臺北植物園內臺灣赤腹松鼠窩之調查研究

Nest Biology of Formosan Red-bellied Tree Squirrel (Callosciurus erythraeus (Bonhote)) in Taipei Botanical Garden

方國運(Kuo-Yun Fang) ； 趙榮台(Jung-Tai Chao)

《林業試驗所研究報告季刊》 6卷4期 (1991/12) Pp. 407-417

https://doi.org/10.7075/BTFRI.199112.0407

摘要

Nests of the Formosan red-bellied tree squirrel (Callosciurus erythraeus) were investigated from January 1986 through December 1988 in Taipei Botanical Garden. Among the 72 nests found on 57 trees, 59.7% (43/72) were built in divisions Ⅱ,Ⅳ, XIV and XVII (Fig.1). Number of nests found in 1986, 1987 and 1988 was 27, 20, and 25, respectively. In 1988, newly built nests were found in every month but December, and peaks of the number of new nests appeared in March, August, October, and November. The average interval that a squirrel nest was found till its disappearance was 4.7±3.0 months (N=33). Among the 72 squirrel nests, 83.3% (60/70) were built on dicotyledon, 15.3% (11/72) on bamboos of monocotyledon. No nest was found on gymnosperm plants. The squirrel nests were found on 31 tree species belonging to 23 genera and 18 families. Fifty six percent of the total nests (40/72) were found on plants of Myrtaceae, Flacourtiaceae, and Gramineae. Twenty seven percent (20/72) of the total nests were found on Melaleuca leucadendron and Hydnocar pus anthelminthica, which were the most frequently selected nest tree species. Among the 57 nest trees, 68.4% (39/57) were introduced species and 31.6% (18/57) were native species. Twelve trees of 8 species were used repeatedly as nest trees. In dicotyledon, nests were built to a height of 7.2m to 18.7m with an average of 11.3±2.4m (N=57), and the height of the nest was significantly correlated with the height and the DBH of the tree, respectively (P＜0.01, N=57). In bamboo, nests were built to a height of 7.7m to 12.2m with an average of 9.6±l.5m (N=10). The height of the nest was significantly correlated with the height of the bamboo (P＜0.0l, N=l0), but not significantly correlated with the DBH (P＜0.01, N=l0). The number of nests and the number of trees with height over 5m and DBH over 10cm in each division was significantly correlated (r=0.74, P＜0.0l, N=12).

關鍵字

臺灣赤腹松鼠 ； 窩 ； 生物學

並列摘要

Nests of the Formosan red-bellied tree squirrel (Callosciurus erythraeus) were investigated from January 1986 through December 1988 in Taipei Botanical Garden. Among the 72 nests found on 57 trees, 59.7% (43/72) were built in divisions Ⅱ,Ⅳ, XIV and XVII (Fig.1). Number of nests found in 1986, 1987 and 1988 was 27, 20, and 25, respectively. In 1988, newly built nests were found in every month but December, and peaks of the number of new nests appeared in March, August, October, and November. The average interval that a squirrel nest was found till its disappearance was 4.7±3.0 months (N=33). Among the 72 squirrel nests, 83.3% (60/70) were built on dicotyledon, 15.3% (11/72) on bamboos of monocotyledon. No nest was found on gymnosperm plants. The squirrel nests were found on 31 tree species belonging to 23 genera and 18 families. Fifty six percent of the total nests (40/72) were found on plants of Myrtaceae, Flacourtiaceae, and Gramineae. Twenty seven percent (20/72) of the total nests were found on Melaleuca leucadendron and Hydnocar pus anthelminthica, which were the most frequently selected nest tree species. Among the 57 nest trees, 68.4% (39/57) were introduced species and 31.6% (18/57) were native species. Twelve trees of 8 species were used repeatedly as nest trees. In dicotyledon, nests were built to a height of 7.2m to 18.7m with an average of 11.3±2.4m (N=57), and the height of the nest was significantly correlated with the height and the DBH of the tree, respectively (P＜0.01, N=57). In bamboo, nests were built to a height of 7.7m to 12.2m with an average of 9.6±l.5m (N=10). The height of the nest was significantly correlated with the height of the bamboo (P＜0.0l, N=l0), but not significantly correlated with the DBH (P＜0.01, N=l0). The number of nests and the number of trees with height over 5m and DBH over 10cm in each division was significantly correlated (r=0.74, P＜0.0l, N=12).

並列關鍵字

Formosan red-bellied tree squirrel ； nest ； biology