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427 results for “Ducks”
FIGURES 40–42 in Three new bee species of Rhophitulus Ducke (Hymenoptera, Apidae, Protandrenini) from Argentina and Brazil
FIGURES 40–42. Lectotype male of Rhophitulus steinbachi (Friese, 1916): 40. head in frontal view. 41, lateral view. 42, labels associated to the specimen. Scale bar = 0.5 mm.
FIGURES 28–36 in Three new bee species of Rhophitulus Ducke (Hymenoptera, Apidae, Protandrenini) from Argentina and Brazil
FIGURES 28–36. Male terminalia of Rhophitulus xenopalpus n. sp.: 28, T7 in dorsal view. 29, S6 in ventral view. 30, S7 in ventral view. 31, S7 in lateral view. 32, S8 in ventral view. 33, S8 in lateral view. 34, genitalia in ventral view. 35, genitalia in dorsal view. 36, genitalia in lateral view. Scale bar 0.2 mm.
FIGURES 19–27. Rhophitulus xenopalpus n in Three new bee species of Rhophitulus Ducke (Hymenoptera, Apidae, Protandrenini) from Argentina and Brazil
FIGURES 19–27. Rhophitulus xenopalpus n. sp.: 19, female (holotype), head in frontal view. 20, female (holotype), lateral view. 21, female (holotype), mesosoma in dorsal view. 22, male, head in frontal view. 23, male, lateral view. 24, male, mesosoma in dorsal view. 25, female, detail of the unique labial palpus. 26, female, detail of labral plate. 27, female, metasoma in dorsal view.
FIGURES 37–39 in Three new bee species of Rhophitulus Ducke (Hymenoptera, Apidae, Protandrenini) from Argentina and Brazil
FIGURES 37–39. Stylopized female of Rhophitulus xenopalpus n. sp.: 37, head in ventral view. 38, lateral view. 39, detail of the Strepsiptera between apical metasomal terga.
FIGURES 13–18 in Three new bee species of Rhophitulus Ducke (Hymenoptera, Apidae, Protandrenini) from Argentina and Brazil
FIGURES 13–18. Male genitalia and associated sterna of Rhophitulus mimus n. sp.: 13, S7 in ventral view. 14, S8 in ventral view. 15, S8 in lateral view. 16, genitalia in ventral view. 17, genitalia in dorsal view. 18, genitalia in lateral view. Scale bar 0.2 mm.
FIGURES 7–12. Rhophitulus mimus n in Three new bee species of Rhophitulus Ducke (Hymenoptera, Apidae, Protandrenini) from Argentina and Brazil
FIGURES 7–12. Rhophitulus mimus n. sp.: 7, female (holotype), head in frontal view. 8, female (holotype), lateral view. 9, male, head in frontal view. 10, male, lateral view. 11, female (holotype), mesosoma in dorsal view. 12, male, mesosoma in dorsal view.
FIGURES 1–6 in Three new bee species of Rhophitulus Ducke (Hymenoptera, Apidae, Protandrenini) from Argentina and Brazil
FIGURES 1–6. Holotype female of Rhophitulus labiosus n. sp.: 1, head in frontal view. 2, lateral habitus. 3, detail of the unique labial palpus. 4, fore- and hind wings. 5, mesosoma in dorsal view. 6, metasoma in dorsal view.
FIGURES 5–8. 5 in A new species of the genus Protopolybia Ducke, 1905 (Hymenoptera, Vespidae, Polistinae), with taxonomic contributions to the exigua species-group
FIGURES 5–8. 5. Protopolybia similis, head, lateral view; 6. P. diligens, head on frontal view; 7. P. diligens, scutellum, metanotum and propodeum on dorsal view; 8. P. minutissima, head on lateral view. gm, genal margin; clp, clypeus; mp, metanotal process.
FIGURES 9–14 in A new species of the genus Protopolybia Ducke, 1905 (Hymenoptera, Vespidae, Polistinae), with taxonomic contributions to the exigua species-group
FIGURES 9–14. Protopolybia minutissima, ♂. 9. Head, frontal view; 10. Lateral view; 11. Paramere of male genitalia; 12. Aedeagus, ventral view; 13. Aedeagus, lateral view; 14. Volsella, lateral view. Scale for 11–14 = 0.2 mm.
FIGURES 15–20. Nests. 15, 16 in A new species of the genus Protopolybia Ducke, 1905 (Hymenoptera, Vespidae, Polistinae), with taxonomic contributions to the exigua species-group
FIGURES 15–20. Nests. 15, 16. Protopolybia diligens oval shape, lateral view; 17, 18. P. diligens elongate shape, lateral view; 19. P. clypeata frontal view, 20. P. clypeata, lateral view (Font: AMNH collection—http://research.amnh.org/iz/hymenoptera/collection/ display.php?sid=401247).
FIGURES 1–4 in A new species of the genus Protopolybia Ducke, 1905 (Hymenoptera, Vespidae, Polistinae), with taxonomic contributions to the exigua species-group
FIGURES 1–4. Protopolybia lidiae, sp. nov. 1. Head, frontal view; 2. Head, lateral view; 3. Scutellum, metanotum and propodeum, dorsal view; 4. Holotype specimen, lateral view. clp, clypeus; mp, metanotal process; gm, genal margin.
Duck pan-genome reveals two transposon-derived structural variations caused bodyweight enlarging and white plumage phenotype formation during evolution
<p><span>Structural variations (SVs) are a major source of domestication and improvement traits. We present the first duck pan-genome constructed using five genome assemblies capturing ~40.98 Mb new sequences. This pan-genome together with high-depth sequencing data (>46.5X) identified 101,041 SVs, of which substantial proportions were derived from transposable element (TE) activity. Many TE-derived SVs anchored in a gene body or regulatory region are linked to domestication and improvement. By combining quantitative genetics with molecular experiments, we dissect how TE-derived SVs change gene expression of <em>IGF2BP1</em> and generate novel transcripts of <em>MITF</em>, shaping body weight and plumage color. In the <em>IGF2BP1</em> locus, the TE-derived SV explains the largest effect on body weight among avian species (27.61% of phenotypic variation). Our findings highlight the </span><span>importance of using a pan-genome as a reference in genomics studies</span><span> and explore the roles of TE-derived SVs in trait formation and in livestock breeding.</span></p>
FIGURE 4. Alexa grandiflora Ducke. A in Alexa duckeana (Leguminosae-Papilionoideae): a new species from the Brazilian Amazon
FIGURE 4. Alexa grandiflora Ducke. A. Flower in pre-anthesis showing the apex of the petals, stamens, and gynoecium. B. Flower in anthesis. C. Lateral view of an anthetic flower showing the calyx, anthers, style, and stigma. D. Flower in anthesis demonstrating the difference between the vexillum, wing, and keel petals. Photos: A. Guilherme Silva; B–D: Marcus Falcao.
Figs. 41– 46. Reserva Ducke dung beetles. 41 in The Dung- and Carrion-Feeding Scarabs (Coleoptera: Scarabaeoidea) of an Amazonian Blackwater Rainforest: Results of a Continuous, 56-Week, Baited-PitfallTrap Study
Figs. 41– 46. Reserva Ducke dung beetles. 41) Deltochilum carinatum. Photograph by Jim McClarin; 42) Deltochilum septemstriatum. Photograph by Denis Faure; 43) Deltochilum pseudoicarus. Photograph by Trond Larsen; 44) Ateuchus sp. Photograph by Jim McClarin; 45) Canthidium bicolor with phoretic mite. Photograph by Trond Larsen; 46) Canthidium gerstaeckeri. Photograph by Trond Larsen. All images used by permission.
Figs. 35–40. Reserva Ducke dung beetles. 35 in The Dung- and Carrion-Feeding Scarabs (Coleoptera: Scarabaeoidea) of an Amazonian Blackwater Rainforest: Results of a Continuous, 56-Week, Baited-PitfallTrap Study
Figs. 35–40. Reserva Ducke dung beetles. 35) Onthophagus bidentatus. Photograph by Denis Faure; 36) Onthophagus rubrescens. Photograph by Trond Larsen; 37) Eurysternus caribaeus. Photograph by Trond Larsen; 38) Canthon quadriguttatus rolling a small piece of howler dung spattered on a leaf about 1 m above the ground. Photograph by Trond Larsen; 39) Canthon triangularis. Photograph by Trond Larsen; 40) Cryptocanthon peckorum. Photograph by Trond Larsen. All images used by permission.
Figs. 47–52. Reserva Ducke dung beetles. 47 in The Dung- and Carrion-Feeding Scarabs (Coleoptera: Scarabaeoidea) of an Amazonian Blackwater Rainforest: Results of a Continuous, 56-Week, Baited-PitfallTrap Study
Figs. 47–52. Reserva Ducke dung beetles. 47) Dichotomius boreus. Photograph by Trond Larsen; 48) Dichotomius mamillatus. Photograph by Trond Larsen; 49) Uroxys pygmaeus. Photograph by Trond Larsen; 50) Coprophanaeus lancifer. Photograph by Trond Larsen; 51) Oxysternon conspicillatum. Photograph by Doug Emlen and Mark Rowland; 52) Phanaeus chalcomelas. Photograph by Trond Larsen. All images used by permission.
Coastal Satellite Image Segmentation (Water and Land) Labels: Delmarva (USA), Virginia Beach (USA), New Jersey (USA), Long Island (USA), Duck, NC (USA), Northern Tuscany Littoral Cell (Italy), Torrey Pines, CA, (USA), Narrrabeen Beach (Australia), Truc Vert (France)
<p>Contained here are jpegs containing coastal RGB satellite images along with a water vs. land mask. Each image is 256 pixels by 256 pixels. </p> <p>Geographic scope: Delmarva (USA), Virginia Beach (USA), New Jersey (USA), Long Island (USA), Duck, NC (USA), Northern Tuscany Littoral Cell (Italy), Torrey Pines, CA, (USA), Narrrabeen Beach (Australia), Truc Vert (France)</p> <p>Temporal range: 1984 to 2022</p> <p>Satellites: Landsat 5, 7, 8 and Sentinel-2</p> <p>All images were downloaded from Google Earth Engine using CoastSat download tools.</p> <p>The datasets are arranged into 'train', 'val', and 'test' folders. Within each of those folders are two folders 'a' and 'b'. 'a' contains the images (RGB), whereas 'b' contains the labels (land vs. water mask).</p> <p>All images were augmented with the four following augmentations: horizontal flip, vertical flip, 90 degree clockwise rotation, 90 degree counterclockwise rotation, and a horizontal+vertical flip. </p> <p>For training a new segmentation model, it is advised to not do any of these rotational or flip augmentations since they have already been performed. Instead, possibly experiment with other augmentations like introducing noise into the imagery.</p> <p>These images were used to train an image-to-image translation generative adversarial network. The code and model weights (generator and discriminator) are available at <a href="https://github.com/mlundine/Shoreline_Extraction_GAN">https://github.com/mlundine/Shoreline_Extraction_GAN</a>.</p> <p>To get to the files locally, you can download the .zip from Zenodo and then unzip the .zip file.</p>
Winged Duck - Conformal Microstructure Synthesis in Trimmed Trivariate based V-reps.
<p>An example of a trimmed trivariate volumetric model (VModel), populated with trivariate microstructures. "MacroVMdlDuck.itd" contains a trimmed trivariate VModel that represents a macro shape of the winged duck, and "MicroTileTrivDuck.itd" contains a list of B-spline trivariates that represents the micro tiles filling the interior of the duck. The microstructures in the file have different colors depending on their types: green tiles are fully inside the primitive trivariates of the winged duck (e.g. body, and two wings), red tiles are the special bridging tiles connecting the body and the wings, and yellow tiles are the inside tiles used in anchoring different primitives of the model. Each tile trivariate is given a unique integer ID and stores the additional information such as the neighboring trivariates, the parametric domain in which the tile occupies (in case of the regular tile only) and colliding trivariates (in case of bridging tiles only made from sweeping only) in its attributes.</p> <p>Duck model is provided, in IRIT (<a href="https://www.cs.technion.ac.il/~irit/">https://www.cs.technion.ac.il/~irit/</a>) ITD file format, as trivariates, and in IGES file format as<br> surfaces.</p> <p>"MacroMdlDuck.igs" contains a list of trimmed surfaces that are converted from the macro VModel in MacroVMdlDuck.itd.</p> <p><br> "MicroTileSrfDuck.igs" contains a list of surfaces that are extracted from the boundary of trivariate micro tiles in MicroTileTrivDuck.itd.</p>
American black duck PTT data from Atlantic Canada
<p><span>American black ducks, native to eastern North America, have been the focus of significant international conservation and management programs. The combined USA and Canadian population has traditionally been managed as a single population; however black duck demographics may vary by region. To help understand potential regional differences in black ducks, we used satellite telemetry to assess migratory chronology and movements of black ducks wintering near Windsor, Nova Scotia, Canada, near the northern limits of their wintering range where numbers are increasing. Wintering black ducks from Nova Scotia did not leave the Atlantic Flyway and included both longer-distance migrants (~ 1 500 km north) and locally-breeding individuals. None of our tracked ducks travelled south of Nova Scotia during any part of the annual cycle, indicating a population segment that never leaves Canada and is subject solely to Canadian harvest pressures. Band recovery data revealed that a small portion (2.4%) of black ducks originally banded during winter in Nova Scotia were recovered south along the east coast of the USA, indicating that some of these black ducks are subject to international harvest pressures. Our results show that there are differences in annual black duck movements even within a small part of their range, adding to the growing evidence that black duck populations show fine-scale temporal and spatial structure. This structure will need to be considered in future interprovincial and international harvest management plans of this important species.</span></p>
Top-down effects override climate forcing on reproductive success in a declining sea duck
Population performance is predicted to be more strongly influenced by detrimental species interactions such as predation under benign climatic conditions, and by climate forcing under harsh conditions, reflected in geographical gradients in biotic interaction strength. Less appreciated is the potential for site-specific changes in drivers with the advent of anthropogenic alteration of predator-prey relationships, including apex predator restoration and spread of invasive predators. Particularly interesting is the relative impact of climate and biotic interactions on population performance when these conflict. In this 31-year study (1990-2020), we revisit a common eider (Somateria mollissima) population from SW Finland, Baltic Sea, fifteen years on from an earlier study showing that climate warming positively affected reproductive parameters and performance. However, the population is simultaneously exposed to increasing predation by the rapidly recovering native apex predator and invasive mammals. Based on the current population trend, we predicted (i) a weakening of the previously documented positive effects of a warming climate on vital rates, (ii) intensified predation, and (iii) increasing top-down control of vital rates and accompanying population decline. Five out of seven breeding parameters (annual spread in female body condition, breeding phenology and synchrony, interval between arrival and breeding, fledgling production) were best explained by predation indices, whereas climate signals (winter NAO, Baltic Sea maximum ice cover) on breeding parameters have weakened. Particularly intriguing is that the previous positive association between mild ice winters and subsequent reproductive output has disappeared during the past 15 years, highlighting the non-linear nature of climate change responses. Indirect predation effects (selective disappearance, changed reproductive strategies, nest-site selection and population age distribution) can potentially explain also the remaining breeding parameters (annual mean body condition and clutch size). The observed regime shift in predation risk appears to prevent this now endangered population from reaping the potential benefits of a warming climate.
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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.