Original Article Biology

Fisheries Science

, Volume 76, Issue 1, pp 75-81

Genetic variability and stock structure of red tilefish Branchiostegus japonicus inferred from mtDNA sequence analysis

  • Kenji NoharaAffiliated withDepartment of Marine Bioscience, Faculty of Marine Bioscience, Fukui Prefectural UniversityNational Research Institute of Far Seas Fisheries, Fisheries Research Agency Email author 
  • , Hiroyuki TakeuchiAffiliated withMiyazu Station, National Center for Stock Enhancement, Fisheries Research Agency
  • , Tatsuo TsuzakiAffiliated withMiyazu Station, National Center for Stock Enhancement, Fisheries Research AgencyTamano Station, National Center for Stock Enhancement, Fisheries Research Agency
  • , Nobuaki SuzukiAffiliated withIshigaki Tropical Station, Seikai National Fisheries Research Institute
  • , Osamu TominagaAffiliated withDepartment of Marine Bioscience, Faculty of Marine Bioscience, Fukui Prefectural University
  • , Tadahisa SeikaiAffiliated withDepartment of Marine Bioscience, Faculty of Marine Bioscience, Fukui Prefectural University

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Abstract

Sequence analysis based on the anterior part of the mitochondrial DNA control region was carried out to reveal the genetic diversity, stock structure, and historical demography of the red tilefish. Nucleotide sequences of 388 bp in length were determined for 280 individuals taken from eight localities. The molecular diversity, haplotype diversity, and nucleotide diversity were relatively high (average h = 0.929 ± 0.011; average π = 0.008 ± 0.005). The mismatch distribution was not significantly different from the expected distribution for a rapidly expanding population (P = 0.453). The minimum spanning network connecting with full-sequence haplotypes contained star-like topologies derived from multiple ancient lineages, supporting the mismatch distribution analysis. No significant genetic differentiation was observed among eight localities (maximum pairwise F ST = 0.023, reduced-sequence data set). Our results suggest a large panmictic population of the red tilefish along the coast of Honshu to the East China Sea.

Keywords

Branchiostegus japonicus Control region Genetic variability Mitochondrial DNA sequence Stock structure