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Stress in an underground empire
1Department of Biology, University of Kentucky, Lexington, KY, USA.
Biology Letters
|March 30, 2022
Summary
Social stress and environmental factors, not just glucocorticoids, may explain reproductive suppression in naked mole-rats and other social mole-rats. Colony stability influences these complex social suppression mechanisms.
Area of Science:
- Zoology
- Animal Behavior
- Ecology
Background:
- Naked mole-rats (Heterocephalus glaber) and Damaraland mole-rats (Fukomys damarensis) exhibit eusociality with extreme reproductive suppression.
- Reproduction is limited to a single breeding female and a few males, with most colony members remaining reproductively inactive.
Purpose of the Study:
- To review current knowledge on reproductive suppression in social mole-rats.
- To explore the roles of environmental conditions, colony stability, and glucocorticoids in this suppression.
Main Methods:
- Literature review synthesizing findings from field and laboratory studies.
- Analysis of evidence linking social stress, environmental factors, and hormonal regulation.
Main Results:
- Laboratory studies show no consistent glucocorticoid differences between breeders and non-breeders.
- Field studies suggest social stress, influenced by colony stability and environment, is a key factor in reproductive suppression.
Conclusions:
- Reproductive suppression in social mole-rats is a complex interplay of social stress, environmental conditions, and colony dynamics.
- Further research is needed to fully elucidate these mechanisms, moving beyond solely focusing on glucocorticoids.
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