Vole population dynamics: factors affecting peak densities and amplitudes of annual population fluctuations of Microtus pennsylvanicus

• Autorzy: Getz L. L. , Oli M.K. , Hofmann J.E. , McGuire B.
• Języki publikacji: EN

Abstrakty

EN

We studied factors affecting peak densities and amplitudes of fluctuation during 20 annual population fluctuations ofMicrotus pennsylvanicus Ord, 1815 in alfalfa and bluegrass habitats over a 25-year period. Survival was correlated with population density over the 25 years and was the most consistent variable associated with stoppage of population growth. Although not correlated with population density over the 25 years, a decline in the proportion of reproductively active adult females contributed to cessation of growth of population fluctuations that peaked in late autumn-winter, and to cessation of growth of eight of eleven population fluctuations that peaked during summer-early autumn. We conclude variation in survival to be the primary factor affecting peak densities and amplitudes of population fluctuation ofM. pennsylvanicus.

Słowa kluczowe

EN

reproduction; population density; Microtus pennsylvanicus; population fluctuation; population dynamics; vole; meadow vole; rodent; survival

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 2007
• Tom: 52
• Numer: 2
• Opis fizyczny: p.159-170,fig.,ref.

Twórcy

autor

Getz L. L.

• University of Illinois, 505 S.Goodwin Ave., Urbana, IL 61801, USA

autor

Oli M.K.

autor

Hofmann J.E.

autor

McGuire B.

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