First, we rotated groups of three males from a less interactive aviary into a more interactive aviary, replacing interactive males.
If a lone chimpanzee meets three or more males from a different group, they will try to kill it, showing a rather frightening degree of co-operation.
Forty participants (23 females and 17 males) from a non-clinical population were assessed using a computerised version of the BVRT and the conventional paper-and-pencil administration.
It has even been discovered that in some species of Odonata, the males will remove all the sperm of rival males from a female's body before transferring his own sperm.
In most rural areas household heads were grouped in patrilineal lineages or clans that is, a group of men descended only through males from a common ancestor, usually a great-grandfather but perhaps an even earlier ancestor.
Our rugby-league player sample consisted of 20 males from a 'Super-League' (professional) team.
Song has two primary functions: to repel other males from a defended space and to attract females and stimulate their courtship.
Thoroughly examining this critical and often neglected subpopulation, a new book discusses the conflicting perspectives, roles, and identities of African American males from a social work standpoint.
The researchers captured 50 males from a booby colony 2 weeks before their mates were due to lay eggs.
Blood samples were obtained prospectively from 45 adult, consented Caucasians (18 females and 27 males) from a donor pool of healthy volunteers.
The JTDC holds about 300 kids, almost 90percentt of whom are black males from a small handful of Chicago's most impoverished and segregated neighborhoods, like North Lawndale.
