ARE WITHIN-SEX MATING STRATEGY PHENOTYPES AN EVOLUTIONARY STABLE STRATEGY?

Area of Science:

• Evolutionary biology
• Human behavior
• Behavioral ecology

Background:

• Human mating strategies exhibit significant variation, differing between sexes as predicted by parental investment theory.
• Recent research suggests each sex may display two distinct mating phenotypes.
• The evolutionary stability of these phenotypes remains an open question.

Purpose of the Study:

• To investigate the possibility that the co-existence of two mating phenotypes within each sex is frequency-dependent.
• To determine if these phenotypes constitute an Evolutionary Stable Strategy (ESS).
• To explore the potential compromise between male promiscuity and female preference for long-term mating.

Main Methods:

• Theoretical modeling of mating strategies.
• Analysis of frequency-dependent selection in behavioral ecology.
• Game theory approach to assess evolutionary stability.

Main Results:

• The presence of two distinct mating phenotypes may be maintained by frequency-dependent selection.
• These phenotypes can represent an ESS, balancing competing reproductive interests.
• A potential evolutionary compromise between male and female mating preferences is suggested.

Conclusions:

• The observed diversity in human mating strategies, including distinct phenotypes, may be an evolutionarily stable outcome.
• Frequency-dependent selection likely plays a role in maintaining these diverse mating strategies.
• These findings offer insights into the evolutionary dynamics of mating behavior in humans.