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.
679
datasets available to search
ShareScore release 0.9.0
Dataset results
679 results for “Crayfishes”
Data from: Introgression threatens the survival of the critically endangered freshwater crayfish Cherax tenuimanus (Decapoda : Parastacidae) in the wild
Hybridization and genetic introgression following the introduction of exotic species can pose a significant threat to the survival of geographically restricted species. A remnant population of the critically endangered freshwater crayfish Cherax tenuimanus in the upper reaches of the Margaret River in southwestern Australia is under threat following the introduction and spread of its congener Cherax cainii. Here, we examine the extent of hybridization and introgression between the two species using twelve polymorphic microsatellite loci. Our study reveals there are three times more C. cainii than C. tenuimanus at our study site in the upper reaches of the Margaret River. There is also evidence of hybridization and introgression between C. tenuimanus and C. cainii at this site, with F1, F2 and backcrossed individuals identified. While interbreeding was confirmed in this study, our simulations suggest that the levels of introgression are much lower than would be expected under random mating, indicating partial reproductive barriers exist. Nevertheless, it is apparent that hybridization and introgression with C. cainii pose a serious threat to C. tenuimanus and their survival in the wild will require active adaptive management and continued genetic monitoring to evaluate management effectiveness.
FIGURE 3 in Astacoides hobbsi, a new crayfish (Crustacea: Decapoda: Parastacidae) from Madagascar
FIGURE 3. Astacoides caldwelli, preserved adult specimens (FMNH 5721); female (left) and male (right) (photo, S. Thurston).
FIGURE 2 in Astacoides hobbsi, a new crayfish (Crustacea: Decapoda: Parastacidae) from Madagascar
FIGURE 2. Astacoides granulimanus, preserved adult specimens (AMNH 17821); female (left) and male (right) (photo, S. Thurston).
FIGURE 1. Astacoides hobbsi, n in Astacoides hobbsi, a new crayfish (Crustacea: Decapoda: Parastacidae) from Madagascar
FIGURE 1. Astacoides hobbsi, n. sp. (all from holotype, FMNH 9912): A, dorsal view of carapace (2x); B, lateral view of carapace (2x); C, dorsal (left) and lateral (right) views of right antennal scale (4x); D, epistome and basal podomeres of antennae (3x); E, sternal area of segments X–XIV and coxae of associated pereopods (2x); F, phallic papilla on coxa of right fifth pereopod (6.5x); G, distal part of basis, ischium, and merus of left third maxilliped (3x); H, dorsal view of dactylus, propodus, carpus, and merus of right cheliped (2x); I, lateral view of abdomen (2x).
Figure 4 in Cambarus loughmani, a new species of crayfish (Decapoda: Cambaridae) endemic to the pre-glacial Teays River Valley in West Virginia, USA
Figure 4. Cambarus loughmani sp. nov.; all taken from holotype male, Form I (NCSM 90082), except E and F from morphotype male, Form II (NCSM 90084), and I from allotype female (NCSM 90083): (a) lateral aspect of carapace; (b–d) mesial and lateral aspect of Form I male gonopod; (e–f) mesial and lateral aspect of Form II male gonopod; (g) ventral aspect of epistome; (h) dorsal aspect of carapace; (i) ventral aspect of annulus ventralis; (j) dorsal aspect of the antennal scale; (k) dorsal aspect of distal podomere of right cheliped. Note that the red lining of the rostrum and purpleish hue of the animal during the time of the photo are a byproduct of recent preservation in ethanol and colours in this plate are not representative of those in life. Photo plate by Dr Guenter Schuster.
Figure 3 in Cambarus loughmani, a new species of crayfish (Decapoda: Cambaridae) endemic to the pre-glacial Teays River Valley in West Virginia, USA
Figure 3. Dorsal view of a female specimen of Cambarus loughmani collected from the type locality, burrows adjacent to Little Island Creek, Lincoln County, West Virginia, displaying typical life colours for the species. Photo by Dr Guenter Schuster.
Figure 5 in Cambarus loughmani, a new species of crayfish (Decapoda: Cambaridae) endemic to the pre-glacial Teays River Valley in West Virginia, USA
Figure 5. Known range of Cambarus loughmani in West Virginia with sites designated by Jezerinac et al. (1995) combined with those collected during the study, and showing introduced population present at Chief Logan State Park.
Figure 1. Sheared principal component analysis plot depicting morphometric variation among Cambarus aff. dubius, C. pauleyi, C in Cambarus loughmani, a new species of crayfish (Decapoda: Cambaridae) endemic to the pre-glacial Teays River Valley in West Virginia, USA
Figure 1. Sheared principal component analysis plot depicting morphometric variation among Cambarus aff. dubius, C. pauleyi, C. loughmani, and nominate C. dubius.
Figure 2 in Cambarus loughmani, a new species of crayfish (Decapoda: Cambaridae) endemic to the pre-glacial Teays River Valley in West Virginia, USA
Figure 2. Bayesian phylogenetic tree based on partial sequences from the mitochondrial COI gene that was generated using the software program MrBayes and using the HKY+G model of sequence evolution. The tree depicts relationships among Cambarus loughmani sp. nov. (in bold) and several other species formerly considered part of the C. dubius species complex. Also represented are other related burrowing crayfish from the genus Cambarus as well as additional taxa from two other genera that are included as outgroups. Numbers at the nodes of the tree indicate Bayesian posterior probabilities.
Figure 3 in Microhabitat use by the white-clawed crayfish in a Tuscan stream
Figure 3. Microhabitat use by crayfish. Calculated electivity scores for water depth (cm), current velocity (m/s), and substrate (1, mud; 2, sand; 3, gravel; 4, pebble/cobble; 5, boulders; 6, bedrock) by class 1 (,60 mm estimated total length) and class 2 (>60 mm estimated total length) individuals. Scores range from 1 (always used) to 21 (always avoided); 0 denotes no use. Asterisk denotes significant deviation from availability (*P,0.05; **P,0.001).
Figure 2 in Microhabitat use by the white-clawed crayfish in a Tuscan stream
Figure 2. Mean percentages of availability (relative to the total studied area) of bank/bed, roots, macrophytes, and boulders.
Figure 1 in Microhabitat use by the white-clawed crayfish in a Tuscan stream
Figure 1. Frequency distribution of the estimated size (total length) of the study crayfish population.
Figure 5 in Microhabitat use by the white-clawed crayfish in a Tuscan stream
Figure 5. Canonical correspondence analysis ordination of three crayfish size classes (small,,30 mm; medium, 30–60 mm; large,>60 mm estimated total length) and environmental variables for the 265 microhabitats.
Figure 4 in Microhabitat use by the white-clawed crayfish in a Tuscan stream
Figure 4. Microhabitat use by crayfish. Calculated electivity scores for bank/bed, roots, macrophytes, and boulders by class 1 (,60 mm estimated total length) and class 2 (>60 mm estimated total length) individuals. Scores range from 1 (always used) to 21 (always avoided); 0 denotes no use. Asterisk denotes significant deviations from availability (*P,0.05; **P,0.001).
FIGURE 1. Cambarus theepiensis n in Cambarus (P.) theepiensis, a new species of crayfish (Decapoda:Cambaridae) from the coalfields region of Eastern Kentucky and Southwestern West Virginia, USA
FIGURE 1. Cambarus theepiensis n. sp.: A. lateral view of carapace; B. lateral (left) and mesial (right) view of left first gonopod of form I male; C. lateral (left) and mesial (right) view of form II male gonopod; D, antennal scale; E. dorsal view of carapace; F. dorsal view of distal podomere of right cheliped of form I male; G. caudal view of in situ form I male gonopods; H. annulus ventralis; I. ischial hook of form I male; J. epistome; A, B, D–G, J, I from holoype; H from allotype; C from morphotype.
FIGURE 11 in Cherax latimanus sp. nov., a new burrow-dwelling freshwater crayfish (Decapoda Parastacidae) from the mid-Murray River catchment, Australia
FIGURE 11. Soil-capped burrow with (upper), and without (lower), embedded sticks, northern Millewa Forest, NSW, 12 January 2017 (Image: Dale McNeil).
FIGURE 10 in Cherax latimanus sp. nov., a new burrow-dwelling freshwater crayfish (Decapoda Parastacidae) from the mid-Murray River catchment, Australia
FIGURE 10. An almost completed burrow cap of moist soil, just north of Euroa and east of Hume Freeway (area now under freeway fuel station), 24/11/2005—note, small foggy patch is moisture on the camera lens (Image: Richard Francis).
FIGURE 9 in Cherax latimanus sp. nov., a new burrow-dwelling freshwater crayfish (Decapoda Parastacidae) from the mid-Murray River catchment, Australia
FIGURE 9. Open entrance to burrow of Cherax latimanus sp. nov., though blocked with a soil plug deeper down, Reedy Lake, Victoria (Image: Robert McCormack).
FIGURE 6 in Cherax latimanus sp. nov., a new burrow-dwelling freshwater crayfish (Decapoda Parastacidae) from the mid-Murray River catchment, Australia
FIGURE 6. Cherax latimanus sp. nov., adult, from Thornton, displaying a) a thin, sparse, band of dorsal mesial propodal marginal setae (white arrow), and distinctive blue colour on side of cephalon (yellow arrow), and b) dense ventral propodal setae (white arrow), and with distinctive blue colour on side of cephalon (yellow arrow) (Images: Robert McCormack).
FIGURE 8 in Cherax latimanus sp. nov., a new burrow-dwelling freshwater crayfish (Decapoda Parastacidae) from the mid-Murray River catchment, Australia
FIGURE 8. Multiple soil-capped burrows (light coloured patches on the ground) of Cherax latimanus sp. nov. surrounding Lake Moira, NSW, 13 August 2009 (Image: Robert McCormack).
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.