Relationship between ovarian cycle phase and sexual behavior in female Japanese macaques (Macaca fuscata).

The biogeography and evolution of female homosexual behavior in Japanese macaques.

In certain Japanese macaque (Macaca fuscata) populations, females routinely engage in same-sex courtship, mounting, and consortship activity. Drawing on behavioral, biogeographic, and genetic research, we suggest that female homosexual behavior may be associated with genetically distinct free-ranging populations of Japanese macaques. In addition, we briefly discuss the implications of this rese...

A sexually dimorphic hypothalamic nucleus in a macaque species with frequent female-female mounting and same-sex sexual partner preference.

In some captive and free-ranging populations, unmanipulated female Japanese macaques (Macaca fuscata) routinely court, mount (with pelvic thrusting), compete for, and even prefer, on occasion, certain female sexual partners over certain males. The goal of this study was to determine if the cytoarchitecture of the dorsocentral portion of the anterior hypothalamic nucleus (AHdc), was male-typical...

Do males time their mate-guarding effort with the fertile phase in order to secure fertilisation in Cayo Santiago rhesus macaques?

In contrast to most mammalian species, female sexual activity is not limited to the fertile phase of the ovarian cycle in anthropoid primates, which has long been proposed to conceal the timing of ovulation to males. It is now generally believed that females are still most attractive during the fertile phase, leading to high-ranking males successfully mate-guarding them specifically during this...

Title Functions of an unreported " rocking - embrace " gesture between female Japanese Macaques ( Macaca fuscata ) in Kinkazan

Growth pattern of the maxillary sinus in the Japanese macaque (Macaca fuscata): reflections on the structural role of the paranasal sinuses.

To investigate the claim that the primate paranasal sinuses possess not a functional but a structural role associated with the skull architecture (Blaney, 1990), the relationship between the maxillary sinus and the skull architecture was studied ontogenetically in 30 skulls of male and female Japanese macaques (Macaca fuscata). Coronal CT scan series and computerised 3-dimensional images served...