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Abstract <p>The structure of the correlation systems of craniological proportions in the generalized form of the <i>Barbus</i> (=<i>Labeobarbus</i>) <i>intermedius</i> complex from Lake Tana (headwaters of the Blue Nile River) at different body lengths (<i>SL</i>) is analyzed. In the group of small-sized individuals (<i>SL</i> &lt; 15 cm), the characters related to the same section of the skull (neurocranium or splanchnocranium) are most closely correlated with each other. In large-sized fish (<i>SL</i> &gt; 15 cm), the magnitude of correlations between the characters does not correspond strictly to their attribution to one of the skull sections, and some of the splanchnocranium characters are clustered together with those of the neurocranium. The restructuring of the correlation system in the ontogeny of the fish investigated is mainly associated with the trophic specialization of the Lake Tana barbs underlying the adaptive radiation of this group. The assumption is substantiated that the ontogeny of recent representatives of the Lake Tana barbs to a certain extent recapitulates their phylogeny.</p>

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Patterns of Correlations among Phenotypic Characters in the Individual and Historical Development of Barbs of the Barbus (=Labeobarbus) intermedius Complex in Lake Tana, Ethiopia

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • A. N. Mironovsky,
  • A. V. Kozhara,
  • E. E. Slynko

摘要

Abstract

The structure of the correlation systems of craniological proportions in the generalized form of the Barbus (=Labeobarbus) intermedius complex from Lake Tana (headwaters of the Blue Nile River) at different body lengths (SL) is analyzed. In the group of small-sized individuals (SL < 15 cm), the characters related to the same section of the skull (neurocranium or splanchnocranium) are most closely correlated with each other. In large-sized fish (SL > 15 cm), the magnitude of correlations between the characters does not correspond strictly to their attribution to one of the skull sections, and some of the splanchnocranium characters are clustered together with those of the neurocranium. The restructuring of the correlation system in the ontogeny of the fish investigated is mainly associated with the trophic specialization of the Lake Tana barbs underlying the adaptive radiation of this group. The assumption is substantiated that the ontogeny of recent representatives of the Lake Tana barbs to a certain extent recapitulates their phylogeny.