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209 results for “North Pacific Ocean”
Data from: Genetic data reveal mixed-stock aggregations of gray whales in the North Pacific Ocean
Gray whales (Eschrichtius robustus) in the Western Pacific are critically endangered whereas in the Eastern Pacific they are relatively common. Holocene environmental changes and commercial whaling reduced their numbers, but gray whales in the Eastern Pacific now outnumber their Western counterparts by more than 100-fold. Herein, we investigate the genetic diversity and population structure within the species using a panel of genic SNPs. Results indicate the gray whale gene pool is differentiated into two substocks containing similar levels of genetic diversity, and that both our Eastern and Western geographic samples represent mixed-stock aggregations. Ongoing or future gene flow between the stocks may conserve genetic diversity overall but admixture has implications for conservation of the critically endangered Western gray whale.
Data from: Climatic forcing of Quaternary deep-sea benthic communities in the North Pacific Ocean
There is a growing evidence that changes in deep-sea benthic ecosystems are modulated by climate changes, but most evidence to date comes from the North Atlantic Ocean. Here we analyze new ostracod and published foraminiferal records for the last 250,000 years on Shatsky Rise in the North Pacific Ocean. Using linear models, we evaluate statistically the ability of environmental drivers (temperature, productivity, and seasonality of productivity) to predict changes in faunal diversity, abundance and composition. These microfossil data show glacial-interglacial shifts in overall abundances and species diversities that are low during glacial intervals and high during interglacials. These patterns replicate those previously documented in the North Atlantic Ocean, suggesting that the climatic forcing of the deep-sea ecosystem is widespread, and possibly global in nature. However, these results also reveal differences with prior studies that probably reflect the isolated nature of Shatsky Rise as a remote oceanic plateau. Ostracod assemblages on Shatsky Rise are highly endemic but of low diversity, consistent with the limited dispersal potential of these animals. Benthic foraminifera, by contrast, have much greater dispersal ability and their assemblages at Shatsky Rise show diversities typical for deep-sea faunas in other regions. Statistical analyses also reveal ostracod–foraminferal differences in relationships between environmental drivers and biotic change. Rarefied diversity is best explained as a hump-shaped function of surface productivity in ostracods, but as having a weak and positive relationship with temperature in foraminifera. Abundance shows a positive relationship with both productivity and seasonality of productivity in foraminifera, and a hump-shaped relationship in ostracods. Finally, species composition in ostracods is influenced by both temperature and productivity, but only a temperature effect is evident in foraminifera. Though complex in detail, the global-scale link between deep-sea ecosystems and Quaternary climate changes underscores the interaction between the physical and biological components of paleoceanographical research to better understand the history of the biosphere.
FIGURE 4 in New paedomorphic brachiopods from the abyssal zone of the north-eastern Pacific Ocean
FIGURE 4. Simpliciforma profunda Bitner & Zezina gen. et sp. nov., Clarion-Clipperton Zone, north-eastern Pacific; A, dorsal view of complete specimen, paratype, XI-52-24/2, Stn 27, depth 4850 m; B–D, dorsal valve, inner view and enlargement of the lophophore (C, D), paratype, XI-52-24/3, Stn 185–199, 4580 m; E, F, dorsal view of complete specimen, and enlargement of the umbonal part to show details of the beak, holotype, XI-52-24/1, Stn 217, 4680 m; G–I, dorsal view of complete specimen, and enlargement of the umbonal part, slightly tilted, to show details of the beak (H) and of the shell surface to show distinct growth lines (I), paratype, XI-52-24/4, Stn 185-199, 4580 m.
FIGURE 3 in New paedomorphic brachiopods from the abyssal zone of the north-eastern Pacific Ocean
FIGURE 3. Oceanithyris juveniformis Bitner & Zezina gen. et sp. nov., Clarion-Clipperton Zone, north-eastern Pacific; A, dorsal view of young complete specimen, XI-52-23/5, Stn 41, 4790 m; B–E, ventral, dorsal and lateral views of complete specimen, and enlargement of the umbonal part (E) to show details of the beak and the rough surface anterior to the protegular node and fine striae, holotype, XI-52-23/1, Stn 41, 4790 m; F–H, dorsal and posterior views of complete specimen, and enlargement of the umbonal part (H) to show details of the beak and the rough surface anterior to the protegular node, paratype, XI-52-23/2, Stn 217, 4680 m; I–L, dorsal valve, inner views with preserved lophophore and after its removal, and enlargements of posterior part (K, L) to show details of cardinalia, paratype, XI-52-23/3, Stn 217, 4680 m; M–O, ventral valve, inner view (M), and enlargement of posterior part (N) and tilted view (O) to show rudimentary deltidial plates, hooked teeth and step-like thickening of the shell, paratype, XI-52-23/4, Stn 27, depth 4850 m.
FIGURE 2 in New paedomorphic brachiopods from the abyssal zone of the north-eastern Pacific Ocean
FIGURE 2. Manganese nodules with attached brachiopods, Clarion-Clipperton Zone, Pacific; A, Pelagodiscus atlanticus (King, 1868), Stn 21, 4790 m; B, Oceanithyris juveniformis Bitner & Zezina gen. et sp. nov., Stn 197, 4580 m.
FIGURE 8 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
FIGURE 8. Spicule images of Docosaccus maculatus sp. n. (LM). A. Atrial pentactin. B. Choanosomal hexactin. C. Dermal hexactin. Scale bar (between Figures 8a and 8b): 200 µm. D–G. Oxyhexasters. Scale bar (between 8d and 8f): 50 µm.
FIGURE 9 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
FIGURE 9. Floricomes of Docosaccus maculatus sp. n. (SEM). A. Complete floricome. Scale bar: 50 µm. B. Close-up of floricome secondary rays. Scale bars: A, 50 µm; B, 10 µm.
FIGURE 7 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
FIGURE 7. Giant prostal hexactins crisscross through the thin body of the sponge, creating an unfused support structure for the plate-like sponge (A). Small distal rays project downward into sediments while reduced knobs project upward to the atrial surface of the sponge (B). Diactins bundle together with the distal ray to create anchoring spicule tufts (not shown). Scale bars: A, 100 µm; B, 1 cm.
FIGURE 5 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
FIGURE 5. Docosaccus maculatus sp. n., whole body images of holotype. A. In situ photograph taken by ROV Tiburon. Atrial surface with black and white spots visible. Black spots are caused by shadows in holes that perforate the body (parietal oscula); white spots occur where anchoring spicule tufts are visible through the body. Credit: MBARI. B. Dermal surface, fouled to a beige color from sediment during collection, showing small papillae consisting of anchoring spicule bundles. Scale bar: 5 cm.
FIGURE 6 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
FIGURE 6. Diagram of spicule arrangement for Docosaccus maculatus sp. n. from Station M, California, USA. The atrial surface is at the top of the image while the dermal surface is at the bottom. Scale bar: 200 µm.
FIGURE 3 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
FIGURE 3. Bathydorus laniger sp. n. from Station M, California, USA; scale diagram of spicule arrangement. The atrial surface is at the top of the image while the dermal surface is at the bottom; prostal diactins are omitted. Scale bar: 200 µm.
FIGURE 4 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
FIGURE 4. Bathydorus laniger sp. n., spicule images from SEM. A. Dermal stauractin. B. Hypoatrial hexactin. C. Hypodermal pentactin. D. Tip of choanosomal diactin. E. Oxyhexaster, oxyhemihexasters, and oxyhexactin. Scale bar: 200 µm.
FIGURE 2 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
FIGURE 2. Bathydorus laniger sp. n. holotype, whole body images. A. In situ photograph of whole organism taken by ROV Tiburon. Atrial surface with marginal prostalia visible. Credit: MBARI. B. Dermal surface fouled to a beige color from sediment during collection, with pleural prostalia (P) seen protruding as long, single diactins. Scale bar: 10 cm.
FIGURE 1 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
FIGURE 1. Collection location of two new species of glass sponges with a unique plate-like morphology: Station M (4,100 m depth, 34º50'N, 123º0'W), a long-term abyssal study site in the northeast Pacific.
FIGURE 8 in Snailfishes of the Careproctus rastrinus complex (Liparidae): redescriptions of seven species in the North Pacific Ocean region, with the description of a new species from the Beaufort Sea
FIGURE 8. Plots of principal component scores for (A) morphometric, (B) meristic, and (C) combined morphometric and meristic characters of eastern Pacific and Arctic species of the Careproctus rastrinus species complex lacking a postorbital pore: C. lerikimae n. sp. (♦), C. phasma (□), C. spectrum (▲).
FIGURE 7 in Snailfishes of the Careproctus rastrinus complex (Liparidae): redescriptions of seven species in the North Pacific Ocean region, with the description of a new species from the Beaufort Sea
FIGURE 7. Plots of principal component scores for (A) morphometric, (B) meristic, and (C) combined morphometric and meristic characters of western Pacific species of the Careproctus rastrinus species complex: C. rastrinus (□), C. trachysoma (), C. acanthodes (♦), and C. pellucidus (▲).
FIGURE 6 in Snailfishes of the Careproctus rastrinus complex (Liparidae): redescriptions of seven species in the North Pacific Ocean region, with the description of a new species from the Beaufort Sea
FIGURE 6. Distribution of species of the Careproctus rastrinus species complex: C. rastrinus (□), C. trachysoma (●), C. scottae (○), C. acanthodes (◊), C. pellucidus (▲), C. phasma (■), C. spectrum (∆),and C. lerikimae n. sp. (♦), based on material examined. Each symbol may represent more than one capture.
FIGURE 5 in Snailfishes of the Careproctus rastrinus complex (Liparidae): redescriptions of seven species in the North Pacific Ocean region, with the description of a new species from the Beaufort Sea
FIGURE 5. Pectoral girdles of species of the Careproctus rastrinus species complex: A) C. rastrinus, HUMZ 60772, 149.2 mm; B) C. trachysoma, FAKU 131179, 229.2 mm; C) C. scottae, UW 155110, 165 mm; D) C. acanthodes, FAKU 135569, 79.2 mm; E) C. pellucidus, FAKU 135317, 210.0 mm; F) C. phasma, UW 117934, 191 mm; G) C. lerikimae n. sp., paratype, UW 154841. Scale bar = 5 mm. c = coracoid, f = interradial fenestra, pr = proximal radial, dr = distal radial, s = scapula. Shaded areas represent cartilage.
FIGURE 4 in Snailfishes of the Careproctus rastrinus complex (Liparidae): redescriptions of seven species in the North Pacific Ocean region, with the description of a new species from the Beaufort Sea
FIGURE 4. Types of selected species of the Careproctus rastrinus species complex: A) C. phasma, SU 3028, paralectotype, 72.3 mm; B) C. spectrum, SU 48, lectotype, 91 mm.
FIGURE 2 in Snailfishes of the Careproctus rastrinus complex (Liparidae): redescriptions of seven species in the North Pacific Ocean region, with the description of a new species from the Beaufort Sea
FIGURE 2. Selected western Pacific species of the Careproctus rastrinus species complex: A) C. acanthodes, FAKU 130975, 93.1 mm; B) C. pellucidus, FAKU 134751, 138.2 mm.
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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.