Dynamic changes to signal allocation rules in response to variable social environments in house mice

Area of Science:

• Animal Behavior
• Chemical Ecology
• Neuroethology

Background:

• Urine marking is a crucial social behavior in male mice, used in competition and mate attraction.
• These signals are costly and depletable, requiring strategic allocation.
• Understanding how social context influences signaling decisions is key to deciphering complex animal communication.

Purpose of the Study:

• To investigate how male mice modify their scent marking strategies in response to varying social environments.
• To analyze the fine-scale temporal and spatial adjustments in marking behavior.
• To determine the impact of competitive experience and social odors on signaling decisions.

Main Methods:

• Utilized thermal imaging to capture high-resolution spatiotemporal data of urine marking.
• Recorded urinary motor patterns and marking behavior in response to social odors and competitive outcomes.
• Analyzed changes in marking effort, latency, and rhythm.

Main Results:

• Male mice exhibit significant winner-loser effects in scent mark allocation and timing.
• Competitive experience alters responses to familiar and unfamiliar male scents.
• Winners increase marking toward unfamiliar scents, while losers shift toward familiar scents.
• All males adjust marking timing post-contest, with increased marking burst frequency.
• Initial marking investment can predict later signaling behavior, suggesting diverse strategies.

Conclusions:

• Male mice dynamically adjust urine marking decisions based on social context and past experiences.
• Scent marking is a flexible communication system sensitive to competition and social familiarity.
• These findings reveal sophisticated signaling strategies in response to changing social landscapes.