ネズミ類における腸の長さの比率 On the Relations of the Length of Large Intestine and Caecum against the Length of Small Intestine in Rats
The authors measured the large intestinal length (colon 1.+rectum 1.) and the caecum length against the small intestinal length in rats of Muridae, calculating their ratios. Mean values of the ratios in each species are shown in the Table below. Large intestine and caecum are relatively long in the grass-feeder such as Cletrionomys andersoni, Anteliomys smithii and Microtus montebelli, and relatively short in seeds-and insect-feeder, Apodemus. And they are the shortest in Mus and Rattus which take the grain and cooked food. It is highly probable that the ratios of these intestinal lengths reflect the differences of the food habit and indicate the systematic significance in the related species.
動物学雑誌 69(5), 171-176, 1960-05