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81 results for “morphological measurements”
Figure 11. Residual plots from the regression analyses for the four measurements that had low r in Phylogenetic implications of the morphology of the braincase of caecilian amphibians (Gymnophiona)
Figure 11. Residual plots from the regression analyses for the four measurements that had low r-squared values in their respective regression plots. Species circled represent those that deviate from the expected value of each measurement predicted by the regression plot. Data point labels correspond to the first letter of the genus followed by the first three letters of the species. A, residuals from the regression plot of dorsomedial process length against skull length, for which Typhlonectes natans (T.natans), Chthonerpeton indistinctum (C.indistinctum), and Crotaphatrema lamottei (C.lamottei) possess a process that is shorter than predicted; B, residuals from the regression plot of nasal septum length against skull length, for which T. natans and Ch. indistinctum possess a septum that is shorter than predicted; C, residuals of the regression plot of lateral wall length against skull length, for which Scolecomorphus kirkii (S.kirkii), Scolecomorphus vittatus, and Cr. lamottei possess walls that are longer than predicted; and D, residuals of the regression plot of occipital condyle protrusion against skull length, for which Epicrionops bicolor (E.bicolor), Rhinatrema bivittatum (R.bivittatum), Ichthyophis beddomei (I.beddomei), Ichthyophis kohtaoensis, Caudacaecilia asplenia (C.asplenia), and Scolecomorphus vittatus (S.vittatus) possess less protruded condyles than predicted.
FIGURE 3. Hamulus morphological measurements. A in Towards addressing the current state of confusion within the Hexabothriidae Price, 1942 (1908): Callorhynchocotyle Suriano & Incorvaia, 1982 (Monogenea: Hexabothriidae) re-visited, with the preliminary evaluation of novel parameters for measuring haptoral armature of hexabothriids
FIGURE 3. Hamulus morphological measurements. A. Rectangular grid, total length; line a–b, total diameter; line c–d; hook shank length; line e–f, hook point length; line f–g, distal hook point width; line f–h. B. Outer aperture angle (x) from vertex (f) by rays f–g, f–i, Root base angle (y) from vertex (j) by rays j–k, j–l. C. Inner aperture angle (z) from vertex (h) by rays h–g, h– i. Aperture; line g–i, hook shank base width; line e–i, outer root shaft length; line i–m, inner root shaft length; line i–n, root base width; line m–n. Abbreviations as for Fig. 1.
FIGURE 2. Hexabothriid sucker sclerite hook morphological measurements. A in Towards addressing the current state of confusion within the Hexabothriidae Price, 1942 (1908): Callorhynchocotyle Suriano & Incorvaia, 1982 (Monogenea: Hexabothriidae) re-visited, with the preliminary evaluation of novel parameters for measuring haptoral armature of hexabothriids
FIGURE 2. Hexabothriid sucker sclerite hook morphological measurements. A. Hook length; line a–b, hook aperture; line b– c, hook base width; line a–c. B. Hook curve length; line e–f. C. Hook aperture angle (x) from vertex (f) by rays f–b, f–c.
FIGURE 1. Hexabothriid sucker sclerite morphological measurements. A in Towards addressing the current state of confusion within the Hexabothriidae Price, 1942 (1908): Callorhynchocotyle Suriano & Incorvaia, 1982 (Monogenea: Hexabothriidae) re-visited, with the preliminary evaluation of novel parameters for measuring haptoral armature of hexabothriids
FIGURE 1. Hexabothriid sucker sclerite morphological measurements. A. rectangular grid (quad), circumference length (cir), total length; line a–b, total diameter; line c–d. B. Shaft width; line e–f; inner diameter; line f–g. C. Shaft length; line h–i. D. Aperture angle (x) from vertex (f) by rays f–j, f–k. E. Hook-side curve length; line l–m; shaft-side curve length; line n–o. F. Aperture; line j–k. Other abbreviations: gui, guide line.
Data from: Comparing ant morphology measurements from microscope and online AntWeb.org 2D z-stacked images
<p><span>Unprecedented technological advances in digitization and the steadily expanding open-access digital repositories are yielding new opportunities to quickly and efficiently measure morphological traits without transportation and advanced/expensive microscope machinery. A prime example is the AntWeb.org database, which allows researchers from all over the world to study taxonomic, ecological, or evolutionary questions on the same ant specimens with ease. However, the reproducibility and reliability of morphometric data deduced from AntWeb compared to traditional microscope measurements has not yet been tested.</span></p> <p><span>Here, we compared 12 morphological traits of 46 <em>Temnothorax</em> ant specimens measured either directly by stereomicroscope on physical specimens or via the widely used open access software tpsDig utilizing AntWeb digital images. We employed a complex statistical framework to test several aspects of reproducibility and reliability between the methods. We estimated (i) the agreement between the measurement methods and (ii) the trait value dependence of the agreement, then (iii) compared the coefficients of variation produced by the different methods, and finally, (iv) tested for systematic bias between the methods in a mixed modelling-based statistical framework.</span></p> <p><span>The stereomicroscope measurements were extremely precise. Our comparisons showed that agreement between the two methods was exceptionally high, without trait value dependence. Further, the coefficients of variation did not differ between the methods. However, we found systematic bias in eight traits: apart from one trait where software measurements overestimated the microscopic measurements, the former underestimated the latter.</span></p> <p><span>Our results shed light on the fact that relying solely on the level of agreement between methods can be highly misleading. In our case, even though the software measurements predicted microscope measurements very well, replacing traditional microscope measurements with software measurements, and especially mixing data collected by the different methods, might result in erroneous conclusions. We provide guidance on the best way to utilize virtual specimens (2D z-stacked images) as a source of morphometric data, emphasizing the method's limitations in certain fields and applications.</span></p>
Figure 2. Skull with measurements labelled. A, dorsal view. B, ventral view. C, lateral view. D in Cranial morphology of the California vole (Microtus californicus, Cricetidae) in a contact zone
Figure 2. Skull with measurements labelled. A, dorsal view. B, ventral view. C, lateral view. D, mandible. HCB, height of cranium at bullae; IOC, interorbital constriction; IFL, length of incisive foramen; IPL, interparietal length; IPW, interparietal width; MAL, upper molar alveolus; MAN, length of mandible; MAW, mastoid width; NAL, nasal length; ONL, occipital-nasal length; PAL, shelf of bony palate; ZYB, zygomatic breadth. Details of each measurement are provided in the text.
, phillipsi holotype. the M of of Measurements Measurements. . n purposes size sample comparative and , range for , SD shown ± 0 are as presented Lanka Sri and Measurements India in authors . occurring Lanka different Sri, Idulgashinna Miniopterus of of assortment from species an . by nov other. sp and specimens phillipsi species other . M new the of ) the while mm of (, TK measurements individuals by taken other were Cranial and types . 4. ABLE paratypes nov. T sp in DNA barcoding and morphological analyses reveal a cryptic species of Miniopterus from India and Sri Lanka
, phillipsi holotype. the M of of Measurements Measurements. . n purposes size sample comparative and , range for , SD shown ± 0 are as presented Lanka Sri and Measurements India in authors . occurring Lanka different Sri, Idulgashinna Miniopterus of of assortment from species an . by nov other. sp and specimens phillipsi species other . M new the of ) the while mm of (, TK measurements individuals by taken other were Cranial and types . 4. ABLE paratypes nov. T sp
Data from: Morphological measurements and mercury levels of Saltmarsh Sparrows sampled across their breeding range
<p><span>Malaria parasites (genus <em>Plasmodium</em>) are important agents of infectious disease in birds and multiple factors including warming temperatures and environmental contamination may act to increase their geographic and host ranges. </span>Here, we examined the role of geographical variation and environmental mercury exposure in malaria parasite infection dynamics in an imperiled songbird species with high mercury exposition, the Saltmarsh Sparrow (<em>Ammospiza caudacutus</em>). Using PCR methods, we <span>screened 280 Saltmarsh Sparrows from across their breeding range for malaria parasite infection. </span>We detected malaria parasites in 17% of sampled birds and a total of six <em>Plasmodium</em> lineages. <span>Prevalence of infection and diversity of parasite lineages varied across the breeding range of the Saltmarsh Sparrow and increased at more northern latitudes. Although mercury is a known immunosuppressant and has been documented to alter an individual's susceptibility to pathogens, we did not find a significant difference in blood mercury levels between infected and not infected birds, perhaps due to sampling methods and/or small sample sizes. As a specialist of coastal wetlands, the Saltmarsh Sparrow is an excellent indicator species for ecological health, and the patterns of malaria parasite infection with host distribution and mercury suggest that birds at northern latitudes are at greater risk of disease and should be priorities for conservation, habitat, and pathogen monitoring. </span></p>
Fig. 2 in Towards a standardisation of morphological measurements in the phylum Kinorhyncha
Fig. 2. Schematic representation of adjacent and isolated segments in the Echinoderidae. A: Segment nesting due to the natural biological shape of Echinoderidae. B: Schematic representation of the overlap of the tergal plates. Abbreviations: MD, middorsal; ML, midlateral; MV, midventral; colours distinguish adjacent segments. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
Fig. 1 in Towards a standardisation of morphological measurements in the phylum Kinorhyncha
Fig. 1. Schematic line art representation of a standardised echinoderid kinorhynch morphology. A: Ventral view showing the most common trunk measurements; B: lateral view showing the three possible lines to take the morphological measurements (note how the total trunk length may vary depending on the selected line due to the natural curved shape of the trunk). Abbreviations: MD, middorsal; ML, midlateral; MSW, maximum sternal width; MV, midventral; SW, standard sternal width; TL, total trunk length.
Measuring the Morphological Characteristics of Thoracolumbar Fascia in Low Back Pain
ClinicalTrials.gov study NCT05366972. IPD Sharing: Not stated. Countries: 1. Publications: 1.
The Evaluation of Medial Longitudinal Arch Morphology in Children With Spastic Diplegic Cerebral Palsy by Arch Height Index Measurement Method
ClinicalTrials.gov study NCT05025007. IPD Sharing: NO. Countries: 1. Publications: 3.
Morphological measurements in a coastal Ecuadorian avifauna
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Data from: Comparing ant morphology measurements from microscope and online AntWeb.org 2D z-stacked images
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Data from: Measuring the magnitude of morphological integration: the effect of differences in morphometric representations and the inclusion of size
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Data from: Quantifying the effect of gape and morphology on bite force: biomechanical modeling and in vivo measurements in bats
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External morphology measurements of several species of the plethodontid genus Aneides
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Data from: Morphological measurements and mercury levels of Saltmarsh Sparrows sampled across their breeding range
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Morphological measurements of six cave and nine surface Asellus aquaticus populations
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Data from: In situ measurements of animal morphological features; a non-invasive method
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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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.