In this thesis, 3 species of the genus Trachurus were analyzed: T. trachurus, T. mediterraneus, T. picturatus in the northern and central Adriatic. Data from the MEDITS international program from 1996 to 2022 were analyzed. In addition, laboratory processed samples of 282 individuals of T. trachurus and 230 individuals of T. mediterraneus were collected during the expeditions in 2023 and 2024. Trachurus trachurus was caught in the depth range from 21 to 383 m, T. mediterraneus at depths from 21 to 271 m, and T. picturatus from 31 to 318 m. All 3 species were found in all depth strata. The species T. trachurus and T. picturatus record the highest abundance indices in the stratum 100-200 m, while T. mediterraneus in the stratum 10-50 m. The total body length of T. trachurus ranged from 10 to 460 mm, T. mediterraneus from 10 to 415 mm, and T. picturatus from 80 to 375 mm. The results of the analysis of the length-weight relationship in the species T. trachurus indicate isometric growth (b=3.0278), while in T. mediterraneus negative allometry was determined (b=2.7983). The sex ratio of T. trachurus was 43.91 %, which shows the dominance of males, while for the species T. mediterraneus it was 50.55 %, which indicates the predominance of females. The percentages of maturity stages showed the dominance of individuals in the maturation phase of the species T. trachurus for both sexes (females: 43.87 %, males: 51.01 %). In the case of the species T. mediterraneus, females were dominantly in the spawning phase (39.86 %), while among the males there were the most individuals in the maturation phase (57.49 %).