近畿地方捕獲のイタチの消化管内容物 : 特にそのカロリー量に関連して

概要

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This paper deals with the food habits of weasels, examined from the contents of the stomachs and the intestines of the animals. The materials were collected in Kinki district, mainly in Hyogo and Kyoto Prefectures in 1972 and 1973, consisting of 332 heads of the Japanese subspecies (Mustela sibirica itatsi), 56 of the Korean subspecies (M. s. coreana, introduced) and 15 of subspecies unidentified. The occurrence rates of each food item show that more frogs were eaten than voles or mice. This result differs from previous reports which were based on materials from the northerm parts of Japan, because these materials were chiefly collected during the hunting season, namely in the winter, and the frogs in northern areas hibernate for a longer piriod and may be consumed less than in the southern areas. Concerning the volume of the contents, the larger subspecies, M. s. coreana, had 21.4ml on the average and the smaller one, M. s. itatsi, had 15.9ml. But the mean calorie level of the contents was considered to be 2.7kcal in both subspecies. It corresponds to only 3% of the daily need of the animal, which was calculated from breeding baits and estimated from their metabolic body sizes.
社団法人日本動物学会の論文
1975-09-25