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349 results for “Viability”
Viability of Natural Populations of Hypancistrus zebra (Silu-riformes, Loricariidae), Xingu, Brazil
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Favoring recruitment as a conservation strategy to improve the resilience of long-lived reptile populations: insights from a population viability analysis
<p>In long-lived species, although adult survival typically has the highest elasticity, temporal variations in less canalized demographic parameters are the main drivers of population dynamics. Targeting recruitment rates may thus be the most effective strategy to manage these species. We analyzed 1136 capture–recapture histories collected over 9 years in an isolated population of the critically endangered Lesser Antillean iguana, using a robust-design Pradel model to estimate adult survival and recruitment rates. From an adult population size estimated at 928 in 2013, we found a yearly decline of 4% over the 8-year period. As expected under the canalization hypothesis for a long-lived species, adult survival was high and constant, with little possibility for improvement, whereas the recruitment rate varied over time and likely drove the observed population decline. We then used a prospective perturbation analysis to explore whether managing the species' immature cohorts would at least slow the population decline. The prospective perturbation analysis suggested that a significant and sustained conservation effort would be needed to achieve a recruitment rate high enough to slow the population decline. We posit that the high recruitment rate achieved in 2014 – likely due to the maintenance in 2012 of the main nesting sites used by this population – would be sufficient to slow this population's decline if it was sustained each year. Based on the results of diverse pilot studies we conducted, we identified the most likely threats targeting the eggs and immature cohorts, stressing the need to improve reproductive success and survival of immature iguanas. The threats we identified are also involved in the decline of several reptile species, and species from other taxa such as ground-nesting birds. These findings on a little-studied taxon provide further evidence that focusing on the immature life stages of long-lived species can be key to their conservation.</p>
Pathogenic LRRK2 causes age-dependent and region-specific deficits in ciliation, innervation and viability of cholinergic neurons_1
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MariaPaniw/meerkats: meerkat_population_viability
<p>Code and data to replicate analyses in Paniw et al. 2019 Science 363: 631-635.</p>
Dataset for Machine Learning-Based Prediction and Optimization of As-Extruded Viability in Extrusion-Based 3D Bioprinting
<p>The dataset supports the findings presented in the paper "Machine learning-based prediction and optimization framework for as-extruded cell viability in extrusion-based 3D bioprinting."</p> <ul> <li>Sodium alginate viscosity data: "alg_i1g_viscosity_data.zip"</li> <li>Cross Power Law parameter fitting results: "alg_i1g_viscosity_fittings.zip"</li> <li>Rheological stability measurement: "alg_i1g_contact_angle_data.zip"</li> <li>OpenFOAM simulation results: "alg_i1g_simulation_data.zip"</li> <li>Post-extrusion cell viability results: "cell_viability_data.zip"</li> </ul> <p><strong>Keywords:</strong> 3D bioprinting; cell viability; shear stress; numerical analysis; machine learning; alginate<br><br></p> <p><strong>Code availability statement</strong><br>The scripts used for data analysis, machine learning models, and numerical simulations in this study are available on GitHub at: <a href="https://github.com/KORINZ/in-silico-bioink-viability-prediction">https://github.com/KORINZ/in-silico-bioink-viability-prediction</a></p>
Molecular assays to detect the presence and viability of Phytophthora ramorum and Grosmannia clavigera
<p>Protocols for the RNA and DNA extractions, cDNA synthesis and qPCR and RT-qPCR for detecting and assessing viability of the Phytophthora ramorum and Grosmannia clavigera tree pathogens.</p>
Data from: Viability selection by invertebrate predators in the polyphenic scavenger fly Sepsis thoracica
Predation is a major factor influencing the fitness and life history of animals. Two key traits affecting prey survival are body size and coloration. Sepsis thoracica males display a sigmoid relationship between these two traits, defining a size threshold above which investment in melanin drastically drops, producing small melanic (black) or large amber morphs. In trying to understand the evolution of this rare dimorphism, we performed laboratory predation experiments to estimate the intensity of adult viability selection exerted by various arthropod predators (bugs, flies, spiders) on male body size and coloration. Selection was performed against two different backgrounds mimicking the natural habitat (dung and grass) in which the camouflage and/or warning effect of the morphs should vary. Body size was mainly under positive selection (larger survived better), which overpowered selection on coloration and varied somewhat among predator species but not backgrounds. No disruptive selection was found, nor did selection change the sigmoid relationship between the two traits. We conclude that, for this fly, predator evasion and escaping skills determined by body size are more effective against invertebrate predators than its conspicuousness determined by coloration, contrasting what has been found for vertebrate predators, where prey coloration is important and negative selection on size dominates. Because arthropod predators have strong effects on insect populations, the positive directional selection imposed by invertebrate predators is likely an important force driving the evolution of body size in S. thoracica and insects in general.
Data from: Using a full annual cycle model to evaluate long-term population viability of the conservation-reliant Kirtland's warbler after successful recovery
Long-term management planning for conservation-reliant migratory songbirds is particularly challenging because habitat quality in different stages and geographic locations of the annual cycle can have direct and carry-over effects that influence the population dynamics. The Neotropical migratory songbird Kirtland's warbler Setophaga kirtlandii (Baird 1852) is listed as endangered under the U.S. Endangered Species Act and Near Threatened under the IUCN Red List. This conservation-reliant species is being considered for U.S. federal delisting because the species has surpassed the designated 1000 breeding pairs recovery threshold since 2001. To help inform the delisting decision and long-term management efforts, we developed a population simulation model for the Kirtland's warbler that incorporated both breeding and wintering grounds habitat dynamics, and projected population viability based on current environmental conditions and potential future management scenarios. Future management scenarios included the continuation of current management conditions, reduced productivity and carrying capacity due to the changes in habitat suitability from the creation of experimental jack pine Pinus banksiana (Lamb.) plantations, and reduced productivity from alteration of the brown-headed cowbird Molothrus ater (Boddaert 1783) removal programme. Linking wintering grounds precipitation to productivity improved the accuracy of the model for replicating past observed population dynamics. Our future simulations indicate that the Kirtland's warbler population is stable under two potential future management scenarios: (i) continuation of current management practices and (ii) spatially restricting cowbird removal to the core breeding area, assuming that cowbirds reduce productivity in the remaining patches by ≤41%. The additional future management scenarios we assessed resulted in population declines. Synthesis and applications. Our study indicates that the Kirtland's warbler population is stable under current management conditions and that the jack pine plantation and cowbird removal programmes continue to be necessary for the long-term persistence of the species. This study represents one of the first attempts to incorporate full annual cycle dynamics into a population viability analysis for a migratory bird, and our results indicate that incorporating wintering grounds dynamics improved the model performance.
Dataset of research about Potential of Purwoceng Extract (Pimpinella pruatjan Molkenb.) as Anti-Nicotine Therapy against Viability, Spermatozoa Membrane Integrity, and Organogenesis
<p>The dataset included:</p> <p>1. Ethical test certificate</p> <p>2. Description of ethical clearance</p> <p>3. List of figures of tools and goods used for this study</p> <p>4. Result of active ingredient purwoceng test certificates</p> <p>5. Results of Observation of Viability and Integrity of Spermatozoa Membranes appendices</p>
Developing and Study of on-line Biotoxicity Sensing and Control Unit for Wastewater Treatment, based on a Cell Viability Monitoring Assay
<p>The quality of industrial, municipal or hospital waters varies greatly throughout the days and seasons. Because usually one of the first steps of water treatment plants (WWTPs) is biological treatment (after mechanical cleaning) it is vital that this step operates at full capacity. However, toxic compounds such as antibiotics, which are in use for human consumption or animal agriculture can greatly disrupt this stage of cleaning due to their antibiological nature of operation.</p> <p>Technion has developed a system in which toxicity to bacteria is measured on-line. It is based on following spectral changes in a dye, which is reduced as part of bacterial metabolism, which depends on the level of toxicity. The measured toxicity values are fed to a PID controller, which controls the operation of an AOP reactor.</p> <p>This system was developed as part of "Project O", a H2020 program of the European Commission.</p>
Adherence, Viability, Clinical Evolution and Therapeutic Efficacy in Patients Undergoing Bone Marrow Transplantation
ClinicalTrials.gov study NCT06134297. IPD Sharing: NO. Countries: 1. Publications: 42.
The Viability Control of Human Endothelial Cells Before Keratoplasty (V-CHECK) Study
ClinicalTrials.gov study NCT05847387. IPD Sharing: YES. Countries: 6. Publications: 1.
Viability Testing and Transplantation of Marginal Livers
ClinicalTrials.gov study NCT02740608. IPD Sharing: NO. Countries: 1. Publications: 7.
Viability of Pulsioflex Monitoring in ICU
ClinicalTrials.gov study NCT04911985. IPD Sharing: NO. Countries: 1. Publications: 5.
Coronary Flow and Myocardial Viability: the FloVITA Study
ClinicalTrials.gov study NCT04818918. IPD Sharing: Not stated. Countries: 1. Publications: 1.
The Use of Indocyanine Green Angiography to Predict Expanded Flap Viability
ClinicalTrials.gov study NCT04097665. IPD Sharing: UNDECIDED. Countries: 1. Publications: 14.
Day 3 Embryo Cryopreservation: Metabolic and Viability Analysis
ClinicalTrials.gov study NCT00608010. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Percutaneous Revascularization in Infarction With Late Presentation and Absence of Viability: Effects on Left Ventricular Remodeling and Contractility
ClinicalTrials.gov study NCT05160311. IPD Sharing: NO. Countries: 1. Publications: 23.
Combination of Olmesartan Effect on Myocardial Viability of Patients With Dilated Cardiomyopathy
ClinicalTrials.gov study NCT04174456. IPD Sharing: NO. Countries: 1. Publications: 2.
The Viability-Guided Angioplasty After Acute Myocardial Infarction-Trial (The VIAMI-Trial)
ClinicalTrials.gov study NCT00149591. IPD Sharing: Not stated. Countries: 1. Publications: 48.
ScienceDex guides
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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.