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Abstract <p>Changes in bank vole numbers were analyzed based on long-term observations (1965–2014). Material (4925 specimens) was collected in Karelia using standard methods. That fundamental habitat was chosen to avoid the influence of succession changes on mammal numbers. Both autocorrelation and spectral (harmonic) analyses were applied. It is shown that the mechanisms of restraining the population growth start at the level of 2.2 s./100 cage-24 hours. Analyses of averaged data for the May–September period, as well as for the period of maximum abundance (August) yielded similar results. Correlation analysis revealed periodicity in temporal series, based only on groove capture data (4–6 years). Harmonic analysis showed 6- to 9‑year-long intervals in rodent numbers change. Recurrence was low in the conditions of Karelia, as well as over most of the distribution area. Analyses of changes in bank vole abundance in a single fundamental forest type in August revealed a more evident frequency than those using generalized data covering different habitats.</p>

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A Statistical Analysis of Long-Term Changes in the Numbers of the Bank Vole, Clethrionomys glareolus Schreber, in the Northwestern Part of Its Distribution Area

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • E. V. Ivanter

摘要

Abstract

Changes in bank vole numbers were analyzed based on long-term observations (1965–2014). Material (4925 specimens) was collected in Karelia using standard methods. That fundamental habitat was chosen to avoid the influence of succession changes on mammal numbers. Both autocorrelation and spectral (harmonic) analyses were applied. It is shown that the mechanisms of restraining the population growth start at the level of 2.2 s./100 cage-24 hours. Analyses of averaged data for the May–September period, as well as for the period of maximum abundance (August) yielded similar results. Correlation analysis revealed periodicity in temporal series, based only on groove capture data (4–6 years). Harmonic analysis showed 6- to 9‑year-long intervals in rodent numbers change. Recurrence was low in the conditions of Karelia, as well as over most of the distribution area. Analyses of changes in bank vole abundance in a single fundamental forest type in August revealed a more evident frequency than those using generalized data covering different habitats.