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375 results for “island population”
Data from: The relative roles of cultural drift and acoustic adaptation in shaping syllable repertoires of island bird populations change with time since colonization
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Data from: Spatial variation in herbivory, climate and isolation predict plant height and fruit phenotype in Plectritis congesta island populations
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Data from: Spatial and ecological population genetic structures within two island-endemic Aeonium species of different niche width
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Data from: Small N e of the isolated and unmanaged horse population on Sable Island
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Data from: Population genomics of Sitka black-tailed deer supports invasive species management and ecological restoration on islands
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Comparison of adult census size and effective population size support the need for continued protection of two Solomon Island endemics
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Data from: Sex-linked and autosomal microsatellites provide new insights into island populations of the tammar wallaby
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Data from: "Transcriptomic resources for three populations of Conus miliaris (Mollusca: Conidae) from Easter Island, American Samoa and Guam" in Genomic Resources Notes Accepted 1 August 2014-30 September 2014
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Data from: Rewriting the history of an extinction - was a population of Steller's sea cows (Hydrodamalis gigas) at St. Lawrence Island also driven to extinction?
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Data from: Breeding relationships in Macaronesian Tolpis (Asteraceae-Cichorieae): F1 hybrid pollen fertility within and among populations from the Azores, Canary Islands and Madeira
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Population structure of Rosa spinosissima L. on the Frisian Islands and introgression from cultivated material
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Data from: Pleistocene island connectivity did not enhance dispersal or impact population size change in Galápagos geckos
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Mixed mating in a multi-origin population suggests high potential for genetic rescue in North Island brown kiwi, Apteryx mantelli
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FIG. 9 in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 9. — Fossil and modern occurrences of the three dipsadid species identified on the Guadeloupe Islands at the different chronological intervals.
FIG. 5 in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 5. — Trunk vertebrae of Alsophis antillensis (Schlegel, 1837) from Gare Maritime de Basse-Terre archaeological site (US 1008) located on Basse-Terre Island (A) and from Blanchard Cave paleontological deposit (Layer 11) located on Marie-Galante Island (B). Abbreviations: cd., condyle; ct., cotyle; di., diapophysis; e. s., epizygapophyseal spine; h. k., hemal keel; m. c., medial constriction; n. s., neural spine; p. c., precondylar constriction; p. d., paracotylar depression; p. n., postero-medial notch of the zygantrum; pa., parapophysis; pz. f., prezygapophyseal facet; pz. p., prezygapophyseal process; s. d., subcentral depression; s. r., subcentral ridge; s. t., sub-cotylar tubercle; zs., zygosphene. Scale bars: 4 mm.
FIG. 3 in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 3. — Measurements taken of snake vertebrae: CL, greatest centrum length; GH, greatest height of the vertebra; LNS, greatest length of the neural spine; MLV, maximum length of vertebra; PRW, prezygapophyseal width; WIC, width of interzygapophyseal constriction (= NAW sensu Szyndlar 1984); Wa, greatest width of the anterior part of the neural arch; Wp, greatest width of the posterior part of the neural arch (= PO-PO sensu Szyndlar 1984).
FIG. 8 in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 8. — Distribution of size (centrum length) of snake vertebrae from archaeological deposits (A) and natural deposits (B) on the Guadeloupe Islands.
FIG. 1. — A in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 1. — A, Map of the Lesser Antilles indicating the position of the Guadeloupe archipelago; B, Map of the Guadeloupe Islands with isobaths (–200 m) from Münch et al. (2013) and locations of the studied sites: 1, cathédrale de Basse-Terre; 2, gare maritime de Basse-Terre; 3, Sainte-Rose la Ramée; 4,Trou Lolo; 5, Anse à l'Écu cave; 6, Bambous cave; 7, Morel; 8, Anse à la Gourde cave; 9, Anse à la Gourde; 10, Pointe du Helleux; 11, Anse Petite Rivière;12, Pointe Gros Rempart 6; 13, Caille à Bélasse; 14, Jean-François gully cave;15, Morne Rita;16, Tourlourous – Stade José Bade; 17, Blanchard cave; 18, Cadet 2 cave;19, Cadet 3 shelter;20, Grande-Anse de Terre de Bas.
The many population genetic and demographic routes to islands of genomic divergence
<ol> <li>The way that organisms diverge into reproductively isolated species is a major question in biology. The recent accumulation of genomic data provides promising opportunities to understand the genomic landscape of divergence, which describes the distribution of differences across genomes. Genomic areas of unusually high differentiation have been called genomic islands of divergence. Their formation has been attributed to a variety of mechanisms, but a prominent hypothesis is that they result from divergent selection over a small portion of the genome, with surrounding areas homogenised by gene flow. Such islands have often been interpreted as being associated with divergence with gene flow. However other mechanisms related to genomic structure and population history can also contribute to the formation of genomic islands of divergence.</li> <li>We currently lack a quantitative framework to examine the dynamics of genomic landscapes under the complex and nuanced conditions that are found in natural systems. Here, we develop an individual-based simulation to explore the dynamics of diverging genomes under various scenarios of gene flow, selection and genotype-phenotype maps.</li> <li>Our modelling results are consistent with empirical observations demonstrating the formation of genomic islands under genetic isolation. Importantly, we have quantified the range of conditions that produce genomic islands. We demonstrate that the initial level of genetic diversity, drift, time since divergence, linkage disequilibrium, strength of selection and gene flow are all important factors that can influence the formation of genomic islands. Because the accumulation of genomic differentiation over time tends to erode the signal of genomic islands, genomic islands are more likely to be observed in recently divergent taxa, although not all recently diverged taxa will necessarily exhibit islands of genomic divergence. Gene flow primarily slows the swamping of islands of divergence with time.</li> <li>By using this framework, further studies may explore the relative influence of particular suites of events that contribute to the emergence of genomic islands under sympatric, parapatric and allopatric conditions. This approach represents a novel tool to explore quantitative expectations of the speciation process, and should prove useful in elucidating past and projecting future genomic evolution of any taxa.</li> </ol>
Patterns of genetic divergence and demographic history shed light on island-mainland population dynamics and melanic plumage evolution in the white-winged fairywren
<p>The existence of distinct traits in island versus mainland populations offers opportunities to gain insights into how eco-evolutionary processes operate under natural conditions. We used two island colonization events in the white-winged fairywren (<i>Malurus </i><i>leucopterus</i>) to investigate the genomic and demographic origin of melanic plumage. This avian species is distributed across most of Australia, and males of the mainland subspecies (<i>M. l. leuconotus</i>) exhibit a blue nuptial plumage in contrast to males of two island subspecies – <i>M. l. leucopterus </i>on Dirk Hartog Island<i> </i>and <i>M. l. edouardi</i>on Barrow Island – that exhibit a black nuptial plumage. We used reduced-representation sequencing to explore differentiation and demographic history in this species and found clear patterns of divergence between mainland and island populations, with additional substructuring on the mainland. Divergence between the mainland and Dirk Hartog was approximately 10 times more recent than the split between the mainland and Barrow Island, supporting two independent colonizations. In both cases, estimated gene flow between the mainland and the islands was low, contributing to signals of divergence among subspecies. Our results present demographic reconstructions of mainland-island dynamics and associated plumage variation in white-winged fairywrens, with broader implications regarding our understanding of convergent evolution in insular populations.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.