伊豆大島におけるタイワンリス(Callosciurus erythraeus thaiwanensis)の食性について

概要

論文の詳細を見る
We studied the stomach contents and food items of Formosan squirrels on Izu-Oshima Island to determine food habits. The stomach contents included low proportions of animal materials and lignin throughout the year. Proportions of animal materials particularly were low in autumn, when plant materials were abundant. Proportions of plant materials were high (ca.90%). Much Testae of Camellia japonica were found in May and June. The proportion of starch increased from October to December, when Castanopsis cuspidata var. siebolldii nuts occupied much in their diets. Ten food plants were recovered. The staple food from May to September was the seeds of Camellia japonica, and Castanopsis cuspidata var. siebolldii after Camellia japonica seeds disappeared. During the winter, Formosan squirrels frequently ate the flowers of Camellia japonica. The debarking of trees by Formosan squirrels was observed in 3 seasons. Five species of trees were damaged, and the bark of Cryptomeria japonica and Trachycarpus fortunei might be the preferred component of squirrel nests. We suggested the possibilities that Formosan squirrels debark to take in a larva of insect under the bark or lick sap.
明治大学の論文
2002-03-25