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Effekter av oljeutsläpp på övervintrande alfågel Clangula hyemalis vid Hoburgs bank i centrala Östersjön mellan 1996/97 och 2003/04: Effects of oil spills on wintering Long-tailed Ducks Clangula hyemalis at Hoburgs bank in central Baltic Sea between 1996/97 and 2003/04
Uppsala University, Sweden.ORCID iD: 0000-0003-2737-4208
Uppsala University, Sweden.
2005 (English)In: Ornis Svecica, ISSN 1102-6812, Vol. 15, p. 161-171Article in journal (Refereed) Published
Abstract [en]

The Baltic Sea is an important marine area for wintering birds. Surveys in the 1990s showed that more than 25 % of the European Long-tailed Duck Clangula hyemalis population wintered at Hoburgs bank and east of Gotland. A shipping route with very frequent traffic goes from southwest Baltic Sea via Öland, Hoburgs bank and east of Gotland to the Gulf of Finland. In year 2000 about 58 500 ships passed east of Öland along this route. Hundreds of oils spills are registered along the route each year. Weekly surveys of oiled birds at southern Gotland and analyses of birds that had drown in fish nets showed that tens of thousands of ong-tailed Ducks were injured by oil each year in central Baltic Sea. Of 998 birds that drowned in fish nets at Hoburgs bank 11.8 % were found to have oil in the plumage. There was no clear relationship between the number of oiled birds observed and the number of registered oil spills in different years. Many sea duck have a life history in which variable or low productivity is compensated for by relatively high adult survival. This makes sea duck populations very susceptible to extra adult mortality caused by oil spills.

Place, publisher, year, edition, pages
Sveriges Ornitologiska Förenening , 2005. Vol. 15, p. 161-171
Keywords [en]
Clangula hyemalis, oil spills, Hoburg bank, Baltic Sea
National Category
Ecology
Research subject
Natural Science
Identifiers
URN: urn:nbn:se:lnu:diva-33023OAI: oai:DiVA.org:lnu-33023DiVA, id: diva2:706075
Available from: 2014-03-18 Created: 2014-03-18 Last updated: 2019-02-27Bibliographically approved

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Larsson, Kjell

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CiteExportLink to record
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Citation style
  • apa
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