Entity

Time filter

Source Type


Wajdzik M.,University Rolniczy w Krakowie | Konieczny G.,Nadlesnictwo Jedrzejow | Nasiadka P.,Samodzielny Zaklad Zoologii Lesnej i Lowiectwa | Szyjka K.,University Rolniczy w Krakowie | Skubis J.,Wroclaw University of Environmental and Life Sciences
Sylwan | Year: 2016

The aim of the study was to verify the hypothesis that the quality of male roe deer hunted In the Kielce region depends on the selected characteristics of the place of their earlier habitat (forest cover, soil) and the age of the individuals. As a criteria to verify that hypothesis we chose carcass weight, weight and height of the antlers and skull dimensions. Material consisted of carcasses and antlers of 1349 bucks harvested in 169 hunting districts in the Kielce region (central Poland). We found that the individual quality of male roe deer was diverse. Significant impact was found for the forest cover, diversity of soil types and age of the individuals. Roe deer with the smallest carcass weight, having significantly lighter antlers occurred in areas with the forest cover of over 40% (tab. 1). In turn, in the filed-type circuits, where the forest cover does not exceed 20%, bucks were much heavier and imposed massive antlers (fig. 1). There was also evidence that in areas where the fertile soil dominated (rendzina and chernozems) individual quality of deer was significantly better than in districts where poor fawn and rust soils predominated (fig. 2). The examined environmental factors had the greatest impact on carcass or antlers weight, as well as the dimensions of deer skulls in case of the youngest bucks and their impact decreased with age. Optimum of the individual's development in terms of carcass weight and antler falls at the age of seven. Bucks harvested in the Kielce region, in comparison to the other populations in Poland, were characterized by good individual quality and slightly subsided only to individuals from the Lublin Upland (tab. 2). Source


The aim of the study was to characterize the diet composition of tawny owl in relation to environmental variables: season and availability of small rodents. Study area was located in central Poland, in Łódź voivodship, in the area of Rogów Forest District. It comprised of a mosaic of forests and arable lands. The study was done in the years 2003-2010. Pellets were collected at least twice a year in 18 tawny owl territories. Material collected between April and September was categorised as coming from spring-summer, while this from October-March period as autumn-winter season. Simultaneously, in the years 2004-2007, changes in the number of small rodents were monitored by live-trapping. Standard procedures of pellet analyses were used to identify 1926 prey items. Generally, diet composition was dominated by small rodents. Yet, their share was significantly higher in autumn-winter season (71.3 vs. 57.3%). Among rodents, yellow-necked mice, common voles and bank voles were caught most often. Soricomorphs accounted for 3% of prey items in both seasons on average. Birds formed approximately 15% of prey items and their share was comparable in warm and cold half year. On the other hand, in a warmer period owls preyed on invertebrates more often (23.0 vs. 7.5%). A breadth niche was wider in a warm (D=4.01) half year than in cold one (D=3.36). When a peak of rodent number was recorded, owls preyed on bank voles twice as often as compared to other years (increase from 6.4 to 11% of prey items), while an increase in the consumption of yellow-necked mouse was lower (from 27.5 to 34.2%). Tawny owls preferred yellow-necked mice and bank voles were avoided. This study showed that in the Rogów Forest tawny owl is an opportunistic predator. However, composition of its diet does not absolutely reflect the structure of assemblage of small mammals as certain species are preferred. Source


Ludwisiak L.,Samodzielna Pracownia Dendrometrii i Nauki o Produkcyjnosci Lasu | Nasiadka P.,Samodzielny Zaklad Zoologii Lesnej i Lowiectwa
Sylwan | Year: 2014

The paper presents the selected indicators of hare populations in Poland. The material consisted of 528 hares acquired during traditional hunts. For each hunted hare we specified its weight, sex and age. All individuals were classified into two age groups: the first comprised juveniles (up to 12 months of age), while the other-adults (over 12 months). The ratio of young individuals in relation adults vaties a lot (26-56%). The males to females ratio was approximately 1:1 with a slight advantage in favor of females. Reproductive rate was between 0.36 and 1.26, while reproductive success-0.7-2.7. Average weight of hunted hares ranged between 3.42 and 4.32 kg. No significant differences in body weight were noticed within gender groups (Z=1.298, p>0.05, Mann-Whitney U test). However, they were found within the age groups (Z=-9.657, p>0.05, Mann-Whitney U test). Source


The research analyses the use of space by the Wild boar living in a human-transformed landscape. CMR method was used. Animals were caught in two complexes from February 2009 to May 2010. Fifty boars were captured. Information on the location and hunting time were collected. Results show small range of activity of investigated Wild boars. Animals were shot within 4 km from the trapping place. The longest distance that Wild boar had passed amounted to over 20 km. Most boars survived up to 50 days from the date of their catch. The maximum survival time was 373 days. Small dispersion of Wild boars is probably caused by philopatry, sufficient food resources and shelter, and the ability to adapt to human presence near the refuges. Source


Wajdzik M.,University Rolniczy akowie | Witek K.,Nadlesnictwa Bardo laskie | Nasiadka P.,Samodzielny Zaklad Zoologii Lesnej i Lowiectwa | Skubis J.,Wroclaw University of Environmental and Life Sciences
Sylwan | Year: 2014

The aim of the study was to characterize individual quality of mouflon harvested in the Bardzkie Mountains (south-west Poland). The assessment criteria included horn dimensions, i.e. their length, circumference (base, middle and top), spread and twist. These features were individually analyzed for each mouflon ram. Medal value of the trophies expressed as GIG scores increased with the ram age reaching 187.12 for 6-years-old animals. Three out of 50 measured trophies were classified into the bronze medal category, as they crossed the threshold of 185 CIC points. All medal-winning individuals were 6 years old. Source

Discover hidden collaborations