BIOLOGIYA MORYA, 2016, Vol. 42, No. 5, pp. 343-348

Diagnostics of morphologically close species of Far Eastern redfins of the genus Tribolodon (Osteichthyes: Cyprinidae) by scale structure

© 2016 V. N. Ivankov¹, V. A. Kaplunenko^{1, 2}, E. E. Borisovets^{1, 2}

¹Far Eastern Federal University, Vladivostok 690091;
²Pacific Research Fisheries Center (TINRO-Center), Vladivostok 690091

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An analysis of the structure of scales from two morphologically close species of Far Eastern redfins of the genus Tribolodon has shown that their species affiliation can be diagnosed not only in adults, but also in immature individuals. The most pronounced inter-species differences between redfins have been observed in case of using a combination of three basic parameters of scales from fish with different body sizes: smaller diameter, greater diameter, and the number of radii. Since the scale parameters exhibit a non-linear relationship with the body size, the basic parameters were logarithmically transformed for the analysis.

Key words: Far Eastern redfins, Tribolodon hakonensis, T. brandti, scale structure, diagnostics of species.