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| http://dx.doi.org/10.14797/mdcj-10-3-201 | DOI Listing |
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Small fish, large variation: Morphological diversity of Weberian apparatus in Noturus catfishes and ecological implications.
Anat Rec (Hoboken)
January 2025
Department of Integrative Biology, University of California, Berkeley, California, USA.
The Weberian apparatus is a hearing specialization unique to the otophysan fishes, and an unexpected degree of morphological variation exists in species of the Noturus catfishes. Our aim in this study is to investigate relationships between morphological variations and ecology that may drive this variation. Sampling 48 specimens representing 25 species, we investigated morphological diversity and accounted for ecological variables using landmark-based 3D geometric morphometrics and x-ray-based computed tomography (CT) images.
View Article and Find Full Text PDFComparing microCT Staining and Scanning Methodology for Brain Studies in Various Sizes of Spiders.
J Comp Neurol
January 2025
School of Natural Sciences, Macquarie University, Sydney, New South Wales, Australia.
Recent advances in microCT are facilitating the investigation of microstructures in spiders and insects leading to an increased number of studies investigating their neuroanatomy. Although microCT is a powerful tool, its effectiveness depends on appropriate tissue preparation and scan settings, particularly for soft, non-sclerotized tissues, such as muscles, organs, and neural tissues. As the application of microCT in spiders is only in its infancy, published protocols are often difficult to implement due to substantial size variation of the specimens.
View Article and Find Full Text PDFEstimating Wingbeat Frequency of Hummingbirds using a No-labeling Learning Computer Vision Approach.
Integr Comp Biol
January 2025
Centro de investigación Colibrí Gorriazul, Cundinamarca, Colombia.
Wingbeat frequency estimation is an important aspect for the study of avian flight, energetics, and behavioral patterns, among others. Hummingbirds, in particular, are ideal subjects to test a method for this estimation due to their fast wing motions and unique aerodynamics, which results from their ecological diversification, adaptation to high-altitude environments, and sexually selected displays. Traditionally, wingbeat frequency measurements have been done via "manual" image/sound processing.
View Article and Find Full Text PDFIntegrating Deep Learning Derived Morphological Traits and Molecular Data for Total-Evidence Phylogenetics: Lessons from Digitized Collections.
Syst Biol
January 2025
Department of Computer Science, University of Copenhagen, Copenhagen, DK-2100, Denmark.
Deep learning has previously shown success in automatically generating morphological traits which carry a phylogenetic signal. In this paper we explore combining molecular data with deep learning derived morphological traits from images of pinned insects to generate total-evidence phylogenies and we reveal challenges. Deep learning derived morphological traits, while informative, underperform when used in isolation compared to molecular analyses.
View Article and Find Full Text PDFPeriodic Light Modulations for Low-Cost Wide-Field Imaging of Luminescence Kinetics Under Ambient Light.
Adv Sci (Weinh)
January 2025
PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 24, rue Lhomond, Paris, 75005, France.
Imaging luminescence kinetics is invaluable in many fields, including biology and chemistry. However, the luminescence lifetime of most photo-activated states is in the low ns-µs range and its measurement requires adding costly image intensifiers to cameras to access the fast phenomena present. Here, the Rectified Imaging under Optical Modulation (RIOM) and Heterodyne Imaging under Optical Modulation (HIOM) protocols make this possible with standard low-cost cameras only, even under ambient light.
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