Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

2 Acta Theriologica

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: cub number

Sortuj według:

Ogranicz wyniki do:

Changes in the density and spatial distribution of red fox dens and cub numbers in central Poland following rabies vaccination

100%

Goszczynski J. , Misiorowska M. , Juszko S.

Acta Theriologica

2008

tom 53

nr 2

Increases in red foxVulpes vulpes (Linnaeus, 1758) numbers and densities have been found in all European countries involved in the rabies vaccination program. In Poland, the number of foxes has increased steadily since the 1990s. Between 1999–2000, the average density of foxes reached 1.3–2 ind./km2 in some parts of the country. The aim of the study was to estimate the change in fox population densities in central Poland during 1980–2006, and to assess the effect these changes have had on the spatial distribution of natal dens, mean numbers of cubs observed at occupied dens and the sedentary/nomadic fox ratio. Estimations of fox population density and numbers were based on three methods: (1) counts of tracks in snow, (2) locations of natal dens and counts of cubs, and (3) the battue (driving) method. The three methods of assessment were used continuously in our study area over a period of 25 years. Average yearly results were analysed and comparisons made between the periods before and after implementation of the anti-rabies vaccination. The results obtained with all three methods show a significant increase in the fox population, when the two analysed periods are compared. Increases in fox population densities correlated with increased numbers of breeding sites being located outside forests, from only single ones in the 1980s to 24% of the total in 2005. The average number of cubs per occupied den decreased significantly (by 11%) in comparison with before the anti-rabies vaccination period. The great increase (more than 100%) in fox numbers observed using the battue (driving) method suggest, that nomadic animals can form an important part of winter population in our study area.

Fox, raccoon dog and badger densities in North Eastern Poland

100%

Goszczynski J.

Acta Theriologica

1999

tom 44

nr 4

The densities of three sympatric carnivore species (fox, raccoon dog and badger) were estimated in Suwałki Landscape Park (North Eastern Poland}. The number of predator den was estimated by a double survey of the area; additionally, snow tracking was carried out. Mean spring density (1995-1996) of foxes was estimated on 0.27 individuals per square km of the whole Park territory whereas those of badgers and raccoon dogs were 0.36 and 0.37, respectively. These values are much higher than estimations by the Park Authorities. In comparison with other regions of Poland the densities of both raccoon dogs and badgers were among the highest recorded. Mean number of cubs per family den was 2.3 in badgers, 6.0 in foxes and 5.7 in raccoon dogs.