Rethinking same-sex sexual behaviour: male field crickets have broad mating filters

Area of Science:

• Ethology
• Animal Behaviour
• Sexual Selection

Background:

• Same-sex sexual behaviour (SSB) is frequently observed across the animal kingdom.
• Existing explanations for SSB often frame it as an anomaly, such as mistaken identity.
• This 'mistake' framing may oversimplify complex mating decision-making processes in animals.

Purpose of the Study:

• To propose an alternative framework for understanding SSB and other misdirected sexual behaviours.
• To introduce the concept of 'mating filters' to analyze the flexibility of mating decisions.
• To investigate the mating filters of male Pacific field crickets (Teleogryllus oceanicus).

Main Methods:

• Observation and analysis of courtship behaviours in male Pacific field crickets.
• Comparison of courtship redirection towards conspecifics, juveniles, and inanimate objects.
• Evaluation of behaviour through the lens of broad versus narrow mating filters.

Main Results:

• Male Pacific field crickets exhibit SSB.
• These males also misdirect courtship towards juvenile crickets, but not plastic decoys.
• SSB and misdirected courtship appear to be part of a spectrum of behaviours, not isolated errors.

Conclusions:

• SSB in Teleogryllus oceanicus is not an anomaly but aligns with other misdirected behaviours.
• The 'mating filter' concept provides a more nuanced understanding of flexible mating decisions.
• Further research can explore the adaptive advantages of broader mating filters in various contexts.