On biology and morphology of the Mugli soiuy (Liza haematocheila Temminck & Schlegel, 1845)
This paper provides ecological and biological characteristics of the Mugli soiuy of lower course of the Kuban River (its appearance, distribution, nutrition, growth, specific growth rate, and trade), and morphological characteristics by a set of characters. Absolute values of both linear growth and weight gain get higher with the age, while the specific growth rate decreases. The highest specific growth rate is observed in young immature fishes (0+...2+). Coefficients of variation of meristic and plastic characters of the Mugli soiuy are low - lower than 10% (22 of 47 signs), and average - higher than 11% (25 of 47 signs). The highest level of variability is characteristic of such parameters as length of the base of the first dorsal fin (C<sub>V</sub> - 20.62%), distance between the anus and the anal fin (C<sub>V</sub> - 18.18%), length of the lower jaw (C<sub>V</sub> - 17.33% of the body length, and 17.46% of the head length). Coefficients ofvariation of meristic and plastic characters of the Mugli soiuy do not exceed 25% by any of the parameters used.