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    Tytuł:
    Dynamika liczebności populacji lisa na terenie Puszczy Białowieskiej w latach 1981-2016
    Dynamics of red fox population in Bialowieza Primeval Forest in the years 1981-2016
    Autorzy:
    Gryz, J.
    Krauze-Gryz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/987194.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lowiectwo
    zwierzeta lowne
    lisy
    Puszcza Bialowieska
    lis pospolity
    Vulpes vulpes
    populacje zwierzat
    dynamika populacji
    liczebnosc populacji
    dynamika liczebnosci
    Nadlesnictwo Bialowieza
    Nadlesnictwo Browsk
    Nadlesnictwo Hajnowka
    Bialowieski Park Narodowy
    lata 1981-2016
    vulpes vulpes
    north−east poland
    snow tracking
    national park
    Opis:
    Abundance of red fox (Vulpes vulpes) populations in Poland and Europe have increased in the past decades, especially in the areas of high anthropogenic transformation. The aim of this study was to assess the current density of red fox in natural forests and to analyse changes in its abundance since 1981. The fieldwork was carried out in Polish part of the Bialowieża Primeval Forest (BPF), including Białowieża, Browsk and Hajnówka forest districts as well as Białowieża National Park. A standard method of snow tracking along transect routes (15 to 94 km long in the subsequent winters, altogether 199 km) was used. Taking a density of snow tracks per 1 km of a transect route per 24 h and the length of daily movements of red foxes (13,8 km) we calculated the population density. Results were compared with historical data derived with the same method. Mean number of tracks of red fox in the years 2011−2016 equaled 6.1/km/24h (SD=3.9). Density of fox population was 0.69 individuals/km2, which results in the abundance of the population in the whole area of BPF of 414 individuals in winter time, while of approximately 869 individuals in spring. Comparison of current data with the results from last three decades showed an increasing trend in the population of the analysed species. Nevertheless, in comparison to central or western Poland the density of the red fox in the BPF is still relatively low. Possible factors that suppress this population are parasites, infections (mange, rabies) and large carnivores.
    Źródło:
    Sylwan; 2017, 161, 04; 328-333
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ pory roku i dostępności gryzoni leśnych na skład pokarmu puszczyka Strix aluco w warunkach mozaiki polno-leśnej środkowej Polski
    Influence of season and availability of forest rodents on diet composition of tawny owl Strix aluco inhabiting field-forest mosaic in central Poland
    Autorzy:
    Gryz, J.
    Krauze-Gryz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/989671.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    ornitologia
    sowy
    puszczyk
    Strix aluco
    sklad pokarmu
    gryzonie
    analiza skladu pokarmu
    mozaika srodowisk polno-lesnych
    dostepnosc pokarmu
    pory roku
    wybiorczosc pokarmowa
    pellets
    rodents trapping
    functional response
    season
    prey selectivity
    Opis:
    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.
    Źródło:
    Sylwan; 2016, 160, 01; 57-63
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura płci i przyrost populacji jelenia Cervus elaphus w Puszczy Białowieskiej – porównanie dwóch metod oceny
    Sex structure and growth of Cervus elaphus population in the Bialowieza Forest – comparison of two assessment methods
    Autorzy:
    Gryz, J.
    Krauze-Gryz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/985923.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lowiectwo
    Puszcza Bialowieska
    zwierzeta lowne
    jelen europejski
    Cervus elaphus
    populacje zwierzat
    struktura populacji
    struktura plciowa
    wielkosc populacji
    metody badan
    obserwacje caloroczne
    fotopulapki
    trail cameras
    camera trapping
    all−year−round observations
    game management
    Opis:
    Data on sex structure and growth of the population is crucial for proper game management. Camera traps, which are of reasonably low cost, but very efficient, can potentially measure the aforementioned parameters. The paper objectives was to assess the share of bucks, does and calves in red deer Cervus elaphus population in the area of the Białowieża Forest. Two methods were used: camera traps and a traditional method of all−year−round observations. The study was conducted in the years 2011−2015 in three forest districts and the Białowieża National Park. Reconyx trail cameras were exposed in one location for approximately 30 days, then moved to a new place. Altogether, trail cameras were exposed in 761 spots, at least 500 m apart one from another. Analyses were based on material collected between June 1st to September 31st when sex and age identification were the most reliable and hunting season had yet not started. Additionally, all−year−round observations of animals were done by foresters and scientists in the whole forest area, species, sex and age were noted in the special forms. The number of observers was similar to that of exposed trail cameras. Sex and age structure of red deer population changed between years, but according to both methods does were more numerous than bucks. According to trail cameras, share of bucks was on average 42 vs. 32% (data for all years combined), and a population growth was 39−60 calves/100 does, depending on a year. According to all−year−round observation, share of bucks was 26%, of does 53% and there were 37 calves/100 does. The dominance of does over bucks is difficult to explain as the sex structure at birth is 1:1. The does are more susceptible to predation and are culled more often. As data from trail cameras showed lower disproportion, we may assume that those results were more reliable. Trail cameras can collect data all the time, regardless the season, time of a day and weather conditions. Pictures can be analysed in details and observations verified if necessary. Their biggest disadvantage is price (especially when we assume that all−year−round observations can be done as a part of work duties by forest service), and risk of theft or damage.
    Źródło:
    Sylwan; 2018, 162, 11; 965-968
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Występowanie sów Strigiformes na terenie Leśnego Zakładu Doświadczalnego SGGW w Rogowie (środkowa Polska)
    Occurrence of owls Strigiformes in the area of Forest Experimental Station of WULS-SGGW in Rogow (central Poland)
    Autorzy:
    Gryz, J.
    Krauze-Gryz, D.
    Goszczyński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/993276.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    LZD Rogow
    lasy
    fauna
    ptaki
    sowy
    Strigiformes
    puszczyk
    sowa uszata
    pojdzka
    plomykowka
    sowa blotna
    wystepowanie
    Opis:
    Presence of four owl species was confirmed in the area of Forest Experimental Station of WULS−SGGW in Rogów (central Poland) at the beginning of the 2000s. These were tawny owl, long−eared owl, little owl and barn owl. In the second half of the XX century migratory short−eared owls had also been recorded. Density of tawny owl territories per total area was 2.6/10 km².. For long−eared owl it was lower (1.5/10 km².). Little owls and barn owls were very rare and both species have probably decreased severely in the last several years. Despite fluctuations in the abundance of forest rodents, number of tawny owl pairs was reasonably stable throughout study time. In the case of long−eared owl its numbers varied between years.
    Źródło:
    Sylwan; 2013, 157, 09; 695-702
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urządzenia akustyczne UOZ-1 sposobem na ograniczenie kolizji z udziałem zwierząt na liniach kolejowych
    Sonic deterring devices UOZ-1 as a tool to limit collisions with animals along the railways
    Autorzy:
    Jasińska, K.
    Werka, J.
    Krauze-Gryz, D.
    Wasilewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/990028.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    zwierzeta dziko zyjace
    wedrowki zwierzat
    linie kolejowe
    zagrozenia zwierzat
    kolizje z pociagami
    odstraszanie zwierzat
    odstraszacze akustyczne
    urzadzenie UOZ-1
    skutecznosc
    railways
    natural sounds
    density of tracks
    animals mortality
    Opis:
    Modernization of railways in Poland should ensure not only safety of passengers, but also limit their negative impact on the environment, especially possibility of train collisions with animals. The aim of the study conducted in the years 2007−2013 on the E20 railway Mińsk Mazowiecki−Siedlce were (1) to record places where animals cross the railway most often, both on the stretches secured and unsecured with sonic deterring devices (UOZ−1), and (2) to specify the number and locations of collisions of trains with mammals. Winter tracking along the railways identified 12 mammal species that crossed the railways. These included four ungulates (moose, red deer, roe deer, wild boar) and eight smaller mammals (red fox, marten, domestic dog, domestic cat, polecat, stoat, brown hare, red squirrel). The average number of tracks of all mammals was higher on the stretches with UOZ−1 than on the stretches over 100 meters away from UOZ−1 (1.52 and 1.01/100 m, respectively, p<0.0001). For ungulates it was higher on the stretches with UOZ−1 (0.66 and 0.38/100 m respectively, p<0.0005) as well. During the study 26 cases of animals kills as result of collisions with trains were recorded: 9 mooses, 2 red deer, 7 roe deer, 15 wild boars, 1 fox, 1 stone marten, 4 dogs. Most of these collisions took place out of the range of UOZ−1.
    Źródło:
    Sylwan; 2014, 158, 02; 143-150
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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