Results 41 to 50 of about 125,407 (302)

Sexual dimorphism and ancestral variation in the pectoral and pelvic girdles of modern humans

Homo, 2023
Discussions of the evolution of sexual dimorphism in torso shape and the pectoral region assume that this dimorphism exists independently of body size.
Daphne R. Hudson, John H. Langdon
doaj   +1 more source

Sex Ratio and Sexual Dimorphism in \u3ci\u3eFormica Exsectoides\u3c/i\u3e, the Allegheny Mound Ant (Hymenoptera: Formicidae) [PDF]

, 2018
We excavated 66 mounds from 6 populations of Formica exsectoides in Michigan jack pine, collecting sexual caste pupae for sex ratio estimates and measurement of dimorphism.
Bristow, C. M, Rowe, H. C
core   +2 more sources

A Testis‐Specific Aralkylamine N‐Acetyltransferase Regulates Dimorphic Sperm Function and Male Fertility in Moths

Advanced Science, EarlyView.
We identify a Lepidoptera‐conserved testis‐specific arylalkylamine N‐acetyltransferase (LTNAT) that governs male moth fertility via a novel mechanism. LTNAT loss disrupts eupyrene sperm mitochondrial derivatives and impairs apyrene sperm motility, offering a safe molecular target for innovative pesticides and genetic pest control.
Hao Sun, Peng‐Yi Huang, Zhi‐Ruo Zhang, Cong‐Fen Gao, Subba Reddy Palli, Shun‐Fan Wu   +5 more
wiley   +1 more source

Sexual Dimorphism in Fin Size and Shape in North American Killifish

Ecology and Evolution
Sexual dimorphism is intriguing because it suggests that males and females differ in phenotypic optima for traits and that sex‐specific trait values can evolve despite a shared genome.
Elijah J. Davis, Kasey Brockelsby, Milton Tan, Rebecca C. Fuller   +3 more
doaj   +1 more source

Morphometric differentiation and sexual dimorphism in Limnomedusa macroglossa (Duméril & Bibron, 1841) (Anura: Alsodidae) from Uruguay

Acta Herpetologica, 2021
Intersexual morphological differences within a species occur in many traits, including body size and shape. Many processes that cause geographic variability in morphology have been proposed: population structure, phenotypic plasticity (environmental ...
Valeria de Olivera-López, Arley Camargo, Raúl Maneyro   +2 more
doaj   +1 more source

Morphological variation of the newly confirmed population of the javelin sand boa, Eryx jaculus (Linnaeus, 1758) (Serpentes, erycidae) in Sicily, Italy [PDF]

, 2019
The presence of the Javelin sand boa in Sicily has recently been confirmed. Here the morphological characters and sexual dimorphism of the Sicilian population of Eryx jaculus are presented.
Barra S. A., Chiara R., Faraone F. P., Giacalone G., Lo Valvo M., Russotto S.   +5 more
core   +1 more source

Phenotypic Diversity and Outcomes in Pediatric NMDA Receptor Encephalitis: A 15‐Year Retrospective Study from the Largest Children's Hospital in the United States

Advanced Science, EarlyView.
ABSTRACT Anti‐NMDAR encephalitis (NMDARE) is an autoantibody‐mediated disorder characterized by seizures, movement disorders, neurocognitive deficits, and psychosis, but the complete phenotypic heterogeneity, and outcomes are incompletely understood in children.
Alexander J. Sandweiss, Timothy Erickson, Yike Jiang, Varun Kannan, Jonathan M. Yarimi, Kristen S. Fisher, Nikita Shukla, Tim Lotze, Eyal Muscal, Kristy O. Murray   +9 more
wiley   +1 more source

Facial and body sexual dimorphism are not interconnected in the Maasai

Journal of Physiological Anthropology, 2022
Background In this paper, we investigate facial sexual dimorphism and its’ association with body dimorphism in Maasai, the traditional seminomadic population of Tanzania.
Marina L. Butovskaya, Victoria V. Rostovtseva, Anna A. Mezentseva   +2 more
doaj   +1 more source

Ecomorphological Variation in Three Species of Cybotoid Anoles [PDF]

, 2017
© 2018 by The Herpetologists' League, Inc. Caribbean Anolis lizards exhibit a complex suite of ecological, morphological, and behavioral traits that allow their specialization to particular microhabitats. These microhabitat specialists, called ecomorphs,
Ivanov, Brittney M., Johnson, Michele A., Kahrl, Ariel F., Valero, Katharina C. Wollenberg   +3 more
core   +2 more sources

Sexual dimorphism in dinosaurs

eLife, 2023
Studying fossils from a mass-mortality event reveals evidence for sexual dimorphism and, unusually, equal numbers of males and females in a herd of dinosaurs.
Nizar Ibrahim, Roy E Smith, Stella A Ludwig   +2 more
openaire   +3 more sources