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37 results for “flagellate”
Figure 2 in Two freshwater flagellates from the Mahananda Wildlife Sanctuary, West Bengal
Figure 2. Photomicrographs of Entosiphon sulcatum from live (A-C) and silver stained preparations (D-F). A-C. Slightly pressed specimen due to cover slip pressure, showing the body shape, cytoplasmic crystals, lipid droplets, granules on the surface, food vacuoles and vacuole. Arrows point to the flagella. Note the protruding feeding organelles D-F. Specimens showing the body size variation, differences in the flagella length, and nucleus position. The irregular nucleolus and base of the flagellum is visible in the stained preparations. C, crystals; F1,2, flagellum 1, 2; FB, flagella base; FO, feeding organelle; FV, food vacuoles; G, granules; L, lipid droplet; N, nucleus; Nu, nucleolus; V, vacuole. Scale bars, 10 μm.
McMurdo Dry Valleys Microzooplankton : Flagellate Grazing in Lakes Hoare and Fryxell
In conjunction with the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, lakes were monitored for microzooplankton by a team based out of the University of Nottingham (led by Johanna Laybourn-Parry). This dataset shows grazing rates of heterotrophic and mixotrophic flagellates found in Lakes Hoare and Fryxell at various depths and dates.
Fig. 1 in Free-living Heterotrophic Flagellates Lakes in Turkey (Protista) from Two Hypersaline
Fig. 1. Map of study sites.
Glissandra oviformis n. sp.: A novel predatory flagellate illuminates the character evolution within the eukaryotic clade CRuMs
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Data from: Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate
Environmental stochasticity is important in explaining the persistence and establishment of invasive species, but the simultaneous effects of environmental and demographic factors are difficult to separate. Understanding how demography and environmental factors affect invasive species abundance over large temporal and spatial scales is essential to anticipate populations at risk of becoming established and setting appropriate management measures. Using a hierarchical mixed modeling approach we analyzed the spatial and interannual dynamics of the invasive raphidophyte Gonyostomum semen, a noxious flagellate which is spreading in northern Europe, in response to demographic and environmental variation. We used data from 76 lakes distributed across two biogeographical regions in Sweden (Central Plains in the south and Fennoscandian region in the north) and sampled during 14 years. We found a strong asynchrony in the density dynamics of G. semen populations between the two regions. G. semen showed positive trends (i.e. increasing frequency of high density peaks) in most southern lakes, forming established populations with recurrent blooms in successive years in some of them. In contrast, G. semen populations were smaller and more stochastic in the north. G. semen previous year's abundance, a proxy for cyst production and recruitment, had a strong control on the dynamics, likely contributing to the stability of high density populations in southern lakes. Conversely, the effects of climate and habitat were weaker and their influence varied across regions. Temperature was the limiting factor in the north whereas local habitat was more important in the south. Synthesis: A full understanding of the mechanisms driving abundance changes across large scales can only be gained if endogenous and environmental factors are analyzed together. For phytoplankton species, and specially, noxious microalgae, this implies that proxies for cyst production and recruitment, which are the inoculum for next year population, should be included in e.g. distribution, bloom formation and climate models, as these may modify establishment and population response to environmental variation. Asynchronous changes in abundance across regions also indicate that management plans should be developed for small regions, as inference at a large scale may obscure the mechanisms driving local population changes.
Original dataset of 10 heterophic flagellates taxa in Antarctic
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Data from: Asynchronous changes in abundance over large scales are explained by demographic variation rather than environmental stochasticity in an invasive flagellate
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A target enrichment probe set for resolving the flagellate land plant tree of life
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Figure 1 in Two freshwater flagellates from the Mahananda Wildlife Sanctuary, West Bengal
Figure 1. Photomicrographs of Rhabdomonas costata from live (A-D) and silver stained preparations (E). A-D. Specimens showing the body shape, paramylon bodies (B), nucleus position (D) and ejectosomes (C, D), Arrows point to the flagellum. E. Four specimens showing the body size variation, flagella length, and nucleus position. The nucleolus is visible in the stained preparations. E, ejectosomes; F1,2, flagellum 1, 2; N, nucleus; Nu, nucleolus; PG, paramylon bodies. Scale bars, 10 μm.
Flagellate grazing morphometrics, particle tracking, prey-handling behavior, clearance rates and forces
<p>Heterotrophic nanoflagellates are the main consumers of bacteria and picophytoplankton in the ocean. In their micro-scale world, viscosity impedes predator-prey contact, and the mechanisms that allow flagellates to daily clear a volume of water for prey corresponding to 10<sup>6</sup> times their own volume is unclear. It is also unclear what limits the observed maximum ingestion rates of about 10<sup>4</sup> bacterial prey per day. We used high-speed video-microscopy to describe feeding flows, flagellum kinematics, and prey searching, capture, and handling in four species with different foraging strategies. In three species, prey-handling times limit ingestion rates and account well for their reported maximum values. Similarly, observed feeding flows match reported clearance rates. Simple point-force models allowed us to estimate the forces required to generate the feeding flows, between 4-13 pN, and consistent with the force produced by the hairy (hispid) flagellum, as estimated using resistive force theory. Hispid flagella can produce a force that is much higher than the force produced by a naked flagellum with similar kinematics, and the hairy flagellum is therefore key to foraging in most nanoflagellates. Our findings provide a mechanistic underpinning of observed functional responses of prey ingestion rates in nanoflagellates.</p>
Flagellate grazing morphometrics, particle tracking, prey-handling behavior, clearance rates and forces
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Role of the major determinant of polar flagellation FlhG in the endoflagella-containing spirochete Leptospira
GEO Series GSE171376. Leptospira biflexa. 8 samples. Type: Expression profiling by high throughput sequencing.
Dusona_flagellator_plate
<p><strong>Figure 35</strong><strong>.</strong> <em>D. flagellator </em>(Fabricius, 1793). ♀ Switzerland. <strong>a.</strong> habitus. <strong>b.</strong> antennal carina. <strong>c.</strong> junction of genal and hypostomal carina. <strong>d.</strong> mesopleuron. <strong>e.</strong> propodeum. <strong>f.</strong> first gastral tergite. <strong>g.</strong> 2<sup>nd</sup> and 3<sup>rd</sup> gastral tergites. Scale bars indicate 3 mm (a), 0.5 mm (b – g).</p> <p>Publication: Open Access in a taxonomic sense: a morphological and molecular guide to Western Palearctic <em>Dusona </em>(Hymenoptera, Ichneumonidae)</p>
Fig. 5 in Heterotrophic Flagellates from Freshwater and Soil Habitats in Subtropical China (Wuhan Area, Hubei Province)
Fig. 5. Species accumulation curve. Whiskers – standard deviation.
Expression analysis of Naegleria gruberi (strain NEG) during differentiation from the amoeba to the flagellate form
GEO Series GSE21527. Naegleria gruberi. 15 samples. Type: Expression profiling by array.
An organelle-tethering mechanism couples flagellation to cell division in bacteria
GEO Series GSE153968. Caulobacter vibrioides. 6 samples. Type: Expression profiling by high throughput sequencing.
Imprinting of the neonatal gut epithelium by flagellated commensal bacteria
GEO Series GSE264411. Mus musculus. 3 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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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.