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113 results for “sublethal”
Sublethal effects of Voliam Flexi on Spodoptera frugiperda (Lepidoptera: Noctuidae): Insights from Life Table Theory
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Bioaccumulation of the pesticide Imidacloprid in stream organisms and sublethal effects in salamanders in West Virginia
<p>Dataset for the article "Bioaccumulation of the Pesticide Imidacloprid in Stream Organisms and Sublethal Effects on Salamanders." Contains imidacloprid and metabolite concentrations for Desmognathus spp., benthic macroinvertebrates, and stream water. Also contains corticosterone concentration data for Desmognathus spp. and body condition indices for 5 species of stream salamander in relation to water imidacloprid concentrations.Dataset for the article "Bioaccumulation of the Pesticide Imidacloprid in Stream Organisms and Sublethal Effects on Salamanders." Contains imidacloprid and metabolite concentrations for Desmognathus spp., benthic macroinvertebrates, and stream water. Also contains corticosterone concentration data for Desmognathus spp. and body condition indices for 5 species of stream salamander in relation to water imidacloprid concentrations.</p>
Data from: Regime shifts shorten food chains for mesopredators with potential sublethal effects
1. Predator populations are in decline globally. Exploitation, as well as habitat degradation and associated changes in prey availability are key drivers of this process of trophic downgrading. In the short term, longevity and dietary adaptability of large-bodied consumers can mask potential sub-lethal effects of a changing prey base, producing a delayed effect that may be difficult to detect. 2. In coral reef ecosystems, regime shifts from coral- to algae-dominated states caused by coral bleaching significantly alter the assemblage of small-bodied reef fish associated with a reef. The effects of this changing prey community on reef-associated mesopredators remains poorly understood. 3. This study found that the total diversity, abundance and biomass of piscivorous mesopredators was lower on regime-shifted reefs than recovering reefs, 16 years after the 1998 mass coral bleaching event. 4. We used stable isotope analyses to test for habitat-driven changes in the trophic niche occupied by a key piscivorous fishery target species on reefs that had regime-shifted or recovered following climatic disturbance. Using morphometric indices, histology, and lipid analyses, we also investigated whether there were sub-lethal costs for fish on regime-shifted reefs. 5. Stable isotopes demonstrated that fish from regime-shifted reefs fed further down the food chain, compared to recovering reefs. Lower densities of hepatocyte vacuoles in fish from regime-shifted reefs, and reduced lipid concentrations in spawning females from these reefs, indicated a reduction in energy stores, constituting a sub-lethal and potential delayed effect on populations. 6. Reduced energy reserves in mesopredators could lead to energy allocation trade-offs, and decreased growth rates, fecundity, and survivorship, resulting in potential population declines in the longer term.
Data from: Lethal and sublethal synergistic effects of a new systemic pesticide, flupyradifurone (Sivanto®) on honey bees
The honey bee (Apis mellifera L.) is an important pollinator and a model for pesticide effects on insect pollinators. The effects of agricultural pesticides on honey bee health have therefore raised concern. Bees can be exposed to multiple pesticides that may interact synergistically, amplifying their side-effects. Attention has focused on neonicotinoid pesticides, but flupyradifurone (FPF) is a novel butenolide insecticide that is also systemic and a nicotinic acetylcholine receptor (nAChR) agonist. We therefore tested the lethal and sublethal toxic effects of FPF over different seasons and worker types, and the interaction of FPF with a common SBI fungicide, propiconazole. We provide the first demonstration of adverse synergistic effects on bee survival and behaviour (poor coordination, hyperactivity, apathy) at field-realistic doses. Pesticide effects were significantly influenced by worker type and season. Foragers were consistently more susceptible to these pesticides (4-fold greater effect) than in-hive bees, and both worker types were more strongly affected by FPF in summer as compared to spring. Because risk assessment requires relatively limited tests that only marginally address bee behaviour and do not consider the influence of bee age and season, our results raise concerns about the safety of approved pesticides, including FPF. We suggest that pesticide risk assessment also test for common chemical mixture synergies on behaviour and survival.
Sublethal effects of a rapidly spreading native alga on a key herbivore
<p>1. Multiple anthropogenic stressors are causing a global decline of foundation species including macrophytes often resulting in the expansion of functionally different more stressor-tolerant macrophytes. Previously subdominant species may experience further positive demographic feedbacks if they are exposed to weaker plant herbivore interactions, possibly via decreased palatability or being structurally different from the species they are replacing. However, the consequences of the spread of opportunistic macrophytes for the local distribution and life-history of herbivores is unknown.</p> <p>2. The green alga, Caulerpa filiformis, previously a subdominant macrophyte on low tidal-shallow subtidal rock shores is becoming locally more abundant and has spread into warmer waters across the coast of New South Wales, Australia. </p> <p>3. In this study, we measured 1) the distribution and abundance of a key consumer, the sea urchin Heliocidaris erythrogramma, across a seascape at sites where C. filiformis has become dominant, 2) performed behavioral field experiments to test the role of habitat selection in determining the local distribution of H. erythrogramma and 3) consumer experiments to test differential palatability between previously dominant higher quality species like Ecklonia radiata and Sargassum sp and C. filiformis and the physiological consequences of consuming it. </p> <p>4. At all sites, urchin densities were positively correlated with distance away from C. filiformis beds, and they actively moved away from beds. Feeding experiments showed that, whilst urchins consumed C. filiformis, sometimes in equal amounts to higher quality algae, there were strong sublethal consequences associated with C. filiformis consumption, mainly on reproductive potential (gonad size). Specifically, the gonad size of urchins that fed on C. filiformis was equivalent to that in starved urchins. There was also a tendency for urchin mortality to be greater when fed C. filiformis.</p> <p>5. Overall, strong negative effects on herbivore life-history traits and potentially their survivorship may establish further positive-feedbacks on C. filiformis abundance that contribute to its spread and may mediate shifts from top-down to bottom-up control at locations where C. filiformis has become dominant.</p>
Data for manuscript:"Chronic exposure to sublethal levels of pesticides has significant effects on fitness and morphology in the ant, Cardiocondyla obscurior"
<p>All data used in analysis for manuscript "<strong>Chronic exposure to sublethal levels of pesticides has significant effects on fitness and morphology in the ant, <em>Cardiocondyla obscurior"</em></strong></p> <p> </p> <p> </p>
Supplementary data for "The fitness of beta-lactamase mutants depends nonlinearly on resistance level at sublethal antibiotic concentrations."
<p>Supplementary data files and scripts, notes and figures accompanying the manuscript with working title "The fitness of beta-lactamase mutants depends nonlinearly on resistance level at sublethal antibiotic concentrations". The figures and tables this dataset underpins is indicated in the name of each file of the dataset, or in the section "Code and data accessibility" of the manuscript.</p>
Bioaccumulation of the pesticide Imidacloprid in stream organisms and sublethal effects in salamanders in West Virginia
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Sublethal effects of photoactive engineered nanomaterials on filamentous bacteriophage infection and <em>E. coli</em> gene expression in freshwater
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Data from: Under the influence: sublethal exposure to an insecticide affects personality expression in a jumping spider
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Data from: Lethal and sublethal synergistic effects of a new systemic pesticide, flupyradifurone (Sivanto®) on honey bees
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Data from: Frequent and seasonally variable sublethal anthrax infections are accompanied by short-lived immunity in an endemic system
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Data from: Detailed monitoring of a small but recovering population reveals sublethal effects of disease and unexpected interactions with supplemental feeding
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Data from: Plastic hatching timing by red-eyed treefrog embryos interacts with larval predator identity and sublethal predation to affect prey morphology but not performance
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Data from: The evolutionary fate of heterogeneous gene duplications: a precarious overdominant equilibrium between environment, sublethality and complementation.
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Data from: Regime shifts shorten food chains for mesopredators with potential sublethal effects
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Sublethal effects of a rapidly spreading native alga on a key herbivore
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DATA SET - Sublethal exposure to deltamethrin impairs maternal egg care in the European earwig Forficula auricularia
<p>Data set of the manuscript entitled "Sublethal exposure to deltamethrin impairs maternal egg care in the European earwig Forficula auricularia" and published in the journal Chemosphere.</p>
Data from: Chronic impairment of bumblebee natural foraging behaviour induced by sublethal pesticide exposure
1. Insect pollination is a vital ecosystem service that maintains biodiversity and sustains agricultural crop yields. Social bees are essential insect pollinators so it is concerning that their populations are in global decline. 2. Although pesticide exposure has been implicated as a possible cause for bee declines, we currently have a limited understanding of the risk these chemicals pose. Whilst environmental exposure to pesticides typically has non-lethal effects on individual bees, recent reports suggest that sublethal exposure can affect important behavioural traits such as foraging. However, at present we know comparatively little about how natural foraging behaviour is impaired and the relative impacts of acute and chronic effects. 3. Using Radio Frequency Identification (RFID) tagging technology we examined how the day-to-day foraging patterns of bumblebees (Bombus terrestris) were affected when exposed to either a neonicotinoid (imidacloprid) and/or a pyrethroid (λ-cyhalothrin) independently and in combination over a four week period. This is the first study to provide data on the impacts of combined and individual pesticide exposure on the temporal dynamics of foraging behaviour in the field over a prolonged period of time. 4. Our results show that neonicotinoid exposure has both acute and chronic effects on overall foraging activity. While foragers from control colonies improved their pollen foraging performance as they gained experience, the performance of bees exposed to imidacloprid became worse: chronic behavioural impairment. We also found evidence suggesting that pesticide exposure can change forager preferences for the flower types from which they collect pollen. 5. Our findings highlight the importance of considering prolonged exposure (which happens in the field) when assessing the risk that pesticides pose to bees. The effects of chronic pesticide exposure could have serious detrimental consequences for both colony survival and also the pollination services provided by these essential insect pollinators.
Data from: The SOS response increases bacterial fitness, but not evolvability, under a sublethal dose of antibiotic
Exposure to antibiotics induces the expression of mutagenic bacterial stress–response pathways, but the evolutionary benefits of these responses remain unclear. One possibility is that stress–response pathways provide a short-term advantage by protecting bacteria against the toxic effects of antibiotics. Second, it is possible that stress-induced mutagenesis provides a long-term advantage by accelerating the evolution of resistance. Here, we directly measure the contribution of the Pseudomonas aeruginosa SOS pathway to bacterial fitness and evolvability in the presence of sublethal doses of ciprofloxacin. Using short-term competition experiments, we demonstrate that the SOS pathway increases competitive fitness in the presence of ciprofloxacin. Continued exposure to ciprofloxacin results in the rapid evolution of increased fitness and antibiotic resistance, but we find no evidence that SOS-induced mutagenesis accelerates the rate of adaptation to ciprofloxacin during a 200 generation selection experiment. Intriguingly, we find that the expression of the SOS pathway decreases during adaptation to ciprofloxacin, and this helps to explain why this pathway does not increase long-term evolvability. Furthermore, we argue that the SOS pathway fails to accelerate adaptation to ciprofloxacin because the modest increase in the mutation rate associated with SOS mutagenesis is offset by a decrease in the effective strength of selection for increased resistance at a population level. Our findings suggest that the primary evolutionary benefit of the SOS response is to increase bacterial competitive ability, and that stress-induced mutagenesis is an unwanted side effect, and not a selected attribute, of this pathway.
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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.