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Influence of the mode of macrofauna-mediated bioturbation on the vertical distribution of living benthic foraminifera: First insight from axial tomodensitometry ArchiMer
Bouchet, Vincent; Sauriau, Pierre-guy; Debenay, J.p.; Mermillod-blondin, F; Schmidt, S; Amiard, J.c.; Dupas, B.
We investigated the influence of bioturbation by macrofauna on the vertical distribution of living (stained) benthic foraminifera in marine intertidal sediments. We investigated the links between macrofaunal bioturbation and foraminiferal distribution, by sampling from stations situated on a gradient of perturbation by oyster-farming, which has a major effect on benthic faunal assemblages. Sediment cores were collected on the French Atlantic coast, from three intertidal stations: an oyster farm, an area without oysters but affected by oyster biodeposits, and a control station. Axial tomodensitometry (CT-scan) was used for three-dimensional visualization and two-dimensional analysis of the cores. Biogenic structure volumes were quantified and compared...
Tipo: Text Palavras-chave: Macrofauna; Living foraminifera; Interspecific interaction; CT scan; Bioturbating modes; Biogenic structures.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6146.pdf
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The Effects of Age and Sex on Brain Volume International Journal of Morphology
Bayat,Parvin-Dokht; Ghanbari,Ali; Moradi,Mojtaba; Raoofi,Amir.
Age is associated with substantial macrostructural brain changes. While some recent CT scan studies have reported larger age affects in men than women, others find no sex differences, as brain morphometry is a potentially important tool in diagnosis and monitoring of age-related neurological diseases. A study was conducted on 147 Arakian healthy aged participants in the Department of Radiology, Valie asr Hospital, Arak city. Gray matter (GM), white matter (WM) and CSF was evaluated based on cranial CT scan images. Both males and females subjects were divided into four age groups. In this study, the subjects were 51.7% (76) male and 48.3% (71) female. Frequency of groups showed that the common types were in the 4th group of ages (65.1­80 years) with 44%....
Tipo: Journal article Palavras-chave: Ageing; CT scan; Morphometry.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000400056
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Triadobatrachus massinoti, the earliest known lissamphibian (Vertebrata: Tetrapoda) re-examined by μCT scan, and the evolution of trunk length in batrachians Naturalis
Ascarrunz, E.; Rage , J.-C.; Legreneur, P.; Laurin, M..
Triadobatrachus massinoti is a batrachian known from a single fossil from the Early Triassic of Madagascar that presents a combination of apomorphic salientian and plesiomorphic batrachian characters. Herein we offer a revised description of the specimen based on X-ray micro-tomography data. We report previously unknown caudal vertebrae, possible mentomeckelians, and hidden parts of other structures. We also confirm the presence of a ventrolateral ledge on the opisthotic, and we rectify some previous interpretations. There are no cervical ribs and the jaw may have had an angular. The presacral region is composed of 15 vertebrae with a unique atlas-axis complex instead of 14 vertebrae with a bipartite atlas. The configuration of the pelvic girdle is not...
Tipo: Article / Letter to the editor Palavras-chave: Anura; Caudopelvic apparatus; CT scan; Salientia; Triassic; Trunk evolution; 42.82.
Ano: 2016 URL: http://www.repository.naturalis.nl/record/610011
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