Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Sexually Transmitted Infections

Sexually Transmitted Infections

Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...

Molecular Shape and Polarity

Molecular Shape and Polarity

Dipole Moment of a Molecule

VSEPR Theory and the Basic Shapes

VSEPR Theory and the Basic Shapes

Overview of VSEPR Theory

Male Sexual Response: Erection & Ejaculation

Male Sexual Response: Erection & Ejaculation

Sexual stimulation can take various forms, such as physical touch and visual or auditory cues. When this happens, the parasympathetic reflex in the sacral portion of the spinal cord is activated. This reflex stimulates the release of nitric oxide (NO), which then dilates the arterioles in the penis, increasing blood flow to the erectile tissues - the corpora cavernosa and corpus spongiosum.
The blood filling the erectile tissues compresses the veins, which helps to prevent blood from leaving...

Classification of Skeletal Muscle Fibers

Classification of Skeletal Muscle Fibers

Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...

Molecular Shapes

Molecular Shapes

Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.
Two regions of electron density in a diatomic...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Kinematic response to warned and unwarned perturbations in running humans.

Gait & posture·2026

Same author

Fight outcome is predicted by jumping performance and head size but not metabolic rate in male fall field crickets.

The Journal of experimental biology·2026

Same author

Assembling a physical model helps students grasp human somatosensory pathways.

Advances in physiology education·2024

Same author

A tale of two switches: Redox regulation of adenosine-5'-phosphosulfate kinase in humans and plants.

Structure (London, England : 1993)·2023

Same author

Axial muscle activation provides stabilization against perturbations while running.

Human movement science·2023

Same author

Alkaloid binding to opium poppy major latex proteins triggers structural modification and functional aggregation.

Nature communications·2022

Search research articles

Related Experiment Video

Updated: Jan 31, 2026

Sexual Crosses with the Mucoromycete Phycomyces blakesleeanus

Sexual Crosses with the Mucoromycete Phycomyces blakesleeanus

Published on: June 6, 2025

Sexual selection on skeletal shape in Carnivora.

Jeremy S Morris¹, David R Carrier²

¹Department of Biology, University of Utah, Salt Lake City, UT, 84112. j.s.morris@utah.edu.

Evolution; International Journal of Organic Evolution

|March 13, 2016

Summary

Male carnivorans show significant skeletal shape differences, reflecting adaptations for aggression and mate competition. This sexual dimorphism in skeletal anatomy is driven by sexual selection, particularly in polygynous species.

Keywords:

Aggression functional trade-offs locomotion sexual dimorphism

More Related Videos

Assessment of Sexual Behavior of Male Mice

Assessment of Sexual Behavior of Male Mice

Published on: March 5, 2020

Sexual Transmission of American Trypanosomes from Males and Females to Naive Mates

Sexual Transmission of American Trypanosomes from Males and Females to Naive Mates

Published on: January 27, 2019

Related Experiment Videos

Last Updated: Jan 31, 2026

Sexual Crosses with the Mucoromycete Phycomyces blakesleeanus

Sexual Crosses with the Mucoromycete Phycomyces blakesleeanus

Published on: June 6, 2025

Assessment of Sexual Behavior of Male Mice

Assessment of Sexual Behavior of Male Mice

Published on: March 5, 2020

Sexual Transmission of American Trypanosomes from Males and Females to Naive Mates

Sexual Transmission of American Trypanosomes from Males and Females to Naive Mates

Published on: January 27, 2019

Area of Science:

Evolutionary biology
Comparative anatomy
Mammalogy

Background:

Male reproductive success often hinges on physical competition for mates.
Social structures influence the role of aggression in intraspecific competition.

Purpose of the Study:

To investigate sexual dimorphism in skeletal shape within Carnivora.
To test if dimorphism reflects male specialization for aggression and correlates with sexual selection intensity.

Main Methods:

Utilized a large comparative dataset of skeletal shape in Carnivora.
Applied functional indices to assess traits enhancing aggressive performance.
Employed phylogenetic models to analyze evolutionary drivers of dimorphism.

Main Results:

Widespread skeletal shape dimorphism observed across carnivorans.
Males exhibit more pronounced functional traits associated with aggression.
Dimorphism is linked to sexual selection, especially in polygynous species.

Conclusions:

Carnivoran skeletal dimorphism reflects male specialization for aggression.
Sexual selection is a primary driver of this skeletal dimorphism.
Dimorphism correlates with body size dimorphism, indicating intense male-male competition.