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    Wyświetlanie 1-3 z 3
    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:
    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:
    Owady w pokarmie puszczyka (Strix aluco) na terenach leśnych w środkowej i północno-wschodniej Polsce
    Insects in the diet of the tawny owl (Strix aluco) in forest areas of central and north-eastern Poland
    Autorzy:
    Skłodowski, J.
    Gryz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/995758.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lasy
    sowy
    puszczyk
    Strix aluco
    sklad pokarmu
    wypluwki
    analiza skladu pokarmu
    owady
    wykaz gatunkow
    Puszcza Kampinoska
    Lasy Rogowskie
    Biebrzanski Park Narodowy
    tawny owl
    opportunistic predator
    pellets
    insects
    forest
    Opis:
    Studies on invertebrates in the diet of the tawny owl were carried out in Rogów, Kampinos and Białowieża forests as well as in the mosaic ecosystems of Biebrza wetlands. Invertebrates were identified on the basis of their remnants found in the pellets. The aim of the study was to answer the two questions: (1) does the tawny owl select its invertebrate prey or is it an opportunist predator, (2) is it possible to characterize places where the owl preys just on the basis of the invertebrate species composition in its diet. As a result we found out that indeed the tawny owl was an opportunist predator towards invertebrates, and also that the invertebrate species composition found in the pellets was a good indicator of the type of hunting habitat as it showed that the owl caught invertebrates in various sites, i.e. tree hollows, rotten trunks, soil litter or open area.
    Źródło:
    Sylwan; 2012, 156, 01; 36-46
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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