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49 results for “prey abundance”
Few species, higher abundance or many species and lower abundance of birds of prey: effects of land use changes at different spatial scales
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Interference competition between wolves and coyotes during variable prey abundance
<ul> <li> <a name="_Hlk57016985"> Interference competition occurs when two species have similar resource requirements and one species is dominant and can suppress or exclude the subordinate species. </a>Wolves (<i>Canis lupus</i>) and coyotes (<i>C. latrans</i>) are sympatric across much of their range in North America where white-tailed deer (<i>Odocoileus virginianus</i>) can be an important prey species. We assessed the extent of niche overlap between wolves and coyotes using activity, diet, and space use as evidence for interference competition during 3 periods related to the availability of white-tailed deer fawns in the Upper Great Lakes region of the USA.</li> <li>We assessed activity overlap (Δ) with data from accelerometers onboard global positioning system (GPS) collars worn by wolves (<i>n</i> = 11) and coyotes (<i>n</i> = 13). We analyzed wolf and coyote scat to estimate dietary breadth (<i>B</i>) and food niche overlap (α). We used resource utilization functions (RUFs) with canid GPS location data, white-tailed deer RUFs, ruffed grouse (<i>Bonasa umbellus</i>) and snowshoe hare (<i>Lepus americanus</i>) densities, and landscape covariates to compare population-level space use.</li> <li>Wolves and coyotes exhibited considerable overlap in activity (Δ = 0.86–0.92), diet (<i>B</i> = 3.1–4.9; α = 0.76–1.0), and space use of active and inactive RUFs across time periods. Coyotes relied less on deer as prey compared to wolves and consumed greater amounts of smaller prey items. Coyotes exhibited greater population-level variation in space use compared to wolves. <a name="_Hlk57643527">Additionally, while active and inactive, coyotes exhibited greater selection of some land covers as compared to wolves.</a> </li> <li>Our findings lend support for interference competition between wolves and coyotes with significant overlap across resource attributes examined. The mechanisms through which wolves and coyotes coexist appear driven largely by how coyotes, a generalist species, exploit narrow differences in resource availability and display greater population-level plasticity in resource use.</li> </ul>
Fig. 3 in Alterations on piscivorous diet following change in abundance of prey after impoundment in a Neotropical river
Fig. 3. Dominance curve of prey items in the diet of Acestrorhynchus pantaneiro, based on Index of Relative Importance (IRI) in each sampling period at Manso Reservoir, Mato Grosso State, Brazil (n = 314; 187-period I and 127- period II). B = trophic niche breadth.
Temporal changes in predator density are linked to shifts in prey behavior, mortality, and abundance in the field
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Interference competition between wolves and coyotes during variable prey abundance
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Data from: Resource availability and sexual size dimorphism: differential effects of prey abundance on the growth rates of tropical snakes
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Predation risk in relation to brain size in alternative prey of pygmy owls varies depending on the abundance of main prey
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Data from: Spatiotemporal heterogeneity in prey abundance and vulnerability shapes the foraging tactics of an omnivore
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Fig. 1 in Alterations on piscivorous diet following change in abundance of prey after impoundment in a Neotropical river
Fig. 1. Study area and location of sampling sites.
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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.