Genetic variation on mtDNA Cytb sequence of three populations of Chilean jack mackerel (Trachurus murphyi ) from the Southern Pacific Min ZHANG, Yong-jiu.

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Genetic variation on mtDNA Cytb sequence of three populations of Chilean jack mackerel (Trachurus murphyi ) from the Southern Pacific Min ZHANG, Yong-jiu XU, Cheng-hui WANG College of Marine Sciences College of Fishery and Life Science Shanghai Ocean University ， China)

Samples collection beyond Chile’s EEZ  OEZ2006—22 samples  OEZ samples collected inside of Chile’s EEZ in bought from fish market of Valparaiso port.  IEZ samples

Species Sampling area Locality GeneBank Access ion No LatitudeLongitude Cytb T.murphyi OEZ °30.0′S 34°30.0′S 94°3 0.0 ′W 95°3 0.0 ′W fishing ground- T.murphyi OEZ °30.0′S 35°30.0′S 92°3 0.0 ′W 94°3 0.0 ′W fishing groundAY T.murphyi IEZ °02.0′S 71°3 9.0 ′W Valparaiso port-

Results 11 haplotypes were found in 39 analyzed samples only one haplotype was shared among three populations, which has 23 polymorphic sites in analyzed 730 bp sequence.

3 and 22 polymorphic sites were detected in OEZ2006 and OEZ2007 respectively, No sequence variation was found in IEZ2006 The haplotype diversity ratios were , and ; and nucleotide diversity ratios were , and in OEZ2006, OEZ2007 and IEZ2006 respectively.

AMOVA analysis indicated that no significant genetic divergence among three populations. NJ tree showed that all individuals from three populations clustered into one clade. Conclusion: the three fish stocks of Chilean Jack mackerel inside and outside of EEZ in the Southern Pacific could be one population