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dc.contributor.authorÅhlen, Per-Arne
dc.contributor.authorWillebrand, Tomas
dc.contributor.authorSjöberg, Kjell
dc.contributor.authorHörnell-Willebrand, Maria
dc.date.accessioned2014-01-17T07:18:03Z
dc.date.available2014-01-17T07:18:03Z
dc.date.issued2013
dc.identifier.citationÅhlen, P.-A., Willebrand, T., Sjöberg, K., & Willebrand, M. H. (2013). Survival of female capercaillie Tetrao urogallus in northern Sweden. [Vitenskapelig artikkel]. Wildlife Biology, 19, 368-373. doi: http://dx.doi.org10.2981/13-025no_NO
dc.identifier.urihttp://hdl.handle.net/11250/134636
dc.description.abstractWe studied survival and cause-specific mortality of radio-marked capercaillie Tetrao urogallus females relative to habitat type in northern Sweden during 2000-2004. Our high-mountain area (1,600 km2) consisted of the alpine transition zone from Norway spruce Picea abies-dominated forest,mountain birch Betula pubescens and alpine heath. Our low-mountain areas consisted of two forest areas (300 and 160 km2) dominated by Scots pine Pinus sylvestris and characterised by more intensive forestry than the first-mentioned area. Predation was the most common cause of mortality in both the highmountain (70%) and low-mountain (90%) areas. We attributed 10% of mortality in both areas to hunting. Collisions with cars and power lines were only documented in the high-mountain area. A Cox-proportional regression model stratified by year suggested that hazard was lower for yearlings and birds using low-mountain areas, but these estimates were associated with large uncertainties. Pooling all individuals showed an average annual survival probability of 0.68 (0.62-0.75; 95%CI), with no tendency for hazard to vary among seasons. Because survival of females was comparable to those reported in other studies and the harvest mortality was low, we suggest that the capercaillie population in the Swedish high-mountain region does not need any changes in the present management strategy.no_NO
dc.language.isoengno_NO
dc.publisherNordic Council for Wildlife Researchno_NO
dc.subjectcapercaillieno_NO
dc.subjecthabitatno_NO
dc.subjectharvestno_NO
dc.subjectpredationno_NO
dc.subjectsurvivalno_NO
dc.subjectTetrao urogallusno_NO
dc.titleSurvival of female capercaillie Tetrao urogallus in northern Swedenno_NO
dc.typeJournal articleno_NO
dc.typePeer reviewedno_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480no_NO
dc.source.pagenumber368-373no_NO
dc.source.volume19no_NO
dc.source.journalWildlife Biologyno_NO
dc.identifier.doi10.2981/13-025


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