Older monkeys' (Macaca radiata) response to new group formation: Behavior, reproduction and mortality (1980)

Jensen, G. D., Blanton, F. L., Gribble, D. H.

Abstract

Groups were formed without any preliminaries. Trauma did not play a role in the death [23%] of older [12-19 yrs of age] animals. A group of younger bonnets (5 males and 33 females under 10 yrs of age) suffered 11% mortality in the first three months after new group formation, the death all due to trauma. A group of younger rhesus (6 males and 42 females, all under 8 yrs of age) had 9% mortality in the first six months, entirely due to trauma. Another group of younger rhesus (8 males and 32 females, age ranging from 2.5 yrs to 4.5 yrs of age) had a mortality rate of 23% in the first six months, two thirds of which was due to trauma.