Genetic structuring and migration patterns of Atlantic bigeye tuna, <Emphasis Type="Italic">Thunnus obesus</Emphasis>(Lowe, 1839) |
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Authors: | Elena G Gonzalez Peter Beerli Rafael Zardoya |
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Institution: | 1.Department of Biodiversity and Evolutionary Biology,Museo Nacional de Ciencias Naturales, CSIC,Madrid,Spain;2.Department of Biochemistry and Molecular Biology IV,Universidad Complutense de Madrid,Madrid,Spain;3.Department of Scientific Computing,Florida State University,Tallahassee,USA |
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Abstract: | Background Large pelagic fishes are generally thought to have little population genetic structuring based on their cosmopolitan distribution,
large population sizes and high dispersal capacities. However, gene flow can be influenced by ecological (e.g. homing behaviour)
and physical (e.g. present-day ocean currents, past changes in sea temperature and levels) factors. In this regard, Atlantic
bigeye tuna shows an interesting genetic structuring pattern with two highly divergent mitochondrial clades (Clades I and
II), which are assumed to have been originated during the last Pleistocene glacial maxima. We assess genetic structure patterns
of Atlantic bigeye tuna at the nuclear level, and compare them with mitochondrial evidence. |
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