Manual of beaver management within the ... - DANUBEPARKS
Manual of beaver management within the ... - DANUBEPARKS
Manual of beaver management within the ... - DANUBEPARKS
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<strong>Manual</strong> <strong>of</strong> <strong>beaver</strong> <strong>management</strong> <strong>within</strong> <strong>the</strong> Danube river basinFig. No. 7.: Scheme <strong>of</strong> a <strong>beaver</strong> pro<strong>of</strong> fencing with trenched fence(Nitsche 2003).Protection <strong>of</strong> individual teesValuable trees can be protected with wire meshes <strong>of</strong> at least 1 m height or by sandbased substances (e.g. WÖBRA) that keep <strong>beaver</strong>s from gnawing. For straight shaftedtrees, screed grids have proven <strong>the</strong>ir usefulness, especially because <strong>of</strong> <strong>the</strong>ir opticaladvantages. As an alternative, 2 to 3 layers <strong>of</strong> 4-edge-meshes can be used. Thinnermaterial (“chicken wire”) is <strong>of</strong>ten ripped by <strong>beaver</strong>s and not recommended.Supplemental feedingSupplemental food (e.g. cut shrubs) can reduce <strong>beaver</strong> chopping activity. Thismeasure should only be used in special cases (e.g. <strong>beaver</strong>s in settlements) as <strong>the</strong>additional feeding eventually influences <strong>the</strong> natural regulation mechanisms.Planting <strong>of</strong> woody foodThe planting <strong>of</strong> shrubby willows can provide alternative food for <strong>the</strong> <strong>beaver</strong> near <strong>the</strong>water and <strong>the</strong>reby lower damage to more distant valuable trees.61
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