Wyniki wyszukiwania

1

Interesujace obserwacje obraczkowanych labedzi niemych [Cygnus olor] w Wielkopolskim Parku Narodowym

100%

Dolata P. T., Statuch T.

Morena

|

1996

|

tom 04

47-49

2

Dispersion dynamics of breeding mute swans [Cygnus olor Gmelin] in northwest Germany

100%

Scherner E. R.

Ekologia Polska

|

1992

|

tom 40

|

nr 4

589-603

3

Liczebnosc populacji legowej oraz preferencje srodowiskowe labedzia niemego Cygnus olor w Nadwarcianskim Parku Krajobrazowym

100%

Krupa A., Michalczyk A., Rucinski M.

Chrońmy Przyrodę Ojczystą

|

2000

|

tom 56

|

nr 1

124-129

4

Size does not matter – no evidence for assortative mating by body size in the Mute Swan Cygnus olor

100%

Wlodarczyk R., Minias P., Janiszewski T.

Polish Journal of Ecology

|

2016

|

tom 64

|

nr 2

Finding a mate of high quality is of key importance for reproducing birds, and thus positive assortative mating is commonly observed in avian populations. Although assortative mating by age, body size, condition or ornamental traits was reported for many bird taxa, there is a scarcity of empirical evidence for such mating patterns in wildfowl. We studied mating patterns in the Mute Swan Cygnus olor from the Central-European population. We analysed four body measurements (total wing length, forearm length, head length, foot web width) in 91 different breeding pairs. Contrary to our expectations, we found no evidence for assortative mating by any of the collected biometrical measurements and by overall structural size (PC1 from all measured skeletal traits). Further, Mute Swans mated randomly by the size of bill knob, which is considered a sexually selected ornament in this species. We suggest that in the species with long-term pair bonds and monogamous breeding system, such as the Mute Swan, the benefits from large size of mates may be less important for positive reproductive output than other individual traits, e.g., age or previous breeding experience.

5

Wstepne wyniki znakowania labedzi niemych Cygnus olor na Ziemi Lubuskiej

100%

Czechowski P.

Przegląd Przyrodniczy

|

2006

|

tom 17

|

nr 1-2

107-110

6

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The in vitro hemolytic activity of erythrocytes from free-living mute swan (Cygnus olor) spread out in Gdynia and Sopot Coasts

100%

Tkachenko H., Kurhaluk N., Hetmanski T.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

|

2018

|

tom 22

The erythrocytes could be considered as a valuable model in studying the cytotoxic effect of environmental xenobiotics owing to its particular structure and the important components of their plasma membrane especially lipids and proteins. The aim of our study was to investigate the erythrocyte hemolytic activity of mute swan (Cygnus olor) from Baltic coastal region in two points, i.e. Sopot and Gdynia. These comparisons will show whether mute swans on the Baltic coastal regions have elevated levels of hemolysis plus gender variation in erythrocyte damage. Forty adult mute swans were captured from Sopot and Gdynia in February 2013. Collected birds were measured and weighted, and the blood was sampled. The birds were divided into 4 groups (after the 2nd/3rd year of life): males from Sopot (n = 10), females birds from Sopot (n = 10), males from Gdynia (n = 10), and females from Gdynia (n = 10). Blood samples were collected from the medial metatarsal vein in sodium citrate for erythrocyte sedimentation rate. Blood was stored in tubes and held on the ice until centrifugation. The plasma was removed. The erythrocyte suspension (one volume) was washed with five volumes of saline solution three times. The acid resistance of erythrocytes was induced by 0.1M HCl, while osmotic resistance was induced by incubation erythrocyte suspension with the different solution of urea and NaCl, as well as in solutions of different NaCl concentration (0.1-0.9%). The erythrocyte hemolysis was measured spectrophotometrically. Our study revealed that the highest level of the hemolysis percentage was observed among females from Gdynia, males from Sopot, then females from Sopot, and males from Gdynia. The significant differences between the hemolysis percentage among females from Gdynia and Sopot from 13.5 to 18.0 min after HCl-induced hemolysis was observed. The results also indicated significant differences between the hemolysis percentage among males from Gdynia and Sopot from 14.0 to 19.0 min. Hemolysis percentage showed to be increased not significantly among males from Gdynia with time from hemolysis initiation to 10.0 min but close to linearity with a value of hemolysis percentage among males from Sopot after 25 min of hemolysis initiation. The maximal level of hemolysis percentage was significantly higher among females from Gdynia (at 15.0 min) compared to females from Sopot (at 14.0 min). The maximal level of hemolysis percentage among males from Gdynia and Sopot was noted at 0.5 min after hemolysis initiation. The maximal level of hemolysis percentage was 4.40% and 4.11%, respectively. The highest percentage of hemolyzed erythrocytes after incubation with solutions of various urea concentration was observed both among males and females from Gdynia. The lowest percentage of hemolyzed erythrocytes was exhibited by the erythrocyte suspension of males from Sopot. Comparing the percentage of hemolyzed erythrocytes both among males and females from Sopot, the higher values of hemolyzed erythrocytes was noted among females. The highest percentage of hemolyzed erythrocytes after incubation with solutions of various NaCl concentration was observed among males and females from Sopot and further among males and females from Gdynia after incubation with 0.5-0.9% NaCl solution. Comparing the percentage of hemolyzed erythrocytes after incubition with 0.1-0.4% NaCl solution, the highest percentage of hemolyzed erythrocytes was observed among males and females from Gdynia and then among males and females from Sopot. Our study showed more individual variation, probably related to the impact of the environmental habitat and consumption of ingested prey items by mute swans. Of those males and females, females from Gdynia showed the highest level of hemolyzed erythrocytes.

7

Agresja samca labedzia niemego Cygnus olor wobec wlasnego pisklecia odmiany polskiej [immutabilis]

84%

Dolata P. T., Kurzawski W.

Przegląd Przyrodniczy

|

1996

|

tom 07

|

nr 1

86-88

8

Drugi leg mieszany labedzia krzykliwego Cygnus cygnus i labedzia niemego Cygnus olor w Polsce

84%

Baldyga T., Wieloch M., Czyz S.

Notatki Ornitologiczne

|

2003

|

tom 44

|

nr 4

270-273

9

Przydatność zdjęć lotniczych do wykrywania stanowisk lęgowych łabędzia niemego Cygnus olor na przykładzie Gdańska

84%

Sikora A.

Ornis Polonica

|

2011

|

tom 52

|

nr 3

10

Liczebnosc i rozmieszczenie labedzia niemego Cygnus olor na Ziemi Lodzkiej

84%

Wlodarczyk R., Janiszewski T.

Notatki Ornitologiczne

|

2007

|

tom 48

|

nr 2

82-91

11

Liczebność i rozmieszczenie łabędzia niemego Cygnus olor na Obszarze Specjalnej Ochrony PLB200002 Puszcza Augustowska

84%

Zawadzki G., Zawadzka D., Soltys A., Zawadzki J.

Ornis Polonica

|

2019

|

tom 60

|

nr 1

12

Profil mikrobiologiczny i parazytologiczny zimującej populacji łabędzia niemego (Cygnus olor) z terenów Pomorza

84%

Wysocka-Lipińska N., Tkachenko H., Kurhaluk N.

Słupskie Prace Biologiczne

|

2015

|

nr 12

13

Analysis of spatial point pattern shows no desertion of breeding Mute Swan areas by the other waterbirds within fishpond

84%

Gayet G., Calenge C., Broyer J., Mesleard F., Vaux V., Fritz H., Guillemain M.

Acta Ornithologica

|

2016

|

tom 51

|

nr 2

Mute Swan Cygnus olor numbers have recently increased in a dramatic fashion in Western Europe and in North America, suggesting there could be potential consequences for the rest of the waterbird community. Breeding Mute Swan pairs may behave territorially towards other waterbirds, taking advantage of their larger size, and hence cause concern regarding their potential effects on waterbird communities. We studied how the within-site distributions of breeding Mute Swans and other waterbirds were related to each other, in order to assess if there is support to the assertion that breeding Mute Swans may affect the distribution of the other waterfowl within waterbodies. We mapped waterbird and swan distribution within fishponds during the Mute Swan breeding period. Relying on spatial point pattern analysis, our first finding is that breeding Mute Swans were located in the vicinity of the other waterbirds, using the same area within fishpond. Waterbirds do not completely desert the area used by breeding swan pairs within a waterbody, hence not supporting the claim that Mute Swans dislodge the other species. If an exclusion process by Mute Swan breeding pairs towards waterbirds exists, it is not strong enough to generate deserted areas by waterbirds around breeding Mute Swans. Our second finding is that breeding Mute Swans were not located where the density probability function for waterbird presence was the greatest within a fishpond, i.e. breeding Mute Swans were not located in the centre of groups formed by other waterbirds within each fishponds. This may indicate slightly different micro-habitat preferences or use within fishponds, or could indicate the potential occurrence of interactions. In conclusion, these results question whether the increasing Mute Swan populations actually directly threaten the other waterbird communities in such habitats, and require population control as is often claimed.

14

Polska odmiana immutabilis labedzia niemego Cygnus olor w okolicach Czestochowy

84%

Czyz S.

Notatki Ornitologiczne

|

1997

|

tom 38

|

nr 3

231-233

15

"Polskie" łabędzie nieme w Łagowskim Parku Krajobrazowym

84%

Jermaczek D.

Bociek. Biuletyn Klubu Przyrodników

|

2003

|

nr 1-2[73-74]

16

Activity patterns of the Mute Swans Cygnus olor wintering in rural and urban areas: a comparison

84%

Jozkowicz A., Gorska-Klek L.

Acta Ornithologica

|

1996

|

tom 31

|

nr 1

45-51

Time activity patterns of wintering Mute Swans were studied over three seasons in and near Cracov using the focal bird sampling method. In the city the swans were fed by people, while outside the city the birds were not fed by people. Rural Mute Swans spent 48.1% of the daytime eating, while urban swans fed only 4.6% and begged 8.7% of the time. Urban birds spent more time swimming and loafing (28.3 and 36.1%, respectively) than rural birds (10.2 and 18.4%). The daily activity pattern for rural swans was generally bimodal with early morning and late afternoon peaks in feeding, and a mid-day resting period. In contrast, the swans in Cracov did not show any cycle in diurnal feeding activity. There were differences in the frequencies of aggressive behaviour between urban and rural swans. In the city aggression occurred much more often. The behaviour of urban swans during the night was very similar to nocturnal activities of rural swans. The activity pattern of swans wintering in Cracov is probably mainly due to adaptations to the feeding by people.

17

Relation between winter, breeding and moulting grounds-general applicability of local field studies of Mute Swans [Cygnus olor] on the Swedish West-coast

84%

Mathiasson S.

The Ring

|

1993

|

tom 15

|

nr 1-2

18

Brzydkie kaczatka. Piskleta labedzi rosna bardzo powoli

83%

Wylegala P.

Salamandra:Magazyn Przyrodniczy

|

2003

|

nr 1

39

19

Zimowanie labedzia niemego Cygnus olor na miejskim odcinku Warty w Koninie

83%

Przybycin M.

Przegląd Przyrodniczy

|

2003

|

tom 14

|

nr 1-2

183-184

20

The epidemiological environment of avian influenza H5N1 outbreaks in wild birds in Croatia

67%

Muzinic J., Feare C. J., Pavlak M., Cvitkovic D., Tadic M.

Polish Journal of Environmental Studies

|

2010

|

tom 19

|

nr 2

379-385

Following the spread from its origins in China, Asian lineage highly pathogenic avian influenza H5N1 was first recorded in Europe in Turkish poultry and in poultry and wild birds in Romania in early October 2005. On 19 October 2005 Croatia became the second European country to record an outbreak in wild birds, involving Mute Swans Cygnus olor. Subsequent surveillance in Croatia revealed further instances of H5N1 in dead and sick Mute Swans in 2005, and in 2006 in more dead Mute Swans and in living, apparently healthy, Black-headed Gulls Larus ridibundus, but not in poultry. The observations presented here suggest that Croatia experienced two independent incursions of Asian lineage HPAI H5N1, but genetic confirmation is not available. Potential routes of introduction by wild birds, the poultry industry and fish-farming practices are discussed, but the evidence for all of these remains circumstantial

Ograniczanie wyników

Interesujace obserwacje obraczkowanych labedzi niemych [Cygnus olor] w Wielkopolskim Parku Narodowym

Dispersion dynamics of breeding mute swans [Cygnus olor Gmelin] in northwest Germany

Liczebnosc populacji legowej oraz preferencje srodowiskowe labedzia niemego Cygnus olor w Nadwarcianskim Parku Krajobrazowym

Size does not matter – no evidence for assortative mating by body size in the Mute Swan Cygnus olor

Wstepne wyniki znakowania labedzi niemych Cygnus olor na Ziemi Lubuskiej

The in vitro hemolytic activity of erythrocytes from free-living mute swan (Cygnus olor) spread out in Gdynia and Sopot Coasts

Agresja samca labedzia niemego Cygnus olor wobec wlasnego pisklecia odmiany polskiej [immutabilis]

Drugi leg mieszany labedzia krzykliwego Cygnus cygnus i labedzia niemego Cygnus olor w Polsce

Przydatność zdjęć lotniczych do wykrywania stanowisk lęgowych łabędzia niemego Cygnus olor na przykładzie Gdańska

Liczebnosc i rozmieszczenie labedzia niemego Cygnus olor na Ziemi Lodzkiej

Liczebność i rozmieszczenie łabędzia niemego Cygnus olor na Obszarze Specjalnej Ochrony PLB200002 Puszcza Augustowska

Profil mikrobiologiczny i parazytologiczny zimującej populacji łabędzia niemego (Cygnus olor) z terenów Pomorza

Analysis of spatial point pattern shows no desertion of breeding Mute Swan areas by the other waterbirds within fishpond

Polska odmiana immutabilis labedzia niemego Cygnus olor w okolicach Czestochowy

"Polskie" łabędzie nieme w Łagowskim Parku Krajobrazowym

Activity patterns of the Mute Swans Cygnus olor wintering in rural and urban areas: a comparison

Relation between winter, breeding and moulting grounds-general applicability of local field studies of Mute Swans [Cygnus olor] on the Swedish West-coast

Brzydkie kaczatka. Piskleta labedzi rosna bardzo powoli

Zimowanie labedzia niemego Cygnus olor na miejskim odcinku Warty w Koninie

The epidemiological environment of avian influenza H5N1 outbreaks in wild birds in Croatia