Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
569
datasets available to search
ShareScore release 0.9.0
Dataset results
569 results for “Gymnotiform”
Fig. 4 in Kidney anatomy, histology and histometric traits associated to renosomatic index in Gymnotus inaequilabiatus (Gymnotiformes: Gymnotidae)
Fig. 4. Histological cross-sections of the head and exocrine kidney demonstrating different granulomatous structures in Gymnotus inaequilabiatus. a. severe aggregation of MMCs outer to granuloma in the exocrine kidney; PAS, bar scale = 20 µm. b. a clump of melanogenic macrophages (dark pigmented cells) adjacent to granuloma in the head kidney. The hematopoietic tissue is edematous and atypical. Some rodlet cells (black arrow) are observed. Granuloma presents a compact and thick layer of collagen with internal necrotic content surrounded by epithelioid cells (white arrows); H&E, bar scale = 10 µm. c. two well-defined granulomas with substantial internal necrotic content involved by fibrous tissue. A slight layer of MMCs aggregates close to the external wall of granuloma. TM, bar scale = 10 µm. d. MMCs aggregates both internally and externally to granuloma in the exocrine kidney. HE, bar scale = 10 µm.
Fig. 2 in Kidney anatomy, histology and histometric traits associated to renosomatic index in Gymnotus inaequilabiatus (Gymnotiformes: Gymnotidae)
Fig. 2. Cross-section of the head and exocrine kidney in Gymnotus inaequilabiatus. a. a transitional area between head (HE) and exocrine kidney (EX) drained by postcardinal vein (PCV). Lymphohematopoietic tissue is abundant in the head portion. MMCs are diffusely distributed in both portions. A thick fibrous capsule covers the organ (white arrow); HE, bar scale = 500 µm. b. the general aspect of the head kidney. Vascular sinusoids (white arrows) surrounding the lymphohematopoietic tissue enclosing the MMCs (black arrow); HE, bar scale = 200 µm. c. interstitial lymphohematopoietic tissue with MMCs deposits characterizes the exocrine kidney, in addition, the contoured tubules; renal corpuscle (white arrow); HE, bar scale = 200 µm. d. the exocrine kidney with a proximal convoluted tubule showing hyaline degeneration of the tubular epithelium often found in this species; HE, bar scale = 100 µm. e. exocrine kidney showing the corpuscle of Stannius (*). This structure is not lobulated, and is delimited by a fibrous capsule, and situated at the junction between head and exocrine portions; HE, bar scale = 500 µm. f. detail of junction between lymphohematopoietic tissue and corpuscle of Stannius in the head kidney. Fiber bundles subdivide both structures. Rodlet cells (white arrow), macrophages (M) and eosinophilic granulocytic cells (black arrow); granulocytic (G) and secretory cells (SC) internally fill the corpuscle; HE, bar scale = 50 µm.
Fig. 3 in First chromosomal analysis of Gymnorhamphichthys britskii: the remarkable lowest diploid value within the family Rhamphichthyidae (Gymnotiformes)
Fig. 3. Karyotypes of Gymnorhamphichthys britskii arranged a. from Giemsa stained; b. C-banded; and c. after double- FISH with 18S rDNA (red) and 5S rDNA (green) probes.. The NOR-bearing chromosomes (pair 9) are in the box. Note the size heteromorphism involving the NORs detected by the Ag- NOR and 18S rDNA-FISH techniques. Scales bar = 10 µm.
Fig. 3 in Molecular assessment of Gymnotus spp. (Gymnotiformes: Gymnotidae) fishing used as live baitfish in the Tietê River, Brazil
Fig. 3. Agarose gel electrophoresis (3.0%) of NlaIII restriction fragments obtained from COI partial PCR amplification. Gymnotus cf. sylvius (1T13, 1T24, 1T20, 1T36, 2T29) and G. cf. cuia (2T13, 2T32 and 2T24). M- 100 bp molecular weight marker (Sinapse Inc). Numbers at fragments indicate estimated molecular weight.
Fig. 2 in Molecular assessment of Gymnotus spp. (Gymnotiformes: Gymnotidae) fishing used as live baitfish in the Tietê River, Brazil
Fig. 2. Neighbor-joining dendrogram of the COI partial sequences of Gymnotus spp. (1T13, 2T29, 1T14, 1T36, 2T26, 2T13, 2T32 and 2T24) collected in the Jacaré-Guaçu River, State of São Paulo, and obtained from GenBank, constructed from the distances of Kimura (K2P). The bootstrap values are indicated on the branches
FIGURE 10 in Three new species of the Eigenmannia trilineata species group (Gymnotiformes: Sternopygidae) from northwestern South America
FIGURE 10 | Morphology of myorhabdoi and pseudotympanum of Eigenmannia camposi (A.,C.; IAvH-P-7023) and Sternopygus aequilabiatus (B.,D.; MPUJ-9518) from the middle Magdalena basin (Honda-Tolima). A. E. camposi epipleural myorhabdoi bones. B. S. aequilabiatus epipleural myorhabdoi bones. C. Detail of the obliquus inferioris muscle limiting the posteroventral margin of muscular hiatus in E. camposi. D. Detail of the obliquus inferioris muscle limiting the posteroventral margin of muscular hiatus in S. aequilabiatus. Scale bar 1 cm.
FIGURE 4 in Three new species of the Eigenmannia trilineata species group (Gymnotiformes: Sternopygidae) from northwestern South America
FIGURE 4 | MANOVA/CVA scatter plot. Red: Atrato; Fuchsia: Caribe-Guajira; Aqua: Catatumbo-Maracaibo; Yellow: cis-Andean; Green: Lower Magdalena; Gray: Middle Magdalena; Black: Upper Magdalena.
FIGURE 3 in Three new species of the Eigenmannia trilineata species group (Gymnotiformes: Sternopygidae) from northwestern South America
FIGURE 3 | BG-PCA scatter plot for Eigenmannia. Red: Atrato; Fuchsia: Caribe-Guajira; Aqua: Catatumbo-Maracaibo; Yellow: cis-Andean; Green: Lower Magdalena; Gray: Middle Magdalena; Black: Upper Magdalena.
FIGURE 7 in Three new species of the Eigenmannia trilineata species group (Gymnotiformes: Sternopygidae) from northwestern South America
FIGURE 7 | Map illustrating the known geographic distribution of Eigenmannia camposi (circles), E. zenuensis (squares), and E. magoi (triangles). Red symbols indicate type localities.
FIGURE 5 in Three new species of the Eigenmannia trilineata species group (Gymnotiformes: Sternopygidae) from northwestern South America
FIGURE 5 | Bayesian phylogenetic tree of trans-Andean Eigenmannia obtained with COI data showing colored bars for GMYC (pink), ABGD (green), Genetic Distances (yellow), and numbers over final OTUs (blue). Cis-Andean Eigenmannia sp. specimens belong to Amazon and Orinoco basins.
FIGURE 1 in Three new species of the Eigenmannia trilineata species group (Gymnotiformes: Sternopygidae) from northwestern South America
FIGURE 1 | Landmarks (red dots) and Semi-landmarks (points equally spaced over imaginary white lines).
Fig. 3. A in Sperm ultrastructure in three different families of weakly electric fishes (Teleostei: Gymnotiformes)
Fig. 3. A: Spermatozoon of Eigenmannia trilineata (SEM), h = sperm head, arrow = flagellum, double arrow = midpiece, m = mitochondrion; B, E: Spermatozoa of E. trilineata in longitudinal section (TEM) showing ovoid nucleus (n) with flocculent chromatin, centriolar arrangement (dc= distal centriole, pc= proximal centriole), and elongate mitochondria (m), v = vesicles; C: Flagella of spermatozoa of E. trilineata in cross sections (TEM) showing axonemal or flagellar fins (af); D: Midpiece of spermatozoa of E. trilineata in cross section (TEM) showing presence of vesicles (v) and mitochondria (m), and flagellar axoneme (a) with electron-lucent tubules of each peripheral doublet. Scale bars = 1µm.
Fig. 2. A in Sperm ultrastructure in three different families of weakly electric fishes (Teleostei: Gymnotiformes)
Fig. 2. A: Spermatozoon of Gymnotus aff. carapo (SEM), h = sperm head, arrow = flagellum, double arrow = midpiece; B-C: Spermatozoa of G.aff. carapo in longitudinal section (TEM) showing spherical nucleus (n), centriolar complex and flagellum (f) lateral to the nucleus (n), double nuclear fossa (double arrow), centriolar arrangement (dc= distal centriole, pc= proximal centriole), mitochondria (m), and presence of vesicles (v) in the posterior portion of midpiece, cc = cytoplasmic canal; D: Flagella of spermatozoa of G. aff. carapo in cross section (TEM) showing electron-lucent tubules of each peripheral doublet (arrow); E: Midpiece of spermatozoon of G.aff. carapo in longitudinal section (TEM) showing short cytoplasmatic canal (cc) and vesiclular arrangement (v). Scale bars = 1µm.
FIGURE 5 in Description of three new species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil
FIGURE 5 | Eigenmannia cacuria, MZUSP 125871, holotype, 110.0 mm LEA, riacho Enxada, Alto Parnaíba, Maranhão, 08°51'21"S 45°59'14"W. A. lateral view of head, B. lateral view of body.
FIGURE 6 in Description of three new species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil
FIGURE 6 | Eigenmannia robsoni, MZUSP 125872, holotype, 139.3 mm LEA, rio Parnaíba, Muricí dos Portelas, Piauí, 03°18'24.8"S 42°05'36.2"W. A. lateral view of head, B. lateral view of body.
FIGURE 3 in Description of three new species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil
FIGURE 3 | Osteological elements of Eigenmannia bumba, MZUSP 123709: A. Premaxillae, B. Lower jaw; Eigenmannia cacuria, UFPB 11916: C. Premaxillae, D. Lower jaw; and Eigenmannia robsoni, UFPB 8202: E. Premaxillae, F. Lower jaw.
FIGURE 4 in Description of three new species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil
FIGURE 4 | Map of Northern Brazil showing distribution of Eigenmannia bumba (white), Eigenmannia cacuria (black), and E. robsoni (red). A star indicates the type locality.
FIGURE 1 in Description of three new species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil
FIGURE 1 | Schematic showing the body stripe nomenclature of Peixoto et al. (2015) and Peixoto, Wosiacki (2016).
FIGURE 2 in Description of three new species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil
FIGURE 2 | Eigenmannia bumba, MZUSP 125870, holotype, 117.5 mm LEA, rio Santana, Grajaú, Maranhão, Brazil, 05°35'39.48"S 46°14'30.88"W. A. lateral view of head, B. lateral view of body.
FIGURE 3 in Description of a new species of glass knifefish genus Eigenmannia (Gymnotiformes: Sternopygidae) from the upper rio Paraná basin, based on anatomical, karyotypic, and molecular evidences
FIGURE 3 | Maxilla, suspensorium and opercular series of Eigenmannia catira, paratype, MZUSP 121047, inverted image, left side, medial view, anterior on left.
ScienceDex guides
Understand access before you commit
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.