The FDA rhesus breeding colony at La Parguera, Puerto Rico.

Experiences of the Caribbean Primate Research Center (CPRC) with the Food and Drug Administration's (FDA) rhesus monkey breeding contract at La Parguera and lessons which should have been learned are discussed. Onset of the rainy season and timing of rhesus monkey conceptions for 1973-79 showed random association. Electrocardiographic recordings of a male rhesus monkey during reproductive activity indicated extremely high and highly variable heart rates following ejaculation.