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Showing 1 to 20 of 147 for “"Morphometrics"”.
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Ancestry determination using geometric morphometrics
Ancestry identification is an important aspect in forensic anthropological investigations concerning the biological and social identity of unidentified human remains. Traditionally, ancestry is usually assessed by the visual examination of the shape and form of the features of the skull and/or …
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Cranial Sexual Dimorphism in Hispanics Using Geometric Morphometrics
Hispanics comprise the second largest population group in the US. Further, 63% of U.S. Hispanics are of Mexican origin with 37% foreign born (Motel and Patten, 2012). Sex estimation is an important component of the forensic anthropological profile and is considered population specific in that human …
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Geographical Distribution and Morphometrics of South Dakota Turtles
Relatively little information has been published on South Dakota turtles compared to the neighboring Midwest states. This study was conducted to compile literature relevant to the species of turtles that occur in the state; develop proper protocols for field collection, morphological measurement, …
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Comparative Morphometrics of the Sacral Vertebra in <em>Aneides</em> (Caudata: Plethodontidae).
… taxonomic levels remains inconclusive. Linear morphometrics and dorsal Procrustes landmarks were the most successful metrics to identify known taxa. Two unidentified fossil salamander sacral vertebrae from Oregon Caves National Monument are examined with the same techniques and are tentatively …
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Understanding the evolution of cymothoid isopod parasites using comparative genomics and geometric morphometrics
One of the single most extraordinary examples of host-parasite co-evolution is shownby the isopod family Cymothoidae, of which all species are obligate parasites of fishes,including many commercially important fish species. Cymothoids are one of the mostdiverse isopod groups, with 400 species …
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Geometric morphometrics for 3D dense surface correspondence: population comparisons of shoulder bone morphology
… and prognosis by the clinician. Geometric morphometrics (GM) is one of the fields that help to provide such population comparisons. In medical imaging and related disciplines, GM is commonly done using annotated landmarks or distances measured from 3D surfaces (consisting of triangular …
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A comprehensive analysis of long bone curvature in Neanderthals and modern humans using 3D morphometrics
… and within populations were made using geometric morphometrics (3D landmarks) and standard multivariate methods. Comparative material involved all available Neanderthal and Upper Palaeolithic modem human femora, ulnae and radii, archaeological (Mesolithic, Neolithic, Medieval) and recent human …
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Identifying Myotis Species Using Geometric Morphometrics and its Implications for the Fossil Record and Conservation
… were analyzed using landmark-based geometric morphometrics. The species could be distinguished with a high degree of accuracy. Evidence was found of a phylogenetic signal in the morphology of the Neotropical and Nearctic <em>Myotis </em>sub-clades. There is also evidence of convergence in the …
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Characterizing Patterns Of Round Goby (Neogobius Melanostomus) Distribution Using Morphometrics, Occupancy Modeling, And Population Genetics
In addition to anthropogenic mechanisms of dispersal, establishment of round goby, Neogobius melanostomus, in the Laurentian Great Lakes has generally benefitted from continuous connections among the lakes and accessible shorelines. This dissertation (1) examined the effects of distance in …
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Phylogenomics and Geometric Morphometrics Define Species Flocks of Snowtrout (Teleostei: Schizothorax) in the Central Himalayas
<p>Schizothorax (Snowtrout) is a genus of medium-sized minnows (Cypriniformes) inhabiting glacier-fed streams, rivers, and lakes in the Himalayas. There are more than 30 species of Schizothorax across the region. The speciation and diversity of the Snowtrout in the vast hinterlands of the Himalayan …
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Establishing Image-Based Profiling Methods for Single-Cell Transcriptomics and Morphometrics in the Cephalochordate Amphioxus
The cephalochordate amphioxus occupies a key phylogenetic position for comparative studies elucidating the origins of the chordate body plan and the emergence of vertebrate novelties during evolution. However, as a model system, the amphioxus is still challenging to culture in the lab, and …
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Comparative analysis of wild and long term captive bred Partula snails using morphometrics and population data
Partula snails are one genus of the Partulidae family of air breathing, land snails that are endemic to the Pacific Islands. Over 100 partulid species are recognised with over half these species known to have existed and endemic to the Society Islands (within the Pacific islands). It is thought …
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Assessing competition during the transition from jawless to jawed vertebrates with morphometrics, ecomorphology, and comparative biomechanics
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Characterization of the facial phenotype associated with fetal alcohol syndrome using stereo-photogrammetry and geometric morphometrics
Fetal Alcohol Syndrome (FAS) is a clinical condition caused by excessive pre-natal alcohol exposure and is regarded as a leading identifiable and preventable cause of mental retardation in the Western world. The highest prevalence of FAS was reported in the wine-growing regions of South Africa but …
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Assessing the accuracy of the zygoma for estimating ancestry using geometric morphometrics in a South African sample
The large number of unidentified, decomposed and skeletonised remains found in South Africa (SA) necessitates relevant and reliable methods to assist in victim identification. Ancestry estimation from unknown skeletal remains is essential when reconstructing a demographic profile of a missing …
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Morphometrics, molecular ecology and multivariate environmental niche define the evolutionary history of the Western Rattlesnake (Crotalus viridis) complex
Species are the currency of biodiversity and an accurate recognition of their status is a scientific necessity, particularly given the onset of the Anthropocene (the most recent biodiversity crisis). Yet, concept-based species approaches are contentious whereas those more deterministic work against …
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Osteology, Morphometrics, and Phylogenetic Systematics of the ‘Booneville Dinosaur’ (Ornithopoda: Hadrosauridae) From the Early–Middle Campanian Coffee Formation of Northeastern Mississippi
<p>The non-avian dinosaur fossil record of Mississippi includes members of the clades Hadrosauroidea, Nodosauridae, Tyrannosauroidea, Ornithomimidae, Dromaeosauridae, and Ceratopsia. These members are represented only by non-articulated usually isolated elements, deposited in the marine and …
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On The Cranial Osteology of <em>Eremiascincus</em> and Its Use For Identification.
… allometry in <em>Eremiascincus</em> using linear morphometrics, 4) using cranial morphometrics of skinks to deduce their phylogeny, and 5) using geometric morphometrics to distinguish between individual elements of <em>Eremiascincus</em> and <em>Ctenotus</em>. Although linear morphometrics is …
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Cranial form evolution and functional adaptations to diet among papionins : a comparative study combining quantitative genetics, geometric morphometrics, and finite element analysis
… using 3D finite element models and geometric morphometrics. Large scale deformations and cranial form are assessed using landmarks distributed over the cranium, and local strain distributions are assessed visually. Lastly, the association between cranial form, biomechanical parameters and diet …
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