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1,337 results for “antarctica”
FIGURE 16. Aphelochaeta palmeri n in Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R/V Anton Bruun, USNS Eltanin, USCG Glacier, R/V Hero, RVIB Nathaniel B. Palmer, and R/V Polarstern from the Southern Ocean, Antarctica, and off Western South America
FIGURE 16. Aphelochaeta palmeri n. sp. A, SEM, anterior end, right dorsolateral view; B–E, Photomicrographs: B, anterior end, dorsal view; C, anterior end, dorsal view; D, anterior end, ventral view; E, anterior end, dorsal view. A–B, D–E, NBP Station 1 (LACM-Poly 10205); C, NBP Station 18 (MCZ 149821). B–C stained with Shirlastain A; D–E, stained with Methyl Green.
FIGURE 15. Aphelochaeta palmeri n in Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R/V Anton Bruun, USNS Eltanin, USCG Glacier, R/V Hero, RVIB Nathaniel B. Palmer, and R/V Polarstern from the Southern Ocean, Antarctica, and off Western South America
FIGURE 15. Aphelochaeta palmeri n. sp. A, anterior end, dorsal view; B, anterior end, dorsal view of another specimen; C, posterior end, right lateral view. A, C (USNM 1013937); B (USNM 1013929).
FIGURE 10. Aphelochaeta dearborni n in Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R/V Anton Bruun, USNS Eltanin, USCG Glacier, R/V Hero, RVIB Nathaniel B. Palmer, and R/V Polarstern from the Southern Ocean, Antarctica, and off Western South America
FIGURE 10. Aphelochaeta dearborni n. sp. A, entire worm, lateral view (holotype USNM 1013879). B–G, (SMF 24882): B–C, SEMs of two complete specimens; D, detail of anterior end, dorsal view; E, anterior end, ventral view with pigment and Methyl Green stain; F, anterior end, ventrolateral view; G, entire ovigerous specimen left lateral view. A, F–G stained with Shirlastain A; E, stained with MG.
FIGURE 7. Aphelochaeta brandtae n in Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R/V Anton Bruun, USNS Eltanin, USCG Glacier, R/V Hero, RVIB Nathaniel B. Palmer, and R/V Polarstern from the Southern Ocean, Antarctica, and off Western South America
FIGURE 7. Aphelochaeta brandtae n. sp. A–C, paratype (SMF 24956): A, ventrolateral view of anterior and middle body segments; B, same, ventral view; C, anterior end, dorsal view. D–E, mid-body segments of holotype, (SMF 24954) with large eggs, stained with Shirlastain A. Arrows denote concentrations of Methyl Green stain.
FIGURE 2. Lanceola loveni antarctica Vinogradov, 1962 in Redescription of two rare, deep-sea species of hyperiidean amphipod, Lanceola loveni antarctica Vinogradov, 1962 and L. sphaerica Vinogradov, 1970 (Crustacea: Amphipoda: Hyperiidea: Lanceolidae)
FIGURE 2. Lanceola loveni antarctica Vinogradov, 1962: female 26 mm (USNM 1013495), western Drake Passage, 461–1263 m. Scale bars: 1.0 mm (G1 & G2); 2.0 mm (remainder). Enlargements all same magnification.
ICM data for Maitri, Antarctica
<p>ICM data for the Indian Antarctic station Maitri, for the event on 13 April 2017.</p>
FIGURES 66–78 in Orthoseira variabilis sp. nov., a new diatom from a snow patch in Potter Cove, King George Island, Antarctica
FIGURES 66–78. Orthoseira variabilis sp. nov. SEM. Specimens in internal valve view. Figs 66–72. Whole valve views. Note valves with shallow or inconspicuous caverns (arrows). Figs 73–78. Details of valve surface, showing areolar structure, carinoportulae, etched slits (Figs 73–74, arrows), and shallow caverns (Figs 76–78); note small unoccluded perforations among the areolae (arrowheads). Fig. 75 is a detail of Fig. 71, rotated. Fig. 76 is a detail of Fig. 72. Fig. 77 is a detail of Fig. 70. Fig. 78 is a detail of Fig. 66. Scale bar: 10 µm (Figs 66–72), 2 µm (Figs 73–78).
FIGURES 49–60 in Orthoseira variabilis sp. nov., a new diatom from a snow patch in Potter Cove, King George Island, Antarctica
FIGURES 49–60. Orthoseira variabilis sp. nov. SEM. Specimens in external view. Figs 49–54. Whole valve views; the arrow in Fig. 52 indicates a patch of smooth area. Figs 55–59. Details of valve surface, showing carinoportulae (Figs 55–56), areolar structure (Figs 56–58), a patch of smooth area (Fig. 58) and marginal spines (Fig. 59, white arrowheads). Fig. 60. Mantle view; note the conic spines at the margin (black arrowheads). Figs 55 and 57 are details of Fig. 53; Fig. 55, rotated. Fig. 56 is a detail of Fig. 54, rotated. Fig. 58 is a detail of Fig. 52, rotated. Fig. 59 is a detail of Fig. 50. Scale bar: 10 µm (Figs 49–54), 5 µm (Fig. 60), 2 µm (Figs 55–59).
FIGURES 15–48 in Orthoseira variabilis sp. nov., a new diatom from a snow patch in Potter Cove, King George Island, Antarctica
FIGURES 15–48. Orthoseira variabilis sp. nov. LM. Specimens in valve view. Figs 24–25: Holotype. Figs 46–48. Same specimen in three different focus levels; note the marginal spines. Figures marked with "=" are the same valves with a different focus. Scale bar: 10 µm (Scale bar is the same for Figs 15–45 and for Figs 46–48).
FIGURES 42–47 in Analysis of the type material of Navicula brachysira Brébisson with the description of Brachysira sandrae, a new raphid diatom (Bacillariophyceae) from Iles Kerguelen (TAAF, sub-Antarctica, southern Indian Ocean)
FIGURES 42–47. Brachysira sandrae. All pictures taken from the holotype population (sample B13). Fig. 42. External view of an entire valve showing the most typical features such as the marginal ridge, the striae composed of 2–4 areolae, the simple raphe endings and the mantle striae. Fig. 43. External view of an entire valve in oblique position showing clearly the marginal ridge and the ridge bordering the raphe. Fig. 44. Detail view of the central area. Not the presence of the papillae, the irregular length of the areolae and the simple proximal raphe endings. Fig. 45. External detail of a valve apex with the typical axial ridge terminating before the marginal ridge, the simple, almost straight distal raphe endings and the diminishing number of areolae per stria. Fig. 46. Internal view of an entire valve. Fig. 47. Internal detail of the central area with the typical weakly bent proximal raphe endings. Scale bar represents 10 µm, except for Figs 44 & 47 where scale bar = 5 µm.
FIGURE 4. Thouarella antarctica. SMF, R in <strong>A revision of the genus <em>Thouarella</em> Gray, 1870 (Octocorallia: Primnoidae), including an illustrated dichotomous key, a new species description, and comments on <em>Plumarella</em> Gray, 1870 and <em>Dasystenella</em>, Versluys, 1906</strong>
FIGURE 4. Thouarella antarctica. SMF, R/V W. Hertwig 1971, sta. 256: a) 21 cm colony; d) close up of branchlet. Holotype, MNHN, Oct.0000-208: b) holotype colony; c) abaxial polyp view; e) stereo opercular view of polyp, some marginals missing; f) opercular view of polyp with all marginals.
F in Description and ecology of a spongicolous lysianassoid amphipod (Crustacea) from Antarctica
F. 1. Pseudokoroga spongiophila n. sp. Holotype female, 5.4 mm. Scale bars: habitus: 1 mm, gnathopods: 100 mm.
FIGURE 9 in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 9. Vulcanolepas scotiaensis Peduncular scale arrangement. From peduncle of a mature "gracile" specimen, oriented with capitulum to top (capitulum length: 20 mm, peduncle length: 170mm). a: Arrangement immediately above the base of the peduncle; b: Arrangement mid-length along the peduncle, showing widely spaced scales and an attached juvenile; c:. Arrangement close to the capitulum, showing close proximity of small scales, (lower part of capitulum visible). Specimen from JC42-F-0396.
Fig. 2 in Differential expression after UV-B radiation and characterization of chalcone synthase from the Patagonian hairgrass Deschampsia antarctica
Fig. 2. Phylogenetic analysis of full-length predicted DaCHS protein compared with CHS proteins from: H. vulgare HvCHS1 (ID: P26018.1), H. vulgare HvCHS2 (ID: Q96562.1), O. sativa subsp. japonica OsjCHS1 (ID: XP_015618054.1), O. sativa subsp. japonica OsjCHS2(ID: XP_015646206.1), O. sativa subsp. indica OsiCHS1 (ID: A2ZEX7.1), S. bicolor SbCHS1(ID: XP_002450874.1), S. bicolor SbCHS2(ID: XP_002450871.1), S. bicolor SbCHS3 (ID: XP_002450875.1), S. bicolor SbCHS4(ID: XP_002450870.1), S. bicolor SbCHS5(ID: XP_002449616.1), S. bicolor SbCHS6 (ID: XP_002450877.1), S. bicolor SbCHS7(ID: XP_002450876.1), Z. mays ZmCHS1 (ID: P24824.1), Z. mays ZmCHS2 (ID: NP_001142246.1). Acetate kinase was used as the outlier (ID: WP_012677240.1). Numbers at each fork in the tree indicate the times that gene groups were clustered together in the 5000 bootstrap replicates.
Fig. 6 in Differential expression after UV-B radiation and characterization of chalcone synthase from the Patagonian hairgrass Deschampsia antarctica
Fig. 6. Effect of UV-B radiation on DaCHS gene. Control plants were maintained in a growth chamber with a PAR regime (16/8 h). Treated plants underwent the same PAR regime daily, supplemented with UV-B radiation for 9 h. Measurements were made at 3.5 and 7 days. One-way ANOVA from Statistica 4.0 software was used for statistical analysis. Bars indicate standard deviation and letters indicate statistical difference (p ≤ 0.05).
Station locations for the 20km x 10km Palmer Station Antarctica LTER sampling grid.
The Palmer LTER established from the program onset both a regional grid (900km x 200km West of the Antarctic peninsula) as well as a Palmer basin grid (within 2 mile limit of station) as organizing elements of the annual sampling strategy. Grid locations West of the Antarctic Peninsula may be calculated from latitude-longitude coordinates in order to establish a location within the LTER regional grid reference frame.
Station locations for the full Palmer Station Antarctica LTER sampling grid including the 20km x 10km grid, 5km x 5km grid, inshore stations, Palmer basin stations, high density grid, picket line 10km, picket line 3km and picket line multi.
The Palmer LTER established from the program onset both a regional grid (900km x 200km West of the Antarctic peninsula) as well as a Palmer basin grid (within 2 mile limit of station) as organizing elements of the annual sampling strategy. Grid locations West of the Antarctic Peninsula may be calculated from latitude-longitude coordinates in order to establish a location within the LTER regional grid reference frame.
Measurements off James Ross Island, Antarctica
Measurements made off James Ross Island near Antarctica in 2005.
MEaSUREs InSAR-Based Ice Velocity Maps of Central Antarctica: 1997 and 2009 V001
This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, consists of two high-resolution digital mosaics of ice motion in Central Antarctica. The mosaics were assembled from satellite interferometric synthetic-aperture radar (InSAR) data acquired by RADARSAT-1 in 1997 and by RADARSAT-2 in 2009. See <a href="https://nsidc.org/data/measures/aiv">Antarctic Ice Sheet Velocity and Mapping Data</a> for related data.
MEaSUREs InSAR-Based Antarctica Ice Velocity Map V002
This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides the first comprehensive, high-resolution, digital mosaics of ice motion in Antarctica assembled from multiple satellite interferometric, synthetic-aperture radar systems. Data were largely acquired during the International Polar Years 2007 to 2009, as well as between 2013 and 2016. Additional data acquired between 1996 and 2016 were used as needed to maximize coverage. See <a href="https://nsidc.org/data/measures/aiv">Antarctic Ice Sheet Velocity and Mapping Data</a> for related data.
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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.