Morphology and Herpetology: How and Why They Interact

Wake, Marvalee H.

doi:10.1670/11-221

Cited by 6 publications

(4 citation statements)

References 76 publications

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“…In vertebrate morphology 3D imaging techniques are currently widely used for qualitative analyses of inner anatomy. Modern volume and surface rendering software allows detailed analyses of morphological structures (Wake, 2012). Nonetheless, quantitative comparative analyses like GM remain rare in 3D.…”

Section: Introductionmentioning

confidence: 99%

Do we need the third dimension? Quantifying the effect of the z‐axis in 3D geometric morphometrics based on sailfin silversides (Telmatherinidae)

Wasiljew

Pfaender²,

Wipfler‍

et al. 2020

Journal of Fish Biology

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This study investigated the impact of the third dimension in geometric morphometrics (GM) using sailfin silversides (Telmatherinidae) from the Malili Lakes of Sulawesi (Indonesia). The three morphospecies of the monophyletic "roundfin" radiation are laterally compressed and vary in shape traits. The results of 2D and 3D GM were compared and quantified to discuss the advantages and disadvantages of both methods for closely related species and their sexes. This approach focused on the head because it is far more complex and three-dimensionally structured than the trunk or the caudal region. The results revealed no significant benefit concerning repeatability and measurement error in 3D GM compared to 2D GM. The z-axis contributed substantially to the variance of the 3D data set but was irrelevant for discrimination of species and sexes in the approach. Limited gain in information was contrasted by substantially higher effort for 3D compared to the 2D analyses. The study concluded that 2D GM is the more efficient shape analysis approach for discriminating roundfins. Broader studies are needed to test which of the two methods is more efficient in distinguishing laterally compressed fishes in general. For future studies, due to the high investment required, this study recommends carefully evaluating the necessity of 3D GM. If in doubt, this study suggests testing for congruence between 2D and 3D GM with a subsample and consequently applying 2D GM in the case of high congruence.

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Section: Introductionmentioning

confidence: 99%

Do we need the third dimension? Quantifying the effect of the z‐axis in 3D geometric morphometrics based on sailfin silversides (Telmatherinidae)

Wasiljew

Pfaender²,

Wipfler‍

et al. 2020

Journal of Fish Biology

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“…Biological collections contribute deep reservoirs of anatomical and morphological information for extinct and extant biodiversity and are essential for our understanding of life on Earth. While molecular approaches are now a central means for delimiting species and understanding phylogenetic relationships, characterization of the phenotype remains fundamental to analyzing patterns of diversity across space and time ( Wiens 2008 ; Wake 2012 ; Lee and Palci 2015 ). Newly developed technologies and cyberinfrastructure improvements to capture, store, and disseminate phenotypic data have the potential to accelerate morphological research across wide-ranging disciplines such as evolutionary biology, ecology, and conservation science.…”

Section: Introductionmentioning

confidence: 99%

Phototank setup and focus stack imaging method for reptile and amphibian specimens (Amphibia, Reptilia)

Braker¹

2022

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Fluid-preserved reptile and amphibian specimens are challenging to photograph with traditional methods due to their complex three-dimensional forms and reflective surfaces when removed from solution. An effective approach to counteract these issues involves combining focus stack photography with the use of a photo immersion tank. Imaging specimens beneath a layer of preservative fluid eliminates glare and risk of specimen desiccation, while focus stacking produces sharp detail through merging multiple photographs taken at successive focal steps to create a composite image with an extended depth of field. This paper describes the wet imaging components and focus stack photography workflow developed while conducting a large-scale digitization project for targeted reptile and amphibian specimens housed in the University of Colorado Museum of Natural History Herpetology Collection. This methodology can be implemented in other collections settings and adapted for use with fluid-preserved specimen types across the Tree of Life to generate high-quality, taxonomically informative images for use in documenting biodiversity, remote examination of fine traits, inclusion in publications, and educational applications.

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“…Variation in three structural components-the opercle, the pharyngeal jaw, and the buccal cavity-which are directly linked to prey capture, prey processing, and habitat usage in fishes, was studied with µ-CT Imaging. This technique enables one to investigate particularly small-scaled variation of internal structures with great detail and precision without damaging the samples (Adams et al, 2004;Kaliontzopoulou, 2011;Wake, 2012;Wasiljew et al, 2020). Interspecific and intersexual variation was analyzed using different three-dimensional morphometric approaches ranging from classical measurements of distances to landmark-free geometric, morphometric analyses.…”

Section: Introductionmentioning

confidence: 99%

Sexual dimorphism in an adaptive radiation: Does intersexual niche differentiation result in ecological character displacement?

Wasiljew

Pfaender²,

Wipfler‍

et al. 2021

Ecology and Evolution

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Morphology and Herpetology: How and Why They Interact

Cited by 6 publications

References 76 publications

Do we need the third dimension? Quantifying the effect of the z‐axis in 3D geometric morphometrics based on sailfin silversides (Telmatherinidae)

Do we need the third dimension? Quantifying the effect of the z‐axis in 3D geometric morphometrics based on sailfin silversides (Telmatherinidae)

Phototank setup and focus stack imaging method for reptile and amphibian specimens (Amphibia, Reptilia)

Sexual dimorphism in an adaptive radiation: Does intersexual niche differentiation result in ecological character displacement?

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Morphology and Herpetology: How and Why They Interact

Cited by 6 publications

References 76 publications

Do we need the third dimension? Quantifying the effect of the z‐axis in 3D geometric morphometrics based on sailfin silversides (Telmatherinidae)

Do we need the third dimension? Quantifying the effect of the z‐axis in 3D geometric morphometrics based on sailfin silversides (Telmatherinidae)

﻿Phototank setup and focus stack imaging method for reptile and amphibian specimens (Amphibia, Reptilia)

Sexual dimorphism in an adaptive radiation: Does intersexual niche differentiation result in ecological character displacement?

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Phototank setup and focus stack imaging method for reptile and amphibian specimens (Amphibia, Reptilia)