Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995-2015

Bjarke Laubek , Preben Clausen , Leif Nilsson , Johannes Wahl , Maria Wieloch , Włodzimierz Meissner , Paul Shimmings , Bjørn-Harald Larsen , Menno Hornman , Tom Langendoen , Aleksi Lehikoinen , Leho Luigujõe , Antra Stipniece , Saulius Švažas , Laimonas Sniauksta , Verena Keller , Clémence Gaudard , Koen Devos , Zuzana Musilová , Norbert Teufelbauer , Eileen C. Rees , Anthony D. Fox

Abstract

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.
Author Bjarke Laubek
Bjarke Laubek,,
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, Preben Clausen
Preben Clausen,,
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, Leif Nilsson
Leif Nilsson,,
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, Johannes Wahl
Johannes Wahl,,
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, Maria Wieloch
Maria Wieloch,,
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, Włodzimierz Meissner (FB / DVEZ)
Włodzimierz Meissner,,
- Department of Vertebrate Ecology and Zoology
, Paul Shimmings
Paul Shimmings,,
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, Bjørn-Harald Larsen
Bjørn-Harald Larsen,,
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, Menno Hornman
Menno Hornman,,
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, Tom Langendoen
Tom Langendoen,,
-
et al.`
Journal seriesWildfowl, ISSN 0954-6324, e-ISSN 2052-6458, (N/A 40 pkt)
Issue year2019
No5 spec. iss.
Pages103-122
Publication size in sheets0.95
Keywords in Englishcensus, distribution, mainland Europe, population size, Whooper Swan
ASJC Classification1105 Ecology, Evolution, Behavior and Systematics; 2303 Ecology; 2309 Nature and Landscape Conservation
Languageen angielski
LicenseRepository; published final; Uznanie Autorstwa (CC-BY); with publication
File
Meissner_Wlodzimierz_Whooper_Swan_Cygnus_cygnus_2019.pdf 441.1 KB
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 28-02-2020, ArticleFromJournal
Publication indicators WoS Citations = 4; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.74; WoS Impact Factor: 2018 = 0.762 (2)
Citation count*2 (2020-05-25)
Additional fields
LicencjaUtwór jest udostępniany na licencji Creative Commons Uznanie autorstwa 4.0 Międzynarodowe (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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