抄録
In another paper, the author reported on the food items of wild Japanese black bears, analysed from their stomach-contents and feces. The present paper deals with some calorimetric consideration of the food of the animcal in wild state and in zoos. Each food item from the stomach-contents was newly collected in the field and measured by a bomb calorimeter. The results are shown in Table 1,and the total sustaining calories of each stomach content can be accumulated, as shown in Table 2. The largest value is 2200 kcal. It may be estimated that under the digestion-and absorption-rate is 50 percent, one satiety in a wild bear involves about 1000 kcal nutrition. On the other hand, baits for the animal in zoos contain 4536 kcal a day, as shown in Table 3,and a wild bear requires at least 4000 kcal inthe author's view. In Japan, the cutting of the natural forest, causing the lack of foods for the bear, makes it hunger and drives the animal to damage farm crops.
