Reproductive Cyclicity and Breeding in the Squirrel Monkey

Dukelow, W. Richard

doi:10.1007/978-1-4757-0812-7_7

Cited by 20 publications

(19 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Conceptions were estimated in two ways: 1 ) by subtracting 155 days from the birth date [13], and 2) by identifying the month prior to detection of pregnancy by palpation. The two methods agreed surprisingly well.…”

Section: Discussionmentioning

confidence: 99%

Seasonality in squirrel monkeys (Saimiri sciureus): Social facilitation by females

Schiml¹,

Mendoza²,

Saltzman³

et al. 1996

Physiology & Behavior

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Seasonality in squirrel monkeys (Saimiri sciureus): Social facilitation by females

Schiml¹,

Mendoza²,

Saltzman³

et al. 1996

Physiology & Behavior

View full text Add to dashboard Cite

“…Unlike many primate species (Walker & Herndon 2008), squirrel monkeys show no externally visible evidence of menstrual bleeding (Dukelow 1985), and their idiosyncratic hormonal profile distinguishes them from other primates (Yeoman et al 1991), especially Old World species (Coe et al 1985). In particular, squirrel monkeys have significantly higher circulating ovarian steroid hormone levels than humans, rhesus monkeys, and marmosets do (Hearn & Lunn 1975), and the high concentrations of these hormones appear to be associated with a compensatory decrease in the number (Chrousos et al 1984) and sensitivity (Chrousos et al 1982) of steroid receptors.…”

Section: Introductionmentioning

confidence: 94%

“…Female squirrel monkeys reach reproductive maturity between 2.5 and 3.5 years of age (Taub 1980, Coe et al 1981, Dukelow 1985; they breed seasonally, have a short ovarian cycle (7-12 days; Lang 1967, Gould et al 1973, Travis & Holmes 1974, Wolf et al 1977, and give birth approximately once every 2 years (Garber & Leigh 1997). Female squirrel monkeys can remain reproductively active up to the age of w16 years (Mendoza 1999).…”

Section: Introductionmentioning

confidence: 99%

Ovarian aging in squirrel monkeys (Saimiri sciureus)

Walker

Anderson²,

Herndon³

et al. 2009

Reproduction

View full text Add to dashboard Cite

In female squirrel monkeys (Saimiri sciureus), the reproductive period normally extends from w2.5 years to the mid-teens. In the present study, we examined the age-associated cytological changes in the ovaries of 24 squirrel monkeys ranging in age from newborn to w20 years. We found a significant, age-related decline in the number of primordial follicles, with the most pronounced loss occurring between birth and 5 years. After w8 years of age, relatively few primordial follicles were evident in the ovarian sections examined. An unusual feature of the aging squirrel monkey ovary is the emergence of highly differentiated, encapsulated clusters of granulosa cells that increase in size and number, particularly after the age of 8 years. Many of these cells express anti-Mü llerian hormone, and, histologically, the clusters resemble granulosa cell tumors in humans. However, granulosa cell clusters (GCCs) are present in both ovaries of all older squirrel monkeys, and they display no obvious signs of malignancy, suggesting that they are a normal feature of ovarian aging in this species. Our findings indicate that reproductive senescence in female squirrel monkeys, as in other primates, involves the inexorable depletion of ovarian follicles. In addition, the consistent appearance of abundant, well-differentiated clusters of granulosa cells in older squirrel monkeys, prior to the cessation of reproduction, suggests that these structures may influence the later stages of reproductive potential in this species. Analysis of GCCs in older squirrel monkeys also could yield insights into the pathophysiology of granulosa cell tumors in humans.

show abstract

“…[5 months ;Dukelow, 1985;Mitchell, 1990;Stone, 2004] is nearly a month longer than those of the similarly sized Aotus and similar to those of the larger Callicebus and Cebus [Hartwig, 1996]. Estimated prenatal growth rates provided from captive studies are also high, even when compared with the twin-producing callitrichines [Garber & Leigh, 1997;Hartwig, 1996;Leigh, 2004;Ross, 1991].…”

Section: Life Historymentioning

confidence: 87%

Integration of field and captive studies for understanding the behavioral ecology of the squirrel monkey (Saimirisp.)

Zimbler-DeLorenzo

Stone

2011

American J Primatol

View full text Add to dashboard Cite

Captive and field studies both provide valuable and complementary information that lead to a better understanding of a species' behavioral ecology. Here, we review studies from wild, captive, and semi-free ranging populations of squirrel monkeys (Saimiri sp.), in order to (a) provide a more current (1985-2010) review of Saimiri behavioral ecology and (b) illustrate that integrating data collected in a variety of settings is an effective approach to addressing ecological questions in primates. Captive environments, such as zoological facilities and research colonies, can be advantageous to researchers by allowing longitudinal studies of behavior and reproduction, as well as providing opportunities for gathering data on life history, because physiological and life history data are known for individual animals. Studies of field populations can provide contextual information regarding the adaptive nature of behaviors that are studied in captivity. Squirrel monkeys are small, neotropical primates that have extensively been used in captive research. As the last in-depth review of Saimiri biology was published in 1985 [Rosenblum & Coe, The squirrel monkey. New York: Academic Press], we review studies since conducted on Saimiri ecology, life history, social behavior, reproduction, and conservation. Our review indicates that there is much variation in socioecology and life history traits between Saimiri species and, surprisingly, also between populations of the same species studied at different locales. In addition, much is known about squirrel monkey reproductive physiology, basic ecology, and vocal communication, but data are still lacking in the fields of life history and some adaptive components and social behavior. In particular, longitudinal studies in the field would be particularly relevant for a genus with a slow life history such as Saimiri. Finally, few data (captive or wild) are available on S. ustus and S. vanzolinii, though at least one of these species is threatened.

show abstract

Reproductive Cyclicity and Breeding in the Squirrel Monkey

Cited by 20 publications

References 66 publications

Seasonality in squirrel monkeys (Saimiri sciureus): Social facilitation by females

Seasonality in squirrel monkeys (Saimiri sciureus): Social facilitation by females

Ovarian aging in squirrel monkeys (Saimiri sciureus)

Integration of field and captive studies for understanding the behavioral ecology of the squirrel monkey (Saimirisp.)

Contact Info

Product

Resources

About