Nesting of Osprey in the industrially developed oil-and-gas areas of the Middle Ob Lowland
Aleksandr A. Emtsev, Candidate of Biological Sciences, Senior Researcher
Surgut State University, Surgut, Khanty-Mansiysk Autonomous Okrug — Ugra, Russia, alemts@mail.ru, https://orcid.org/0000-0002-1496-0171
Aleksandr V. Porgunyov, Chief Specialist
Surgut Forestry, Surgut, Khanty-Mansiysk Autonomous Okrug — Ugra, Russia, alprg@inbox.ru, https://orcid.org/0000-0003-2763-1489
Abstract
The article presents the results of a study of Osprey Pandion haliaetus (Linnaeus, 1758) in the central part of Western Siberia (within the Khanty-Mansiysk Autonomous Okrug — Ugra), which is actively developed by oil and gas companies. Until now there has been a lack of information about this rare cosmopolitan species in the area under consideration. At the same time, local physiographic conditions are favorable for nesting of birds in many watered grounds and lake areas. Targeted data collection was carried out from 2016 to 2022. The authors also analyzed the materials obtained in the course of incidental observations since 2004. The search for nests was carried out mainly during an automobile survey of the most typical habitats by moving along the available roads at low speed. About 2219 km have been covered in this way, the area of about 2817.75 km2 has been covered by the surveys. The total length of air routes is approximately 1177 km. As of 2022, 70 nests were registered. Fedorov oil and gas condensate field near Lakes Kytlor, Imlor, and Savuypeutoylor can boast of high nesting density of ospreys in the upland swamps (up to 7 pairs per 100 km2). In the riverside forests of the Pim River nesting density reached values of approximately 0.15—0.4 pairs/km2. According to extrapolation estimate, the approximate rounded number of adult Ospreys in the Khanty-Mansiysk Autonomous Okrug — Ugra corresponded to 3690—6580 pairs. And it is one of the most considerable ones among those known in the countries of Northern Eurasia or their administrative-territorial units. The spatial distribution of nests in swampy interfluves was determined mainly by the presence of dead or dying trees in suitable habitats. The presence of dead wood is necessary not only to place the nest on the optimal substrate, but also to provide the birds with building material during its construction or repair. 17 nests were found on the transmission towers. Many nesting structures were located near man-made objects, which may indicate some synanthropization of local ospreys. The maximum recorded distance at which individual species took flight when frightened by a human approach was 324 m (n = 3). Nesting of Ospreys in close proximity to nesting places of Red-footed Falcons Falco vespertinus Linnaeus, 1766 and inhabited Osprey nests adjacent to nesting White-tailed Sea-eagles Haliaeetus albicilla (Linnaeus, 1758) were recorded.
Keywords
Pandion haliaetus, habitats, nesting density, nesting substrates, anthropotolerance, the Khanty-Mansiysk Autonomous Okrug — Ugra.
Acknowledgments: The authors express their sincere gratitude to the management of PAO “Surgutneftegas” (Public Joint Stock Company) represented by L. A. Malyshkina, L. R. Trashakhova, S. I. Babyuk, E. Yu. Kulik for organizing research in the areas of Fyodorov oil and gas condensate field, East-Surgut and East-Elovoe oil fields in 2019, and P. A. Puchkin, N. V. Nakonechnyi, M. G. Gusev and Yu. N. Gumenyuk for their assistance in collecting field material
For citation:
Emtsev A. A., Porgunyov A. V. Nesting of Osprey in the industrially developed oil-and-gas areas of the Middle Ob Lowland. Vestnik of Orenburg State Pedagogical University. Electronic Scientific Journal, 2023, no. 3 (47), pp. 34—57. DOI: https://doi.org/10.32516/2303-9922.2023.47.3.
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