Area use and important areas for Common Tern Sterna hirundo inland populations breeding in Slovenia and Croatia
Abstract During the breeding periods of 2018 and 2019 we investigated the extent of areas Common Terns Sterna hirundo use while searching for food. We used GPS-UHF tags to follow the movements of 23 terns from Slovenia (7 individuals) and Croatia (16 individuals). We investigated the movements of bi...
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crdegruyter:10.1515/acro-2019-0003 2024-09-15T18:02:46+00:00 Area use and important areas for Common Tern Sterna hirundo inland populations breeding in Slovenia and Croatia Tome, Davorin Martinović, Miloš Kralj, Jelena Božič, Luka Basle, Tilen Jurinović, Luka 2019 http://dx.doi.org/10.1515/acro-2019-0003 https://content.sciendo.com/view/journals/acro/40/180-181/article-p55.xml https://www.sciendo.com/article/10.1515/acro-2019-0003 en eng Walter de Gruyter GmbH http://creativecommons.org/licenses/by-nc-nd/3.0 Acrocephalus volume 40, issue 180-181, page 55-67 ISSN 2199-6067 journal-article 2019 crdegruyter https://doi.org/10.1515/acro-2019-0003 2024-07-22T04:10:40Z Abstract During the breeding periods of 2018 and 2019 we investigated the extent of areas Common Terns Sterna hirundo use while searching for food. We used GPS-UHF tags to follow the movements of 23 terns from Slovenia (7 individuals) and Croatia (16 individuals). We investigated the movements of birds from three breeding sites, i.e. Lakes Ptuj, Siromaja 2 and Rakitje. Conclusions are based on 43,105 locations which were collected with a frequency of one reading per 20 minutes during the day and one reading per 4 hours during the night. In Slovenia, terns used a 60 km long and narrow area over Stara struga Drave (former river-bed of the Drava River) between Ormož and Maribor as well as eleven fishponds / lakes in its surroundings, most of them in the Pesnica valley. The most distant location was 30 km of straight line from breeding islands, but it was visited only once by a single tern. The areas with the most locations, hence important areas, were Lake Ptuj, Drava at Ptuj, Stara struga Drave between Ptuj and Rošnja and about 20 km distant Lakes Radehova and Gradiško. These were probably the most important feeding areas for Common Terns breeding on Lake Ptuj. In Croatia, terns were found along the Sava almost exclusively, with only a few visits more than 2 km from the river. The most distant locations were over 60 km away from the breeding grounds, but terns visited them only rarely. Most locations of terns nesting on Siromaja were within a 5 km radius, while terns from Rakitje were making regular flights to waters up to 23 km from their colony. The area with the most locations visited by terns from both colonies was the Sava at Hrušćica. Besides, birds from the Rakitje colony were frequently recorded on the Sava near Savica and waterbodies within 5 km of the colony. These were probably the most important feeding areas for Common Terns breeding around Zagreb. Article in Journal/Newspaper Common tern Sterna hirundo De Gruyter Acrocephalus 40 180-181 55 67 |
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Open Polar |
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De Gruyter |
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crdegruyter |
language |
English |
description |
Abstract During the breeding periods of 2018 and 2019 we investigated the extent of areas Common Terns Sterna hirundo use while searching for food. We used GPS-UHF tags to follow the movements of 23 terns from Slovenia (7 individuals) and Croatia (16 individuals). We investigated the movements of birds from three breeding sites, i.e. Lakes Ptuj, Siromaja 2 and Rakitje. Conclusions are based on 43,105 locations which were collected with a frequency of one reading per 20 minutes during the day and one reading per 4 hours during the night. In Slovenia, terns used a 60 km long and narrow area over Stara struga Drave (former river-bed of the Drava River) between Ormož and Maribor as well as eleven fishponds / lakes in its surroundings, most of them in the Pesnica valley. The most distant location was 30 km of straight line from breeding islands, but it was visited only once by a single tern. The areas with the most locations, hence important areas, were Lake Ptuj, Drava at Ptuj, Stara struga Drave between Ptuj and Rošnja and about 20 km distant Lakes Radehova and Gradiško. These were probably the most important feeding areas for Common Terns breeding on Lake Ptuj. In Croatia, terns were found along the Sava almost exclusively, with only a few visits more than 2 km from the river. The most distant locations were over 60 km away from the breeding grounds, but terns visited them only rarely. Most locations of terns nesting on Siromaja were within a 5 km radius, while terns from Rakitje were making regular flights to waters up to 23 km from their colony. The area with the most locations visited by terns from both colonies was the Sava at Hrušćica. Besides, birds from the Rakitje colony were frequently recorded on the Sava near Savica and waterbodies within 5 km of the colony. These were probably the most important feeding areas for Common Terns breeding around Zagreb. |
format |
Article in Journal/Newspaper |
author |
Tome, Davorin Martinović, Miloš Kralj, Jelena Božič, Luka Basle, Tilen Jurinović, Luka |
spellingShingle |
Tome, Davorin Martinović, Miloš Kralj, Jelena Božič, Luka Basle, Tilen Jurinović, Luka Area use and important areas for Common Tern Sterna hirundo inland populations breeding in Slovenia and Croatia |
author_facet |
Tome, Davorin Martinović, Miloš Kralj, Jelena Božič, Luka Basle, Tilen Jurinović, Luka |
author_sort |
Tome, Davorin |
title |
Area use and important areas for Common Tern Sterna hirundo inland populations breeding in Slovenia and Croatia |
title_short |
Area use and important areas for Common Tern Sterna hirundo inland populations breeding in Slovenia and Croatia |
title_full |
Area use and important areas for Common Tern Sterna hirundo inland populations breeding in Slovenia and Croatia |
title_fullStr |
Area use and important areas for Common Tern Sterna hirundo inland populations breeding in Slovenia and Croatia |
title_full_unstemmed |
Area use and important areas for Common Tern Sterna hirundo inland populations breeding in Slovenia and Croatia |
title_sort |
area use and important areas for common tern sterna hirundo inland populations breeding in slovenia and croatia |
publisher |
Walter de Gruyter GmbH |
publishDate |
2019 |
url |
http://dx.doi.org/10.1515/acro-2019-0003 https://content.sciendo.com/view/journals/acro/40/180-181/article-p55.xml https://www.sciendo.com/article/10.1515/acro-2019-0003 |
genre |
Common tern Sterna hirundo |
genre_facet |
Common tern Sterna hirundo |
op_source |
Acrocephalus volume 40, issue 180-181, page 55-67 ISSN 2199-6067 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/3.0 |
op_doi |
https://doi.org/10.1515/acro-2019-0003 |
container_title |
Acrocephalus |
container_volume |
40 |
container_issue |
180-181 |
container_start_page |
55 |
op_container_end_page |
67 |
_version_ |
1810440180569473024 |