Survival and post-mortem measurements
Following the end of the two-night calling trials, males were returned to their original individual rearing boxes and provided standard diet and water ad libitum . Mortality was monitored and recorded daily. Upon death, pronotum width was measured as a proxy for structural body size, using a stereomicroscope (Nikon SMZ800) equipped with a digital camera and imaging software (Nikon NIS-Elements Documentation v. 4.20).