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90 results for “large river”
Distribution. Brazilian Amazon, S of the Rio Amazonas, between the Tapajos/Juruena system and the Tocantins/Araguaia river system to the E, in the Brazilian states of Para and Mato Grosso; the exact S limit ofits distribution is unclear, but it seems likely that it coincides with the transition between the Amazon rainforest and the cerrado savannas of C Brazil; this ecotone encompasses headwaters of the Xingu and Tapajos river systems in N Mato Grosso. Vieira's Titi (C. vieirai) is also known to occur in this region, but there are too few records to confirm whether their distributions intergrade, or in fact where the exact limits of their distributions are. One recent study also found that the Red-bellied Titi may be absent from or present at extremely low densities in large areas of the Tocantins-Xingu interfluvium. Given the overall lack of records, while it is clear that the Red-bellied Titi occurs over a vast area of the SE Amazon Basin, the exact limits of its distribution within this area remain unclear. in Phitheciidae
Distribution. Brazilian Amazon, S of the Rio Amazonas, between the Tapajos/Juruena system and the Tocantins/Araguaia river system to the E, in the Brazilian states of Para and Mato Grosso; the exact S limit ofits distribution is unclear, but it seems likely that it coincides with the transition between the Amazon rainforest and the cerrado savannas of C Brazil; this ecotone encompasses headwaters of the Xingu and Tapajos river systems in N Mato Grosso. Vieira's Titi (C. vieirai) is also known to occur in this region, but there are too few records to confirm whether their distributions intergrade, or in fact where the exact limits of their distributions are. One recent study also found that the Red-bellied Titi may be absent from or present at extremely low densities in large areas of the Tocantins-Xingu interfluvium. Given the overall lack of records, while it is clear that the Red-bellied Titi occurs over a vast area of the SE Amazon Basin, the exact limits of its distribution within this area remain unclear.
Distribution. CE & SE Madagascar; until recently restricted to the SC portion of the country's rainforests including Ranomafana and Andringitra national parks, Ambositra-Vondrozo Corridor and isolated forests between and to the E ofthese localities (e.g. Ambolomavo, Ifanadiana, Kianjavato), and one locality N of the Manampatrana River (Evendra); recent surveys have now confirmed its presence in the forests of Torotorofotsy, in the region of Andasibe-Mantadia, and 18 sites in and around the Ankeniheny-Zahamena Corridor, and at five additional sites around the Marolambo forest corridor and as far N as Zahamena National Park, and it extends to near the Midongy du Sud National Park in the S, 670 km S of Zahamena. Reports of large bamboo lemursfitting this species' description have been filtering in from various other remote sites (e.g. Mananara region). in Lemuridae
Distribution. CE & SE Madagascar; until recently restricted to the SC portion of the country's rainforests including Ranomafana and Andringitra national parks, Ambositra-Vondrozo Corridor and isolated forests between and to the E ofthese localities (e.g. Ambolomavo, Ifanadiana, Kianjavato), and one locality N of the Manampatrana River (Evendra); recent surveys have now confirmed its presence in the forests of Torotorofotsy, in the region of Andasibe-Mantadia, and 18 sites in and around the Ankeniheny-Zahamena Corridor, and at five additional sites around the Marolambo forest corridor and as far N as Zahamena National Park, and it extends to near the Midongy du Sud National Park in the S, 670 km S of Zahamena. Reports of large bamboo lemursfitting this species' description have been filtering in from various other remote sites (e.g. Mananara region).
Distribution. Malay Peninsula in S Thailand (only in a small area on the border with Malaysia), NW & C Peninsular Malaysia (largely restricted to mountainous areas in the W of the country, S of the Perak River and N of the Muar River, and Tasek Bera across to the Pahang River), and W Sumatra where confined to the Barisan Mts; it may have formerly occurred on Bangka I. in Hylobatidae
Distribution. Malay Peninsula in S Thailand (only in a small area on the border with Malaysia), NW & C Peninsular Malaysia (largely restricted to mountainous areas in the W of the country, S of the Perak River and N of the Muar River, and Tasek Bera across to the Pahang River), and W Sumatra where confined to the Barisan Mts; it may have formerly occurred on Bangka I.
Nesokia is sister to Bandicota and are nested in Rattus phylogenetically, making Rat- tus paraphyletic. Tarsomys, Limnomys, and Diplothrix are also phylogenetically in Rat- tus, and the clade is in need of focused re- vision at the generic level. Nesokia bunnui was originally described as a separate ge-nus, Erythronesokia, because it is morphologically very distinctive from N. indica. Type specimen was destroyed during the Iraq War, and a neotype was recently designated to replace it. Monotypic. Distribution. Tigris and Euphrates river valleys, SE Iraq. Descriptive notes. Head—body 230-260 mm, tail 205-270 mm, ear 18-21 mm, hindfoot 49-58 mm; weight 519 g. The Long-tailed Bandicoot Rat is larger than the Short-tailed Bandicoot Rat (N. indica). Pelage is soft and woolly, interspersed with harsher coarse hair and long black hairs near mid-back. Dorsum is fawn to ocherous red, washed with purple or chestnuton darker individuals. Hairs are basally slate-gray and distally rufous, occasionally with whitish or black tips. Muzzle is drab. Sides arefawn, with gray edge toward venter. Venteris whitish, extending onto cheeks where the same pattern from gray to fawn to dorsal pelage occurs. Feet are large and robust, being light brown and well-furred dorsally. Claws are amber on forefeet and dull brown on hindfeet; pollux is extremely small. Ears are moderately long and brownish, with no hair internally. Tail is ¢.82-104% of head-body length and deep brownish drab, interspersed with visible white hair. Skull is large and robust, similarly to the Short-tailed Bandicoot Rat. Habitat. Marsh and swamp land. Food and Feeding. No information. Breeding. No information. Activity patterns. The Long-tailed Bandicoot Rat is terrestrial, although it isfound in swampy and marshy areas and is probably amphibious. Movements, Home range and Social organization. No information. Status and Conservation. Classified as Endangered on The IUCN Red List. The Longtailed Bandicoot Rat is apparently rare and is known from very few specimens. Marsh and swamp habitats in which it is found were completely destroyed during the Iraq War by draining, war damage, and agricultural expansion. In recent years, flooding from Tigris and Euphrates rivers and high snow fall and melt haveresulted in partial restoration ofits native habitat, although restoration is not a complete. Populations are now probably highly fragmented. Bibliography. Al-Ansari et al. (2012), Al-Robaae & Felten (1990), Khajuria (1981), Krystufek et al. (2017), Musser & Carleton (2005), Richardson & Hussain (2006), Stuart (2008). in Muridae
Nesokia is sister to Bandicota and are nested in Rattus phylogenetically, making Rat- tus paraphyletic. Tarsomys, Limnomys, and Diplothrix are also phylogenetically in Rat- tus, and the clade is in need of focused re- vision at the generic level. Nesokia bunnui was originally described as a separate ge-nus, Erythronesokia, because it is morphologically very distinctive from N. indica. Type specimen was destroyed during the Iraq War, and a neotype was recently designated to replace it. Monotypic. Distribution. Tigris and Euphrates river valleys, SE Iraq. Descriptive notes. Head—body 230-260 mm, tail 205-270 mm, ear 18-21 mm, hindfoot 49-58 mm; weight 519 g. The Long-tailed Bandicoot Rat is larger than the Short-tailed Bandicoot Rat (N. indica). Pelage is soft and woolly, interspersed with harsher coarse hair and long black hairs near mid-back. Dorsum is fawn to ocherous red, washed with purple or chestnuton darker individuals. Hairs are basally slate-gray and distally rufous, occasionally with whitish or black tips. Muzzle is drab. Sides arefawn, with gray edge toward venter. Venteris whitish, extending onto cheeks where the same pattern from gray to fawn to dorsal pelage occurs. Feet are large and robust, being light brown and well-furred dorsally. Claws are amber on forefeet and dull brown on hindfeet; pollux is extremely small. Ears are moderately long and brownish, with no hair internally. Tail is ¢.82-104% of head-body length and deep brownish drab, interspersed with visible white hair. Skull is large and robust, similarly to the Short-tailed Bandicoot Rat. Habitat. Marsh and swamp land. Food and Feeding. No information. Breeding. No information. Activity patterns. The Long-tailed Bandicoot Rat is terrestrial, although it isfound in swampy and marshy areas and is probably amphibious. Movements, Home range and Social organization. No information. Status and Conservation. Classified as Endangered on The IUCN Red List. The Longtailed Bandicoot Rat is apparently rare and is known from very few specimens. Marsh and swamp habitats in which it is found were completely destroyed during the Iraq War by draining, war damage, and agricultural expansion. In recent years, flooding from Tigris and Euphrates rivers and high snow fall and melt haveresulted in partial restoration ofits native habitat, although restoration is not a complete. Populations are now probably highly fragmented. Bibliography. Al-Ansari et al. (2012), Al-Robaae & Felten (1990), Khajuria (1981), Krystufek et al. (2017), Musser & Carleton (2005), Richardson & Hussain (2006), Stuart (2008).
Large Scratched River Rock (700a2377)
**Large Scratched River Rock** Location: Town Creek site (31Mg2-3), Montgomery County, North Carolina. Period: Mississippian, Pee Dee phase (AD 1150-1400). Material: unspecified igneous rock. Dimensions: length, 25.8 cm; width, 19.5 cm; thickness, 6.5 cm. Notes: Catalog no. 700a2377. North Carolina Archaeological Collection, Research Laboratories of Archaeology, University of North Carolina at Chapel Hill. Model by Sebastian Farris and Steve Davis. Source: Objaverse 1.0 / Sketchfab
XPM-098 Large Biface, Sapsuk River, Alaska
XPM-098. Large biface from Trench 4. Dates 3200 BCE Unit 7 Level 4, catalog number 508. SR08-01-TT-4-U4-L4 Sapsuk River, Nelson Lagoon area, Alaska Peninsula, Alaska. Several salmon fishing sites. Early period dating 3200-2100 BCE, and a later occupation 100 BCE to 500 CE. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing completed at Global Digital Heritage. Maschner, H. et al. 2010. The Archaeology of the Sapsuk River, Alaska. An Occasional Papers Publication. Bureau of Indian Affairs, Alaska Region, Branch of Regional Archaeology, Anchorage. Source: Objaverse 1.0 / Sketchfab
Large Wood Surveys database, Spöl River, Switzerland
<p>The following dataset is derived from wood surveys conducted in the Spöl River (Switzerland) before and after experimental floods released from the Ova-Spin dam. The dataset contains wood coordinate locations, unique identifying numbers, size dimensions (length, diameter, and volume), conditions in which the wood piece was observed (burial, jam, decay, orientation, and roots), and whether the observation is from the pre- or post-flood survey.</p> <p>Only wood greater than ten-centimeters in diameter and one-meter in length were considered.</p>
Estimates of daily river flows for 190 catchments in Great Britain from the GR6J model using CRCM5 large ensemble
<p>Simulated river flows for 200 catchments using the GR6J hydrological model driven by the CRCM5 50-member large ensemble</p>
Data from: Environmental DNA reveals quantitative patterns of fish biodiversity in large rivers despite its downstream transportation
Despite the ecological and societal importance of large rivers, fish sampling remains costly and limited to specific habitats (e.g., river banks). Using an eDNA metabarcoding approach, we regularly sampled 500 km of a large river (Rhône River). Comparisons with long-term electrofishing surveys demonstrated the ability of eDNA metabarcoding to qualitatively and quantitatively reveal fish assemblage structures (relative species abundance) but integrated a larger space than the classical sampling location. Combination of a literature review and field data showed that eDNA behaves in the water column like fine particulate organic matter. Its detection distance varied from a few km in a small stream to more than 100 km in a large river. To our knowledge, our results are the first demonstration of the capacity of eDNA metabarcoding to describe longitudinal fish assemblage patterns in a large river, and metabarcoding appears to be a reliable, cost-effective method for future monitoring.
Data from: Large wood decay state and piece shape in river corridors
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Data from: Contrasting patterns of population structure at large and fine scales in an avian disturbance specialist of braided river ecosystems
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Data from: River banks and channels as hotspots of soil pollution after large-scale remediation of a river basin
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Data from: Hydrology controls recruitment of two invasive cyprinids: bigheaded carp reproduction in a navigable large river
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Data from: Thermal exposure of adult Chinook salmon and steelhead: diverse behavioral strategies in a large and warming river system
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A large wild salmon stock shows genetic and life history differentiation within, but not between, rivers
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Data from: Environmental DNA reveals quantitative patterns of fish biodiversity in large rivers despite its downstream transportation
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Figures 14–23 in New records and diagnostic notes on large carpenter bees (Hymenoptera: Apidae: genus Xylocopa Latreille), from the Amazon River basin of South America
Figures 14–23. Dorsal habitus photographs of pinned, preserved specimens of females of Xylocopa (Schonnherria) species from the Amazon River basin, from the USNM collection. 14) X. (S.) dimidiata. 15) X. (S.) lucida. 16) X. (S.) macrops. 17) X. (S.) metallica. 18) X. (S.) muscaria. 19) X. (S.) ornata. 20) X. (S.) simillima. 21) X. (S.) subcyanea. 22) X. (S.) varians. 23) X. (S.) viridis.
Concentrations and Yields of Total Hg and MeHg in Large Boreal Rivers Linked to Water and Wetland Coverage in the Watersheds
<p>Large rivers are major contributors of mercury (Hg) exports to the ocean, as they integrate processes of loading and loss occurring at the watershed level. Within a watershed, stream-scale studies have revealed that specific landscape features, such as wetlands or lakes, are hotspots for Hg and methylmercury (MeHg) loading, sinks and transformation, but we still do not know how these landscape features operate at the whole network scale and over large geographic gradients. In this study, we evaluate how landscape metrics (vegetation types, wetland and lake cover, climate, hydrology) are related to riverine concentrations and watershed yields of Hg and MeHg in 18 large boreal rivers draining watersheds that range from 44 km<sup>2</sup> to 209 453 km<sup>2</sup>, distributed along a 650 km latitudinal transect in the James Bay region of Québec. Our results reinforce the role of wetlands as sources of MeHg, but further show that surface coverage of water in the watershed is the major driver of both Hg and MeHg concentrations and exports to the coast at the whole network scale. Our findings also demonstrate that seasonality modulates the relationship between landscape features and the various Hg forms. Based on hydrometric data, we additionally estimate annual exports for the whole Eastern James Bay to 441 kg Hg and 15 kg MeHg, for an average landscape yield of 1.24 g Hg km<sup>-2</sup> y<sup>-1</sup> and 0.041 g MeHg km<sup>-2</sup> y<sup>-1</sup>. Our study provides tools to broadly predict riverine Hg concentrations and exports with only a few easily accessible landscape metrics.</p>
Raw data for "Unsteady secondary flow structure at a large river confluence"
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FIGURE 5 in First study of food webs in a large glacial river: the trophic role of invasive trout
FIGURE 5 | Midstream and Upstream areas food webs scheme done considering stable isotopes and stomach content analysis. Dark arrows indicate a higher contribution to diet. Rainbow Trout is placed above Perch, Chinook, and Brown Trout since when analyzing stomach content, it trophic role depends on the ontogenetic stage. CF= collector-filterer, CG= collector-gatherer, SCR=scrapers, SHR= shredders, PRED= predator.
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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.