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285 results for “hummingbird”
Data from: A few essential genetic loci distinguish Penstemon species with flowers adapted to pollination by bees or hummingbirds
<p>In the formation of species, adaptation by natural selection generates distinct combinations of traits that function well together. The maintenance of adaptive trait combinations in the face of gene flow depends on the strength and nature of selection acting on the underlying genetic loci. Floral pollination syndromes exemplify the evolution of trait combinations adaptive for particular pollinators. The North American wildflower genus <em>Penstemon</em> displays remarkable floral syndrome convergence, with at least 20 separate lineages that have evolved from ancestral bee pollination syndrome (wide blue-purple flowers that present a landing platform for bees and small amounts of nectar) to hummingbird pollination syndrome (bright red narrowly tubular flowers offering copious nectar). Related taxa that differ in floral syndrome offer an attractive opportunity to examine the genomic basis of complex trait divergence. In this study, we characterized genomic divergence among 229 individuals from a <em>Penstemon </em>species complex that includes both bee and hummingbird floral syndromes. Field plants are easily classified into species based on phenotypic differences and hybrids displaying intermediate floral syndromes are rare. Despite unambiguous phenotypic differences, genomewide differentiation between species is minimal. Hummingbird-adapted populations are more genetically similar to nearby bee-adapted populations than to geographically distant hummingbird-adapted populations, in terms of genomewide <em>d<sub>XY</sub>.</em> However, a small number of genetic loci are strongly differentiated between species. These ~ 20 "species-diagnostic loci", which appear to have nearly fixed differences between pollination syndromes, are sprinkled throughout the genome in high recombination regions. Several map closely to previously established floral trait QTLs. The striking difference between the diagnostic loci and the genome as whole suggests strong selection to maintain distinct combinations of traits, but with sufficient gene flow to homogenize the genomic background. A surprisingly small number of alleles confer phenotypic differences that form the basis of species identity in this species complex.</p>
Anna's hummingbird microbiome analysis
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Hummingbird Plumage Color Diversity Exceeds the Gamut of all other Birds
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Data from: Extreme elevational migration spurred cryptic speciation in giant hummingbirds
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Data for: The genetic basis of floral mechanical isolation between two hummingbird-pollinated Neotropical understory herbs
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Data for: Sampling affects population genetic inference: a case study of the Allen's (Selasphorus sasin) and rufous hummingbird (Selasphorus rufus) (Part 1/2)
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Data for: Sampling affects population genetic inference: a case study of the Allen's (Selasphorus sasin) and rufous hummingbird (Selasphorus rufus) (Part 2/2)
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Plant-hummingbird interactions in the Atlantic Forest: Current and future projections
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Hummingbird blood traits track oxygen availability across space and time
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Quantifying phenology and migratory behaviours of hummingbirds using single-site dynamics and mark-detection analyses
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Data from: Reversal of the adipostat control of torpor during migration in hummingbirds
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Interspecific hybridization explains rapid gorget color divergence in Heliodoxa hummingbirds (Aves: Trochilidae)
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Adaptation to lower latitudes and lower elevations precedes the evolution of hummingbird pollination in western North American Penstemon
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A lightweight backpack harness for tracking hummingbirds
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Data from: The evolution of the traplining pollinator role in hummingbirds, specialization is not an evolutionary dead end
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Data from: Niche packing, but not niche expansion, explains the co-occurrence of hummingbirds-visited plants
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Hummingbirds use compensatory eye movements to stabilize both rotational and translational visual motion
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Data from: A few essential genetic loci distinguish Penstemon species with flowers adapted to pollination by bees or hummingbirds
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Evolutionary convergence on hummingbird pollination in Neotropical Costus provide insight into the causes of pollinator shifts
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Data from: Floral isolation and pollination in two hummingbird-pollinated heliconias data
Differences in feeding performance and aggressive abilities between species and sexes of hummingbirds are often associated with the partitioning of their food sources, but whether such partitioning results in floral isolation (reproductive isolation at the stage of pollination) has received little attention. We examined components of floral isolation and pollinator effectiveness of Heliconia caribaea and H. bihai on the island of Dominica, West Indies. The short flowers of H. caribaea match the short bills of male Anthracothorax jugularis, its primary pollinator, whereas the long flowers of H. bihai match the long bills of female A. jugularis, its primary pollinator. In pollination experiments, both sexes of A. jugularis were equally effective at pollinating the short flowers of H. caribaea, which they preferred to H. bihai, whereas females were more effective at pollinating the long flowers of H. bihai. Moreover, an average difference in length of 12 mm between H. caribaea and H. bihai flowers did not prevent heterospecific pollen transfer, and both sexes transported pollen between the two plant species. In field studies using powdered dyes as pollen analogs, however, heterospecific pollen transfer was minimal, with only 2 of 168 flowers receiving dye from the other species. The length of H. bihai flowers acted as an exploitation barrier to male A. jugularis, which were unable to completely remove nectar from 88% of the flowers they visited. In contrast, interference competition combined with high floral fidelity through traplining prevented female A. jugularis from transferring pollen between the two Heliconia species. A combination of exploitation barriers, interference and exploitative competition, and pollinator preferences maintains floral isolation between these heliconias, and may have contributed to the evolution of this hummingbird-plant system.
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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.