Abstract:
Adaptation to new, changing abiotic living conditions, population growth in recent years could and should have influenced changes in the general basic biological indicators of the perch herd, which necessitated the study of these changes to form preliminary recommendations for the rational use of the herd by industry. The analysis of the morphological status of three separate groups of river perch of the Dnieper - Bug estuary region, showed significant sex, age and geographical differences. The most pronounced dimensional sexual dimorphism was manifested by five features, the coefficient of series differentiation ranged from 3.0 to 21.1, size - age dimorphism was manifested by seven features, the coefficient of differentiation ranged from 3.70 to 25.50 geographical variability of the considered plastic was observed on six signs. The coefficient of series differentiation ranged from 3.1 to 30.5.
