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28 results for “migratory pattern”
Data for: "Continental-scale patterns in diel flight timing of high-altitude migratory insects"
<p>This dataset contains the proportional migratory insect intensity and traffic data used in Haest <em>et al.</em> (2024) to quantify patterns in diel flight periodicity of migratory insects between 50-500m above ground level during March-October 2021 using a network of seventeen vertical-looking radars across Europe. Please see the Materials and Methods section in Haest <em>et al.</em> (2024) for more details on the dataset. </p>
Fig. 6 in Plasticity in the shape and growth pattern of asteriscus otolith of black prochilodus Prochilodus nigricans (Teleostei: Characiformes: Prochilodontidae) freshwater Neotropical migratory fish
Fig. 6. Regressions between radius of each increments and increments growth estimated in Prochilodus nigricans from Solimões (red), Japurá (blue) and Negro (black) Amazon Basin, Brazil.
Fig. 5 in Plasticity in the shape and growth pattern of asteriscus otolith of black prochilodus Prochilodus nigricans (Teleostei: Characiformes: Prochilodontidae) freshwater Neotropical migratory fish
Fig. 5. Canonical variate analysis of the organized data of the analysis cluster. Representation the four different morphotypes of asteriscus otoliths of Prochilodus nigricans. (red cross) Morphotype 3; (blue square) Morphotype 2; (purple asterisk) Morphotype 4; (green ex) Morphotype 1.
Fig. 4 in Plasticity in the shape and growth pattern of asteriscus otolith of black prochilodus Prochilodus nigricans (Teleostei: Characiformes: Prochilodontidae) freshwater Neotropical migratory fish
Fig. 4. Four morphotype asteriscus otolith Prochilodus nigricans established by cluster analysis from the amplitudes of wavelets. a. morphotype 1; b. morphotype 2; c. morphotype 3 and d. morphotype 4 respectively, sampled of rivers Solimões, Japurá and Negro. Scale bars: 1 mm.
Fig. 1 in Plasticity in the shape and growth pattern of asteriscus otolith of black prochilodus Prochilodus nigricans (Teleostei: Characiformes: Prochilodontidae) freshwater Neotropical migratory fish
Fig. 1. Partial map of the Amazon basin showing the study area where Prochilodus nigricans were collected. Rivers: Solimões, Japurá and Negro, Brazil.
Logger data for article "Effects of blood parasite infections on spatiotemporal migration patterns and activity budgets in a long-distance migratory passerine"
<p>The supplement loggerDATA.zip is a ZIP Archive (to be unzipped e.g. with <a href="https://www.izarc.org/downloads">https://www.izarc.org/downloads</a>) containing 40 folders and one .txt file. In the readME.txt file one can find a detailed description of the folder content and the data specifications of the files used for the analyses in the article "Effects of blood parasite infections on spatiotemporal migration patterns and activity budgets in a long-distance migratory passerine".</p> <p>For more information of how the data can be analysed and visualised please see: <a href="https://kiranlda.github.io/PAMLrManual/">https://kiranlda.github.io/PAMLrManual/</a>.</p>
Migration variables and infection data for article "Effects of blood parasite infections on spatiotemporal migration patterns and activity budgets in a long-distance migratory passerine"
<p>Data related to the article "Effects of blood parasite infections on spatiotemporal migration patterns and activity budgets in a long-distance migratory passerine" in the format .csv. The 1st file (SupplTab_EcoEvo_data.csv) contains all variables used for the analyses and the 2nd file (SupplTab_EcoEvo_glossary.csv) contains explanations about the variables in the 1st file.</p>
Data from: seasonal patterns and processes of migration in a long-distance migratory bird: energy or time minimization?
<p>Optimal migration theory prescribes adaptive strategies of energy, time or mortality minimization. To test alternative hypotheses of energy and time minimization migration we used multisensory data loggers recording time-resolved flight activity and light for positioning by geolocation in a long-distance migratory shorebird, little ringed plover Charadrius dubius. We could reject the hypothesis of energy minimization based on a relationship between stopover duration and subsequent flight time as predicted for a time minimizer. We found seasonally diverging slopes between stopover and flight durations in relation to the progress (time) of migration, which follows for a time minimizing policy if resource gradients increase and decrease, respectively. Total flight duration did not differ significantly between autumn and spring migration, although spring migration was 6% shorter. Overall duration of autumn migration was longer than that in spring, mainly due to a mid-migration stop in most birds, when they likely initiated moult. Overall migration speed was not significantly different between autumn and spring. Migratory flights often occurred as runs of 2-7 nocturnal flights on adjacent days, which may be countering a time minimization strategy. Other factors may influence a preference for nocturnal migration, such as avoiding flight in turbulent conditions, heat stress, and diurnal predators.</p>
Data from: Habitat security pattern of migratory birds in Dalian (transit station)
<p>Dalian is an important "transit station" for migratory birds in the East Asian-Australasian flyway,located at the throat of the habitat of migratory birds in the Yellow (Bohai) Sea, and is an important stop,foraging and breeding place for migratory birds in the long-distance migration process.Based on the idea of Land-sea integration, this study aims to promote the improvement of the ecological environment of migratory bird habitats, enhance species diversity, and strengthen population exchange, identify the habitat security pattern in the "transit station" area, and put forward restoration suggestions. By selecting important habitat patches from the MSPA model, landscape connectivity analysis, and important bird habitats in Dalian, the random movement of birds was simulated through circuit theory, and the ecological corridors and important corridor nodes of migratory birds were identified to construct a habitat security pattern. The results of the study identified the ecological reserves, key areas, and areas to be restored in the study area. Among them, the areas to be restored are graded according to the importance of ecological security, and targeted restoration strategies are proposed. The habitat security pattern of migratory birds constructed in this paper can provide a scientific basis for the protection of migratory bird habitats.</p>
Migratory bird stopover patterns linked to urbanization and social landscapes
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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: Spatiotemporal patterns in profiles of amino acids indicates they are unlikely singular olfactory cues underlying natal homing in migratory fishes
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Data from: Contrasting patterns of land use by resident and migratory bird assemblages in a tropical working landscape
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Data from: Ecological security patterns of migratory bird habitat from the perspective of circuit theory: A case study of Dalian
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Data from: Climate change could disrupt migratory patterns for an Arctic seabird population
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Data from: Can patterns of habitat use by western Nearctic-Neotropical migratory landbirds in winter inform conservation priorities?
<p>ABSTRACT—I use point-count survey data collected from 171 locations across 11 vegetation conditions in western Mexico to illustrate common patterns of winter habitat use by 97 Nearctic-Neotropical migratory landbird species. A number of bird species are relatively restricted in their habitat use, with some [e.g., Northern Waterthrush (<i>Parkesia noveboracensis</i>), American Redstart (<i>Setophaga ruticilla</i>)] occurring only in relatively undisturbed habitats, and others [e.g., Say's Phoebe (<i>Sayornis saya</i>), Horned Lark (<i>Eremophila alpestris</i>)] occurring only in relatively disturbed lands associated with agriculture. A large number of bird species [e.g., Cassin's Vireo (<i>Vireo cassinii</i>), MacGillivray's Warbler (<i>Geothlypis tolmiei</i>)] use every one of the vegetation types considered, from low-elevation tropical deciduous forests to high-elevation conifer forests. Bird species showing patterns of restricted habitat use deserve conservation attention, but so might more broadly distributed species that become significantly less abundant in human-altered habitats. Identifying the latter will require the inclusion of a wider spectrum of altered vegetation types/conditions than what I included here, or than what is typically considered in wildlife-habitat relationship programs.</p>
Data from: Overwintering strategies of migratory birds: a novel approach for estimating seasonal movement patterns of residents and transients
1. Our understanding of movement patterns in wildlife populations has played an important role in current ecological knowledge, and can inform landscape conservation decisions. Direct measures of movement can be obtained using marked individuals, but this requires tracking individuals across a landscape or multiple sites. 2. We demonstrate how movements can be estimated indirectly using single-site, capture–mark–recapture (CMR) data with a multistate open robust design with state uncertainty model (MSORD-SU). We treat residence and transience as two phenotypic states of overwintering migrants, and use time- and state-dependent probabilities of site entry and persistence as indirect measures of movement. We applied the MSORD-SU to data on eight species of overwintering Neotropical birds collected in 14 countries between 2002 and 2011. In addition to entry and persistence probabilities, we estimated proportions of residents at a study site, and mean residence times. 3. We identified overwintering movement patterns and residence times that contrasted with prior categorizations of territoriality. Most species showed evidence of residents entering sites at multiple time intervals, with transients tending to enter between peak resident movement times. Persistence and the proportion of residents varied by latitude, but were not always positively correlated for a given species. 4. Synthesis and applications: Our results suggest that migratory songbirds commonly move among habitats during the overwintering period. Substantial proportions of populations appear to be comprised of transient individuals, and residents tend to persist at specific sites for relatively short periods of time. This information on persistence and movement patterns should be explored for specific habitats to guide landscape management on the wintering grounds, such as determining which habitats are conserved or restored as part of certification programs of tropical agroforestry crops. We suggest that research and conservation efforts on Neotropical migrant songbirds focus on identifying landscape configurations and regional habitat networks that support these diverse overwintering strategies to secure full life cycle conservation.
Data from: Host-adapted aphid populations differ in their migratory patterns and capacity to colonize crops
Although phytophagous insects can vary genetically in host use and exhibit long-range movements, the combined implications of these phenomena for pest management have received limited attention. To address this, we surveyed the genetic diversity of pea aphid Acyrthosiphon pisum using twelve microsatellite loci and assessed host association patterns and annual movement from a putative source region (Columbia River Basin) to the Palouse region of northern Idaho and western Washington, where the aphid is a pest of pea Pisum sativum. A total of 320 identified unique genotypes clustered into four genetic groups, with two host plant associations: alfalfa Medicago sativa (three genetic groups), and pea Pisum sativum and vetch Vicia villosa (one genetic group). All four genetic groups occurred in the Columbia River Basin and in migrant aphids collected in pan traps during spring colonization in the Palouse during 2 years of this study. Patterns of group arrival on the Palouse were spatially structured early in the season, consistent with differing migration patterns. Despite genetic diversity of migrants, a single genetic group became predominant in pea crops each year. Clonal laboratory colonies of pea aphids established from field-collected specimens and representing two predominant genetic groups exhibited reciprocal performance trade-offs, with alfalfa being a poor host for a pea-associated aphid genotype and vice versa. Synthesis and applications. Annual spring migrants of pea aphids in the pea production region of the Palouse are genetically diverse, with different host plant affinities consistent with origination from source populations in the Columbia River Basin. As the season progresses, a single genetic group adapted to pea becomes predominant in the crop. Management of pea aphid in the Palouse will be improved by monitoring the temporal and spatial variation of specific genetic groups of the aphid arriving as immigrants during each crop season, providing this information to producers and adjusting estimates of risk of crop damage accordingly. The principle could apply to other pest species with host-adapted populations that colonize crops on an annual basis.
Data from: Demographic and spatiotemporal patterns of avian influenza infection at the continental scale, and in relation to annual life cycle of a migratory host
Since the spread of highly pathogenic avian influenza (HPAI) H5N1 in the eastern hemisphere, numerous surveillance programs and studies have been undertaken to detect the occurrence, distribution, or spread of avian influenza viruses (AIV) in wild bird populations worldwide. To identify demographic determinants and spatiotemporal patterns of AIV infection in long distance migratory waterfowl in North America, we fitted generalized linear models with binominal distribution to analyze results from 13,574 blue-winged teal (Anas discors, BWTE) sampled in 2007 to 2010 year round during AIV surveillance programs in Canada and the United States. Our analyses revealed that during late summer staging (July-August) and fall migration (September-October), hatch year (HY) birds were more likely to be infected than after hatch year (AHY) birds, however there was no difference between age categories for the remainder of the year (winter, spring migration, and breeding period), likely due to maturing immune systems and newly acquired immunity of HY birds. Probability of infection increased non-linearly with latitude, and was highest in late summer prior to fall migration when densities of birds and the proportion of susceptible HY birds in the population are highest. Birds in the Central and Mississippi flyways were more likely to be infected compared to those in the Atlantic flyway. Seasonal cycles and spatial variation of AIV infection were largely driven by the dynamics of AIV infection in HY birds, which had more prominent cycles and spatial variation in infection compared to AHY birds. Our results demonstrate demographic as well as seasonal, latitudinal and flyway trends across Canada and the US, while illustrating the importance of migratory host life cycle and age in driving cyclical patterns of prevalence.
Data from: Satellite tracking reveals novel migratory patterns and the importance of seamounts for endangered South Pacific humpback whales
The humpback whale population of New Caledonia appears to display a novel migratory pattern characterized by multiple directions, long migratory paths and frequent pauses over seamounts and other shallow geographical features. Using satellite-monitored radio tags, we tracked 34 whales for between 5 and 110 days, travelling between 270 and 8540 km on their southward migration from a breeding ground in southern New Caledonia. Mean migration speed was 3.53±2.22 km h−1, while movements within the breeding ground averaged 2.01±1.63 km h−1. The tag data demonstrate that seamounts play an important role as offshore habitats for this species. Whales displayed an intensive use of oceanic seamounts both in the breeding season and on migration. Seamounts probably serve multiple and important roles as breeding locations, resting areas, navigational landmarks or even supplemental feeding grounds for this species, which can be viewed as a transient component of the seamount communities. Satellite telemetry suggests that seamounts represent an overlooked cryptic habitat for the species. The frequent use by humpback whales of such remote locations has important implications for conservation and management.
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.