| Issue № 1 |
Original research |
pdf-version |
On the latitudinal distribution of gastropods of the genera Boreoelona and Opisthorchophorus in the reservoirs of Western Siberia
| Andreeva Svetlana Iosifovna | DSc, Professor, Omsk State University of Railway Transport, 35 Marx ave., Omsk, Omsk oblast, Russia, siandreeva@yandex.ru |
| Grishina Yulia Borisovna | PhD, associate professor, Omsk State University of Railway Transport, 35 Marx ave., Omsk, Omsk oblast, Russia, gubuly@mail.ru |
| Krasnogorova Anastasia Nikolaevna | PhD, associate professor, Omsk State Transport University, 35 Marx ave., Omsk, Omsk oblast, Russia, krasnogorova@inbox.ru |
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Keywords: Bithyniidae species richness latitude range |
Summary: The article presents the results of an analysis of long-term data on the distribution of freshwater gastropods of the genera Boreoelona and Opisthorchophorus in the waters of Western Siberia. These include the Tyumen region, the Yamalo-Nenets and Khanty-Mansi Autonomous Okrugs, Tomsk, Novosibirsk, and Omsk regions, Northern and partially Central Kazakhstan. The source materials were collected in 1972, 1973, 1981, 2000, 2003, 2005–2014, 2017, and 2019–2024 in 124 water bodies of various types: coastal zone of rivers, tributary water bodies of rivers, reservoirs, and floodplain and non-floodplain lakes. The presence of 2 species of the genus Boreoelona and 5 species of the genus Opisthorchophorus was revealed. It was established that the distribution of the identified species was characterized by significant variability depending on the latitude of the area. According to the distribution features, three groups of species are distinguished. The first group of species with a wide latitude range for the studied region includes Boreoelona contortrix, B. sibirica and Opisthorchophorus abakumovae, found mainly in the northern regions of Western Siberia. The second group of species contains O. baudonianus and O. valvatoides, it prefers the middle latitudes of the region. The third group includes species with a relatively broad latitude distribution in the study region, but tending to the central part of the region, namely O. confusus and O. troscheli. The recent findings of O. confusus and O. troscheli in the northern regions may be related to the warming observed in recent years. At high latitudes (north of 65° N), Bithyniidae are found only in the tributary waters of the Lower Ob and occasionally in the estuarine zones of the Ob tributaries. Thus, the assumption is confirmed that the large rivers of Western Siberia serve as natural highways for the movement of freshwater Gastropoda over significant distances. © Petrozavodsk State University |
Received on: 03 November 2025 Published on: 27 March 2026 | |
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