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611 results for “eastern North America”
Data from: Genome-wide evidence of environmentally mediated secondary contact of European green crab (Carcinus maenas) lineages in eastern North America
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Data from: Effects of climate and topography on the diversity anomaly of plants disjunctly distributed in eastern Asia and eastern North America
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Critical seed transfer distances for selected tree species in eastern North America
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Carpophiline-ID: An interactive matrix-based key to the carpophiline sap beetles (Coleoptera, Nitidulidae) of Eastern North America
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Data from: Herbivory and pollen limitation at the upper elevational range limit of two forest understory plants of eastern North America
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Data on long-term demographic information for Alliaria petiolata in eastern North America
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Data from: Allopatric speciation in Asia contributed to the diversity anomaly between eastern Asia and eastern North America: evidence from anchored phylogenomics of Stewartia (Theaceae)
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Genetic diversity and population structure in Vitis species illustrate phylogeographic patterns in eastern North America
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Data from: Sticta deyana: a new endemic photomorphic lichen from the imperiled Mid-Atlantic Coastal Plain of eastern North America
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Figure 3 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus
Figure 3 Caleremaeus retractus(Banks), transmitted-light micrographs of near-topotypical adults: A – anterior region of separated notogaster; B – right sejugal region, dorsal view; C – same, different specimen; D – notogastral setae, as labeled; E – adanal region and anal plate (no setae in focus); F – partial venter (setae seen only as alveolus due to focus limitations); G – rostrum and subcapitulum, ventral view; H – preanal organ and associated muscles (no clearing); I – two variants of same, with strong clearing; J – sagittal section of posterior hysterosoma. Scale bars: 20 µm (F); 10 µm (A-C, E, G, J); 5 µm (H, I); 2 µm (D).
Data from: Sex ratio and gamete size across eastern North America in Dictyostelium discoideum, a social amoeba with three sexes
Theory indicates that numbers of mating types should tend towards infinity or remain at two. The social amoeba, Dictyostelium discoideum, however, has three mating types. It is therefore a mystery how this species has broken the threshold of two mating types, but has not increased towards a much higher number. Frequency dependent selection on rare types in combination with isogamy, a form of reproduction involving gametes similar in size, could explain the evolution of multiple mating types in this system. Other factors, such as drift, may be preventing the evolution of more than three. We first looked for evidence of isogamy by measuring gamete size associated with each type. We found no evidence of size dissimilarities between gametes. We then looked for evidence of balancing selection, by examining mating type distributions in natural populations and comparing genetic differentiation at the mating type locus to that at more neutral loci. We found that mating type frequency varied among the three populations we examined, with only one of the three showing an even sex ratio, which does not support balancing selection. However, we found more population structure at neutral loci than the mating type locus, suggesting that the three mating types are indeed maintained at intermediate frequencies by balancing selection. Overall, the data are consistent with balancing selection acting on D. discoideum mating types, but with a sufficiently weak rare sex advantage to allow for drift, a potential explanation for why these amoebae have only three mating types.
Data from: Ungulate predation and ecological roles of wolves and coyotes in eastern North America
Understanding the ecological roles of species that influence ecosystem processes is a central goal of ecology and conservation biology. Eastern coyotes (Canis latrans) have ascended to the role of apex predator across much of eastern North America since the extirpation of wolves (Canis spp.) and there has been considerable confusion regarding their ability to prey on ungulates and their ecological niche relative to wolves. Eastern wolves (C. lycaon) are thought to have been the historical top predator in eastern deciduous forests and have previously been characterized as deer specialists that are inefficient predators of moose because of their smaller size relative to gray wolves (C. lupus). We investigated intrinsic and extrinsic influences on per capita kill rates of white-tailed deer (Odocoileus virginianus) and moose (Alces alces) during winter by sympatric packs of eastern coyotes, eastern wolves, and admixed canids in Ontario, Canada to clarify the predatory ability and ecological roles of the different canid top predators of eastern North America. Eastern coyote ancestry within packs negatively influenced per capita total ungulate (deer and moose combined) and moose kill rates. Furthermore, canids in packs dominated by eastern coyote ancestry consumed significantly less ungulate biomass and more anthropogenic food than packs dominated by wolf ancestry. Similar to gray wolves in previous studies, eastern wolves preyed on deer where they were available. However, in areas were deer were scarce, eastern wolves killed moose at rates similar to those previously documented for gray wolves at comparable moose densities across North America. Eastern coyotes are effective deer predators, but their dietary flexibility and low kill rates on moose suggest they have not replaced the ecological role of wolves in eastern North America.
FIGURE 19 in Revision and reclassification of <i>Lasioglossum</i> (<i>Evylaeus</i>), <i>L.</i> (<i>Hemihalictus</i>) and <i>L.</i> (<i>Sphecodogastra</i>) in eastern North America (Hymenoptera: Apoidea: Halictidae)
FIGURE 19. Lateral habitus of male Lasioglossum (Hemihalictus) foxii (Robertson). Scale bar = 1 mm.
FIGURE 41 in Revision and reclassification of <i>Lasioglossum</i> (<i>Evylaeus</i>), <i>L.</i> (<i>Hemihalictus</i>) and <i>L.</i> (<i>Sphecodogastra</i>) in eastern North America (Hymenoptera: Apoidea: Halictidae)
FIGURE 41. Lateral habitus of male Lasioglossum (Hemihalictus) swenki (Crawford). Scale bar = 1 mm.
FIGURE 34 in Revision and reclassification of <i>Lasioglossum</i> (<i>Evylaeus</i>), <i>L.</i> (<i>Hemihalictus</i>) and <i>L.</i> (<i>Sphecodogastra</i>) in eastern North America (Hymenoptera: Apoidea: Halictidae)
FIGURE 34. Lateral habitus of male Lasioglossum (Hemihalictus) pectorale (Smith). Scale bar = 1 mm.
FIGURE 226 in Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini)
FIGURE 226. Lasioglossum wheeleri (Mitchell) male terminalia, ventral view. Scale bar = 0.5 mm.
FIGURE 225 in Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini)
FIGURE 225. Lasioglossum wheeleri (Mitchell) male, dorsal view of mesosoma.
FIGURE 223 in Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini)
FIGURE 223. Distribution map of Lasioglossum trigeminum (circles) and L. wheeleri (star).
FIGURE 221 in Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini)
FIGURE 221. Lasioglossum trigeminum Gibbs male, dorsal view of mesosoma.
FIGURE 220 in Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini)
FIGURE 220. Lasioglossum trigeminum Gibbs male, (A) lateral habitus, (B) face. Scale bars = 1 mm.
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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.