Prenatal growth of long bones in rhesus and squirrel monkeys ( Macaca mulatta and Saimiri sciureus )

Fetal long bone growth was studied from 59 radiographs representing 35 macaques and 79 radiographs representing 16 squirrel monkeys. From lateral abdominal radiographs of pregnant females total lengths of long bone shadows were measured to the nearest millimeter with a sliding caliper. A linear regression line was fitted to the data for each species. The high correlation coefficients (min. = 0.92) indicated not only that over 80% of the variance in longbone length was associated with the regression but also that linear regression was an acceptable model. It was determined that the macaque long bones grew more rapidly prenatally than the squirrel monkey long bones. Saimiri long bones grew at a faster rate during the second half of gestation than would be expected considering that the macaque long bones were approximately twice the length of Saimiri long bones at birth and that the duration of their gestation was about the same. Thus squirrel monkeys must achieve a greater percentage of their birth size during the second half of gestation

Animal science · Biology · Calipers · Cebidae · Gestation · Linear regression · Macaque · Pregnancy · Rhesus macaque · Saimiri sciureus · Squirrel monkey · Statistics · Zoology · Anatomy · Ecology · Hypothalamic control of reproductive hormones · Mathematics · Preterm Birth and Chorioamnionitis · Primate Behavior and Ecology

• Sequential changes in weight of the skeleton and in length of long limb bones of Macaca mulatta

  Open Access•Mildred Trotter, Barbara B Hixon et al.•American Journal of Physical…•1975

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• Phylogenetic implications of comparative primate growth rates

  Open Access•Donald McKim, Thomas C Hutchinson•American Journal of Physical…•1975

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• Growth of the fetus and placenta of the monkey ( Macaca mulatta )

  Open Access•G van Wagenen, H R Catchpole et al.•American Journal of Physical…•1965

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