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.
629
datasets available to search
ShareScore release 0.9.0
Dataset results
629 results for “continental shelf”
Data from: Do freshwater ecoregions and continental shelf width predict patterns of historical gene flow in the freshwater fish Poecilia butleri?
We examined historical patterns of gene flow in the freshwater fish Poecilia butleri in western Mexico. We tested the hypothesis that the boundaries between four freshwater ecological communities (ecoregions) might have limited the movement of P. butleri because changes in species compositions might restrict establishment between adjacent ecoregions, even in situations where a physical barrier is absent. Hence, we predicted that boundaries between ecoregions should correspond to phylogeographical breaks in P. butleri. We also tested the hypothesis that the width of the continental shelf affected historical gene flow in P. butleri because a broad continental shelf provides a greater opportunity for rivers to coalesce during historical episodes of low sea levels as opposed to a narrow continental shelf that should restrict the potential for gene flow among adjacent rivers. Hence, we predicted greater amounts of historical gene flow among neighbouring river basins in the region of western Mexico where the continental shelf is wider, whereas, in the region where the continental shelf is narrower, we expected to detect limited levels of historical gene flow. We analyzed mitochondrial DNA sequence data (cytochrome b) taken from 264 individuals of P. butleri collected from 34 locations distributed across four different ecoregions in western Mexico. To examine patterns of phylogenetic diversification and historical gene flow in P. butleri, we employed several analytical approaches, including traditional tree-based phylogenetic analyses (likelihood and parsimony), haplotype network reconstruction, analyses of molecular variance, and spatial analysis of molecular variance. We found genetic breaks coinciding with two out of three different ecoregion boundaries, suggesting limited historical gene flow. In addition to different species compositions between these adjacent ecoregions, geological features such as the Trans-Mexican Volcanic Belt and the mountainous topography in south-western Mexico, likely contributed to these observed genetic breaks. By contrast, no genetic break was evident between two other ecoregions, a result that partially rejects our first hypothesis. Several results were consistent with our second hypothesis. Changes in the width of the continental shelf in western Mexico are associated with the observed patterns of historical gene flow. Our results indicate that the interactions among multiple geological and biological factors affect the spatial patterns of genetic diversity of widespread freshwater species.
FIGURE 1 in Hydroids (Cnidaria, Hydrozoa) collected on the continental shelf of Brazil during the Geomar X Oceanographic Operation
FIGURE 1. Map of part of the northeastern and southeastern coast of Brazil, showing the locations of the collection stations
FIGURE 3 in Hydroids (Cnidaria, Hydrozoa) collected on the continental shelf of Brazil during the Geomar X Oceanographic Operation
FIGURE 3. List of the species reported for the first time from the Brazilian continental shelf: fam. Plumulariidae (A) Nemertesia antennina (a=whole colony; b=female gonotheca); fam. Sertulariidae (B) Salacia desmoides, (C) Sertularella polyzonias; fam. Syntheciidae (D) Hincksella cylindrica (a=whole colony; b, c=male gonothecae on hydrorhizae). Bar = 500 m
FIGURE 2 in Hydroids (Cnidaria, Hydrozoa) collected on the continental shelf of Brazil during the Geomar X Oceanographic Operation
FIGURE 2. List of the species reported for the first time from the Brazilian continental shelf: fam. Halopterididae (A) Antennella campanulaformis, (B) Antennella curvitheca, (C) Antennella quadriaurita; fam. Lafoeidae (D) Lafoea dumosa. Bar: A, C, D = 500 m; B = 200 m
Data from: The role of continental shelf width in determining freshwater phylogeographic patterns in southeastern Australian pygmy perches (Teleostei: Percichthyidae)
Biogeographic patterns displayed by obligate freshwater organisms are intimately related to the nature and extent of connectivity between suitable habitats. Two of the more significant barriers to freshwater connections are seawater and major drainage divides. South-eastern Australia provides a contrast between these barriers as it has discrete areas that are likely influenced to a greater or lesser extent by each barrier type. We use continental shelf width as a proxy for the potential degree of river coalescence during low sea levels. Our specific hypothesis is that the degree of phylogeographic divergence between coastal river basins should correspond to the continental shelf width of each region. This predicts that genetic divergences between river basins should be lowest in regions with a wider continental shelf and that regions with similar continental shelf width should have similar genetic divergences. Pygmy perches (Nannoperca australis and Nannoperca 'flindersi') in south-eastern Australia provide an ideal opportunity to test these biogeographic hypotheses. Phylogeographic patterns were examined based on range-wide sampling of 82 populations for cytochrome b and 23 polymorphic allozyme loci. Our results recovered only limited support for our continental shelf width hypothesis, although patterns within Bass clade were largely congruent with reconstructed low sea-level drainage patterns. In addition, we identified several instances of drainage divide crossings, typically associated with low elevational differences. Our results demonstrate high levels of genetic heterogeneity with important conservation implications, especially for declining populations in the Murray–Darling Basin and a highly restricted disjunct population in Ansons River, Tasmania.
FIGURE 2. Bathytanais culterformis, female paratype. A in A new tanaidacean subfamily, Bathytanaidinae (Crustacea: Paratanaididae), from the Australian continental shelf and slope
FIGURE 2. Bathytanais culterformis, female paratype. A) Pereopod 1. B) Pereopod 2. C) Pereopod 3. D) Pereopod 4. E) Pereopod 5. F) Pereopod 6. G) Pleopod. H) Uropod.
FIGURE 1. Bathytanais culterformis, female. A holotype, BL dissected paratype. A in A new tanaidacean subfamily, Bathytanaidinae (Crustacea: Paratanaididae), from the Australian continental shelf and slope
FIGURE 1. Bathytanais culterformis, female. A holotype, BL dissected paratype. A) Dorsal view. B) Cephalothorax. C) Antennule. D) Antenna. E) Labrum. F) Left mandible. G) Right mandible. H) Labium. I) Maxillule and maxilla. J) Maxilliped. K) Epignath. L) Cheliped.
FIGURE 7 in A new tanaidacean subfamily, Bathytanaidinae (Crustacea: Paratanaididae), from the Australian continental shelf and slope
FIGURE 7. Bathytanais fragilis, female paratype, scale bar AF 0.25 mm, GH 0.1 mm. A) Pereopod 1. B) Pereopod 2. C) Pereopod 3. D) Pereopod 4. E) Pereopod 5. F) Pereopod 6. G) Pleopod. H) Uropod.
FIGURE 4. Bathytanais arenamans, female paratype. A in A new tanaidacean subfamily, Bathytanaidinae (Crustacea: Paratanaididae), from the Australian continental shelf and slope
FIGURE 4. Bathytanais arenamans, female paratype. A) Pereopod 1. B) Pereopod 2. C) Pereopod 3. D) Pereopod 4. E) Pereopod 5. F) Pereopod 6. G) Pleopod. H) Uropod.
FIGURE 3. Bathytanais. arenamans, female A holotype, BL dissected paratype. A in A new tanaidacean subfamily, Bathytanaidinae (Crustacea: Paratanaididae), from the Australian continental shelf and slope
FIGURE 3. Bathytanais. arenamans, female A holotype, BL dissected paratype. A) Dorsal view. B) Cephalothorax. C) Antennule. D) Antenna. E) Labrum. F) Left mandible. G) Right mandible. H) Maxillule. I) Maxilla. J) Labium K) Maxilliped. L) Cheliped.
FIGURE 6. Bathytanais fragilis, female paratype scale bars AB 1 in A new tanaidacean subfamily, Bathytanaidinae (Crustacea: Paratanaididae), from the Australian continental shelf and slope
FIGURE 6. Bathytanais fragilis, female paratype scale bars AB 1 mm, EI 0.02 mm, J 0.5 mm. A) Antennule. B) Antenna. C) Labrum. D, Labium. E) Left mandible. F) Right mandible. G) Maxillule. H) Maxilla. I) Maxilliped. J) Cheliped. K) Cheliped propodus.
FIGURE 8. Pseudobathytanais gibberosus, female. A in A new tanaidacean subfamily, Bathytanaidinae (Crustacea: Paratanaididae), from the Australian continental shelf and slope
FIGURE 8. Pseudobathytanais gibberosus, female. A + B holotype, C paratype. A) Dorsal view. B) Lateral view. C) Cephalothorax. D) Anterior directed spine on pleonite 1. E) Left mandible. F) Bucal cavity. G) Antennule. H) Antenna. I) Maxillule, maxilla and epignath. J) Maxilliped. K)
FIGURE 5 in A new tanaidacean subfamily, Bathytanaidinae (Crustacea: Paratanaididae), from the Australian continental shelf and slope
FIGURE 5. Bathytanais fragilis, holotype, female scale bar 2.5 mm. A) Dorsal view. B) Lateral view. C) Pleotelson. D) Cephalothorax.
FIGURE 27. Leptochela serratorbita Bate, 1888 in Caridea (Crustacea, Decapoda) collected on the Brazilian (13 / 22 S) continental shelf and slope
FIGURE 27. Leptochela serratorbita Bate, 1888, male, 3mm, MNRJ 19461; A. endopod and exopod of right first pleopod, lateral view; B. endopod of right first pleopod, lateral view; C. appendix interna and masculina, endopod of right second pleopod; D. telson and uropods, dorsal view.
FIGURE 26. Leptochela serratorbita Bate, 1888 in Caridea (Crustacea, Decapoda) collected on the Brazilian (13 / 22 S) continental shelf and slope
FIGURE 26. Leptochela serratorbita Bate, 1888, male, 3mm, MNRJ 19461; A. right pereopod 3, lateral view; B. right pereopod 4, lateral view; C. right pereopod 5, lateral view.
FIGURE 24. Leptochela serratorbita Bate, 1888 in Caridea (Crustacea, Decapoda) collected on the Brazilian (13 / 22 S) continental shelf and slope
FIGURE 24. Leptochela serratorbita Bate, 1888, male, 3mm, MNRJ 19461; A. left mandible; B. left maxilla 1; C. left maxilla 2; D. left maxilliped 1; E. left maxilliped 2; F. left maxilliped 3.
FIGURE 25. Leptochela serratorbita Bate, 1888 in Caridea (Crustacea, Decapoda) collected on the Brazilian (13 / 22 S) continental shelf and slope
FIGURE 25. Leptochela serratorbita Bate, 1888, male, 3mm, MNRJ 19461; A. right pereopod 1, lateral view; B. right pereopod 2, lateral view.
FIGURE 23. Leptochela serratorbita Bate, 1888 in Caridea (Crustacea, Decapoda) collected on the Brazilian (13 / 22 S) continental shelf and slope
FIGURE 23. Leptochela serratorbita Bate, 1888, male, 3mm, MNRJ 19461; A. lateral view; B. right antennule, dorsal view; C. right antenna, dorsal view (as — antennal spine; st — stylocerite).
FIGURE 22. Pontonia manningi Fransen, 2000 in Caridea (Crustacea, Decapoda) collected on the Brazilian (13 / 22 S) continental shelf and slope
FIGURE 22. Pontonia manningi Fransen, 2000, male, 3mm, MNRJ 19460; A. endopod of right first pleopod, lateral view; B. appendix interna and masculina, endopod of right second pleopod; C. telson and uropods, dorsal view.
FIGURE 21. Pontonia manningi Fransen, 2000 in Caridea (Crustacea, Decapoda) collected on the Brazilian (13 / 22 S) continental shelf and slope
FIGURE 21. Pontonia manningi Fransen, 2000, male, 3mm, MNRJ 19460; A. right pereopod 1, lateral view; B. right pereopod 2, lateral view; C. right pereopod 3, lateral view; D. right pereopod 4, lateral view; E. right pereopod 5, lateral view.
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.