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287 results for “Danio”
FIGURE 4 in Danio annulosus, a new species of chain Danio from the Shuvolong Falls in Bangladesh (Teleostei: Cyprinidae: Danioninae)
FIGURE 4. Type locality of Danio annulosus, at foot of Shuvolong Falls, at this time almost expired (28 November 2014).
dataset for paper entitled "Effect of Moringa Oleifera Leaf Extract On Body Length, Malondialadehyd and Interleukin-6 Levels in Zebrafish Larvae (Danio Rerio) Induced Stunting Model with Rotenone"
<p>The dataset consist of:</p> <p>1. Appendices of tools and material used for laboratory research</p> <p>2. Certificate of ethical test </p> <p>3. Data of moringa oleifera controls</p> <p>4. Data of zebrafish growth </p>
Data from: Population genomics of wild and laboratory zebrafish (Danio rerio)
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Data from: Cost of transport is a repeatable trait but is not determined by mitochondrial efficiency in zebrafish (Danio rerio)
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Data from: Ultraviolet B radiation alters movement and thermal selection of zebrafish (Danio rerio)
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Data from: Density and group size influence shoal cohesion, but not coordination in zebrafish (Danio rerio)
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The effects of exploratory behavior on physical activity in a common animal model of human disease, zebrafish (Danio rerio)
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Data for Rates of warming impact oxidative stress in zebrafish (Danio rerio)
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Data from: Thyroid hormone receptor beta mutations alter photoreceptor development and function in Danio rerio (zebrafish)
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Diet and temperature modify the relationship between energy use and ATP production to influence behaviour in zebrafish (Danio rerio)
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Data from: The effects of lateral line ablation and regeneration in schooling giant danios
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Data for: Social rank and not physiological capacity determines competitive success in zebrafish (Danio rerio)
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Data from: Glutathione S-transferase protein expression in different life stages of zebrafish (Danio rerio)
Zebrafish is a widely used animal model in biomedical sciences and toxicology. Although evidence for the presence of phase I and phase II xenobiotic defense mechanisms in zebrafish exists on the transcriptional and enzyme activity level, little is known about the protein expression of xenobiotic metabolizing enzymes. Given the important role of glutathione S-transferases (GSTs) in phase II biotransformation, we analyzed cytosolic GST proteins in zebrafish early life stages and different organs of adult male and female fish, using a targeted proteomics approach. The established Multiple Reaction Monitoring-based assays enable the measurement of the relative abundance of specific GST isoenzymes and GST classes in zebrafish through a combination of proteotypic peptides and peptides shared within the same class. GSTs of the classes alpha, mu, pi and rho are expressed in zebrafish embryo as early as 4 hours post fertilization (hpf). The majority of GST enzymes are present at 72 hpf followed by a continuous increase in expression thereafter. In adult zebrafish, GST expression is organ dependent, with most of the GST classes showing the highest expression in the liver. The expression of a wide range of cytosolic GST isoenzymes and classes in zebrafish early life stages and adulthood supports the use of zebrafish as a model organism in chemical-related investigations.
Data from: Hypoxia-inducible factor-1 mediates adaptive developmental plasticity of hypoxia tolerance in zebrafish, Danio rerio
In recent years, natural and anthropogenic factors have increased aquatic hypoxia the world over. In most organisms, the cellular response to hypoxia is mediated by the master regulator hypoxia-inducible factor-1 (HIF-1). HIF-1 also plays a critical role in the normal development of the cardiovascular system of vertebrates. We tested the hypothesis that hypoxia exposures which resulted in HIF-1 induction during embryogenesis would be associated with enhanced hypoxia tolerance in subsequent developmental stages. We exposed zebrafish (Danio rerio) embryos to just 4 h of severe hypoxia or total anoxia at 18, 24 and 36 h post-fertilization (hpf). Of these, exposure to hypoxia at 24 and 36 hpf as well as anoxia at 36 hpf activated the HIF-1 cellular pathway. Zebrafish embryos that acutely upregulated the HIF-1 pathway had an increased hypoxia tolerance as larvae. The critical window for hypoxia sensitivity and HIF-1 signalling was 24 hpf. Adult male fish had a lower critical oxygen tension (Pcrit) compared with females. Early induction of HIF-1 correlated directly with an increased proportion of males in the population. We conclude that mounting a HIF-1 response during embryogenesis is associated with long-term impacts on the phenotype of later stages which could influence both individual hypoxia tolerance and population dynamics.
Data from: Feeding in murky waters: acclimatization and landmarks improve foraging efficiency of zebrafish (Danio rerio) in turbid waters
Fish inhabiting human-dominated ecosystems are prone to altered sensory environments in which they must live and function. Increased turbidity is one such change that they must deal with. We tested whether an increase in water turbidity and presence of visual landmarks (coloured stones) affect the foraging efficiency of wild zebrafish. We also tested the influence of extended exposure to differing turbidity levels on the subsequent foraging efficiency of acclimatized individuals. Feeding latency (time taken to find food) increased significantly with increase in turbidity levels from a minimum of 4 s to ca. 300 s. However, extended exposure of fish to varying levels of turbidity decreased feeding latencies in acclimatized conditions, indicating that acclimatization to the immediate visual environment plays an important role in determining foraging success. Most significantly, we found that feeding latencies in turbid conditions decreased significantly if visual landmarks were present. This demonstrates that zebrafish utilize visual landmark cues to navigate to foraging sites when visibility is impaired. This study has important implications on the role of behavioural plasticity and spatial learning in animals that allow them to cope with altered sensory environments such as episodes of enhanced turbidity that could be natural or anthropogenic.
Data from: Mate competition and evolutionary outcomes in genetically modified Zebrafish (Danio rerio)
Demonstrating relationships between sexual selection mechanisms and trait evolution is central to testing evolutionary theory. Using zebrafish, we found that wild-type males possessed a significant advantage in mate competition over transgenic RFP Glofish™ males. In mating trials, wild-type males were aggressively superior to transgenic males in male-male chases and male-female chases; as a result, wild-type males sired 2.5x as many young as did transgenic males. In contrast, an earlier study demonstrated that female zebrafish preferred transgenic males as mates when mate competition was excluded experimentally. We tested the evolutionary consequence of this conflict between sexual selection mechanisms in a long-term study. The predicted loss of the transgenic phenotype was confirmed. More than 18,500 adults collected from 18 populations across 15 generations revealed that the frequency of the transgenic phenotype declined rapidly and was eliminated entirely in all but one population. Fitness component data for both sexes indicated that only male mating success differed between wild-type and transgenic individuals. Our predictive demographic model based on fitness components closely matched the rate of transgenic phenotype loss observed in the long-term study, thereby supporting its utility for studies assessing evolutionary outcomes of escaped or released genetically modified animals.
FIGURE 4. Danio feegradei. Holotype, ZSI F. 12477 in Description of Danio absconditus, new species, and redescription of Danio feegradei (Teleostei: Cyprinidae), from the Rakhine Yoma hotspot in south-western Myanmar
FIGURE 4. Danio feegradei. Holotype, ZSI F. 12477/1, 37.2 mm SL. Myanmar, Rakhine state, Thandwe.
FIGURE 1. Danio feegradei. BMNH 2011.3.24.7–28, 50.2 in Description of Danio absconditus, new species, and redescription of Danio feegradei (Teleostei: Cyprinidae), from the Rakhine Yoma hotspot in south-western Myanmar
FIGURE 1. Danio feegradei. BMNH 2011.3.24.7–28, 50.2 mm SL. Myanmar, Rakhine State, Daung Chaung.
FIGURE 3 in Description of Danio absconditus, new species, and redescription of Danio feegradei (Teleostei: Cyprinidae), from the Rakhine Yoma hotspot in south-western Myanmar
FIGURE 3. Danio feegradei. Adult female in live coloration. Aquarium specimen, not preserved.
FIGURE 2 in Description of Danio absconditus, new species, and redescription of Danio feegradei (Teleostei: Cyprinidae), from the Rakhine Yoma hotspot in south-western Myanmar
FIGURE 2. Danio feegradei. Adult male in live coloration. Aquarium specimen, not preserved.
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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.