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1,235 results for “Brazilian Amazon”
FIGURE 18 in Description of a new Neotropical spider genus in the family Ctenidae Keyserling 1877 (Araneae: Lycosoidea) from the Brazilian Amazon rainforest
FIGURE 18. Bulbous setae in the metatarsal III of males, ventral. A, Bulboctenus kayapo sp. nov. (MPEG(ARA)018548); B, Ctenus similis.
FIGURE 17 in Description of a new Neotropical spider genus in the family Ctenidae Keyserling 1877 (Araneae: Lycosoidea) from the Brazilian Amazon rainforest
FIGURE 17. Bulboctenus munduruku sp. nov., genitalia. A–C (MPEG(ARA)002411), male palp; A, ventral; B, retrolateral; C, prolateral. D–E (MPEG(ARA)002411), female epigyne; D, ventral (arrow indicating opening of the copulatory duct); E, dorsal. Abbreviations: CD, copulatory duct; E, embolus; FD, fertilization duct; LP, lateral projection; MA, median apophysis; MS, median sector; PLP, posterior lateral projection; RTA, retrolateral tibial apophysis; S, spermathecae.
Genetic structure in populations of Euterpe precatoria Mart. in the Brazilian Amazon
<p><i>Euterpe precatoria</i> is a palm tree belonging to the Arecaceae family, occurring in Western and Central Brazilian Amazonia Its fruit, which is very appreciated in the Amazon region, produces pulp that is consumed in fresh form. Its production is carried out almost exclusively by extractive farmers. In order to establish adequate strategies to sustain this genetic resource. We need knowledge about its diversity and genetic structure in natural populations. This study aimed to evaluate the influence of geographic distance on genetic structure in the main extractive populations of <i>E. precatoria</i> in the Brazilian Amazon. Leaves from 377 plants were collected in 19 populations located in 16 municipalities in the State of Amazonas and three in the State of Rondônia. Twelve microsatellite loci were used to genotype the plants. The diversity and genetic structure among populations were estimated. The average number of alleles per locus was 5.97. The observed heterozygosity means (<i>H<sub>O</sub></i>) were higher than expected (<i>H<sub>E</sub></i>) at the population level (<i>H<sub>O</sub></i> = 0.72, <i>H<sub>E</sub></i> = 0.66) and fixation index (<i>f</i> = -0.100) was negative. The<i> F<sub>ST</sub></i><sub> </sub>value (0.1820) and the AMOVA results (17.961) showed population structure. The populations were clustered into three groups (K = 3) in Bayesian analysis. The Discriminant Analysis of Principal Components (DAPC) confirmed eight clusters, with the populations close to those identified by the Bayesian analysis. The geographic differentiation was confirmed by the groupings obtained in the analyses by the Structure program and the DACP function. Information related to phenotypic, genetic and environmental characterization of populations is important to guide conservation and management strategies and the formulation of public species management policies in Amazonian.</p>
Data from: Phylogeography of the dark fruit-eating bat Artibeus obscurus in the Brazilian Amazon
Artibeus obscurus (Mammalia: Chiroptera) is endemic to South America, being found in at least 18 Brazilian states. Recent studies revealed that different populations of this genus present distinct phylogeographic patterns; however, very little is known on the population genetics structure of A. obscurus in the Amazon rainforest. Here, using a fragment (1010bp) of the mitochondrial gene cytochrome b from 87 samples, we investigated patterns of genetic divergence among populations of A. obscurus from different locations in the Brazilian Amazon rainforest and compared them with other Brazilian and South American regions. Analysis of molecular variance (AMOVA), fixation index (Fst) analysis, and phylogeographic patterns showed divergence between two major monophyletic groups, each one corresponding to a geographic region associated with the Atlantic and Amazon forest biomes. The Atlantic forest clusters formed a monophyletic group with a high bootstrap support and a fragmented distribution that follows the pattern predicted by the Refuge Theory. On the other hand, a different scenario was observed for the Amazon forest, where no fragmentation was identified. The AMOVA results revealed a significant geographic heterogeneity in the distribution of genetic variation, with 70% found within populations across the studied populations (Fst values ranging from 0.05864 to 0.09673; φST = 0.55). The intrapopulational analysis revealed that one population (Bragança) showed significant evidence of population expansion, with the formation of 2 distinct phylogroups, suggesting the occurrence of a subspecies or at least a different population in this region. These results also suggest considerable heterogeneity for A. obscurus in the Amazon region.
Data from: A social-ecological database to advance research on infrastructure development impacts in the Brazilian Amazon
Recognized as one of the world's most vital natural and cultural resources, the Amazon faces a wide variety of threats from natural resource and infrastructure development. Within this context, rigorous scientific study of the region's complex social-ecological system is critical to inform and direct decision-making toward more sustainable environmental and social outcomes. Given the Amazon's tightly linked social and ecological components and the scope of potential development impacts, effective study of this system requires an easily accessible resource that provides a broad and reliable data baseline. This paper brings together multiple datasets from diverse disciplines (including human health, socio-economics, environment, hydrology, and energy) to provide investigators with a variety of baseline data to explore the multiple long-term effects of infrastructure development in the Brazilian Amazon.
Figure 4 in Two new species of Passalus Fabricius (Coleoptera: Passalidae) from the western Brazilian Amazon with comments on the taxonomic limits of the subgenera
Figure 4. Passalus (Passalus) cleidecostae sp. nov., habitus. (A) dorsal; (B) ventral; (C) lateral.
Figure 1 in Two new species of Passalus Fabricius (Coleoptera: Passalidae) from the western Brazilian Amazon with comments on the taxonomic limits of the subgenera
Figure 1. Passalus (Pertinax) deuterocerus sp. nov., habitus. (A) dorsal; (B) ventral; (C) lateral.
Data from: Habitat use of the ocelot (Leopardus pardalis) in Brazilian Amazon
Amazonia forest plays a major role in providing ecosystem services for human and sanctuaries for wildlife. However, ongoing deforestation and habitat fragmentation in the Brazilian Amazon has threatened both. The ocelot is an ecologically important mesopredator and a potential conservation ambassador species, yet there are no previous studies on its habitat preference and spatial patterns in this biome. From 2010 to 2017, twelve sites were surveyed, totaling 899 camera trap stations, the largest known dataset for this species. Using occupancy modeling incorporating spatial autocorrelation, we assessed habitat use for ocelot populations across the Brazilian Amazon. Our results revealed a positive sigmoidal correlation between remote‐sensing derived metrics of forest cover, disjunct core area density, elevation, distance to roads, distance to settlements and habitat use, and that habitat use by ocelots was negatively associated with slope and distance to river/lake. These findings shed light on the regional scale habitat use of ocelots and indicate important species–habitat relationships, thus providing valuable information for conservation management and land‐use planning.
Data from: Human management and hybridization shape treegourd fruits in the Brazilian Amazon Basin
Local people's perceptions of cultivated and wild agrobiodiversity, as well as their management of hybridization are still understudied in Amazonia. Here we analyze domesticated treegourd (Crescentia cujete), whose versatile fruits have technological, symbolic and medicinal uses. A wild relative (C. amazonica) of the cultivated species grows spontaneously in Amazonian flooded forests. We demonstrated, using whole chloroplast sequences and nuclear microsatellites, that the two species are strongly differentiated. Nonetheless, they hybridize readily throughout Amazonia and the proportions of admixture correlate with fruit size variation of cultivated trees. New morphotypes arise from hybridization, and are recognized by people and named as local varieties. Small hybrid fruits are used to make the important symbolic rattle (maracá), suggesting that management of hybrid trees is an ancient human practice in Amazonia. Effective conservation of Amazonian agrobiodiversity needs to incorporate this interaction between wild and cultivated populations that is managed by smallholder families. Beyond treegourd, our study clearly shows that hybridization plays an important role in tree crop phenotypic diversification, and that the integration of molecular analyses and farmers'perceptions of diversity help disentangle crop domestication history.
FIGURE 8–13. 8–10 in New species and notes on Apenesia (Hymenoptera, Bethylidae) from the Brazilian Amazon
FIGURE 8–13. 8–10 Apenesia singularis sp. nov. 8, head and mesosoma, dorsal view; 9, mandible, frontal view; 10, genitalia, ventral view; 11–13 Apenesia strigulata sp. nov. 11, head and mesosoma, dorsal view; 12, mandible, frontal view; 13, genitalia, ventral view; (Scale bars = 1 mm).
FIGURE 14–19. 14–16 in New species and notes on Apenesia (Hymenoptera, Bethylidae) from the Brazilian Amazon
FIGURE 14–19. 14–16, Apenesia lapsa sp. nov. 14, head and mesosoma, dorsal view; 15 mandible, frontal view; 16, genitalia, ventral view 17–19, Apenesia acia sp. nov. 17, head and mesosoma, dorsal view; 18 mandible, frontal view; 19, genitalia, ventral view (Scale bars = 1 mm).
FIGURE 1–7. 1–4 in New species and notes on Apenesia (Hymenoptera, Bethylidae) from the Brazilian Amazon
FIGURE 1–7. 1–4 Apenesia membranaceus sp. nov. 1, head and mesosoma, dorsal view; 2–3, mandible, frontal view, 2 holotype; 3, paratype; 4, genitalia, ventral view; 5–7, Apenesia auricula sp. nov. 5, head and mesosoma, dorsal view; 6 mandible, frontal view; 7, genitalia, ventral view (Scale bars = 1 mm).
FIGURE 20–23. 20–23 in New species and notes on Apenesia (Hymenoptera, Bethylidae) from the Brazilian Amazon
FIGURE 20–23. 20–23 Apenesia curvata sp. nov. 20, head and mesosoma, dorsal view; 21, mandible, frontal view; 22, genitalia, ventral view, 23, aedeagus, lateral view (Scale bars = 1 mm).
FIGURE 5 in Rivulus uatuman sp. n. (Teleostei: Cyprinodontiformes: Rivul idae): a new miniature killifish from the central Brazilian Amazon
FIGURE 5. Diagrammatic representation of the frontal squamation pattern and supraorbital neuromast arrangement in: A, Rivulus romeri, R. kirovskyi and R. uatuman (sketch based on R. kirovskyi, holotype, UFRJ 5935, male, 20.3 mm SL); and B, in other species of the genus (sketch based on R. santensis, UFRJ 123, male, 38.5 mm SL).
FIGURES 2–6 in A new species of Cromata Rolston from Brazilian and Venezuelan Amazon Forest (Hemiptera: Pentatomidae: Discocephalinae)
FIGURES 2–6. Cromata graziae, sp. nov., female and male genitalia. Fig. 2, female genital plates, ventroposterior view. (gc8 = gonocoxites 8; gc9 = gonocoxites 9; la8 = laterotergites 8; la9 = laterotergites 9; sp = spiracle). Figs. 3–6, pygophore, ventral, dorsal, posterior and lateral view respectively. (c = carina; dp = dorsal process over pygophore; fr = hair fringes; p = posterolateral angle; pr = proctiger; vr = ventral rim).
FIGURE 2. Notostrix spinula n in A new genus and five new species of Eriophyoidea (Prostigmata) associated with palm trees from Brazilian Amazon
FIGURE 2. Notostrix spinula n. sp. D. Dorsal habitus of female. V. Ventral habitus of female. L. Lateral habitus of female. CGM. Coxigenital region of male. L1. Leg I. L2. Leg II. E. empodium.
FIGURE 1. Euterpia fissa n. gen n in A new genus and five new species of Eriophyoidea (Prostigmata) associated with palm trees from Brazilian Amazon
FIGURE 1. Euterpia fissa n. gen n. sp. D. Dorsal habitus of female. V. Ventral habitus of female. CGM. Coxigenital region of male. L1. Leg I. L2. Leg II. E. Empodium. ANT. Antapical seta (d).
FIGURE 5. Propilus tavaresi n in A new genus and five new species of Eriophyoidea (Prostigmata) associated with palm trees from Brazilian Amazon
FIGURE 5. Propilus tavaresi n. sp. D. Dorsal habitus of female. V. Ventral habitus of female. CGM. Coxigenital region of male. L1. Leg I. L2. Leg II. E. Empodium.
FIGURE 4. Propilus alternatus n in A new genus and five new species of Eriophyoidea (Prostigmata) associated with palm trees from Brazilian Amazon
FIGURE 4. Propilus alternatus n. sp. D. Dorsal habitus of female. V. Ventral habitus of female. CGM. Coxigenital region of male. L1. Leg I. L2. Leg II. E. Empodium.
FIGURE 3. Palmiphytoptus barbosae n in A new genus and five new species of Eriophyoidea (Prostigmata) associated with palm trees from Brazilian Amazon
FIGURE 3. Palmiphytoptus barbosae n. sp. D. Dorsal habitus of female. V. Ventral habitus of female. CGM. Coxigenital region of male. L1. Leg I. L2. Leg II. E. Empodium.
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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)
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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.