scholarly journals Exploratory Analysis of Color Forms’ Variability in the Invasive Asian Lady Beetle Harmonia axyridis (Pallas 1773)

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2436
Author(s):  
Darija Lemic ◽  
Ivana Pajač Živković ◽  
Matea Šuliček ◽  
Hugo A. Benítez
Keyword(s):  
Harmonia Axyridis ◽  
Geometric Morphometric ◽  
Genetic Changes ◽  
Asian Lady Beetle ◽  
Significant Difference ◽  
Morphometric Methods ◽  
Geometric Morphometric Analysis ◽  
Left And Right ◽  
Number Of Individuals ◽  
Harmonia Axyridis Pallas

The Asian ladybird (Harmonia axyridis Pallas), native to Asia, is one of the 100 most invasive species in the world and has spread worldwide. This study aimed to characterize color forms of H. axyridis in Croatia and to analyze the variability of wing shape between populations and indicated forms. Geometric morphometric methods were used to analyze a total of 129 left and right wings in males and 126 left and right wings in females of H. axyridis collected from four different sites in Croatia. The results show a significant difference in wing shapes between the studied forms. Each form had its own specific morphotype that likely originated under the influence of genetic changes in the species. This study demonstrates that the use of geometric morphometric analysis is effective in studying the variability in H. axyridis populations. As this study is the first of its kind, for further clarity, it is necessary to conduct additional studies on a larger number of sites and an equal number of individuals of all forms.

First Arizona Records of the Multicolored Asian Lady Beetle,Harmonia axyridis(Pallas) (Coleoptera: Coccinellidae)

2010 ◽  
Vol 64 (1) ◽  
pp. 51-52 ◽  
Author(s):  
Kent Fothergill ◽  
Wendy Moore ◽  
John Losey ◽  
Leslie L. Allee ◽  
Rebecca R. Smyth
Keyword(s):  
Harmonia Axyridis ◽  
Lady Beetle ◽  
Asian Lady Beetle ◽  
Multicolored Asian Lady Beetle ◽  
Harmonia Axyridis Pallas

scholarly journals A Comparison of Traditional and Geometric Morphometric Techniques for the Study of Basicranial Morphology in Horses: A Case Study of the Araucanian Horse from Colombia

Animals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 118
Author(s):  
Pere Miquel Parés-Casanova ◽  
Arcesio Salamanca-Carreño ◽  
René Alejandro Crosby-Granados ◽  
Jannet Bentez-Molano
Keyword(s):  
Geometric Morphometrics ◽  
Domestic Animal ◽  
New Techniques ◽  
Geometric Morphometric ◽  
Animal Populations ◽  
Morphometric Methods ◽  
Mature Group ◽  
Geometric Morphometric Analysis ◽  
Shape And Size

Skull size and shape have been widely used to study domestic animal populations and breeds. Although several techniques have been proposed to quantify cranial form, few attempts have been made to compare the results obtained by different techniques. While linear morphometrics has traditionally been used in breed characterization, recent advances in geometric morphometrics have created new techniques for specifically quantifying shape and size. The objective of this study was to compare two morphometric methods for their ability to describe external morphology. For this purpose, 20 skull specimens of adult male Araucanian horses were examined. Two age categories were established (the “mature group”, M3 not fully erupted to moderately worn, n = 7; and the “senile group”, M3 totally erupted and highly worn, n = 13). Both methods showed that there were statistical differences between generations, but discrimination rates were different between methods with the geometric morphometric analysis obtaining a rate of 97.5%. Although linear morphometrics was found to be compatible with geometric morphometrics, the latter was better able to discriminate the two groups and it also provides more information on shape.

scholarly journals IDENTIFICATION OF THE HONEYBEE SUBSPECIES FROM SOME ROMANIAN COUNTIES USING A SEMIAUTOMATIC SYSTEM FOR ANALYZING WINGS

2018 ◽  
Vol 6 ◽  
pp. 1124-1128
Author(s):  
Elena Buescu ◽  
Maria Rodica Gurau ◽  
Doina Danes
Keyword(s):  
Apis Mellifera ◽  
Morphometric Analysis ◽  
Geometric Morphometric ◽  
Eastern Area ◽  
Three Samples ◽  
Morphometric Methods ◽  
Semiautomatic System ◽  
Geometric Morphometric Analysis ◽  
Honeybee Subspecies ◽  
Geometric Morphometric Method

Morphometric analysis of honeybee wings can be used to discriminate between honeybee subspecies. The classic morphometric methods used to identify honeybee subspecies are time consuming while geometric morphometric analysis are proven to be more efficient and rapid for the identification of honeybee subspecies.  Even if the geometric morphometric analysis involves several steps such as: obtaining the image of the honeybee wing,  processing the wings image (settlement of the 19 points), classification and validation, in terms of consumed time,it  takes less than classic morphometric methodes and it is easier to apply. The aim of this study was to identify honeybee subspecies from the Romanian South-Eastern area, using the geometric morphometric method. To accomplish this, the semiautomated French system ApiClass was used. This system  allows us to identify the honeybee subspecies based on the wing's image of the Apis mellifera honeybee worker. The program is using the recent approaches of geometric morphometry and is analyzing the wing considering 19 points  corresponding to the intersections of the main veins of the bee forewings. These coordinates are processed by the system before being analyzed  after which the system returns the probability of  the analyzed honeybee belonging to one of the honeybee subspecies from its reference system. The system has more than 5000 honeybee wing references  off the main lines and honeybee subspecies.  Using this system we analyzed  samples from the counties of Braila, Buzau, Galati and Ilfov. Each sample was composed from wings of  20 honeybees. Most of the analyzed samples were identified as hybrids without being possible  to specify the type or the level of the hybridization: only three samples were identified as being Apis mellifera carnica presenting a homology degree over 90%.

scholarly journals Geometric morphometric analysis of intratrackway variability: A case study on theropod and ornithopod dinosaur trackways from Münchehagen (Lower Cretaceous, Germany)

2016 ◽  
Author(s):  
Jens N Lallensack ◽  
Anneke H van Heteren ◽  
Oliver Wings
Keyword(s):  
Morphometric Analysis ◽  
Lower Cretaceous ◽  
Principal Component ◽  
Lower Saxony ◽  
Geometric Morphometric ◽  
Variable Regions ◽  
Substrate Properties ◽  
Geometric Morphometric Analysis ◽  
Left And Right

A profound understanding of the influence of trackmaker anatomy, foot movements and substrate properties is crucial for any interpretation of fossil tracks. In this case study we analyze variability of footprint shape within one large theropod (T3), one medium-sized theropod (T2) and one ornithopod (I1) trackway from the Lower Cretaceous of Münchehagen (Lower Saxony, Germany) in order to determine the informativeness of individual features and measurements for ichnotaxonomy, trackmaker identification, and the discrimination between left and right footprints. Landmark analysis is employed based on interpretative outline drawings derived from photogrammetric data, allowing for the location of variability within the footprint and the assessment of covariation of separate footprint parts. Objective methods to define the margins of a footprint are tested and shown to be sufficiently accurate to reproduce the most important results. The lateral hypex and the heel are the most variable regions in the two theropod trackways. As indicated by principal component analysis, a posterior shift of the lateral hypex is correlated with an anterior shift of the margin of the heel. This pattern is less pronounced in the ornithopod trackway, indicating that variation patterns can differ in separate trackways. In all trackways, hypices vary independently from each other, rendering their relative position a questionable feature for ichnotaxonomic purposes. Most criteria commonly employed to differentiate between left and right footprints assigned to theropods are found to be reasonably reliable. The described ornithopod footprints are asymmetrical, again allowing for a left-right differentiation. Strikingly, 12 out of 19 measured footprints of the T2 trackway are stepped over the trackway midline, rendering the trackway pattern a misleading left-right criterion for this trackway. Traditional measurements were unable to differentiate between the theropod and the ornithopod trackways. Geometric morphometric analysis reveals potential for improvement of existing discriminant methods.

scholarly journals Geometric morphometric analysis of intratrackway variability: A case study on theropod and ornithopod dinosaur trackways from Münchehagen (Lower Cretaceous, Germany)

2016 ◽  
Author(s):  
Jens N Lallensack ◽  
Anneke H van Heteren ◽  
Oliver Wings
Keyword(s):  
Morphometric Analysis ◽  
Lower Cretaceous ◽  
Principal Component ◽  
Lower Saxony ◽  
Geometric Morphometric ◽  
Variable Regions ◽  
Substrate Properties ◽  
Geometric Morphometric Analysis ◽  
Left And Right

A profound understanding of the influence of trackmaker anatomy, foot movements and substrate properties is crucial for any interpretation of fossil tracks. In this case study we analyze variability of footprint shape within one large theropod (T3), one medium-sized theropod (T2) and one ornithopod (I1) trackway from the Lower Cretaceous of Münchehagen (Lower Saxony, Germany) in order to determine the informativeness of individual features and measurements for ichnotaxonomy, trackmaker identification, and the discrimination between left and right footprints. Landmark analysis is employed based on interpretative outline drawings derived from photogrammetric data, allowing for the location of variability within the footprint and the assessment of covariation of separate footprint parts. Objective methods to define the margins of a footprint are tested and shown to be sufficiently accurate to reproduce the most important results. The lateral hypex and the heel are the most variable regions in the two theropod trackways. As indicated by principal component analysis, a posterior shift of the lateral hypex is correlated with an anterior shift of the margin of the heel. This pattern is less pronounced in the ornithopod trackway, indicating that variation patterns can differ in separate trackways. In all trackways, hypices vary independently from each other, rendering their relative position a questionable feature for ichnotaxonomic purposes. Most criteria commonly employed to differentiate between left and right footprints assigned to theropods are found to be reasonably reliable. The described ornithopod footprints are asymmetrical, again allowing for a left-right differentiation. Strikingly, 12 out of 19 measured footprints of the T2 trackway are stepped over the trackway midline, rendering the trackway pattern a misleading left-right criterion for this trackway. Traditional measurements were unable to differentiate between the theropod and the ornithopod trackways. Geometric morphometric analysis reveals potential for improvement of existing discriminant methods.

Fly Catcher Effect in Harmonia axyridis (Pallas)? No Attraction to Lady Beetle Images on Flight Traps

2007 ◽  
Vol 42 (4) ◽  
pp. 496-500 ◽  
Author(s):  
Christine A. Nalepa
Keyword(s):  
Harmonia Axyridis ◽  
Field Tests ◽  
Lady Beetle ◽  
Migratory Flight ◽  
Significant Difference ◽  
Lady Beetles ◽  
Harmonia Axyridis Pallas

Field tests were conducted to determine if, at the conclusion of their autumn migratory flight, Harmonia axyridis (Pallas) are attracted to and preferentially alight on targets covered with the printed images of lady beetles. There was no significant difference in the number of beetles that landed on targets bearing depictions of coccinellids compared with the number that landed on blank, white controls. Results suggest that commercial traps that rely on images of lady beetles to attract incoming coccinellids are of little practical value.

scholarly journals Compatibility of selected biorational pesticides with the predatory arthropods in brinjal ecosystem

2017 ◽  
Vol 15 (2) ◽  
Author(s):  
T Islam ◽  
G Das
Keyword(s):  
Harmonia Axyridis ◽  
Wolf Spider ◽  
Lady Beetle ◽  
Wolf Spiders ◽  
Asian Lady Beetle ◽  
Lady Beetles ◽  
Mortality Percentage ◽  
Harmonia Axyridis Pallas ◽  
Predatory Arthropods ◽  
Significant Mortality

Susceptibility of three predatory arthropods namely Asian lady beetle, Harmonia axyridis (Pallas), lynx spider, Lycosa pseudoannulata (Boescriberg and Strand), and wolf spider, Oxyopes javanus (Thorell) to four commonly used biorational molecules viz. buprofezin, spinosad, emamectin benzoate and abamectin were determined in a brinjal ecosystem. Biorational pesticides were applied singly and in some selected combinations and their toxicity on the predators was recorded up to three sprayings in a confined habitat. Buprofezin caused no significant mortality of predators (2.87%, 0.32%, 0.96% mean mortality per spray of Asian lady beetle, lynx spider, and wolf spider respectively) and was found most compatible among the biorational molecules. However, other three tested molecules were found highly toxic for all predatory natural enemies when applied singly or in combination with buprofezin. Spinosad was most toxic for Asian lady beetles (21.84% mean mortality per spray) and lynx spiders (15.32 % mean mortality per spray) whereas abamectin (17.78% mean mortality per spray) for wolf spiders. It was observed that the number of spraying was very crucial and had a proportionate relationship with the mortality percentage of predators. Based on this study it is suggested that buprofezin could be considered to incorporate safely in the IPM program for brinjal pest management.J. Bangladesh Agril. Univ. 15(2): 234-238, December 2017

scholarly journals Geometric morphometric analysis of intratrackway variability: a case study on theropod and ornithopod dinosaur trackways from Münchehagen (Lower Cretaceous, Germany)

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2059 ◽  
Author(s):  
Jens N. Lallensack ◽  
Anneke H. van Heteren ◽  
Oliver Wings
Keyword(s):  
Morphometric Analysis ◽  
Lower Cretaceous ◽  
Principal Component ◽  
Lower Saxony ◽  
Geometric Morphometric ◽  
Variable Regions ◽  
Substrate Properties ◽  
Geometric Morphometric Analysis ◽  
Left And Right

A profound understanding of the influence of trackmaker anatomy, foot movements and substrate properties is crucial for any interpretation of fossil tracks. In this case study we analyze variability of footprint shape within one large theropod (T3), one medium-sized theropod (T2) and one ornithopod (I1) trackway from the Lower Cretaceous of Münchehagen (Lower Saxony, Germany) in order to determine the informativeness of individual features and measurements for ichnotaxonomy, trackmaker identification, and the discrimination between left and right footprints. Landmark analysis is employed based on interpretative outline drawings derived from photogrammetric data, allowing for the location of variability within the footprint and the assessment of covariation of separate footprint parts. Objective methods to define the margins of a footprint are tested and shown to be sufficiently accurate to reproduce the most important results. The lateral hypex and the heel are the most variable regions in the two theropod trackways. As indicated by principal component analysis, a posterior shift of the lateral hypex is correlated with an anterior shift of the margin of the heel. This pattern is less pronounced in the ornithopod trackway, indicating that variation patterns can differ in separate trackways. In all trackways, hypices vary independently from each other, suggesting that their relative position a questionable feature for ichnotaxonomic purposes. Most criteria commonly employed to differentiate between left and right footprints assigned to theropods are found to be reasonably reliable. The described ornithopod footprints are asymmetrical, again allowing for a left–right differentiation. Strikingly, 12 out of 19 measured footprints of the T2 trackway are stepped over the trackway midline, rendering the trackway pattern a misleading left–right criterion for this trackway. Traditional measurements were unable to differentiate between the theropod and the ornithopod trackways. Geometric morphometric analysis reveals potential for improvement of existing discriminant methods.

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