SEXUAL DIMORPHISM AND GENETIC DIVERSITY OF THE CARASSIUS CARASSIUS POPULATION IN THE EUTROPHIC WATER BODY OF THE TURA RIVER BASIN

Mariya I. Bitner; Natal&#039;ya Smolina; Yaroslav Utkin

doi:10.36906/2311-4444/25-4/06

SEXUAL DIMORPHISM AND GENETIC DIVERSITY OF THE CARASSIUS CARASSIUS POPULATION IN THE EUTROPHIC WATER BODY OF THE TURA RIVER BASIN

Published in Bulletin of Nizhnevartovsk State University · Pages 70–83 · Rubric: Animal Ecology

DOI: https://doi.org/10.36906/2311-4444/25-4/06

Received: 25.09.2025 Accepted: 10.10.2025 Published: 25.12.2025 Language of publication: ENG

Authors

Mariya I. Bitner

ORCID SPIN

Natal'ya Smolina

ORCID

Yaroslav Utkin

ORCID

Mariya I. Bitner

Nizhnevartovsk State University Russian Federation · Nizhnevartovsk

ORCID SPIN

Natal'ya Smolina

Academic degree: candidate of sciences in biology

Tyumen State University Russian Federation · Tyumen

ORCID

Yaroslav Utkin

Academic degree: candidate of sciences in biology

Institute of Molecular and Cellular Biology SB RAS Russian Federation · Novosibirsk

ORCID

ABSTRACT

. The study aimed to identify sexual differences and genetic diversity of the crucian carp Carassius carassius (Linnaeus, 1758) inhabiting a eutrophic reservoir of the Tura river basin (Western Siberia). This species has been dynamically declining in numbers in Eurasian waters in recent decades [5; 15; 16; 19]. During the study, a biological analysis of 100 individuals of the crucian carp was conducted, including the determination of morphometric characteristics and the area of erythrocyte nuclei. The study showed that this population is characterized by a short dwarf form with a sex ratio of 1: 1, where all individuals in the sample had the fourth stage of gonadal maturity. Reliable sex differences in size-weight and meristic traits were revealed. Females were distinguished by a greater commercial length and body weight, and also had reliably higher values for 55.6% of the studied meristic traits. Analysis of the erythrocyte nuclear area showed that all individuals were diploids, while sex differences in this indicator were not significant. Genetic analysis of mtDNA revealed a single CCA2 haplotype, which indicates low genetic diversity of this population. The results of the study emphasize the need to monitor changes in the population structure of golden crucian carp and develop measures to preserve this species.

KEYWORDS

golden crucian carp; haplotype; population structure; eutrophic reservoir

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This work is licensed under Creative Commons Attribution 4.0 International Creative Commons

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Bitner M., Smolina N. V., Utkin Y. A. SEXUAL DIMORPHISM AND GENETIC DIVERSITY OF THE CARASSIUS CARASSIUS POPULATION IN THE EUTROPHIC WATER BODY OF THE TURA RIVER BASIN // . 2025. pp. 70-83. DOI: https://doi.org/10.36906/2311-4444/25-4/06. (Date of access 19.08.2026).

MLA

Mariya I. Bitner, Smolina N. V., Utkin Y. A.. "SEXUAL DIMORPHISM AND GENETIC DIVERSITY OF THE CARASSIUS CARASSIUS POPULATION IN THE EUTROPHIC WATER BODY OF THE TURA RIVER BASIN." (2025): 70-83. DOI: https://doi.org/10.36906/2311-4444/25-4/06.

APA

Bitner M., Smolina N. V., Utkin Y. A. (2025). SEXUAL DIMORPHISM AND GENETIC DIVERSITY OF THE CARASSIUS CARASSIUS POPULATION IN THE EUTROPHIC WATER BODY OF THE TURA RIVER BASIN. , 70-83. https://doi.org/10.36906/2311-4444/25-4/06

Chicago

Mariya I. Bitner, Smolina N. V., Utkin Y. A.. "SEXUAL DIMORPHISM AND GENETIC DIVERSITY OF THE CARASSIUS CARASSIUS POPULATION IN THE EUTROPHIC WATER BODY OF THE TURA RIVER BASIN." , no. (2025): 70-83. https://doi.org/10.36906/2311-4444/25-4/06.

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{{cite journal | author = Bitner M., Smolina N. V., Utkin Y. A. | title = SEXUAL DIMORPHISM AND GENETIC DIVERSITY OF THE CARASSIUS CARASSIUS POPULATION IN THE EUTROPHIC WATER BODY OF THE TURA RIVER BASIN | journal = | year = 2025 | pages = 70-83 | doi = 10.36906/2311-4444/25-4/06 }}

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SEXUAL DIMORPHISM AND GENETIC DIVERSITY OF THE CARASSIUS CARASSIUS POPULATION IN THE EUTROPHIC WATER BODY OF THE TURA RIVER BASIN

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