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1

Prey selection in Blue Tits Parus caeruleus as a response to food levels

100%
Grieco F.
Acta Ornithologica
|
1999
|
tom 34
|
nr 2
199-203
Some models of central place foraging relate the time taken to deliver a prey to the selectivity of the forager. If birds have to travel longer, they are expected to take only larger prey. Prey selectivity may also increase if birds have more time available for search activities. I tested this last hypothesis by experimentally increasing the food available to Blue Tits during young rearing. Insect larvae were offered to breeding adults from egg hatching to fledging of the young. Provisioning rates and prey size were studied by videotaping. In experimentally overfed broods, part of the additional food was delivered to their nestlings by the adults, while the rate of feeding with natural prey decreased compared to unmanipulated pairs. Overfed males delivered larger insect larvae than control males, while females showed no response to the treatment. Overfed males could deliver larger prey at late chick ages (when presumably the chicks' demand is higher) than controls, suggesting that control males were time- (tor energy) constrained. Moreover, overfed parents appeared to choose relatively more prey that may be important in the chicks' diet. The results show that prey selectivity is related to time (or energy) budgets.
2

Sikorki

84%
Gasiorowski S.
Hodowla i Chów Bydła. Czasopismo Polskiej Federacji Hodowców i Producentów Mleka
|
2012
|
nr 09
3

Selection on laying date in the Blue Tit Prus caeruleus and the Great Tit Parus major caused by weather conditions

84%
Zajac T.
Acta Ornithologica
|
1995
|
tom 30
|
nr 2
145-151
Three days of heavy rain (15.7, 37.9, 30.7 mm) and low temperature (min. temp. 5.7°C) during the breeding season 1991 caused high brood mortality in the Great Tit (GT) and the Blue Tit (ВТ), depending on brood advancement — in both species broods which died were older. In GT the mean advancement of dying broods was 5.29 days since hatching, while that of surviving ones 0.54 (P = 0.0005). In ВТ the advancement of broods which died was 7.82 and that of broods which survived —1.71 (P = 0.0004). The mortality was higher in ВТ than in GT, the former started breeding 4 days earlier on average (mean time of 1st egg laying in ВТ was 8.09 days, for GT was 11.96 days (P<0.0006). The calculated standardized selection differentials show very strong selection on the timing of breeding both in GT (iGT = 0.366, P = 0.042) and ВТ (iBT = 1.059, P = 0.0003). The higher absolute energy demands of older broods in view of limited food resources and vulnerability of young to hypothermia seem to be proximate cause of the mortality in both species. The selection resulted in almost the unification of the time of breeding in both species. The strength of this selection implies that weather could be one of the most important factors determining the timing of breeding.
4

Smierc partnerki powodem zmiany skladu pokarmu przynoszonego do gniazda przez owdowialego samca modraszki [Parus caeruleus]

84%
Banbura J., Blondel J., Wilde-Lambrechts H., Galan M. J., Maistre M.
Notatki Ornitologiczne
|
1995
|
tom 36
|
nr 1-2
173-176
5

Sikora bogatka, modraszka i czarnogłówka

84%
Binkiewicz K., Binkiewicz B.
Poznajmy Las
|
2011
|
nr 1
6

Rozpoznawanie sikory lazurowej Cyanistes cyanus i modraszki C. caeruleus

67%
Cofta T.
Ptaki Polski
|
2015
|
nr 2[38]
7

Location of bird nests in vertical metal pipes in suburban built-up area of Warsaw

67%
Lesinski G.
Acta Ornithologica
|
2000
|
tom 35
|
nr 2
211-214
8

Socjalna obrona gniazda Passer ssp. i Parrus ssp. przed tchórzem zwyczajnym (Mustela putorius L.)

67%
Indykiewicz P.
Przegląd Zoologiczny
|
1988
|
tom 32
|
nr 2
9

Gniazda - plecione, usypane, wykopane

67%
Hordowski J.
Ptaki. Biuletyn Ogólnopolskiego Towarzystwa Ochrony Ptaków
|
2012
|
nr 1
10

Male i pozyteczne.cz.IV

67%
Koziarowski K.
Działkowiec
|
1994
|
nr 09
42
11

Kochajmy sikory

59%
Dzwonkowski R. J.
Ekopartner
|
2000
|
nr 02
16-17
12
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Gniazdowanie modraszki Cyanistes caeruleus w gniezdzie oknowki Delichon urbicum

59%
Radziszewski M.
Kulon
|
2008
|
tom 13
110-111
13

O bogatych i ubogich

59%
Wylegala P.
Salamandra:Magazyn Przyrodniczy
|
2006
|
nr 1-2
2-7
14

Sikory, sikorki, sikoreczki

59%
Okolow G.
Echa Leśne
|
2012
|
nr 4
15
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Wpływ hałasu drogowego na ptaki leśne - eksperyment z wykorzystaniem budek lęgowych

51%
Wiacek J., Kucharczyk M., Polak M., Kucharczyk H.
Sylwan
|
2014
|
tom 158
|
nr 08
We investigated whether high−intensity road traffic affects the nestbox occupancy pattern of secondary hole−nesting birds. Field studies were carried out in two forests in south−eastern Poland (Lasy Janowskie forest and Polichna forest). Both complexes were included in NATURA 2000 network. In our knowledge it was first field experiment on road−traffic noise influence on forest birds, conducted in the Polish environmental conditions. The results of this experiment can be used in work on the impact of road projects on forest birds. Nestboxes were hung at twelve linear transects located perpendicularly to the busy road and they were regularly inspected in 2011−2012. Road noise was measured by use of a digital measurer of sound level at each nestbox. Monitoring the activity of predators on the study area was done with the help of digital trail cameras and experiment with use of artificial nest with eggs. Noise level decreased with distance from the road. In the first year of experiment we observed that the birds settled preferentially habitats in the vicinity of road. However in next season the number of occupied nestboxes was independent from the distance from road. We found that the pressure caused by predators on the study area was very low, creating safer nesting places for birds. Our results provide evidence that these birds are well adapted to cope with anthropogenic noise. Some species of birds preferred nesting in neighbourhood of road.
16

One nie boja sie zimy...

43%
Krzywanska E.
Przyroda Polska
|
2003
|
nr 01
22-24
17

Skrzydlaci goscie

42%
Stachon W.
Działkowiec
|
1996
|
nr 10
42
18

Dwie kuzynki

42%
Karetta M.
Poznajmy Las
|
2008
|
nr 5
6-7
19

Padlinożercy

34%
Okolow G.
Echa Leśne
|
2010
|
nr 02
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