. 1998. Spatial behaviour and population dynamics of woodland rodents. Acta Theriologica 43: 137-161.Population dynamics and spatial behaviour of the vole Clethrionomys glareolus (Schreber, 1780) and the yellow-necked mouse Apodemus flauicollis (Melchior, 1834) were studied for 7 years in woodland of Kampinos National Park, Poland. Mice were more mobile and less site-tenacious than voles. Annual peaks ranged from 9 to 104 voles and from 4 to 62 mice per ha. The highest densities of both species were preceded by winter breeding. The greatest movement range and the longest distance moved were observed in the years of low density, whereas in the high density year both species were least mobile and most site-tenacious. Intensive movements in the low density years led to early maturation, high turnover rates, and probably increased mortality. Low mobility and high site tenacity in the high density year enhanced population growth and suppressed maturation. Increasing density and cessation of breeding accounted for declining juvenile recruitment. Differences in movement patterns between years of low and high density were coupled with differences in the autumn age structure and winter mortality of both species.
Ewa RAJSKA-JURGIEL Rajska-Jurgiel E. 2000. Breeding dispersal in Clethrionomys glareolus females. Acta Theriologica 45: 367-376.Spatial behaviour of female voles Clethrionomys glareolus (Schreber, 1780) was studied for 7 years in woodland of Kampinos National Park, Poland. Annual peaks ranged from 25 to 40 voles per ha. Twenty-six percent of newly marked females were already fully-grown adults. Immature females were slightly less site-tenacious than mature ones. The total movement range does not differ much between immature and mature recruits. Home range shifts between successive trapping sessions were the longest in maturing females but also prevalent in pregnant or lactating ones. Nonmaturing females as well as mature but not breeding ones were the least mobile and the most site-tenacious. The home range length and between-capture distances were greater for pregnant than for immature females. They were also greater for transients than residents. Extensive movements of reproducing females suggests that breeding dispersal may thus be much more widespread amongst Clethrionomys females than previously thought.
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