Phenetic relationships and probable ways of morphological diversification of the African large barbs (<Emphasis Type="Italic">Barbus intermedius</Emphasis> complex) in Lake Tana (Ethiopia) |
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Authors: | M V Mina A N Mironovsky D V Kapitanova |
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Institution: | 1.N.K. Koltsov Institute of Developmental Biology,Russian Academy of Sciences,Moscow,Russia;2.A.N. Severtsov Institute of Ecology and Evolution,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | 29 quantitative and 18 qualitative skull characters were studied in the African large barbs (Barbus intermedius complex) from Lake Tana (Ethiopia). Based on results of principle components analysis phenetic relationships of 12 morphotypes
were assessed. External features diagnostic of the morphotypes were found in individuals substantially different in the skull
characters. The obtained data along with the data on morphological diversity of large barbs from Ethiopia beyond the Lake
Tana basin suggest origination of the Lake Tana complex of forms from a complex of forms that existed in the upper reaches
of the Blue Nile before the lake came into being, and the extant morphotypes of the Lake Tana barbs originated from three
or four forms that composed the ancestral riverine local complex. |
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