Body mass (m_b) effects on performance curves and their interaction with temperature and thermal treatment in Triatoma infestans.

A) Relationship between temperature and m_b and its effect on walking speed: at increased m_b, performance decreased. B) Relationship between thermal treatment and m_b: most thermal treatments exhibited a negative effect of m_b on performance (i.e., 18°C ± 0°C, 18°C ± 5°C, 27°C ± 0°C, 27°C ± 5°C, and 30°C ± 0°C), with a greater slope in treatments with thermal variation (i.e., ±5°C). However, for 30°C ± 5°C, the relationship was positive, with bigger individuals performing better than smaller ones.