New insights on geographical/ecological populations within Coilia nasus (Clupeiformes: Engraulidae) based on mitochondrial DNA and microsatellites.

Mitochondrial DNA A DNA Mapp Seq Anal

a Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources , Shanghai Ocean University, Ministry of Education , Shanghai , China.

Published: January 2018

AI Article Synopsis

  • - The Coilia nasus is a commercially important fish in China, and research focused on its genetic diversity in Japan and China to support sustainable fishing practices.
  • - The study measured genetic variation using 11 microsatellite loci and mtDNA COI sequences, finding 40 COI haplotypes and 93 microsatellite alleles, but no clear population grouping.
  • - Results indicated some genetic isolation due to the species' amphidromous life cycle, suggesting that geographical distance and fragmented habitats led to the division of sampled populations into four distinct ecological groups.

Article Abstract

The Coilia nasus is an important fish species, which is of commercial values in China. In order to manage the fisheries resources and the development of sustainable fishing strategies to protect this species, 11 microsatellite loci polymorphisms and mtDNA COI sequences were used to examine the genetic diversity of C. nasus in Japan and China. In total, the 40 COI haplotypes and 93 microsatellite alleles were detected. The mtDNA phylogeny did not support population grouping, but the distribution patterns of mtDNA haplotypes and the results of STRUCTURE analysis based on microsatellite indicated a degree of genetic isolation in this species. Our study suggested that the lack of a population genetic structure might result in its amphidromous life cycle, and the geographical distance and habitat fragments might cause isolated populations. Thus, the sampling populations of C. nasus in Japan and China could be divided as four geographical/ecological populations.

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http://dx.doi.org/10.1080/24701394.2016.1261850DOI Listing

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