Population size and nesting peculiarities of the black-headed gull Chroicocephalus ridibundus (Linnaeus, 1766) on the territory of water treatment facilities
Background. Today, the black-headed gull inhabits man-made areas of wastewater treatment facilities (WTF) to comensate for the the reduction of natural aquatic and wetland habitats. Over the last decade, a nearly tenfold increase in its population has been recorded, despite a low reproduction rate....
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Львівський національний університет імені Івана Франка
2024
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ftdoajarticles:oai:doaj.org/article:9f75b64e7bb54bec91abf2ae53bee1fc 2024-09-15T18:37:44+00:00 Population size and nesting peculiarities of the black-headed gull Chroicocephalus ridibundus (Linnaeus, 1766) on the territory of water treatment facilities Yulia Mamedova Angela Chaplygina 2024-06-01T00:00:00Z https://doi.org/10.30970/sbi.1802.770 https://doaj.org/article/9f75b64e7bb54bec91abf2ae53bee1fc EN UK eng ukr Львівський національний університет імені Івана Франка http://publications.lnu.edu.ua/journals/index.php/biology/article/view/4562 https://doaj.org/toc/1996-4536 https://doaj.org/toc/2311-0783 doi:10.30970/sbi.1802.770 1996-4536 2311-0783 https://doaj.org/article/9f75b64e7bb54bec91abf2ae53bee1fc Біологічні студії, Vol 18, Iss 2, Pp 201-218 (2024) wastewater treatment facilities black-headed gull population size nesting biology aviafauna Biology (General) QH301-705.5 article 2024 ftdoajarticles https://doi.org/10.30970/sbi.1802.770 2024-08-05T17:49:12Z Background. Today, the black-headed gull inhabits man-made areas of wastewater treatment facilities (WTF) to comensate for the the reduction of natural aquatic and wetland habitats. Over the last decade, a nearly tenfold increase in its population has been recorded, despite a low reproduction rate. This fact indicates the lack of stability in the bird population, necessitating thorough research. Materials and Methods. The analysis of the population size and biological characteristics of black-headed gulls involved censuses and observations at the WTF of the city of Kharkiv using conventional methods during the spring-summer periods of 2020–2021 and 2023. Results. The population of the black-headed gull reached its peak in the third decade of May 2020 (2637 individuals) and 2023 (2124 individuals), as well as in the second decade of May 2021 (3949 individuals). The maximum nesting density was observed on sludge sites (SS) of wastewater treatment facilities that are most similar to natural habitats, where dried mud alternates with water patches and vegetation at the bottom and around the perimeter (Type V): 236.7±26.7 pairs/ha in 2020 and 242.9±28.5 pairs/ha in 2021. The majority of nests were found in the first decade of May 2021 and the third decade of May 2020. The black-headed gull forms mixed-species, occasionally monospecific subcolonies. Nesting in association with it were: Sterna hirundo, Anas platyrhynchos, Spatula clypeata, Vanellus vanellus, Charadrius dubius, Himantopus himantopus, Fulica atra, Gallinula chloropus, and Aythya ferina. The size of the complete black-headed gull clutch was 3.1±0.4 eggs (n = 190). The egg dimensions were 50.9±2.1 ´ 36.2±1.1, with a mass of 34.6±2.8 g. Regarding shell coloration, five types of background colors were identified. Mass egg laying occurred from the third decade of April to the first decade of May, constituting 40.3 % (n = 993) in 2020 and 62.3 % (n = 1757) in 2021. The egg-laying period extended from April to July, with the latest non-incubated clutches ... Article in Journal/Newspaper Sterna hirundo Vanellus vanellus Black-headed Gull Chroicocephalus ridibundus Directory of Open Access Journals: DOAJ Articles Studia Biologica 18 2 201 218 |
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op_collection_id |
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English Ukrainian |
topic |
wastewater treatment facilities black-headed gull population size nesting biology aviafauna Biology (General) QH301-705.5 |
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wastewater treatment facilities black-headed gull population size nesting biology aviafauna Biology (General) QH301-705.5 Yulia Mamedova Angela Chaplygina Population size and nesting peculiarities of the black-headed gull Chroicocephalus ridibundus (Linnaeus, 1766) on the territory of water treatment facilities |
topic_facet |
wastewater treatment facilities black-headed gull population size nesting biology aviafauna Biology (General) QH301-705.5 |
description |
Background. Today, the black-headed gull inhabits man-made areas of wastewater treatment facilities (WTF) to comensate for the the reduction of natural aquatic and wetland habitats. Over the last decade, a nearly tenfold increase in its population has been recorded, despite a low reproduction rate. This fact indicates the lack of stability in the bird population, necessitating thorough research. Materials and Methods. The analysis of the population size and biological characteristics of black-headed gulls involved censuses and observations at the WTF of the city of Kharkiv using conventional methods during the spring-summer periods of 2020–2021 and 2023. Results. The population of the black-headed gull reached its peak in the third decade of May 2020 (2637 individuals) and 2023 (2124 individuals), as well as in the second decade of May 2021 (3949 individuals). The maximum nesting density was observed on sludge sites (SS) of wastewater treatment facilities that are most similar to natural habitats, where dried mud alternates with water patches and vegetation at the bottom and around the perimeter (Type V): 236.7±26.7 pairs/ha in 2020 and 242.9±28.5 pairs/ha in 2021. The majority of nests were found in the first decade of May 2021 and the third decade of May 2020. The black-headed gull forms mixed-species, occasionally monospecific subcolonies. Nesting in association with it were: Sterna hirundo, Anas platyrhynchos, Spatula clypeata, Vanellus vanellus, Charadrius dubius, Himantopus himantopus, Fulica atra, Gallinula chloropus, and Aythya ferina. The size of the complete black-headed gull clutch was 3.1±0.4 eggs (n = 190). The egg dimensions were 50.9±2.1 ´ 36.2±1.1, with a mass of 34.6±2.8 g. Regarding shell coloration, five types of background colors were identified. Mass egg laying occurred from the third decade of April to the first decade of May, constituting 40.3 % (n = 993) in 2020 and 62.3 % (n = 1757) in 2021. The egg-laying period extended from April to July, with the latest non-incubated clutches ... |
format |
Article in Journal/Newspaper |
author |
Yulia Mamedova Angela Chaplygina |
author_facet |
Yulia Mamedova Angela Chaplygina |
author_sort |
Yulia Mamedova |
title |
Population size and nesting peculiarities of the black-headed gull Chroicocephalus ridibundus (Linnaeus, 1766) on the territory of water treatment facilities |
title_short |
Population size and nesting peculiarities of the black-headed gull Chroicocephalus ridibundus (Linnaeus, 1766) on the territory of water treatment facilities |
title_full |
Population size and nesting peculiarities of the black-headed gull Chroicocephalus ridibundus (Linnaeus, 1766) on the territory of water treatment facilities |
title_fullStr |
Population size and nesting peculiarities of the black-headed gull Chroicocephalus ridibundus (Linnaeus, 1766) on the territory of water treatment facilities |
title_full_unstemmed |
Population size and nesting peculiarities of the black-headed gull Chroicocephalus ridibundus (Linnaeus, 1766) on the territory of water treatment facilities |
title_sort |
population size and nesting peculiarities of the black-headed gull chroicocephalus ridibundus (linnaeus, 1766) on the territory of water treatment facilities |
publisher |
Львівський національний університет імені Івана Франка |
publishDate |
2024 |
url |
https://doi.org/10.30970/sbi.1802.770 https://doaj.org/article/9f75b64e7bb54bec91abf2ae53bee1fc |
genre |
Sterna hirundo Vanellus vanellus Black-headed Gull Chroicocephalus ridibundus |
genre_facet |
Sterna hirundo Vanellus vanellus Black-headed Gull Chroicocephalus ridibundus |
op_source |
Біологічні студії, Vol 18, Iss 2, Pp 201-218 (2024) |
op_relation |
http://publications.lnu.edu.ua/journals/index.php/biology/article/view/4562 https://doaj.org/toc/1996-4536 https://doaj.org/toc/2311-0783 doi:10.30970/sbi.1802.770 1996-4536 2311-0783 https://doaj.org/article/9f75b64e7bb54bec91abf2ae53bee1fc |
op_doi |
https://doi.org/10.30970/sbi.1802.770 |
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Studia Biologica |
container_volume |
18 |
container_issue |
2 |
container_start_page |
201 |
op_container_end_page |
218 |
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1810482100470546432 |