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2,353 results for “channel”
Bed morphology adjustment under the impact of a near-bank emergent model vegetation patch: implications for urban channel restoration
<p>The dataset (including videos) are uploaded to support the research study <strong>Bed morphology adjustment under the impact of a near-bank emergent model vegetation patch: implications for urban channel restoration</strong> </p>
Data from: Variation across river channels in demographic dynamics of a riparian herb with threatened status: management and conservation implications
PREMISE OF THE STUDY: Gesneria pauciflora is a rare-threatened plant growing in riparian forests. Periodic disturbances, expected in this habitat, could influence demographic dynamics on plant populations, yet their impact may not be the same across watershed. We hypothesize that differences in disturbances between the main-channel and tributaries may lead to spatial dissimilarities in population growth rate (λ), structure, and fecundity. METHODS: 1277 plants were tagged and monitored over a 1.5-years period. Every 6-months we measured plant size, survival and fecundity, in addition to appearance of seedlings. These variables were applied in Integral Projection Models to assess the population status of G. pauciflora. KEY RESULTS: Plants in the main-channel were smaller but were more likely to flower and fruit than those in the tributaries. Overall mortality was greater in the main-channel and more so during the rainy season. At both sites λ ranged from 0.9114-0.9865, and survival/growth of larger plants had a greater effect on lambda (> 0.90) regardless of site. CONCLUSIONS: Lambda values suggest that G. pauciflora is declining across the watershed. Higher mortality rates in the main channel (more-perturbed sites) might driving G. pauciflora to reproduced at smaller sizes, while the tributaries (less-perturbed sites) may benefit growth and lead to larger plant sizes. Extreme climatic events are expected to increase in the Caribbean and might decrease the population if left unmanaged. Management strategies that reduce the time plants require to reach larger sizes might be necessary to increase λ, and reintroduction of cuttings might be a possible solution.
'The last channel': Vision at the temporal margin of the field
<p class="western">The human visual field, on the temporal side, extends to at least 90 degrees from the line of sight. Using a two-alternative forced-choice procedure in which observers are asked to report the direction of motion of a Gabor patch, and taking precautions to exclude unconscious eye movements in the direction of the stimulus, we show that the limiting eccentricity of image-forming vision can be established with precision. There are large, but reliable, individual differences in the limiting eccentricity. The limiting eccentricity exhibits a dependence on log contrast; but it is not reduced when the modulation visible to the rods is attenuated, a result compatible with the histological evidence that the outermost part of the retina exhibits a high density of cones. Our working hypothesis is that only one type of neural channel is present in the far periphery of the retina, a channel that responds to temporally modulated stimuli of low spatial frequency and that is directionally selective.</p>
Data from: Pathology and epidemiology of ceruminous gland tumors among endangered Santa Catalina Island foxes (Urocyon littoralis catalinae) in the Channel Islands, USA
In this study, we examined the prevalence, pathology, and epidemiology of tumors in free-ranging island foxes occurring on three islands in the California Channel Islands, USA. We found a remarkably high prevalence of ceruminous gland tumors in endangered foxes (Urocyon littoralis catalinae) occurring on Santa Catalina Island (SCA) - 48.9% of the dead foxes examined from 2001-2008 had tumors in their ears, and tumors were found in 52.2% of randomly-selected mature (≥ 4 years) foxes captured in 2007-2008, representing one of the highest prevalences of tumors ever documented in a wildlife population. In contrast, no tumors were detected in foxes from San Nicolas Island or San Clemente Island, although ear mites (Otodectes cynotis), a predisposing factor for ceruminous gland tumors in dogs and cats, were highly prevalent on all three islands. On SCA, otitis externa secondary to ear mite infection was highly correlated with ceruminous gland hyperplasia (CGH), and tumors were significantly associated with the severity of CGH, ceruminous gland dysplasia, and age group (older foxes). We propose a conceptual model for the formation of ceruminous gland tumors in foxes on SCA that is based on persistent, ubiquitous infection with ear mites, and an innate, over exuberant inflammatory and hyperplastic response of SCA foxes to these mites. Foxes on SCA are now opportunistically treated with acaricides in an attempt to reduce mite infections and the morbidity and mortality associated with this highly prevalent tumor.
FIGURE 32 in Sublittoral and bathyal sea cucumbers (Echinodermata: Holothuroidea) from the Northern Mozambique Channel with description of six new species
FIGURE 32. Molpadia lenticulum (Cherbonnier & Féral, 1981). A: Dorsal view of specimen IE-2007-778(1). B: SEM photos of ossicles from the tail. Scale bars: A = 1cm; B = 100µm.
FIGURE 29. Ophnurgus natalasper Thandar, 1992. A–B in Sublittoral and bathyal sea cucumbers (Echinodermata: Holothuroidea) from the Northern Mozambique Channel with description of six new species
FIGURE 29. Ophnurgus natalasper Thandar, 1992. A–B: Dorsal view (A) and ventral view (B) of specimen IE-2007-801. C– E: SEM photos of ossicles from the anterior part of dorsal body wall (C) anterior (D) and posterior (E) part of ventral body wall. Scale bars: A,B = 1cm; C,D,E = 100µm.
FIGURE 33 in Sublittoral and bathyal sea cucumbers (Echinodermata: Holothuroidea) from the Northern Mozambique Channel with description of six new species
FIGURE 33. Molpadia thandari sp. nov. A: Dorsal view of the paratype; B–C: SEM photos of ossicles from dorsal body wall (B) and tail (C). Scale bars: A = 1cm; B,C = 50µm.
FIGURE 26 in Sublittoral and bathyal sea cucumbers (Echinodermata: Holothuroidea) from the Northern Mozambique Channel with description of six new species
FIGURE 26. Sclerodactyla multipes (Théel, 1868). A: Lateral view of specimen IE-2007-767; B–C: SEM photos of ossicles from introvert (B) and dorsal body wall (C). Scale bars: A = 1cm; B = 20µm; C = 50µm.
FIGURE 18. Kareniella gracilis Heding, 1940. A–B in Sublittoral and bathyal sea cucumbers (Echinodermata: Holothuroidea) from the Northern Mozambique Channel with description of six new species
FIGURE 18. Kareniella gracilis Heding, 1940. A–B: Dorsal (A) and ventral (B) views of specimen IE-2007-803; C: SEM photos of ossicles from the body wall. Scale bars: A, B = 1cm; C = 50µm.
FIGURE 15 in Sublittoral and bathyal sea cucumbers (Echinodermata: Holothuroidea) from the Northern Mozambique Channel with description of six new species
FIGURE 15. Amphigymnas woodmasoni (Walsh, 1891). A: dorsal view of specimen IE-2007-798, B: SEM view of ossicles from the body wall. Scale bars: A = 1cm; B = 50µm.
FIGURE 16 in Sublittoral and bathyal sea cucumbers (Echinodermata: Holothuroidea) from the Northern Mozambique Channel with description of six new species
FIGURE 16. Bathyplotes natans (Sars, 1868). A–B: Dorsal (A) and ventral (B) views of specimen IE-2007-772. C–D: SEM photos of ossicles from the body wall (C), the longitudinal muscles and cloaca (D). Scale bars: A,B = 1cm; C = 20µm; D = 10µm.
FIGURE 23 in Sublittoral and bathyal sea cucumbers (Echinodermata: Holothuroidea) from the Northern Mozambique Channel with description of six new species
FIGURE 23 Pentacta doliolum (Pallas, 1766). A: Lateral view of specimen IE-2007-809; B: SEM photos of ossicles from the body wall. Scale bars: A = 1cm; B = 100µm; C = 10µm.
FIGURE 11. Mesothuria oktaknemus Sluiter, 1901. A in Sublittoral and bathyal sea cucumbers (Echinodermata: Holothuroidea) from the Northern Mozambique Channel with description of six new species
FIGURE 11. Mesothuria oktaknemus Sluiter, 1901. A: External views of specimens IE-2007-804. B–D: SEM photos od ossicles from dorsal body wall (B), ventral body wall (C) and ventral tube feet (D). Scale bars: A = 1cm; B = 20µm; C,D = 10µm.
FIGURES 20–25. Cribellopora simplex. 20 in Bryozoa from detritic bottoms in the Menorca Channel (Balearic Islands, western Mediterranean), with notes on the genus Cribellopora
FIGURES 20–25. Cribellopora simplex. 20, autozooids (holotype); 21, 22, ovicellate and non ovicellate zooids (holotype); 23, autozooids (MNCN–25.03/3825); 24, primary orifice (MNCN–25.03/3825); 25, ancestrula and periancestrular zooids.
FIGURES 26–29. Cribellopora trichotoma. 26 in Bryozoa from detritic bottoms in the Menorca Channel (Balearic Islands, western Mediterranean), with notes on the genus Cribellopora
FIGURES 26–29. Cribellopora trichotoma. 26, autozooids (Lectotype). 27, primary orifices (lectotype); 28, ovicellate zooids (MM–2896); 29, ancestrula and periancestrular zooids (lectotype).
FIGURES 13–19. Fenestrulina juani n in Bryozoa from detritic bottoms in the Menorca Channel (Balearic Islands, western Mediterranean), with notes on the genus Cribellopora
FIGURES 13–19. Fenestrulina juani n. sp. 13, view of colony (holotype); 14, young colony showing bifurcate spines (MNCN–25.03/3821); 15, ovicellate and non ovicellate zooids (holotype); 16, different degrees of calcification of the ovicell (MNCN–25.03/3821); 17, autozooid showing development of ascopore rim (MNCN–25.03/3821); 18, 19, ancestrula and daughter zooid (MNHN–10382).
FIGURE 6–9. Barrosia balearica n in Bryozoa from detritic bottoms in the Menorca Channel (Balearic Islands, western Mediterranean), with notes on the genus Cribellopora
FIGURE 6–9. Barrosia balearica n. sp. 6, two ovicellate zooids (holotype); 7, ovicell showing the proximal tongue-like process and distal spines (holotype); 8, development of the ovicell (holotype); 9, ancestrula and periancestrular zooids (MNCN–25.03/3809).
FIGURES 2–5. Barrosia balearica n in Bryozoa from detritic bottoms in the Menorca Channel (Balearic Islands, western Mediterranean), with notes on the genus Cribellopora
FIGURES 2–5. Barrosia balearica n. sp. 2, view of colony (MNCN–25.03/3809); 3, another colony (MNCN–25.03/ 3810); 4, autozooids (MNCN–25.03/3810); 5, distribution of uniporous mural septula and ovicellate zooids (holotype).
FIGURE 2. a–d, f., Aquilonastra conandae O in Asterinid seastars from the Mozambique Channel (Echinodermata: Asteroidea: Asterinidae)
FIGURE 2. a–d, f., Aquilonastra conandae O'Loughlin & Rowe, 2006. a, abactinal view of paratype (NMV F107412); b, actinal view of paratype (NMV F107412); c, abactinal spinelets of paratype (NMV F107412); d, actinal view of oral region of paratype (NMV F107412); f, live colour photo of specimen in situ (photo provided by C. Conand). e, Aquilonastra chantalae sp. nov., live colour photo of specimen in situ (photo provided by C. Conand).
FIGURE 1 in Asterinid seastars from the Mozambique Channel (Echinodermata: Asteroidea: Asterinidae)
FIGURE 1. Aquilonastra chantalae sp. nov. a, abactinal view of holotype (MNHN IE–2013–617); b, actinal view of holotype (MNHN IE–2013–617); c, abactinal spinelets of paratype (NMV F189860); d, actinal view of oral region of paratype (NMV F189860); e, actinal view of distal inter-radius and margin of paratype (NMV F189860); f, actinal view of post-fissiparous paratype (MNHN IE–2013–618).
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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
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