|Appears in Collections:||Psychology Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Growth in colony living anubis baboon infants and its relationship with maternal activity budgets and reproductive status|
Lee, Phyllis C
|Citation:||Garcia C, Lee PC & Rosetta L (2009) Growth in colony living anubis baboon infants and its relationship with maternal activity budgets and reproductive status, American Journal of Physical Anthropology, 138 (2), pp. 123-135.|
|Abstract:||Early growth is of interest because it is susceptible to maternal effects and linked to fitness components for a range of species. Here we present anthropometric measurements on 23 infant olive baboons born into a captive colony in order to describe growth over the first two years of life, to explore maternal influences on growth, and to assess the impact of growth profiles on maternal reproduction. Six main findings emerged: 1) Infant growth rates in our colony were higher than those reported for wild populations but comparable to those observed for food-enhanced animals. 2) The ratio of infant mass to maternal mass was positively associated with reproductive parameters, such as duration of postpartum amenorrhea and interbirth interval. 3) Mothers resumed cycling and reconceived when their infants attained a relatively consistent threshold mass. 4) Infant mass-for-age was associated with maternal rank and, independently, with maternal mass such that females of high dominance rank and heavy females had relatively large infants at their resumption of cycling. 5) Low-ranking and lighter females had longer investment periods but smaller infants. They continued investment in infant through prolonged lactation until their infants reached a mass similar to that of high-ranking/heavy infants, suggesting that the lengthening of investment is essentially compensatory for slow early growth. 6) There was no relationship between infant growth and maternal activity budgets. In this colony, maternal physical and social factors rather than energetics contributed to differences among infants in growth trajectories, and infant growth underlies the time between successive reproductive events.|
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