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    Low genetic variation suggest single stock of Kawakawa Euthynnus affinis (Cantor, 1849) along the Indian coast

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    Turk_J_Fish_Aquat_Sci_12_555.pdf (839.4Kb)
    Date
    2012
    Author
    GirishKumar
    Kunal, S.P.
    Menezes, M.R.
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    Abstract
    Kawakawa Euthynnus affinis is an epipelagic migratory tuna species, widely distributed in the tropical and subtropical waters of the Indo-Pacific region. It constitutes the largest tuna fishery in Indian waters. In present study, restriction fragment length polymorphism (RFLP) analysis of the mitochondrial D-loop region was employed to examine the levels of genetic diversity among kawakawa samples collected from eight main fishing zones (Veraval, Ratnagiri, Kochi, Kavaratti, Port-Blair, Tuticorin, Pondicherry and Vizag) along the Indian coast. A 500 bp segment of mitochondrial D-loop region was screened in 400 samples using six restriction enzymes (Rsa I, Alu I, Hinf I, Hha I, Msp I and Hae III), resulting in 13 composite morphs. Analysis of molecular variance (AMOVA) of mtDNA data revealed no significant genetic differentiation among sites (FST=-0.00446, P=0.84946). Results of the genetic analyses of present study suggest the single stock of kawakawa along the Indian coast.
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    http://drs.nio.org/drs/handle/2264/5156
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