Fluctuations of Population Size and Structure in the Northern Mole Vole: Preliminary Analysis |
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Authors: | Evdokimov N. G. |
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Affiliation: | (1) Institute of Plant and Animal Ecology, Ural Division, Russian Academy of Sciences, ul. Vos'mogo Marta 202, Yekaterinburg, 620144, Russia |
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Abstract: | Long-term stationary studies on the ecology of the northern mole vole (Ellobius talpinus Pall.), performed by the mark–recapture method from 1985 to 1997, have provided original data on population dynamics and structure. The analysis shows that, to reveal cyclic fluctuations of population size in this species, the period of three years should be taken as a unit of time for estimating the duration of one phase. The 12-year population cycle in E. talpinus has four distinct phases: an increase, a peak, a decline, and a minimum. At each phase, the population is characterized by certain features of family structure, age composition, birth and death rates, and the composition of migrants. |
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Keywords: | northern mole vole dynamics of population size and structure phases of population cycle age structure birth rate mortality life span migrants (emigrants immigrants intermigrants and transmigrants) |
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