Morfometría Geométrica y sus Nuevas Aplicaciones en Ecología y Biología Evolutiva. Parte 2

Villalobos-Leiva, Amado; Benítez, Hugo A.

doi:10.4067/s0717-95022020000601818

Cited by 15 publications

(13 citation statements)

References 56 publications

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“…The use of geometric morphometrics in FA studies has provided a method to analyze matters that had been already addressed in FA studies with traditional morphometrics, using linear measures as length measurements (Figure 3). This has opened original research paths that address questions related with topics such as morphological integration [4,10,57].…”

Section: Fluctuating Asymmetry Using Geometric Morphometricsmentioning

confidence: 99%

Breaking Symmetry: Fluctuating Asymmetry and Geometric Morphometrics as Tools for Evaluating Developmental Instability under Diverse Agroecosystems

et al. 2020

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Fluctuating asymmetry (FA), in contrast with other asymmetries, is the bilateral asymmetry that represents small, random developmental differences between right and left sides. After nearly a century of using traditional morphometrics in the estimation of FA, geometric morphometrics (GM) now provides new insights into the use of FA as a tool, especially for assessing environmental and developmental stress. Thus, it will be possible to assess adaptation to various environmental stressors as particular triggers for unavoidable selection pressures. In this review, we describe measures of FA that use geometric morphometrics, and we include a flow chart of the methodology. We also describe how this combination (GM + FA) has been tested in several agroecosystems. Nutritional stress, temperature, chemical pollution, and population density are known stressors experienced by populations in agroecosystems.

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Section: Fluctuating Asymmetry Using Geometric Morphometricsmentioning

confidence: 99%

Breaking Symmetry: Fluctuating Asymmetry and Geometric Morphometrics as Tools for Evaluating Developmental Instability under Diverse Agroecosystems

et al. 2020

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“…In GM, the methods used to determine sexual dimorphism include applying landmarks, defined as specific, equivalent and homologous points in a biological structure being studied, or semilandmarks, which quantify two-or three-dimensional homologous curves and surfaces and are analyzed together with landmarks [9]. GM allows studying the shape of organisms, providing sound graphic analyses based on which morphometric variation can be quantified and visually perceived within and between the samples of organisms [16,17]. Therefore, studying shape differences in individuals in one species or between species is considered to be of scientific interest, since its comprehension may reveal insights about evolutionary stress and the adaptative mechanisms acting upon them [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

An Overview of Interlocation Sexual Shape Dimorphism in Caquetaia kraussi (Perciformes: Cichlidae): A Geometric Morphometric Approach

Hernández

Villalobos-Leiva

Tobón

et al. 2022

Fishes

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C. kraussii is an endemic fish species from Colombia and Venezuela and represents a valuable food resource for local human communities. Due to its economic importance, the management and captive breeding of this species are of special interest. However, the anatomical similarities between sexes have been a problem for visual identification. It is also important to indicate that C. kraussii has cryptic morphological behavior between sexes, a topic that has been one of the main problems for the implementation of management plans. The following research studied individuals from three different localities along the Canal del Dique, Bolívar Department in Colombia, in which the body shape of C. kraussii was analyzed using geometric morphometric analysis. The analyses detected the presence of intralocality sexual dimorphism in two of the three localities analyzed, showing a low morphological variability among males, presenting conserved body shape, as well as a greater morphological disparity among females. This sexual shape dimorphism may be associated with the environmental variation among different locations. These results suggest the presence of two evolutionary forces acting asymmetrically between the sexes of C. kraussii, with males mostly subject to sexual selection pressure, while females are mainly subject to environmental pressures.

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“…TPSRelw shows two types of shape deformation: the first is the average shape, and the second one is obtained by the partial and relative wraps and denotes the shape changes of each individual. This process is also called principal component analysis, which represents the shape space of possible variation of every specimen [ 38 , 39 ].…”

Section: Methodsmentioning

confidence: 99%

Morphological Stasis in Time? A Triatoma brasiliensis brasiliensis Study Using Geometric Morphometrics in the Long Run

Dias

Dale

Lima-Neiva

et al. 2022

Animals

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Triatoma brasiliensis brasiliensis Neiva, 1911 is one of the most important vectors of Chagas disease in the Brazilian semiarid regions in the north-east. The risk imposed by T. b. brasiliensis to the human populations, due to frequent invasions and/or colonization of the domiciles, demands constant monitoring and control actions as well as an understanding of its evolutionary process. In this context, the following research studies the pattern of shape adaptation over time using a large dataset from 102 years of specimen collections in order to identify the morphological plasticity of this vector in Brazil. This dataset was analyzed using geometric morphometrics tools and the timescale was divided into eight different groups, containing specimens from 1912 to 2014. Geometric morphometrics analysis showed an interesting morphological stasis in the wing shape of T. b. brasiliensis, which allowed us to understand the high capacity of adaptation to changes in climate condition through time, and the invasive status which Triatoma species have around the world. Moreover, these results showed novel findings as an interesting phenotypic pattern, with no modifications in more than 100 years, leading us to understand the shape evolution in Triatominae as a vector species of diseases.

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Morfometría Geométrica y sus Nuevas Aplicaciones en Ecología y Biología Evolutiva. Parte 2

Abstract: VILLALOBOS-LEIVA, A. & BENÍTEZ, H. A. Morfometría geométrica y sus nuevas aplicaciones en ecología y biología evolutiva.

Cited by 15 publications

References 56 publications

Breaking Symmetry: Fluctuating Asymmetry and Geometric Morphometrics as Tools for Evaluating Developmental Instability under Diverse Agroecosystems

Breaking Symmetry: Fluctuating Asymmetry and Geometric Morphometrics as Tools for Evaluating Developmental Instability under Diverse Agroecosystems

An Overview of Interlocation Sexual Shape Dimorphism in Caquetaia kraussi (Perciformes: Cichlidae): A Geometric Morphometric Approach

Morphological Stasis in Time? A Triatoma brasiliensis brasiliensis Study Using Geometric Morphometrics in the Long Run

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