Which group of primates is identified with minimal sexual dimorphism due to low competition?

The group characterized by minimal sexual dimorphism due to low competition is monogamous pairs. In these social structures, a male and female form a long-term bond and typically mate exclusively with each other. This arrangement leads to lower levels of competition for mates compared to other social systems where multiple males or females compete for attention, mates, or resources.

Because both sexes are functioning within a stable pair bond, the differences in size, strength, and other physical traits typically associated with sexual dimorphism are less pronounced. In monogamous pairs, the reproductive strategy emphasizes partnership over competition, reducing the selective pressures that usually drive significant differences between males and females.

In contrast, single-male groups often display high levels of sexual dimorphism, as the male competes for access to multiple females. Similarly, multimale groups and polyandrous groups involve greater competition and variance in reproductive success, leading to more pronounced differences between the sexes. Thus, the dynamics of monogamous pair bonding foster a more equitable trait distribution between males and females, resulting in minimal sexual dimorphism.