PDF(Pubmed)
Abstract：
This study evaluated the protein quality of small mammalian prey and its body organs by analyzing amino acid (AA) composition and digestibility of wild adult rats and their body organs (skin/fur, bone, muscle, intestine, liver, kidney, spleen, brain, heart, and lung) utilizing an in vitro digestion method. The average dry matter (DM) digestibility of whole rats was 89.9%. The digestibility of total AA (TAA), total indispensable AA (TIAA), and total dispensable AA (TDAA) in whole rats was 85.6, 87.0, and 87.6%, respectively. Differences in DM digestibility were observed among rat organs, ranging from 59.0% in bone to 99.8% in muscle (P < 0.001). Highly digestible organs generally exhibited AA digestibility exceeding 90%, except for cysteine (Cys) in the intestine and kidney (83.8% and 88.9%, respectively). The digestibility of AAs in skin/fur ranged from 19.7% for Cys to 81.0% for glycine (Gly). In bone, the digestibility spanned from 56.9% for Gly to 81.1% for tyrosine (Tyr). Additionally, examining the digestible indispensable AA score (DIAAS) gives us an idea of the protein quality of small mammalian prey and their body organs. Our results complement information on AA supply and digestion during prey ingestion by felids.
As obligate carnivores, free-ranging felids consume prey and rely on nutrients from animal organs. Studies in adult carnivores such as domestic cats have demonstrated the importance of the dietary amino acid profile. Therefore, this research used rats as a small prey model to analyze the amino acid composition and digestibility of whole prey and its body organs through in vitro digestion methods. Our results add information on amino acid supply and digestion during natural food intake in felids.
As obligate carnivores, free-ranging felids consume prey and rely on nutrients from animal organs. Studies in adult carnivores such as domestic cats have demonstrated the importance of the dietary amino acid profile. Therefore, this research used rats as a small prey model to analyze the amino acid composition and digestibility of whole prey and its body organs through in vitro digestion methods. Our results add information on amino acid supply and digestion during natural food intake in felids.
摘要：
本研究通过分析野生成年大鼠及其身体器官的氨基酸（AA）组成和消化率，评估了小型哺乳动物猎物及其身体器官的蛋白质质量（皮肤/毛皮，骨头,肌肉，肠,肝脏,肾,脾,脾大脑,心,和肺）利用体外消化方法。整个大鼠的平均干物质（DM）消化率为89.9％。总AA（TAA）的消化率，总必需AA(TIAA)，整只大鼠的总可有可无AA（TDAA）分别为85.6、87.0和87.6％，分别。在大鼠器官之间观察到DM消化率的差异，范围从骨骼的59.0%到肌肉的99.8%(p<0.001)。高度易消化的器官通常表现出超过90%的AA消化率，除了肠和肾脏中的半胱氨酸（Cys）（83.8％和88.9％，分别)。皮肤/毛皮中AA的消化率范围为Cys的19.7％至甘氨酸（Gly）的81.0％。在骨头里，消化率从Gly的56.9%到酪氨酸(Tyr)的81.1%。此外,检查可消化的不可或缺的AA评分（DIAAS）使我们对小型哺乳动物猎物及其身体器官的蛋白质质量有了一个了解。我们的结果补充了有关Felids捕食过程中AA供应和消化的信息。
