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Home ranges, nest sites and population dynamics ofthe forest dormouse Dryomys nitedula (Pallas)in an oak-hornbeam forest: a live-trappingand radio-tracking study

Ściński Michał, Borowski Zbigniew

Polish Journal of Ecology

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2006

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Vol. 54, nr 3

391-396

EN

Population dynamics, space use and interspecific interactions of the forest dormouse Dryomys nitedula were studied for four years in an oak-hornbeam forest in the Białowieża Primeval Forest (NE Poland). Animals were captured with live-traps and marked by ear-tattooing. Population density ranged from 1.4 to 18.6 individuals x 10 ha^-1. Dormice reproduced in all years of study (2001-2004). Offspring were born in June and first juveniles were caught at the beginning of August. The last dormice were captured at the end of September. Three forest dormice (1 male and 2 females) were radio-tracked during first half of June 2001. Male home range area was larger (4.2 ha) than home range areas of females (0.75 and 0.73 ha). The longest distance between two consecutive daytime nest sites was 275 m for the male and 126 m for the females. Average home range length calculated from radio-tracked individuals (218 m) was larger than the one from live-trapped dormice (93 m). Dormice used bird nest boxes and tree hollows for daytime nest sites. They preferred nesting in the nest boxes previously occupied by birds and they used old bird nest material for the nest construction. Home ranges of radio-tracked forest dormice overlapped widely with home ranges of fat dormice Glis glis. Most of live-traps used by the forest dormouse were also visited by the fat dormouse.

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Factors determining the distribution of coexisting dormouse species (Gliridae, Rodentia)

Bakó Botond, Hecker Kristóf

Polish Journal of Ecology

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2006

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Vol. 54, nr 3

379-386

EN

This study investigated coexistence of three dormouse species living in the same habitat, Naszaly-hill, in the north-eastern part of the Danube-bend (47 degrees 49'N, 19 degrees 08'E). The vegetation of the area is very diverse, comprising a mosaic of orchards with natural forests and forest plantations. Data were collected from 1999 to 2005 with wooden nest boxes and from 2002 to 2005 also plastic nest tubes were used. Study area was approximately 6 ha. All three species (hazel dormouse Muscardinus avellanarius L., forest dormouse Dryomys nitedula Pall, and fat dormouse Glis glis L.) have different ecological requirements. However, they occurred simultaneously in some microhabitats and in some places one species clearly predominated. We also observed how the ongoing succession process in the former orchards affected the distribution of dormice. There were seasonal differences in timing of emergence from hibernation, greatly affecting spatial distribution of the different species. Hazel dormice were first to appear in nest boxes and/or tubes, in March, then forest dormice in April and fat dormice in June. As numbers of fat dormice increased the smaller species withdrew from using the nest boxes. Fat dormice reached peak numbers in summer and they entered hibernation by October.

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Abundance and activity of the edible dormouse (Glis glis L.) in the Zhiguli Mountains (Russia, Middle Volga Region)

Ivashkina Victoria A.

Polish Journal of Ecology

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2006

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Vol. 54, nr 3

337--344

EN

The object of study was the most eastern population of the edible dormouse (Glis glis L.), inhabiting the Zhiguli Mts. (Russia). Numbers of the edible dormouse in different sites, factors relating to its distribution, seasonal population dynamics, postnatal development and activity were studied. Live-trapping was the main study method. The dormice were also studied under laboratory conditions. The most preferred type of forest was lime-oak forest. Dense undergrowth played an important role in distribution of dormice. Number of dormice in studied region was relatively high and stable.