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1

Can demographic parameters be estimated from capture-recapture data on small grids? A test with forest rodents

100%
Schlesser M., Le Boulenge E., Schtickzelle N.
Acta Theriologica
|
2002
|
tom 47
|
nr 3
This preliminary study proposes small trapping grids as an alternative to traditional large grids for the simultaneous monitoring of several rodent populations by capture­-recapture. Monthly trapping sessions of wood mouse Apodemus sylvaticus (Linnaeus, 1758) and bank vole Clethrionomys glareolus (Schreber, 1780) were carried on over a small area (0.015 ha, 21 traps). The coherence of demographic parameter estimates on such small grids with those obtained on classical large grids was checked by performing two trapping sessions on a larger grid (0.9 ha, 110 traps, 10 m mesh) surrounding the small grid. We compared the two grid designs on the basis of sex ratio upon first capture, trap saturation rate, minimum number alive (MNA), monthly survival, and trappability. These demographic parameters proved to be non-biased by the trapped area, even though the precision was lower on the small grid. Small grids seem therefore to give the same picture of population dynamics as classical large grids except for parameters sensitive to an edge effect (eg density). By decreasing significantly the trapping effort, small grids will be of particular interest whenever the simultaneous operation of several trapping grids is needed (eg to compare different environmental conditions).
2

Dispersal in the bank vole

100%
Gliwicz J., Ims R. A.
Polish Journal of Ecology
|
2000
|
tom 48
|
nr Suppl.
3

Adrenocortical response to stress in rodents with different modes of life

100%
Moshkin M., Selyatitskaya V., Zhigulina E., Miroshnichenko V.
Polish Ecological Studies
|
1994
|
tom 20
|
nr 3-4
4

Understanding the dynamics of bank vole populations: demographic variability, stochasticity and density dependence

100%
Yoccoz N. G., Stenseth N. C.
Polish Journal of Ecology
|
2000
|
tom 48
|
nr Suppl.
5

A long-term study of the winter food niche of the pine marten Martes martes in northern boreal Finland

84%
Pulliainen E., Ollinmaki P.
Acta Theriologica
|
1996
|
tom 41
|
nr 4
The diet of the pine marten Martes martes (Linnaeus, 1758) was studied during 16 successive winters in an uninhabited area in northern boreal Finland. The results are based on 5677 scats analyzed. The present data support earlier findings that the pine marten is an opportunistic generalist, its most favoured food apparently being small rodents, especially Clethrionamys spp. The significant year-to-year variation in the frequency of occurrence of this favoured prey in the diet of the marten correlated positively with summer trapping numbers for these species. Snow cover decreased the martens' consumption of Microtus spp, but not Clethrionomys spp. or the wood lemming Myopus schisticolor. The first real alternative in the absence of small rodents appeared to be the red squirrel Sciurus vulgaris, and in its absence carcasses of reindeer Rangifer tarandus tarandus and eggs. Other food items included birds, the mountain hare Lepus tímidas, the common frog Rana temporaria, berries and mush­rooms. There was some evidence that the occurrence of red squirrels in the diet was dependent on the abundance of both squirrels and small rodents. We suggest that in northern boreal Finland martens primarily forage for small rodents, and larger prey, which is less available and more difficult to catch, is captured incidentally.
6

Analysis of dispersal in small mammal population

84%
Lukyanov O.
Polish Ecological Studies
|
1994
|
tom 20
|
nr 3-4
7

Evolution of bank voles [ Clethrionomys, Arvicolinae ] in the late Pliocene and early Pleistocene of eastern Europe

84%
Tesakov A.
Acta Zoologica Cracoviensia
|
1996
|
tom 39
|
nr 1
8

Prey selection of the least weasel Mustela nivalis in the laboratory

84%
Pekkarinen P., Heikkila J.
Acta Theriologica
|
1997
|
tom 42
|
nr 2
Prey individuals representing the bank vole Clethrionomys glareolus and the field vole Microtus agrestis were presented in pairs to male and female least weasels Mustela nivalis Linnaeus, 1766 in the laboratory. The voles were placed in two randomly selected boxes out of 8 boxes, which were connected to an arena housing the weasel. For each trial we recorded the finding, killing and eating order of the two prey individuals. Mate weasels tended to kill bank voles before field voles, and female weasels preferred to eat the bank vole first. Both sexes selected juvenile bank voles as the first prey to eat.
9

Density-dependent variation in body mass of voles

67%
Johannesen E., Andreassen H. P.
Acta Theriologica
|
2008
|
tom 53
|
nr 2
We studied inter-annual, spatial and sexual variation in the body mass of bank volesMyodes glareolus Schreber, 1780 and grey-sided volesMyodes rufocanus Sundevall, 1846 using live trappings from two grids on the southand north-facing slopes of a mountain valley in Southern Norway. Variation in spring density of the four populations was consistent with cyclic dynamics (n=7,s-values >0.5). Individuals caught on the south-facing slope were larger than those caught on the north-facing slope. Reproductively mature bank vole males were smaller than females, whereas reproductively mature grey-sided vole males were larger than females. Body mass was related to density in both species. In bank voles, we found a direct positive density dependence caused by a higher rate of survival at higher densities resulting from individual allocation of resources from reproduction to survival and growth. In grey-sided voles, we found a negative delayed density dependence resulting from grazing on preferred plants that determined the resource available for individual vole growth the following year.
10

Asymmetrical competition between the bank vole and the wood mouse, a removal experiment

67%
Fasola M., Canova L.
Acta Theriologica
|
2000
|
tom 45
|
nr 3
Experimental removal was conducted to test interspecific competition between the wood mouse Apodemus sylvaticus (Linnaeus, 1758) and the bank vole Clethrionomys glareolus (Schreber, 17801 that dominate the rodent communities in the forested biotopes through most of central Europe. Population density, body mass, reproductive condition, and habitat use were compared among two experimental sites (where one of the species had been removed) and one control site. The 5-year-studv included pre- -removal, removal, and post-removal periods. Reproductive condition was not affected by the density of the competitor or the conspecifics. Also, we did not detected any habitat shift that could be related to competitive release. However, the removal of wood mice strongly affected the population density of bank voles, but the removal of bank voles affected density of wood mice only slightly. Thus, we conclude that the competitive effect was asymmetrical.
11

Geographical differences in size, reproduction and behaviour of bank voles in relation to density variations

67%
Yoccoz N. G., Hansson L., Ims R. A.
Polish Journal of Ecology
|
2000
|
tom 48
|
nr Suppl.
12

Heteroxenous Coccidia [Apicomplexa: Sarcocystidae] in the populations of their final and intermediate hosts: European buzzard and small mammals

59%
Svobodova M., Vorisek P., Votypka J., Weidinger K.
Acta Protozoologica
|
2004
|
tom 43
|
nr 3
13

Niepozorni mieszkańcy

34%
Borowski Z.
Echa Leśne
|
2006
|
nr 07
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