Testicular Volume and Concentration of Spermatozoa in The Monogarnus Male Javan Gibbons (Hylobates moloch)

Abstract

In non-human primates testicutar size related to patterning of mating behavior and sperm production. Among non-human primates. Javan Gibbons (Hylohar<.m~ oioch) have a very strict and rigid social system consisling of nlonogamous family groups. The objectives of this study were I ) ID observe basal reproductive traits in male Javan Gibbons (Hylobates moloch) including concentration of spermatozoa, testicular volume and plasma concentration of testosterone and 2) to compare the ratio of body weight with testicular volume in both Javan Gibbons and Macaca fuscicularis (as a olyginandrous comparator).