Файл	Ном	Сабт карда шуд
Niyozmatova Zarrina Zakhibulloevna	METHODS FOR DETERMINING THE AGE, WEIGHT AND SIZE OF FISH	6

Authors: Niyozmatova Zarrina Zakhibulloevna – PhD Doctoral Student, Lecturer at the Department of Programming, State Educational Institution “Khujand State University named after academician B.Gafurov”. Address: Tajikistan, 735700, Khujand, Toshkhodzhaev Khakim Azimovich - Doctor of Physical and Mathematical Sciences, Professor of the Department of Electronics of the State Educational Institution “Khujand State University named after Academician B. Gafurov”

JOURNAL NUMBER: 4(63). YEAR OF ISSUE: 2022. LANGUAGE OF THE ARTICLE: Tajik

ANNOTATION 

The article discusses methods of determining the age, weight and size of different types of fish in fish farms. In a research study of methods for determining the age, weight and size of fish in the context of fish farms in the Sughd region (LLC Tajik Fish Corporation, LLC Rakhshona) in 2022, the results of experimental calculations and tables were obtained. The dependence of the length and body weight of fish on age is described by the Bertalanffy and Schmalhausen equations  It has been established that in each reservoir where fish is grown, it depends on various parameters (water temperature, oxygen, feed, etc.) [3,с.33-47]. In reservoirs Nos. 3-13, the fish weight gain coefficient was from 1.03 to 2.02, and in ponds (Dekhmoy 1 and 2), the fish weight gain coefficient was from 1.37 to 1.52. The reason for the growth of fish mainly depends on the temperature of water bodies (18-20⁰C), the amount of dissolved oxygen (7 mg / l), pH in the range (6.5-7.5), oxidation should be within 10 mgO₂ / l and saturation with nutrients substances.

KEY WORDS

growth, nutrition, scales, sclerites, artificial reservoirs, aquaculture, fish mass.

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