The Bank vole population in Crabapple Island

• Autorzy: Bujalska G.
• Języki publikacji: EN

Abstrakty

EN

The results of studies on demography of an island population of Clethrionomys glareolus are presented. Population numbers and structure were estimated 5 times a year in 1966-1999. Two patterns of seasonal changes in population size were found: either continuous, slow increase from April (beginning of the breding season) to October, with maximum density below 50 individuals per hectare, or rapid increase resulting in a July/September peak with maximum density up to 153 individuals per ha. The highest variations in number occurred in April (Whittaker's CF=2.05) and decreased with advancement of the breeding season: in September CF=1.49. The mechanism accounting for the decrease was territoriality of mature females. Fluctuating July population numbers revealed cyclic changes, namely a 3,8-year as well as a 9,4-year cycle. It is postulated that social relations between neighboring individuals rather than mean population density affect changes in population numbers.

Słowa kluczowe

EN

cycling; population numbers; reproduction; space-dependence; survival

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2000
• Tom: Vol. 48, Suppl.
• Strony: 97--106
• Opis fizyczny: Bibliogr. 40 poz., tab., fot., wykr.

Twórcy

autor

Bujalska G.

• Institute of Ecology, PAS, 05-092 Łomianki, Dziekanów Leśny, Poland

Bibliografia

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