Low genetic diversity and temporal stability in the Antarctic toothfish (Dissostichus mawsoni) from near-continental seas of the Antarctica

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Document Number:

WG-FSA-13/07

Author(s):

N.S. Mugue, A.F. Petrov, D.A. Zelenina, I.I. Gordeev and A.A. Sergeev (Russia)

Submitted By:

Sarah Mackey (CCAMLR Secretariat)

Agenda Item(s)

WG-FSA-13 - 10 - Biology, ecology and interactions in fish-based ecosystems

Abstract

We present our data on DNA-analysis of recent (2011-2013) samplings of Antarctic toothfish from CCAMLR Subareas – 48.5 (2013), 48.6 SSRU G (2011), 58.4.1 SSRU G and E (2011), 58.4.2 SSRU E (2011), 88.1 SSRU C (2011), 88.2 SSRU A(2011, 2012), and 88.3 SSRU C (2012). No significant genetic differences between geographic locations or between samples collected in consequent years were observed. Our results, based on analysis of SNP variation of the most informative subset of nuclear genetic markers presented in Kuhn and Gaffney, 2008, do not support temporary stable genetic differentiation of samples from Ross Dependency. Discrepancy in allelic frequency with previously published data was also found for several loci which demand further study on Atlantic toothfish genetics.