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A Complex Diving-For-Food Task to Investigate Social Organization and Interactions in Rats

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Polymorphic social organization in an ant.

Richard J Gill¹, Andres Arce, Laurent Keller

¹Department of Biological Sciences, University of Hull, Cottingham Road, Hull HU67RX, UK.

Proceedings. Biological Sciences

|October 2, 2009

Summary

This summary is machine-generated.

Social organization in ants (Leptothorax acervorum) varies, with some populations showing functional monogyny (one queen reproduces) and others polygyny (multiple queens reproduce). This social polymorphism has a genetic basis and evolved recently.

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Area of Science:

Evolutionary biology
Behavioral ecology
Social evolution

Background:

Understanding social organization variation is key to explaining social evolution.
Ants (Leptothorax acervorum) typically exhibit polygyny (multiple reproducing queens).
Some populations may show functional monogyny (single reproducing queen), but evidence is limited.

Purpose of the Study:

To investigate the social organization polymorphism in Leptothorax acervorum.
To determine the stability and underlying causes of functional monogyny.
To explore the genetic basis and evolutionary divergence of social phenotypes.

Main Methods:

Field observations and genetic analysis (mtDNA and nDNA) of Spanish ant populations.
Controlled laboratory experiments comparing colonies under identical conditions.
Analysis of social stability, queen re-adoption, and queen turnover rates.

Main Results:

Confirmed functional monogyny in a Spanish Leptothorax acervorum population, demonstrating stable social organization.
Found no genetic distinction between polygynous and functionally monogynous populations using mtDNA and nDNA.
Observed no change in social organization when colonies were moved to identical laboratory conditions, indicating a genetic basis.

Conclusions:

Social organization in Leptothorax acervorum exhibits a marked polymorphism with a likely genetic basis.
The divergence between social phenotypes appears to be recent and not driven by environmental factors alone.
Findings contribute to understanding reproductive skew and the evolution of social behavior.