Gestation and Inter-Birth Intervals in the Owl Monkey (Aotus trivirgatus griseimembra)

Hunter, John T.; Martín, Robert D.; Dixson, A. F.; Rudder, B.C.C.

doi:10.1159/000155881

Cited by 33 publications

(17 citation statements)

References 11 publications

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“…[Fernandez-Duque, 2011]. Estimates of gestation length, based on visual inspection of the profiles, were within the range obtained from captive animals (133 days [Hunter et al, 1979]; 121 days for A. azarai [Wolovich et al, 2008]). However, it is worth noting that fecal E 1 C and PdG levels do not rise above cycling levels as seen in urinary hormone profiles.…”

Section: Discussionmentioning

confidence: 60%

Hormonal Monitoring of Reproductive Status in Monogamous Wild Female Owl Monkeys (Aotus azarai) of the Argentinean Chaco

Fernández-Duque¹,

Burke²,

Schoenrock³

et al. 2011

IJFP

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The Neotropical owl monkeys (Aotus spp.) are a good model for evaluating the hypothesis that monogamy may arise if female reproductive cycles limit the mating potential of males. To evaluate this hypothesis, we first needed to assess the feasibility of using fecal sampling for monitoring the reproductive status of females. We collected fecal samples (n = 242, from 7 females) from wild adult Aotus azarai females in the Gran Chaco forests of Argentina during 3 years. Fecal estrone-1-glucuronide (E₁C) and pregnenadiol-3-glucuronide (PdG) tended to rise in parallel during the luteal phase. The average cycle length was 22 ± 3 days (n = 5 females, 10 cycles). We identified 2 conceptive cycles and characterized the E₁C and PdG profiles of 2 pregnancies. This report is the first of its kind on wild female owl monkeys. Despite the difficulties in sample collection and processing in the field and providing a species-specific validation in the laboratory, we show that fecal samples from A. azarai can be used for monitoring female reproductive status and function.

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Section: Discussionmentioning

confidence: 60%

Hormonal Monitoring of Reproductive Status in Monogamous Wild Female Owl Monkeys (Aotus azarai) of the Argentinean Chaco

Fernández-Duque¹,

Burke²,

Schoenrock³

et al. 2011

IJFP

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“…Gestational age was estimated for each sample from the date of birth, assuming a 152-day gestation for squirrel monkeys [LEW, SVG, unpublished data] and a 133-day gestation for owl monkeys [Hunter et al, 1979]. In the cases of stillbirths in squirrel monkeys a determination was made that the births were term based on an examination of the dead infant.…”

Section: Methodsmentioning

confidence: 99%

Pattern of maternal circulating CRH in laboratory‐housed squirrel and owl monkeys

Power¹,

Williams²,

Gibson³

et al. 2010

American J Primatol

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The anthropoid primate placenta appears to be unique in producing corticotropin-releasing hormone (CRH). Placental CRH is involved in an endocrine circuit key to the production of estrogens during pregnancy. CRH induces cortisol production by the maternal and fetal adrenal glands, leading to further placental CRH production. CRH also stimulates the fetal adrenal glands to produce dehydroepiandrostendione sulfate (DHEAS) which the placenta converts into estrogens. There are at least two patterns of maternal circulating CRH across gestation among anthropoids. Monkeys examined to date (Papio and Callithrix) have an early-to-mid gestational peak of circulating CRH, followed by a steady decline to a plateau level, with a possible rise near parturition. In contrast, humans and great apes have an exponential rise in circulating CRH peaking at parturition. To further document and compare patterns of maternal circulating CRH in anthropoid primates, we collected monthly blood samples on 14 squirrel monkeys (Saimiri boliviensis) and 10 owl monkeys (Aotus nancymaae) during pregnancy. CRH immunoreactivity was measured from extracted plasma by solid-phase RIA. Both squirrel and owl monkeys displayed a mid-gestational peak in circulating CRH: days 45-65 of the 152-day gestation for squirrel monkeys (mean±SEM CRH = 2694±276 pg/ml) and days 60-80 of the 133-day gestation for owl monkeys (9871±974 pg/ml). In squirrel monkeys, circulating CRH declined to 36% of mean peak value by two weeks before parturition and then appeared to increase; the best model for circulating CRH over gestation in squirrel monkeys was a cubic function, similar to previous results for baboons and marmosets. In owl monkeys, circulating CRH appeared to plateau with no subsequent significant decline approaching parturition, although a cubic function was the best fit. This study provides additional evidence for a mid-gestational peak of maternal circulating CRH in ancestral anthropoids that has been lost in the hominoid lineage.

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“…Based on one report of a timed pregnancy in A. griseimembra, the gestation period was 133 days (Hunter et al, 1979). Based on one report of a timed pregnancy in A. griseimembra, the gestation period was 133 days (Hunter et al, 1979).…”

Section: Reproductionmentioning

confidence: 99%

Nonhuman Primates

Magden

Mansfield²,

Simmons

et al. 2015

Laboratory Animal Medicine

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Gestation and Inter-Birth Intervals in the Owl Monkey (Aotus trivirgatus griseimembra)

Cited by 33 publications

References 11 publications

Hormonal Monitoring of Reproductive Status in Monogamous Wild Female Owl Monkeys (Aotus azarai) of the Argentinean Chaco

Hormonal Monitoring of Reproductive Status in Monogamous Wild Female Owl Monkeys (Aotus azarai) of the Argentinean Chaco

Pattern of maternal circulating CRH in laboratory‐housed squirrel and owl monkeys

Nonhuman Primates

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