Do territorial butterflies show a macroecological fighting pattern in response to environmental stability?

Area of Science:

• Ecology
• Behavioral Ecology
• Evolutionary Biology

Background:

• Territorial defense in males is favored when monopolization of females is possible.
• Asynchronous female emergence or smaller reproductive windows can influence male territorial defense strategies.
• Climatic stability may correlate with reproductive window size and female emergence synchronicity.

Purpose of the Study:

• To test if territorial male butterflies invest more in fighting in species from areas with stable climatic conditions.
• To investigate the relationship between climatic stability, reproductive windows, and territorial defense investment.

Main Methods:

• Compiled data on butterfly fighting times and trait differences between winners and losers.
• Utilized Köppen climate classification as a proxy for climatic stability.
• Analyzed fighting duration and trait asymmetry in relation to climatic conditions.

Main Results:

• Males of butterfly species in stable climatic areas engaged in longer fighting durations.
• Winners were stronger than intruders only in intermediate climatic conditions.
• Significant variation existed in winner-loser comparisons within species from stable climates.

Conclusions:

• Males of butterfly species in stable climates invest more in fighting due to increased payoffs from territorial defense.
• This increased investment in fighting does not alter the influence of trait asymmetries on conflict resolution.