Mitochondrial DNA diversity, population structure, and conservation genetics of four native carps within the Yangtze River, China

Guoqing Lu, Sifa Li, Louis Bernatchez

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Silver carp (Hypophthalmichthys molitrix), grass carp (Ctenopharyngodon piceus), bighead carp (Aristichthys nobilis), and black carp (Mylopharyngodon piceus) rank first, second, fourth, and seventh in world fish production. In China, the Yangtze River harbours the most important natural populations of these species. We performed a polymerase chain reaction restriction fragment length poymorphism analysis on 365 juvenile fish representing three nursery grounds to provide a first assessment of the mitochondrial DNA diversity in these species and test the hypothesis that they are composed of more than one genetic stock. The mitochondrial DNA diversity was high in silver, bighead, and black carp, and much less in grass carp. Analysis of heterogeneity of genotype frequency, fixation indices, intersite molecular variance, and localization indices indicated that juvenile silver, bighead, and black carp from different nursery areas belong to genetically distinct populations. These results suggest that their population structure may be determined by the number of environmental settings that permit closure of their life cycle. They also imply that carp from the Yangtze River cannot be managed as a single unit and that human disturbance through exploitation and habitat modifications, in particular the construction of the Three Gorges Dam, will have differential impacts on fish abundance for different parts of the river.

Original languageEnglish (US)
Pages (from-to)47-58
Number of pages12
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume54
Issue number1
DOIs
StatePublished - Jan 1 1997
Externally publishedYes

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Ctenopharyngodon
conservation genetics
Yangtze River
germplasm conservation
carp
mitochondrial DNA
population structure
silver
China
fish
river
grass
nursery ground
gorge
polymerase chain reaction
fixation
harbor
genotype
life cycle
dam

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

Cite this

Mitochondrial DNA diversity, population structure, and conservation genetics of four native carps within the Yangtze River, China. / Lu, Guoqing; Li, Sifa; Bernatchez, Louis.

In: Canadian Journal of Fisheries and Aquatic Sciences, Vol. 54, No. 1, 01.01.1997, p. 47-58.

Research output: Contribution to journalArticle

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