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Social Evolution in African Mole-Rats - A Comparative Overview.
Christopher G Faulkes1, Nigel C Bennett2
1School of Biological and Chemical Sciences, Queen Mary University of London, London, UK. c.g.faulkes@qmul.ac.uk.
Advances in Experimental Medicine and Biology
|August 23, 2021
Summary
African mole-rats exhibit diverse social behaviors, from solitary to highly social species like the naked mole-rat. Ecological factors drive the evolution of cooperation and social complexity in these subterranean rodents.
Area of Science:
- Zoology
- Evolutionary Biology
- Ecology
Background:
- African mole-rats are subterranean rodents with diverse social structures, from solitary to eusocial.
- The naked mole-rat is the most social rodent and an early diverging species within the clade.
- Their distribution is linked to underground food resources like roots and tubers.
Purpose of the Study:
- To explore the evolutionary pathways of sociality and cooperative breeding in African mole-rats.
- To understand the ecological drivers behind social complexity in this rodent superfamily.
- To compare the mechanisms underlying social behavior across different mole-rat species.
Main Methods:
- Phylogenetic analyses to reconstruct evolutionary relationships.
- Comparative studies across species with varying social systems.
- Examination of ecological constraints on foraging and digging behavior.
Main Results:
- Sociality and cooperative breeding have evolved convergently multiple times within African mole-rats.
- Ecological pressures related to food acquisition and subterranean life promote social complexity.
- Underlying mechanisms of social behavior show both conserved and divergent patterns.
Conclusions:
- African mole-rats provide a model system for studying the evolution of social behavior.
- Convergent evolution has shaped the diverse social systems observed in this group.
- Ecological factors are key in the development of complex sociality from simpler ancestral states.
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