Bartosz Pirga

Bieszczadzki National Park, Poland · science

Bieszczady National Park and its buffer zone is an area of permanent living and breeding of wolves within family groups. In the years 2006–2020, four wolf packs were monitored in home ranges of 113–311 km2. A total area of 562–903 km2 was monitored. Basic population indicators (e.g. numbers, reproduction, distribution of home ranges) were obtained...

Winter is the period that brown bears Ursus arctos spend in dens which are shelters that provide cover and protection against external conditions. The research area covered the Bieszczady National Park (BdPN) area and in the immediate vicinity of its borders (49ON 22OE). In 2009–2018, 24 brown bear winter dens and 3 direct areas of denning, as well...

Proponuje się uznanie za rezerwat przyrody pod nazwą „Zakole Sanu", nazywany w dalszej części „Rezerwatem”. Dokonane badania inwentaryzacyjne oraz monitoringowe potwierdziły wybitną wartość przyrodniczą tego obiektu oraz ujawniły realne zagrożenia ze strony planowanej gospodarki leśnej. Stwierdzone zostały relikty lasów pierwotnych - gatunki porost...

The movement of animals within occupied habitats and long-distance migration are an extremely important ecological phenomena conditioning the stable functioning of the population. In the local scale migrations are responsible for effective use of individual territories and are the factor influencing spatial structure of the population. In the broad...

In Europe, brown bear Ursus arctos habitats frequently overlap with human settlements and infrastructure. We tested whether anthropogenic structures played an important role in habitat selection by brown bears in the Bieszczady Mountains, Poland. We analysed 668 signs of brown bear presence recorded during 6 counts along 246 km of transects (total...

Human disturbance is thought to be a major source of stress for animals but breeding status, social interactions and food availability are also potential sources. Long-lasting stress may adversely affect the fitness of animals and for that reason the evaluation of stressors is important for conservation of threatened species. The aim of our study w...

Wolf activity varies considerably among differentstudies that explained activity patterns by factors suchas human activity, breeding status or prey availability(Fancy and Ballard 1995; Vila` et al. 1995; Ciucci et al.1997; Theuerkauf et al. 2003; Kusak et al. 2005; Chavezand Gese 2006; Theuerkauf et al. 2007). However, it islikely that the high var...

We studied the activity and movements of a male and a female wolf during breeding in the Bieszczady Mountains, Poland. The female was less active and mobile and on average closer to the den than the male. The male was less active and mobile when the pack size was seven compared to a year when the pack consisted only of the breeding pair. We conclud...

until recently. The radio tracked wolves of three packs moved throughout the day with one major peak around dawn. Wolves avoided the area around main public roads more at night (up to a distance of 1.5 km) than in the day (up to 0.5 km). Wolves avoided a 0.5-km area around secondary public roads and paved forest roads both at night and in the day b...

Noninvasive samples are of increasing importance to study wild populations. In this study, we investigate the applicability of urine samples as the sole source of DNA for routine noninvasive genetic monitoring of wildlife using wolves (Canis lupus) as an example. Within the scope of a long-term wolf population survey, we collected during winter sno...