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Výskyt, početnost a ohrožení ježků Erinaceus europaeus a Erinaceus roumanicus ve městě České Budějovice s využitím termovizní technologie
 STANKOVÁ, Alena
This work is focused on studying the presence and population density of hedgehogs as well as threats to their population in given locations in České Budějovice. The research took place in two city parks far from the city centre, three parks close to the city centre and three housing estates. A spotter has been periodically observing their surroundings using infrared binoculars while walking along a given path. Observation was done once a month, from June to October, on each location. There were no hedgehogs found in the parks near the city centre. The hedgehog abundance differed between the parks far from the city centre and housing estates - the abundance in parks reaching up to 83 hedgehogs km-2 and the abundance in housing estates being 30-50 hedgehogs km-2. No wounded nor dead hedgehogs have been noticed. The effective spotting distance of infrared binoculars was 100 m in parks and 60 meters in housing estates. Vegetation height and density was major factor in the effectivity of the infrared binoculars when used for spotting small animals.
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