Brood size of twelve farmland bird species in Sweden during 1962—2001
Several farmland bird species are declining in Sweden. We investigated if the population decreases are linked to smaller broods or a higher rate of unhatched eggs. The number of broods ringed and the average number of nestlings in these broods from 1962 to 2001 were analysed for twelve species: Skyl...
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BirdLife Sweden
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ftunivlundojs:oai:journals.lub.lu.se:article/22665 2023-05-15T13:10:06+02:00 Brood size of twelve farmland bird species in Sweden during 1962—2001 Kullstorlek hos tolv arter jordbruksfåglar i Sverige under perioden 1962—2001 Ryttman, Hans Hall-Karlsson, K Susanna S 2009-01-01 application/pdf https://journals.lub.lu.se/os/article/view/22665 https://doi.org/10.34080/os.v19.22665 eng eng BirdLife Sweden https://journals.lub.lu.se/os/article/view/22665/20160 https://journals.lub.lu.se/os/article/view/22665 doi:10.34080/os.v19.22665 Copyright (c) 2009 Hans Ryttman, K Susanna S Hall-Karlsson Ornis Svecica; Vol. 19 No. 1 (2009); 3-12 Ornis Svecica; Vol 19 Nr 1 (2009); 3-12 2003-2633 1102-6812 breeding success population studies passerines hatching success conservation agriculture häckningsframgång populationsstudier tättingar kläckningsframgång naturvård lantbruk info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Research Paper text Fackgranskad uppsats 2009 ftunivlundojs https://doi.org/10.34080/os.v19.22665 2023-03-08T23:27:59Z Several farmland bird species are declining in Sweden. We investigated if the population decreases are linked to smaller broods or a higher rate of unhatched eggs. The number of broods ringed and the average number of nestlings in these broods from 1962 to 2001 were analysed for twelve species: Skylark Alauda arvensis, Swallow Hirundo rustica, House Martin Delichon urbica, Meadow Pipit Anthus pratensis, White Wagtail Motacilla alba, Wheatear Oenanthe oenanthe, Whitethroat Sylvia communis, Starling Sturnus vulgaris, House Sparrow Passer domesticus, Tree Sparrow Passer montanus, Linnet Carduelis cannabina and Yellowhammer Emberiza citrinella. Only two of the investigated species, the Tree Sparrow and the Yellowhammer, showed a statistically significant decline in average brood size over time. We conclude that changes in brood size alone cannot explain the decline in several farmland bird species. The House Sparrow showed an increase in the number of dead nestlings and data for House Sparrow, Tree Sparrow and Whitethroat indicated that a higher rate of unhatched eggs might be a problem. Article in Journal/Newspaper Alauda arvensis Open Journals at Lund University (OJLU) Ornis Svecica 19 1 3 12 |
institution |
Open Polar |
collection |
Open Journals at Lund University (OJLU) |
op_collection_id |
ftunivlundojs |
language |
English |
topic |
breeding success population studies passerines hatching success conservation agriculture häckningsframgång populationsstudier tättingar kläckningsframgång naturvård lantbruk |
spellingShingle |
breeding success population studies passerines hatching success conservation agriculture häckningsframgång populationsstudier tättingar kläckningsframgång naturvård lantbruk Ryttman, Hans Hall-Karlsson, K Susanna S Brood size of twelve farmland bird species in Sweden during 1962—2001 |
topic_facet |
breeding success population studies passerines hatching success conservation agriculture häckningsframgång populationsstudier tättingar kläckningsframgång naturvård lantbruk |
description |
Several farmland bird species are declining in Sweden. We investigated if the population decreases are linked to smaller broods or a higher rate of unhatched eggs. The number of broods ringed and the average number of nestlings in these broods from 1962 to 2001 were analysed for twelve species: Skylark Alauda arvensis, Swallow Hirundo rustica, House Martin Delichon urbica, Meadow Pipit Anthus pratensis, White Wagtail Motacilla alba, Wheatear Oenanthe oenanthe, Whitethroat Sylvia communis, Starling Sturnus vulgaris, House Sparrow Passer domesticus, Tree Sparrow Passer montanus, Linnet Carduelis cannabina and Yellowhammer Emberiza citrinella. Only two of the investigated species, the Tree Sparrow and the Yellowhammer, showed a statistically significant decline in average brood size over time. We conclude that changes in brood size alone cannot explain the decline in several farmland bird species. The House Sparrow showed an increase in the number of dead nestlings and data for House Sparrow, Tree Sparrow and Whitethroat indicated that a higher rate of unhatched eggs might be a problem. |
format |
Article in Journal/Newspaper |
author |
Ryttman, Hans Hall-Karlsson, K Susanna S |
author_facet |
Ryttman, Hans Hall-Karlsson, K Susanna S |
author_sort |
Ryttman, Hans |
title |
Brood size of twelve farmland bird species in Sweden during 1962—2001 |
title_short |
Brood size of twelve farmland bird species in Sweden during 1962—2001 |
title_full |
Brood size of twelve farmland bird species in Sweden during 1962—2001 |
title_fullStr |
Brood size of twelve farmland bird species in Sweden during 1962—2001 |
title_full_unstemmed |
Brood size of twelve farmland bird species in Sweden during 1962—2001 |
title_sort |
brood size of twelve farmland bird species in sweden during 1962—2001 |
publisher |
BirdLife Sweden |
publishDate |
2009 |
url |
https://journals.lub.lu.se/os/article/view/22665 https://doi.org/10.34080/os.v19.22665 |
genre |
Alauda arvensis |
genre_facet |
Alauda arvensis |
op_source |
Ornis Svecica; Vol. 19 No. 1 (2009); 3-12 Ornis Svecica; Vol 19 Nr 1 (2009); 3-12 2003-2633 1102-6812 |
op_relation |
https://journals.lub.lu.se/os/article/view/22665/20160 https://journals.lub.lu.se/os/article/view/22665 doi:10.34080/os.v19.22665 |
op_rights |
Copyright (c) 2009 Hans Ryttman, K Susanna S Hall-Karlsson |
op_doi |
https://doi.org/10.34080/os.v19.22665 |
container_title |
Ornis Svecica |
container_volume |
19 |
container_issue |
1 |
container_start_page |
3 |
op_container_end_page |
12 |
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1766214988946472960 |