Article
Multidisciplinary Sciences
Mathieu Boisville, Narimane Chatar, Olivier Lambert, Leonard Dewaele
Summary: The present study combines qualitative comparison and quantitative analysis of walrus mandibles to identify sexual dimorphism and demonstrate its statistical significance. The results show new morphological differences between males and females and suggest that mandibular morphology can be used to determine the sex of isolated mandibles. This study provides a starting point for further research on sexual dimorphism and inter- and intraspecific variation in fossil walrus mandibles.
Article
Chemistry, Multidisciplinary
Dario Herranz-Rodrigo, Silvia J. Tardaguila-Giacomozzi, Lloyd A. Courtenay, Juan-Jose Rodriguez-Alba, Antonio Garrucho, Jesus Recuero, Jose Yravedra
Summary: This study examines the tooth marks left by tigers and leopards on bones, finding that sexual dimorphism does not influence the morphology of tooth marks in these felid species.
APPLIED SCIENCES-BASEL
(2021)
Article
Parasitology
Gisel V. V. Gigena, Claudia S. S. Rodriguez, Federico G. G. Fiad, Maria Laura Hernandez, Ana Laura Carbajal-de-la-Fuente, Romina V. V. Piccinali, Paz Sanchez Casaccia, Antonieta Rojas de Arias, Patricia Lobbia, Luciana Abrahan, Marinely Bustamante Gomez, Jorge Espinoza, Florencia Cano, Julieta Nattero
Summary: The flight-related traits of the Triatoma guasayana population varied across different populations, with significant differences in wing shape and head size between the brachypterous population and the others. Geographic and climatic factors were associated with flight-related traits.
PARASITES & VECTORS
(2023)
Article
Multidisciplinary Sciences
Katarina Harnadkova, Karolina Kocandrlova, Lenka Kozejova Jaklova, Jan Dupej, Jana Veleminska
Summary: The study aimed to describe facial directional asymmetry (DA) in different age categories of adults using 3D methods. The results showed that there were differences in facial DA between sexes and among age groups, with the youngest males exhibiting the most pronounced asymmetry.
Article
Biology
Romain Pintore, Raphael Cornette, Alexandra Houssaye, Ronan Allain
Summary: This study uses 3D geometric morphometrics and Gaussian mixture modeling to investigate hindlimb variation in the best-preserved specimens from a herd of ornithomimosaurs. The results reveal evidence of sexual dimorphism, which is important for a better understanding of intraspecific variation in fossil dinosaurs and addressing taxonomical and ecological questions related to dinosaur evolution.
Article
Marine & Freshwater Biology
Michaela Kerschbaumer, Lisbeth Postl, Christian Sturmbauer
Summary: This study compared the shape of viscerocranial bones among different Tropheus populations and found significant morphological differences between sympatric and non-sympatric populations, as well as extensive variation within and among species. Sexual dimorphism was also evident in the viscerocranial bones analyzed. The study suggests that differences in ecologically relevant traits, such as bones of the preorbital region, play an important role in the process of niche separation and cichlid fishes diversification.
Article
Entomology
Sanja Budecevic, Uros Savkovic, Mirko Dordevic, Lea Vlajnic, Biljana Stojkovic
Summary: This study on the seed beetle Acanthoscelides obtectus found that females were larger than males and had different modular organization, indicating that reproductive function plays a central role in forming patterns of modularity.
Article
Fisheries
Jordan Hernandez, Amado Villalobos-Leiva, Adriana Bermudez, Daniela Ahumada-Cabarcas, Manuel J. Suazo, Hugo A. Benitez
Summary: C. kraussii is an endemic fish species from Colombia and Venezuela, and it is a valuable food resource for local communities. The management and captive breeding of this species face difficulties due to the anatomical similarities between sexes and the cryptic morphological behavior. A study on individuals from different localities revealed sexual dimorphism within locations, with males exhibiting less morphological variability and females exhibiting greater morphological disparity. This dimorphism may be influenced by environmental variation.
Article
Agriculture, Dairy & Animal Science
Darija Lemic, Helena Viric Gasparic, Patricija Majcenic, Ivana Pajac Zivkovic, Mario Bjelis, Manuel J. Suazo, Margarita Correa, Jordan Hernandez, Hugo A. Benitez
Summary: This study aimed to investigate the morphological variability of the box tree moth from Croatia and assess its invasive characteristics, flight potential, and risk of further spread. The results revealed significant differences in wing shapes between populations from different geographical locations, as well as subtle wing shape sexual dimorphism.
Article
Agriculture, Dairy & Animal Science
Chao Wang, Zhou Fang
Summary: This study analyzed the ontogenetic variation and sexual dimorphism of beak shape in Octopus minor, Uroteuthis edulis, Sepia esculenta, and Sthenoteuthis oualaniensis in China's coastal waters using geometric morphometrics methods. The results showed significant differences in beak shape among different ontogenetic stages, and these differences may be related to habitat-driven variation.
Article
Biology
Diana Toneva, Silviya Nikolova, Elena Tasheva-Terzieva, Dora Zlatareva, Nikolai Lazarov
Summary: Sex estimation is crucial in identifying unknown bone remains. By using geometric morphometric techniques, this study investigated sexual dimorphism in the size and shape of the facial skeleton. The findings showed that size is a more useful indicator of sex than shape, but the best discrimination is achieved when both size and shape are considered together. This information is valuable for developing effective sex estimation methods.
Article
Environmental Sciences
P. Vermeiren, C. Lennard, C. Trave
Summary: The study explored the influence of sexual, allometric, and habitat factors on morphological variation in the intertidal mangrove crab assemblage. Results showed significant sexual dimorphism in claw size among different species, with claw and carapace shapes displaying high correlations and varying along a taxonomic gradient.
ESTUARIES AND COASTS
(2021)
Article
Biology
Patrick T. Rohner, David M. Linz, Armin P. Moczek
Summary: The study found that gene networks associated with trait exaggeration are highly dependent on precise developmental contexts, and the doublesex gene shapes morphological exaggeration differently in different developmental contexts. The context-specific dsx-mediated trait exaggeration may diversify rapidly.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Editorial Material
Biology
Stella A. Ludwig, Roy E. Smith, Nizar Ibrahim
Summary: Studying fossils from a mass-mortality event reveals evidence of sexual dimorphism and an equal number of males and females in a herd of dinosaurs.
Article
Zoology
Marina Meireles dos Santos, Julia Klaczko, Ana Lucia da Costa Prudente
Summary: This study analyzes sexual dimorphism in skull and body size and shape in three malacophagous dipsadine snakes, finding that the skull size and shape differ between males and females. Females have longer and thinner skulls. Additionally, females are larger overall. There is covariation between skull shape and body size and an allometric relationship between body and tail size in males.
Article
Fisheries
Ieremias Chousidis, Theodoros Chatzimitakos, Constantine Stalikas, Ioannis Leonardos
Summary: This study investigated the effect of 2,6-dichloro-3-hydroxy-1,4-benzoquinone (2,6-DCBQ-OH) on zebrafish embryos. The results showed that exposure to 2,6-DCBQ-OH led to developmental, morphological, behavioral abnormalities, and metabolic collapse in zebrafish. Metabolomic study revealed the impact of 2,6-DCBQ-OH on various metabolic pathways, including oxidative stress, reduced swimming activity, and endocrine disruption.
Article
Biochemistry & Molecular Biology
Theodoros Chatzimitakos, Ieremias Chousidis, Dimitrios Leonardos, Constantine Stalikas, Ioannis Leonardos
Summary: The study reveals the potentially detrimental effects of tetrahydrocannabinol (THC) on zebrafish larvae, including adverse effects on phenotype, fundamental functions, behavioral changes, and metabolic alterations.