Comparative characteristic of morphometric indicators of Carassius auratus in the Inza (Yenisey river system)

The article compares the morphometric parameters of the biology of crucian silver in the Inza river of the Krasnoyarsk Territory during the period of research for 2016-2017. Namely, the sex structure of the population of Carassius auratus was determined by the determination of sexual characteristics in males and females, as a result of which the females (the phenomenon of gynogenesis) were the predominant component. Scales were collected from the sides in the middle of her body to determine the age. It was found that the largest number of individuals of age 2+ - 4+, which is associated with the activity in the diet. The greatest increase and weight gain, which are the most important indicators of life expectancy, conditions of existence and time of sexual maturity, are noted at the age of 3+.