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Wyszukujesz frazę "Hromada, Martin" wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Habitat selection in the great grey shirke
Breeding habitat selection in the great grey shirke Lanius excubitor - the importance of meadows and spring crops
Acta Ornithologica, vol. 34, no. 1
Wybiórczość siedliskowa srokosza Lanius excubitor w sezonie lęgowym: znaczenie łąk i zbóż jarych
Autorzy:
Antczak, Marcin
Tryjanowski, Piotr
Hromada, Martin (1969– )
Współwytwórcy:
Polska Akademia Nauk. Muzeum i Instytut Zoologii
Wydawca:
Muzeum i Instytut Zoologii PAN
Powiązania:
Acta Ornithologica
Opis:
S. [59]-63 : il. ; 27 cm
Streszcz. pol. Nazwy taksonów także w jęz. łac.
Habitat composition of breeding territories, habitat use during foraging, and nest-site selection of the Great Grey Shrike Lanius excubitor were examined in western Poland during years 1998-1999. Meadows and spring crops occurred within territories more frequently than expected by their availability. Habitat utilisation during foraging was significantly non-random and shrikes appeared to prefer low vegetation. All of 27 nests were located along tree lines and edges of small woodlots (maximum 7 m), and neither deciduous nor coniferous trees were preferred (78% and 22%, respectively). Preferred habitats of Great Grey Shrikes are relatively uncommon in modern agricultural landscape. Lack of suitable habitats in intensively used farmland may be the most important reasons for shrike population decline over Europe. Wielkopolska region offers good breeding habitats and this species has more dense and stable population over here, than in other parts of Europe.
Abstract in Polish. Taxa in Latin
Bibliogr. s. 62
P. [59]-63 : ill. ; 27 cm
Bibliogr. p. 62
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
Tytuł:
Great grey shrike biology
Biologia rozrodu srokosza w zachodniej Polsce
Acta Ornithologica, vol. 39, no. 1
Breeding biology of the great grey shrike Lanius excubitor in W Poland
Autorzy:
Hromada Martin
Polska Akademia Nauk. Muzeum i Instytut Zoologii
Antczak, Marcin
Tryjanowski Piotr
Grzybek Jerzy
Współwytwórcy:
Museum and Institute of Zoology, Polish Academy of Sciences
Wydawca:
Museum & Institute of Zoology
Powiązania:
Acta Ornithologica
Opis:
Streszcz. pol. Nazwy taksonów także w jęz. łac.
Bibliogr. s. 13-14
Bibliogr. p. 13-14
Abstract. pol.
A Great Grey Shrike population was studied in two large plots (220 km2 and 176 km2) in western Poland in 1999 - 2003. During the study period densities varied from 11.4 to 14.1 breeding pairs/100 km2 but numbers were stable. In all, 180 Great Grey Shrike nests were found - 114 (63.3%) in conifers, 66 (36.7%) in deciduous trees. This population’s reproductive parameters were relatively high in comparison to those of other European populations: mean clutch size - 6.6, hatching success - 92.5%, mean brood size - 5.72, mean number of fledglings per pair - 4.1, mean number of fledged young per successful pair - 5.25. Eggs (mean 27.1 x 19.9 mm) were found to be larger than reported in the literature. Nesting success was similar in both study plots, but there was slight seasonal variability: 52.6% - 41.0% from 99 nesting attempts in the first plot, 43.7% - 42.1% from 37 nests in the second. Predation was the main cause of nest losses. Plastic string used as nesting material appeared to be the most important cause of partial failures: 13 (8.2%) of a total of 147 nestlings surviving to fledging perished as a result of becoming tangled up in it. Nestlings rarely starved. Nests in linear habitats suffered significantly higher breeding losses (78.6%, N = 28) than those in non-linear habitats (50%, N = 90). The high fitness values obtained from this population were probably due to traditional farming practices, the sparing use of pesticides and the good potential food base.
p. [9]-14 : ill. ; 27 cm
S. [9]-14 : il. ; 27 cm
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
    Wyświetlanie 1-3 z 3

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