7 results on '"Lansink, Gerhardus M. J."'
Search Results
2. Population genetics of the wolverine in Finland: the road to recovery?
- Author
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Lansink, Gerhardus M. J., Esparza-Salas, Rodrigo, Joensuu, Maija, Koskela, Anni, Bujnáková, Dominika, Kleven, Oddmund, Flagstad, Øystein, Ollila, Tuomo, Kojola, Ilpo, Aspi, Jouni, and Kvist, Laura
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- 2020
- Full Text
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3. A renewed glance at the Palearctic golden eagle: Genetic variation in space and time.
- Author
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Karabanina, Ekaterina, Lansink, Gerhardus M. J., Ponnikas, Suvi, and Kvist, Laura
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GOLDEN eagle , *GENETIC variation , *POPULATION genetics , *PALEARCTIC , *MITOCHONDRIAL DNA , *CHLOROPLAST DNA - Abstract
Anthropogenic pressures on nature have been causing population declines for centuries. Intensified persecution of apex predators, like the golden eagle, resulted in population bottlenecks during the 19th and 20th centuries. To study population genetics and demographic history of the golden eagle throughout its distribution, we collected museum samples from previously underrepresented regions, such as Russia and Central Asia. We used 12 microsatellite loci and a fragment of the mitochondrial DNA control region to re‐evaluate phylogeography of Eurasian golden eagles and study the impacts of the population bottleneck. Our results revealed a north–south genetic gradient, expressed by the difference between Mediterranean and Holarctic lineages, as well as genetically distinct Northern Europe and Central Asia and Caucasus regions. Furthermore, Northern Europe exhibited the lowest, whereas Central Asia and Caucasus had the highest genetic diversity. Although golden eagles maintained relatively high genetic diversity, we detected genetic signatures of the recent bottleneck, including reduced genetic diversity and a decline in the effective female population size around the year 1975. Our study improves the knowledge of the genetic composition of Eurasian golden eagles and highlights the importance of understanding their historical population dynamics in the face of ongoing and future conservation efforts. [ABSTRACT FROM AUTHOR]
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- 2024
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4. Long-term dietary shifts in a generalist predator, the wolverine (Gulo gulo)
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Massé, Clément F., primary, Hiltunen, Tamara A., additional, Lansink, Gerhardus M. J., additional, Holmala, Katja, additional, Isomursu, Marja, additional, Kojola, Ilpo, additional, Aspi, Jouni, additional, and Welker, Jeffery M., additional
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- 2023
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5. Diversity of the MHC class II DRB gene in the wolverine (Carnivora: Mustelidae: Gulo gulo) in Finland
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Sugiyama, Yuri, Nishita, Yoshinori, Lansink, Gerhardus M. J., Holmala, Katja, Aspi, Jouni, 1000080192748, Masuda, Ryuichi, Sugiyama, Yuri, Nishita, Yoshinori, Lansink, Gerhardus M. J., Holmala, Katja, Aspi, Jouni, 1000080192748, and Masuda, Ryuichi
- Abstract
The wolverine (Gulo gulo) in Finland has undergone significant population declines in the past. Since major histocompatibility complex (MHC) genes encode proteins involved in pathogen recognition, the diversity of these genes provides insights into the immunological fitness of regional populations. We sequenced 862 amplicons (242 bp) of MHC class II DRB exon 2 from 32 Finnish wolverines and identified 11 functional alleles and three pseudogenes. A molecular phylogenetic analysis indicated trans-species polymorphism, and PAML and MEME analyses indicated positive selection, suggesting that the Finnish wolverine DRB genes have evolved under balancing and positive selection. In contrast to DRB gene analyses in other species, allele frequencies in the Finnish wolverines clearly indicated the existence of two regional subpopulations, congruent with previous studies based on neutral genetic markers. In the Finnish wolverine, rapid population declines in the past have promoted genetic drift, resulting in a lower genetic diversity of DRB loci, including fewer alleles and positively selected sites, than other mustelid species analyzed previously. Our data suggest that the MHC region in the Finnish wolverine population was likely affected by a recent bottleneck.
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- 2022
6. Diversity of the MHC class II DRB gene in the wolverine (Carnivora: Mustelidae: Gulo gulo) in Finland
- Author
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Sugiyama, Yuri, primary, Nishita, Yoshinori, additional, Lansink, Gerhardus M. J., additional, Holmala, Katja, additional, Aspi, Jouni, additional, and Masuda, Ryuichi, additional
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- 2022
- Full Text
- View/download PDF
7. Estimation of gene flow into the Scandinavian wolverine
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Kleven, Oddmund, Ekblom, Robert, Spong, Göran, Lansink, Gerhardus M. J., Aspi, Jouni, Creel, Scott, Kojola, Ilpo, Kopatz, Alexander, Koskela, Anni, Kvist, Laura, Singh, Navinder, Kindberg, Jonas, Ellegren, Hans, and Flagstad, Øystein
- Subjects
Wolverine ,Gulo gulo ,konnektivitet ,genflyt ,connectivity ,population genetic structure ,gene flow ,Jerv ,populasjonsgenetisk struktur - Abstract
Kleven, O., Ekblom, R., Spong, G., Lansink, G. M. J., Aspi, J., Creel, S., Kojola, I., Kopatz, A., Koskela, A., Kvist, L., Singh, N., Kindberg, J., Ellegren H. & Flagstad, Ø. 2019. Estimation of gene flow into the Scandinavian wolverine population. NINA Report 1617. Norwegian Institute for Nature Research. Commissioned by the Swedish Environmental Protection Agency (SEPA), a project was conducted to provide data for the current evaluation of favourable conservation status of the wolverine in Sweden. In this report we present the results from this project, in which the main aim was to estimate gene flow into the Scandinavian, and in particular the Swedish wolverine population. Applying different genetic markers, a comprehensive sampling and various statistical ap-proaches, we examined the population genetic structure and connectivity of wolverines in Fennoscandia. We found that wolverines in central Scandinavia were genetically different from those in northern Fennoscandia (i.e., the counties Troms and Finnmark in northern Norway, the northernmost part of Norrbotten in Sweden, and most of Lappland in northern Finland), and wolverines in southern Finland formed a separate genetic cluster. Although there was evidence of genetic substructuring, the change was gradual and showed a pattern of isolation-by-distance. Dispersal events were common but not symmetrical between the identified genetic clusters. Migration rates between central Scandinavia and northern Fennoscandia, as well as from northern Fennoscandia to southern Finland, was moderate, while it was low from southern Finland to the other two sub-populations. Based on the current population size, we estimated that 15-22 wolverines from northern Fennoscandia, and 0.04-0.46 wolverines from southern Finland have migrated into the central Scandinavian sub-population, which included a large part of the Swedish wolverine population, per generation. Despite limited influx of eastern wolverines, our findings indicate the potential for gene flow into the Swedish population, and most likely so through the corridor in northern Fennoscandia. Kleven, O., Ekblom, R., Spong, G., Lansink, G. M. J., Aspi, J., Creel, S., Kojola, I., Kopatz, A., Koskela, A., Kvist, L., Singh, N., Kindberg, J., Ellegren H. & Flagstad, Ø. 2019. Estimering av genflyt til den Skandinaviske jerv populasjonen. NINA Rapport 1617. Norsk institutt for naturforskning. På oppdrag fra Naturvårdsverket ble et prosjekt gjennomført for å fremskaffe data til en forestående vurdering av bevaringsstatus for jerv i Sverige. I denne rapporten presenterer vi resultatene fra dette prosjektet, hvor hovedformålet var å estimere genflyt til den skandinaviske, og spesielt til den svenske jerv-bestanden. Ved å benytte ulike genetiske markører, et betydelig antall prøver og ulike statistiske analyser, undersøkte vi populasjonsgenetisk struktur og konnektivitet blant jerv i Fennoskandia. Vi fant at jerv i den sentrale delen av Skandinavia var genetisk forskjellig fra jerv i det nordlige området av Fennoskandia (det vil si fylkene Troms og Finnmark, den nordligste delen av Norrbotten i Sverige og det meste av Lappland i Nord-Finland), og at jervene i det sørlige Finland utgjorde en egen genetisk gruppe. Selv om det var evidens for genetisk strukturering, var endringene gradvise og viste et mønster som samsvarte med isolasjon basert på geografisk avstand. Vandringer var vanlige, men de forekom ikke i like stor grad mellom de ulike genetiske gruppene. Migrasjonsratene mellom midt-Skandinavia og nordlige Fennoskandia, samt fra nordlige Fennoskandia til sørlige Finland, var moderat, mens det var lavt fra sørlige Finland til de andre to delpopulasjonene. Basert på den nåværende bestands-størrelsen, estimerte vi at 15-22 jerver fra nordlige Fennoskandia, og 0,04-0,46 jerver fra sørlige Finland har migrert til den midt-skandinaviske delpopulasjonen, som inneholder er stor andel av den svenske jerv-bestanden, per generasjon. På tross av begrenset immigrasjon av jerv fra østlige områder, så indikerer våre resultater at det er potensiale for genflyt inn til den svenske populasjonen av jerv, og da spesielt via korridoren i det nordlige Fennoskandia.
- Published
- 2019
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