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    Wyświetlanie 1-3 z 3
    Tytuł:
    Wpływ struktury lasu na liczebność i wielkość terytorium lelka
    Effect of the forest structure on the number and territory size of nightjar Caprimulgus europaeus
    Autorzy:
    Stasiak, K.
    Grzywaczewski, G.
    Gustaw, W.
    Cios, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/991563.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Nadlesnictwo Pulawy
    struktura drzewostanu
    lasy
    ptaki
    lelek
    Caprimulgus europaeus
    liczebnosc
    terytoria legowe
    wielkosc terytorium
    zageszczenie populacji
    preferencje siedliskowe
    caprimulgus europaeus
    territory size
    density
    forest structure
    Opis:
    We analysed 7 territories of the nightjar located in the Puławy Forest District (eastern Poland). Density of the breeding population on the studied area was 0.88 territory/km². The smallest territory covered 4.5 ha, while the biggest one – 18.7 ha (average 13 ha). Birds were found in a loose birch and pine forest, in the plantation and nearby the working railway. Significant differences in open area contribution and in share of undergrowth and brushwood were found between analysed territories and random patches. Greater biodiversity was found in places chosen by birds.
    Źródło:
    Sylwan; 2013, 157, 04; 306-312
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use biochemical markers to evaluate the quality of fresh and cryopreserved semen from the arctic fox (Vulpes lagopus)
    Autorzy:
    Stasiak, K.
    Glogowski, J.
    Demianowicz, W.
    Kowalski, R.
    Nowak-Tkaczyk, A.
    Janicki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/30654.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The aim of this study was to use biochemical markers to evaluate the quality of fresh and cryopreserved semen from the arctic fox (Vulpes lagopus). Twenty-three manually collected ejaculates were analysed for the main indicators of semen quality (sperm concentration and ejaculate volume). Sperm motility and percentage of morphologically normal and abnormal spermatozoa were determined according to the stage of cryopreservation (fresh - measurement A; equilibrated - measurement B; frozen/thawed - measurement C). Furthermore, the seminal plasma and supernatants were analysed after equilibration and freeze/thawing for the activity of the enzymes alkaline phosphatase (ALP), acid phosphatase (AcP), lactate dehydrogenase (LDH) and aspartate aminotransferase (AspAT), and for the activity of acrosin inhibitors (AP). The mean concentration of sperm was 625.1 million/cm3, and ejaculate volume averaged 1.6 cm3. Seminal plasma was characterized by the highest activity of alkaline phosphatase (3.43×103 U/l) and lowest activity of acrosin inhibitors (4.55×103 U/l). After equilibration, the supernatants showed the highest activity of acid phosphatase (94.9 U/l) and after freeze-thawing, they showed a high activity of lactate dehydrogenase (535.8 U/l) and aspartate aminotransferase (577.1 U/l), which indicates that these proteins had leaked from spermatozoa into the extracellular medium during the biotechnique of semen cryopreservation. In addition, several significant relationships were found between some indicators of semen quality and plasma and/or supernatant enzyme activity.
    Źródło:
    Polish Journal of Veterinary Sciences; 2014, 17, 3
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena możliwości włączenia Lasów Sobiborskich do sieci obszarów Important Birds Areas oraz obszarów specjalnej ochrony ptaków
    Possibility of inclusion of the Sobibór Forests into Importand Birds Areas and Special Protection Areas networks
    Autorzy:
    Kanclerska, K.
    Karpińska, O.
    Woźniak, B.
    Grzębkowski, M.
    Aftyka, S.
    Belcik, M.
    Bożycki, L.
    Celej, M.
    Chodkiewicz, T.
    Kuszner, M.
    Litwiniak, K.
    Pawelec, M.
    Pietrasz, K.
    Rożycki, A.L.
    Sikora, D.
    Smith, L.
    Stasiak, K.
    Szewczuk, W.
    Sliwiński, S.
    Tylkowski, S.
    Woźniak, M.
    Woźniak, P.
    Wójciak, J.
    Żołądek, K.
    Keller, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/985820.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    ochrona przyrody
    Lasy Sobiborskie
    walory przyrodnicze
    fauna
    ptaki
    ochrona zwierzat
    Europejska Siec Ekologiczna Natura 2000
    obszary specjalnej ochrony ptakow
    bird protection areas
    nature 2000 network
    Opis:
    One of the greatest challenges of nature conservation is to identify and locate networks of protected areas, which will preserve the biodiversity. The paper aims to show the ornithological value of the Sobibór Forests (E Poland) and to emphasize the fact that the network of Important Bird Areas (IBA) and Special Protection Areas within Natura 2000 (SPA) may require additions. The study was conducted in the period of 2008−2016, mainly on forested areas occupying 256 km2. The Sobibór Forests are characterized by a large diversity of habitats, but are mainly covered by Scots pine Pinus sylvestris. High diversity of wetlands and marshlands make the Sobibór Forest unique within the country. Three methodologies were used to estimate population size of chosen species: sampling, census and random observations. 31 species from Annex I of the Birds Directive plus 25 species of SPEC or non−SPECE category were observed which allows to consider this area as one of the most valuable for avifauna in Poland. Six breeding species classify the Sobibór Forests as the IBA and SPA. These species include Black Stork Ciconia nigra (8−13 breeding pairs), Common Crane Grus grus (80−120 breeding pairs), Grey Great Owl Strix nebulosa (0−7 breeding pairs i.e. 50−100% of Polish breeding population), Eagle Owl Bubo bubo (6 breeding pairs), White−backed Woodpecker Dendrocopos leucotos (40−70 breeding pairs) and Grey−headed Woodpecker Picus canus (20−40 breeding pairs). Six other species show potential for qualification, but not enough data has been collected yet. The list of this specie includes: Short−toed Snake Eagle Circaetus gallicus, Common Snipe Gallinago gallinago, Stock Dove Columba oenas, European Nightjar Caprimulgus europaeus, Collared Flycatcher Ficedula albicollis and Bluethroat Luscinia svecica. The Sobibór Forests occupy a small area compared to other IBA forests. However, the number of breeding species classifies the surveyed area as 7th among other IBAs. Moreover all eligible species may be considered as a bioindicators of the natural state of the forest. This is proof of the high natural value of this area.
    Źródło:
    Sylwan; 2018, 162, 02; 146-154
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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