Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 376 for “"Morphometric"”.
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Morphometric Otolith Analysis
Abstract Fish otoliths have long played an important role in sustainable �sheries management. Stock assessment models currently used rely on species speci�c age pro�les obtained from the seasonal patterns of growth marks that otoliths exhibit. We compare methods widely used in �sheries science …
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Morphometric study of long bones histology
… the degree of inter- and intra-skeletal histomorphometric variation in both the humerus and femur at three different cross-sectional sampling sites as well as the circumferential variation within a sampling site across two human populations (Scottish and Thai) and two animal species (Porcine …
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Morphometric analysis of ears in two families of pinnipeds
… interaural dimensions and ossicular chain morphometrics. Ossicular weights and densities were measured conventionally. Results strongly support a canalcentric system for pinniped sound reception and localization. Further, true seals show adaptations for aquatic high frequency specialization.
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A morphometric study of cranial shape in the Hominoidea
… in the light of the results of multivariate morphometric studies of cranial form undertaken by other workers. From these studies it is concluded that: a) the results obtained by studies employing landmark dependent and data with reduced landmark dependence may differ to some degreea nd that …
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Geometric morphometric analysis of skeletal shape variation across the pleuronectiformes
1 PDF file (vii, 94 pages)
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Image analysis in the morphological and morphometric study of teeth
… of a new methodology for the morphological and morphometric study of fossilized human teeth, and therefore strives to provide a contribution to the reconstruction of human evolutionary history that proposes to extend to the different species of hominid fossils. Standardized investigative …
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Morphometric approaches to systematics and microevolution: Applications from paleozoic bryozoa
… revised taxonomic procedures, multivariate morphometric methods, and advances in microcomputer technology allows for research of this nature.
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Management practices, morphometric body measurements and diseases of local Zambian goats
The management practices, morphometric body measurements and disease profiles of local Zambian goats were studied with the main objectives of assessing the existing production system. The study was also aimed at gaining better understanding of: 1)socio-economic characteristics of the goat keepers …
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Electrophoretic, Morphometric, and Meristic Comparisons of Walleye Broodstock in South Dakota
Electrophoretic and morphological variability among walleyes collected from three upper Missouri River tributaries and a glacial lake in South Dakota was investigated, and an upper Mississippi River stock was electrophoretically compared to the South Dakota stocks. Allele frequencies of two (MDH-3, …
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Morphological and morphometric analysis of Nekemias arborea and Ampelopsis aconitifolia (Vitaceae)
1 PDF file (vi, 85 pages)
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Morphometric Approaches to Analysis of Microevolution: Morphologic Variation in Paleozoic Bryozoa
Temporal variation is recognized among stratigraphically separated populations. Colonies become more gracile through time, but populations are not ecotypes tracking favorable environmental conditions. Characters describing zooidal living chambers contribute more to the discrimination of populations …
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Morphometric and molecular analysis of two distinct forms of Pseudocrossidium crinitum
… own in arid areas. In this paper we analyse 16 morphometric variables and chloroplast and nuclear DNA molecular information to determine whether Pseudocrossidium crinitum should be separated into two species based on morphological differences. We use ANOVA, Principal components analysis and …
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Geometric Morphometric and Volumetric Analysis of Contributing Factors to Traumatic Brain Injury
It is estimated that 1.7 million people per year sustain a traumatic brain injury (TBI). This represents a 21% increase from the 1.4 million TBI-related injuries reported in 2004. This increase has been partly attributed to the growing population of children and elderly. Motor vehicle crashes …
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Comparative morphometric analysis of the Devil Peak Shasta ground sloth, Nothrotheriops shastensis
The remains of the Devil Peak Shasta Ground Sloth ( Nothrotheriops shastensis) is one of the most complete fossils of this species ever discovered. The study's objective is to use the dimensions of the Devil Peak sloth and Aden Crater sloth (the only other complete skeleton of this species known) …
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Application of Morphometric Relationships to Active Flow Networks Within the Mammoth Cave Watershed
… Groundwater Basin of the Mammoth Cave Watershed. Morphometric analysis of mapped active base-flow, stream-drainage density within the Turnhole Bend Groundwater Basin resulted in values ranging from 0.24 km/km2 to 1.13 km/km2. A nearby, climatologically similar, nonkarst surface drainage system …
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The relationship between masticatory stress and prognathism : a finite element and morphometric study
Mechanical forces, such as mastication, influence morphological characteristics of the cranium. With varying degrees of prognathism found within and between populations, the ability to accommodate masticatory stress may vary, and this will have profound effects on final craniofacial form. The …
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Shape variability and sexual dimorphism of the chin: a 3D geometric morphometric analysis
Εισαγωγή: Βάσει των εξελικτικών θεωριών, ο πώγωνας αποτελεί ένα ανατομικό στοιχείο μοναδικό στον άνθρωπο, με αξιοσημείωτη προσαρμοστικότητα στις ιδιαιτερότητες που επέβαλαν οι συνθήκες και οι ανάγκες κάθε σταδίου εξέλιξης από την εμφάνιση του ανθρώπου στη Γη. Το ενδιαφέρον των επιστημόνων έχει …
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Morphometric changes in the prepubertal rat thyroid gland following acute exposure to PCBs
Female rats subjected to a short-term immature rodent bioassay, developed to study the effects of polychlorinated biphenyls (PCBs), were further used to examine the effects of PCBs on thyroid glands through examination of serum thyroxine (T$\sb4$) and morphometry.
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Morphometric discrimination among Betula nana, Betula pubescens and their hybrids using the shapeR package
… user to extract outlines and several traditional morphometric parameters from image samples and to conduct statistical testing. Using the ShapeR package in conjunction with other R packages used for statistical analysis, it was possible to discriminate between both species and their hybrids with …
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