Article
Ecology
Xin Zhao, Jing-Xin Liu, Zhanqi Chen
Summary: Masquerade exists universally throughout the animal kingdom, but it has been given little attention and often misinterpreted. This study focused on the orchid mantis and provided information on its population abundance, coexistence with specific plants, color morph changes, and the impact of environmental factors on its life cycle. The study also identified differences in life history between the two sexes. This systematic investigation of the orchid mantis contributes to understanding the adaptive strategies of masqueraders.
EVOLUTIONARY ECOLOGY
(2023)
Article
Multidisciplinary Sciences
Yu-Chiao Lin, MingYang Zhang, Yu-Jen Chang, Tsung-Han Kuo
Summary: Animals show different levels of sexual dimorphism in various phenotypes. Sex differences in longevity, a complex life history trait, have been observed. In this study, we examined the lifespan and stress resistance of both sexes among 15 inbred strains of fruit flies. We found positive correlations between males and females from the same strain in terms of lifespan and resistance to starvation and desiccation stress. Overall, our findings provide new data on sexual dimorphism in fly lifespan and stress resistance, which can contribute to future research on longevity mechanisms.
Article
Multidisciplinary Sciences
Sergio Nolazco, Kaspar Delhey, Shinichi Nakagawa, Anne Peters
Summary: This article examines the ornament traits and adaptive signals in birds. The study finds that although female ornaments are often less elaborate than male ornaments, both sexes show similar associations between ornaments and indicators of health and reproductive success.
NATURE COMMUNICATIONS
(2022)
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
Molly H. F. McEntee, Vivienne Foroughirad, Ewa Krzyszczyk, Janet Mann
Summary: Research on sex biases in longevity often assumes that male investment in competition results in a constant female survival advantage throughout life. However, a study on wild bottlenose dolphins showed a time-varying effect of sex on mortality hazard over their five-decade lifespan. Male dolphins had higher mortality risk during the juvenile period, but the gap between male and female mortality closed in the mid-teens when female reproduction began. Contrary to predictions, male-male competition did not result in sustained male-biased mortality. Female investment in reproduction and the high costs of sexual coercion may elevate female mortality risk and impact sex biases in lifespan.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Neurosciences
Covadonga M. Diaz-Caneja, Clara Alloza, Pedro M. Gordaliza, Alberto Fernandez-Pena, Lucia de Hoyos, Javier Santonja, Elizabeth E. L. Buimer, Neeltje E. M. van Haren, Wiepke Cahn, Celso Arango, Rene S. Kahn, Hilleke E. Hulshoff Pol, Hugo G. Schnack, Joost Janssen
Summary: Sex differences in trajectories of global sulcal morphology were observed, with females having thicker cortex until age 40 and converging trajectories thereafter. Sulcal shortening was faster before age 40, while sulcal shallowing and widening were faster afterwards. Males showed greater variability in cortex volume and lower variability in sulcal width.
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
Ornithology
Ian L. Jones, Fiona M. Hunter, Sampath S. Seneviratne, Jeffrey C. Williams, Robert Montgomerie
Summary: Both male and female Whiskered Auklets display elaborate feather ornaments, with only slightly male-biased sexual dimorphism. Ornament size is positively correlated with body condition index and is also related to ocean climate and auklet productivity.
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
Ecology
Eleanor Bath, Wayne Rostant, Harrison J. Ostridge, Sophie Smith, Janet S. Mason, Timm Rafaluk-Mohr, Judith E. Mank, Tracey Chapman, Jennifer C. Perry
Summary: The study aimed to examine the relationship between sexual selection, condition-dependence, and resource availability in fruit flies. By evolving the flies under different conditions and manipulating their developmental diet, the researchers tested several hypotheses. The results showed that sexual selection did not increase male condition-dependence and that resource availability did not affect the relationship between sexual selection and condition-dependence. This study suggests that sexual selection may not play as significant a role in the evolution of condition-dependence as previously thought.
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
Behavioral Sciences
Daniel Heimerl, Pavla Dudova, Karoline Wacker, Elisa Schenkel, Garance Despreaux, Cristina Tuni
Summary: When there are many competitors but few females available, male spiders change their mating tactics by producing more but lower quality food gifts. This allows them to secure matings while saving energy. The adult sex ratio can affect the intensity of sexual selection, and under intense competition, males may increase their investment in behaviors to outcompete rivals. However, in environments where males are more common, mating opportunities are rare, so males may reduce costly courtship and adopt alternative reproductive tactics.
BEHAVIORAL ECOLOGY
(2022)
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
Evolutionary Biology
Darryl T. Gwynne, David Punzalan, John Hunt
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
(2015)
Article
Ecology
David Punzalan, Locke Rowe
Article
Ecology
David Punzalan, Locke Rowe
ECOLOGY AND EVOLUTION
(2016)
Article
Ecology
David Punzalan, F. Helen Rodd, Locke Rowe
AMERICAN NATURALIST
(2010)
Article
Behavioral Sciences
Michael M. Kasumovic, Damian O. Elias, David Punzalan, Andrew C. Mason, Maydianne C. B. Andrade
Article
Psychology, Biological
Heather L. Auld, David Punzalan, Jean-Guy J. Godin, Howard D. Rundle
BEHAVIOURAL PROCESSES
(2009)
Editorial Material
Biochemistry & Molecular Biology
David Punzalan, David J. Hosken
Article
Entomology
David Punzalan, Locke Rowe
ECOLOGICAL ENTOMOLOGY
(2013)
Article
Mycology
Sijmen Schoustra, David Punzalan
Article
Multidisciplinary Sciences
Sijmen E. Schoustra, David Punzalan, Rola Dali, Howard D. Rundle, Rees Kassen
Article
Ecology
Amardeep Singh, David Punzalan
Article
Ecology
Vicki Mengyuan Zhang, David Punzalan, Locke Rowe
ECOLOGY AND EVOLUTION
(2020)
Article
Ecology
Stephen P. De Lisle, David Punzalan, Njal Rollinson, Locke Rowe
Summary: The study explores the paradox of stasis, where phenotypic evolution through deep time is slower than expected from microevolutionary rates. It suggests that populations may not be able to adapt quickly enough to move with shifting adaptive peaks, leading to extinction. This highlights the role of population ecology in macroevolutionary dynamics and offers an alternative perspective on the constraint of phenotypic evolution in deep time.
JOURNAL OF EVOLUTIONARY BIOLOGY
(2021)
Article
Entomology
David Punzalan, Locke Rowe
ECOLOGICAL ENTOMOLOGY
(2017)