Fioramonti J, Ruckebusch Y
Ann Rech Vet. 1976;7(3):281-95.
The production of soft pellets (caecotrophs) was studied in conjunction with feeding behaviour, biochemical changes in caecal contents, motility of the caeco-colic region and transit of digesta in the colon in rabbits fed ad lib. or receiving one or two daily meals. Studies were carried out on animals either collared or free in their cages. Ingestion of soft pellets was recorded from electrodes fixed in the esophageal wall. Similar electrodes positioned on the caecum, proximal and distal colon and the fusus coli monitored regional electrical activity. Transit time for the colon was determined using a marker substance PSP. In animals fed ad lib. soft pellets were usually produced in the morning and this occurred 5 to 6 hours after the daily meal in the same animals. In subjects fasted for 15 hours, a daily meal was followed by increase in the volatile fatty acid concentration and decrease in the pH of caecal contents. Irrespective of the regimen the production of soft pellets coincided with a decrease in motility of both caecum and proximal colon and an increase in that of the distal colon. The transit time for the colon was 1.5 to 2.5 times faster for the production of soft than for the production of hard pellets.
对自由采食或每日进食一至两次的兔子，结合其采食行为、盲肠内容物的生化变化、盲肠-结肠区域的运动以及结肠内食糜的转运，研究了软粪粒（盲肠便）的产生情况。研究在笼中佩戴项圈或自由活动的动物身上进行。通过固定在食管壁上的电极记录软粪粒的摄入情况。位于盲肠、结肠近端和远端以及结肠袋的类似电极监测区域电活动。使用标记物质酚磺酞（PSP）测定结肠的转运时间。自由采食的动物，软粪粒通常在早晨产生，且在同一动物每日进食后约5至6小时出现。禁食15小时的实验对象，进食后盲肠内容物的挥发性脂肪酸浓度升高，pH值降低。无论采用何种饲养方案，软粪粒的产生都与盲肠和结肠近端的运动减少以及结肠远端的运动增加同时发生。软粪粒产生时结肠的转运时间比硬粪粒产生时快1.5至2.5倍。
