Ábrahám Levente: Biomonitoring a Dráva folyó magyarországi szakasza mentén 2000-2004 - Natura Somogyiensis 7. (Kaposvár, 2005)

Heltai, Miklós, Szemethy, László, Szabó, László - Szőcs, Emese: Small and medium sized predators monitoring along River Dráva - Kis- és közepesméretű ragadozó emlősök monitoringja a Dráva mentén

HELTAI M., SZEMETHY L., SZABÓ L., SZŐCS Е.: PREDATOR MONITORING 163 Results The predator species which probably appear on the area According to data on the national mammal predator species' nationwide spreading and stock alteration published in the last decade the following summary can be given in the case of one or other species related to the Hungarian reach of river Dráva so to the research area: - Red fox (Vulpes vulpes): native, has an increasing stock, is a common species that appears everywhere along river Dráva; - Raccoon dog {Nyctereutes procyonoides): settler, non indigenous, has a spreading stock, it's presence along river Dráva can't be precluded; - Raccoon (Procyon lotor): settler, non indigenous, has a spreading stock, it's presence along river Dráva can't be precluded; - Golden jackal (Canis aureus): returned, native, it's listed in the Red Book (RAKONCZAY 1989), has an increasing and spreading stock, it's presence along river Dráva is certain; - Stone marten (Martes foina): native, common, has an increasing stock and spreading territory, but is a species that avoids closed forest areas, it also settled in the villages along the river, it's presence along river Dráva is certain; - Common polecat (Mustela putorius): native, common, has a stable stock, but is a specie that avoids closed forest areas, it's presence along river Dráva is certain; - Wolf (Canis lupus): returned, native, it's listed in the Red Book (RAKONCZAY 1989), the population is changeable, it's presence along river Dráva can be precluded in the past 15 years; - Lynx (Lynx lynx): returned, native, it's listed in the Red Book (RAKONCZAY 1989), the population is changeable, it's presence along river Dráva can be precluded; - Wild cat (Felis silvestris): native, it's listed in the Red Book (RAKONCZAY 1989), has a decreasing stock and spreading territory, it's presence along river Dráva is certain; - Ermine (Mustela ermined): native, has a stable stock, it's presence along river Dráva is possible; - Steppe polecat (Mustela eversmanni): native, probably has an increasing stock, likes the dry, open grass-grown areas, it's presence along river Dráva is not possible; - Pine marten (Martes martes): native, has an increasing stock and spreading territory, it's presence along river Dráva is certain; - Otter (Lutra Intra): native, it's listed in in the Red Book (RAKONCZAY 1989), has a stable stock and spreading area, it's presence along river Dráva is certain; - Badger (Mêles meles): native, common, has an increasing stock and spreading area, it's presence along river Dráva is certain; - Weasel (Mustela nivalis): native, common, has a stable stock stabil, avoids closed forests, it's presence along river Dráva is certain. The results of the trapping There were 26 848 trap nights altogether between 2001 and 2004, during this period we captured 86 individuals of seven predator species (red fox, weasel, marten, beech marten, common polecat, wild cat, cat). The average capture effectiveness counted for the whole period was 0.32 (n=4, SD=0.0819). The obvious presence of other two species the ermine and the otter was proved by footprints and excrements with observations apart from the trapping.