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10 results for “sit-and-wait”
Hunting positions in a sit-and-wait predator
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Data from: Prey speed influences the speed and structure of the raptorial strike of a ‘sit-and-wait’ predator
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Data from: Factors that can affect the spatial positioning of large and small individuals in clusters of sit-and-wait predators
<p>Shadow competition, the interception of prey by sit-and-wait predators closest to the source of prey arrival, is prevalent in clusters of sit-and-wait predators. Peripheral positions in the cluster receive more prey and should thus be more frequently occupied. Models predicting spatial positioning in groups, however, usually ignore variability among group members. Here, I used a simulation model to determine conditions under which small and large sit-and-wait predators, which differ in their attack range, should differ in their spatial positions in the cluster. Small predators occupied peripheral positions more frequently than large predators at the simulation beginning, while the opposite held true as time advanced. Due to the large and small attack range of large and small predators respectively, small predators mistakenly relocated away from peripheral positions, while large predators did not relocate fast enough from inferior central positions. Any factor that moderated the frequent relocations of small predators or had the opposite effect on large predators assisted small or large predators respectively to reach the more profitable peripheral positions. Furthermore, any factor elevating shadow competition led to longer occupation of the periphery by large predators. This model may explain why sit-and-wait predators are not homogenously distributed in space according to size.</p>
Figures 11–13 in In natura sit-and-wait behaviour and predation success of a Neotropical dance fly (Diptera: Hybotidae)
Figures 11–13. Relationships between predation success of Chvalaea yolkamini Jaume-Schinkel, Soares & Barros, 2020 and predictor variables. Each dot represents a video recording, i.e. an individual that had one successful flight or attempted multiple times before catching the prey; n = 26. 11. Significant difference in success between videos where dance flies catch large and small prey. 12. Significant higher success in videos of dance flies capturing Brachycera over Hemiptera (Aleyrodoidea) and nematocerous Diptera. 13. Positive influence of perch height (cm) in strike success. Logtransformed variables. Y-axis shows residual values from regression analyses.
Figures 5–10 in In natura sit-and-wait behaviour and predation success of a Neotropical dance fly (Diptera: Hybotidae)
Figures 5–10. Chvalaea yolkamini Jaume-Schinkel, Soares & Barros, 2020 with prey on perch. 5. Predator discarding its Cecidomyiidae prey after feeding; 6. Hemiptera; 7. Cecidomyiidae; 8. Sciaridae; 9. Drosophilidae; 10. Phoridae. (Photographs: Santiago Jaume-Schinkel).
Figures 3, 4 in In natura sit-and-wait behaviour and predation success of a Neotropical dance fly (Diptera: Hybotidae)
Figures 3, 4. Chvalaea yolkamini Jaume-Schinkel, Soares & Barros, 2020 in the sit-and-wait behaviour on perch in the Ecological Park Francisco Javier Clavijero, Xalapa, Mexico. (Photographs Santiago Jaume-Schinkel).
Figures 1, 2 in In natura sit-and-wait behaviour and predation success of a Neotropical dance fly (Diptera: Hybotidae)
Figures 1, 2. Study site, The Ecological Park Francisco Javier Clavijero: 1. Natural habitat of Chvalaea yolkamini Jaume-Schinkel, Soares & Barros, 2020, photograph by Guillermo López Escalera Argueta; 2. Park location in Xalapa, Mexico.
Data from: Factors that can affect the spatial positioning of large and small individuals in clusters of sit-and-wait predators
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A sit-and-wait predator, but not an active-pursuit predator, alters pollinator-mediated selection on floral traits
<p>Indirect species interactions are ubiquitous in nature, often outnumbering direct species interactions. Yet despite evidence that indirect interactions have strong ecological effects, relatively little is known about whether they can shape adaptive evolution by altering the strength and/or direction of natural selection. We tested whether indirect interactions affect the strength and direction of pollinator-mediated selection on floral traits of the bumble-bee pollinated wildflower Lobelia siphilitica. We estimated the indirect effects of two pollinator predators with contrasting hunting modes: dragonflies (Aeshnidae and Corduliidae) and ambush bugs (Phymata americana, Reduviidae). Because dragonflies are active pursuit predators, we hypothesized that they would strengthen pollinator-mediated selection by weakening plant-pollinator interactions (i.e. a density-mediated indirect effect). In contrast, because ambush bugs are sit-and-wait predators, we hypothesized that they would weaken or reverse the direction of pollinator-mediated selection by altering pollinator foraging behavior (i.e. a trait-mediated indirect effect). Specifically, if ambush bugs hunt from plants with traits that attract pollinators (i.e. prey), then pollinators will spend less time visiting those plants, weakening or reversing the direction of selection on attractive floral traits. We did not find evidence that high dragonfly abundance strengthened selection on floral traits via a density-mediated indirect effect: neither pollen limitation (a proxy for the strength of plant-pollinator interactions) nor directional selection on floral traits of L. siphilitica differed significantly between high- and low-dragonfly abundance treatments. In contrast, we did find evidence that ambush bug presence affected selection on floral traits via a trait-mediated indirect effect: ambush bugs hunted from L. siphilitica plants with larger daily floral displays, reversing the direction of pollinator-mediated selection on daily display size. These results suggest that indirect species interactions have the potential to shape adaptive evolution by altering natural selection.</p>
A sit-and-wait predator, but not an active-pursuit predator, alters pollinator-mediated selection on floral traits
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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.