Habitat variables of the Japanese squirrel identified by regression tree model

Noriko Tamura; Norio Takahashi; Nobuhiko Satou

doi:10.3106/1348-6160(2006)31[1:HVOTJS]2.0.CO;2

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Noriko Tamura,^1,* Norio Takahashi,² Nobuhiko Satou³

¹1 Tama Forest Science Garden, FFPRI, Todori 1833, Hachioji, Tokyo 193-0843, Japan
²2 National Research Institute of Far Seas Fisheries, 5-7-1 Shimizu Orido, Shizuoka 424-8633, Japan
³3 Ecosystem Conservation Society-Japan, Otowa Bldg. 2-30-20 Nishi-ikebukuro, Toshima-ku, Tokyo 171-0

^**To whom correspondence should be addressed. E-mail: haya@ffpri.affrc.go.jp

Abstract

Habitat variables of the Japanese squirrel, Sciurus lis Temminck, were analyzed by the regression tree method based on radio-tracking data. The results suggest that the squirrels tended to use the sites with more walnut trees from July to December, and more evergreen trees in middle layer from January to June for feeding. For nest sites, they tend to use sites with more evergreen trees in the upper layer, preferably having DBH (diameter at breast height) of at least 30 cm. These results are consistent with observations in previous field studies.

Citation Download Citation

Noriko Tamura, Norio Takahashi, and Nobuhiko Satou "Habitat variables of the Japanese squirrel identified by regression tree model," Mammal Study 31(1), 1-8, (1 June 2006). https://doi.org/10.3106/1348-6160(2006)31[1:HVOTJS]2.0.CO;2

Received: 27 April 2005; Accepted: 1 November 2005; Published: 1 June 2006

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