نتایج جستجو برای: geometric morphometric
تعداد نتایج: 106641 فیلتر نتایج به سال:
The mimetic juveniles of a number of carangid fish species resemble plant parts floating near the water surface, such as leaves, seeds and other plant debris. The present study is the first to verify the morphological similarities and ecomorphological relationships between three carangids (Oligoplites saurus, Oligoplites palometa and Trachinotus falcatus) and their associated plant models. Beha...
Taxonomic and phylogenetic analyses of great apes and humans have identified two potential areas of conflict between molecular and morphological data: phylogenetic relationships among living species and differentiation of great ape subspecies. Here we address these problems by using morphometric data. Three-dimensional landmark data from the hominoid temporal bone effectively quantify the shape...
The analysis of morphometric data of the vasculature of any organ requires appropriate visualization methods to be applied due to the vast number of vessels that can be present in such data. In addition, the geometric properties of vessel segments, i.e. being rather long and thin, can make it difficult to judge on relative position, despite depth cues such as proper lighting and shading of the ...
Coraebus hastanus Gory & Laporte de Castelnau, 1839 is easily distinguished from the other species of the genus Coraebus Gory & Laporte de Castelnau, 1839. It was divided into three subspecies, but the main diagnostic characters were variable. In order to understand the morphological variability and taxonomy of subspecies of C. hastanus, shape of elytral apex, lateral margin of elytra and the a...
Morphometric approaches can be combined with 2D or 3D imaging to quantitatively evaluate craniofacial medical conditions depicted in material culture and to learn more about the culture being studied. A terra-cotta figurine (circa 500 A.D.) from the Tolteca culture of Mexico has previously been qualitatively “diagnosed” with Down syndrome (DS) based on the presence or absence of facial features...
Increasingly, data on shape are analysed in combination with molecular genetic or ecological information, so that tools for geometric morphometric analysis are required. Morphometric studies most often use the arrangements of morphological landmarks as the data source and extract shape information from them by Procrustes superimposition. The MorphoJ software combines this approach with a wide r...
Geometric morphometric assessment of the fossil bears of Namur, Belgium: Allometry and ecomorphology
The Namur area in Belgium is useful to study brown (Ursus arctos) and cave bears spelaeus) as the assemblage contains little temporal no geographical variation. Here, we aim assess ontogenetic allometry within bears, well ecomorphological differences between adult (n = 9), 5) juvenile 3). Landmarks for 3D digitization of mandible were chosen based on taphonomical damage specimens. Extant extinc...
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