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Golden Eagle (3 Viewers)
- Thread starter Richard Klim
- Start date
Peter Kovalik
Well-known member
Jacqueline M. Doyle, Todd E. Katzner, Peter H. Bloom, Yanzhu Ji, Bhagya K. Wijayawardena, J. Andrew DeWoody. The Genome Sequence of a Widespread Apex Predator, the Golden Eagle (Aquila chrysaetos). PLoS ONE, 2014; 9 (4): e95599 DOI: 10.1371/journal.pone.0095599
Richard Klim
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Nebel et al
Forthcoming...
Nebel, Gamauf, Haring, Segelbacher, Villers & Zachos (in press). Mitochondrial DNA analysis reveals Holarctic homogeneity and a distinct Mediterranean lineage in the Golden eagle (Aquila chrysaetos). Biol J Linn Soc. [abstract]
Homeyer's Golden Eagle Aquila chrysaetos homeyeri is listed as a 'distinct subspecies sometimes considered specifically distinct' by van den Berg 2015 (Dutch Birding bird names).
Orta, Kirwan & Boesman 2013 (HBW Alive).
Forthcoming...
Nebel, Gamauf, Haring, Segelbacher, Villers & Zachos (in press). Mitochondrial DNA analysis reveals Holarctic homogeneity and a distinct Mediterranean lineage in the Golden eagle (Aquila chrysaetos). Biol J Linn Soc. [abstract]
Homeyer's Golden Eagle Aquila chrysaetos homeyeri is listed as a 'distinct subspecies sometimes considered specifically distinct' by van den Berg 2015 (Dutch Birding bird names).
Orta, Kirwan & Boesman 2013 (HBW Alive).
Richard Klim
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Richard Klim
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Daniel Philippe
Well-known member
Doyle J.M., Katzner T.E., Roemer G.W., Cain J.W. III, Millsap B.A., McIntyre C.L., Sonsthagen S.A., Fernandez N.B., Wheeler M., Bulut Z., Bloom P.H. & DeWoody J.A., 2016. Genetic structure and viability selection in the Golden Eagle (Aquila chrysaetos), a vagile raptor with a Holarctic distribution. Conserv. Genet. 17: 1307-1322.
Abstract Molecular markers can reveal interesting aspects of organismal ecology and evolution, especially when surveyed in rare or elusive species. Herein, we provide a preliminary assessment of golden eagle (Aquila chrysaetos) population structure in North America using novel single nucleotide polymorphisms (SNPs). These SNPs included one molecular sexing marker, two mitochondrial markers, 85 putatively neutral markers that were derived from noncoding regions within large intergenic intervals, and 74 putatively nonneutral markers found in or very near protein-coding genes. We genotyped 523 eagle samples at these 162 SNPs and quantified genotyping error rates and variability at each marker. Our samples corresponded to 344 individual golden eagles as assessed by unique multilocus genotypes. Observed heterozygosity of known adults was significantly higher than of chicks, as was the number of heterozygous loci, indicating that mean zygosity measured across all 159 autosomal markers was an indicator of fitness as it is associated with eagle survival to adulthood. Finally, we used chick samples of known provenance to test for population differentiation across portions of North America and found pronounced structure among geographic sampling sites. These data indicate that cryptic genetic population structure is likely widespread in the golden eagle gene pool, and that extensive field sampling and genotyping will be required to more clearly delineate management units within North America and elsewhere.
Abstract Molecular markers can reveal interesting aspects of organismal ecology and evolution, especially when surveyed in rare or elusive species. Herein, we provide a preliminary assessment of golden eagle (Aquila chrysaetos) population structure in North America using novel single nucleotide polymorphisms (SNPs). These SNPs included one molecular sexing marker, two mitochondrial markers, 85 putatively neutral markers that were derived from noncoding regions within large intergenic intervals, and 74 putatively nonneutral markers found in or very near protein-coding genes. We genotyped 523 eagle samples at these 162 SNPs and quantified genotyping error rates and variability at each marker. Our samples corresponded to 344 individual golden eagles as assessed by unique multilocus genotypes. Observed heterozygosity of known adults was significantly higher than of chicks, as was the number of heterozygous loci, indicating that mean zygosity measured across all 159 autosomal markers was an indicator of fitness as it is associated with eagle survival to adulthood. Finally, we used chick samples of known provenance to test for population differentiation across portions of North America and found pronounced structure among geographic sampling sites. These data indicate that cryptic genetic population structure is likely widespread in the golden eagle gene pool, and that extensive field sampling and genotyping will be required to more clearly delineate management units within North America and elsewhere.
Daniel Philippe
Well-known member
Judkins M.E. & van den Bussche R.A., in press. Holarctic phylogeography of Golden Eagles (Aquila chrysaetos) and evaluation of alternative North American management approaches. Biol. J. Linn. Soc.
Abstract - The golden eagle (Aquila chrysaetos) is a long-lived bird of prey with a Holarctic distribution. This species has survived severe anthropogenic stressors that have reduced or eliminated populations in some parts of its range. Despite the ecological and cultural importance of the golden eagle, few attempts have been made to determine the partitioning of genetic variation over large areas of its range. This study generated DNA sequence data from the mitochondrial DNA control region from 115 North American golden eagles and combined these data with existing control region sequences from over 300 Nearctic, Palearctic and Mediterranean golden eagles to provide a clearer holistic picture of the Holarctic phylogeographical patterns of genetic variation in this species and the genetic variation and demographic history of golden eagles in North America. The results support that there are two genetic lineages of golden eagles, one representing the Mediterranean and the other occurring throughout the Holarctic. The Holarctic lineage reveals little to no modern-day gene flow between Nearctic and Palearctic golden eagles. Furthermore, the current distribution of haplotypes in the Nearctic shows a recent population expansion with moderate levels of gene flow.
Abstract - The golden eagle (Aquila chrysaetos) is a long-lived bird of prey with a Holarctic distribution. This species has survived severe anthropogenic stressors that have reduced or eliminated populations in some parts of its range. Despite the ecological and cultural importance of the golden eagle, few attempts have been made to determine the partitioning of genetic variation over large areas of its range. This study generated DNA sequence data from the mitochondrial DNA control region from 115 North American golden eagles and combined these data with existing control region sequences from over 300 Nearctic, Palearctic and Mediterranean golden eagles to provide a clearer holistic picture of the Holarctic phylogeographical patterns of genetic variation in this species and the genetic variation and demographic history of golden eagles in North America. The results support that there are two genetic lineages of golden eagles, one representing the Mediterranean and the other occurring throughout the Holarctic. The Holarctic lineage reveals little to no modern-day gene flow between Nearctic and Palearctic golden eagles. Furthermore, the current distribution of haplotypes in the Nearctic shows a recent population expansion with moderate levels of gene flow.
l_raty
laurent raty
Jacana
Will Jones
Karabanina, E., Lansink, G. M. J., Ponnikas, S., & Kvist, L. (2024). A renewed glance at the Palearctic golden eagle: Genetic variation in space and time. Ecology and Evolution, 14, e11109. https://doi.org/10.1002/ece3.11109
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.
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.
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