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113 results for “danger”
Supplementary material 1 from: Crookes S, Heer T, Castañeda RA, Mandrak NE, Heath DD, Weyl OLF, MacIsaac HJ, Foxcroft LC (2020) Monitoring the silver carp invasion in Africa: a case study using environmental DNA (eDNA) in dangerous watersheds. NeoBiota 56: 31-47. https://doi.org/10.3897/neobiota.56.47475
Table 1
Calling in the face of danger: do nestling Red-winged Blackbirds (Agelaius phoeniceus) suppress begging in response to predator playbacks?
<p>Nest predation is the most frequent cause of nest failure in birds such as the Red-winged Blackbird (<i>Agelaius phoeniceus</i>) that nest on or near the substrate. Nestlings should therefore exhibit adaptations to reduce the risk of nest predation. We tested the nestling antipredator hypothesis by examining the begging responses of Red-winged Blackbird nestlings to vocalizations of: (1) an important nest predator (American Crow, <i>Corvus brachyrhynchos</i>)<i>,</i> (2) a<i> </i>predator that rarely preys on nestlings (Cooper's Hawk, <i>Accipiter cooperii</i>), and (3) a nonpredator (Northern Flicker, <i>Colaptes auratus</i>). We performed playbacks with: (1) both parents present at the nest, (2) male at the nest, and (3) neither parent present. Following playback, we measured duration of nestling begging after the parent departed (begging persistence), bouts of otherwise normal begging when no parent was present (parent-absent begging), and calling without postural components of begging (nonpostural begging). When the male or both parents were present during playback, adults responded with alarm calls and nestlings significantly reduced parent-absent begging following American Crow and Cooper's Hawk playbacks. Nonpostural begging was significantly reduced following Cooper's Hawk playback, but there were no significant differences in the other begging variables. When neither parent was present, we found no significant differences in nonpostural begging in response to the three playback types, but parent-absent begging was significantly reduced following American Crow and Cooper's Hawk playbacks when compared to Northern Flicker playbacks. These results show that nestlings suppress their vocal begging in response to calls of predators including Cooper's Hawks even though they are not common nest predators.</p>
Data from: On dangerous ground: the evolution of body armour in cordyline lizards
Animal body armour is often considered an adaptation that protects prey against predatory attacks, yet comparative studies that link the diversification of these allegedly protective coverings to differential predation risk or pressure are scarce. Here, we examine the evolution of body armour, including spines and osteoderms, in Cordylinae, a radiation of southern African lizards. Using phylogenetic comparative methods, we attempt to identify the ecological and environmental correlates of body armour that may hint at the selective pressures responsible for defensive trait diversification. Our results show that species inhabiting arid environments are more likely to possess elaborated body armour, specifically osteoderms. We did not find any effect of estimated predation pressure or risk on the degree of body armour. These findings suggest that body armour might not necessarily evolve in response to direct interactions with predators, but rather as a result of increased habitat-mediated predation risk. Furthermore, we discuss the possibility that osteoderms might have been shaped by factors unrelated to predation.
Data from: Personal information about danger trumps social information from avian alarm calls
Information about predators can mean the difference between life and death, but prey face the challenge of integrating personal information about predators with social information from the alarm calls of others. This challenge might even affect the structure of interspecific information networks: species vary in response to alarm calls, potentially because different foraging ecologies constrain the acquisition of personal information. However, the hypothesis that constrained personal information explains a greater response to alarm calls has not been experimentally tested. We used a within-species test to compare the antipredator responses of New Holland honeyeaters, Phylidonyris novaehollandiae, during contrasting foraging behaviour. Compared to perched birds, which hawk for insects and have a broad view, those foraging on flowers were slower to spot gliding model predators, showing that foraging behaviour can affect predator detection. Furthermore, nectar-foraging birds were more likely to flee to alarm call playbacks. Birds also assessed social information relevance: more distant calls, and those from another species, prompted fewer flights and slower reaction times. Overall, birds made flexible decisions about danger by integrating personal and social information, while weighing information relevance. These findings support the idea that a strategic balance of personal and social information could affect community function.
Supporting data for: The danger zone: the joint trap of incomplete lineage sorting and long-branch attraction in resolving the Gondwanan origin of Rafflesiaceae and Apodanthaceae
<p>This is supporting sequence data for the paper: The danger zone: the joint trap of incomplete lineage sorting and long-branch attraction in resolving the Gondwanan origin of Rafflesiaceae and Apodanthaceae. It contains DNA and protein sequences as well as gene trees for 2135 loci for the investigation of the phylogenetic placement of the parasitic Rafflesiaceae and Apodannthaceae.</p>
Data from: Safety cues can give prey more valuable information than danger cues
The ability of prey to assess predation risk is fundamental to their success. It is routinely assumed predator cues do not vary in reliability across levels of predation risk. We propose that cues can differ in how precisely they indicate different levels of predation risk. What we call danger cues precisely indicate high risk levels, while safety cues precisely indicate low risk levels. Using optimality modeling, we find that prey fitness is increased when prey pay more attention to safety cues than danger cues. This fitness advantage is greatest when prey need to protect assets, predators are more dangerous, and predation risk increases at an accelerating rate with prey foraging efforts. Each of these conditions lead to prey foraging less when estimated predation risk is higher. Danger cues have less value than safety cues because they give precise information about risk when it is high, but prey behavior varies little when risk is high. Safety cues give precise information about levels of risk where prey behavior varies. These results highlight how our fascination with predators may have biased the way we study predator-prey interactions and focused too exclusively on cues that clearly indicate the presence of predator rather than cues that clearly indicate their absence.
Figure 2 in Feeding close to fishing lights may be dangerous for the larvae of the smallest freshwater fish of Europe
Figure 2. – Ivlev's electivity values estimated for Eudiaptomus drieschi, Diaphanosoma orghidani, the larvae of the mollusk Dreissena blanci, and Daphnia cucullata found in stomach contents of Economidichthys trichonis larvae caught in light traps with white, red, yellow, blue, and green LSTs in each sampling month in Lake Trichonis.
Figure 1 in Feeding close to fishing lights may be dangerous for the larvae of the smallest freshwater fish of Europe
Figure 1. – Frequency of occurrence (F%) of the five most important prey taxa in stomach contents of Economidichthys trichonis larvae caught in light traps with white, red, yellow, blue, and green LSTs in each sampling month in Lake Trichonis.
Figure 1 in A little learning is a dangerous thing - on the usefulness of barcode data for genus-level taxonomy
Figure 1. Summary of the problems affecting molecular taxonomy at different levels of resolution. At the genus level, barcode-based phylogenetic inferences are least likely to be affected by problems that are seriously limiting work at the lower and higher levels of resolution.
Figure 2 in A little learning is a dangerous thing - on the usefulness of barcode data for genus-level taxonomy
Figure 2. Comparison of various phylogenetic proposals for the Savignia group. (A) Subdivisions according to Millidge (1977). (B) Extract of the strict consensus tree in Frick et al. (2010:fig. 5). (C) Preferred barcode-based tree using the data in Breitling (2019a; majority-rule consensus of trees inferred by neighbour-joining, maximum parsimony, maximum likelihood and Bayesian methods).
Fig 2 in Is repeated cypermethrin fumigation dangerous for the mitochondrial DNA in dry insect samples?
Fig 2. Habitus of organisms used in this study. Left – Oxythyrea funesta (Poda von Neuhaus, 1761), right – Supella longipalpa (Fabricius, 1798). Scale bar = 5 mm.
Supplementary material 4 from: Petrosyan V, Osipov F, Feniova I, Dergunova N, Warshavsky A, Khlyap L, Dzialowski A (2023) The TOP-100 most dangerous invasive alien species in Northern Eurasia: invasion trends and species distribution modelling. NeoBiota 82: 23-56. https://doi.org/10.3897/neobiota.82.96282
Geographic partitioning of the SOR
Supplementary material 1 from: Petrosyan V, Osipov F, Feniova I, Dergunova N, Warshavsky A, Khlyap L, Dzialowski A (2023) The TOP-100 most dangerous invasive alien species in Northern Eurasia: invasion trends and species distribution modelling. NeoBiota 82: 23-56. https://doi.org/10.3897/neobiota.82.96282
Criterion selection of the TOP-100 IAS
Supplementary material 7 from: Petrosyan V, Osipov F, Feniova I, Dergunova N, Warshavsky A, Khlyap L, Dzialowski A (2023) The TOP-100 most dangerous invasive alien species in Northern Eurasia: invasion trends and species distribution modelling. NeoBiota 82: 23-56. https://doi.org/10.3897/neobiota.82.96282
The short description of invasive range of IAS in Russia
Supplementary material 3 from: Petrosyan V, Osipov F, Feniova I, Dergunova N, Warshavsky A, Khlyap L, Dzialowski A (2023) The TOP-100 most dangerous invasive alien species in Northern Eurasia: invasion trends and species distribution modelling. NeoBiota 82: 23-56. https://doi.org/10.3897/neobiota.82.96282
Species native range, introduction year, occurrence records
Supplementary material 2 from: Petrosyan V, Osipov F, Feniova I, Dergunova N, Warshavsky A, Khlyap L, Dzialowski A (2023) The TOP-100 most dangerous invasive alien species in Northern Eurasia: invasion trends and species distribution modelling. NeoBiota 82: 23-56. https://doi.org/10.3897/neobiota.82.96282
General description and conceptual structure of the database (FDB)
Supplementary material 8 from: Petrosyan V, Osipov F, Feniova I, Dergunova N, Warshavsky A, Khlyap L, Dzialowski A (2023) The TOP-100 most dangerous invasive alien species in Northern Eurasia: invasion trends and species distribution modelling. NeoBiota 82: 23-56. https://doi.org/10.3897/neobiota.82.96282
Species richness of IAS in Northern Eurasia
Supplementary material 5 from: Petrosyan V, Osipov F, Feniova I, Dergunova N, Warshavsky A, Khlyap L, Dzialowski A (2023) The TOP-100 most dangerous invasive alien species in Northern Eurasia: invasion trends and species distribution modelling. NeoBiota 82: 23-56. https://doi.org/10.3897/neobiota.82.96282
Moran's I indexes of residual spatial autocorrelation for MaxEnt models
Supplementary material 6 from: Petrosyan V, Osipov F, Feniova I, Dergunova N, Warshavsky A, Khlyap L, Dzialowski A (2023) The TOP-100 most dangerous invasive alien species in Northern Eurasia: invasion trends and species distribution modelling. NeoBiota 82: 23-56. https://doi.org/10.3897/neobiota.82.96282
Moran's I correlograms of residual spatial autocorrelation for MaxEnt models
Danger Signs in Heart Failure- Effects of Video Education
ClinicalTrials.gov study NCT03657459. IPD Sharing: NO. Countries: 1. Publications: 0.
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Allen Brain Atlas
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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.