scholarly journals Population dynamics of the White Stork Ciconia ciconia in Slovenia between 1999 and 2010

Acrocephalus ◽  
2010 ◽  
Vol 31 (145-146) ◽  
pp. 101-114 ◽  
Author(s):  
Damijan Denac
Keyword(s):  
Population Dynamics ◽  
Breeding Success ◽  
Weather Conditions ◽  
Breeding Population ◽  
White Stork ◽  
Breeding Period ◽  
Ciconia Ciconia ◽  
White Storks ◽  
Breeding Grounds ◽  
Unfavourable Weather

Population dynamics of the White StorkCiconia ciconiain Slovenia between 1999 and 2010Between 1999 and 2010, an annual census of the White StorkCiconia ciconiabreeding population was carried out in Slovenia using standardised methods. The Stork's population was concentrated in the NE and SE parts of Slovenia. In the 1999-2010 period, the breeding range of its population in Slovenia expanded in NW direction (the Savska ravan region), in SW direction (the Notranjsko podolje and Pivško podolje regions), but the species also colonized a part between Central and SE Slovenia (Dolenjsko podolje). Between 193 and 240 pairs were breeding during the study period, 209 pairs on average (HPa). The largest number of breeding pairs was recorded in 2004, the smallest in 2005. During the study period, breeding pairs (HPa) occupied 350 discrete nests in total. Average number of breeding pairs that raised juveniles (HPm) was 161. The highest fecundity was recorded in 2004, when 534 juveniles (JZG) fledged, the lowest in 2006, with only 219 fledged juveniles. On average, 414 juveniles fledged per year. The breeding pairs' (JZa) average breeding success in these 12 years was 2.02, the highest in 2000 (2.41), the lowest in 2006 (1.09). Average breeding success for the successful breeding pairs (JZm) was 2.57. The highest was in 2007 (2.94), the lowest in 2006 (2.07). The largest number of breeding pairs in 2004 and 2008 can be explained by the favourable fecundity in the population in 2000 and 2004, as juveniles become sexually mature at the age of 3-5 years, and at that age they generally return to the breeding grounds for the first time. The lowest number of breeding pairs and poor breeding success in 2005 and 2006 was caused by late arrival of White Storks to the breeding grounds and by unfavourable weather conditions during the breeding period. The pattern of nests placement did not change generally during the last 12 years. The largest proportion of nests was positioned on various kinds of poles (81%) and on chimneys (18%). In total, 27 area surveyors and 239 assistants helped in census realisation.

scholarly journals Insects in the White Stork Ciconia ciconia diet as indicators of its feeding conditions: the first diet study in Slovenia

Acrocephalus ◽  
2009 ◽  
Vol 30 (140) ◽  
pp. 25-29 ◽  
Author(s):  
Al Vrezec
Keyword(s):  
Breeding Success ◽  
Preliminary Test ◽  
White Stork ◽  
Ciconia Ciconia ◽  
Habitat Analysis ◽  
White Storks ◽  
Diet Study ◽  
Carrion Beetles ◽  
Bird Foraging

Insects in the White StorkCiconia ciconiadiet as indicators of its feeding conditions: the first diet study in SloveniaPrey remains found in the pellets of the White StorkCiconia ciconiaare known not to reveal the actual prey intake by the White Storks. The exceptions are the chitinous remains of insects that are quite well preserved in the pellets, and thus potentially good indicators of the actual intake of White Storks. Since insects are selected by White Storks in proportion to their abundance in the environment, they can be used as indicators of the quality of the bird foraging habitat. A preliminary test of this was carried out at three nests in NE Slovenia differing in their breeding success in 1997. In contrast to habitat analysis around the nest the proportions of Orthoptera and Coleoptera in the pellets corresponded well to the breeding success. Orthoptera species were dominant in high success, and Coleoptera (especially Carrion beetles Silphidae) in low success nests. In this paper the value of insects in White Stork pellets as indicators of the quality of the bird foraging microhabitat patches is set out. However, the indicative power of these insects needs to be tested further.

scholarly journals Changes in the number of nesting pairs and breeding success of theWhite Stork Ciconia ciconia in a large city and a neighbouring rural area in South-West Poland

2017 ◽  
Vol 25 (2) ◽  
pp. 109-115 ◽  
Author(s):  
Grzegorz Kopij
Keyword(s):  
Large City ◽  
Breeding Population ◽  
White Stork ◽  
City Hall ◽  
South West ◽  
Odra River ◽  
White Storks ◽  
Education And Awareness ◽  
The Mean ◽  
The City

Abstract During the years 1994–2009, the number of White Stork pairs breeding in the city of Wrocław (293 km2) fluctuated between 5 pairs in 1999 and 19 pairs 2004. Most nests were clumped in two sites in the Odra river valley. Two nests were located only cca. 1 km from the city hall. The fluctuations in numbers can be linked to the availability of feeding grounds and weather. In years when grass was mowed in the Odra valley, the number of White Storks was higher than in years when the grass was left unattended. Overall, the mean number of fledglings per successful pair during the years 1995–2009 was slightly higher in the rural than in the urban area. Contrary to expectation, the mean number of fledglings per successful pair was the highest in the year of highest population density. In two rural counties adjacent to Wrocław, the number of breeding pairs was similar to that in the city in 1994/95 (15 vs. 13 pairs). However, in 2004 the number of breeding pairs in the city almost doubled compared to that in the neighboring counties (10 vs. 19 pairs). After a sharp decline between 2004 and 2008, populations in both areas were similar in 2009 (5 vs. 4 pairs), but much lower than in 1994–1995. Wrocław is probably the only large city (>100,000 people) in Poland, where the White Stork has developed a sizeable, although fluctuating, breeding population. One of the most powerful role the city-nesting White Storks may play is their ability to engage directly citizens with nature and facilitate in that way environmental education and awareness.

Relationship between arrival date, hatching date and breeding success of the white stork (Ciconia ciconia) in Slovakia

Biologia ◽  
2009 ◽  
Vol 64 (2) ◽  
Author(s):  
Miroslav Fulin ◽  
Leszek Jerzak ◽  
Tim Sparks ◽  
Piotr Tryjanowski
Keyword(s):  
Breeding Success ◽  
White Stork ◽  
Hatching Date ◽  
Ciconia Ciconia ◽  
Arrival Dates ◽  
Spring Arrival ◽  
First Arrival ◽  
Long Term Trends ◽  
Migrant Birds

AbstractChanges in the spring arrival dates of migrant birds have been reported from a range of locations and many authors have focused on long-term trends and their relationship to temperature and other climatic events. Perhaps more importantly, changed arrival dates may have consequences for the breeding dates of birds which strongly influence breeding success. In this paper we take the opportunity provided by a monitoring scheme of the white stork (Ciconia ciconia) to examine several features of the timing of arrival and breeding in relation to chick production in Slovakia during the period 1978–2002. First arrival dates ranged from 5th March to 30th April, and hatching dates varied between 26th April and 8th July. Generally, early arriving pairs started breeding earlier and a shorter interval between the arrival of the first partner and breeding, expressed here as hatching date, resulted in higher breeding success.

scholarly journals Long-Term Changes and Breeding Success in Relation to Nesting Structures used by the White Stork,Ciconia ciconia

2009 ◽  
Vol 46 (1) ◽  
pp. 34-38 ◽  
Author(s):  
Piotr Tryjanowski ◽  
Jakub Z. Kosicki ◽  
Stanisław Kuźniak ◽  
Tim H. Sparks
Keyword(s):  
Breeding Success ◽  
White Stork ◽  
Ciconia Ciconia ◽  
Long Term Changes

scholarly journals DATA ON WHITE STORK NESTS (Ciconia ciconia Linnaeus, 1758) FROM SEVERAL VILLAGES IN ARGEȘ COUNTY AND OLT COUNTY

2021 ◽  
Vol 10 (20) ◽  
pp. 186-191
Author(s):  
Maria Denisa Conete
Keyword(s):  
Local Level ◽  
National Level ◽  
Population Trends ◽  
White Stork ◽  
Anthropogenic Pressure ◽  
The South ◽  
Ciconia Ciconia ◽  
White Storks ◽  
Study Population

In this paper is presented the situation of the White Stork breeding from several villages in the Argeş County and Olt County, in 2021. The data were collected during the White Stork Census in Romania, coordinated at the national level by the Romanian Ornithological Society (SOR) and Milvus Group. We checked the presence of nests in the 7 localities in Argeș County and Olt County using the car and the GPS track. The data is used to calculate numbers and study population trends of the species in Romania. An analysis was performed on several indicators (uH, HPo, HPm, Hpa, H, JZG) that characterize the reproduction, as well as other facts about the distribution. The results were compared with those from the previous White Stork census in Argeş County, in 2004 and 2014. Although the population of the White Storks from Argeş County shows a slight increase in this localities, the anthropogenic pressure is strong, in addition the dry climate, from the south of Arges County, strongly affects, at local level, the population of the White Storks.

Factors Influencing The Breeding Success of White Storks Ciconia ciconia in Eastern Romania

Ardeola ◽  
2018 ◽  
Vol 65 (2) ◽  
pp. 271 ◽  
Author(s):  
Lucian Fasolă-Mătăsaru ◽  
Emanuel Ştefan Baltag ◽  
Pavel Ichim ◽  
Dumitru Cojocaru
Keyword(s):  
Breeding Success ◽  
Ciconia Ciconia ◽  
Factors Influencing ◽  
White Storks

scholarly journals Results of national White Stork (Ciconia ciconia) census in Hungary in 2019

2020 ◽  
Vol 28 (1) ◽  
pp. 1-10
Author(s):  
Péter Lovászi ◽  
Károly Nagy ◽  
Zoltán Görögh
Keyword(s):  
Breeding Season ◽  
Breeding Success ◽  
National Park ◽  
Census Data ◽  
Population Decline ◽  
Success For All ◽  
White Stork ◽  
Nest Material ◽  
Ciconia Ciconia ◽  
Rainy Weather

AbstractA national White Stork (Ciconia ciconia) census was organised in Hungary in 2019. The 14th country-wide nest count was coordinated by MME/BirdLife Hungary, also involving local branches and volunteers of the society and national park directorates.Altogether 5,018 nests and 2,358 White Stork nest holders without nest material were reported. 89.2% of occupied nests were built on electric poles. Although 80 years ago every third nests were found on trees, in 2019, only 6 were reported at that location. Successful pairs raised 2.62 nestlings on average, breeding success for all breeding pairs was 2.19, which is lower than typical, probably due to chilly and rainy weather during the breeding season. Based on 3,540 reported breeding pairs and former census data, the White Stork population of Hungary is estimated to be 3,860–4,020 pairs in 2019. The size of the population was ca. 15–16 thousand pairs in 1941, which halved by 1958 and decreased to 5 thousand pairs by the late 1960s. For four decades, the population fluctuated between 4,800 and 5,500 pairs but in the last twenty years, the number of breeding pairs slightly decreased in the country. The population decline is stronger in hilly areas of W Hungary, i.e. in Somogy, Vas and Zala counties is about 60%.

Arrival date, age and breeding success in white stork Ciconia ciconia

2007 ◽  
Vol 38 (5) ◽  
pp. 573-579 ◽  
Author(s):  
Pablo Vergara ◽  
José I. Aguirre ◽  
Manuel Fernández-Cruz
Keyword(s):  
Breeding Success ◽  
White Stork ◽  
Arrival Date ◽  
Ciconia Ciconia
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