This research is devoted to the variability of linear and weight growth of Sander lucioperca (Stizostedion lucioperca) in the Novosibirsk water-storage basin. The presented work is part of a comprehensive research of Sander lucioperca phenotypic pool of the Novosibirsk water-storage basin. 43 individuals have been selected for the analysis aged 3,0–4,5 years in the period October-November 2019. Measurements of Sander lucioperca have been carried out according to the “Manual for the study of fi sh”, the fi sh has been weighed on a technical scale VLKT-500 with an accuracy of 1 g. The fi rst time the linear and some aspects of the weight growth of Sander lucioperca in the Novosibirsk water-storage basin have been described in the paper, since the growth directly depends on the development and is one of its components. The biological characteristics and features of Sander lucioperca have been analyzed. For the development of the population of Sander lucioperca as well as other fi sh species one of the main biotic factors is the feed supply. The availability of feed for hydrobionts is determined by the quantity, quality and availability of feed in the reservoir, since the feed supply has a signifi cant impact on the biological parameters of fi sh. The ecological situation of the Novosibirsk water-storage basin has been studied. The obtained data on Sander lucioperca measurements can be used as average population values. Increasing the parameters of the assessment of living organisms makes it possible to more accurately assess the conformation of animals. A high level of correlation (r=0,878) between the linear and weight growth of Sander lucioperca has been established, and a regression equation describing the change in length as a function of live weight (y = 9,5853 x + 39,1164) has been calculated. There is a tendency to decrease the number of Sander lucioperca in the Novosibirsk water-storage basin.
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