the relative amount of females and males accessible at the time whenever reproduction might occur. In mammals with internal lactation and gestation, there are frequently lesser females receptive to copulation than accessible males, producing operational sexual-ratio bias in the direction of males, even though adults of both genders might be present in identical numbers.

OPERATIONAL SEX RATIO: "The operational sex ratio was 6:3."
Cite this page: N., Pam M.S., "OPERATIONAL SEX RATIO," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/operational-sex-ratio/ (accessed October 20, 2021).