Results 71 to 80 of about 39,975 (260)

Developmental neurogenetics of sexual dimorphism in Aedes aegypti

Frontiers in Ecology and Evolution, 2015
Sexual dimorphism, a poorly understood but crucial aspect of vector mosquito biology, encompasses sex-specific physical, physiological, and behavioral traits related to mosquito reproduction.
Molly eDuman-Scheel, Molly eDuman-Scheel, Molly eDuman-Scheel, Zainulabeuddin eSyed, Zainulabeuddin eSyed   +4 more
doaj   +1 more source

Determining the timeline of gonadal and genital differentiation in male and female equine fetuses allows for early detection and intervention in malformations

The Anatomical Record, EarlyView.
Abstract Sexual differentiation in the equine fetus involves coordinated morphogenetic processes that shape both the gonads and the genital ducts. Although the formation of testes and ovaries has been relatively well documented, the temporal dynamics and morphometric patterns of the mesonephric (Wolffian) and paramesonephric (Müllerian) ducts remain ...
Tais Harumi de Castro Sasahara, Silvio Pires Gomes, Fabio Cesar Magioli Abdala, Bruno Cesar Schimming, Maria Angelica Miglino   +4 more
wiley   +1 more source

Cortical bone distribution in the human mandibular symphysis: Ontogenic and morphometric approaches in archeological context

The Anatomical Record, EarlyView.
Abstract The human mandibular symphysis concentrates multiaxial loads during function and remodels throughout growth, but the precise mechanisms underlying cortical bone shape during growth remain relatively unexplored. Approaches based solely on thickness or external cortical contours provide only partial insights and do not capture the functional ...
Ana Ribeiro, Elsa Garot, Christine Couture, Pierre‐Hadrien Decaup   +3 more
wiley   +1 more source

THREE-DIMENSIONAL MSCT ANALYSIS OF SEXUAL DIMORPHISM IN FACIAL SKULL AND PIRIFORM APERTURE MORPHOLOGY IN SOUTH BULGARIA [PDF]

Journal of IMAB
Purpose: Human skeleton exhibits varying degrees of sexual dimorphism – the pelvic bones, limbs long bones and the skull are the most frequently studied.
Zlatizara Todorova, Ferihan Popova, Irina Angelova, Zdravka Harizanova, Iva Naydenova, Tsvetan Tsvetanov   +5 more
doaj   +1 more source

Three‐dimensional geometric morphometric analysis of diaphragmatic dome motion in COPD patients

The Anatomical Record, EarlyView.
Abstract Diaphragmatic dysfunction is a hallmark of chronic obstructive pulmonary disease (COPD), especially in emphysema, where hyperinflation alters diaphragm geometry and impairs inspiratory mechanics. However, quantitative three‐dimensional (3D) assessments of diaphragmatic dome shape and motion across COPD phenotypes are limited.
José M. López‐Rey, Benoît Beyer, Elena García‐Vargas, Isabel Torres‐Sánchez, Francisco García‐Río, Markus Bastir   +5 more
wiley   +1 more source

Much more than their fangs: Macroscopic anatomy of the brain of Bothrops moojeni Hoge 1966 (Squamata, Serpentes, Viperidae)

The Anatomical Record, EarlyView.
Abstract Neuroanatomical research has progressed considerably in several vertebrate lineages, yet studies of reptilian brain morphology remain markedly underdeveloped. Here we provide the first description of macroscopic brain anatomy and its ontogeny in the viperid Bothrops moojeni, based on a sample of seven individuals.
Paula Araújo, Júlio César Costa de Souza, Angele Martins   +2 more
wiley   +1 more source

New estimates indicate that males are not larger than females in most mammal species

Nature Communications
Sexual size dimorphism has motivated a large body of research on mammalian mating strategies and sexual selection. Despite some contrary evidence, the narrative that larger males are the norm in mammals—upheld since Darwin’s Descent of Man—still ...
Kaia J. Tombak, Severine B. S. W. Hex, Daniel I. Rubenstein   +2 more
doaj   +1 more source

BMC Genomics, 2011
Background Despite virtually identical DNA sequences between the sexes, sexual dimorphism is a widespread phenomenon in nature. To a large extent the systematic differences between the sexes must therefore arise from processes involving gene regulation ...
Kim Yong-Hwan, Hasselquist Dennis, Hansson Bengt, Naurin Sara, Bensch Staffan   +4 more
doaj   +1 more source

Hepatic morphology and serum biochemical profile according to dry and rainy seasons in Pygocentrus nattereri (Characiformes: Serrasalmidae)

The Anatomical Record, EarlyView.
Abstract This study investigated the physiological and morphological adaptations of the liver of the carnivorous fish Pygocentrus nattereri (piranha) in response to seasonal variations (dry and rainy seasons) in the Brazilian Pantanal. The objective was to describe how the liver, a central organ in metabolic regulation, responds to environmental ...
Maria Eduarda Corona Garcia, Sandriely F. Marcondes, Mayara S. Siqueira, Taynara R. F. Leão, Robson A. Rodrigues, Karine N. N. Farias, André L. N. Silva, Karin Virgínia Kuibida, Lilian Franco‐Belussi, Carlos E. Fernandes   +9 more
wiley   +1 more source

Ontogenetic shape changes and sexual dimorphism in Aegla marginata Bond-Buckup and Buckup, 1994

Anais da Academia Brasileira de Ciências, 2018
A study on relative growth, sexual dimorphism and ontogenetic trajectory was carried out in a population of the aeglidAegla marginata coming from Barrinha River, Iguape River Basin, Tunas do Paraná, Paraná State, Brazil.
CAROLINA L. ADAM, MURILO Z. MAROCHI, SETUKO MASUNARI   +2 more
doaj   +1 more source