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3,421 results for “Amazon”
Fig. 4 in A new highly apomorphic species of Bujurquina (Teleostei: Cichlidae) from a reverse flowing river in the Peruvian Amazon, with a key to the species in the genus
Fig. 4. Representative live specimens of the valid species of Bujurquina Kullander, 1986 in the Northern group including the newly described species B. omagua sp. nov.
Fig. 3 in A new highly apomorphic species of Bujurquina (Teleostei: Cichlidae) from a reverse flowing river in the Peruvian Amazon, with a key to the species in the genus
Fig. 3. Detailed photographs of the spinous portion of the dorsal fin of species of Bujurquina Kullander, 1986 in the Southern group (see Figs 1–2). Note lack of patterning as opposed to various types of ornamentation in species of the Northern group. Note differences in the coloration of the dorsal fin lappets between some of the species, e.g., red-orange, vs white vs black.
Figures 1–4 in Presence of Euglossa (Euglossa) amazonica outside of the Amazon Basin - biogeographic insights
Figures 1–4. Male specimen of Euglossa (Euglossa) amazonica Dressler from Serrania de Pirre, Cana Biological Station, Darién, Panama. 1. Dorsal habitus. 2. Lateral habitus. 3. Facial aspect. 4. Outer surface of mesotibia.
Cultural atlas of vocal variation in the yellow-naped amazon parrot
<p class="MsoNormal">Vocal dialects are a taxonomically widespread phenomenon, which are usually studied in a restricted portion of a species' range. It is unclear whether geographic patterns observed in one part of a species' range can be inferred as typical across the range or whether local conditions influence the presence or absence of dialects. We examined the yellow-naped amazon, <em>Amazona auropalliata</em>, a parrot species with remarkable vocal learning capabilities. Although this species is native to Mesoamerica, only Costa Rican populations have been evaluated long-term. Previous studies have shown that these populations exhibit geographically and temporally stable vocal dialect patterns. Without data on populations outside of Costa Rica, it is impossible to know if vocal dialects are present in northern range populations, and whether or not they exhibit similar geographic structure to southern range populations. We recorded yellow-naped amazon contact calls at 47 different sites across the range between 2016 and 2019 and evaluated them for the presence of dialects. We visually classified 14 contact call types based on spectrographic similarity and used spectrographic cross-correlation, principal component analysis, and Mantel-based spatial autocorrelations to assess acoustic similarity. The results from our study show that the vocal patterns previously seen in Costa Rica are also present in northern range populations, supporting our hypothesis. Call types were regionally specific (e.g., vocal dialects) across the range, and no call types were repeated across multiple regions. We did, however, observe distinctive structural characteristics that are found in multiple call types, suggesting that different call types stem from a common origin. Vocal dialect in this species is likely maintained through a tendency toward philopatry and matching call types to enhance social identification.</p>
Montly flux of TPM, CO2, CO and CH4 for the south of the Amazon Basin during 2020, 2021 and 2022.
<p>Base de dados da emissão média mensal do fluxo dos materiais TPM, CO2, CO e CH4 para o sul da Bacia Amazônica durante os anos 2020,2021 e 2022. Gerada a partir dos dados do instrumento ABI a bordo do satélite GOES-East, dos coeficientes de emissão do inventário FEER e fatores de emissão específicos do bioma de floresta tropical.</p> <p> </p> <p>Database of the monthly average emission flux of the materials TPM, CO2, CO, and CH4 for the southern Amazon Basin during the years 2020, 2021, and 2022. Generated from data obtained by the ABI instrument on board the GOES-East satellite, using emission coefficients from the FEER inventory and biome-specific emission factors for tropical forests.</p> <p> </p> <p> </p>
Figure 4 in Morphological and Molecular Characteristics of Kudoa viseuensis n. sp. (Myxosporea: Multivalvulida), Found in the Muscle of Batrachoides surinamensis (Teleostei: Batrachoididae) in the Brazilian Amazon Region
Figure 4. Phylogenetic tree derived from Bayesian Inference (BI), based on the partial sequences of the SSU rDNA gene of Kudoa vi- seuensis n. sp. and closely-related myxosporans. The GenBank access numbers are shown next to the species names, and the numbers at each node are the BI posterior probabilities. The new species is highlighted in bold type. Abbreviations: Msl – muscle; Dtr – digestive tract; Nsy – nervous system.
Figure 2 in Morphological and Molecular Characteristics of Kudoa viseuensis n. sp. (Myxosporea: Multivalvulida), Found in the Muscle of Batrachoides surinamensis (Teleostei: Batrachoididae) in the Brazilian Amazon Region
Figure 2. Light photomicrograph: (A) longitudinal histology section of the skeletal musculature of B. surinamensis containing a pseudocyst (*), along the axis of the muscle, showing the substitution of the fiber by the parasite; (B) transversal section showing the pseudocyst of the mixosporean occupying the central portion of the muscle fiber (arrowhead), typical of an individual infection; (C) Multiple infection of pseudocysts within a single muscle fiber, separated from one another and the muscle tissue by a fine conjunctive membrane (arrows). Scale bars: 40 µm.
Figure 1 in Morphological and Molecular Characteristics of Kudoa viseuensis n. sp. (Myxosporea: Multivalvulida), Found in the Muscle of Batrachoides surinamensis (Teleostei: Batrachoididae) in the Brazilian Amazon Region
Figure 1. Light photomicrograph: (A) Whitish pseudocyst (arrowhead) found in the musculature of B. surinamensis. Scale bar: 1000 µm; (B) pseudocyst (c) and numerous mature spores (e) observed following the rupture of the pseudocyst. Scale bar: 100 µm; (C) Fresh, pseu- do-square spores (e) of Kudoa viseuensis n. sp. Scale bar: 20 µm; Inset: polar capsules (PC) in lateral (L) and apical (A) views (DIC). Scale bar: 10 µm.
Ultrastructure description of the spermatozoa of the Amazon bonytongue Arapaima gigas (Schinz, 1822)
<p>Dataset containing micrographs obtained through scanning and transmission electron microscopy (SEM and TEM) depicting the ultrastructure of the spermatozoa of <em>Arapaima gigas</em> (Schinz, 1822)</p>
Data and model code for: Habitat use patterns suggest that climate-driven vegetation changes will negatively impact mammal communities in the Amazon (ACV)
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Phylogenetic conservatism in the relationship between functional and demographic characteristics in Amazon tree taxa
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Is Poaceae pollen size a useful proxy in palaeoecological studies? New insights from a Poaceae pollen morphological study in the Amazon
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Cultural atlas of vocal variation in the yellow-naped amazon parrot
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Admixture may be extensive among hyperdominant Amazon rainforest tree species
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Data from: Widespread cultural change in declining populations of Amazon parrots
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Cold waves in the Amazon rainforest and their ecological impact
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Wayqecha Amazon cloud curtain ecosystem experiment: Climate data and R processing code
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Secondary Amazon rainforest partially recovers tree cavities suitable for nesting birds in 18–34 years
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Water and soil chemistry and molecular composition data of dissolved organic matter from soils in the central Amazon rainforest, 2019-2021
This dataset was created based on sampling campaigns in the central Amazon rainforest. It covers four field sites in vicinity of the Amazon Tall Tower Oberservatory project (ATTO). The field sites are comprised of pristine, old-growth rainforest with distinct forest types: terra firme forest (Plateau and Terrace sites) and white-sand forest (Campina and Campinarana sites). Freely percolating soil porewater was sampled repeatedly in soil profiles from 0 to 30 cm in the wet seasons (October to May) of 2019, 2020 and 2021. Solid soil samples were taken in vicinity to the plots in October 2017. The datasets include chemical and texture (particle size fractions) and chemical (metals, cation exchange capacities and pH) data from soil samples. Soil porewater samples were measured for pH, electrical conductivity and dissolved organic carbon (DOC) concentrations. There are some missing values for these data, particularly for DOC concentrations. Soil porewater samples were used for solid-phase extraction of dissolved organic matter (DOM). The molecular composition was measured by ultra-high resolution mass spectrometry (Orbitrap Elite MS). The detected masses were used to assign molecular formulas. The data include the assigned molecular formulas and sum-normalized intensites of all samples. This data is associated with a Ph.D. dissertation chapter (Lange, 2025) and a journal article (Lange et al., accepted).
Dataset for the manuscript "Barium stable isotopes as a fingerprint of biological cycling in the Amazon River Basin" submitted to Biogeosciences Discussions
<p>This file contains the dataset of the manuscript submitted to Biogeosciences Discussions entitled "Barium stable isotopes as a fingerprint of biological cycling in the Amazon River Basin" by Charbonnier et al. It consists in three spreadsheets: (1) dissolved species concentration and dissolved Ba isotope data on river dissolved load; (2) main characteristics and Ba isotope data of river sediments; (3) compilation of major element and Ba and Li concentration in rocks (compilation made from the GEOROC database) and in the dissolved load of river draining single rock types (compilation made from previously published data and new data).</p>
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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.