Yixuan Li, Yanan Sun, Yitao Lin, Takuya Yahagi, Maeva Perez, Pei-Yuan Qian, Jian-Wen Qiu*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

Abstract

Deep-sea shrimps from the family Alvinocarididae are prominent inhabitants of chemosynthesis-based habitats worldwide. However, their genetic diversity and population connectivity remain poorly understood due to limited sampling. To fill these knowledge gaps, we compared the population genetics of two vent- and seep-dwelling alvinocaridid species with overlapped geographic ranges between the South China Sea and the Manus Basin. Alvinocaris longirostris has a wider distribution, ranging from 35°N to 3°S and at depths of 930 to 1736 m, while Alvinocaris kexueae is more restricted, found between 16°N and 3°S at depths of 1300 to 1910 m. Our analysis, based on the mitochondrial cytochrome c oxidase subunit 1 gene, revealed that A. longirostris had lower genetic diversity and minimal genetic differentiation across eight disjoint vent and seep populations. In contrast, the narrower-distributed A. kexueae exhibited higher genetic diversity and significant genetic differentiation, with stronger gene flow observed from its Haima seep population to the Manus Basin vent population. In addition, both species appear to have experienced population expansion in their recent evolutionary history. These results suggest that A. longirostris and A. kexueae may possess distinct life-history traits that contribute to their differing distribution ranges in the Western Pacific.
Original languageEnglish
Number of pages13
JournalIntegrative Zoology
DOIs
Publication statusE-pub ahead of print - 27 Jan 2025

Scopus Subject Areas

  • Animal Science and Zoology

User-Defined Keywords

  • Alvinocarididae
  • biogeography
  • chemosynthesis-based ecosystem
  • genetic diversity
  • population connectivity

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