| 1. |
- Fredga, Karl, et al.
(författare)
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An early (1834) illustration of the wood lemming, Myopus schisticolor (Lilljeborg, 1844), from Finland
- 2011
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Ingår i: Archives of Natural History. - : Edinburgh University Press. - 0260-9541 .- 1755-6260. ; 38:2, s. 214-219
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Tidskriftsartikel (refereegranskat)abstract
- The wood lemming, Myopus schisticolor, was described as a new species by the Swedish zoologist Wilhelm Lilljeborg in 1844 from a specimen captured in Norway the year before. With the original description was a fine hand-coloured lithograph by the artist Magnus Korner. A Latin translation of the description published later that year also used an illustration by Korner, but it was of lesser quality. However, the species had been observed, described and depicted earlier, but these renderings never reached the scientific community. In 2008 and 2009 respectively, one illustration of the wood lemming made by the Finnish-born artist Wilhelm von Wright was sold twice at auctions in Stockholm. The illustration is dated 1834 and shows a specimen that was found dead at the artist's native home, Haminalaks, in Kuopio parish, Central Finland, that year. However, an accurate description of the species had already been made in 1765, by a group of young naturalists on a tour in the Swedish province Dalecarlia.
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| 2. |
- Mucci, Nadia, et al.
(författare)
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Genetic diversity and landscape genetic structure of otter (Lutra lutra) populations in Europe
- 2010
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Ingår i: Conservation Genetics. - : Springer Science and Business Media LLC. - 1566-0621 .- 1572-9737. ; 11:2, s. 583-599
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Tidskriftsartikel (refereegranskat)abstract
- Eurasian otter populations strongly declined and partially disappeared due to global and local causes (habitat destruction, water pollution, human persecution) in parts of their continental range. Conservation strategies, based on reintroduction projects or restoration of dispersal corridors, should rely on sound knowledge of the historical or recent consequences of population genetic structuring. Here we present the results of a survey performed on 616 samples, collected from 19 European countries, genotyped at the mtDNA control-region and 11 autosomal microsatellites. The mtDNA variability was low (nucleotide diversity = 0.0014; average number of pairwise differences = 2.25), suggesting that extant otter mtDNA lineages originated recently. A star-shaped mtDNA network did not allow outlining any phylogeographic inference. Microsatellites were only moderately variable (H (o) = 0.50; H (e) = 0.58, on average across populations), the average allele number was low (observed A (o) = 4.9, range 2.5-6.8; effective A (e) = 2.8; range 1.6-3.7), suggesting small historical effective population size. Extant otters likely originated from the expansion of a single refugial population. Bayesian clustering and landscape genetic analyses however indicate that local populations are genetically differentiated, perhaps as consequence of post-glacial demographic fluctuations and recent isolation. These results delineate a framework that should be used for implementing conservation programs in Europe, particularly if they are based on the reintroduction of wild or captive-reproduced otters.
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| 3. |
- Ponnikas, Suvi, et al.
(författare)
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Genetic structure of an endangered raptor at individual and population levels
- 2013
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Ingår i: Conservation Genetics. - : Springer Science and Business Media LLC. - 1566-0621 .- 1572-9737. ; 14:6, s. 1135-1147
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Tidskriftsartikel (refereegranskat)abstract
- The Finnish population of White-tailed Eagle (Haliaeetus albicilla) has gone through two major demographic bottlenecks during the last two centuries. Strong conservation measures have allowed the population to recover, but despite the rapid population growth during recent years the species is still classified as endangered. We studied the genetic population structure at both individual and population levels in an attempt to recognize the processes shaping it. We used 9 microsatellite loci and 473 base pair fragment of the mitochondrial DNA control region on samples collected between the years 2003 and 2007 (N = 489). We found a clear isolation by distance pattern at fine scale (i.e. individual level) which is most likely a result of species' philopatric behaviour. Although we did not find signs of the recent bottlenecks, we did find evidence of an ancient bottleneck that has occurred most likely over 21,000 years ago, long before the genetic divergence of the two present Finnish subpopulations (one along the Baltic Sea coast line and another in Lapland and easternmost Finland). We conclude that the present population structure is mainly a consequence of the species philopatric behaviour over a long time period instead of recent population bottlenecks. Based on our results, the Finnish population seems to have ongoing immigration from neighbouring populations. Hence, even though the population has recovered mainly through local growth, our results suggest that gene flow from genetically differentiated populations have had an impact as well.
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