Tight hormonal phenotypic integration ensures honesty of the electric signal of male and female Brachyhypopomus gauderio

► Hormonal integration could assure honesty of hormonally regulated signals. ► Androgens regulate the duration of the electric signal of B. gauderio. ► Signal duration reliably indicates androgen levels. ► Signal duration also indicates other reproductive traits. ► Androgens integrate signal duration with other traits.