Article
Anthropology
Elizabeth A. Moffett
Summary: The study found sexual dimorphism in non-obstetric pelvic size and shape among anthropoid primates, similar to the dimorphism seen in the birth canal. However, the magnitude of dimorphism in non-obstetric pelvic shape tends to be greater in species birthing relatively large neonates compared to those birthing smaller neonates relative to maternal pelvic size.
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2021)
Article
Biology
Angie S. Reyes, Amaury Bittar, Laura C. C. Avila, Catalina Botia, Natalia P. Esmeral, Natasha I. Bloch
Summary: This study investigates brain neuroanatomy in 18 wild guppy populations and finds extensive variation in brain size and brain region volumes across populations in different environments and with varying degrees of predation risk. Unlike laboratory studies, differences in allometric scaling of brain regions lead to variation in brain region proportions across populations. The study also reveals an association between sexual traits and brain size.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Biology
Linda H. Lidborg, Catharine Penelope Cross, Lynda G. Boothroyd
Summary: This study suggests that strength/muscularity may be sexually selected in humans, while other forms of masculinity do not show clear evidence of selection. Further research is needed to understand the evolutionary hypotheses in non-industrialized populations.
Article
Biochemistry & Molecular Biology
Thea F. Rogers, Daniela H. Palmer, Alison E. Wright
Summary: Research shows that sex-specific patterns of splicing are correlated with phenotypic sex differences and may offer an important route to sex-specific adaptation. Understanding the role of gene regulation in males and females is crucial for the evolution of phenotypic sexual dimorphism.
MOLECULAR BIOLOGY AND EVOLUTION
(2021)
Article
Biochemistry & Molecular Biology
Jeanne Tonnabel, Etienne K. Klein, Ophelie Ronce, Sylvie Oddou-Muratorio, Francois Rousset, Isabelle Olivieri, Alexandre Courtiol, Agnes Mignot
Summary: The study investigates sexual dimorphism in plants, specifically in the dioecious wind-pollinated shrub Leucadendron rubrum, and suggests that sexual differences exist in selection of traits and effective fecundity. While males exhibit stronger spatial autocorrelation in effective fecundity at a smaller scale, higher plant density is associated with lower effective fecundity in males but not in females. Despite these sex-specific sensitivities to environmental heterogeneity, directional selection for certain traits is observed in both sexes without sexually antagonistic selection on strongly dimorphic traits.
Article
Biology
William Toubiana, David Armisen, Corentin Dechaud, Roberto Arbore, Abderrahman Khila
Summary: The study shows that there is a specific gene expression signature in the exaggerated legs of male Microvelia longipes, with male-biased genes evolving rapidly and female-biased genes over-represented on the X chromosome. Sex-biased genes tend to arrange in large genomic regions or small clusters along the chromosomes, and their number and expression are associated with the exaggerated legs of males. This suggests a pattern of common regulation through genomic proximity in association with trait exaggeration.
Article
Agriculture, Dairy & Animal Science
Chengzhi Yan, Hui Ma, Yuejun Yang, Zhiping Mi
Summary: The limb bones of the Bufo gargarizans in southwest China were found to exhibit sexual dimorphism. Males had longer forelimb skeletons, but shorter hand length compared to females. Additionally, males had larger deltoid and medial crest areas, as well as heavier humerus and radioulna weights. In terms of hindlimbs, males had greater lengths in various bone measurements, but no significant weight differences. These findings suggest that sexual selection plays a role in the evolution of sexual size and shape dimorphism in the limb bones of B. gargarizans.
Article
Biology
Glauco Machado, Bruno A. Buzatto, Diogo S. M. Samia
Summary: In many species, sexual dimorphism increases with body size when males are the larger sex but decreases when females are the larger sex, a macro-evolutionary pattern known as Rensch's rule. In this study, it was found that males were slightly smaller than females and body size did not follow Rensch's rule, whereas the length of the fourth pair of legs in males followed Rensch's rule. It is suggested that sexual selection might be stronger on the length of the fourth pair of legs than on body size in males, and the potential role of condition dependence in the emergence of Rensch's rule is discussed.
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
Veterinary Sciences
Osman Yilmaz, Davut Koca, Mustafa Eren Sahin, Talha Avcilar
Summary: This study assessed the pelvimetric values obtained from radiographic pelvis images of budgerigars in terms of sexual dimorphism. It found that there were significant differences in linear and angle measurements of the pelvis between different genders, and there were significant correlations between age, body weight, and pelvic measurement values.
VETERINARY MEDICINE AND SCIENCE
(2023)
Article
Anthropology
Sarah J. Ricklan, Sarah-Louise Decrausaz, Jonathan C. K. Wells, Jay T. Stock
Summary: This study found that the obstetric pelvis and the locomotor pelvis have morphologically distinct functions, with the obstetric pelvis showing relatively greater flexibility. The relationships between relative constraints support the hypothesis that the modern female pelvis shows evidence of both canalization and phenotypic plasticity in obstetric and locomotor structures.
AMERICAN JOURNAL OF HUMAN BIOLOGY
(2021)
Article
Behavioral Sciences
Clare M. Kimock, Lauren J. N. Brent, Constance Dubuc, James P. Higham
Summary: The study found that canine height and body mass in rhesus macaques are not related to dominance rank, but similarity in dominance rank affects the occurrence of aggressive interactions. Additionally, dominance rank predicts the likelihood of winning an agonistic interaction.
Article
Multidisciplinary Sciences
Fleur van Eyndhoven, Elissa Z. Cameron, Sarah P. Flanagan
Summary: This study reports courtship displays in the wide-bodied pipefish, a species with extreme sexual dimorphism. Surprisingly, females also use their sex-specific ornament during courtship, while males initiate chasing behaviors in some cases. These findings provide important insights into the potential roles of sexual selection and sexual conflict in shaping sexual dimorphism.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Zoology
Tao Liang, Shai Meiri, Lei Shi
Summary: Rensch's rule shows a weak pattern in lizards with more applicability to oviparous species than viviparous ones. In viviparous lineages, female-biased sexual dimorphism is more prominent due to infrequent reproduction and evolution of large sizes to maximize fecundity.
INTEGRATIVE ZOOLOGY
(2022)
Article
Behavioral Sciences
Wei Zhou, Long Yu, Bernetta Z. W. Kwek, Ge Jin, Hua Zeng, Daiqin Li
Summary: This study used S. semiglaucus as a model system and found that females pay more attention to information from both individual color patches and gross color patterns when choosing mates, while male contest outcomes were not significantly affected by male color patterns.
BEHAVIORAL ECOLOGY
(2021)
Article
Anthropology
Helen K. Kurki, Sarah-Louise Decrausaz
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2016)
Article
Anthropology
Marina Elliott, Helen Kurki, Darlene A. Weston, Mark Collard
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2016)
Article
Anthropology
Marina Elliott, Helen Kurki, Darlene A. Weston, Mark Collard
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2016)
Article
Anthropology
Stephanie E. Calce, Helen K. Kurki, Darlene A. Weston, Lisa Gould
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2017)
Article
Anthropology
Stephanie E. Calce, Helen K. Kurki, Darlene A. Weston, Lisa Gould
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2018)
Article
Paleontology
Stephanie E. Calce, Helen K. Kurki, Darlene A. Weston, Lisa Gould
INTERNATIONAL JOURNAL OF PALEOPATHOLOGY
(2018)
Article
Anthropology
Helen K. Kurki, Susan Pfeiffer, Deano D. Stynder
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2012)
Article
Anthropology
Helen K. Kurki
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2013)
Article
Anthropology
Marina Elliott, Helen Kurki, Darlene A. Weston, Mark Collard
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2014)
Article
Paleontology
Helen K. Kurki
INTERNATIONAL JOURNAL OF PALEOPATHOLOGY
(2011)
Article
Paleontology
Susan Pfeiffer, L. Elizabeth Doyle, Helen K. Kurki, Lesley Harrington, Jaime K. Ginter, Catherine E. Merritt
INTERNATIONAL JOURNAL OF PALEOPATHOLOGY
(2014)
Article
Multidisciplinary Sciences
Mariel Young, Daniel Richard, Mark Grabowski, Benjamin M. Auerbach, Bernadette S. de Bakker, Jaco Hagoort, Pushpanathan Muthuirulan, Vismaya Kharkar, Helen K. Kurki, Lia Betti, Lyena Birkenstock, Kristi L. Lewton, Terence D. Capellini
Summary: In this study, researchers used functional genomics to investigate the developmental genetic mechanisms of human pelvic shape and identified a key gestational window when human-specific morphology becomes recognizable. They found evidence of ancient selection and genetic constraint on regulatory sequences involved in ilium expansion and growth, and showed that variation in iliac traits is reduced in humans compared to African apes.
Article
Anthropology
Helen K. Kurki, Sydney Holland, Marla MacKinnon, Libby Cowgill, Benjamin Osipov, Lesley Harrington
Summary: There are differences in cross-sectional geometric (CSG) properties derived from solid contours compared to true contours (including endosteal and periosteal surfaces) in individuals during growth and development. Although the correlations are high, the error range of solid CSG properties is not within an acceptable range compared to true CSG properties. Periosteal contours alone should not be used to calculate CSG properties during growth and development.
AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY
(2022)
Article
Anatomy & Morphology
Helen K. Kurki
ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY
(2017)