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 regr...

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Bibliographic Details
Published in:American journal of physical anthropology 1972-05, Vol.36 (3), p.353-357
Main Authors: McKim Jr, Donald, Hutchinson, Thomas C., Gavan, James A.
Format: Article
Language:English
Subjects:
Animals
Arm
Bone and Bones - embryology
Female
Femur - embryology
Fetus
Gestational Age
Growth
Haplorhini - embryology
Humerus - embryology
Leg
Macaca - embryology
Monkeys
Osteology
Pregnancy
Radius - embryology
Tibia - embryology
Ulna - embryology
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Summary: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.
ISSN:0002-9483
1096-8644
DOI:10.1002/ajpa.1330360305