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57 results for “peripheral populations”
Figure 2 in Limited genetic depletion despite extinction risk: genomic diversity of a peripheral population of red-spotted bluethroats in Central Europe
Figure 2. Box plot comparison of genome-wide heterozygosity by segregating sites at subspecies level (left) and at population level (right). Mean values are marked by a horizontal bar.
Data from: Genetic population structure of the blister beetle Gnathium minimum: core and peripheral populations
Populations on the periphery of a species' range tend to contain lower genetic variation and increased genetic differentiation compared to populations at the core of a species range, although some exceptions to this generalization occur. The blister beetle Gnathium minimum (Say) exhibits a wide-ranging distribution in the western United States but has peripheral or disjunct populations in Mexico, Florida, and Wisconsin. We used amplified fragment length polymorphism (AFLP) to compare the genetic variation and magnitude of genetic differentiation of the Wisconsin peripheral population to western core populations (Colorado, Kansas, New Mexico, and Texas). The proportion of polymorphic loci was 53.6 and 54.3, and expected heterozygosity 0.1864 and 0.1933 for the Kansas/Colorado (n = 87) and New Mexico/Texas (n = 35) regions, respectively. Specimens from Wisconsin (n = 121) had a lower proportion of polymorphic loci (38.4) and expected heterozygosity (0.1475). Genetic cluster estimation with GENELAND and F ST values showed greater genetic differentiation among the sampling locations within Wisconsin compared to core regions. Significant isolation-by-distance (IBD) was also observed in Wisconsin but not within the core regions. Lower genetic variation and increased isolation may reduce the Wisconsin population's ability to respond to change, thereby increasing their susceptibility to extinction.
FIGURES – 7. SEM images of Craspedostauros laevissimus from different populations. 42. Close up of the central area externally, showing the weakly expanded central raphe endings and the cribrate areolae with usually four to five peripheral pores and up to one central pore (sample 13). 43. Close up of the central area internally, showing the narrow stauros located in a wider hyaline area, the central raphe endings with double helictoglossa, and the rounded to rectangular areolar openings internally (sample 13). 44. Close up of the apex, showing the bent distal raphe endings, cribrate areoale with up to six peripheral pores and up to two central pores (sample 13). 45. Close ups of both the valve exterior and interior (sample 11), showing the weakly expanded central raphe endings externally; the areolae near the raphe with usually four to five peripheral pores and one central pore; the central raphe endings with double helictoglossa and the rounded areolar openings internally. 46. Internal valve view, showing the narrow transverse rib of silica at the valve center (strauros) and the central raphe endings with double helictoglossa (sample 11). 47. Close up of the apex of the same valve internally, showing the rounded to square or rectangular areolar openings (sample 11). Scale bars = 5 μm (Fig. 46); 1 μm (Figs 42–45,47). in The genus Craspedostauros E.J.Cox (Bacillariophyta) on the coasts of Livingston Island, Maritime Antarctica
FIGURES – 7. SEM images of Craspedostauros laevissimus from different populations. 42. Close up of the central area externally, showing the weakly expanded central raphe endings and the cribrate areolae with usually four to five peripheral pores and up to one central pore (sample 13). 43. Close up of the central area internally, showing the narrow stauros located in a wider hyaline area, the central raphe endings with double helictoglossa, and the rounded to rectangular areolar openings internally (sample 13). 44. Close up of the apex, showing the bent distal raphe endings, cribrate areoale with up to six peripheral pores and up to two central pores (sample 13). 45. Close ups of both the valve exterior and interior (sample 11), showing the weakly expanded central raphe endings externally; the areolae near the raphe with usually four to five peripheral pores and one central pore; the central raphe endings with double helictoglossa and the rounded areolar openings internally. 46. Internal valve view, showing the narrow transverse rib of silica at the valve center (strauros) and the central raphe endings with double helictoglossa (sample 11). 47. Close up of the apex of the same valve internally, showing the rounded to square or rectangular areolar openings (sample 11). Scale bars = 5 μm (Fig. 46); 1 μm (Figs 42–45,47).
Fig. 4.—A Bayesian cytochrome b in A precarious future for distinctive peripheral populations of meadow voles (Microtus pennsylvanicus)
Fig. 4.—A Bayesian cytochrome b (Cytb) gene tree for 50 individuals of Microtus pennsylvanicus. Colors correspond to Cytb clades depicted in Fig. 2. Posterior probability of> 0.95 are denoted by an asterisk. Four species of Microtus were used as outgroups and are shown in black (M. longicaudus, M. townsendii, M. canicaudus, and M. montanus).
Fig. 3.—A Bayesian cytochrome b in A precarious future for distinctive peripheral populations of meadow voles (Microtus pennsylvanicus)
Fig. 3.—A Bayesian cytochrome b (Cytb) gene tree for 63 species of Microtus. Posterior probability of> 0.95 are depicted by asterisk. The inset shows M. breweri nested within M. pennsylvanicus. Two species of Chionomys were used as outgroups and are shown at the bottom of the tree (C. roberti and C. nivalis).
Fig. 2 in A precarious future for distinctive peripheral populations of meadow voles (Microtus pennsylvanicus)
Fig. 2.—Distribution of Microtus pennsylvanicus (modified from IUCN) with dots representing sampling localities of specimens in Supplementary Data SD2. Colors correspond to four well-supported cytochrome b (Cytb) clades with solid lines representing hypothesized range limits of each clade.
Fig. 1 in A precarious future for distinctive peripheral populations of meadow voles (Microtus pennsylvanicus)
Fig. 1.—Distribution of subspecies of Microtus pennsylvanicus (modified from Hoffmann and Koeppl 1985) and the insular M. breweri: 1) M. p. acadicus, 2) M. p. admiraltiae, 3) M. p. alcorni, 4) M. p. aphorodemus, 5) M. p. chihuahuensis (extinct), 6) M. p. copelandi, 7) M. p. drummondii, 8) M. p. dukecampbelli, 9) M. p. enixus, 10) M. p. finitus, 11) M. p. fontigenus, 12) M. p. funebris, 13) M. p. insperatus, 14) M. p. kincaidi, 15) M. p. labradorius, 16) M. p. magdalenensis, 17) M. p. microcephalus, 18) M. p. modestus, 19) M. p. nesophilus (extinct), 20) M. p. nigrans, 21) M. p. pennsylvanicus, 22) M. p. provectus, 23) M. p. pullatus, 24) M. p. rubidus, 25) M. p. shattucki, 26) M. p. tananaensis, 27) M. p. terraenovae, 28) M. p. uligocola, and 29) M. breweri.
Peripheral Mononuclear Cells to Screen, Monitor and Stratify the Population at Risk of Osteoporosis and Fractures
ClinicalTrials.gov study NCT06551155. IPD Sharing: UNDECIDED. Countries: 1. Publications: 5.
Incidence of Complications of Peripheral Venous Access in the Type 2 Diabetic Population
ClinicalTrials.gov study NCT04499638. IPD Sharing: Not stated. Countries: 1. Publications: 22.
A Study to Assess the Engagement and Usefulness of Care4Today Digital Platform for Disease Management in Coronary Artery Disease (CAD) and/or Peripheral Artery Disease (PAD) Population
ClinicalTrials.gov study NCT06052319. IPD Sharing: NO. Countries: 1. Publications: 1.
Data from: Implications of isolation and low genetic diversity in peripheral populations of an amphi-Atlantic coral
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Data from: Genetic population structure of the blister beetle Gnathium minimum: core and peripheral populations
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Data from: Effect of habitat fragmentation on the genetic diversity of peripheral populations of beech in Central Italy
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Data from: Evidence of genetic erosion in a peripheral population of a North American game bird: the Montezuma quail (Cyrtonyx montezumae)
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Data from: Variation in fine-scale genetic structure and local dispersal patterns between peripheral populations of a South American passerine bird
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Data from: Ecological niche differentiation in peripheral populations: a comparative analysis of eleven Mediterranean plant species
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Genetic structure and dispersal in peripheral populations of a marine fish (Pacific cod, Gadus macrocephalus) and their importance for adaptation to climate change
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Data from: Repeated jumps from Northwest Africa to the European continent: the case of peripheral populations of an annual plant
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Data from: Critically endangered island endemic or peripheral population of a widespread species? Conservation genetics of Kikuchi’s gecko and the global challenge of protecting peripheral oceanic island endemic vertebrates
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Data and code from: Landscape-driven isolation among, but high genetic diversity within, peripheral populations of a threatened frog
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Allen Brain Atlas
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.