Visceral organs play an important role in animals' energy requirements, so their growth must be well understood. The objective of the current study was to fit and compare growth curves that best describe body and visceral organ growth over time in Saanen goats of different sexes. Data were synthesized from seven studies in which curves were fitted to visceral organ growth over time for female, intact male and castrated male Saanen goats from 5 to 45 kg body weight. The liver, pancreas, spleen, rumen–reticulum, omasum, abomasum, small intestine, large intestine and mesenteric adipose tissue (MAT) data were fitted to eight models: simple linear regression, quadratic, monomolecular, Brody, Von Bertalanffy, logistic, Gompertz and Richards. The best-fit model was chosen based on the corrected Akaike information criterion and the concordance correlation coefficient. Model parameters for each sex were compared. Overall, the model that best described visceral organ growth was the logistic model. Sex did not influence the parameters that predicted organ growth (g), except for MAT, where females presented a lower tissue deposition rate and greater inflection point than males. Irrespective of sex, at the beginning of the growth curve, the liver accounted for 28 ± 1.1 g/kg of empty body weight, and the inflection point occurred at 1.7 months. The rumen–reticulum and large intestine presented higher growth rates in the first 2 months of life. Knowledge of the visceral organ growth curve is useful in improving the understanding of the effect of nutritional requirements for goats and must be used to optimize the nutritional plans.

中文翻译：

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萨能山羊的内脏器官生长模式

内脏器官在动物的能量需求中起着重要作用，因此必须充分了解它们的生长。当前研究的目的是拟合和比较最能描述不同性别萨能山羊身体和内脏器官随时间推移的生长曲线。数据来自七项研究，其中曲线拟合了雌性、完整雄性和去势雄性 Saanen 山羊的内脏器官生长，体重从 5 到 45 公斤。将肝脏、胰腺、脾脏、瘤胃-网状组织、胃胃、皱胃、小肠、大肠和肠系膜脂肪组织 (MAT) 数据拟合到八个模型：简单线性回归、二次、单分子、Brody、Von Bertalanffy、logistic、Gompertz和理查兹。根据修正后的 Akaike 信息准则和一致性相关系数选择最佳拟合模型。比较了每种性别的模型参数。总的来说，最能描述内脏器官生长的模型是逻辑模型。性别不影响预测器官生长（g）的参数，除了 MAT，其中女性比男性表现出较低的组织沉积率和更大的拐点。不分性别，生长曲线开始时，肝脏占空重的28±1.1 g/kg，拐点出现在1.7个月。瘤胃网和大肠在生命的前 2 个月表现出更高的生长速度。