Wyniki wyszukiwania

1

Post-fledging survival of the Black-headed Gull [Larus ridibundus] depending on hatching parameters

100%

Viksne J., Janaus M.

The Ring

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1993

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tom 15

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nr 1-2

2

Plumage polymorphism and breeding parameters of various Feral Pigeon [Columbia livia Gm.] morphs in urban area [Gdansk, North Poland]

84%

Hetmanski T., Jarosiewicz A.

Polish Journal of Ecology

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2008

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tom 56

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nr 4

683-691

In 2007, the population of Feral Pigeons in Gdańsk City (almost 500,000 inhabitants) constituted 14 200 individuals. The population density in the built-up areas of Gdańsk (82.2 km²) was estimated at an average of 17.2 birds 10⁻¹ ha, however the highest density occurred in Gdańsk’s city centre area (5.7 km²) – 44 birds 10⁻¹ ha. Blue plumage type pigeons dominated in the population (93%), while black, red and albinotic types were rarely observed. Melanistic birds were more frequently found than blue-bar birds, whose plumage is inherited from the Rock Pigeon. However, blue-bars were more numerous in Gdańsk compared with other pigeon populations in central and northern Europe. Old pre-war buildings were not confirmed as influencing the plumage pattern of pigeons. Melanistic birds were more numerous in old district of Oliwa, whereas blue bars in old Gdańsk city centre. The plumage of pigeons in small flocks of up to 50 birds did not differ from that of pigeons in flocks of over 50 and 100 birds. Blue-bars, checkers and dark checkers did not differ in body mass or breeding parameters. Other causes of polymorphism variation among pigeons in a population are discussed.

3

Breeding parameters and recruitment in Feral Pigeons Columba livia f. domestica

84%

Hetmanski T., Barkowska M.

Acta Ornithologica

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2008

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tom 43

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nr 2

159-166

This research was conducted on the Feral Pigeon population in Słupsk (NW Poland). Breeding parameters and the number of parental pairs' young recruited into the breeding population were determined for 52-112 marked pairs over three breeding seasons. Pairs had an average of 4.4 broods and produced 3.6 fledglings per breeding season. From 39 to 49% of pairs in various seasons did not have any young recruited. Every fourth pair (25-30%) had a single young bird recruited, from 12 to 20% of pairs — two young, from 4 to 11% — 3 young, and 6% of pairs had from four to six young recruited. The number of recruits depended on the breeding parameters of the parents: it was lowest among young pairs (low quality birds), those that began breeding late in the season, had a short breeding season, or low breeding success. In contrast, high quality birds with a long breeding season, the highest reproductive parameters and breeding success, had the most young recruited. Survival rate of young after leaving the nest was not found to be influenced by the starting date or the length of the breeding season of pairs. However, nesting conditions, such as pair density in colonies, may influence the fate of young birds after they leave the nest and are recruited.

4

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Effect of recreational and therapeutic use of horse on chosen hematological parameters of half-bred saddle horse

84%

Bis-Wencel H., Saba L., Kowaleczko M.

Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica

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2009

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tom 27

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nr 2

19-24

5

Habitat structure and breeding parameters of the White Stork Ciconia ciconia in the Kolno Upland [NE Poland]

84%

Nowakowski J. J.

Acta Ornithologica

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2003

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tom 38

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nr 1

6

Effect of old nest material on nest site selection and breeding parameters in secondary hole nesters - a review

67%

Mazgajski T. D.

Acta Ornithologica

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2007

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tom 42

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nr 1

1-14

7

Breeding biology of the Great Grey Shrike [Lanius excubitor]: an analysis of nest record cards

67%

Olborska P., Kosicki J. Z.

Biological Letters

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2004

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tom 41

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nr 2

147-154

8

Breeding performance, apparent survival, nesting location and diet in a local population of the Tawny Owl Strix aluco in Central Lithuania over the long-term

67%

Grasyte G., Rumbutis S., Dagys M., Treinys R.

Acta Ornithologica

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2016

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tom 51

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nr 2

In the present study, we used 37-year long dataset on Tawny Owls from the annual monitoring of nestboxes at a sample plot in Central Lithuania. We expected that Tawny Owls responded to changes in land use practices, stemming from a change in both political and economic system, which may affect prey abundance and composition, breeding performance and demography. To analyze temporal changes in monitored parameters, we divided the study period into three phases (1978-1989,1990-2001 and 2002-2014), corresponding to different socio-economic conditions. The number of nesting pairs of Tawny Owls decreased significantly in the last 13 years of the study, but the number of successful pairs fluctuated without any trend. The clutch size and number of nestlings varied without significant trends, but nesting success improved over the last 13 years. Annual apparent survival probability of the female Tawny Owls did not vary significantly over the study period (model averaged values between 0.71 and 0.73). Owls occupied nestboxes irrespective to the distance from the agricultural land during the first two study periods, but since early 2000s, owls tended to occupy nestboxes located deeper in the forest. Birds and small mammals were similarly important as prey items by biomass. Since the 1990s, the share of Microtus voles significantly decreased in the diet, while that of birds increased. In summary, changes in the diet, improved nesting success of the Tawny Owl and tendency of nesting in forest interior may indicate ongoing complex responses to the changes in environmental conditions.

9

Multivariate GCA and SCA effects in an analysis of top-cross and line x tester progenies

67%

Kaczmarek Z., Adamski T., Surma M., Czajka S.

Seria Biologiczna. Uniwersytet im. Adama Mickiewicza w Poznaniu

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2005

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tom 72

Ograniczanie wyników

Post-fledging survival of the Black-headed Gull [Larus ridibundus] depending on hatching parameters

Plumage polymorphism and breeding parameters of various Feral Pigeon [Columbia livia Gm.] morphs in urban area [Gdansk, North Poland]

Breeding parameters and recruitment in Feral Pigeons Columba livia f. domestica

Effect of recreational and therapeutic use of horse on chosen hematological parameters of half-bred saddle horse

Habitat structure and breeding parameters of the White Stork Ciconia ciconia in the Kolno Upland [NE Poland]

Effect of old nest material on nest site selection and breeding parameters in secondary hole nesters - a review

Breeding biology of the Great Grey Shrike [Lanius excubitor]: an analysis of nest record cards

Breeding performance, apparent survival, nesting location and diet in a local population of the Tawny Owl Strix aluco in Central Lithuania over the long-term

Multivariate GCA and SCA effects in an analysis of top-cross and line x tester progenies