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Vattenkemi och fiskbeståndens sammansättning i storlommens Gavia arctica häckningssjöar, samt en jämförelse med smålommens Gavia stellata fiskesjöar.
University of Skövde, The Systems Biology Research Centre. University of Skövde, School of Life Sciences.
2010 (Swedish)In: Ornis Svecica, ISSN 1102-6812, Vol. 20, 3-30 p.Article in journal (Refereed) Published
Abstract [en]

Breeding  performance  of  Black-throated  Diver  Gavia arctica was compared to water chemistry, light penetration and density of fish in 122 breeding lakes in Sweden with a total of 184 pairs (1.5 pairs per lake, about 3% of the national population). The breeding lakes were on average nutrient-poor, and 12% of them had a low buffering capacity (alkalinity <0.10 meq/l). Perch Perca fluviatilis, roach Rutilus rutilus and pike Esox lucius, three species characteristic for nutrient-poor lakes, were found in more than 90% of the lakes. Salmonid fish occurred in half of the  lakes,  compared  to  >90%  of  the  fishing lakes  used by Red-throated Diver. Reproduction was related to high abundance of Perch, and the survival of chicks to light penetration. Poor nutrient status in combination with low pH or alkalinity in approximatively 10% of the breeding lakes  of  Black-throated  Diver  and  probably  more  than 30% of the fishing lakes of Red-throated Diver, indicate susceptibility  of  exposure  to  methylmercury. This  finding should be considered in relation to recent reports of increased contents of mercury in freshwater fish.

Place, publisher, year, edition, pages
Sveriges Ornitologiska förening , 2010. Vol. 20, 3-30 p.
National Category
Natural Sciences
Research subject
Natural sciences
Identifiers
URN: urn:nbn:se:his:diva-4501Scopus ID: 2-s2.0-77953942744OAI: oai:DiVA.org:his-4501DiVA: diva2:381623
Available from: 2010-12-28 Created: 2010-12-28 Last updated: 2013-09-03

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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  • vancouver
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