Small Mammal Fauna of Public Pastures in Northern Tochigi, Japan

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  • Tsukada Hideharu
    Department of Grazing Animal Production, National Institute of Livestock and Grassland Science(NILGS)
  • Imura Tsuyoshi
    Department of Livestock and Grassland Science, National Agricultural Research Center for Western Region
  • Sutoh Madoka
    Department of Animal Physiology and Nutrition, National Institute of Livestock and Grassland Science(NILGS)
  • Kosako Takami
    Department of Grazing Animal Production, National Institute of Livestock and Grassland Science(NILGS)
  • Fukasawa Michiru
    Department of Grazing Animal Production, National Institute of Livestock and Grassland Science(NILGS)

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  • 栃木県北部公共草地における小型哺乳動物相

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Abstract

The species composition of the small mammal fauna in pastures and its relationship with pasture characteristics were investigated in the northern part of Tochigi, Japan. Small mammals were captured using the Sherman trap in the spring, summer, and autumn of 2001. Sixty-seven animals of 6 species (Apodemus speciosus, Micromys minutus. Microtus montebelli, Crocidura dsinezumi, Urotrichus talpoides, and A. argenteus) and 466 animals of 6 species were caught at pastures and woodlands. The number of captured animals in woodlands was seven times larger than that in pastures. Species richness is high in tall-grass pastures and shows significantly negative correlations with grazing intensity. In order to raise livestock in pastures while sustaining high species richness of small mammal fauna, it is important that grazing management is designed in consideration of the wood-land-pasture combination and tall-grass type pasture maintained by partial grazing regulations.

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