Densities of individually marked migrants away from the marking site to estimate population sizes:A test with three wader populations
Capsule Population estimates based on the mark-resighting method can be a useful alternative to population-wide counts. Aims To investigate whether the mark-resighting method can be used as an alternative to counts to estimate the size of wader populations. Methods Individual colour-marking and subs...
Published in: | Bird Study |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2011
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Online Access: | https://hdl.handle.net/11370/0f3d81c5-f59c-4839-a815-daed7fdbb8fb https://research.rug.nl/en/publications/0f3d81c5-f59c-4839-a815-daed7fdbb8fb https://doi.org/10.1080/00063657.2011.566601 https://pure.rug.nl/ws/files/6761194/2011BirdStudySpaans.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/0f3d81c5-f59c-4839-a815-daed7fdbb8fb 2024-06-02T08:04:47+00:00 Densities of individually marked migrants away from the marking site to estimate population sizes:A test with three wader populations Spaans, Bernard Van Kooten, Laurens Cremer, Jenny Leyrer, Jutta Piersma, Theunis 2011 application/pdf https://hdl.handle.net/11370/0f3d81c5-f59c-4839-a815-daed7fdbb8fb https://research.rug.nl/en/publications/0f3d81c5-f59c-4839-a815-daed7fdbb8fb https://doi.org/10.1080/00063657.2011.566601 https://pure.rug.nl/ws/files/6761194/2011BirdStudySpaans.pdf eng eng https://research.rug.nl/en/publications/0f3d81c5-f59c-4839-a815-daed7fdbb8fb info:eu-repo/semantics/openAccess Spaans , B , Van Kooten , L , Cremer , J , Leyrer , J & Piersma , T 2011 , ' Densities of individually marked migrants away from the marking site to estimate population sizes : A test with three wader populations ' , Bird Study , vol. 58 , no. 2 , pp. 130-140 . https://doi.org/10.1080/00063657.2011.566601 KNOTS CALIDRIS-CANUTUS BAR-TAILED GODWITS WADDEN SEA MIGRATION STRATEGIES ENERGY MINIMIZERS SPRING MIGRATION LIMOSA-LAPPONICA TIME MINIMIZERS BANC-DARGUIN HABITAT USE article 2011 ftunigroningenpu https://doi.org/10.1080/00063657.2011.566601 2024-05-07T18:49:19Z Capsule Population estimates based on the mark-resighting method can be a useful alternative to population-wide counts. Aims To investigate whether the mark-resighting method can be used as an alternative to counts to estimate the size of wader populations. Methods Individual colour-marking and subsequent resightings allowed accurate estimates of annual survival for three populations of waders, on which basis we could estimate the actual number of marked birds alive. Densities of marked birds were determined on sites away (2000-4300 km) from the ringing locations expecting marked birds to be randomly distributed among non-marked conspecifics. Population sizes are estimated by combining these densities with the number of marked birds alive. Results We found indications that the distribution of marked birds was indeed random in the locations away from the site of marking. The estimated population size of Red Knot Calidris canutus canutus was in accordance with the most recent estimates based on counts. Our estimate of the Calidris c. islandica population was somewhat lower, and that of the Bar-tailed Godwit Limosa lapponica taymyrensis population was considerably lower than the latest estimates based on counts. Conclusion Population estimates based on the mark-resighting method can be a useful alternative for, or addition to, population-wide counts, as long as the assumption of random distribution of marked birds at the reading sites is taken into account. We conclude that the Afro-Siberian Bar-tailed Godwit population has recently decreased in size or has been substantially overestimated during the counts. Article in Journal/Newspaper Calidris canutus Red Knot University of Groningen research database Bird Study 58 2 130 140 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
KNOTS CALIDRIS-CANUTUS BAR-TAILED GODWITS WADDEN SEA MIGRATION STRATEGIES ENERGY MINIMIZERS SPRING MIGRATION LIMOSA-LAPPONICA TIME MINIMIZERS BANC-DARGUIN HABITAT USE |
spellingShingle |
KNOTS CALIDRIS-CANUTUS BAR-TAILED GODWITS WADDEN SEA MIGRATION STRATEGIES ENERGY MINIMIZERS SPRING MIGRATION LIMOSA-LAPPONICA TIME MINIMIZERS BANC-DARGUIN HABITAT USE Spaans, Bernard Van Kooten, Laurens Cremer, Jenny Leyrer, Jutta Piersma, Theunis Densities of individually marked migrants away from the marking site to estimate population sizes:A test with three wader populations |
topic_facet |
KNOTS CALIDRIS-CANUTUS BAR-TAILED GODWITS WADDEN SEA MIGRATION STRATEGIES ENERGY MINIMIZERS SPRING MIGRATION LIMOSA-LAPPONICA TIME MINIMIZERS BANC-DARGUIN HABITAT USE |
description |
Capsule Population estimates based on the mark-resighting method can be a useful alternative to population-wide counts. Aims To investigate whether the mark-resighting method can be used as an alternative to counts to estimate the size of wader populations. Methods Individual colour-marking and subsequent resightings allowed accurate estimates of annual survival for three populations of waders, on which basis we could estimate the actual number of marked birds alive. Densities of marked birds were determined on sites away (2000-4300 km) from the ringing locations expecting marked birds to be randomly distributed among non-marked conspecifics. Population sizes are estimated by combining these densities with the number of marked birds alive. Results We found indications that the distribution of marked birds was indeed random in the locations away from the site of marking. The estimated population size of Red Knot Calidris canutus canutus was in accordance with the most recent estimates based on counts. Our estimate of the Calidris c. islandica population was somewhat lower, and that of the Bar-tailed Godwit Limosa lapponica taymyrensis population was considerably lower than the latest estimates based on counts. Conclusion Population estimates based on the mark-resighting method can be a useful alternative for, or addition to, population-wide counts, as long as the assumption of random distribution of marked birds at the reading sites is taken into account. We conclude that the Afro-Siberian Bar-tailed Godwit population has recently decreased in size or has been substantially overestimated during the counts. |
format |
Article in Journal/Newspaper |
author |
Spaans, Bernard Van Kooten, Laurens Cremer, Jenny Leyrer, Jutta Piersma, Theunis |
author_facet |
Spaans, Bernard Van Kooten, Laurens Cremer, Jenny Leyrer, Jutta Piersma, Theunis |
author_sort |
Spaans, Bernard |
title |
Densities of individually marked migrants away from the marking site to estimate population sizes:A test with three wader populations |
title_short |
Densities of individually marked migrants away from the marking site to estimate population sizes:A test with three wader populations |
title_full |
Densities of individually marked migrants away from the marking site to estimate population sizes:A test with three wader populations |
title_fullStr |
Densities of individually marked migrants away from the marking site to estimate population sizes:A test with three wader populations |
title_full_unstemmed |
Densities of individually marked migrants away from the marking site to estimate population sizes:A test with three wader populations |
title_sort |
densities of individually marked migrants away from the marking site to estimate population sizes:a test with three wader populations |
publishDate |
2011 |
url |
https://hdl.handle.net/11370/0f3d81c5-f59c-4839-a815-daed7fdbb8fb https://research.rug.nl/en/publications/0f3d81c5-f59c-4839-a815-daed7fdbb8fb https://doi.org/10.1080/00063657.2011.566601 https://pure.rug.nl/ws/files/6761194/2011BirdStudySpaans.pdf |
genre |
Calidris canutus Red Knot |
genre_facet |
Calidris canutus Red Knot |
op_source |
Spaans , B , Van Kooten , L , Cremer , J , Leyrer , J & Piersma , T 2011 , ' Densities of individually marked migrants away from the marking site to estimate population sizes : A test with three wader populations ' , Bird Study , vol. 58 , no. 2 , pp. 130-140 . https://doi.org/10.1080/00063657.2011.566601 |
op_relation |
https://research.rug.nl/en/publications/0f3d81c5-f59c-4839-a815-daed7fdbb8fb |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1080/00063657.2011.566601 |
container_title |
Bird Study |
container_volume |
58 |
container_issue |
2 |
container_start_page |
130 |
op_container_end_page |
140 |
_version_ |
1800749447375749120 |