Investigating the impact of same-sex sexual behaviour on male bonding and reproductive success in Rwenzori Angolan colobus

This study aims to investigate the influence of same-sex sexual behaviour on reproductive success among Rwenzori Angolan colobus, a primate subspecies characterized by a multilevel social structure like that of early humans. Despite the supposed evolutionary paradox of same-sex sexual behaviour, given its perceived costliness and lack of direct reproductive output, recent research suggests it may facilitate social bonding and coalitionary support, potentially enhancing reproductive success. By examining behavioural data and conducting paternity analyses, we seek to address whether same-sex sexual behaviour positively impacts reproductive success, and if male-male bonding is mediated by same-sex sexual behaviour or kin relationships in this subspecies. Behavioural data and fecal samples have been collected near Lake Nabugabo, Uganda, on a group of habituated, individually identified monkeys from May to August 2022 and June 2023 to June 2024. DNA was preserved in the field and shipped to the lab of Dr. Wikberg at the University of Texas San Antonio, where DNA analysis will be conducted. Through this collaboration between the University of Toronto and the University of Texas San Antonio, this project will enhance the capacity for innovative research methodologies in Canada which address complex social dynamics, both in animal behaviour and human societies.

Faculty Supervisor:

Julie Teichroeb

Student:

Partner:

University of Texas at San Antonio

Discipline:

Sociology

Sector:

Life Sciences (not health); Other

University:

University of Toronto

Program: