MORPHOLOGY, AGE AND GROWTH OF EUROPEN BREAM (ABRAMIS BRAMA) IN TUDAKUL RESERVOIR IN UZBEKISTAN

Abstract

Modern ststae of invasive european bream (Abramis brama) was studied in Tudakul reservoir (lower stream of Zarafshen River) in 2020-2022. Fins rays formula was D II 9 - 10, A (I) II 24-27;47-54 scalesin lateral lineand 19-21gil rakers were determined. Plastic indexes according to tradinional for cyprinids so as indexes of «truss protocol» are given. A significant difference in the value of a number of plastic indexes was revealed between immature and matured european bream. The ages of the samples ranged between 1 to 5 years, the total length 144.3 – 444.9 mm, the standard lengths 113.3 – 337.0 mm and total weights 27.0 – 845.1 g. The relationship between the total length (TL) and weight (W) was described by W = 0,0436*TL2,7925 (r=0,98). The mean back calculated total length was 13.2 cm at age I; 23.3 cm, II; 30.1 cm, III; 43.4 cm, IV; 44.0 cm.