Estrous Cycles and Mating Behavior in a Free-Ranging Band of Rhesus Monkeys

Clinton H. Conaway · Carl B. Koford

126 citations0/0 files storedJournal of Mammalogy

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Primate Behavior and Ecology Animal Behavior and Reproduction Evolutionary Psychology and Human Behavior

Abstract

The introduced rhesus monkeys on Cayo Santiago, Puerto Rico, have an annual reproductive cycle with estrous periods limited to the months from July to January. The most intensive breeding occurs in September and October. The periodicity of estrus in the 34 mature females of one social group was studied during the 1960 breeding season. Among the 28 which gave birth, 20 apparently conceived during the first estrous period, 6 did not conceive until the second and the time when 2 conceived was uncertain. Distinct estrous periods occurred during the early part of gestation. Thirteen of the 28 pregnant females had at least one such postconception estrous period. Higher ranking males were in general more active breeders than lower ranked animals, but breeding activity did not decrease with decreasing dominance in a regular and predictable manner. Aggression among males as a result of competition for estrous females was not seen.

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1962A FIELD STUDY OF THE SOCIOBIOLOGY OF RHESUS MONKEYS, MACACA MULATTA *1942Sexual behavior of free ranging rhesus monkeys (Macaca mulatta). I. Specimens, procedures and behavioral characteristics of estrus.1956Physical growth of the rhesus monkey (Macaca mulatta)

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1983Reproductive activity in relation to male dominance and the likelihood of ovulation in rhesus monkeys 1978Social Relationships Among Adult Male and Female Baboons. Ii. Behaviour Throughout the Female Reproductive Cycle 1993Male rank, reproductive behavior, and reproductive success in free-ranging rhesus macaques 1970Evidence for seasonal variation in aggressive behaviour by Macaca mulatta 1992Measuring female mate choice in Cayo Santiago rhesus macaques 1974The sexual behavior of Japanese monkeys 1976Mating in the rhesus monkey ( Macaca mulatta ) after conception and its relationship to oestradiol and progesterone levels throughout pregnancy 1976Paternity and status in a rhesus monkey group

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