Abstract # 10:

Scheduled for Saturday, September 17, 2011 09:45 AM-10:00 AM: Session 3 (Salon F (Sixth Floor)) Oral Presentation


PATTERNS OF REPRODUCTIVE AGING ACROSS PRIMATE TAXA

E. N. Videan1 and S. Atsalis2
1University of Michigan, University Committee on Use and Care of Animals, Ann Arbor, MI 48109, USA, 2Zoological Society of San Diego, CRES
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In women, extrinsic factors, such as individual reproductive histories can impact the rate of follicular loss and, thus, the age at reproductive cessation. Similarly, in alloprimates, life history variation, including that which results from differences between captive and wild conditions, may affect reproductive schedules and the rate of follicular loss. Specifically, the accelerated development combined with increased longevity observed in captive primates may result in intraspecific differences in reproductive cessation when comparing wild and captive populations. If accelerated development is a key factor in explaining the longer post-reproductive lifespans of captive populations, we predict that captive individuals should experience earlier age at first birth and fewer years spent gestating and lactating resulting in increased follicular depletion during the adult lifespan, followed by earlier reproductive cessation (age at last birth), compared to wild populations. We examined life history variables for captive and wild primate populations representing twenty-three taxa and determined the average post-reproductive lifespan (PRLS = average maximal lifespan - average age at last birth + average interbirth interval) . Our analyses reveal that most primate taxa are capable of experiencing a PRLS and, as predicted, captive primate populations (PRLS=4.3+/-3.0) experience longer postreproductive life than wild populations(PRLS=0.9+/-1.5) (t=7.1, p<0.001). Nevertheless, there is considerable variability in length of PRLS experienced by captive females and we will discuss possible reasons for intraindividual differences exhibited.