The shape of female mating preferences

Area of Science:

• Evolutionary Biology
• Behavioral Ecology
• Genetics

Background:

• Female mating preference "shape" defines the link between male traits and mating acceptance.
• Understanding preference shape is vital for sexual selection, mate recognition, communication, and speciation models.
• Precise measurement of preference shape has been historically challenging.

Purpose of the Study:

• To precisely measure the shape of female mating preferences for male calling song in a bushcricket species.
• To investigate how preference shape varies between different races of the species.
• To explore the evolutionary origins and potential drivers of observed preference shapes.

Main Methods:

• Quantitative analysis of female mating acceptance probabilities across a range of male calling song characteristics.
• Comparative analysis of preference shapes between distinct geographical races.
• Genetic analysis to determine the heritability of preference shapes.

Main Results:

• Female mating preference shapes exhibit significant variation between bushcricket races, ranging from directional to stabilizing.
• The observed preference shapes generally align with the distribution of male calling song traits within populations.
• Preference shapes were demonstrated to have a genetic basis.

Conclusions:

• Female mating preference shapes are genetically determined and can evolve rapidly, influencing sexual selection.
• The matching of preference shape to male trait distribution supports coevolutionary models of signal-preference evolution.
• While sensory exploitation remains a possibility, the findings are strongly compatible with coevolutionary dynamics.