Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015
Internationally coordinated censuses of Whooper Swans Cygnus cygnus across continental northwest Europe were undertaken in mid-winter 1995, 2000, 2005, 2010 and 2015. The estimate of 138,500 birds in 2015, the highest to date, represented a more than doubling of the population size (at an annual inc...
Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
---|---|
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wildfowl & Wetlands Trust
2020
|
Subjects: | |
Online Access: | http://hdl.handle.net/10138/309631 |
id |
ftunivhelsihelda:oai:helda.helsinki.fi:10138/309631 |
---|---|
record_format |
openpolar |
spelling |
ftunivhelsihelda:oai:helda.helsinki.fi:10138/309631 2024-01-07T09:42:52+01:00 Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015 Laubek, Bjarke Clausen, Preben Nilsson, Leif Wahl, Johannes Wieloch, Maria Meissner, Wlodzimierz Shimmings, Paul Larsen, Bjorn Harald Hornman, Menno Langendoen, Tom Lehikoinen, Aleksi Luigujoe, Leho Stipniece, Antra Svazas, Saulius Sniauksta, Laimonas Keller, Verena Gaudard, Clemence Devos, Koen Musilova, Zuzana Teufelbauer, Norbert Rees, Eileen C. Fox, Anthony D. Zoology Helsinki Institute of Sustainability Science (HELSUS) University Management 2020-01-16T10:04:02Z 20 application/pdf http://hdl.handle.net/10138/309631 eng eng Wildfowl & Wetlands Trust This publication is dedicated to the many hundreds of committed observers over the last 25 years who have loyally made the effort to count swans and take the care and trouble to report these along with the ancillary data, which they were asked to collect. Without your massive contribution, none of these surveys would be possible. We thank the very many organisers of the counts networks and the statutory agencies and conservation organisations that have supported financially and logistically both the national IWC and the special five-yearly International Whooper Swan counts under the auspices of the Wetlands International/IUCNSSC Swan Specialist Group (too numerous to mention here). Particular thanks to Ornithologische Arbeitsgemeinschaft Bodensee for coordinating the cross-border waterbird counts at Lake Constance. PC and ADF acknowledge funding from the Danish Environmental Protection Agency to help finalise this paper. Laubek , B , Clausen , P , Nilsson , L , Wahl , J , Wieloch , M , Meissner , W , Shimmings , P , Larsen , B H , Hornman , M , Langendoen , T , Lehikoinen , A , Luigujoe , L , Stipniece , A , Svazas , S , Sniauksta , L , Keller , V , Gaudard , C , Devos , K , Musilova , Z , Teufelbauer , N , Rees , E C & Fox , A D 2019 , ' Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015 ' , Wildfowl , no. Special issue no. 5 , pp. 103-122 . ORCID: /0000-0002-1989-277X/work/68616723 85096526889 eff960f9-71c8-4b97-9d2a-94bfbce05882 http://hdl.handle.net/10138/309631 000505157200004 cc_by openAccess info:eu-repo/semantics/openAccess census distribution mainland Europe population size Whooper Swan BREEDING SUCCESS NUMBERS ABUNDANCE ICELAND HABITAT SWEDEN SIZE 1181 Ecology evolutionary biology Article publishedVersion 2020 ftunivhelsihelda 2023-12-14T00:07:59Z Internationally coordinated censuses of Whooper Swans Cygnus cygnus across continental northwest Europe were undertaken in mid-winter 1995, 2000, 2005, 2010 and 2015. The estimate of 138,500 birds in 2015, the highest to date, represented a more than doubling of the population size (at an annual increase of 4.1%) since the first census total of 59,000 swans in 1995. The largest increase was in Denmark, where numbers almost trebled from 21,740 in 1995 to 62,620 in 2015. More than 97% of all swans were counted in just six countries. The percentage of total numbers increased significantly between 1995 and 2015 in Denmark (from 36.5% to 45.2%) and Germany (26.0% to 34.7%), but declined significantly in Sweden (14.2% to 8.4%), Norway (13.1% to 3.6%), Poland (6.2% to 4.0%) and the Netherlands (2.4% to 1.7%). The counts show an increasing discrepancy between national trends in abundance for Whooper Swans in Sweden and especially in Denmark in comparison with results obtained only from mid-winter International Waterbird Count (IWC) site coverage. This demonstrates the increasing tendency for Whooper Swans to winter in areas away from traditionally counted IWC sites and confirms the continued need for a regular cycle of coordinated dedicated swan counts to anchor population trends generated from other data sources. Peer reviewed Article in Journal/Newspaper Cygnus cygnus Iceland Whooper Swan HELDA – University of Helsinki Open Repository Norway |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
census distribution mainland Europe population size Whooper Swan BREEDING SUCCESS NUMBERS ABUNDANCE ICELAND HABITAT SWEDEN SIZE 1181 Ecology evolutionary biology |
spellingShingle |
census distribution mainland Europe population size Whooper Swan BREEDING SUCCESS NUMBERS ABUNDANCE ICELAND HABITAT SWEDEN SIZE 1181 Ecology evolutionary biology Laubek, Bjarke Clausen, Preben Nilsson, Leif Wahl, Johannes Wieloch, Maria Meissner, Wlodzimierz Shimmings, Paul Larsen, Bjorn Harald Hornman, Menno Langendoen, Tom Lehikoinen, Aleksi Luigujoe, Leho Stipniece, Antra Svazas, Saulius Sniauksta, Laimonas Keller, Verena Gaudard, Clemence Devos, Koen Musilova, Zuzana Teufelbauer, Norbert Rees, Eileen C. Fox, Anthony D. Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015 |
topic_facet |
census distribution mainland Europe population size Whooper Swan BREEDING SUCCESS NUMBERS ABUNDANCE ICELAND HABITAT SWEDEN SIZE 1181 Ecology evolutionary biology |
description |
Internationally coordinated censuses of Whooper Swans Cygnus cygnus across continental northwest Europe were undertaken in mid-winter 1995, 2000, 2005, 2010 and 2015. The estimate of 138,500 birds in 2015, the highest to date, represented a more than doubling of the population size (at an annual increase of 4.1%) since the first census total of 59,000 swans in 1995. The largest increase was in Denmark, where numbers almost trebled from 21,740 in 1995 to 62,620 in 2015. More than 97% of all swans were counted in just six countries. The percentage of total numbers increased significantly between 1995 and 2015 in Denmark (from 36.5% to 45.2%) and Germany (26.0% to 34.7%), but declined significantly in Sweden (14.2% to 8.4%), Norway (13.1% to 3.6%), Poland (6.2% to 4.0%) and the Netherlands (2.4% to 1.7%). The counts show an increasing discrepancy between national trends in abundance for Whooper Swans in Sweden and especially in Denmark in comparison with results obtained only from mid-winter International Waterbird Count (IWC) site coverage. This demonstrates the increasing tendency for Whooper Swans to winter in areas away from traditionally counted IWC sites and confirms the continued need for a regular cycle of coordinated dedicated swan counts to anchor population trends generated from other data sources. Peer reviewed |
author2 |
Zoology Helsinki Institute of Sustainability Science (HELSUS) University Management |
format |
Article in Journal/Newspaper |
author |
Laubek, Bjarke Clausen, Preben Nilsson, Leif Wahl, Johannes Wieloch, Maria Meissner, Wlodzimierz Shimmings, Paul Larsen, Bjorn Harald Hornman, Menno Langendoen, Tom Lehikoinen, Aleksi Luigujoe, Leho Stipniece, Antra Svazas, Saulius Sniauksta, Laimonas Keller, Verena Gaudard, Clemence Devos, Koen Musilova, Zuzana Teufelbauer, Norbert Rees, Eileen C. Fox, Anthony D. |
author_facet |
Laubek, Bjarke Clausen, Preben Nilsson, Leif Wahl, Johannes Wieloch, Maria Meissner, Wlodzimierz Shimmings, Paul Larsen, Bjorn Harald Hornman, Menno Langendoen, Tom Lehikoinen, Aleksi Luigujoe, Leho Stipniece, Antra Svazas, Saulius Sniauksta, Laimonas Keller, Verena Gaudard, Clemence Devos, Koen Musilova, Zuzana Teufelbauer, Norbert Rees, Eileen C. Fox, Anthony D. |
author_sort |
Laubek, Bjarke |
title |
Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015 |
title_short |
Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015 |
title_full |
Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015 |
title_fullStr |
Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015 |
title_full_unstemmed |
Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015 |
title_sort |
whooper swan cygnus cygnus january population censuses for northwest mainland europe, 1995-2015 |
publisher |
Wildfowl & Wetlands Trust |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/309631 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Cygnus cygnus Iceland Whooper Swan |
genre_facet |
Cygnus cygnus Iceland Whooper Swan |
op_relation |
This publication is dedicated to the many hundreds of committed observers over the last 25 years who have loyally made the effort to count swans and take the care and trouble to report these along with the ancillary data, which they were asked to collect. Without your massive contribution, none of these surveys would be possible. We thank the very many organisers of the counts networks and the statutory agencies and conservation organisations that have supported financially and logistically both the national IWC and the special five-yearly International Whooper Swan counts under the auspices of the Wetlands International/IUCNSSC Swan Specialist Group (too numerous to mention here). Particular thanks to Ornithologische Arbeitsgemeinschaft Bodensee for coordinating the cross-border waterbird counts at Lake Constance. PC and ADF acknowledge funding from the Danish Environmental Protection Agency to help finalise this paper. Laubek , B , Clausen , P , Nilsson , L , Wahl , J , Wieloch , M , Meissner , W , Shimmings , P , Larsen , B H , Hornman , M , Langendoen , T , Lehikoinen , A , Luigujoe , L , Stipniece , A , Svazas , S , Sniauksta , L , Keller , V , Gaudard , C , Devos , K , Musilova , Z , Teufelbauer , N , Rees , E C & Fox , A D 2019 , ' Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015 ' , Wildfowl , no. Special issue no. 5 , pp. 103-122 . ORCID: /0000-0002-1989-277X/work/68616723 85096526889 eff960f9-71c8-4b97-9d2a-94bfbce05882 http://hdl.handle.net/10138/309631 000505157200004 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
_version_ |
1787424127919849472 |