Decision-making in variable environments-- a case of group selection and inter-generational conflict?

Area of Science:

• Evolutionary biology
• Behavioral ecology
• Population genetics

Background:

• Organisms often need to perform critical actions once within a specific timeframe.
• Timing decisions are influenced by current payoffs and future probability distributions.
• Eusocial insects' annual nuptial flight provides a model for studying timed actions.

Purpose of the Study:

• To investigate evolutionary conflict between insect queens and offspring regarding action timing.
• To determine if environmental stochasticity influences the evolution of timing strategies.
• To analyze the role of control over timing in evolutionary outcomes.

Main Methods:

• Utilized two population genetics models to simulate timing strategies.
• Examined scenarios with varying degrees of control over action timing.
• Extended analyses to include diploid genetic systems.

Main Results:

• The optimal phenotype for timing actions is independent of who controls the timing.
• Stochasticity does not induce evolutionary conflict between generations.
• All individuals achieve equal relative reproductive success at equilibrium, negating group selection arguments.

Conclusions:

• Evolutionary conflict over action timing is ruled out in these models.
• Understanding the unit of natural selection in stochastic environments is enhanced.
• The study clarifies fitness dynamics in populations with timed, critical actions.