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.
15
datasets available to search
ShareScore release 0.9.0
Dataset results
15 results for “Freshwater mollusks”
Fig. 2 in Circulation Pathways Of Trematodes Of Freshwater Gastropod Mollusks In Forest Biocenoses Of The Ukrainian Polissia
Fig. 2. Two-host life cycles of trematodes: а — alternation hosts; b — proportion of different classes of definitive hosts in life cycles.
Fig. 3 in Circulation Pathways Of Trematodes Of Freshwater Gastropod Mollusks In Forest Biocenoses Of The Ukrainian Polissia
Fig. 3. Three-host life cycle of trematodes: А — second intermediate hosts are aquatic invertebrates; В — second intermediate hosts are amphibiontic invertebrates; С — second intermediate hosts are vertebrates; а — alternation hosts; b — biological structure of helminth fauna.
Fig. 2 in Submicroscopic Changes In The Hepatopancreas Of Freshwater Mollusks Infected With Parthenites Of Trematodes Echinoparyphium Aconiatum (Echinostomida) And Plagiorchis Elegans (Plagiorchiida)
Fig. 2. Changes in the cells of the L. stagnalis hepatopancreas acinus with a high degree of invasion with parthenitis: A: Walls of a hepatopancreas acinus of a mollusk infected with E. aconiatum: 1 — collagen fibers; 2 — hepatic cell; 3 — lime cells; 4 — karyorrhexis. (Electronogram ×1000); B: hepatic cells of the hepatopancreas of a mollusk infected with E. aconiatum: 1 — fragments of a destroyed hepatic cell. (Electronogram ×10000); C: Lime cells of the hepatopancreas of the mollusk infected with P. elegans: 1 — interlobular fibrous connective tissue; 2 — hepatic cell; 3 — lime cell. (Electronogram × 6500); D: Cells of the hepatopancreas acinus of the mollusk infected with P. elegans: 1 — hepatic cell; 2 — lime cell. (Electronogram ×15000).
Fig. 1 in Submicroscopic Changes In The Hepatopancreas Of Freshwater Mollusks Infected With Parthenites Of Trematodes Echinoparyphium Aconiatum (Echinostomida) And Plagiorchis Elegans (Plagiorchiida)
Fig. 1. Acinus of L. stagnalis hepatopancreas: A: Cells of L. stagnalis hepatopancreas acinus: 1 — hepatic cell; 2 — lime cell. (Electronogram ×4800); B: Hepatic and lime cells of a L. stagnalis hepatopancreas fragment undamaged by trematode parthenitis: 1 — hepatic cell; 2 — nucleus; 3 — heterochromatin; 4 — pore in the nuclear envelope; 5 — perinuclear space; 6 — the lumen of the acinus; 7 — lime cell; 8 — the nucleus of the lime cell. (Electronogram ×13000).
Рис. 8. Фрагменты раковин пресноводных моллюсков иЗ раскопов поселениЯ Константиновка-1: А, B – створка жемчужницы иЗ раскопа 1, вид снаружи и иЗнутри; C–E – створки жемчужниц Dahurinaia dahurica иЗ раскопа 2; F, G – фрагмент раковины гастроподы иЗ раскопа 2, вид с раЗных ракурсов. Масштабные линейки 2 см. Fig. 8. Fragments of freshwater mollusk shells from the Konstantinovka-1 site excavations: A, B – pearl mussel Dahurinaia dahurica from excavation 1, the inner and outer views; C–E – pearl mussel Dahurinaia dahurica from excavation 2; F, G – fragment of a gastropod shell from excavation 2, view from different angles. Scale bars 2 cm. in Mollusks from the archaeological site Konstantinovka-1 in Primorye (Russian Far East)
Рис. 8. Фрагменты раковин пресноводных моллюсков иЗ раскопов поселениЯ Константиновка-1: А, B – створка жемчужницы иЗ раскопа 1, вид снаружи и иЗнутри; C–E – створки жемчужниц Dahurinaia dahurica иЗ раскопа 2; F, G – фрагмент раковины гастроподы иЗ раскопа 2, вид с раЗных ракурсов. Масштабные линейки 2 см. Fig. 8. Fragments of freshwater mollusk shells from the Konstantinovka-1 site excavations: A, B – pearl mussel Dahurinaia dahurica from excavation 1, the inner and outer views; C–E – pearl mussel Dahurinaia dahurica from excavation 2; F, G – fragment of a gastropod shell from excavation 2, view from different angles. Scale bars 2 cm.
Linked collectors and determiners for: UT-CO Freshwater Mollusks Survey.
Natural history specimen data linked to collectors and determiners held within, "UT-CO Freshwater Mollusks Survey". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/63f086f6-1ce8-4338-a25d-7d298cfa2789">https://bionomia.net/dataset/63f086f6-1ce8-4338-a25d-7d298cfa2789</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/63f086f6-1ce8-4338-a25d-7d298cfa2789">https://gbif.org/dataset/63f086f6-1ce8-4338-a25d-7d298cfa2789</a>. Formatted as a Frictionless Data package.
Supplementary data for: simultaneous species detection and discovery with environmental DNA metabarcoding: a freshwater mollusk case study
<p>Environmental DNA (eDNA) sampling is a powerful tool for rapidly characterizing biodiversity patterns for specious, cryptic taxa with incomplete taxonomies. One such group that are also of high conservation concern are North American freshwater gastropods. In particular, springsnails of the genus <em>Pyrgulopsis</em> (Family: Hydrobiidae) are prevalent throughout the western United States where >140 species have been described. Many of the described species are narrow endemics known from a single spring or locality and it is believed that there are likely many additional species which have yet to be described. The distribution of these species across the landscape is of interest because habitat loss and degradation, climate change, groundwater mining, and pollution have resulted in springsnail imperilment rates as high as 92%. Determining distributions with conventional sampling methods is limited by the fact that these snails are often <5 mm in length with few distinguishing morphological characters, making them both difficult to detect and to identify. In order to facilitate detection of <em>Pyrgulopsis</em> we developed an eDNA metabarcoding protocol that is both inexpensive and capable of rapid, accurate detection of all known <em>Pyrgulopsis</em> species. When compared with conventional collection techniques, our pipeline consistently resulted in detection at sites previously known to contain <em>Pyrgulopsis </em>springsnails and at a cost per site that is likely to be substantially less than the conventional sampling and individual barcoding that has been done historically. Additionally, because our method uses eDNA extracted from filtered water it is non-destructive and suitable for the detection of endangered species where "no take" restrictions may be in effect. This effort represents both a tool which is immediately applicable to a group of high conservation concern across western North America and a case study in the broader application of eDNA sampling for landscape assessments of cryptic taxa of conservation concern.</p>
Fig. 5 in Circulation Pathways Of Trematodes Of Freshwater Gastropod Mollusks In Forest Biocenoses Of The Ukrainian Polissia
Fig. 5. The ratio of studied trematode species according to the classes of definitive hosts.
Fig. 4 in Circulation Pathways Of Trematodes Of Freshwater Gastropod Mollusks In Forest Biocenoses Of The Ukrainian Polissia
Fig. 4. Four-host life cycles of trematodes.
Fig. 1 in Circulation Pathways Of Trematodes Of Freshwater Gastropod Mollusks In Forest Biocenoses Of The Ukrainian Polissia
Fig. 1. Points — location of mollusc collection sites (ponds of Ukrainian Polissia).
Supplementary data for: simultaneous species detection and discovery with environmental DNA metabarcoding: a freshwater mollusk case study
Open the record for dataset details and reuse information.
Data from: Live, dead, and fossil mollusks in Florida freshwater springs and spring-fed rivers: taphonomic pathways and the formation of multi-sourced, time-averaged death assemblages
Taphonomic processes are informative about the magnitude and timing of paleoecological changes but remain poorly understood with respect to freshwater invertebrates in spring-fed rivers and streams. We compared taphonomic alteration among freshwater gastropods in live, dead (surficial shell accumulations), and fossil (late Pleistocene-early Holocene in situ sediments) assemblages from two Florida spring-fed systems, the Wakulla and Silver/Ocklawaha Rivers. We assessed taphonomy of two gastropod species: the native <i>Elimia floridensis</i> (n=2504) and introduced <i>Melanoides tuberculata</i> (n=168). We quantified seven taphonomic attributes (aperture condition, color, fragmentation, abrasion, juvenile spire condition, dissolution, and exterior luster) and combined those attributes into a total taphonomic score (TT). Fossil <i>E. floridensis</i> specimens exhibited the greatest degradation (highest TT scores), whereas live specimens of both species were least degraded. Specimens of <i>E. floridensis</i> from death assemblages were less altered than fossil specimens of the same species. Within death assemblages, specimens of <i>M. tuberculata</i> were significantly less altered than specimens of <i>E. floridensis</i>, but highly degraded specimens dominated in both species. Radiocarbon dates on fossils clustered between 9792 and 7087 cal. BP, whereas death assemblage ages ranged from 10,692 to 1173 cal. BP. Possible explanations for the observed taphonomic patterns include: (1) rapid taphonomic shell alteration, (2) prolonged near-surface exposure to moderate alteration rates, and/or (3) introduction of reworked fossil shells into surficial assemblages. Combined radiocarbon dates and taphonomic analyses suggest that all these processes may have played a role in death assemblage formation. In these fluvial settings, shell accumulations develop as a complex mixture of specimens derived from multiple sources and characterized by multi-millennial time averaging. These findings suggest that, when available, fossil assemblages may be more appropriate than death assemblages for assessing pre-industrial faunal associations and recent anthropogenic changes in freshwater ecosystems.
Data from: The effects of nutrient enrichment and invasive mollusks on freshwater environments
<p><span><span><span><span><span><span><span><span><span><span><span>The effects of invasive species might be altered by anthropogenic activities such as nutrient pollution or the presence of additional invasive species with similar or unique traits. Using experimental mesocosms, we tested the separate and combined effects of three invasive mollusks (zebra mussels, Asian clams, and banded mystery snails) on freshwater environments in nutrient-poor and nutrient-enriched conditions. We predicted that in nutrient-poor conditions, single mollusk species would reduce the abundance of algae and zooplankton, but nutrient enrichment would mitigate these effects. Regardless of nutrient additions, paired bivalve species would reduce phytoplankton and zooplankton abundance, increasing periphyton biomass. Bivalves and snails paired together would reduce periphyton, phytoplankton, and zooplankton compared to communities with paired bivalve species. Finally, nutrient enrichment would increase the survival or biomass of paired bivalves and snails. Single, paired, and three co-occurring invasive mollusks did not affect algae or zooplankton abundance. Banded mystery snails reduced nutrient concentrations in high-nutrient conditions more than other invasive species, but the reduced nutrients did not affect algal abundance. Paired invasive species did not affect the survival or biomass of other invasive species. Nutrient enrichment increased the biomass of zebra mussels and mystery snails, but not Asian clams. Additionally, zebra mussel reproduction increased in the high nutrient treatment when banded mystery snails were present, but not when all three species were together. We conclude that human-induced trophic states might determine the effects that single and multiple invasive species have in freshwater environments. </span></span></span></span></span></span></span></span></span></span></span></p>
Data from: The effects of nutrient enrichment and invasive mollusks on freshwater environments
Open the record for dataset details and reuse information.
Data from: Live, dead, and fossil mollusks in Florida freshwater springs and spring-fed rivers: taphonomic pathways and the formation of multi-sourced, time-averaged death assemblages
Open the record for dataset details and reuse information.
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.