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984 results for “migratory”
Data for: Early life conditions influence fledging success and subsequent local recruitment rates in a declining migratory songbird, the Whinchat Saxicola rubetra
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Data from: Morphological traits are not consistently related to population size in four migratory caribou populations across North America
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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: Host plants and experimental warming impact fitness and infection outcomes in a migratory butterfly
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Data from: Early-life variation in migration is subject to strong fluctuating survival selection in a partially migratory bird
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Data from: Spatial consistency in drivers of population dynamics of a declining migratory bird
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Male song structure predicts offspring recruitment to the breeding population in a migratory bird
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Data and R computer code from: Summer elk calf survival in a partially migratory population
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Insights into natal origins of migratory Nearctic hover flies (Diptera: Syrphidae): New evidence from stable isotope (δ2H) assignment analyses
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Data from: Habitat conditions during winter explain movement among subpopulations of a declining migratory bird
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Data from: Genomics-informed conservation units reveal spatial variation in climate vulnerability in a migratory bird
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Data from: Evidence for seasonal compensation of hunting mortalities in a long-lived migratory bird
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Data from: Fencing amplifies individual differences in movement with implications on survival for two migratory ungulates
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A migratory sparrow has personality in winter that is independent of other traits
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Trace Element Concentrations in Feathers of Migratory Birds from the Southern Caspian Sea Region, 2013
This dataset presents concentrations of eight trace elements—arsenic (As), cadmium (Cd), chromium (Cr), iron (Fe), manganese (Mn), nickel (Ni), lead (Pb), and zinc (Zn)—measured in secondary flight feathers of waterbird species wintering along the southern Caspian Sea coast of Iran. Samples were collected in February 2013 from multiple species representing diverse feeding guilds and avian families. The data support ecological assessments of contaminant exposure in migratory birds and provide insight into trophic-level accumulation patterns. Elemental analysis was performed using standardized laboratory protocols, and values are reported in micrograms per gram dry weight (µg/g dw). This dataset contributes to regional biomonitoring efforts and can be used for comparative studies in avian ecotoxicology and environmental risk assessment.
Data for: Does migration distance influence intra-individual variation in migratory behaviour in a seabird species with diverse migration strategies?
<p>GPS tracking data from adult lesser black-backed gulls (<em>L. fuscus) </em>with 2 – 7 years of tracking data per individual from several colonies in the Netherlands, Belgium and the UK. This data has gone through initial cleaning to remove faulty GPS locations was combined with meta data from colonies to create a single .RDS file. </p> <p>Result for the manuscript "High repeatability in migratory behaviours in a generalist seabird regardless of migration strategy" can be obtained from this data using the R scripts at https://github.com/jbrow247/LBBG_MigrationPlasticity_Pub. </p>
Data from: Hidden leks in a migratory songbird: mating advantages for earlier and more attractive males
In some socially monogamous birds, territories sometimes occur in aggregations. The "hidden lek" hypothesis suggests that territorial aggregations might be explained by males establishing territories near successful males ("hotshot" model), or by females preferring to mate in large clusters ("female preference" model). In both scenarios, clusters would provide more opportunities for finding mates and achieving extra-pair copulations. Our study tests predictions of these two models in the blue-black grassquit (Volatinia jacarina). Males of this species migrate to their breeding grounds, establish territories within clusters and initiate courtship displays. These displays consist of vertical leaps synchronized with vocalizations, or only the latter, without leaps. The "hotshot" model predicts that: 1) earlier-arriving males would establish territories more centrally within clusters; 2) earlier or centrally positioned males would produce more elaborate displays; and 3) these same males would achieve higher success via within and extrapair fertilizations. The "female preference" model predicts that: 4) pairing success and 5) per-capita extrapair fertilizations would increase with cluster size. We found that earlier-arriving males executed higher leaps and longer songs, but there was no relationship between these traits and male position within clusters. We also found earlier-arriving males were more likely to obtain extrapair fertilizations. However, we found little evidence that cluster size related to overall or per-capita breeding success. Considered together, our data provide partial validation of the hotshot model of hidden leks, and expand on prior findings in this species by showing that females benefit by choosing males leaping higher and settling earlier in clusters.
Community-level reorganizations following migratory pollinator dynamics along a latitudinal gradient
Predicting how communities re-arrange in response to changes in species composition remains a key challenge in ecology. Migratory species, which enter and leave communities across latitudinal gradients, offer us a unique opportunity to evaluate community and species-level responses to a shift in community composition. We focused on a migratory hummingbird and the communities that host it along a latitudinal and species diversity gradient. Our results show higher niche overlap in more diverse communities, allowing resident species to compensate for the loss of the migrant in providing pollination services. Contrastingly, in less diverse communities, the migrant behaves as a specialist, monopolizing abundant resources. In its absence, its role is not fully covered by resident species, resulting in a decrease in the fruit set of the migrant´s preferred plant species. These results help us understand the potential impacts of biodiversity loss and have important implications for community persistence given expected changes in the migratory behaviors of some species.
Data from: Using molecular and crowd-sourcing methods to assess breeding ground diet of a migratory brood parasite of conservation concern
<p>Breeding ground food availability is critical to the survival and productivity of adult birds. The common cuckoo <i>Cuculus canorus</i> is a brood-parasitic Afro-Palearctic migrant bird exhibiting long-term (breeding) population declines in many European countries. Variation in population trend between regions and habitats suggests breeding ground drivers such as adult food supply. However, cuckoo diet has not been studied in detail since before the most significant population declines in Europe began in the mid-1980s. 20th century studies of cuckoo diet largely comprised field observations likely to carry bias towards larger prey taxa. Here we demonstrate the potential value of 1) using high-throughput DNA sequencing of invertebrate prey in faeces to determine cuckoo diet with minimal bias towards large prey taxa, and 2) using crowd-sourced digital photographs from across Britain to identify lepidopteran cuckoo prey taxa during recent years post-decline (2005-2016). DNA analysis found a high frequency of Lepidoptera, including moths of family Lasiocampidae, prominent within the past literature, but also grasshoppers (Orthoptera) and flies (Diptera) that may be overlooked by field observation methodologies. The range of larval lepidopteran prey identified from photographs largely agreed with those previously documented, with potential signs of reduced diversity, and identities of key adult prey taxa were supported by molecular results. Notably, many identified cuckoo prey taxa have shown severe declines due to agricultural intensification, suggesting this has driven spatial patterns of cuckoo loss. Landscape-scale, lowland rewilding interventions provide opportunities to understand the scale of reversal of previous agricultural intensification that may be necessary to restore prey populations sufficiently to permit recolonization by cuckoos.</p>
Data from: Among-individual and within-individual variation in seasonal migration covaries with subsequent reproductive success in a partially-migratory bird
<p>Within-individual and among-individual variation in expression of key environmentally-sensitive traits, and associated variation in fitness components occurring within and between years, determine the extents of phenotypic plasticity and selection and shape population responses to changing environments. Reversible seasonal migration is one key trait that directly mediates spatial escape from seasonally-deteriorating environments, causing spatio-seasonal population dynamics. Yet, within-individual and among-individual variation in seasonal migration versus year-round residence, and dynamic associations with subsequent reproductive success, have not been fully quantified. We used novel capture-mark-recapture mixture models to assign individual European shags (Phalacrocorax aristotelis) to 'resident, 'early migrant' or 'late migrant' strategies in two consecutive years, using year-round local resightings. We demonstrate substantial among-individual variation in strategy within years, and directional within-individual change between years. Further, subsequent reproductive success varied substantially among strategies, and relationships differed between years; residents and late migrants had highest success in the two years respectively, matching the years in which these strategies were most frequently expressed. These results imply that migratory strategies can experience fluctuating reproductive selection, and that flexible expression of migration can be partially aligned with reproductive outcomes. Plastic seasonal migration could then potentially contribute to adaptive population responses to currently changing forms of environmental seasonality.</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.