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帯広畜産大学キャンパスにおけるエゾリスの生態 : 1. 巣と営巣木の選択 19
山口, 由依; 柳川, 久; YAMAGUCHI, Yui; YANAGAWA, Hisashi.
 帯広畜産大学構内において2009年4月下旬から8月にかけて,エゾリスSciurus vulgaris orientis の巣と営巣木の選択に関して調査した.計43個のエゾリスの巣が発見され,その内訳は 球状巣14巣,皿状巣26巣およびその他3巣であった.本種は球状巣および皿状巣の営巣木において, 樹高が高く,胸高直径の大きい針葉樹を選択した.営巣木を中心とした半径11.28mのプロット 内における,立木密度と胸高断面積の合計は,いずれも球状巣の周辺において皿状巣の周辺より も値が大きかった.エゾリスの営巣木を保全するためには,営巣木だけでなく,その周辺の環境 にも注意する必要があるだろう.We performed an investigation on red squirrels’ nests and selection of nest trees from late April to August 2009 on the campus of Obihiro University of Agriculture and Veterinary Medicine. Forty-three nests were found, of which 14 were dreys, 26 were nests, and 3 were not classifiable. For their dreys and nests, red squirrels chose high conifer trees with large DBH. Within a plot 11.28m in radius around nest trees, the totals of tree density and those of basal...
Palavras-chave: エゾリス; 球状巣; 皿状巣; 営巣木選択; 大学キャンパス; Red squirrel; Drey; Nest; Nest tree selection; University campus.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2723
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