Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
203
datasets available to search
ShareScore release 0.9.0
Dataset results
203 results for “Bird Island”
Data from: Partial support for the central–marginal hypothesis within a population: reduced genetic diversity but not increased differentiation at the range edge of an island endemic bird
Large-scale population comparisons have contributed to our understanding of the evolution of geographic range limits and species boundaries, as well as the conservation value of populations at range margins. The central–marginal hypothesis (CMH) predicts a decline in genetic diversity and an increase in genetic differentiation toward the periphery of species' ranges due to spatial variation in genetic drift and gene flow. Empirical studies on a diverse array of taxa have demonstrated support for the CMH. However, nearly all such studies come from widely distributed species, and have not considered if the same processes can be scaled down to single populations. Here, we test the CMH on a species composed of a single population: the Island Scrub-Jay (Aphelocoma insularis), endemic to a 250 km2 island. We examined microsatellite data from a quarter of the total population and found that homozygosity increased toward the island's periphery. However, peripheral portions of the island did not exhibit higher genetic differentiation. Simulations revealed that highly localized dispersal and small total population size, but not spatial variation in population density, were critical for generating fine-scale variation in homozygosity. Collectively, these results demonstrate that microevolutionary processes driving spatial variation in genetic diversity among populations can also be important for generating spatial variation in genetic diversity within populations.
XFP-056 Bird Sternum Amulet, Sanak Island, Ak.
Bird Sternum Amulet or pendant, Sanak Island, Alaska. CAT # XFP-056-4-4 XFP-056 is a group of large house depressions on the south shore of Pauloff Harbor, Sanak Island, Alaska. Multiple radiocarbon dates place it from 300 CE to 800 CE, although the upper most levels may date to the 13th century. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
XFP-053 Bird bone awl, Sanak Island, Alaska.
Bird bone awl, Sanak Island, Alaska. CAT# XFP-053-6 XFP-053 is a fortified village on a former sea stack, located in Sandy Bay on the south side of Sanak Island. It dates between 1100 and 1400 CE, a period when warfare is common in the region. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
XFP-052 Bird Bone Awl, Sanak Island, Alaska
Bird Bone Awl, Sanak Island, Alaska. CAT# XFP-052-11 XFP-052 is a late prehistoric and early Historic site on Sanak Island, Alaska. It dates 1600-1800 CE. The site is heavily eroded. These artifacts were scanned with either a Faro Edge Arm or a Minolta 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation. Source: Objaverse 1.0 / Sketchfab
XFP-056 Bird bone awl, Sanak Island, Alaska.
Bird bone awl, Sanak Island, Alaska. CAT# XFP-056-34 XFP-056 is a group of large house depressions on the south shore of Pauloff Harbor, Sanak Island, Alaska. Multiple radiocarbon dates place it from 300 CE to 800 CE, although the upper most levels may date to the 13th century. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
XFP-056 Bird bone awl, Sanak Island, Alaska
Bird bone awl, Sanak Island, Alaska. CAT# XFP-056-4-5 XFP-056 is a group of large house depressions on the south shore of Pauloff Harbor, Sanak Island, Alaska. Multiple radiocarbon dates place it from 300 CE to 800 CE, although the upper most levels may date to the 13th century. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
XFP-062 Bird bone awl, Sanak Island, Alaska
Bird bone awl, Sanak Island, Alaska. CAT#XFP-062-16 XFP-062 is a small group of seven early house depressions dating between 1400 and 1200 BCE. It is located in Unimak cove on the north side of Sanak Island. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
Data from: The importance of migratory drop-off for island colonization in birds
<p>Seasonal migration is an underappreciated driver of animal diversification. Changes in migratory behavior may favor the establishment of sedentary founder populations and promote speciation if there is sufficient reproductive isolation between sedentary and migratory populations. From a systematic literature review, we here quantify the role of migratory drop-off – the loss of migratory behavior – in promoting speciation in birds on islands. We identify at least 157 independent colonization events likely initiated by migratory species that led to speciation, including 44 cases among recently extinct species. By comparing, for all islands, the proportion of island endemic species that derived from migratory drop-off with the proportion of migratory species among potential colonizers, we showed that seasonal migration has a larger effect on island endemic richness than direct dispersal. We also found that the role of migration in island colonization increases with the geographic isolation of islands. Furthermore, the success of speciation events depends in part on species biogeographic and ecological factors, here positively associated with greater range size and larger flock sizes. These results highlight the importance of shifts in migratory behavior in speciation process and calls for greater consideration of migratory drop-off in the biogeographic distribution of birds.</p>
Data from: The fifth review of Birds of Conservation Concern in the United Kingdom, Channel Islands and Isle of Man and second IUCN Red List assessment of extinction risk of birds for Great Britain
<p>The fifth review of <i>Birds of Conservation Concern</i> (<i>BoCC5</i>) in the UK, Channel Islands and Isle of Man assessed and assigned 245 species to updated Red, Amber and Green lists of conservation concern and showed a continuing decline in the status of our bird populations. In total, 70 species (29% of those assessed) are now on the Red list, up from 36 species in the first review in 1996. Since the last review, in 2015, Golden Oriole <i>Oriolus oriolus</i> has been lost as a breeding species. Eleven species have been moved to the Red list, while only six species moved from Red to Amber. Newly Red-listed species include Common Swift <i>Apus apus</i>, Common House Martin <i>Delichon urbicum</i>, Greenfinch <i>Chloris chloris</i> and the globally threatened Leach's Storm-petrel <i>Hydrobates leucorhous</i>. There has been no improvement in the overall status of species associated with farmland and upland, or Afro-Palearctic migrants; indeed, more such species have been Red-listed. Concerns over the status of our wintering wildfowl and wader populations have also increased. As a direct result of targeted conservation action, White-tailed Eagle <i>Haliaeetus albicilla</i> moves from Red to Amber.</p> <p>We also present a review of the separate, and distinct, second IUCN Regional Red List assessment of extinction risk for Great Britain, which show that 46% of 235 regularly occurring species, and 43% of 285 separate breeding and non-breeding populations, are assessed as being threatened with extinction from Great Britain.</p>
Data from: Ecological and environmental predictors of escape among birds on a large tropical island
<p><span><span><span><span>Ecological and environmental traits can influence avian escape behaviour but most data underpinning our current understanding relates to continental and temperate areas and species. We conducted a phylogenetically controlled comparative analysis of flight-initation distance (FID) against a variety of environmental, behavioural and life-history attributes for Sri Lankan birds (202 species; n = 2540). As with other studies, body mass was positively associated with FID, and longer FIDs occurred in areas where human population density was lower. We also found that the effect of human population density was more pronounced in larger birds. Birds that were in groups when approached tended to have longer FIDs. Unlike the findings of other comparative analyses, based mostly on continental, temperate populations, most other ecological variables did not feature in the best models predicting FID (time of year, breeding system, clutch size, habitat, migratory behaviour, development [altricial/precocial], elevation and diet). Thus, some associations (body mass and exposure to humans) may be universal, while others may not manifest themselves among tropical avifaunas. Further tropical datasets are required to confirm truly universal associations of environmental and ecological attributes and escape distances among birds.</span></span></span></span></p>
Distribution. New Guinea Mts, from Arfak Mts in Bird's Head (= Vogelkop) Peninsula in the W, through Central Range, including Huon Peninsula, to the extreme SE of the island. in Petauridae
Distribution. New Guinea Mts, from Arfak Mts in Bird's Head (= Vogelkop) Peninsula in the W, through Central Range, including Huon Peninsula, to the extreme SE of the island.
Distribution. Known from scattered localities in New Guinea, including the Central Range from Taritatu River E to Mt Dayman and the Torricelli Mts; possibly present across entire island of New Guinea in preferred habitat. It was found in Pleistocene archaeological sites on the Ayamaru Plateau, C Bird's Head (= Vogelkop), NW New Guinea. in Muridae
Distribution. Known from scattered localities in New Guinea, including the Central Range from Taritatu River E to Mt Dayman and the Torricelli Mts; possibly present across entire island of New Guinea in preferred habitat. It was found in Pleistocene archaeological sites on the Ayamaru Plateau, C Bird's Head (= Vogelkop), NW New Guinea.
Seasonal species richness of birds on the world's islands and its geographical correlates
<p>Migratory birds occur on islands during different seasons of the year, which results in seasonal variation in species richness. These patterns and their geographical correlates have not been examined. We used 20 years of bird observations on 690 islands to examine how seasonal species richness estimates vary as a function of island area, isolation, and latitude. Species richness was highest on islands within the mid-latitudes of the Northern Hemisphere during migration and on islands within tropical latitudes during the non-breeding season. Area defined positive, non-linear relationships with species richness across seasons, with the steepest slopes occurring with islands >1,100 km<sup>2</sup>. Distance to mainland defined negative, non-linear relationships with species richness across seasons, with the strongest slopes occurring with islands located >150 km from the mainland. Species-area relationships were weakest for the most remote islands and strongest for islands at intermediate distances to the mainland. Intermediate proximity to other islands was a poor predictor of species richness. Our findings emphasize the presence of seasonally dynamic relationships, the enhanced role of evolutionary processes on larger islands, the unique ecology of the world's most remote islands, and the importance of islands as stopover sites and wintering grounds for migratory bird species.</p>
XFP-058 Carved Bird Sternum, Sanak Island, AK
Carved Bird Sternum, Perhaps a cup. Sanak Island, Alaska. XFP-058-28 XFP-058 small site on the west shore of Pauloff Harbor, Sanak Island, Alaska. It is a heavily disturbed shell midden with a few small house depressions. It dates approximately 200 BCE to 50 CE. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in Geomagic Wrap. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
XFP-031 Bird Bone Awl, Sanak Island, Alaska
Bird Bone Awl, Sanak Island, Alaska. Cat# XFP-031-2 XFP-031 is a group of house depressions on the north shore of Sanak Island, Alaska. Multiple radiocarbon dates place it from 350 BCE to 100 BCE, placing it in the Adamagan Phase of the Alaska Peninsula. These artifacts were scanned with either a Faro Edge Arm or a Minolta 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation. Source: Objaverse 1.0 / Sketchfab
XFP-031 Bird Bone Tool, Sanak Island, Alaska
Tool made of bird bone, Sanak Island, Alaska. Cat# XFP-031-113. XFP-031 is a group of house depressions on the north shore of Sanak Island, Alaska. Multiple radiocarbon dates place it from 350 BCE to 100 BCE, placing it in the Adamagan Phase of the Alaska Peninsula. These artifacts were scanned with either a Faro Edge Arm or a Minolta 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
XFP-056 Bird bone awl, Sanak Island, Alaska.
Bird bone awl, Sanak Island, Alaska. CAT# XFP-056-11-1 XFP-056 is a group of large house depressions on the south shore of Pauloff Harbor, Sanak Island, Alaska. Multiple radiocarbon dates place it from 300 CE to 800 CE, although the upper most levels may date to the 13th century. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
XFP-056 Bird bone awl, Sanak Island, Alaska
Bird bone awl, Sanak Island, Alaska. CAT# XFP-056-1 XFP-056 is a group of large house depressions on the south shore of Pauloff Harbor, Sanak Island, Alaska. Multiple radiocarbon dates place it from 300 CE to 800 CE, although the upper most levels may date to the 13th century. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
XFP-050 Bird Bone Pin, Sanak Island, Alaska
Bird Bone Cloak Pin or awl, Sanak Island, Alaska. XFP-050-4 XFP-050 is a late prehistoric and early Historic site in Dodds Bay on Sanak Island, Alaska. It dates 1400-1600 CE. There are 21 house and other depressions at this village. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 4-8 photos were used for texture in ZBrush. The Sanak Island artifacts are presented as a result of the research conducted under grants NSF 0326584, NSF 0508101, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Fieldwork and analysis done with the permission and collaboration of the Pauloff Harbor Tribe and the Sanak Corporation Source: Objaverse 1.0 / Sketchfab
Data from: Reproductive isolation and cryptic introgression in a sky island enclave of Appalachian birds
Reproductive isolation is central to the speciation process, and cases where the strength of reproductive isolation varies geographically can inform our understanding of speciation mechanisms. Although generally treated as separate species, Black-capped chickadees (Poecile atricapillus) and Carolina chickadees (P. carolinensis) hybridize and undergo genetic introgression in many areas where they come into contact across the eastern United States and in the northern Appalachian Mountains. The Great Smoky Mountains harbor the last large breeding population of atricapillus in the southern Appalachians, isolated from the species' main range by nearly 200 km. This population is believed to be reproductively isolated from local carolinensis due to an unusual, behaviorally mediated elevational range gap, which forms during the breeding season and may function as an incipient reproductive isolating mechanism. We examined the effectiveness of this putative isolating mechanism by looking for genetic introgression from carolinensis in Great Smoky Mountain atricapillus. We characterized this population and parental controls genetically using hundreds of amplified fragment length polymorphism (AFLP) loci as well as mitochondrial DNA (mtDNA) sequence data from cytochrome-b. Great Smoky Mountain atricapillus have experienced nuclear genetic introgression from carolinensis, but at much lower levels than other populations near the hybrid zone to the north. No mitochondrial introgression was detected, in contrast to northern contact areas. Thus, the seasonal elevational range gap appears to have been effective in reducing gene flow between these closely related taxa.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.