Testicular volume and semen characteristics in the endangered southern muriqui (Brachyteles arachnoides)

The southern muriqui (Brachyteles arachnoides) is an endangered Neotropical primate. Semen collection and description of its traits, as well as testicular morphometry, have never been reported for this species.Testicles from five healthy adult captive southern muriqui were measured, and semen was collected by rectal probe electrostimulation (RPE).A solid coagulum was identified in all ejaculates, and none of them liquefied, spontaneously or...