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.
6,771
datasets available to search
ShareScore release 0.7.1
Dataset results
6,771 results for “freshwater”
Figure 1 in New taxa of freshwater snails from Macedonia (Gastropoda: Hydrobiidae, Amnicolidae)
Figure 1. Sampling sites of the new hydrobiid species. 1: Spring Šum, 4 km N of Struga; 2: spring SW and E of Golemo Lake (Pelister National Park).
Figure 1 in New subterranean freshwater gastropods of Montenegro (Mollusca: Gastropoda: Hydrobiidae), with description of one new genus and two new species
Figure 1. Iverak spring (Pricelje village, Podgorica). Left (A): spring source with the spring outlet. Right (B): Spring source with deposits emerging from the underground. Photos. V. Pešić
Figure 46. Shell ofBythiospeum demattiai n in New subterranean freshwater gastropods of Montenegro (Mollusca: Gastropoda: Hydrobiidae), with description of one new genus and two new species
Figure 46. Shell ofBythiospeum demattiai n. sp. 4 = holotype, 5 = paratype, 6 = aperture from the lateral view.
FIG. 3 in New clues on the palaeodiversity of the middle Miocene freshwater ichthyofauna from the Tatacoa Desert, Colombia
FIG. 3. — Siluriforms from the Honda Group: A1-A3, complete lapillus otolith (Holotype) of †Sciades maldonadonis n. sp. (VPPLT-832) from the Honda Group. B1-B3, dorsal spine fragment of Ariidae indet. (VPPLT-1108); C1-C3, incomplete neurocranium of Oxydoras sp. (ULA-1316); D-M, Phractocephalus sp.; D, parietosupraoccipital frontal fragment (VPPLT-1272); E, F, parieto-supraoccipital bone fragments; E, VPPLT-1128; F, VPPLT-223; G, pterotic fragment (VPPLT-442); H, sphenotic fragment, VPPLT-421; I, indeterminate fragments, VPPLT-742; J, right pectoral girdle (IGM-s/n°); K-M, pectoral spines fragments; K, M, VPPLT-043; L, ULA-44; N-P, Hoplosternum sp.; N, O, parieto-supraoccipital; N, VPPLT-1453; O, ULA-829; P, left pectoral-fin spine, VPPLT-1250; Q-T, Doradidae indet.; Q, R, parieto-supraoccipital; Q, VPPLT-921; R, ULA-2997; S, T, fragmented pectoral-fin spines; S, VPPLT-43; T, VPPLT-1442; U1, U2, cf. Acanthicus sp., pectoral-fin spine, VPPLT-469; V1, V2, cf. Hypostomus sp., left pectoral-fin spine, VPPLT-504; W, X, Loricariidae indet.; W, skull fragment, VPPLT-1375; X, portion of a caudal fin, ULA-2413. Views: B1, U1, V2, anterior; C1, D-I, N-R, V1, dorsal; A1, dorsal face; C3, left lateral; A3, X, lateral; B2, U2, posterior; B3, J, right lateral; C2, ventral; A2, ventral face; K-M, S-T, W, indet. Abbreviations: acf, anterior cranial fontanel; ad, anterior dentations; adp-cl, anterior dorsal process of cleithrum; cl, cleithrum; fr, frontal; lf, left frontal; lle, left lateral ethmoid; mes, mesethmoid; pas, parasphenoid; pd, posterior dentations; pdp-cl, posterior dorsal process of cleithrum; pp-cl, posterior process of cleithrum; rf, right frontal; rle, right lateral ethmoid; sop, parieto-supraoccipital; vtp, vomeral tooth plate. Scale bars: A, N, V, 6 mm; B, E, F, L, O, Q-S, W, X, 5 mm; C, D, H, I, K, 10 mm; G, 7 mm; J, 20 mm; M, 8 mm; P, 3 mm; T, 4 mm; U, 9 mm.
FIG. 1 in New clues on the palaeodiversity of the middle Miocene freshwater ichthyofauna from the Tatacoa Desert, Colombia
FIG. 1. — Geographical position (A) of the Honda Group's stratigraphic section (B) at La Venta site placed in the Upper Magdalena River Valley, Colombia. For details on the localities' geographic coordinates and stratigraphic position, please see Appendix 2.
F. 6 in New clues on the palaeodiversity of the middle Miocene freshwater ichthyofauna from the Tatacoa Desert, Colombia
F. 6. — Biostratigraphy of the freshwater fishes from the Honda group and palaeoenvironments. The fish fossil record is based on localities presented in Fig. 1B and Appendix. Palaeoenvironments: 1, anastomosing river interpreted by Guerrero (1997), diagram based on Li & Zhang; 2, small meandering stream interpreted by Guerrero (1997) or a sand-bed meandering river interpreted by Mora-Rojas et al.);, braided river interpreted by Villarroel et al. (1996) and Guerrero, influenced by debris flows and catastrophic flood events Mora-Rojas et al.), diagram based on Nichols (2009);, meandering river interpreted by Guerrero (1997) or a gravel-sand meandering fluvial system interpreted by Mora-Rojas et al.); 5, possible distal facies of an alluvial fan or a terminal fan in the distributary zone, suggested by Mora-Rojas et al., diagram based on Peterson.
FIG. 5 in New clues on the palaeodiversity of the middle Miocene freshwater ichthyofauna from the Tatacoa Desert, Colombia
FIG. 5. — Fish palaeodiversity from the middle Miocene Honda Group: A, overall taxa reported in the Honda group by orders, "Osteoglossiformes & others" include Arapaima Müller, 1843 and †Acregoliath Richter, 1989; B, total number of taxa by families and geological unit. The total number of taxa is based on Table 1 and Appendix 1.
FIG. 2 in New clues on the palaeodiversity of the middle Miocene freshwater ichthyofauna from the Tatacoa Desert, Colombia
FIG. 2. — Stingrays (A1-G2) and cichlids (H1-L2) from the Honda Group: A1, A2, cf. Potamotrygon sp. tooth (VPPLT 10000); B1-F, isolated dermal bucklers; B1, B2, VPPLT-1415; C, E, VPPLT-1245; D, VPPLT-1126; F, VPPLT-1239; G1, G2, isolated caudal spines (VPPLT-42) of Potamotrygonidae indet.; H1-H4, left dentary of cf. Astronotus sp. (VPPLT-668A); I1, I2, left dentary of the extant Astronotus ocellatus (Agassiz, 1831) (ANSP s/n); J1-J3, left dentary of cf. Cichla sp. (VPPLT-668B); K1-K3, left dentary of the extant Cichla Bloch & Schneider, 1801 (PIMUZ A/I 4897); L1, L2, indet. cichlid anal spine (VPPLT-1164). Views: L1, anterior; B, C-G1, H3, I2, J3, K3, dorsal; A1, labial; A2, lingual-lateral; H1, I1, J2, K1-K2, left lateral; L2, lateral; B2, profile; H4, J1, right lateral; G2, H2, ventral. Scale bars: A, 0.5 mm; B, 1 cm; C, E, I1, J, K2, 5 mm; D, H, 7 mm; F, K1, L, 6 mm; G, K3, 4 mm; I2, 3 mm.
Data for: Resolving marine–freshwater transitions by diatoms through a fog of gene tree discordance
<p>Despite the obstacles facing marine colonists, most lineages of aquatic organisms have colonized and diversified in freshwaters repeatedly. These transitions can trigger rapid morphological or physiological change and, on longer timescales, lead to increased rates of speciation and extinction. Diatoms are a lineage of ancestrally marine microalgae that have diversified throughout freshwater habitats worldwide. We generated a phylogenomic dataset of genomes and transcriptomes for 59 diatom taxa to resolve freshwater transitions in one lineage, the Thalassiosirales. Although most parts of the species tree were consistently resolved with strong support, we had difficulties resolving a Paleocene radiation, which affected the placement of one freshwater lineage. This and other parts of the tree were characterized by high levels of gene tree discordance caused by incomplete lineage sorting and low phylogenetic signal. Despite differences in species trees inferred from concatenation versus summary methods and codons versus amino acids, traditional methods of ancestral state reconstruction supported six transitions into freshwaters, two of which led to subsequent species diversification. Evidence from gene trees, protein alignments, and diatom life history together suggest that habitat transitions were largely the product of homoplasy rather than hemiplasy, a condition where transitions occur on branches in gene trees not shared with the species tree. Nevertheless, we identified a small set of putatively hemiplasious genes, many of which have been associated with shifts to low salinity, indicating that hemiplasy played a small but potentially important role in freshwater adaptation. Accounting for differences in evolutionary outcomes, in which some taxa became locked into freshwaters while others were able to return to the ocean or become salinity generalists, might help further distinguish different sources of adaptive mutation in freshwater diatoms.</p>
Figure 2 in Mitochondrial 12S rRNA sequences support the existence of a third species of freshwater blackfish (Percicthyidae: Gadopsis) from south-eastern Australia
Figure 2. Phylogenetic trees, using the PAUP software package (Swofford, 1998). A, Maximum parsimony, using a full exhaustive search with 1000 bootstrap replicates. B, Distance analysis, using the neighbour-joining option, bootstrap replicates set at 1000. C, Maximum likelihood, using the Tamura-Nei model with 100 bootstrap replicates.
Data from: Phosphorus storage and utilization strategies of two bloom-forming freshwater cyanobacteria
<p>The inter-relationships between cellular phosphorus (P) storage, dissolved inorganic P (DIP) uptake affinity, alkaline phosphatase activity (APA), and dissolved inorganic nitrogen (DIN) concentrations were studied in two ubiquitous diazotrophic freshwater cyanobacteria, <em>Raphidiopsis raciborskii</em> (six strains) and <em>Chrysosporum ovalisporum</em> (two strains). DIP uptake kinetics were measured using rates of incorporation of the radio-isotope, <sup>33</sup>P, and APA as a proxy for DOP-ester utilization. The study showed that DIP uptake of individual strains followed Michaelis-Menten kinetics (modified in our study to incorporate cellular P quotas), but differed with DIN and P availability, and between growth stages. High-affinity DIP uptake and APA were activated below a P quota threshold of ~0.01 µg P µg<sup>-1</sup> C across the species and strains. <em>C. ovalisporum</em> had significantly higher APA and P quotas (per unit C and cell) but lower uptake affinity than <em>R. raciborskii</em>. Demand for DIP by <em>C.ovalisporum</em> increased when N fixation occurred, but typically not for <em>R.raciborskii</em>. Our results indicate that cyanobacterial species and strains differ in their strategies to P limiting conditions, and highlight the interplay between N and P. Physiological adaptations like APA and diazotrophy of cyanobacteria adapting to low-DIP and/or DIN conditions, may occur simultaneously and drive species dominance in oligotrophic environments.</p>
Fig. 1 in Catch of Coho Salmon (Oncorhynchus kisutch) Infected with the Freshwater Parasite Salvelinema walkeri (Nematoda: Cystidicolidae) in the Gulf of Alaska in the Early Winter
Fig. 1. Locations of salmonid collection along a south-north transect (from 44°32′N to 52°06′N along ca. 145°W) in the Gulf of Alaska in mid-December 1992 and those of salmonids infected with Salvelinema walkeri in marine and estuarine waters based in this and past papers. Open circles, catch locations of infected salmonids; closed circles, locations with salmonid catch; and crosses, locations without salmonid catch. Location 1, 52°06′N, 145°56′W (this paper); location 2, the Columbia River estuary (Claxton et al. 2013); location 3, off Newport, Oregon (Olson 1978); locations 4 and 5, the Strait of Georgia near Nanoose (Margolis 1967a) and Nanaimo (Ekbaum 1935, 1936; Margolis 1967a), respectively; and locations 6–10, Cowichan Bay, Satellite Channel, the Strait of Juan de Fuca, Sechelt Inlet, and Howe Sound, respectively (Godfrey 1968).
Date set for the manuscript: The Role of Sediment Gas Storage in the Methane Dynamics of a Shallow Freshwater Reservoir
<p>The dataset supports the findings of the manuscript entitled: Linking Sediment Gas Storage to the Methane Dynamics in a Shallow Freshwater Reservoir. The manuscript presents results based on in-situ monitoring at the main pre-dam of the Wupper reservoir. The reservoir is located in Germany and the monitoring was conducted from March 2020 to November 2021. The main goal of the monitoring was to measure the spatial variability of methane fluxes and its dynamics in the reservoir. The methane budget of the reservoir was then analysed in combination with estimates of the amount of free gas stored in the sediment matrix, which were derived from acoustic observations. The findings are discussed in the manuscript.</p> <p>Therefore, the dataset provided as an xlsx file includes separate sheets for:</p> <ul> <li>Sediment measurements of potential methane production (PMP), loss on ignition (LOI), dissolved methane (CH<sub>4</sub>) in porewater, carbon and nitrogen content.</li> <li>Gas content in the sediment estimated from maximum acoustic backscatter for 2020 and 2021 for the reservoir spatial grid.</li> <li>Monthly time-series of methane fluxes (oxidation, diffusion, ebullition, and potential flux at the sediment water interface - PSWI) for each monitoring location and for the reservoir (average of all monitoring locations) with the inclusion of degassing at the dam overflow and advective methane transport (Net-export) by inflow and outflow.</li> <li>Time series of daily mean values of ebullition and environmental parameters monitored in the reservoir.</li> </ul> <p>Explanations and units are provided in column labels. NaN refers to missing data.</p> <p>In this version (Version 2), the calculation of the PSWI has been corrected. It is now calculated as the vertically integrated potential methane production over the top 30 cm layer of the sediment.</p>
Dataset on Article: River ecological status is shaped by agricultural land use intensity across Europe: Establishing a typology of farming-driven freshwater impacts
<p>This repository contains raw data from the article "River ecological status is shaped by agricultural land use intensity across Europe: Establishing a typology of farming-driven freshwater impacts" which is currently under review.</p> <p>It contains data to allocate the pressures (<strong>Data_pressure_allocation.csv</strong>) and calculate the Pressure Index (<strong>Data_pressure_index.csv</strong>) for Table 1, and for the Spearman correlations for Figure 2 (<strong>Data_Spearman_correlations.csv</strong>).</p> <p> </p> <p>Also available is the Shapefile used for the different agricultural maps (Figure 1 and Figure S1-S4):</p> <p><strong>Shapefile Schürings_et_al._2023</strong> (Coordinate system: ETRS 1989 UTM Zone 32N)</p> <p><strong>Attribute description</strong></p> <p>Id - Identifier of polygons</p> <p>gridcode - Code of agricultural archetypes of Levers et al., (2018)</p> <p>M_ZHYD: Unique identifier of corresponding FEC</p> <p>mars_bt12: River types</p> <p>eco_stat_2: Ecological status</p> <p>Biogeoregi: Biogeographical Regions - AN = Northern and Highland, Temp = Temperate, Mediterranean = Mediterranean</p> <p>Cum_pressu: Agricultural pressure index</p> <p>Nitrogen: Agricultural nitrogen pressure</p> <p>Pesticides: Agricultural pesticide pressure</p> <p>Hydromorph: Agricultural hydromorphological pressure</p> <p>Water_abst: Agricultural water abstraction</p>
Fig. 22 in Some nematodes from freshwater fishes in central Africa
Fig. 22. Cucullanus congolensis sp. n. from Auchenoglanis occidentalis (Valenciennes). A – anterior end of female, dorsoventral view; B – anterior end of male, lateral view; C – cephalic end of male, apical view; D – tail of female, lateral view; E – deirid; F – tail of male, lateral view; G – posterior end of male, lateral view; H – tail of male, ventral view.
Fig. 14 in Some nematodes from freshwater fishes in central Africa
Fig. 14. Gendria sanghaensis sp. n. from Schilbe marmoratus Boulenger, scanning electron micrographs. A, B – cephalic end of male, subapical and apical views (arrow indicates protruding oesophageal tooth); C – row of denticles in mouth, ventral view; D – anterior end of male, ventral view (arrow indicates deirid); E – deirid; F – tail of female, lateral view. Abbreviations: a – amphid; b – two submedian cephalic papillae; c – cephalic vesicle; e – phasmid; f – anus.
Fig. 13 in Some nematodes from freshwater fishes in central Africa
Fig. 13. Gendria sanghaensis sp. n. from Schilbe marmoratus Boulenger. A – anterior end of female, sublateral view; B – same, enlarged; C, D – cephalic end of female, lateral and apical views, respectively; E – tail of female, lateral view; F – posterior end of male, lateral view; G – egg; H – vulva, lateral view.
Fig. 25 in Some nematodes from freshwater fishes in central Africa
Fig. 25. Dujardinascaris malapteruri (Baylis, 1923) from Malapterurus monsembeensis Roberts, scanning electron micrographs of female. A – cephalic end, apical view; B – inner side of dorsal lip, subterminal view; C – dorsal lip, dorsal view; D – subventral lip, subventral view; E – cephalic end, ventral view; F – detail of body cuticle; G – tail, sublateral view. Abbreviations: b – double labial papilla; c – single labial papilla; d – dorsal lip; i – interlabium; s – subventral lip.
Fig. 11 in Some nematodes from freshwater fishes in central Africa
Fig. 11. Gendria longispiculata sp. n. from Schilbe grenfelli (Boulenger), scanning electron micrographs of male. A – anterior end of body, lateral view; B, C – cephalic end, apical and sublateral views, respectively; D – edge of oral aperture with row of denticles; E – same, enlarged denticles; F – deirid; G – posterior end of male, ventrolateral view; H – anterior portion of body, lateral view (arrow indicates deirid). Abbreviations: a – amphid; b – cephalic papilla of outer circle; c – cephalic papilla of inner circle; d – ventral sucker; o – oral aperture; v – cephalic vesicle.
Fig. 16 in Some nematodes from freshwater fishes in central Africa
Fig. 16. Gendria sp. from Pantodon buchholzi from Pantodon buchholzi Peters, male. A, B, C – anterior end of body, lateral, ventral and sub-dorsoventral views, respectively (internal structures not illustrated in B); D, E – cephalic end, apical and sub-dorsoventral views, respectively.
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.