Prof. Dr. W. Bäumler

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Acorns and other kind of seeds were treated with various plant extracts and chemical compounds to reduce the losses caused by the Yellow-necked Field Mouse (Apodemus flavicollis) and the Redbacked Vole (Clethrionomys glareolus). The losses of treated and untreated acorns were tested in the lab and in an outdoor enclosure. Furthermore the influence of the(More)
The fluctuating populations of the field vole (Microtus agrestis), the bank vole (Clethrionomys glareolus) and the yellow-necked field mouse (Apodemus flavicollis) were observed in the years from 1980 through 1985 in wooded areas in Bavaria. Every spring and autumn rodents were trapped with snap traps in test plots, then frozen and dissected in the lab. In(More)
About 150,000 nest boxes were examined in the years 1985 and 1986 in 160 forest districts. Additionally the record books about nestbox contents were checked in 35 districts (200,000 hectares) for the last 2–3 decades. The distribution of bats and dormice was mapped out according to the available data. The absolute number and the percentage of nestboxes(More)
The effects of odors from the Field Vole upon the behaviour of conspecific individuals and sympatric mice and voles were tested with traps in forest cultivations. Three virgin subadult females (o.estr.), four adult females in post-partum-cycle (p.p.c) and three fertile males of the Field Vole served as donors of odors. Each donor vole was kept in a single(More)
Live traps, contaminated by secretions from either males or females of the wood mouse (Apodemus sylvaticus) and untreated were set in triplets at trapping points in a forest garden near Munich from June until October 1986. Eighty-four rodents were trapped, 47 were red-backed voles. Significantly more rodents (38) were caught in the traps scented with male(More)
The occurrence ofJynx torquilla, Certhia familiaris, C. brachydactyla, Phoenicurus phoenicurus, Ficedula hypoleuca andSitta europaea in the eastern parts of Bavaria was investigated according to records of contents in nesting boxes from 1950–1990. The number of boxes checked each year rose from 560 in the year 1950 up to 13000 in 1985 (Abb. 2). The(More)
Some rodent species of the family Arvicolidae especially the Field Vole (Microtus agrestis), the Bank Vole (Clethrionomys glareolus) and the Water Vole (Arvicola terrestris) can cause severe damage in broadleaved and mixed forest cultivations. Up to now the losses can be diminished only by reduction of vole density during wintertime. The use of rodenticides(More)
The density of the Common Vole (Microtus agrestis), the Redbacked Vole (Clethrionomys glareolus), and the two most commonApodemus species i. e. the Yellownecked Field Mouse (A. flavicollis) and the Longtailed Field Mouse (A. sylvaticus) was investigated in the decale 1980–1990 in several forest cultivations in Bavaria. The trapping results of all these(More)
The vegetation in forest cultivations is an important factor for the occurrence of harmful voles which can gnaw the roots and the bark of the young trees. The influence of weed control upon the density of rodents was observed during ten years in several tree plantations in Bavaria. In 27 mowed cultivations the number of harmful voles was reduced by about(More)