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1
Content available remote The Bank vole population in Crabapple Island
Bujalska G.
Polish Journal of Ecology
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2000
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Vol. 48, Suppl.
97-106
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.
2
Content available remote Territoriality and its consequences
Bujalska G., Saitoh T.
Polish Journal of Ecology
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2000
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Vol. 48, Suppl.
37-49
EN
A survey of the literature on territoriality of mature female bank voles is presented, with particular reference to the idea of breeding territority and female behavior aimed at the territory defense. Territory (breeding area) is part of home range (foraging area), and its biological meaning is disputable: either it provides food resources for the young or progeny safety. Breeding territories of males are also discussed. Genetic analyses showing kin groups of females and their reproductive succes are important for our understanding of evolution of female territoriality. Attention was also paid to spacing behavior of territorial males and females and the resulting mating system that allows for cases of multiple paternity. Another disputable aspect of female territoriality is its possible importance for stamility of breeding rate and, as consequence, for decrease in variation of population numbers.
3
Content available remote Bank voles and yellow-necked mice : what are interrelations between them?
Grüm L., Bujalska G.
Polish Journal of Ecology
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2000
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Vol. 48, Suppl.
141-145
EN
Literature survey has revealed similarity of ecological niches of bank voles and yellow-necked mice. Behavioral observations that show subordination of bank voles to yellov-necked mice suggest that the latter is a superior competitor. Nevertheless, neither spatial nor time separation of those species can be evidenced. Competition between these species seems to be occasional (or rare). Perhaps, their microhabitat niches are sufficiently separated to allow coexistence.
4
Content available remote Bank vole biology : recent advances in the population biology of a model species
Bujalska G., Hansson L.
Polish Journal of Ecology
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2000
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Vol. 48, Suppl.
5-7
5
Content available remote Advances in the population biology of the bank vole : some conclusions and proposals for future studies
Bujalska G., Hansson L.
Polish Journal of Ecology
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2000
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Vol. 48, Suppl.
233-235
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