RESULTS OF LARGE MAMMAL MONITORING IN THE ROZTOCHYA NATURE RESERVE OVER 40 YEARS OF OBSERVATIONS, 1984–2025
DOI: http://dx.doi.org/10.30970/sbi.2001.865
Abstract
Background. Long-term wildlife monitoring is crucial for understanding population dynamics and informing conservation strategies. This study presents a 40-year analysis of large mammal communities in the Roztochya Nature Reserve (Western Ukraine). The study period covers two distinct methodological approaches: traditional surveys (1984–2019), which yielded data with significant limitations for quantitative analysis, and modern camera trap monitoring initiated in 2020 to overcome these shortcomings and provide objective, verifiable data on the region’s fauna.
Materials and Methods. Historical data from 1984–2019, collected via transect counts and track surveys, were critically reviewed. From 2020 to mid-2025, a systematic camera trap survey was implemented, with the network expanding from 4 to 20 devices. Analysis focused on species composition, detection frequencies, and seasonal activity patterns. We calculated a relative abundance index to assess recent population trends and compared the effectiveness of the two monitoring approaches.
Results. The camera trap monitoring yielded over 2000 detection days for 13 mammal species. The European roe deer (Capreolus capreolus) was the most frequent species (~53.4 %), followed by the red fox (Vulpes vulpes, ~18 %) and the wild boar (Sus scrofa, ~10 %). A significant increase in detections was observed for roe deer and wild boar in 2023–2024. A key finding was the confirmation of the European wildcat’s (Felis silvestris) regular presence since 2024, changing its status from extremely rare to a permanent resident. The transient status of the grey wolf (Canis lupus) was also confirmed.
Conclusions. The transition to camera trapping provides a more accurate assessment of the mammal community, proving highly effective for detecting rare and elusive species. These results allow for a critical revision of the conservation status of several key species, most notably the European wildcat. The study underscores the importance of the Roztochya Nature Reserve as a key refugium and ecological corridor, with population dynamics likely influenced by recent nationwide changes in hunting management.
Keywords
camera traps, mammals, monitoring, Roztochya Nature Reserve, population dynamics
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Copyright (c) 2026 Yurii Strus, Vasylyna Strus, Ihor Dykyy, Antonina Tarasova
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