Russo A R, Ausman L M, Gallina D L, Hegsted D M
Growth. 1980 Dec;44(4):271-86.
The longitudinal growth of 69 newborn squirrel monkeys fed control semipurified diets from birth as well as the developmental chemical analysis of 51 carcasses is reported. Males were significantly heavier than females at birth and every age thereafter. Exponential curves fitted to the first two years of life in each sex showed that age and weight were highly correlated (R2 = 0.999). Therefore, the four major carcass components (water, protein, fat and ash) were expressed as a function of a single variable--body weight. Water and protein content were linearly related to body weight over a wide range of growth whereas fat and ash were more variable. Using linear regression analysis, no sex differences were found. On a percentage basis, body fat content was uniformly low (2.7%) at birth and increased to variable levels thereafter. Therefore, the subsequent analyses were done on a fat-free basis. Per cent protein (nitrogen X 6.25) increased from 16.3 at birth to 23.8% at adulthood with water decreasing from 76.4 to 68.9%. The protein:water ratio was 0.213 at birth and increased to an adult value of 0.345. The developmental curves indicated that approximately 70 to 75% of this maturation occurred in the first 3 weeks of life and was completed on, or before, 20 weeks of age. Per cent ash increased significantly from 4.41 at birth to 5.10% at adulthood.
报告了69只从出生起就喂食对照半纯化日粮的新生松鼠猴的纵向生长情况，以及51具尸体的发育化学分析结果。雄性在出生时及之后的每个年龄段都明显比雌性重。拟合每种性别生命最初两年的指数曲线表明，年龄和体重高度相关（R2 = 0.999）。因此，将四个主要的尸体成分（水、蛋白质、脂肪和灰分）表示为单一变量——体重的函数。在广泛的生长范围内，水和蛋白质含量与体重呈线性关系，而脂肪和灰分的变化更大。使用线性回归分析，未发现性别差异。以百分比计算，出生时身体脂肪含量一致较低（2.7%），此后增加到不同水平。因此，后续分析是在无脂肪基础上进行的。蛋白质百分比（氮×6.25）从出生时的16.3%增加到成年时的23.8%，水从76.4%降至68.9%。蛋白质与水的比例在出生时为0.213，增加到成年时的0.345。发育曲线表明，这种成熟的大约70%至75%发生在生命的前三周，并在20周龄时或之前完成。灰分百分比从出生时的4.41%显著增加到成年时的5.10%。
