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Published on: November 15, 2014
State-dependent learned valuation drives choice in an invertebrate
Lorena Pompilio1, Alex Kacelnik, Spencer T Behmer
1Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK.
Summary
State-dependent valuation, a bias towards costly items, is found in locusts, suggesting it
Area of Science:
- Behavioral Ecology
- Neuroethology
- Evolutionary Biology
Background:
- Vertebrates exhibit state-dependent valuation, preferring costly items associated with poor condition.
- The evolutionary origins of this phenomenon (convergence vs. ancestral trait) remain unclear.
Purpose of the Study:
- To investigate state-dependent valuation in invertebrates.
- To determine if this behavior is an evolutionarily conserved trait or an adaptive solution.
Main Methods:
- Behavioral experiments with the desert locust (Schistocerca gregaria).
- Analysis of choice preferences under varying physiological states.
Main Results:
- Desert locusts demonstrate state-dependent valuation, mirroring vertebrate behavior.
- This finding extends the known phylogenetic range of state-dependent valuation.
Conclusions:
- State-dependent valuation is not limited to vertebrates.
- The presence in locusts suggests this mechanism is an ecologically rational solution to common choice problems, likely arising from convergent evolution.
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