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844 results for “South Atlantic”
FIG. 3 in Deep-Sea Anemones (Cnidaria: Anthozoa: Actiniaria) From The South Atlantic
FIG. 3. Cnidom of Actinernus mercedae: A, E, H, L, spirocyst; B, C, G, K, O, P, p-mastigophore A; D, holotrich; F, J, M, basitrich; I, N, b-mastigophore.
Dietary and niche analyses of four endemic and sympatric batoid species of the subtropical South Atlantic Ocean
<p><span>We aimed to characterize the trophic ecology and test the hypothesis of niche overlap between four endemic and sympatric batoid species of the subtropical South Atlantic. Data were collected between 2017 and 2022 from two artisanal fishery communities in southern Brazil. Batoid stomach contents were identified, separated into categories, and weighed. We calculated the Levins, Pianka's, and relative dietary importance index (IRI), and performed a similarity test using PERMANOVA and the similarity percentage (SIMPER) for niche analysis. We analyzed 229 stomachs of four batoid species, 187 containing food. All species showed a narrow food niche. The most important diet items for each species were: <em>Leptochaela</em> <em>serratorbita</em> and Onuphidae for <em>Dasyatis</em> <em>hypostigma</em>; Nematoda for <em>Pseudobatos</em> <em>horkelii</em>; <em>L</em>. <em>serratorbita</em> and <em>Sicyonia</em> <em>dorsalis</em> for <em>Rioraja</em> <em>agassizii</em>; and <em>Achelous</em> <em>spinicarpus</em> for <em>Sympterygia</em> <em>bonapartii</em>. The analyses showed (statistically significant) dissimilarity among the species' diets without significant niche overlap. This study provides ecology-feeding information for four batoid species with specialized diets composed of benthic prey species. Our results detected the absence of significant niche overlap among batoid species, suggesting other types of niche partitioning and spatiotemporal habitat variation. This information could be considered for local management plans.</span></p>
Dataset: Surface waters in socially vulnerable areas are disproportionately under-monitored for nutrients in the U.S. South Atlantic-Gulf Region
Open the record for dataset details and reuse information.
Dietary and niche analyses of four endemic and sympatric batoid species of the subtropical South Atlantic Ocean
Open the record for dataset details and reuse information.
FIGURE 2 in First record of the family Coralliidae (Cnidaria: Anthozoa: Octocorallia) from the western South Atlantic, with a description of Corallium medea Bayer, 1964
FIGURE 2. Corallium medea (MNRJ 4265): axis under SEM. Scale bar = 0.5 mm.
The Heat and Carbon Characteristics of Modelled Mesoscale Eddies in the South Atlantic Ocean
<p>Datasets in this repository are generated from BIOPERIANT12-CNCLNG01 model and are part of the manuscript entitled: "The Heat and Carbon Characteristics of Modelled Mesoscale Eddies in the South Atlantic Ocean". </p>
Figure 9 in Ten thousand kilometres away and still the same species? The mystery of identity of Scopelocheirus sp. (Amphipoda: Scopelocheiridae) from the South Atlantic
Figure 9. Scopelocheirus sossi sp. nov., holotype, male, 6.6 mm, Namibia, Stn. M157_41.
Figure 8 in Ten thousand kilometres away and still the same species? The mystery of identity of Scopelocheirus sp. (Amphipoda: Scopelocheiridae) from the South Atlantic
Figure 8. Scopelocheirus sossi sp. nov., holotype, male, 6.6 mm, Namibia, habitus, Stn. M157_41.
Figure 1 in Ten thousand kilometres away and still the same species? The mystery of identity of Scopelocheirus sp. (Amphipoda: Scopelocheiridae) from the South Atlantic
Figure 1. Sampling points are indicated by red dots.
Figure 2. Hentzia antillana Bryant, 1940 in A Caribbean in the South Atlantic: first records of Hentzia antillana Bryant 1940, with notes on other previously reported jumping spider species (Araneae: Salticidae), from Ascension Island
Figure 2. Hentzia antillana Bryant, 1940 adult male (A–B) and female (C–D) from Ascension Island. A, Right male palp, ventral view. B, Same, retrolateral view. C, Epigyne, ventral view. D, Epigyne, dorsal view.
Figure 1. Hentzia antillana Bryant, 1940 in A Caribbean in the South Atlantic: first records of Hentzia antillana Bryant 1940, with notes on other previously reported jumping spider species (Araneae: Salticidae), from Ascension Island
Figure 1. Hentzia antillana Bryant, 1940 adult male (A–C) and female (D–F) from Ascension Island. A, Male, habitus, dorsal. B, Same, ventral. C, Male, frontal view of eyes and chelicerae. D, Female habitus, dorsal. E, Same, ventral. F, Female, frontal view of eyes and chelicerae.
Figure 1. P in Description of Pseudoameiropsis suphankaraytugi sp. nov. (Copepoda: Harpacticoida: Ameiridae) with the first report of the genus Pseudoameiropsis Pallares, 1982 outside of the South Atlantic Ocean
Figure 1. P. suphankaraytugi sp. nov., holotype, ♀, habitus: a) dorsal, b) lateral, c) rostrum.
Fig. 3 in First Record of the Rare Deepwater Assfish Bassozetus mozambiquensis (Ophidiiformes: Ophidiidae) from the Western South Atlantic
Fig. 3. Left second gill arch of Bassozetus mozambiquensis. ZMH 26332, 478 mm SL.
Changing diets over time: knock-on effects of marine megafauna overexploitation on their competitors in the South-Western Atlantic Ocean
This study compares the δ<sup>15</sup>N values and the trophic position of two seabird species throughout the Late Holocene in three regions in the South-Western Atlantic Ocean to assess the hypothesis that the decimation of megafauna lead to changes in the trophic position of mesopredators. Modern and ancient mollusc shells were also analysed to account for changes in the isotopic baseline through time. Results revealed that modern Magellanic penguins have higher δ<sup>15</sup>N values than their ancient conspecifics in the three regions, after controlling for changes in the isotopic baseline. This was also true for modern Imperial shags compared to ancient unidentified cormorants/shags from the two areas where ancient specimens were recovered (Southern Patagonia and the Beagle Channel). Such temporal variability might be caused by three non-mutually exclusive processes: decreased availability of pelagic squat lobster resulting from decreasing primary productivity through the Late Holocene, increased availability of small fishes resulting from the sequential depletion of other piscivores (South American fur seal and sea lion and Argentine hake) since the late 18<sup>th</sup> century and modification of the migratory patterns of Magellanic penguins. Although disentangling the relative contribution of all those processes is impossible at this time, the results reported here demonstrate that the ecology of Magellanic penguins and Imperial shags has undergone major changes since the Late Holocene.
FOCI model output used in the study by Ivanciu et al. - On the ridging of the South Atlantic Anticyclone over South Africa: the impact of Rossby wave breaking and of climate change
<p>This dataset contains the model output used in the analysis presented in the study by Ivanciu et al., 2022 - On the ridging of the South Atlantic Anticyclone over South Africa: the impact of Rossby wave breaking and of climate change. Four ensembles of three simulations each were performed with the global coupled climate model FOCI (Flexible Ocean and Climate Infrastructure, Matthes et al., 2020). Details about the ensembles can be found in the above-mentioned publication. The files containing "past" in their name belong to the ensemble "PAST", the files containing "future" in their name belong to the ensemble "FUTURE", the files containing "future_GHG" in their name belong to the ensemble "GHG" and the files containing "future_Ozone" in their name belong to the ensemble "OZONE" from the publication.</p>
Fig. 1 in Invasion of the Indo-Pacific blenny Omobranchus punctatus (Perciformes: Blenniidae) on the Atlantic Coast of Central and South America
Fig. 1. Omobranchus punctatus in natural habitat (tide pools) in Brazil. Photos by J. Nunes.
Large simulated radiative effects of smoke in the south-east Atlantic: supporting data
<p>Datasets required to reproduce key figures from journal article acp-2018-305. Contact corresponding author for further information.</p> <p>In the filenames, 'BB' indicates simulation results with biomass burning aerosol, 'noBB' without, and 'noAA' are simulations without absorbing effects of aerosol. The 300x300 regional domain is a rotated pole centred on 10S, 12W.</p>
Raw multibeam bathymetry data collected around Bouvetoya in the South Atlantic Ocean on board the R/V Akademik Tryoshnikov during the austral summer of 2016/2017 as part of the Antarctic Circumnavigation Expedition (ACE).
<p><strong>Dataset abstract</strong></p> <p>An ELAC Nautik 3020 multibeam echo sounder with a 20 kHz transducer mounted on the hull of the R/V Akademik Tryoshnikov, was used to collect multibeam bathymetry data during the Antarctic Circumnavigation Expedition (ACE). This particular dataset was collected around Bouvetoya in the South Atlantic Ocean in the austral summer of 2016/2017.</p> <p>Bathymetry data were used live during the cruise to look for suitable locations where benthic trawling and remotely-operated vehicle deployments could take place, rather than to undertake specific bathymetric surveys.</p> <p>This raw dataset is provided without calibration information for the surface sound velocity or instrumentation itself and should be used with due caution.</p> <p><strong>Dataset contents</strong></p> <ul> <li>lineYYYYDDmonHHMMSS.xse, data file, proprietary format</li> <li>location.hydrostar, ancillary file, ASCII</li> <li>data_file_header.txt, metadata, text</li> <li>README.txt, metadata, text</li> </ul> <p><strong>Dataset license</strong></p> <p>This raw multibeam bathymetry dataset is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full text can be found at https://creativecommons.org/licenses/by/4.0/</p>
Figure 3 in Orb-web spiders (Araneae: Araneomorphae; Orbiculariae) captured by hunting-wasps (Hymenoptera: Sphecidae) in an area of Atlantic Forest in south-eastern Brazil
Figure 3. Relative abundance of the three most common spider genera in Trypoxylon albonigrum nests.
"Microfossil evidence for trophic changes during the Eocene–Oligocene transition in the South Atlantic (ODP Site 1263, Walvis Ridge)" - calcareous nannofossil census data
<p>This is a data supplement (<strong>Dataset A</strong>) to the paper "Microfossil evidence for trophic changes during the Eocene–Oligocene transition in the South Atlantic (ODP Site 1263, Walvis Ridge)" by Bordiga et al., 2015a (https://doi:10.5194/cp-11-1249-2015). Note that data are tabulated against depth in core (meters composite depth, mcd). Please refer to <strong>Table 1</strong> in Bordiga et al. (2015) for age-depth model.</p> <p><strong>Dataset A</strong>. Calcareous nannofossil census data (ODP Site 1263)</p> <p>One file (ODP 1263 dataset A_Bordiga et al. 2015.xls) containing:<br> Sample information; Raw counts, relative (%) and absolute abundances (N/ g) of all species and size-based groups detected (as illustrated in Figure S2 of the original publication).</p>
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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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.