成年家猫大量营养素选择的几何分析

We report feeding studies on adult domestic cats designed to disentangle the complex interactions among dietary protein, fat and carbohydrate in the control of intake. Using geometric techniques that combine mixture triangles and intake plots from the geometric framework, we: (1) demonstrate that cats balance their macronutrient intake, (2) estimate the composition of the target balance and (3) reveal the priorities given to different macronutrients under dietary conditions where the target is unachievable. Our analysis indicates that cats have a ceiling for carbohydrate intake, which limits ingestion and constrains them to deficits in protein and fat intake (relative to their target) on high-carbohydrate foods. Finally, we reanalyse data from a previous experiment that claimed that kittens failed to regulate protein intake, and show that, in fact, they did. These results not only add to the growing appreciation that carnivores, like herbivores and omnivores, regulate macronutrient intake, they also have important implications for designing feeding regimens for companion animals.

我们报道了成年家猫的喂养研究，旨在解开饮食中蛋白质、脂肪和碳水化合物之间复杂的相互作用，以控制摄入量。使用几何技术结合几何框架中的混合三角形（营养几何学）和摄入量图，我们：(1)证明猫平衡它们的常量营养素摄入量，(2)估计目标平衡的组成，(3)揭示在目标无法实现的饮食条件下给予不同常量营养素的优先顺序。

我们的分析表明，猫的碳水化合物摄入量有一个上限，这限制了它们的摄入量，并限制它们在高碳水化合物食物中对蛋白质和脂肪的摄取(相对于它们的目标)。最后，我们重新分析了之前一项实验的数据，该实验声称小猫未能调节蛋白质摄入量，并表明它们实际上确实调节了蛋白质的摄入量。这些结果不仅增加了人们对食草动物和杂食动物等肉食动物（此处原文的表达似乎是有问题的，like应该去掉）调节大量营养素摄入量的认识，而且对设计伴侣动物的喂养方案也有重要意义。

原文

Hewson-Hughes, A. K., Hewson-Hughes, V. L., Miller, A. T., Hall, S. R., Simpson, S. J., & Raubenheimer, D. (2011). Geometric analysis of macronutrient selection in the adult domestic cat, Felis catus. J Exp Biol, 214(Pt 6), 1039-1051. doi: 10.1242/jeb.049429