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The natural seasonal changes in the food choice and digestive tract of wild ruminants
Kamler, Jiří ; Homolka, Miloslav
Herbivore populations all over Europe have been strongly influenced by human activities. A combination of harvest, changes in forest structure, supplementary feeding, predator extirpation and others factors have led in most cases to increases of their populations and a severe impact on the composition and structure of the forest vegetation. The food choice of free living ungulate species is strongly influenced by season and animal species and changes in diet composition and quality cause the changes in the digestive tract. Effective management of ungulate populations and forest ecosystems should be based not only on detailed information about the impact of deer browsing and the number of deer to harvest but also on the density of deer species, the food supply, the structure of diets consumed by individual species, attraction and quality of the individual components of food supply the total quality of food taken and seasonal changes in digestive tract.
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Evaluating production and quality losses from game damage in spring barley
Dvořák, J. ; Cerkal, R. ; Kamler, Jiří ; Šejnohová, H.
During a field trial in locality Žabčice in the year 2004 the effect of different damages of plants on yield and quality of the barley variety Amulet was detected by the method Latin square. Plants were damaged in three intensities (not damaged, damaged 25% and damaged 50%). From result is evident the decline of both economic production and production of front corn in the case, that was damaged 50% of the leaf area of the plants in the beginning of stem extension stage (by 6,7% or 6,6% in comparison to non damaged area), but better ratio of corn to straw was found out (0,93). The stress of the plants induced by the damage did not caused neither any significant changes in the content of selected chemical component in the corn, nor decline of the content extractive matter in the malt.
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