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SEX RATIO IN MALLARDS ANAS PLATYRHYNCHOS WINTERING ON THE MOSKVA RIVER IN THE KOLOMENSKOYE MUSEUM-RESERVE

Ecology , UDC: 598.252:574.34 DOI: 10.24412/2076-9091-2025-460-8-26

Authors

  • Rezanov Alexander Gennadievich Doctor of Biological Sciences, Associate Professor

Annotation

The article analyzes the sex ratio of Anas platyrhynchos mallards wintering on the Moskva River within the boundaries of the Kolomenskoye Museum-Reserve in the period from winter 2017/2018 to winter 2022/2023, inclusive. Trends in the dynamics of the number of males and females, as well as trends in the sex ratio index (SRI) of mallards in different years within the functioning of the wintering ornithocomplex are presented. Aspects of the influence of the temperature factor on the dynamics of the SRI and the number of male and female mallards during the wintering period are discussed. The index of the SRI in mallards during the wintering period is quite stable, although insignificant fluctuations in the average indicators for wintering were noted (SRI = 1.12 – 1.38 ± 0.19 – 0.28). By the time the wintering ornithocomplex is disbanded, the SRI is approaching 1.
Tags:
Kolomenskoye Museum-Reserve , mallard , sex ratio index , temperature influence , Wintering

How to link insert

Rezanov, A. G. (2025). SEX RATIO IN MALLARDS ANAS PLATYRHYNCHOS WINTERING ON THE MOSKVA RIVER IN THE KOLOMENSKOYE MUSEUM-RESERVE Bulletin of the Moscow City Pedagogical University. Series "Pedagogy and Psychology", № 4 (60), 8. https://doi.org/10.24412/2076-9091-2025-460-8-26
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