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

Search research articles

Related Experiment Videos

Morphological castes in a vertebrate.

M J O'Riain¹, J U Jarvis, R Alexander

¹Centre National de la Recherche Scientifique, Laboratoire d'Ecologie, Université Pierre et Marie Curie, F-75252 Paris, France. joriain@botzoo.uct.ac.za

Proceedings of the National Academy of Sciences of the United States of America

|November 23, 2000

Summary

This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by

Same author

The impact of surgical research pipeline programs on underrepresented minority high school and undergraduate students' career development.

American journal of surgery·2025

Same author

Baboon travel progressions as a "social spandrel" in collective animal behaviour.

Behavioral ecology : official journal of the International Society for Behavioral Ecology·2025

Same author

The curious case of the hypothalamic-pituitary-gonadal axis dysfunction in subordinate female naked mole-rats (Heterocephalus glaber): No apparent role of opioids and glucocorticoids.

Journal of neuroendocrinology·2024

Same author

Maternal propranolol treatment for fetal pleural effusion.

Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology·2024

Same author

Adjudicating Mild Cognitive Impairment Due to Alzheimer's Disease as a Novel Endpoint Event in the TOMMORROW Prevention Clinical Trial.

The journal of prevention of Alzheimer's disease·2022

Same author

A Modular Digital Twinning Framework for Safety Assurance of Collaborative Robotics.

Frontiers in robotics and AI·2022

Same journal

Chemotactic self-organization captures the dynamics of mammalian hair follicle patterning.

Proceedings of the National Academy of Sciences of the United States of America·2026

Same journal

Tomographic imaging of superconducting order using particle-hole interference.

Proceedings of the National Academy of Sciences of the United States of America·2026

Same journal

Inhibitory potential of autologous neutralizing antibodies sets quantitative limits on the rebound-competent HIV-1 reservoir.

Proceedings of the National Academy of Sciences of the United States of America·2026

Same journal

Inferring epidemiological parameters under an infectious phylogeography model with visitor dynamics.

Proceedings of the National Academy of Sciences of the United States of America·2026

Same journal

Analytical modeling for suction cup designs for skin-interfaced wearable devices.

Proceedings of the National Academy of Sciences of the United States of America·2026

Same journal

Improving cell-free metabolism through direct integration of artificial respiratory chains.

Proceedings of the National Academy of Sciences of the United States of America·2026

See all related articles

Naked mole-rats exhibit complete physical dimorphism, with distinct reproductive and helper castes. This vertebrate caste evolution, driven by lumbar vertebrae changes in females, mirrors insect social evolution.

Area of Science:

Evolutionary Biology
Zoology
Animal Behavior

Background:

Morphological specialization for specific roles was previously thought unique to social invertebrates.
Eusociality in vertebrates is rare, with limited examples of distinct physical castes.

Purpose of the Study:

To investigate the evolution of physical dimorphism in the eusocial naked mole-rat.
To determine if morphological castes exist in vertebrates and compare them to other social systems.

Main Methods:

Comparative anatomical analysis of reproductive and helper naked mole-rats.
Examination of skeletal morphology, specifically lumbar vertebrae.
Analysis of developmental changes related to reproduction.

Main Results:

Related Experiment Videos

Complete physical dimorphism observed between reproductive and helper naked mole-rats.
Lumbar vertebrae lengthen post-reproduction onset in females, creating distinct castes.
This contrasts with continuous size variation in other cooperatively breeding vertebrates.

Conclusions:

The naked mole-rat is the sole known vertebrate with morphological castes.
Convergent evolution of castes in mammals and insects driven by reproductive skew and fecundity.
Identifies selective conditions favoring caste evolution in animal societies.