Morphometric analysis of nectaries and their potential use in the taxonomy of the Jovibarba heuffelii complex (Crassulaceae)

The aim of this study was to quantify the morphological variation of nectaries among 14 populations of Jovibarba heuffelii based on multivariate statistics, and to establish whether nectaries possess taxonomic significance for differentiating taxa within the J. heuffelii complex. To this end, we measured the width of the nectary, its height, the angle between the carpels and nectary, the shape of the nectary and the distance between nectaries were measured and analyzed. Descriptive statistics, the Tukey HSD (honest significant difference) of homogenous groups for the unequal N post-hoc test, canonical discriminant analysis (CDA) and multiple correspondence analysis (MCA) were used. Morphometric analysis showed that the quantitative and semiquantitative characteristics of nectaries in the J. heuffelii complex are highly morphologically variable, both within and between populations, and that they are unreliable as taxonomic characters for taxon differentiation within the J. heuffelii complex.

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The morphological variation of Myzus persicae (Hemiptera: Aphididae) from peach and tobacco in Serbia and Montenegro

Archives of Biological Sciences ◽

10.2298/abs1003767v ◽

2010 ◽

Vol 62 (3) ◽

pp. 767-774 ◽

Cited By ~ 3

Author(s):

Andja Vucetic ◽

Olivera Petrovic-Obradovic ◽

Lj.Z. Stanisavljevic

Keyword(s):

Discriminant Analysis ◽

Morphometric Analysis ◽

Morphological Variation ◽

Myzus Persicae ◽

Host Plants ◽

Segment Length ◽

Serbia And Montenegro

Multivariate morphometric analysis was used to compare nine characteristics of 47 populations of Myzus persicae (Sulzer) originating from two host-plants, peach and tobacco, from 13 localities in 2004 and 34 localities in 2005, in Serbia and Montenegro. Multivariant discriminant analysis showed there to be a distinct discrimination between the populations from the peach and tobacco host-plants. The most important discrimination characteristics are the ultimate rostral segment length and processes terminalis length, which are greater in the aphids from tobacco than in those from peach. This is the first indication that in this part of Europe there are two subspecies: M. persicae (Sulzer) and M. persicae nicotianae Blackman. .

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Morphometric analysis of some populations of lymnocardiid species (Mollusca: Bivalvia) from Razelm Lake Complex (Romania)

Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa” ◽

10.2478/v10191-010-0002-y ◽

2010 ◽

Vol 53 (1) ◽

pp. 13-19 ◽

Cited By ~ 3

Author(s):

Oana Popa ◽

Elena Iorgu ◽

Beatrice Kelemen ◽

Dumitru Murariu ◽

Luis Popa

Keyword(s):

Multivariate Analysis ◽

Discriminant Analysis ◽

Analysis Of Variance ◽

Morphometric Analysis ◽

Growth Pattern ◽

Curve Analysis ◽

Multivariate Analysis Of Variance ◽

Geographical Variability ◽

Significant Difference ◽

Morphological Variables

Morphometric analysis of some populations of lymnocardiid species (Mollusca: Bivalvia) from Razelm Lake Complex (Romania) In this paper we report the morphometric analysis of some populations of Lymnocardiid species from the lakes Razelm and Goloviţa. We used three measurements ratios to perform a discriminant analysis and a multivariate analysis of variance (MANOVA), in order to compare the species Hypanis colorata vs. Hypanis angusticostata in the two lakes, H. colorata in Razelm vs. Goloviţa, and H. angusticostata in Razelm vs. Goloviţa. From this analysis we concluded that the multivariate means of the morphological variables used in this study were highly significantly different (p=3.2e-05) between the two species. Concerning the geographical variability, in both species, the analysis showed no significant difference between the populations in the two investigated lakes. We also determined from a fitting curve analysis, that the growth pattern of both species shows length-height isometry and width-length and width-height negative allometry.

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Morphological variation in leaf domatia enables coexistence of antagonistic mites in Cinnamomum camphora

Canadian Journal of Botany ◽

10.1139/b04-152 ◽

2005 ◽

Vol 83 (1) ◽

pp. 93-101 ◽

Cited By ~ 14

Author(s):

Sachiko Nishida ◽

Akiyo Naiki ◽

Takayoshi Nishida

Keyword(s):

Discriminant Analysis ◽

Morphological Variation ◽

Canonical Discriminant Analysis ◽

Cinnamomum Camphora ◽

Ecological Interactions ◽

Natural Habitats ◽

Different Types ◽

Egg Shells ◽

Plant Herbivore

We examined variation in Cinnamomum camphora (L.) J. Presl (Lauraceae) leaf domatium morphology with respect to domatium inhabitants in the tree's natural habitats. Canonical discriminant analysis revealed that domatium morphology could be classified into four different types: pouch type, domatia with a narrow (about 0.06 mm) pubescent opening; pubescent pit type, domatia with a wider (about 0.21 mm) pubescent opening; glabrous pit type, domatia similar to the pubescent pit type but with a glabrous opening; and dish type, domatia with a wide (about 0.26 mm) glabrous opening. These four domatium types were found in different positions on a leaf, and domatia with narrower openings tended to occur in or near the position between the midrib and basal secondary veins. The four domatium types were associated, respectively, with herbivorous Eriophyidae mites and herbivorous or fungivorous Tarsonemidae mites; with carnivorous Stigmaeidae mites; with Stigmaeidae mites and egg shells or excuviae of carnivorous Phytoseiidae mites; and with egg shells or excuviae of Phytoseiidae mites. These results suggest that different mites use different domatia, even on the same C. camphora leaf. This conclusion may explain the different results in previous reports about domatium fauna. It suggests that ecological interactions within the plantherbivorecarnivore system are complicated.Key words: carnivorous mite, Cinnamomum camphora, domatia, herbivorous mite, inhabitant, morphology.

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Comparative study of anthropometric measurement and body composition between soccer players from different competitive levels, elite and sub-elite

Pedagogics psychology medical-biological problems of physical training and sports ◽

10.15561/18189172.2019.0602 ◽

2019 ◽

Vol 23 (6) ◽

pp. 282-287

Author(s):

B. Masanovic ◽

Z. Milosevic ◽

D. Bjelica

Keyword(s):

Body Mass Index ◽

Body Composition ◽

Descriptive Statistics ◽

Soccer Players ◽

Anthropometric Measurement ◽

Significant Difference ◽

Anthropometric Characteristics ◽

Bone Content ◽

Post Hoc ◽

Sedentary Subjects

Background and Study Aim: The purpose of this study was to describe anthropometric characteristics and body composition of soccer players from different competitive levels, elite and sub-elite as well as to make comparison between them. Material and Methods: Seventy-seven subjects were enrolled in this study, divided into three groups: twenty-six elite soccer players, twenty sub-elite soccer players and thirty-one healthy sedentary subjects. All subjects were assessed for anthropometric measurements required for the calculation of body composition variables using standardized procedures which were recommended by previous studies. Data was analyzed by using SPSS and the descriptive statistics were expressed as a mean (SD) for each variable, while the ANOVA and the LSD Post Hoc tests were carried out to discover effects of each type of sport. Results: The results showed that a significant difference was found in weight, body mass index, bone content and body fat, while a significant difference was not found in two remaining variables, height and muscle mass. Conclusions: Therefore, these findings may give coaches from the region better working knowledge and thus provide knowledges for soccer experts which will help them to select talented players as best as possible.

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Craniometric Patterning within Ancient Peru

Latin American Antiquity ◽

10.1017/s104566350000777x ◽

2008 ◽

Vol 19 (2) ◽

pp. 158-166 ◽

Cited By ~ 8

Author(s):

Ann H. Ross ◽

Douglas H. Ubelaker ◽

Sonia Guillén

Keyword(s):

Discriminant Analysis ◽

South America ◽

Morphological Variation ◽

Canonical Discriminant Analysis ◽

Skeletal Remains ◽

Biological Distance ◽

Human Skeletal Remains ◽

Group Variation ◽

History Of ◽

Rich History

Numerous studies have used the Howells Peruvian sample from the province of Yauyos as the morphological representative for South America. Although Peru has a rich history of investigations of human skeletal remains, biological distance studies based on craniometrics are limited to nonexistent. This study examines the morphological variation found in Peru using the Howells sample and three additional coastal (Makatampu and Ancón) and highland (Cajamarca) samples. The between-group variation and the degree of among-group differentiation were tested using a canonical discriminant analysis and Mahalanobis D², respectively. All groups are significantly different from the Yauyos sample and results indicate a closer morphological affinity between coastal groups and the two highland groups.

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Analysis of Course Type, Gender, and Personal Incentives to Exercise

Perceptual and Motor Skills ◽

10.2466/pms.1994.78.1.155 ◽

1994 ◽

Vol 78 (1) ◽

pp. 155-159 ◽

Cited By ~ 17

Author(s):

Mel E. Finkenberg ◽

James M. Dinucci ◽

Sandra L. McCune ◽

E. Donice McCune

Keyword(s):

Physical Activity ◽

Multivariate Analysis ◽

Discriminant Analysis ◽

Canonical Discriminant Analysis ◽

Men And Women ◽

Independent Variables ◽

Significant Difference ◽

Dependent Variables ◽

And Gender ◽

Main Effects

206 women and 88 men enrolled in classes requiring different amounts of physical activity were administered the Personal Incentives for Exercise Questionnaire A two-way multivariate analysis of variance, with course type and gender as the categorical independent variables and 10 subscale scores representing incentives to exercise as the multivariate dependent variables, was completed. Canonical discriminant analysis was used to identify which of the incentives is most useful in discriminating among participants in active and less active classes or between men and women. For main effects, analysis indicated an over-all significant difference for both course type and gender. Men scored higher than women on activity and on competition, for example, while women scored higher on appearance and weight management.

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Profitability of Cassava Processing: A Case Study of Otukpo Lga, Benue State, Nigeria

Sustainable Food Production ◽

10.18052/www.scipress.com/sfp.6.12 ◽

2019 ◽

Vol 6 ◽

pp. 12-23

Author(s):

Dorothy Ani ◽

Hycainth Ojila ◽

Orefi Abu

Keyword(s):

Road Network ◽

Descriptive Statistics ◽

Age Group ◽

Processing Technologies ◽

Profitability Analysis ◽

Significant Difference ◽

Post Hoc ◽

Cost Of Transportation ◽

Structured Questionnaire

The study investigated the economics of cassava processing in Otukpo Local Government Area, Benue State, Nigeria. Data were collected using well-structured questionnaire administered to 60 cassava processors. Data collected were analyzed using descriptive statistics, Profit function, independent sample t-test and Analysis of Variance (ANOVA). Results showed that majority of the processors were within the age group of 31–40 years with mean year of experience of 34 years. They were mostly women with an average of 8 persons per household. Traditional technologies mostly were employed by the cassava processors. The profitability analysis showed that cassava processing into garri (fried cassava granules), chips and fufu/akpu (cassava dough) are profitable, (t =23.55, 11.95, 12.37: P≤ 0.01). Moreover, the result of the ANOVA showed that there was a significant difference (F=44.48:P≤0.01) in the profit level of cassava processed into garri, chips and fufu/akpu. The result of the post-hoc of ANOVA shows that among the three cassava products studied, garri had the highest profit. The cassava processors encountered many set-backs like poor equipment, high cost of transportation, inadequate capital and poor road network even though processing is a viable and profitable venture. Modern processing technologies should be developed and disseminated to processors while adequate infrastructural facilities and credits should also be provided.

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Development of electrospun-based polyetherimide fibers and diameter analysis for potential use in dental materials

Brazilian Dental Science ◽

10.14295/bds.2021.v24i2.2107 ◽

2021 ◽

Vol 24 (2) ◽

pp. 5

Author(s):

Elisa Camargo Kukulka ◽

Tabata Prado Sato ◽

Karen Cristina Archangelo ◽

Jéssica Dias Santos ◽

Joyce Rodrigues De Souza ◽

...

Keyword(s):

Statistical Analysis ◽

Dental Materials ◽

Electrospun Fibers ◽

Diameter Measurement ◽

Sem Images ◽

Electrospinning Technique ◽

Significant Difference ◽

Processing Program ◽

Post Hoc ◽

Potential Use

Objetives: this study aimed to fabricate electrospun-based polyetherimide (PEI) fibers, under controlled parameters, and to perform a diameter analysis for potential mechanical improvement of dental materials. Material and Methods: PEI pallets (0.75 g) were dissolved in 2 mL of chloroform and then processed by electrospinning, under a flow rate of 1mLh1 , three different electrical voltages (10kV, 15kV and 20kV) and three distances (10 cm, 15 cm and 18 cm) between the needle tip and collector. These parameter combinations resulted in nine experimental groups that were analyzed using scanning electron microscopy (SEM) and image processing program for diameter measurement. Statistical analysis was performed using two-way ANOVA with post-hoc Tukey (5% significance). Results: from SEM images it was possible to observe formation of solid, misaligned and flawless defect-free fibers. And from the statistical analysis, distance (p = 0,0026) and the electric tension (p = 0,0012) showed a significant difference, but not for interaction between then (p = 0,4486). Conclusion: thus, it can be concluded that there is a possibility of the morphology control of PEI electrospun fibers, such as diameter, that can be used for a variety of applications such as incorporation in dental materials in order to improve its properties. Keywords Electrospinning technique; Fibers; Polyetherimide; Polymer.

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Application of morphometric study to discriminate Pteridium aquilinum (L.) Kuhn subsp. pinetorum (C. N. Page & R. R. Mill 1995) J. A. Thomson in Poland

Biodiversity Research and Conservation ◽

10.2478/biorc-2019-0015 ◽

2019 ◽

Vol 56 (1) ◽

pp. 1-12

Author(s):

Elżbieta Zenkteler ◽

Oskar Nowak

Keyword(s):

Discriminant Analysis ◽

Morphometric Analysis ◽

Canonical Discriminant Analysis ◽

Pteridium Aquilinum ◽

Morphometric Study ◽

Quantitative Characters ◽

Ultimate Segment ◽

Shape And Size

Abstract Pteridium aquilinum subsp. pinetorum is one of two morphologically distinct taxa of the genus Pteridium identified in Poland. In order to confirm their distinctively recognizable morphology, nine features defining each of these taxa were subjected to a morphometric analysis. These features, including taxonomic characters of vegetative structures, were measured or counted for their most comprehensive descriptions. The measurements were also expressed as ratios of two characters (length of the first and second pairs of leaflets) to prevent the size of fronds from influencing the results. Unique features of bracken, such as: frond and pinnae shape and orientation; basal pinna structure; ultimate segment of pinnae and pinnula shape and size; frond expansion sequencing; frond lamina texture, shape and pubescence were treated descriptively. Canonical discriminant analysis was employed for a morphometric study of quantitative characters. On their basis, two taxa – P. aquilinum subsp. aquilinum and P. a. subsp. pinetorum were determined.

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Delimiting species boundaries within the Bothriochloa saccharoides complex (Poaceae) through morphometric analysis

Phytotaxa ◽

10.11646/phytotaxa.89.1.2 ◽

2013 ◽

Vol 89 (1) ◽

pp. 24

Author(s):

LIDIA R. SCRIVANTI ◽

GUILLERMO A. NORRMANN ◽

ANA M. ANTON

Keyword(s):

Discriminant Analysis ◽

Morphometric Analysis ◽

Principal Components ◽

Morphological Variation ◽

Species Complex ◽

Morphological Characters ◽

Chemical Data ◽

Species Boundaries ◽

Herbarium Specimens ◽

Components Analysis

The Bothriochloa saccharoides complex is one of the most interesting groups within the genus Bothriochloa (Poaceae). The plants inhabit grasslands of tropical and subtropical regions from the Americas. Principal components analysis (PCA) and discriminant analysis (DA) were employed to evaluate the morphological variation among 60 herbarium specimens tentatively identified as B. imperatoides, B. laguroides, B. longipaniculata, B. saccharoides and B. torreyana. Twenty-three morphological characters were included in the analysis in order to clarify problematic species boundaries. Chemical data was incorporated to improve the resolution on delimitation of the species complex. Taxa were delimited according to the observed clustering of specimens in the PCA plots and discriminant analysis, and diagnostic characters were identified. The results showed that five taxa could be distinguished on the basis of morphological characters and chemical data. Two new subspecies are described: B. saccharoides subsp. americana and B. saccharoides subsp. australis. An identification key and a taxonomic synopsis are provided.

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