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733 results for “Ryukyu Islands”
Fig. 8 in Two New Species of Composetia (Annelida: Nereididae) from Small Estuaries in the Ryukyu Islands, Southern Japan, with a List of All Species Currently Belonging to Composetia
Fig. 8. Chaetae of Composetia tokashikiensis sp. nov. A–C, chaetae in parapodium 5 of the holotype (NSMT-Pol H-774): A, homogomph spiniger of notochaetae; B, heterogomph spiniger with short blade from upper neurochaetal bundle; C, heterogomph spiniger with long blade from lower neurochaetal bundle (upper position). D, E, chaetae in parapodium 43 of paratype (NSMT-Pol P-775): D, heterogomph spiniger with short blade from lower neurochaetal bundle (lower position); E, heterogomph falciger from lower neurochaetal bundle. Scale bar: 0.05 mm.
Fig. 5 in Two New Species of Composetia (Annelida: Nereididae) from Small Estuaries in the Ryukyu Islands, Southern Japan, with a List of All Species Currently Belonging to Composetia
Fig. 5. Landscape of the type locality of Composetia kumensis sp. nov. at the uplifted coral reef at Gushicha Gusuku on Kume-jima island (photographed on 22 November 2013). A, overview of the uplifted coral reef around the sampling site; B, the sampling site in a small creek originating from a freshwater spring (arrow) in the upper intertidal zone of the uplifted coral reef, surrounded by saltmarsh vegetation. Scale bar in B: 1 m.
Fig. 3 in Two New Species of Composetia (Annelida: Nereididae) from Small Estuaries in the Ryukyu Islands, Southern Japan, with a List of All Species Currently Belonging to Composetia
Fig. 3. Chaetae in chaetiger 20 of paratype (NSMT-Pol P-771) of Composetia kumensis sp. nov. A, homogomph spiniger from notochaetae; B, heterogomph spiniger from lower neurochaetae; C, heterogomph falciger from upper neurochaetae. Scale bar: 0.05 mm.
Fig. 7 in Two New Species of Composetia (Annelida: Nereididae) from Small Estuaries in the Ryukyu Islands, Southern Japan, with a List of All Species Currently Belonging to Composetia
Fig. 7. Composetia tokashikiensis sp. nov. A–C, paratype (NSMT-Pol P-775): A, dorsal views of prostomium and peristomium; B, dorsal view of the everted proboscis; C, ventral view of the everted proboscis. D–G, holotype (NSMT-Pol H-774): D, posterior view of right parapodium 1; E, posterior view of right parapodium 5; F, anterior view of right parapodium 5; G, posterior view of right parapodium 32. H, posterior view of right parapodium 51 of the paratype (NSMT-Pol P-775). Arrow indicates a notoacicular process. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1 mm (A–C); 0.1 mm (D–H).
Fig. 4 in Two New Species of Composetia (Annelida: Nereididae) from Small Estuaries in the Ryukyu Islands, Southern Japan, with a List of All Species Currently Belonging to Composetia
Fig. 4. Schematic diagrams of chaetal arrangement in distal view of right parapodium around chaetiger 5. A, Composetia kumensis sp. nov. B, C. tokashikiensis sp. nov. Closed circles: homogomph spinigers. Closed squares: heterogomph spinigers. Closed stars: heterogomph falcigers. Asterisks indicate that few heterogomph falcigers are sometimes present. Abbreviations: dc, dorsal cirrus; i, neuropodial inferior lobe; ne, neuroacicula; nea, neuropodial acicular ligule; nev, neuropodial ventral ligule; no, notoacicula; nod, notopodial dorsal ligule; np, notoacicular process; nov, notopodial ventral ligule; po, neuropodial postchaetal lobe; vc, ventral cirrus.
Fig. 6 in Two New Species of Composetia (Annelida: Nereididae) from Small Estuaries in the Ryukyu Islands, Southern Japan, with a List of All Species Currently Belonging to Composetia
Fig. 6. Composetia tokashikiensis sp. nov. A, dorsal view of the whole body of the preserved specimen of holotype (NSMT-Pol H-774). Arrow indicates the enlarged oral ring of the everted proboscis. B–D, anterior end of a paratype (NSMT-Pol P-783): B, dorsal view of prostomium, peristomium, and anterior chaetigers; C, dorsal view of the everted proboscis; D, ventral view of the everted proboscis. E, landscape of the type locality at the upper reaches of a small estuary in the Tokashiki-gawa river in Tokashiki-jima island (photographed on 27 May 2012). Scale bars: 1 mm (A); 0.5 mm (B–D).
Fig. 1 in Two New Species of Composetia (Annelida: Nereididae) from Small Estuaries in the Ryukyu Islands, Southern Japan, with a List of All Species Currently Belonging to Composetia
Fig. 1. Composetia kumensis sp. nov. A, dorsal view of the whole body of the preserved specimen of holotype (NSMT-Pol H-766). Arrow indicates the enlarged oral ring of the everted proboscis. B, C, paratype (NSMT-Pol P-772): B, dorsal view of the anterior body of a live specimen; C, dorsal view of anterior end of the preserved specimen. D, Jaw of paratype (NSMT-Pol P-773). Scale bars: 1 mm (A, B); 0.5 mm (C); 0.1 mm (D).
FIGURE 1 in Amamiku, a new genus for the true freshwater crab, Candidiopotamon amamense Minei, 1973 (Decapoda: Brachyura: Potamidae), from the Central Ryukyu Islands, Japan
FIGURE 1. Amamiku amamensis (Minei, 1973) and Candidiopotamon okinawense Minei, 1973. A, Amamiku amamensis (Minei, 1973); B, Candidiopotamon okinawense Minei, 1973; 1, photograph; 2, dorsal view; 3, frontal view. A 1, RUMFZC 99, male, CL 15.2 mm; A 2, 3, ZLKUm. 1086, holotype, male, CL 21.9 mm; B 1, RUMFZC 154, male, CL 30.6 mm; B 2, 3, ZLKU m. 1104, holotype, male, CL 36.2 mm. Scales: 10 mm.
Data from: Seasonal diet partition among top predators of a small island, Iriomotejima island in the Ryukyu Archipelago, Japan
<p>In general, small islands lack predators because species at higher trophic levels often cannot survive. However, two predators—the Iriomote cat <em>Prionailurus bengalensis iriomotensis</em>, and the Crested Serpent Eagle<em> Spilornis cheela perplexus</em>—live on Iriomotejima Island in the Ryukyu Archipelago, which covers an area of approximately 284 square kilometers. To understand how these two top predators coexist on such a small island with limited resources, we focused on their seasonal feeding habits which are considered crucial for survival in such an island ecosystem. To compare the diets of the Iriomote cat and Crested Serpent Eagle, we used DNA metabarcoding analysis of their fecal samples. In the summer, we identified 16 prey items from Iriomote cat fecal samples, and 15 Crested Serpent Eagle fecal samples. In the winter, we identified 37 and 14 prey items, respectively. Using a non-metric multidimensional scaling (NMDS) and a permutational multivariate analysis of variance (PERMANOVA), our study reveals significant differences in the diet composition at the order level between the predators during both seasons. Furthermore, although some prey items at the species-to-order level overlapped between the two predators, the frequency of occurrence of most prey items differed between them in both seasons. These results suggest that this difference in diets was one of the reasons why the Iriomote cat and the Crested Serpent Eagle coexisted on such a small island.</p>
Fig. 1 in First Japanese Records of the Flounders Pseudorhombus elevatus and P. quinquocellatus (Teleostei: Paralichthyidae) from Okinawa Island, Ryukyu Islands
Fig. 1. Preserved (A, B, D) and fresh (C) specimens of Pseudorhombus elevatus. A, KAUM–I. 55230, 118.4 mm SL, Okinawa Island, Japan; B, KAUM–I. 55656, 39.0 mm SL, Okinawa Island, Japan; C, KAUM–I. 105148, 110.5 mm SL, Terengganu, Malaysia; D, QM I.1569, holotype of P. elevatus, 120.5 mm SL, Queensland, Australia (photo by J. Johnson).
Fig. 4 in First Japanese Records of the Flounders Pseudorhombus elevatus and P. quinquocellatus (Teleostei: Paralichthyidae) from Okinawa Island, Ryukyu Islands
Fig. 4. Dorsal-fin origin (D), anterior (AN) and posterior (PN) nostrils on blind side of Pseudorhombus elevatus (A, B) and P. quinquocellatus (C) from Okinawa Island, Japan (B, C: schematic drawings). A, KAUM–I. 55230, 118.4 mm SL; B, KAUM–I. 55641, 41.1 mm SL; C, OCF-P 10720, 55.5 mm SL. Bars indicate 2 mm.
Fig. 3 in First Japanese Records of the Flounders Pseudorhombus elevatus and P. quinquocellatus (Teleostei: Paralichthyidae) from Okinawa Island, Ryukyu Islands
Fig. 3. Ocular-side first gill arches of Pseudorhombus elevatus (A, B) and P. quinquocellatus (C, D). A, KAUM–I. 55641, 41.1 mm SL, Okinawa Island, Japan; B, KAUM–I. 55235, 135.7 mm SL, Okinawa Island, Japan; C, KAUM–I. 55592, 46.3 mm SL, Okinawa Island, Japan; D, ZMA.PISC.112569, syntype of P. quinquocellatus, 150.1 mm SL, Madura Strait, Indonesia. A and C, alizarin red stained.
Fig. 6 in First Japanese Records of the Flounders Pseudorhombus elevatus and P. quinquocellatus (Teleostei: Paralichthyidae) from Okinawa Island, Ryukyu Islands
Fig. 6. Specimens of Pseudorhombus quinquocellatus (A–D) and P. megalops (E, F) in preserved (A, C–F) and fresh (B) conditions. Magnification of ocular-side pelvic fin of P. megalops (F), showing single dark blotch on 4th ray (indicated by arrow). A, KAUM–I. 55592, 46.3 mm SL, Okinawa Island, Japan; B, KAUM–I. 113356, 121.7 mm SL, Pingtung, Taiwan; C, ZMA.PISC.112569, syntype of P. quinquocellatus, 150.1 mm SL, Madura Strait, Indonesia; D, ZMA.PISC.109328, syntype of P. quinquocellatus, 153.5 mm SL, Madura Strait, Indonesia; E, F, HUMZ 90027, 203.8 mm SL, Andaman Sea.
Fig. 5 in First Japanese Records of the Flounders Pseudorhombus elevatus and P. quinquocellatus (Teleostei: Paralichthyidae) from Okinawa Island, Ryukyu Islands
Fig. 5. Schematic drawings of Japanese species of Pseudorhombus, including P. elevatus (A), P.arsius (B), P. cinnamoneus (C), P. levisquamis (D), P. oligodon (E), P. quinquocellatus (F), P. oculocirris (G), P. pentophthalmus (H), and P. dupliciocellatus (I), showing obvious markings and dark skin flaps along gill opening on ocular side. Based on: A, KAUM–I. 105148, 110.5 mm SL; B, KAUM–I. 169146, 327.0 mm SL; C, KAUM–I. 88590, 232.8 mm SL; D, KAUM–I. 42865, 341.4 mm SL; E, KAUM–I. 160254, 238.4 mm SL; F, KAUM–I. 113356, 121.7 mm SL and ZMA.PISC.109328, 153.5 mm SL; G, KAUM–I. 115224, 173.6 mm SL; H, KAUM–I. 75596, 136.6 mm SL; I, KAUM–I. 109946, 295.6 mm SL.
Fig. 2 in First Japanese Records of the Flounders Pseudorhombus elevatus and P. quinquocellatus (Teleostei: Paralichthyidae) from Okinawa Island, Ryukyu Islands
Fig. 2. Ocular-side teeth of Pseudorhombus elevatus (A, B) and P. quinquocellatus (C) from Okinawa Island, Japan (B, C: schematic drawings). A, KAUM–I. 55230, 118.4 mm SL; B, KAUM–I. 55641, 41.1 mm SL; C, KAUM–I. 55592, 46.3 mm SL. Bars indicate 2 mm.
Fig. 7 in First Japanese Records of the Flounders Pseudorhombus elevatus and P. quinquocellatus (Teleostei: Paralichthyidae) from Okinawa Island, Ryukyu Islands
Fig. 7. Head of preserved specimen of Pseudorhombus quinquocellatus, showing skin flaps (arrows) along gill opening. KAUM–I. 55592, 46.3 mm SL, Okinawa Island, Japan.
Fig. 3 in First Japanese Record of Uropterygius fasciolatus (Muraenidae: Uropterygiinae) Collected from Yonaguni-jima Island, Ryukyu Archipelago
Fig. 3. Illustration of teeth on maxilla (left) and mandible (right) in Uropterygius fasciolatus (KAUM–I. 88910, 441.4 mm TL) collect- ed from Yonaguni-jima island, Japan.
Fig. 1 in First Japanese Record of Uropterygius fasciolatus (Muraenidae: Uropterygiinae) Collected from Yonaguni-jima Island, Ryukyu Archipelago
Fig. 1. Fresh specimen of Uropterygius fasciolatus (upper: KAUM–I. 88909, 304.0 mm TL; middle: KAUM–I. 88910, 441.4 mm TL) collect- ed from Yonaguni-jima island, Japan, and holotype (lower: BMNH 1877.2.24.84, 304.0 mm TL) collected from Atafu in the Tokelau Islands.
Fig. 2 in First Japanese Record of the Barred Perchlet Plectranthias fourmanoiri (Actinopterygii: Perciformes: Serranidae) from the Ryukyu Islands
Fig. 2. Dorsal (A) and lateral (B) views of head of Plectranthias fourmanoiri. KAUM–I. 70967, 31.6 mm SL; stained with cyanine blue.
Fig. 1 in First Japanese Record of the Barred Perchlet Plectranthias fourmanoiri (Actinopterygii: Perciformes: Serranidae) from the Ryukyu Islands
Fig. 1. Color photographs of Plectranthias fourmanoiri. KAUM–I. 70967, 31.6 mm SL, off Chabana, Yoron-jima island, Ryukyu Islands, Japan; A fresh, B after preservation.
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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.