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984 results for “migratory”
Evidence of migratory coupling between grey wolves and migratory caribou
<p>Large-scale animal migrations influence population and community dynamics along with ecosystem functioning. The migratory coupling concept posits that movement of migrant prey can lead to large-scale movements of predators. In northern ecosystems, spatial patterns and behavioral responses of grey wolf to spatio-temporal changes in its primary prey distribution, the migratory caribou, remain poorly documented. We used a long-term GPS dataset (2011–2021) of 59 wolves and 431 migratory caribou from the declining Rivière-aux-Feuilles herd (Québec, Canada) to investigate movement patterns and space use of wolves related to caribou seasonal distribution. Wolves home ranges overlapped with areas used by caribou year-round, especially in May and winter. Wolves exhibited 3 annual tactics: sedentary (17%), long-distance migration (>700 km) between wintering areas and the tundra (36%), and a medium-distance migration, stopping their northward movement near the treeline (47%). Migratory wolves started spring migration northward earlier than caribou, intercepting their prey on their way to calving grounds, but departed southward for fall migration later than caribou, tracking them on their way back to wintering areas. Wolves near or overlapping areas used by caribou exhibited lower monthly movement rates compared to wolves located further away. Overlap of home range among wolves was higher during migrations and winter but decreased in summer when wolves rear pups and caribou are dispersed on summer grounds. We provide evidence of migratory coupling between grey wolves and migratory caribou, with most wolves adjusting their space use patterns to match their primary prey distribution. Although predation pressure may affect the dynamics of declining caribou herds, the global decline of that prey may in turn impact predators on the long-term, potentially enhancing intraspecific competition for new resources. Highlighting this migratory coupling is a key step to developing appropriate conservation and management measures for both guilds in the context of large-scale migratory prey decline.</p>
Multi-colony tracking of two pelagic seabirds with contrasting flight capability illustrates how windscapes shape migratory movements at an ocean-basin scale
<p>Migration is a common trait among many animals allowing the exploitation of spatiotemporally variable resources. It often implies high energetic costs to cover large distances, for example between breeding and wintering grounds. For flying or swimming animals, the adequate use of winds and currents can help reduce the associated energetic costs. Migratory seabirds are good models because they dwell in habitats characterized by strong winds while undertaking very long migrations. We tested the hypothesis that seabirds migrate through areas with favourable winds. To that end, we used a multi-colony geolocator tracking dataset of two North Atlantic seabirds with contrasting flight capabilities, the black-legged kittiwake (<em>Rissa</em> <em>tridactyla</em>) and the Atlantic puffin (<em>Fratercula</em> <em>arctica</em>), and wind data from the ERA5 climate reanalysis model. Both species had on average positive wind support during migration. Their main migratory routes were similar and followed seasonally prevailing winds. The general migratory movement had a loop-shape at the scale of the North Atlantic, with an autumn route (southward) along the east coast of Greenland, and a spring route (northward) closer to the British Isles. While migrating, both species had higher wind support in spring than in autumn. Kittiwakes migrated farther and benefited from higher wind support than puffins on average. The variation in wind conditions encountered while migrating was linked to the geographical location of the colonies. Generally, northernmost colonies had better wind support in autumn while the southernmost colonies had a better wind support in spring, with some exceptions. Our study helps in understanding how the physical environment shapes animal migration, which is crucial to further predict how migrants will be impacted by ongoing environmental changes.</p>
Individual variation in migratory behavior in a sub-arctic partial migrant shorebird
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Age-dependent timing and routes demonstrate developmental plasticity in a long-distance migratory bird
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Predation strongly limits demography of a keystone migratory herbivore in a recovering transfrontier ecosystem
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Neuronal activation in the geomagnetic responsive region Cluster N covaries with nocturnal migratory restlessness in white-throated sparrows
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Data from: MHC class II supertypes affect survival and lifetime reproductive success in a migratory songbird
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Data from: Sedentary songbirds maintain higher prevalence of haemosporidian parasite infections than migratory conspecifics during seasonal sympatry
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Climate change and maladaptive wing shortening in a long-distance migratory bird
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Migratory bird stopover patterns linked to urbanization and social landscapes
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Data from: Nutritional imbalance suppresses migratory phenotypes of the Mongolian locust (Oedaleus asiaticus)
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Low migratory flight altitudes may explain increased collision risk for Scolopax minor (American Woodcock)
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Data from: The breeding distribution of a migratory bird fluctuates with nonbreeding season rainfall over the last century
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A global analysis of aerial displays in passerines revealed an effect of habitat, mating system and migratory traits
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Data from: Migratory monarchs that encounter resident monarchs show life-history differences and higher rates of parasite infection
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Migratory lineages rapidly evolve larger body sizes than non-migratory relatives in ray-finned fishes
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Data from: seasonal patterns and processes of migration in a long-distance migratory bird: energy or time minimization?
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Data from: Time of emergence of novel climates for North American migratory bird populations
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Climatic niche variation in genetically distinct populations throughout the annual cycle for a migratory parulid bird, <em>Cardellina pusilla</em>
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Data from: Arriving late and lean at a stopover site is selected against in a declining migratory bird population
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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.