Imported Fire Ants Discard Cricket Eggs
Author Information
Author(s): Chen Jian, Ni Xinzhi, Grodowitz Michael J.
Primary Institution: United States Department of Agriculture-Agricultural Research Service
Hypothesis
Cricket eggs contain fatty acids on the egg surface that elicit necrophoric behavior in fire ants.
Conclusion
Fire ants discard cricket eggs due to their chemical profile, which resembles that of dead ants, triggering necrophoric behavior.
Supporting Evidence
- Fire ants consumed most of the soft tissues of crickets but avoided their eggs.
- Chemical analysis showed that cricket eggs have a fatty acid profile similar to that of dead ants.
- Ants displayed necrophoric behavior by discarding cricket eggs onto refuse piles.
Takeaway
Fire ants eat most of the cricket but throw away the eggs because they smell like dead ants, which makes them think they should get rid of them.
Methodology
The study involved bioassays to observe ant behavior towards cricket eggs and chemical analysis of fatty acids on the eggs and dead ants.
Limitations
The study did not explore all potential chemical cues that might influence ant behavior.
Statistical Information
P-Value
p = 0.0003; p < 0.0001; p = 0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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