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172 results for “shape analysis”
FIGURE 1 in Otolith shape analysis supports three cryptic species in the Stellifer punctatissimus complex (Acanthuriformes: Sciaenidae)
FIGURE 1 | Map of the study area highlighting the sampling sites in the Bahia State, Brazil. B. Representative specimens of the species studied. Stellifer gomezi (top); S. menezesi (middle); S. punctatissimus (bottom). Scale bars = 10 mm.
FIGURE 6 in Otolith shape analysis supports three cryptic species in the Stellifer punctatissimus complex (Acanthuriformes: Sciaenidae)
FIGURE 6 | Linear Discriminant Analysis (LDA) of contour shape according to elliptical Fourier descriptors (EFDs). GM = Stellifer gomezi, MN = S. menezesi, PC = S. punctatissimus.
Figure 2 in Using otolith shape analysis to distinguish barracudas Sphyraena sphyraena and Sphyraena viridensis from the Algerian coast
Figure 2. - Photographs of left (L) and right (R) sagittal otoliths of S. sphyraena (LT = 37 cm) and S. viridensis (LT = 53 cm), captured in the Gulf of Annaba.
Figure 3 in Using otolith shape analysis to distinguish barracudas Sphyraena sphyraena and Sphyraena viridensis from the Algerian coast
Figure 3. - Canonical discriminant analysis achieved with both otolith of the two species of Barracuda Sphyraena sphyraena (S. s) and Sphyraena viridensis (S. v) (x) S. s right, (o) S. s left, (+) S. v right and (Δ) S.v left.
Figure 7 in Epiplastral and geographic variation in Echmatemys, a geoemydid turtle from the Eocene of North America: A multi-tiered analysis of epiplastral shape complexity
Figure 7. Results of sliding semilandmark process from 3D data, and specimens warped along Principal Component 1 (PC1). A. Thin plate spline deformation grid showing transformation of Echmatemys callopyge mean type along PC1. B. 3D image of Echmatemys callopyge showing the positions of landmarks along the curve indicated in A, specimen no.UNMN.VP.27621. C. 3D image of Echmatemys uintensis showing the positions of landmarks along the curve indicated in D, UMNH.VP.27429. D. Thin plate spline deformation grid showing transformation of E. uintensis mean type along PC1.
Figure 5 in Epiplastral and geographic variation in Echmatemys, a geoemydid turtle from the Eocene of North America: A multi-tiered analysis of epiplastral shape complexity
Figure 5. Principal components plots from geometric morphometric analyses of 2D epiplastral shape data. A. Dorsal epiplastral shape: PC1 (49.3% variance) versus PC2 (16.7% variance). B. Ventral epiplastral shape: PC 1 (47.7% variance) versus PC2 (20.8%) variance.
Figure 4 in Epiplastral and geographic variation in Echmatemys, a geoemydid turtle from the Eocene of North America: A multi-tiered analysis of epiplastral shape complexity
Figure 4. Plot of Tooth-Midline versus Tooth-Lip (TM/TL) values for each specimen. The correlation between these two variables is significant (R2=0.403). Correlation coefficients do not differ significantly between any pair of taxa.
Figure 1 in Epiplastral and geographic variation in Echmatemys, a geoemydid turtle from the Eocene of North America: A multi-tiered analysis of epiplastral shape complexity
Figure 1. Morphological differences in dorsal epiplastral shape between Uintan Echmatemys species. A. Echmatemys callopyge (UMNH.VP.27220). B. Echmatemys uintensis (UMNH.VP.26558). The gular scale is indicated in grey.
Figure 2. A in Epiplastral and geographic variation in Echmatemys, a geoemydid turtle from the Eocene of North America: A multi-tiered analysis of epiplastral shape complexity
Figure 2. A. Standard linear measurements for quantifying the dimensions of the gular scale on the epiplastron of Echmatemys species depicted on UMNH.VP.27220. TM=tooth-midline: Distance between the epiplastral tooth and the anatomical midline. TL=tooth-lip: Distance between the epiplastral tooth and the caudal lip of the gular-humeral sulcus. B. Two-dimensional epiplastral landmarks and semilandmarks used in 2D geometric morphometric comparisons of this study: Ventral surface. Data points were digitized from digital photographs. C. Three-dimensional epiplastral landmarks and semilandmarks used in 3D geometric morphometric analyses in this study. All data points were obtained from 3D NextEngine laser scans. Scale bar=2 cm.
Text-fig. 54. Scanning electron microscope (SEM; a–e, g, h) and synchrotron x-ray microscopy (SRXTM; f, i) images of unnamed angiosperm fruits and seeds; Torres Vedras locality, Portugal. a) Follicle sp. 1, narrow elongate follicle with sessile and decurrent stigma; b) Follicle sp. 2, broad, dehisced follicle with elongate and transverse fibers lining the locule; c) Angiosperm seed sp. 1 with thin, smooth seed coat; d) Angiosperm seed sp. 2 with verrucate seed coat; e) Angiosperm seed sp. 3 with exotestal and foveolate seed coat; f) Angiosperm seed sp. 4 with smooth seed coat; g, h) Angiosperm seed sp. 5 with raised epidermal cells forming a reticulate pattern; i) Wedge-shaped angiosperm fruit with remains of floral parts near apex. Specimens, TV43-S136726 (a), TV44-S148144 (b), TV43-S170074 (c), TV43-S136747 (d), TV43-S170073 (e), TV38-S174615 (f), TV44-S148003 (g), TV44-S148004 (h), TV43-S174685 (i). Scale bars 300 Μm (a–i). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 54. Scanning electron microscope (SEM; a–e, g, h) and synchrotron x-ray microscopy (SRXTM; f, i) images of unnamed angiosperm fruits and seeds; Torres Vedras locality, Portugal. a) Follicle sp. 1, narrow elongate follicle with sessile and decurrent stigma; b) Follicle sp. 2, broad, dehisced follicle with elongate and transverse fibers lining the locule; c) Angiosperm seed sp. 1 with thin, smooth seed coat; d) Angiosperm seed sp. 2 with verrucate seed coat; e) Angiosperm seed sp. 3 with exotestal and foveolate seed coat; f) Angiosperm seed sp. 4 with smooth seed coat; g, h) Angiosperm seed sp. 5 with raised epidermal cells forming a reticulate pattern; i) Wedge-shaped angiosperm fruit with remains of floral parts near apex. Specimens, TV43-S136726 (a), TV44-S148144 (b), TV43-S170074 (c), TV43-S136747 (d), TV43-S170073 (e), TV38-S174615 (f), TV44-S148003 (g), TV44-S148004 (h), TV43-S174685 (i). Scale bars 300 Μm (a–i).
Text-fig. 45. Scanning electron microscope (SEM) images of monocolpate pollen of Dinisia portugallica gen. et sp. nov. from a fragmentary stamen; Torres Vedras locality, Portugal. a) Holotype; stamen fragment showing elongated pollen sacs that yielded the pollen in this Text-figure; b) Two pollen grains showing poorly defined distal aperture (arrowhead) and distinctive vermiform reticulum forming luminae of variable shapes and sizes; note especially the irregularly and incomplete reticulum in the grain on the left; c) Reticulum showing smooth, vermiform muri attached to the smooth surface of the foot layer by long columellae; note that columellae often terminate segments of muri that are not closed; d, e) Pollen grains showing proximal surface (d), poorly defined distal aperture (e, arrowhead) and distinctive vermiform reticulum supported by long columellae; note dense covering of small, spherical orbicules on the inner surface of the anther wall. Specimen, TV44-S148216 (holotype). Scale bars 300 Μm (a), 6 Μm (b, d, e), 3 Μm (c). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 45. Scanning electron microscope (SEM) images of monocolpate pollen of Dinisia portugallica gen. et sp. nov. from a fragmentary stamen; Torres Vedras locality, Portugal. a) Holotype; stamen fragment showing elongated pollen sacs that yielded the pollen in this Text-figure; b) Two pollen grains showing poorly defined distal aperture (arrowhead) and distinctive vermiform reticulum forming luminae of variable shapes and sizes; note especially the irregularly and incomplete reticulum in the grain on the left; c) Reticulum showing smooth, vermiform muri attached to the smooth surface of the foot layer by long columellae; note that columellae often terminate segments of muri that are not closed; d, e) Pollen grains showing proximal surface (d), poorly defined distal aperture (e, arrowhead) and distinctive vermiform reticulum supported by long columellae; note dense covering of small, spherical orbicules on the inner surface of the anther wall. Specimen, TV44-S148216 (holotype). Scale bars 300 Μm (a), 6 Μm (b, d, e), 3 Μm (c).
Text-fig. 20. Scanning electron microscope (SEM) images of fruits of Hedyflora (a–d), stamen with in situ Asteropollis sp. pollen (e–g), and Hedyosmum-like staminate inflorescence (h); Torres Vedras locality, Portugal. a, b) Hedyflora sp. 1, lateral and apical views of fruits showing the triangular cross-section, remains of three tepals, apical style and the three lateral "windows" in the hypanthium; c, d) Hedyflora sp. 2, lateral views of fruits showing three well-preserved tepals, apical style and the lateral "windows" in the hypanthium; note the papillae on the lateral wall and around the base of the style; e, f, g) Stamen (f) with in situ pollen of Asteropollis sp. showing the poorly defined star-shaped apertural area (e) and reticulate tectum, with the muri ornamented by small verrucae (g); h) Hedyosmum-like staminate inflorescence with five whorls of tetrasporangiate stamens. Specimens, TV43-S101749 (a, b), TV43-S101307 (c, d), TV44-S137917 (e–g), TV39-S101220 (h). Scale bars 300 Μm (a–d, f, h), 6 Μm (e), 1.5 Μm (g). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 20. Scanning electron microscope (SEM) images of fruits of Hedyflora (a–d), stamen with in situ Asteropollis sp. pollen (e–g), and Hedyosmum-like staminate inflorescence (h); Torres Vedras locality, Portugal. a, b) Hedyflora sp. 1, lateral and apical views of fruits showing the triangular cross-section, remains of three tepals, apical style and the three lateral "windows" in the hypanthium; c, d) Hedyflora sp. 2, lateral views of fruits showing three well-preserved tepals, apical style and the lateral "windows" in the hypanthium; note the papillae on the lateral wall and around the base of the style; e, f, g) Stamen (f) with in situ pollen of Asteropollis sp. showing the poorly defined star-shaped apertural area (e) and reticulate tectum, with the muri ornamented by small verrucae (g); h) Hedyosmum-like staminate inflorescence with five whorls of tetrasporangiate stamens. Specimens, TV43-S101749 (a, b), TV43-S101307 (c, d), TV44-S137917 (e–g), TV39-S101220 (h). Scale bars 300 Μm (a–d, f, h), 6 Μm (e), 1.5 Μm (g).
Data and analysis scripts for: Co-occurrence patterns at four spatial scales implicate reproductive processes in shaping community assembly in clovers
Open the record for dataset details and reuse information.
Data and analysis from: Body mass, temperature, and depth shape the maximum intrinsic rate of population increase in sharks and rays
Open the record for dataset details and reuse information.
Diapause is not selected as a bet-hedging strategy in insects: a meta-analysis of reaction norm shapes
<p>Many organisms escape from lethal climatological conditions by entering a resistant resting stage called diapause, and it is essential that this strategy remains optimally timed with seasonal change. Climate change therefore exerts selection pressure on phenology, which is expected to cause the evolution of mean diapause timing, but also phenotypic plasticity and bet-hedging strategies. Especially the latter as a strategy to cope with unpredictability is so far little considered in the context of climate change, and it is unknown whether it can readily evolve.</p> <p>Contemporary patterns of phenological strategies across a geographic range may provide information about their evolvability. We thus extracted 458 diapause reaction norms from 60 studies. First, we correlated mean diapause timing with mean winter onset. Then we partitioned the reaction norm variance into a temporal component (phenotypic plasticity) and among-offspring variance (diversified bet-hedging) and correlated this variance composition with predictability of winter onset. Contrary to our expectation, mean diapause timing correlated only weakly with mean winter onset, as populations at high latitudes failed to track early onsets. Variance among offspring was also limited and correlated only weakly with environmental predictability, indicating little scope for bet-hedging. We conclude that constraints may limit the evolution of phenology in a rapidly changing climate.</p>
Data from: Comparative analysis of the shape and size of the middle ear cavity of turtles reveals no correlation with habitat ecology
<p>The middle ear of turtles differs from other reptiles in being separated into two distinct compartments. Several ideas have been proposed as to why the middle ear is compartmentalized in turtles, most suggesting a relationship with underwater hearing. Extant turtle species span fully marine to strictly terrestrial habitats, and ecomorphological hypotheses of turtle hearing predict that this should correlate with variation in the structure of the middle ear due to differences in the fluid properties of water and air. We investigate the shape and size of the air-filled middle ear cavity of 56 extant turtles using 3D data and phylogenetic comparative analysis to test for correlations between habitat preferences and the shape and size of the middle ear cavity. Only weak correlations are found between middle ear cavity size and ecology, with aquatic taxa having proportionally smaller cavity volumes. The middle ear cavity of turtles exhibits high shape diversity among species, but we found no relationship between this shape variation and ecology. Surprisingly, the estimated acoustic transformer ratio, a key functional parameter of impedance-matching ears in vertebrates, also shows no relation to habitat preferences (aquatic/terrestrial) in turtles. We suggest that middle ear cavity shape may be controlled by factors unrelated to hearing, such as the spatial demands of surrounding cranial structures. A review of the fossil record suggests that the modern turtle ear evolved during the Early to Middle Jurassic in stem turtles broadly adapted to freshwater and terrestrial settings. This, combined with our finding that evolutionary transitions between habitats caused only weak evolutionary changes in middle ear structure, suggests that tympanic hearing in turtles evolved as a compromise between subaerial and underwater hearing.</p>
Data for geometric analysis of seed shape diversity in the Cucurbitaceae
<p>Data to complement the article Geometric analysis of seed shape diversity in the Cucurbitaceae </p>
A Cross-Continental Analysis of How Regional Cues Shape Developers' Stack Overflow Contributions
<p>Stack Overflow provides a wide range of knowledge for the software development community. Despite the importance of these platforms, several studies have shown that digital information tends to cluster geographically, which limits knowledge access that is otherwise necessary for innovation.</p> <p>The proposed study highlights the dynamics of users from different geographical backgrounds within Stack Overflow, which entails intra-country interactions, predominant topics of discouse, as well as their communication patterns. Finally, the study highlights that regional behavioural variations stem beyond cultural factors, encompassing technological advancement, entrepreneurial ventures, and workforce composition. </p> <p>This replication package is provided for those interested in further examining our research methodology.</p>
Chanalyzer: a computational geometry approach for the analysis of protein channel shape and dynamics
<p>Dataset of molecular dynamics trajectories described in the "Chanalyzer: a computational geometry approach for the analysis of protein channel shape and dynamics" work.</p> <p>Trajectories of differently functionalized MscL channel forms. </p> <p>The *_xyzr.tar.gz files contain the processed frames in the xyzr format, which is a compatible input for NanoShaper</p> <p>The conf.prm file is the parameter file that has been used for the NanoShaper tool</p>
Fig. 2 in Repeatability Analysis Of Egg Shape In A Wild Tree Sparrow (Passer Montanus) Population: A Sensitive Method For Egg Shape Description
Fig. 2. Data collecting method results in 22 co-ordinates of each eggs
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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.
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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.
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