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12 results for “trans-oceanic”
Figure 1 in The first substantiated case of trans-oceanic tortoise dispersal
Figure 1. The Aldabra tortoise at Kimbiji, shortly after its discovery in December 2004. Photograph: C. Muir.
Figure 2 in The first substantiated case of trans-oceanic tortoise dispersal
Figure 2. Map showing probable dispersal route.
Figure 3 in The first substantiated case of trans-oceanic tortoise dispersal
Figure 3. Aldabra tortoise at sea off Alphonse in December 2005. Photograph: J. Gerlach.
Data from: Habitat preference modulates trans-oceanic dispersal in a terrestrial vertebrate
The importance of long-distance dispersal in shaping geographic distributions has been debated since the 19th century. In terrestrial vertebrates, long-distance dispersal events across large water bodies are considered highly improbable, but organismal traits affecting dispersal capacity are generally not taken into account. Here, we focus on a recent lizard radiation and combine a summary-coalescent species tree based on 1225 exons with a probabilistic model that links dispersal capacity to an evolving trait, to investigate whether ecological specialization has influenced the probability of trans-oceanic dispersal. Cryptoblepharus species that occur in coastal habitats have on average dispersed 13 to 14 times more frequently than non-coastal species and coastal specialization has therefore led to an extraordinarily widespread distribution that includes multiple continents and distant island archipelagoes. Furthermore, their presence across the Pacific substantially predates the age of human colonization and we can therefore explicitly reject the possibility that these patterns are solely shaped by human mediated dispersal. Overall, by combining new analytical methods with a comprehensive phylogenomic dataset, we use a quantitative framework to show how coastal specialization can influence dispersal capacity and eventually shape geographic distributions at a macroevolutionary scale.
Data from: The first record of a trans-oceanic sister-group relationship between obligate vertebrate troglobites
We show using the most complete phylogeny of one of the most species-rich orders of vertebrates (Gobiiformes), and calibrations from the rich fossil record of teleost fishes, that the genus Typhleotris, endemic to subterranean karst habitats in southwestern Madagascar, is the sister group to Milyeringa, endemic to similar subterranean systems in northwestern Australia. Both groups are eyeless, and our phylogenetic and biogeographic results show that these obligate cave fishes now found on opposite ends of the Indian Ocean (separated by nearly 7,000 km) are each others closest relatives and owe their origins to the break up of the southern supercontinent, Gondwana, at the end of the Cretaceous period. Trans-oceanic sister-group relationships are otherwise unknown between blind, cave-adapted vertebrates and our results provide an extraordinary case of Gondwanan vicariance.
Rapid recovery by fat- and muscle-depleted Blackpoll Warblers following trans-oceanic migration is driven by time-minimization
<p>Non-stop endurance flights are a defining characteristic of many long-distance migratory birds but subsequent recovery phases are not typically distinguished from fueling phases (collectively 'stopovers'), despite endurance flights inducing marked physiological changes including flight muscle atrophy and gastrointestinal tract reductions. Here, we hypothesize that recovery requires unique behavioral adaptations, leading to departures from the predictions of optimal migration theory for time-minimizing migrants. We predict that recovering birds will 1) select (moist) food-rich habitats on arrival; 2) have slow initial fueling rates due to decreased gastrointestinal capacity; 3) show a negative correlation between stopover duration and arrival condition instead of a negative correlation with fuel deposition rate (FDR); 4) stopover longer than required to store energy reserves for subsequent flights; and 5) show evidence of rebuilding flight muscles. To test these predictions, we studied Blackpoll Warblers <em>Setophaga striata</em> in northern Colombia following trans-oceanic flights >2250 km. Birds selected dry seasonal habitats, despite proximity of moist forests, and among 1227 captured individuals, 14-21% were emaciated and 88% had atrophied flight muscles. We recaptured 74 individuals, revealing net positive mass gains and, contrary to Prediction 2, no evidence for slow initial recovery rates. Contrary to Prediction 3, stopover duration was only weakly correlated with arrival condition and birds with high FDR (4.9% LBM/day) had shorter durations (3 days) relative to birds with slower rates (7 days) - both groups accumulated sufficient fuel to reach non-breeding (over-wintering) grounds 500-1000 km away. Mass increases were largely attributable to fat deposition but some birds improved flight muscle condition (31.9%), consistent with Prediction 5. Together these results reveal a strong selection for time-minimization in the decisions made by Blackpoll Warblers following trans-oceanic flights, likely mediated through advantages to early arrival on non-breeding grounds, contrary to our hypothesis of recovery imposing unique selection pressures.</p>
Data from: Climate impacts on trans-ocean dispersal and habitat in gray whales from the Pleistocene to 2100
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Data from: The first record of a trans-oceanic sister-group relationship between obligate vertebrate troglobites
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Data from: Across the Indian Ocean: a remarkable example of trans-oceanic dispersal in an austral mygalomorph spider
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Data from: Trans-oceanic genomic divergence of Atlantic cod ecotypes is associated with large inversions
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Data from: Habitat preference modulates trans-oceanic dispersal in a terrestrial vertebrate
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Rapid recovery by fat- and muscle-depleted Blackpoll Warblers following trans-oceanic migration is driven by time-minimization
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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.